CN108153352A - Cooling device, system and method for electrical cabinet and wind driven generator - Google Patents

Abstract

The invention provides a cooling device, a system, a method and a wind power generator for an electrical cabinet. There are heat-generating electrical components inside the electrical cabinet, and the cooling system includes: a first heat exchange device, including a shell and a first liquid cooling medium, wherein: the shell sealingly accommodates the first cooling medium and the heat-generating electrical components; the first cooling medium Occupying part of the internal space of the housing to form a heat exchange space above the surface of the first cooling medium, and the first cooling medium is electrically insulated from the heat-generating electrical components and can at least partially immerse the heat-generating electrical components; the second heat exchange device includes: The outlet and inlet of the cooling channel are respectively connected with the inlet and outlet of the second cooling medium cooler provided outside the electrical cabinet to form a heat exchange circuit, and the circulation device is provided in the heat exchange circuit so that the second cooling medium can be Circulation flow in the heat exchange circuit. This enables the cooling channel to cool the heat in the heat exchange space through the second cooling medium.

Description

Cooling device, system, method and wind power generator for electrical cabinet

technical field

The invention relates to the technical field of cooling control of electrical equipment, in particular to a cooling device, system, method and wind power generator for an electrical cabinet.

Background technique

Switchgear is a kind of electrical equipment, and its internal components mainly include circuit breakers, disconnectors, load switches, operating mechanisms, transformers, etc. As a protection device in the circuit, the switchgear can be applied to a variety of power systems that need to distribute and control electric energy. electrical equipment. For example, it can be applied to a power system of a wind power generator. However, during the working process of the components inside the switchgear, since they need to carry a large current, the heat generated by the components will increase with the increase of the generated power. If the generated heat cannot be removed in time, it will cause serious heat accumulation inside the switchgear, and the temperature rise will directly endanger the electrical insulation performance of the components, and in severe cases, it will cause a fire, which will cause unnecessary economic losses.

The generator switchgear of the wind power generation unit is the generator circuit breaker, which is a controllable disconnection point between the generator and the power grid. The more important electrical components inside the unit. The heating components inside the switchgear of the wind turbine generator are mainly input and output wiring copper bars and terminals. The current cooling method is the traditional air-cooling method. By installing a fan on the cabinet body and designing an air outlet, the external fresh air is introduced to directly cool the heating components inside the generator switch cabinet. This cooling method has better economy, and has better applicability to medium and small-capacity wind power generators on land with less heat generation.

However, when the capacity of the wind turbine increases, the current carried by the power cable increases, which will directly lead to an increase in the air temperature inside the generator switch cabinet. In view of the fact that the switchgear generates a large amount of heat, the traditional air-cooled cooling method requires a fan with a larger power consumption and a larger size for cooling, which will increase the size of the switchgear of the generator, which in turn will lead to an increase in the shape of the wind turbine. The increase in size also leads to an increase in the power loss of the wind turbine. Moreover, the air environment where the offshore wind turbines are located contains salt spray and high humidity. If the traditional air cooling method is used to cool the generator switchgear, the air with high humidity and salt spray will be introduced into the generator. In the switchgear, this will directly affect the electrical insulation of the input and output copper wires and copper bars, accelerate the corrosion rate of these components, reduce the stability and reliability of the generator switchgear, and reduce the cost of the generator switchgear. The service life of internal components has brought serious safety hazards to the operation of wind turbines.

Therefore, there is an urgent need for a new cooling device, system, method and wind power generator for electrical cabinets.

Contents of the invention

According to an embodiment of the present invention, a cooling device, system, method, and wind power generator for an electrical cabinet are provided, which can prevent air with high humidity and salt spray from entering during the cooling process of the electrical cabinet The electrical cabinet affects the electrical components inside the electrical cabinet, ensures the stability and reliability of the electrical cabinet, and improves the cooling efficiency of the heating electrical components inside the electrical cabinet.

According to one aspect of the present invention, a cooling device for an electrical cabinet is provided, the interior of the electrical cabinet is equipped with heat-generating electrical components, the cooling device includes a first heat exchange device and a second heat exchange device, and the first heat exchange device includes The casing and the liquid first cooling medium, wherein: the casing is arranged inside the electrical cabinet and hermetically accommodates the first cooling medium and heat-generating electrical components; the first cooling medium occupies a part of the internal space of the casing so that the first cooling medium A heat exchange space is formed above the surface of the heat exchange space, and the first cooling medium is electrically insulated from the heat generating electrical components and can at least partially immerse the heat generating electrical components, so that the first cooling medium that cools the heat generating electrical components can be carried out in the heat exchange space Evaporative heat dissipation; the second heat exchange equipment includes a cooling channel filled with a second cooling medium, a second cooling medium cooler, and a circulation device, wherein: the cooling channel is set in the heat exchange space, and its outlet and inlet are respectively arranged in the electrical cabinet The inlet and outlet of the external second cooling medium cooler are connected to form a heat exchange circuit, and the circulation device is arranged in the heat exchange circuit, so that the second cooling medium can circulate in the heat exchange circuit, so that the cooling channel can pass through the first The second cooling medium cools the heat in the heat exchange space.

According to one aspect of the present invention, the cooling passage is a cooling pipeline, and the cooling pipeline includes a plurality of parallel pipelines arranged adjacent to each other at intervals.

According to one aspect of the present invention, the second heat exchanging device further includes a plurality of heat exchanging fins, and the plurality of heat exchanging fins are correspondingly arranged in the gaps formed between the multiple sections of parallel pipelines.

According to one aspect of the present invention, the outer peripheral wall of the second cooling medium cooler is provided with cooling fins.

According to one aspect of the present invention, the second heat exchange device further includes a control valve disposed in the heat exchange circuit, through which the flow rate of the second cooling medium circulating in the heat exchange circuit can be controlled.

According to one aspect of the present invention, the second heat exchange device further includes one or more cooling fans capable of cooling the second cooling medium in the second cooling medium cooler.

According to one aspect of the present invention, the second cooling medium is deionized water.

According to one aspect of the invention, the electrical cabinet is configured hermetically sealed.

According to another aspect of the present invention, there is also provided a cooling system for an electrical cabinet, including: the above-mentioned cooling device, a first temperature sensor and a first control unit, the first temperature sensor is arranged in the heat exchange space for Collecting the first temperature in the heat exchange space, and sending the first temperature to the first control unit; the first control unit pre-stores a relationship curve between the first temperature and the flow rate of the second cooling medium in the heat exchange circuit, The first control unit is enabled to receive the first temperature and adjust the flow rate of the second cooling medium in the heat exchange circuit according to the relationship curve.

According to another aspect of the present invention, the cooling system further includes a control valve disposed in the heat exchange circuit, and the control valve can control the flow rate of the second cooling medium circulating in the heat exchange circuit according to the control of the first control unit.

According to still another aspect of the present invention, there is also provided a cooling system for an electrical cabinet, including: the above-mentioned cooling device, a second temperature sensor and a second control unit, the second temperature sensor is arranged in the second cooling medium cooler In, it is used to collect the second temperature in the second cooling medium cooler, and send the second temperature to the second control unit; the second control unit can receive the second temperature, and judge whether the second temperature is greater than the preset temperature threshold , if it is determined that the second temperature is greater than the preset temperature threshold, the second control unit cools the second cooling medium in the second cooling medium cooler.

According to another aspect of the present invention, the cooling system further includes one or more cooling fans, and one or more cooling fans can cool the second cooling medium in the second cooling medium cooler according to the control of the second control unit .

According to still another aspect of the present invention, there is also provided a wind power generator, including the above cooling system, wherein the electrical cabinet is arranged in an airtight manner.

According to yet another aspect of the present invention, the electrical cabinet is a generator switch cabinet.

According to yet another aspect of the present invention, there is also provided a cooling method for cooling an electrical cabinet by using the above-mentioned cooling system, the cooling method includes: a temperature detection step, collecting the first temperature in the heat exchange space; a flow rate control step, pre- A relationship curve between the first temperature and the flow rate of the second cooling medium in the heat exchange circuit is stored, and the flow rate of the second cooling medium in the heat exchange circuit is adjusted according to the relationship curve.

According to yet another aspect of the present invention, in the flow rate controlling step, the flow rate of the second cooling medium circulating in the heat exchange circuit is controlled by a control valve.

According to yet another aspect of the present invention, there is also provided a cooling method for cooling an electrical cabinet by using the above-mentioned cooling system, the cooling method includes: a temperature collection step, collecting the second temperature in the second cooling medium cooler; cooling control Step, judging whether the second temperature is greater than the preset temperature threshold, if it is judged that the second temperature is greater than the preset temperature threshold, cooling the second cooling medium in the second cooling medium cooler.

According to still another aspect of the present invention, in the cooling control step, the second cooling medium in the second cooling medium cooler is cooled by one or more cooling fans.

To sum up, in the cooling device for an electrical cabinet according to the embodiment of the present invention, a first heat exchange device having a casing and a first cooling medium is provided in the electrical cabinet installed with heat-generating electrical components. The first cooling medium and the heat-generating electrical components are hermetically accommodated by the casing. And the first cooling medium is partially filled in the inner space of the casing to form a heat exchange space above the liquid level of the first cooling medium. Moreover, the first cooling medium at least partially immerses the heating electrical components, so that the heating electrical components can directly contact with the first cooling medium for heat exchange, and the first cooling medium can absorb heat and evaporate and dissipate heat in the heat exchange space. The cooling device in the embodiment of the present invention further includes a second heat exchange device having a cooling channel filled with a second cooling medium, a second cooling medium cooler, and a circulation device. By arranging the cooling channel in the heat exchange space, the second cooling medium cooler is arranged outside the electrical cabinet, and the inlet and outlet of the second cooling medium cooler communicate with the outlet and inlet of the cooling channel respectively to form heat exchange circuit. And the circulation device is set in the heat exchange circuit, so that the second cooling medium can circulate in the heat exchange circuit, so that the cooling channel can cool the heat in the heat exchange space through the second cooling medium, so that the heat-generating electrical parts to cool. Therefore, the first heat exchange device can cool the heat-generating electrical components through the first cooling medium in a sealed manner, and transfer the heat of the heat-generating electrical components from the electrical cabinet to the outside of the electrical cabinet in a timely manner, thereby avoiding high humidity in the external environment The air entering the electrical cabinet will corrode the electrical components inside the electrical cabinet, resulting in a decrease in the stability and reliability of the electrical cabinet. Moreover, the cooling effect is improved by directly exchanging heat between the heating electrical parts and the first cooling medium, thereby avoiding the need to configure correspondingly large-sized air-cooled components for higher-power electrical parts, which increases the size of the electrical cabinet. This in turn leads to a problem that the overall size of the system for assembling the electrical cabinet increases.

Description of drawings

The present invention can be better understood from the following description of specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

Other characteristics, objects and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals represent the same or similar features.

Fig. 1 is a schematic structural view of a cooling device according to an embodiment of the present invention installed in an electrical cabinet;

Fig. 2 is a schematic structural diagram of a cooling device installed in an electrical cabinet according to another embodiment of the present invention;

Fig. 3 is a structural schematic diagram of a cooling device installed in an electrical cabinet according to another embodiment of the present invention;

Fig. 4 is a structural schematic diagram of a second heat exchange device of a cooling device according to an embodiment of the present invention;

Fig. 5 is a schematic cross-sectional structure diagram of a second cooling medium cooler in the second heat exchange device in Fig. 4;

Fig. 6 is a structural block diagram of a heat exchange circuit according to an embodiment of the present invention;

Fig. 7 is a structural block diagram of a cooling system for an electrical cabinet according to an embodiment of the present invention;

Fig. 8 is the flowchart of the cooling method of an embodiment of the present invention;

Fig. 9 is a flowchart of a cooling method according to another embodiment of the present invention;

Fig. 10 is a schematic structural diagram of a wind power generator according to an embodiment of the present invention.

in:

10 - electrical cabinet;

20-first heat exchange equipment; 21-shell; 21a-shell; 22-first cooling medium; 23-heat exchange space; 23a-heat exchange space;

30-second heat exchange equipment; 30a-heat exchange circuit; 31-cooling pipeline; 32-heat exchange fins; 33-second cooling medium; 34-second cooling medium cooler; 341-shell; 342- Cooling ribs; 35-cooling fan;

40-circuit breaker; 41-input side wiring copper bar; 42-output side wiring copper bar; 43-connecting wire; 44-connecting wire;

50-control valve;

60 - circulation device;

71-the first temperature sensor; 72-the second temperature sensor;

81-the first control unit; 82-the second control unit;

1-wind generator; 110-tower; 120-cabin; 130-hub; 140-blade; 150-generator; 160-base; 170-generator switch cabinet.

Detailed ways

Features and exemplary embodiments of various aspects of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the present invention; and, for clarity, regions and layer thicknesses may be exaggerated. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the features, structures, or characteristics described hereinafter may be combined in any suitable manner in one or more embodiments.

The orientation words appearing in the following description all refer to the observation direction of the observer to the view, and do not limit the specific structure of the cooling device for the electrical cabinet of the present invention. "Electrical parts" appearing in other descriptions are the same as "electrical devices". In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be interpreted in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

The cooling device provided by the embodiments of the present invention can be applied to various types of electrical cabinets to cool the heating electrical components inside the electrical cabinets. It can be used in various occasions such as power plants, substations, petrochemicals, metallurgical steel rolling, light industry and textiles, factories and mines, residential quarters, and high-rise buildings. Exemplarily, the cooling device can cool the generator switchgear in the wind power generator mentioned in the following description of the embodiments of the present invention. Since the wiring copper bars and terminals are the main heat-generating electrical components in the generator switch cabinet, the embodiment of the present invention only uses the cooling device to cool the wiring copper bars and terminals in the generator switch cabinet as an example for illustration. However, the embodiments of the present invention are not limited thereto. In other embodiments, the cooling device may also be used to cool other electrical components that generate heat during operation and need to be cooled.

In order to better understand the present invention, a cooling device, a cooling system and a cooling method for an electrical cabinet according to an embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 10 .

Fig. 1 is a schematic structural diagram of a cooling device installed in an electrical cabinet 10 according to an embodiment of the present invention. As shown in Fig. A first heat exchange device 20 for a cooling medium 22, wherein: the housing 21 is arranged inside the electrical cabinet 10 and hermetically accommodates the first cooling medium 22 and heat-generating electrical components; the first cooling medium 22 occupies part of the interior of the housing 21 Space to form a heat exchange space 23 above the surface of the first cooling medium 22, and the first cooling medium 22 is electrically insulated from the heat-generating electrical components and can at least partially immerse the heat-generating electrical components, so that the first cooling medium 22 can Evaporative heat dissipation is performed in the heat exchange space 23 . The second heat exchange device 30 includes a cooling channel filled with a second cooling medium 33, a second cooling medium cooler 34, and a circulation device (not shown in the figure), wherein: the cooling channel is arranged in the heat exchange space 23, and the second The cooling medium cooler 34 is arranged on the outside of the electrical cabinet 10, and the inlet and the outlet of the second cooling medium cooler 34 communicate with the outlet and the inlet of the cooling channel respectively to form a heat exchange loop, and the circulation device is arranged in the heat exchange loop to The second cooling medium 33 can circulate in the heat exchange circuit, so that the cooling channel can cool the heat in the heat exchange space 23 through the second cooling medium 33 .

The first cooling medium 22 in the first heat exchange device 20 is directly in contact with the heating electrical components for heat exchange, that is, the heat generated during the operation of the heating electrical components can be directly transferred to the first cooling medium 22 . The first cooling medium 22 can boil and evaporate after absorbing heat, and the vapor formed after the first cooling medium 22 evaporates can exchange heat with the cooling channel in the second heat exchange device 30 in the heat exchange space 23 . Since the second cooling medium 33 in the cooling channel circulates in the heat exchange circuit, the heat can be further transferred to the second cooling medium cooler 34 outside the electrical cabinet 10, thereby realizing the integration of heat-generating electrical components through liquid The purpose of sealingly cooling and transferring the heat generated by the heating electrical parts from the electrical cabinet 10 in time. Exemplarily, when the wind power generator is an offshore wind power generator, since the heat-generating electrical parts (that is, metal devices) are sealed, it is possible to prevent the airflow with high humidity outside the electrical cabinet 10 and airflow with salt spray from entering the inside of the electrical cabinet 10 , resulting in the corrosion of metal devices, thereby increasing the stability and reliability of the electrical cabinet 10 . At the same time, since the heat-generating electrical components can be uniformly cooled by directly contacting the liquid first cooling medium 22 for heat exchange, the cooling effect is good. It avoids the need to provide large-sized air-cooled components for heating electrical components in the past, so that the overall size of the electrical cabinet 10 can be reasonably controlled without additionally increasing the size of the generating set of the wind power generator.

Specifically, the electrical cabinet 10 (that is, the generator switch cabinet) is arranged in the nacelle of the wind power generator as a housing part of the circuit protection device, and is hermetically sealed. A circuit breaker 40 is installed in the electrical cabinet 10, and the heating electrical parts are input side wiring copper bars 41 and output side wiring copper bars 42 respectively connected to the circuit breaker 40, and the circuit breaker 40 passes through the input side wiring copper bars 41 and the output side wiring copper bars. The row 42 is electrically connected with the external electrical structure, and controls the circuit at the lower end. Of course, the electrical cabinet 10 may also be an electrical cabinet that can be cooled by evaporative heat dissipation, such as a converter or a main control cabinet.

The first heat exchange device 20 includes: a shell 21 and a first cooling medium 22 . The casing 21 is a sealed rectangular box and is arranged in the electrical cabinet 10 . In order to make the heat dissipated by the input-side wiring copper bar 41 and the output-side wiring copper bar 42 in the housing 21 be transferred from the heat exchange space 23 to the outside of the electrical cabinet 10 by the second heat exchange device 30, the electrical cabinet will not be damaged. 10 As the internal temperature rises, the casing 21 can be made of heat-insulating materials, for example, it can be made of materials such as aluminum silicate fiber and silicon fiber. The first cooling medium 22 is partially filled in the inner space of the housing 21, so that the upper part of the liquid surface of the first cooling medium 22 and the inner wall of the housing 21 are jointly surrounded to form a gas-liquid exchange for the first cooling medium 22 after absorbing heat. Phase inversion heat exchange space 23. In order to meet the electrical insulation requirements and improve the thermal conductivity of the first cooling medium 22, the first cooling medium 22 can be fluorinated liquid, for example, it can be: CF ₃ CHCl ₂ , C ₄ F ₉ OCH ₃ , C ₃ H ₇ Br, Any one or more of C ₃ Cl ₂ HF ₅ , C ₂ Cl ₂ H ₃ F, and C ₂ Cl ₃ F ₃ . Of course, the size of the heat exchange space 23 can be selected according to the actual situation. For example, the required heat exchange space and heat exchange area can be calculated according to the saturation temperature and condensation temperature of the first cooling medium 22 in the actual situation. 23 size for a reasonable choice.

In this embodiment, exemplarily, the first heat exchange device 20 has two housings 21 through which the copper bars 41 on the input side and the connection terminals on the input side are separately connected to each other (not shown in the figure). , the following only takes the input side wiring copper bar 41 as an example to illustrate) and the output side wiring copper bar 42 and the output side terminal (not shown in the figure, the following only takes the output side wiring copper bar 42 as an example to illustrate) to seal cool down. Specifically, the two housings 21 are respectively arranged on both sides of the circuit breaker 40, and the two housings 21 are respectively provided with fixing structures for fixing the copper wiring bars 41 on the input side and the copper wiring bars 42 on the output side (in the figure not shown). The input-side wiring copper bar 41 and the output-side wiring copper bar 42 are respectively arranged in the two housings 21 through a fixed structure, and immersed in the first cooling medium 22 accommodated in the two housings 21 . And the connecting wires 43 that are electrically connected to the external electrical structure via the input-side wiring copper bar 41, and the connecting wires 44 that are electrically connected to the external electrical structure via the output-side wiring copper bar 42, respectively from both sides of the two housings 21. The wall protrudes sealingly. One end of the input-side wiring copper bar 41 and the output-side wiring copper bar 42 can be connected to the circuit breaker 40, and the other end can be connected to the electrical structure at the lower end.

Of course, the input side wiring copper bar 41 and the output side wiring copper bar 42 can be partially or completely submerged in the first cooling medium 22, preferably the input side wiring copper bar 41 and the output side wiring copper bar 42 are completely immersed in the first cooling medium 22. A cooling medium 22 , so that the input-side wiring copper bar 41 and the output-side wiring copper bar 42 can fully contact the first cooling medium 22 in the casing 21 for heat exchange. In an optional embodiment, as shown in FIG. 2, the input-side wiring copper bar 41 and the output-side wiring copper bar 42 can also be arranged in the inner space of the housing 21 away from the inner wall of the housing 21 as a whole, thereby enabling The input-side wiring copper bar 41 and the output-side wiring copper bar 42 are more fully in contact with the first cooling medium 22 to increase heat exchange efficiency.

In the above-mentioned embodiment, two housings 21 are arranged in the first heat exchange device 20, and the input-side wiring copper bars 41 and the output-side wiring copper bars 42 are cooled separately through the two housings 21, but the present invention The embodiments are not limited thereto. In other embodiments, only one housing can be provided in the first heat exchange device 20, and the size of the housing can be adjusted accordingly, and the input-side wiring copper bar 41 and the output-side wiring copper bar 42 can be connected simultaneously through one housing. Allow to cool. In an optional embodiment, as shown in FIG. 3 , a housing 21a in the first heat exchange device 20 may also be configured to have two independent box structures on both sides of the circuit breaker 40, The two box structures are connected at the upper part of the circuit breaker 40 to form a larger heat exchange space 23a. By setting in this way, the input-side wiring copper bar 41 and the output-side wiring copper bar 42 can be independently cooled by the lower structures of the two relatively independent housings 21a, and the first cooling medium 22 after absorbing heat can be transformed into vapor formed There is a large heat exchange area in the heat exchange space 23, so that the vapor formed by the evaporation of the first cooling medium 22 is quickly liquefied and returned to the first cooling medium 22, thereby effectively improving the connection between the input side wiring copper bar 41 and the output. The cooling efficiency of the side wiring copper bar 42. Moreover, the first heat exchange device 20 can increase the stability of the electrical cabinet 10 without additionally increasing the volume of the electrical cabinet 10 by increasing the heat transfer area of the idle space.

In the above embodiments, the housing 21 is a rectangular box, but the embodiments of the present invention are not limited thereto. In other embodiments, the housing 21 can also have a cylindrical or polyhedral structure, and the specific shape and size of the housing 21 can be selected according to the shape, size and size of the installation area of the actual heating electrical components. Please refer to Fig. 4, Fig. 5 and Fig. 6, wherein Fig. 4 is a schematic structural diagram of a second heat exchange device 30 according to an embodiment of the present invention, and Fig. 5 is a second cooling medium of the second heat exchange device 30 in Fig. 4 A schematic cross-sectional structure diagram of the cooler 34, FIG. 6 is a structural block diagram of a heat exchange circuit 30a according to an embodiment of the present invention. (Refer to FIG. 1 at the same time. In order to illustrate the positional relationship, a partial structure of the second heat exchange device 30 is shown in FIG. 1) As shown in FIG. 1, FIG. 4, FIG. 5 and FIG. 6, according to an embodiment of the present invention , in order to promote the rapid liquefaction of the vaporized first cooling medium 22 to return to the part of the first cooling medium 22 in the shell 21, the cooling device also includes a second heat exchange device 30, specifically, the second heat exchange device 30 includes filling There are cooling passages of the second cooling medium 33, cooling fins 32, second cooling medium coolers 34, and cooling fans 35, wherein the cooling passages and the second cooling medium coolers 34 are connected by pipelines to form a heat exchange circuit 30a, and the cooling device It also includes a circulation device 60 and a control valve 50 installed in the heat exchange circuit 30a.

The cooling channel is disposed in the heat exchange space 23 . In this embodiment, the cooling channel is specifically a cooling pipeline 31 , and the cooling pipeline 31 is filled with a second cooling medium 33 . In order to increase the heat exchange efficiency, the cooling pipeline 31 forms a multi-circuit loop structure through a curved structure. After bending, it forms a plurality of parallel pipelines arranged adjacent to each other at intervals, and a multi-section curved pipeline in which multiple parallel pipelines are connected by end-to-end connection. Finally, an inlet of the cooling pipeline 31 for fluid inflow is formed at one end of the curved structure, and an outlet of the cooling pipeline 31 for fluid outflow is formed at the other end. The cooling pipeline 31 can be made of metal materials with good thermal conductivity, for example, copper tubes, aluminum tubes and other materials can be used to form the above-mentioned curved structure by bending. The cooling pipeline 31 is installed close to the top wall of the housing 21 in the heat exchange space 23 , and the installed cooling pipeline 31 forms a plurality of gaps by arranging multiple sections of parallel pipelines at intervals. Of course, the cooling pipeline 31 may not be a pipeline with a curved structure. In other embodiments, the cooling pipeline 31 may only include multiple sections of parallel pipelines, and the multiple sections of parallel pipelines respectively form a plurality of inlets and a plurality of The outlets can be connected through other pipelines to form the inlet of the cooling pipeline 31 and the outlet of the cooling pipeline 31 .

In this embodiment, the cooling channel is the above-mentioned cooling pipeline 31 , but the embodiment of the present invention is not limited thereto. In other embodiments, the cooling passage can also be other structures capable of circulating the second cooling medium 33, for example, the cooling passage can be a rectangular shell structure whose interior is divided into multiple passages, or integrally formed on The layered structure at the top wall of the housing 21 and the like.

In one embodiment, the second heat exchange device 30 further includes a plurality of heat exchange fins 32 arranged in the heat exchange space 23, and the plurality of cooling fins 32 are connected to the inner side of the top wall of the housing 21 and face the heat exchange space. 23 , so that a plurality of heat exchange fins 32 are correspondingly arranged in the gaps formed between the multiple sections of parallel pipes of the cooling pipe 31 . And two adjacent heat exchanging fins 32 in the plurality of heat exchanging fins 32 respectively clamp the parallel pipeline part of the cooling pipeline 31 between them, so that through the plurality of heat exchanging fins 32 The cooling pipeline 31 is directly connected to the heat exchange space 23 . And by arranging the heat exchange fins 32 next to the cooling pipeline 31, the cooling pipeline 31 can exchange heat with the heat exchange fins 32 in real time through the second cooling medium 33 inside, thereby increasing the heat exchange space 23 The heat exchange area is increased, the liquefaction efficiency of the first cooling medium 22 is accelerated, and the cooling efficiency of the input-side wiring copper bar 41 and the output-side wiring copper bar 42 is improved.

Of course, the cooling pipeline 31 may not be connected and fixed in the heat exchange space 23 through the cooling fins 32. In other embodiments, the cooling pipeline 31 may also pass through other auxiliary brackets, such as crimping parts or clamping parts. etc., fixedly connected to the inner wall of the housing 21. In addition, the embodiment of the present invention does not limit the number of cooling pipelines 31. In other embodiments, the second heat exchange device 30 may also include multi-layer cooling pipelines 31, and the cooling pipelines 31 may also be adjacent to The side wall of the housing 21 is disposed adjacent to the top wall and the side wall of the housing 21 at the same time. In addition, the arrangement form of the cooling fins 32 in the embodiment of the present invention is not limited thereto. In other embodiments, the cooling fins 32 can also be integrated with the housing 21 , and can also be on the housing 21 Cooling fins 32 are provided on the side wall or the top wall and the side wall of the casing 21 to further increase the heat exchange area. In addition, the embodiment of the present invention does not limit the type of the cooling fin 32, which may be a fin with a solid structure or a fin with a hollow structure, as long as more contact surfaces can be formed by means of the fins, Therefore, the liquefaction efficiency of the vapor formed after the first cooling medium 22 is vaporized, that is, the cooling speed of the vapor can be increased, and the cooling efficiency of the cooling device can be improved.

The second cooling medium cooler 34 is disposed outside the electrical cabinet 10 and includes: a housing 341 , a second cooling medium 33 and cooling fins 342 . The casing 341 is also a box structure, which can be made of metal materials with good thermal conductivity, for example, it can be made of copper, aluminum, stainless steel or a composite material formed of copper and aluminum. The inner space of the casing 341 is used for storing the second cooling medium 33 and cooling the second cooling medium 33 , and the outer wall of the casing 341 is provided with cooling ribs 342 around its circumference. The second cooling medium 33 is preferably deionized water. Since the deionized water does not contain impurities, it will not cause corrosion to the inside of the system. The second cooling medium cooler 34 can transfer the heat of the second cooling medium 33 contained therein to the outside through the casing 341 , and the cooling efficiency of the second cooling medium cooler 34 can be further increased by providing cooling ribs 342 . Of course, the embodiment of the present invention does not limit the specific structure of the second cooling medium cooler 34. In other embodiments, the second cooling medium cooler 34 can also be a refrigerator. Correspondingly, the second cooling medium 33 can be Freon. By setting the second cooling medium cooler 34 as a refrigerator, freon can be used to perform gas-liquid conversion repeatedly, so as to continuously dissipate heat to the outside air.

According to an embodiment of the present invention, one or more cooling fans 35 may also be provided in the second heat exchange device 30, and preferably, the air outlets of the one or more cooling fans 35 are directed toward the second cooling medium cooler 34 And set close to the cooling fins 342 . Thus, when one or more cooling fans 35 are turned on, the casing 341 and the cooling fins 342 can be cooled, and then the second cooling medium 33 inside the casing 341 can be cooled. And the inlet and outlet of the second cooling medium cooler 34 communicate with the outlet and inlet of the cooling pipeline 31 respectively through a delivery pipeline (not shown) sealed and penetrated through the side wall of the electrical cabinet 10 to form a heat exchange circuit 30a, The circulation device 60 is disposed in the heat exchange circuit 30 a, so that the second cooling medium 33 can circulate in the heat exchange circuit 30 a and be continuously supplied from the second cooling medium cooler 34 to the cooling pipeline 31 . The embodiment of the present invention does not limit the circulation device 60, which may be a mechanism capable of promoting the circulation of the second cooling medium 33 in the heat exchange circuit 30a, for example: the circulation device 60 may be a circulation pump, a pressure pump, etc.

Thus, the second cooling medium 33 can transfer the heat of the first cooling medium 22 in the heat exchange space 23 to the second cooling medium cooler 34 for cooling by circulating in the heat exchange circuit 30 a. In one embodiment, one or more cooling fans 35 can also be properly controlled according to the temperature of the second cooling medium 33 in the second cooling medium cooler 34, so that the second cooling medium cooler 34 itself can When cooling the second cooling medium 33 , unnecessary power loss caused by starting the cooling fan 35 is avoided. At the same time, it can also avoid that the temperature of the second cooling medium 33 in the second cooling medium cooler 34 is too low, and then when the second cooling medium 33 circulates through the heat exchange circuit 30a, the temperature in the heat exchange space 23 is excessively reduced, causing the electrical The temperature inside the cabinet 10 is too low, which affects the normal operation of electrical components.

When working, the heat generated by the heat-generating electrical components will be directly transferred to the first cooling medium 22 around it, and the heat will continue to accumulate in the first cooling medium 22, and the heat will continue to accumulate in the first cooling medium 22, As a result, the temperature of the first cooling medium 22 rises until it reaches its boiling point (the boiling point is determined by the properties of the first cooling medium 22 itself, and the first cooling medium 22 can be selected according to actual needs), and the first cooling medium 22 will Vaporization occurs, and the liquid first cooling medium 22 evaporates to take away the heat generated by the heating electrical components, and rises into the heat exchange space 23 . Since the cooling pipeline 31 installed in the heat exchange space 23 has a second cooling medium 33 circulating in it, the cooling pipeline 31 can contact and exchange the steam of the first cooling medium 22 through the second cooling medium 33 inside it. hot. After the first cooling medium 22 transfers its heat to the second cooling medium 33 , it is liquefied to form a liquid first cooling medium 22 , which returns to the first cooling medium 22 in the housing 21 . And because the second cooling medium 33 continuously circulates in the heat exchange circuit 30a, the second cooling medium 33 after absorbing heat in the heat exchange space 23 can further transfer heat to the second cooling medium cooler 34, through Finally, cooling is performed by the second cooling medium cooler 34 . Furthermore, the heat exchange efficiency between the cooling pipeline 31 and the first cooling medium 22 is promoted, and the cooling efficiency of the cooling device on the input side wiring copper bar 41 and the output side wiring copper bar 42 inside the electrical cabinet 10 is improved, which can increase the stability of the electrical cabinet 10 sex and reliability. And because the cooling device of the embodiment of the present invention adopts the liquid first cooling medium 22 in the airtight electrical cabinet 10, the gas-liquid phase change circulation and the cooling pipeline 31 of the external second cooling medium cooler 34 are mutually independent structures. , so that the cooling device has good maintainability.

Of course, in other embodiments, the cooling fins 342 may not be disposed around the outer wall of the housing 341 , and the cooling ribs 342 may be partially disposed around the outer wall of the housing 341 , or disposed at the outer wall of the housing 341 along the longitudinal direction. In addition, the embodiment of the present invention does not limit the type of the cooling fin 342, which may be a fin with a solid structure or a fin with a hollow structure, as long as more contact surfaces can be formed by means of the fins. Therefore, the cooling speed of the second cooling medium 33 can be increased, and the cooling efficiency of the cooling device can be improved. In addition, the embodiment of the present invention does not limit the width and thickness of the cooling ribs 342 , so as to ensure that the second cooling medium cooler 34 can cool the second cooling medium 33 . Moreover, the cooling fins 342 and the housing 341 may be in an integral structure or in a separate structure. In addition, the form of the second cooling medium cooler 34 in other embodiments is the same as that of the above-mentioned housing 21 , so it will not be repeated here.

In an optional embodiment, the cooling device further includes a control valve 50, which is arranged in the heat exchange circuit 30a, and the opening degree of the control valve 50 can control the flow rate of the second cooling medium 33 circulating in the heat exchange circuit 30a. The cross-sectional flow rate is limited, and the flow rate of the second cooling medium 33 in the heat exchange circuit 30a can be appropriately controlled through the control valve 50 according to the temperature in the heat exchange space 23 of the cooling device. The embodiment of the present invention does not limit the type of the control valve 50, which may be various flow regulating valves. For example, the control valve 50 may adopt an angle control valve, a diaphragm control valve, a three-way control valve, an eccentric rotation control valve, and a sleeve type control valve. Wait. The flow rate of the second cooling medium 33 in the heat exchange circuit 30a can be reasonably controlled by the control valve 50, so that the first cooling medium 22 in the housing 21 can cool the heat-generating electrical components through its own heat exchange capacity , reduce the flow rate of the second cooling medium 33 in the heat exchange circuit 30a or stop the flow of the second cooling medium 33 in the heat exchange circuit 30a. Avoid causing unnecessary power loss, thereby increasing the service life of the device, and at the same time avoiding the continuous circulation of the second cooling medium 33 from causing the temperature in the heat exchange space 23 to be excessively reduced, so that the inside of the electrical cabinet 10 is at a too low temperature, Affect the normal work of electrical components.

Fig. 7 is a structural block diagram of a cooling system 100 for an electrical cabinet according to an embodiment of the present invention. As shown in Figure 7, according to an embodiment of the present invention, a cooling system 100 for an electrical cabinet is also provided, the cooling system 100 includes the above-mentioned cooling device, and also includes a first temperature sensor 71, a second temperature sensor 72 and the first control unit 81 and the first control unit 82. In addition, in order to facilitate the description of the connection relationship of the cooling system 100, a partial structure of the cooling device is also schematically shown in FIG. A heat exchange circuit 30a is formed between the second cooling medium coolers 34 outside the electrical cabinet 10, and a circulation device 60 and a control valve 50 are arranged in the heat exchange circuit 30a, and the circulation device 60 promotes the second cooling medium 33 to be able to exchange heat Circulating flow in loop 30a. In addition, the dotted line in the figure represents the signal connection between the two devices, and the solid line represents the physical connection or the circuit connection between the two devices.

The first temperature sensor 71 is disposed at the heat exchange space 23 in the electrical cabinet 10 , and is used to collect a first temperature in the heat exchange space 23 and send the first temperature to the first control unit 81 . Specifically, in this embodiment, the first temperature sensor 71 can be set in the heat exchange space 23 and adjacent to the heat exchange fins 32, and the first temperature collected by the first temperature sensor 71 can be the temperature of the heat exchange space 23. The temperature of the vapor formed by the vaporization of the first cooling medium 22 in the medium, or the temperature of the heat exchange fins 32 . Of course, the first temperature sensor 71 can also be directly arranged at the heat exchange fin 32 , and the first temperature collected at this time is the temperature of the heat exchange fin 32 . The temperature of the first cooling medium 22 inside the casing 21 can be indirectly reflected by collecting the temperature of the vapor formed by the vaporization of the first cooling medium 22 or the temperature of the heat exchange fins 32 . Of course, the first temperature sensor 71 can also directly collect the temperature of the first cooling medium 22 in the casing 21 .

A relationship curve between the first temperature and the flow rate of the second cooling medium 33 in the heat exchange circuit 30 a is pre-stored in the first control unit 81 . In this embodiment, a relationship curve between the first temperature and the flow rate of the second cooling medium 33 in the heat exchange circuit 30a can be constructed by using multiple sets of empirical values. It is also possible to obtain multiple sets of experimental data corresponding to the cooling temperature provided by the first cooling medium 22 and the flow rate of the second cooling medium 33 required by the heating electrical components inside the electrical cabinet 10 in actual work through multiple actual tests to construct the first cooling medium. The relationship curve between the temperature and the flow rate of the second cooling medium 33 in the heat exchange circuit 30a. In this relationship curve, the corresponding relationship between the first temperature and the flow rate of the second cooling medium 33 is: when the first temperature in the heat exchange space 23 rises, correspondingly, the second cooling medium 33 in the heat exchange circuit 30a The flow rate also increases accordingly. By constructing the relationship curve, after receiving the first temperature, the first control unit 81 can select the first temperature corresponding to the first temperature according to the relationship curve between the first temperature and the flow rate of the second cooling medium 33 in the heat exchange circuit 30a. the flow rate of the second cooling medium 33, and adjust the flow rate of the second cooling medium 33 in the heat exchange circuit 30a. In this embodiment, the first control unit 81 can control the shut-off volume of the second cooling medium 33 in the heat exchange circuit 30a by adjusting the valve opening degree of the control valve 50, so that the flow rate of the second cooling medium 33 in the heat exchange circuit can be controlled. The flow rate in 30a is reasonably controlled. When the first cooling medium 22 in the casing 21 can cool the heat-generating electrical components through its own heat exchange capacity, reduce the flow rate of the second cooling medium 33 in the heat exchange circuit 30a or make the flow rate of the second cooling medium 33 in the heat exchange circuit 30a The second cooling medium 33 stops flowing. Avoid causing unnecessary power loss and equipment loss, and at the same time, it can also prevent the temperature in the heat exchange space 23 from being excessively lowered by the second cooling medium 33 which circulates continuously, and then the temperature inside the electrical cabinet 10 is too low, which affects the electrical components. normal work.

The embodiment of the present invention does not limit the specific form of the first temperature sensor 71 , and the first temperature sensor 71 may be various sensors capable of collecting the first temperature. Moreover, the embodiment of the present invention does not limit the specific form of the first control unit 81 , and the first control unit 81 may be various types of control units capable of controlling the control valve 50 .

In an optional embodiment, the above-mentioned circulation device 60 can also be controlled by a controller, and the heat exchange circuit 30a can be controlled and opened through the circulation device 60 according to needs, that is, the second cooling medium 33 is in the heat exchange circuit 30a Circulating flow; or the circulation device 60 is used to control and shut down the heat exchange circuit 30a as required, that is, to stop the second cooling medium 33 from circulating in the heat exchange circuit 30a. Therefore, the controller can be communicated with the main control system of the wind generator, and the running state of the wind generator can be fed back to the controller through the main control system of the wind generator, so that the controller can control the wind power generator according to the running state of the wind generator. The circulation state of the second cooling medium 33 in the heat exchange circuit 30a is controlled. Exemplarily, by receiving the feedback information from the main control system of the wind generator, the controller can control the cycle device 60 to open when the wind generator is in the power generation state; The circulation device 60 is closed, or according to the temperature in the heat exchange space 23 in the electrical cabinet 10, the circulation device 60 is controlled to continue to run for a predetermined time before closing. By controlling the circulation device 60 with a controller connected to the main control system of the wind power generator, an information exchange channel between the cooling system 100 and the main control system of the wind power generator can be established. On the one hand, the main control system of the wind turbine feeds back the operation information of the wind turbine to the cooling system 100 to control the opening and closing of the second heat exchange device 30 (ie, the heat exchange circuit 30 a ). On the other hand, the control signal of the circulation device 60 can be fed back to the main control system of the wind power generator, so that the operation status of the cooling system 100 can be grasped in the central control room of the wind power generator, so as to realize information exchange, and provide a good foundation for the cooling system. maintenance basis.

The second temperature sensor 72 is disposed in the second cooling medium cooler 34 , and is used to collect a second temperature in the second cooling medium cooler 34 and send the second temperature to the second control unit 82 . Specifically, in this embodiment, the second temperature sensor 72 may be disposed at the inner wall of the second cooling medium cooler 34 or in the second cooling medium 33 , thereby collecting the temperature of the second cooling medium 33 .

The second control unit 82 is pre-stored with a preset temperature threshold. When the second control unit 82 receives the second temperature, it judges whether the second temperature is greater than the preset temperature threshold. If it is determined that the second temperature is greater than the preset temperature threshold, Then the second control unit 82 cools the second cooling medium 33 in the second cooling medium cooler 34 . In this embodiment, the preset temperature threshold may be an upper limit value determined based on empirical values and a specific application environment, or may be an upper limit value obtained based on actual experimental tests. For example, the upper limit of the temperature of the second cooling medium 33 in the second cooling medium cooler 34 allowed by the heat-generating electrical components in the electrical cabinet 10 during actual operation can be tested through experiments. Exemplarily, assuming that the preset temperature threshold is 60° C., when the second temperature received by the second control unit 82 is greater than 60° C., it is determined that the second cooling medium cooler 34 needs to be cooled. In this embodiment, the second control unit 82 controls the opening of one or more cooling fans 35 to cool the second cooling medium cooler 34 .

Since the cooling system 100 has the above-mentioned cooling device, it also has the same advantages as the cooling device, which will not be repeated here.

FIG. 8 is a flow chart of a cooling method according to an embodiment of the present invention. The cooling method for cooling an electrical cabinet of this embodiment will be described below based on the above-mentioned cooling system 100 . The cooling method in this embodiment includes the following steps.

Step 101: Collect the first temperature in the heat exchange space.

This step is a temperature detection step. The first temperature in the heat exchange space 23 is collected through the first temperature sensor 71 in the cooling system 100. The specific steps have been described in detail in the cooling system 100 above, so they will not be discussed here. To repeat.

Step 102: Adjust the flow rate of the second cooling medium according to the pre-stored relationship curve.

This step is a flow rate control step, and the first control unit 81 in the cooling system 100 prestores the relationship curve between the first temperature and the flow rate of the second cooling medium 33 in the heat exchange circuit 30a. After receiving the first temperature, the first control unit 81 adjusts the flow rate of the second cooling medium 33 in the heat exchange circuit 30a to the flow rate of the second cooling medium 33 corresponding to the first temperature according to the relationship curve. The specific steps have been described in detail in the cooling system 100 mentioned above, so they will not be repeated here.

FIG. 9 is a flow chart of a cooling method according to another embodiment of the present invention. The cooling method for cooling an electrical cabinet of this embodiment will be described below based on the above-mentioned cooling system 100 . The cooling method in this embodiment includes the following steps.

Step 201: Collect the second temperature in the second cooling medium cooler.

This step is a temperature detection step. The second temperature in the second cooling medium cooler 34 is collected by the second temperature sensor 72 in the cooling system 100. The specific steps have been described in detail in the cooling system 100 above. Therefore, it will not be repeated here.

Step 202: Determine whether the second temperature is greater than a preset temperature threshold, if yes, execute step 203; if not, execute step 201.

This step belongs to the cooling control step, and the preset temperature threshold is pre-stored in the second control unit 82 of the cooling system 100 . The second temperature is received by the second control unit 82, and it is judged whether the second temperature is greater than a preset temperature threshold. If yes, execute step 203 to cool the second cooling medium 33 . If not, step 201 is executed to continue collecting the second temperature in the second cooling medium cooler 34 .

Step 203: cooling the second cooling medium.

This step also belongs to the cooling control step. The cooling system 100 controls one or more cooling fans 35 to cool the second cooling medium 33 in the second cooling medium cooler 34 . The specific steps have been described in detail in the cooling system 100 mentioned above, so they will not be repeated here.

Fig. 10 is a schematic structural diagram of a wind power generator 1 according to an embodiment of the present invention. As shown in Fig. The machine switch cabinet 170 (that is, the above-mentioned electrical cabinet 10) and the above-mentioned cooling system 100 (not shown in the figure). The tower 110 is vertically arranged as an integral support, and the nacelle 120 is arranged on the upper end of the tower 110 . The generator 150 is arranged at the front end of the nacelle 120 , and the hub 130 on which the blades 140 are installed is arranged at the front end of the generator 150 . The generator switch cabinet 170 is arranged at the base 160 in the nacelle 120, and is arranged in an airtight manner, and contains a circuit breaker 40 (as shown in FIG. 1 ) inside. row (input-side wiring copper bar 41 and output-side wiring copper bar 42 shown in FIG. 1 ) and connecting terminals (not shown in the figure). Since the wind power generator has the cooling system 100 , it has the same advantages as the cooling system 100 , which will not be repeated here.

Of course, the cooling device, cooling system, and cooling method of the embodiments of the present invention can be applied not only to offshore wind power generators, but also to land-based wind power generators, and can also be applied to other wind power generators that require high cleanliness, In places with high heat flux density.

To sum up, the cooling device for the electrical cabinet of the embodiment of the present invention sets the first heat exchange device 20 and the second heat exchange device 30, so that the heating electrical components in the electrical cabinet 10 (that is, the input side wiring copper bar 41 and the output side) During the working process of the side wiring copper bar 42 , the heat generated will be transferred to the first cooling medium 22 . After the heat exchange between the first cooling medium 22 and the heat-generating electrical components, the heat continues to accumulate. When the heat rises to the boiling point of the first cooling medium 22, the first cooling medium 22 will be vaporized and evaporated, and part of the first cooling medium 22 will be converted into steam and evaporated. The heat in the liquid first cooling medium 22 is taken away and rises to the heat exchange space 23 . As the steam of the first cooling medium 22 in the heat exchange space 23 continues to accumulate, the heat in the heat exchange space 23 increases. Since the cooling pipeline 31 is provided in the heat exchange space 23, and the cooling pipeline 31 and the second cooling medium cooler 34 outside the electrical cabinet 10 constitute a heat exchange circuit 30a, the cooling pipeline 31 can pass through the The second cooling medium 33 circulating inside exchanges heat with the steam of the first cooling medium 22 in the heat exchange space 23, and then transfers the heat in the heat exchange space 23 to the second cooling medium cooler through the second cooling medium 33 At 34 , the heat is further transferred to the outside of the electrical cabinet 10 through the second cooling medium cooler 34 . Thus, the electrical cabinet 10 can be arranged in a hermetically sealed manner, so that the electrical cabinet 10 can be isolated from external air environments such as high humidity and salt spray, so that the internal electrical components can be protected from pollution and corrosion, and the improvement can be improved. This ensures the environmental adaptability of the electrical cabinet 10 in harsh external environments. At the same time, due to the liquid-cooled circulation heat exchange mode, the second heat exchange device 30 exchanges heat with the steam of the first cooling medium 22 in the heat exchange space 23, and the cooling effect is better than that of the air-cooled method, so the electrical cabinet can be The internal temperature of 10 is at a reasonable level, so that the heating electrical parts in the electrical cabinet 10 can obtain a good cooling effect. In addition, there is no need to provide a large-sized fan for electrical components with large heat generation, so it will not bring a burden to the design of the external dimensions of the large-capacity wind power generator. And by setting the first temperature sensor 71 and the first control unit 81, the control valve can be reasonably controlled, so that the electrical cabinet 10 can maintain a reasonable temperature and increase the service life of the device. Further, the cooling fan can be reasonably controlled by setting the second temperature sensor 72 and the second control unit 82, so that the cooling is started only when the second cooling medium 33 in the second cooling medium cooler 34 reaches a preset temperature threshold The fan 35 cools the second cooling medium 33 in the second cooling medium cooler 34, so as not to cause waste of energy.

The present invention may be embodied in other specific forms without departing from its spirit and essential characteristics. Therefore, the present embodiments are to be considered in all respects as illustrative rather than restrictive, the scope of the present invention is defined by the appended claims rather than the above description, and, within the meaning and equivalents of the claims, All changes in scope are thereby embraced within the scope of the invention. Moreover, different technical features in different embodiments can be combined to achieve beneficial effects. Those skilled in the art should be able to understand and implement other modified embodiments of the disclosed embodiments on the basis of studying the drawings, specification and claims.

Claims (16)

1. one kind is used for the cooling device of electrical cabinet (10), the mounted inside of the electrical cabinet (10) has fever electricity piece, special Sign is：The cooling device includes the first heat transmission equipment (20) and the second heat transmission equipment (30),

First cooling medium (22) of first heat transmission equipment (20) including housing (21,21a) and liquid, wherein：The shell Body (21,21a) is arranged on the inside of the electrical cabinet (10) and hermetically accommodates the first cooling medium (22) and described Generate heat electricity piece；The first cooling medium (22) occupies the part space interior of the housing (21,21a) with described first The surface for cooling down medium (22) forms heat transfer space (23,23a), also, the first cooling medium (22) and the hair Hot electricity piece electric insulation and the fever electricity piece can be submerged at least partly, so as to make to the fever electricity piece into The first cooling medium (22) of row cooling can be evaporated heat dissipation in the heat transfer space (23,23a)；

Cooling duct, second cooling medium cooling of second heat transmission equipment (30) including being filled with the second cooling medium (33) Device (34) and circulator (60), wherein：The cooling duct is arranged in the heat transfer space (23,23a), outlet and Entrance connects respectively with being set to described the second of the electrical cabinet (10) outside the entrance and exit for cooling down medium cooler (34) Logical, to form heat-exchanging loop (30a), the circulator (60) is arranged in the heat-exchanging loop (30a), so that described second Cooling medium (33) can circulate in the heat-exchanging loop (30a) so that cooling duct can be situated between by the second cooling Heat in matter (33) exchange heat space (23,23a) is cooled down.

2. cooling device according to claim 1, which is characterized in that the cooling duct is cooling line (31), described Cooling line (31) includes multistage spaced apart parallel cartridges adjacent to each other.

3. cooling device according to claim 2, which is characterized in that second heat transmission equipment (30) further includes multiple change Hot fin (32), the multiple heat exchange fin (32) are respectively disposed in the gap that the multistage parallel cartridges are formed each other In.

4. according to the cooling device described in any one described in claim 1-3, which is characterized in that second cooling is situated between The periphery wall of matter cooler (34) is provided with cooling fin (342).

5. according to the cooling device described in any one in claim 1-4, which is characterized in that second heat transmission equipment (30) The control valve (50) being arranged in the heat-exchanging loop (30a) is further included, it can be to being changed described by the control valve (50) The flow velocity of the second cooling medium (33) circulated in hot loop (30a) is controlled.

6. according to the cooling device described in any one in claim 1-4, which is characterized in that second heat transmission equipment (30) One or more cooling fan (35) is further included, it can be to described the in the described second cooling medium cooler (34) Two cooling media (33) are cooled down.

7. one kind is used for the cooling system (100) of electrical cabinet (10), which is characterized in that the cooling system (100) includes：Such as power Profit requires cooling device, the first temperature sensor (71) and the first control unit (81) described in 1,

First temperature sensor (71) is set in the heat transfer space (23,23a), for acquiring the heat transfer space The first temperature in (23,23a), and first temperature is sent to first control unit (81)；

Described the be previously stored in first control unit (81) in first temperature and the heat-exchanging loop (30a) The relation curve of the flow velocity of two cooling media (33), first control unit (81) can receive first temperature, and root The flow velocity of the second cooling medium (33) in the heat-exchanging loop (30a) is adjusted according to the relation curve.

8. cooling system (100) according to claim 7, which is characterized in that the cooling system (100) further includes setting Control valve (50) in the heat-exchanging loop (30a), the control valve (50) can be according to first control units (81) Control to circulated in the heat-exchanging loop (30a) it is described second cooling medium (33) flow velocity control.

9. one kind is used for the cooling system (100) of electrical cabinet (10), which is characterized in that the cooling system (100) includes：Such as power Profit requires cooling device, second temperature sensor (72) and the second control unit (82) described in 1,

The second temperature sensor (72) is set in the second cooling medium cooler (34), for acquiring described second The second temperature in medium cooler (34) is cooled down, and the second temperature is sent to second control unit (82)；

Second control unit (82) can receive the second temperature, and judge whether the second temperature is more than default temperature Threshold value is spent, if it is determined that the second temperature is more than the preset temperature threshold, then second control unit (82) is to described the The second cooling medium (33) in two cooling medium coolers (34) is cooled down.

10. cooling system (100) according to claim 9, which is characterized in that the cooling system (100) further includes one A or more than one cooling fan (35), one or more than one cooling fan (35) can be according to the described second controls The control of unit (82) processed cools down the second cooling medium (33) in the described second cooling medium cooler (34).

11. a kind of wind-driven generator (1), which is characterized in that including such as claim 7 to 10 any one of them cooling system (100), wherein, the electrical cabinet (10) is set with being hermetically sealed.

12. wind-driven generator (1) according to claim 11, which is characterized in that the electrical cabinet (10) is opened for generator Close cabinet (170).

13. a kind of cooling means cooled down using cooling system as claimed in claim 7 (100) to electrical cabinet (10), special Sign is that the cooling means includes：

Temperature detection step acquires the first temperature in the heat transfer space (23,23a)；

Flow controlling step prestores first temperature and the second cooling medium in the heat-exchanging loop (30a) (33) relation curve of flow velocity, and adjust described second in the heat-exchanging loop (30a) according to the relation curve and cool down The flow velocity of medium (33).

14. cooling means according to claim 13, which is characterized in that in the flow controlling step, pass through control Valve (50) controls the flow velocity of the second cooling medium (33) circulated in the heat-exchanging loop (30a).

15. a kind of cooling means cooled down using cooling system as claimed in claim 9 (100) to electrical cabinet (10), special Sign is that the cooling means includes：

Temperature acquisition step, acquisition described second cool down the second temperature in medium cooler (34)；

Rate-determining steps are cooled down, judge whether the second temperature is more than preset temperature threshold, if it is determined that the second temperature is more than The preset temperature threshold then carries out the second cooling medium (33) in the described second cooling medium cooler (34) cold But.

16. cooling means according to claim 15, which is characterized in that in the cooling rate-determining steps, pass through one Or more than one cooling fan (35) is to the second cooling medium (33) in the described second cooling medium cooler (34) It is cooled down.