KR101900454B1 - Accumulator integrated receiver assembly of heat recovery system from waste water - Google Patents

Abstract

The present invention relates to a volume variable unit for varying an internal volume of a liquid case while ascending or descending according to an amount of liquid refrigerant flowing into an inside of a liquid case through an inlet relay pipe provided in a liquid case of a liquid separating and integrating type receiver; And a plurality of piezoelectric elements mounted on one side of the fluid case, wherein a load of the liquid refrigerant introduced into the fluid case is connected to the volume variable unit to convert the load into electrical energy, And a power generation unit for supplying the power to the receiver, wherein the power generation unit includes a power generation unit for supplying power to the power generation unit, The present invention relates to a liquid separator integrated type liquid receiver assembly.

Description

TECHNICAL FIELD [0001] The present invention relates to a liquid separator integrated receiver assembly for a waste water heat recovery system,

[0001] The present invention relates to a liquid separator integrated receiver assembly for a waste water heat recovery system, and more particularly, to a liquid separator integrated receiver assembly in which a volume of an interior of a receiver is varied according to an amount of refrigerant flowing into a receiver, The present invention relates to a liquid separator integrated receiver assembly of a wastewater heat recovery system.

In a facility using a lot of hot water such as a bathroom or a sauna, a waste water heat recovery system is used to recover the residual heat before discharging the waste water.

In order to recover the residual heat from the wastewater, a heat pump that recovers heat from the wasted hot water and heats the water before use is required. The heat pump includes a receiver and a liquid separator capable of mutual heat exchange between the low temperature gas refrigerant and the high temperature liquid refrigerant need.

The liquid receiver is a container which is provided between the condenser and the expansion valve to temporarily store the high temperature and high pressure refrigerant liquid liquefied in the condenser, and the liquid separator is provided between the compressor and the evaporator to prevent the liquid from being mixed into the gas sucked into the compressor .

Conventionally, a liquid receiver and a liquid separator provided in a heat pump are generally provided separately.

However, when the receiver and the liquid separator are installed in separate pipelines, the structure of the heat pump becomes complicated, and the refrigerant liquid separated from the vapor in the liquid separator is conveyed, resulting in a problem that the refrigerating efficiency is lowered.

In order to prevent such a problem, an integral type liquid receiver in which a liquid separator is provided in a receiver such as a "liquid separator for combined use with a refrigeration cycle receiver" (hereinafter referred to as "prior art") of Registration Practice No. 20-0134978 is proposed.

However, the prior art has a limitation in completely solving the problem that the vapor state refrigerant is introduced into the compressor in the receiver.

Particularly, the prior art including a general receiver has a problem in that it can not actively cope with a change in refrigerant circulation amount due to a refrigeration load since the internal capacity of the receiver is fixed.

Registration Practical No. 20-0134978

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problem, and it is an object of the present invention to provide a refrigeration system capable of changing the volume inside a receiver according to an amount of refrigerant flowing into a receiver, To provide a liquid separating integral type receiver assembly for a liquid separation system.

In order to achieve the above object, the present invention provides a liquid container comprising a liquid case, a liquid separation case provided on the upper side of the liquid case, an inlet pipe having one end connected to the evaporator and the other end connected to the inside of the liquid separation case, An outlet tube having one end connected to the compressor and the other end connected to the inside of the liquid separation case, an inlet relay tube having one end connected to the condenser and the other end connected to the inside of the liquid case, And a discharge relay tube whose other end communicates with the interior of the liquid case; A volume varying unit for varying an internal volume of the liquid case while raising and lowering the liquid refrigerant through the inflow relay pipe according to an amount of the liquid refrigerant introduced into the liquid case; And a plurality of piezoelectric elements mounted on one side of the fluid case, wherein a load of the liquid refrigerant introduced into the fluid case is connected to the volume variable unit to convert the load into electrical energy, The present invention can provide a liquid separator integral type liquid receiver assembly of a wastewater heat recovery system, which includes a power generation unit that supplies all of the power generation units.

The volume varying unit may include an extension housing extending from a bottom surface of the liquid separation case toward a bottom surface side of the liquid storage case and opened at a bottom surface thereof and disposed at a lower portion of the extension housing in the liquid storage case, And a lifting plate that moves up and down according to an amount of liquid refrigerant flowing into the liquid case through the relay pipe and contacts or separates from a lower edge of the extended housing, As shown in Fig.

At this time, the volume varying unit further includes a biasing means disposed between the bottom surface of the lifting plate and the bottom surface of the inside of the liquid case to generate a force for pushing up the lifting plate to the extending housing side and allowing elastic deformation And the plurality of piezoelectric elements are disposed on both upper and lower ends of the lifting plate and the biasing means, respectively.

The power generation unit may further include a storage battery electrically connected to the plurality of piezoelectric elements and having a charge and discharge circuit for storing and using electrical energy produced from the plurality of piezoelectric elements, And are electrically connected to each other.

The liquid separation case is disposed inside the liquid separation case and delays the flow of the refrigerant flowing into the liquid separation case through the introduction pipe toward the outflow tube, And a flow restricting portion for increasing the heat exchange efficiency with the refrigerant.

According to the present invention having the above-described configuration, the following effects can be achieved.

The present invention relates to a liquid container comprising a liquid case, a liquid separation case provided on the upper side of the liquid case, an inlet pipe having one end connected to the evaporator and the other end connected to the inside of the liquid separation case, An outlet pipe communicating with the inside of the liquid separation case; an inlet relay pipe having one end connected to the condenser and the other end connected to the inside of the liquid case; an outlet relay connected to the expansion valve at one end, A liquid separating and collecting type fluid containing tube; A volume variable unit for varying an internal volume of the liquid case while ascending or descending according to an amount of the liquid refrigerant flowing into the liquid case through the inlet relay pipe; And a plurality of piezoelectric elements mounted on one side of the liquid case and connected to the volume variable unit to convert the load of the liquid refrigerant flowing into the liquid case into electric energy to supply the compressor with a part or all of the operating power of the compressor The volume of the inside of the receiver can be varied according to the amount of refrigerant flowing into the receiver, so that it is possible to positively cope with the refrigerating load variable into a single device.

The volume variable unit according to the present invention comprises an extension housing extending from a bottom surface of a liquid separation case toward a bottom surface side of the liquid storage case and having a bottom opened, And a plurality of piezoelectric elements are arranged on the lower side of the lifting plate and the lifting plate so that the liquid refrigerant flows into the liquid housing through the lifting plate and the lifting plate, , The volume of the liquid case can be varied to positively cope with the change in the refrigerant circulation amount according to the refrigerating load, and thus it becomes possible to operate a stable waste water heat recovery system.

The volume variable unit according to the present invention further includes a biasing means disposed between the bottom surface of the lifting plate and the bottom surface of the liquid case to generate a force for pushing up the lifting plate to the extending housing side and permitting elastic deformation And a plurality of piezoelectric elements are disposed at the lower end portions of the lifting plate and the biasing means, respectively, so that a stable wastewater heat recovery system can be operated stably corresponding to minute changes of the frozen load varying instantaneously.

The power generation unit according to the present invention further includes a battery having a charge and discharge circuit electrically connected to the plurality of piezoelectric elements and storing and using electric energy produced from the plurality of piezoelectric elements, Thereby providing a part or all of the movable energy of the compressor requiring power, thereby reducing the operating load of the entire system, thereby enabling efficient system operation.

According to another aspect of the present invention, there is provided a liquid separating apparatus, comprising: a liquid separator provided in a liquid separating case, delaying a flow of refrigerant flowing into an interior of a liquid separating casing through an inlet pipe, So that the liquid refrigerant, which is partially contained in the gaseous refrigerant introduced from the evaporator, is heat-exchanged with the refrigerant introduced from the condenser before passing through the pipe connected to the compressor, The refrigerant is prevented from flowing into the compressor, and when the refrigerant condensed in the receiver is evaporated to be in a gaseous state, the refrigerant flows into the compressor again, thereby maintaining the durability and improving the efficiency of the heat pump.

1 is a conceptual diagram illustrating the overall structure of an integrated receiver assembly according to an embodiment of the present invention;
Fig. 2 is an enlarged view of a portion II in Fig. 1. Fig. 2 is a conceptual view showing an operating state of a volume variable unit which is a main part of the present invention
3 is a view showing a schematic configuration of a waste water heat recovery system according to an embodiment of the present invention;

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings.

However, the present invention is not limited to the embodiments described below, but may be embodied in various other forms.

The present embodiments are provided so that the disclosure of the present invention is thoroughly disclosed and that those skilled in the art will fully understand the scope of the present invention.

And the present invention is only defined by the scope of the claims.

Thus, in some embodiments, well known components, well known operations, and well-known techniques are not specifically described to avoid an undesirable interpretation of the present invention.

In addition, throughout the specification, like reference numerals refer to like elements, and the terms (mentioned) used herein are intended to illustrate the embodiments and not to limit the invention.

In this specification, the singular forms include plural forms unless the context clearly dictates otherwise, and the constituents and acts referred to as " comprising (or having) " do not exclude the presence or addition of one or more other constituents and actions .

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs.

Also, commonly used predefined terms are not ideally or excessively interpreted unless they are defined.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a conceptual view showing the overall structure of an integrated receiver assembly 100 according to an embodiment of the present invention.

FIG. 2 is an enlarged view of part II of FIG. 1, and is a conceptual view showing an operating state of the volume variable unit 200 which is a main part of the present invention.

3 is a diagram showing a schematic configuration of a waste water heat recovery system according to an embodiment of the present invention.

First, referring to FIG. 3, a description will be made of a waste water heat recovery system according to an embodiment of the present invention.

When hot water is discharged from the sauna 10 or the like, it is collected by the waste heat collecting device 20.

The hot water collected at the high temperature is heated by the heat exchange system in the cold water tank 30 and then sent to the wastewater tank 50. The warm water is supplied from the water tank 30 and heated by the wastewater heat collector 20 Water is sent to the hot water tank 40 and reused.

At this time, if necessary, the water in the hot water tank 40 is heated to a desired temperature by the hot water boiler 45 and then supplied to the hot water distributor 43 through the hot water distributor 43 where hot water is required.

On the other hand, the water in the wastewater tank 50 recovers heat using a heat pump.

That is, the water in the wastewater tank 50 passes through the evaporator 70 and is returned to the wastewater tank 50 after the evaporation tube provided in the evaporator 70 is heat- The recovered heat is discharged from the heat pump 60 to heat the surrounding water.

A known method of exchanging heat with the refrigerant flowing through the inside of the evaporation pipe is applied. The water flowing around the heat pump 60 may be cold water supplied separately or may be passed through the waste water heat recovery unit 20 described above, And the heated water is supplied to the hot water tank 40 again.

The waste water having passed through the evaporator 70 and having lost its heat is finally discharged to the discharge tank 90 and then discharged again after the water in the low-temperature tank tank 30 is further heated.

The present invention will focus on the liquid separating integral type receiver 100 among the heat pump 60 connected to the evaporator 70 used in the waste water heat recovery system having the above-described structure or a similar structure.

Referring to FIG. 1, a heat pump according to the present invention includes an evaporator, an expansion valve, a compressor, and a condenser. In the figure, a receiver 100 and a liquid separator are integrally provided between the evaporator, the expansion valve, And a liquid separating and collecting unit (100) constructed as described above.

1 and 2, it can be understood that the present invention is largely a structure including the integrated type receiver 100, the volume variable unit 200, and the power generation unit 300.

The liquid separating and collecting type liquid receiver 100 includes a liquid case 110, a liquid separating case 150 provided on the upper side of the liquid case 110, and a liquid separating case 150 having one end connected to the evaporator and the other end connected to the liquid separating case 150 An outlet pipe 165 having one end connected to the compressor and the other end connected to the inside of the liquid separating case 150, and an outlet pipe 165 having one end connected to the condenser and the other end connected to the liquid case 110, And an exhaust relay pipe 115 having one end connected to the expansion valve and the other end connected to the interior of the liquid case 110. [

The volume variable unit 200 varies the internal volume of the liquid case 110 while ascending and descending according to the amount of the liquid refrigerant flowing into the liquid case 110 through the inlet relay pipe 113.

The power generation unit 300 includes a plurality of piezoelectric elements 301 mounted on one side of the fluid case 110 and is connected to the volume variable unit 200 so that the load of the liquid phase refrigerant flowing into the fluid case 110 Into electrical energy and supplies it to some or all of the compressor operating power.

The liquid case 110 is formed of a hollow hollow cylinder and has a structure in which the upper part and the lower part are sealed in a dome shape.

The structure of the fluid case 110 is a structure that is generally used to withstand pressure in a pressure vessel.

Since the refrigerant is temporarily stored in the liquid case 110, the structure described above is preferably used, but is not limited thereto.

The function of the fluid case 110 and the flow of the refrigerant in the fluid case 110 will be described later in more detail.

The inflow relay pipe 113 and the discharge relay pipe 115 are connected to the outer surface of the fluid case 110.

One end of the inlet relay pipe 113 is connected to the condenser and the other end is connected to any part of the outer surface of the fluid case 110 so that the low temperature liquid refrigerant flows from the condenser into the fluid case 110 .

In the preferred embodiment of the present invention, the inflow relay tube 113 is provided on the upper side of the fluid case 110.

One end of the discharge relay pipe 115 is connected to the expansion valve and the other end of the discharge relay pipe 115 is connected to any part of the outer surface of the fluid case 110.

So that the refrigerant in the fluid case 110 is supplied to the expansion valve. In the preferred embodiment of the present invention, the discharge relay pipe 115 is provided on the lower side of the fluid case 110, and is provided on the opposite side of the inflow relay pipe 113 described above.

The liquid separation case 150 is provided inside the liquid case 110, and is preferably provided at an inner upper portion of the liquid case 110 as shown in the figure.

This configuration is configured to easily fix the liquid separation case 150 to the liquid case 110 and to easily connect the inflow pipe 163 and the outflow pipe 165 to each other so that the above- The present invention is not necessarily limited to the structure shown in the drawings, and can be designed in various known structures.

The liquid separation case 150 is separated from the liquid case 110 to form a separate space.

That is, the refrigerant passing through the liquid case 110 and the refrigerant passing through the liquid separation case 150 are not mixed with each other.

The liquid separation case 150 is connected to the inflow pipe 163 and the outflow pipe 165.

One end of the inflow pipe 163 is connected to the evaporator and the other end is connected to the inside of the liquid separation case 150 so as to extend by a predetermined length.

Thus, the low-temperature, low-pressure gaseous refrigerant generated in the evaporator flows into the liquid separation case 150 through the inlet pipe 163.

In the preferred embodiment of the present invention, the inflow pipe 163 is provided so as to extend partly inside the upper part of the liquid separation case 150.

One end of the outflow pipe 165 is connected to the compressor, and the other end is connected to the inside of the fluid case 110.

In the preferred embodiment of the present invention, the outflow pipe 165 is provided so as to extend to an inner lower portion of the liquid separation case 150 and is spaced apart from the bottom surface of the liquid separation case 150 so as to prevent the end thereof from being clogged. So that the outlet pipe 165 is not blocked even if the end of the outlet pipe 165 touches the bottom surface of the liquid separation case 150.

A first refrigerant flow path 167 is provided outside the outflow pipe 165.

The first refrigerant flow path 167 is configured such that an upper portion thereof is opened and a lower end portion thereof is closed. The body is formed to have a shape corresponding to that of the outflow pipe 165, and is formed to be somewhat larger than the outflow pipe 165.

The outlet pipe 165 is inserted into the open upper portion of the first refrigerant flow path 167 so that the end portion of the outlet pipe 165 is spaced apart from the bottom surface of the first refrigerant flow path 167 by a predetermined distance And a space is formed between the outer surface of the outlet pipe (165) and the inner surface of the first refrigerant flow path (167).

The refrigerant flowing into the inlet pipe 163 enters the upper portion of the first refrigerant passage 167 and passes between the first refrigerant passage 167 and the outlet pipe 165 and then flows into the inlet pipe 163 Structure.

In the preferred embodiment of the present invention, the other end of the inflow pipe 163 described above is provided at a lower position of the upper end of the first refrigerant passage 167.

Thus, the liquid refrigerant contained in the vapor state is prevented from flowing directly into the upper portion of the first refrigerant flow path 167.

The heat exchanging part 170 is further provided on the outer circumferential surface of the liquid separating case 150 in order to facilitate heat exchange between the refrigerant passing through the liquid case 110 and the refrigerant passing through the liquid separating case 150 have.

The heat exchanging part 170 may be formed by various known methods.

For example, although not shown in the drawing, a plurality of plate-shaped heat exchange plates (not shown) may be provided along the longitudinal direction of the outer peripheral surface of the liquid separation case 150.

However, in a preferred embodiment of the present invention, the heat exchanging part 170 has a plurality of cylindrical openings at both ends thereof along the outer circumferential surface of the liquid separation case 150.

That is, a cylindrical heat exchanger 170 having a predetermined length and hollow inside is provided along the outer surface.

The refrigerant passing through the liquid case 110 passes through the inside of the heat exchanging part 170 as well as the inside of the heat exchanging part 170 so that heat exchange is actively performed between the liquid case 110 and the liquid separating case 150.

In such a configuration, the gas phase refrigerant flows into the liquid separation case 150 through the inlet pipe 163.

At this time, the gaseous refrigerant flowing past the evaporator contains a small amount of liquid refrigerant in the form of mist.

However, when liquid refrigerant enters the compressor, liquid compression may occur and the compressor may be damaged.

Therefore, it is necessary to separate a small amount of liquid refrigerant contained in the gaseous refrigerant supplied from the evaporator.

The refrigerant flowing through the inlet pipe 163 does not directly enter the compressor through the outlet pipe 165 and the relatively heavy liquid refrigerant flows down to the bottom of the liquid separating case 150 and only the relatively light gaseous refrigerant 1 refrigerant flow path 167 as shown in Fig.

Since the low-temperature liquid refrigerant passes through the liquid separating case 150, the liquid refrigerant in a mist state of the refrigerant flowing into the liquid separating case 150 immediately condenses on the wall surface of the liquid separating case 150.

When the liquid refrigerant vaporizes, it enters the first refrigerant flow path 167 again.

Since the inflow pipe 163 extends to a position lower than the first refrigerant flow path 167, the refrigerant containing the liquid refrigerant introduced through the inflow pipe 163 directly enters the first refrigerant flow path 167 It is possible to prevent as much as possible.

That is, the liquid separation case 150 serves as a liquid separator of the refrigeration apparatus.

The refrigerant in the gaseous phase entering the first refrigerant moving path 167 is discharged through the outlet pipe 165 and then converted into the low temperature liquid refrigerant through the compressor and the condenser and enters the fluid case 110.

The refrigerant entering the fluid case 110 is temporarily stored and supplied to the evaporator as needed.

That is, the liquid case 110 functions as a liquid separating and integrating type receiver 100 in the refrigeration apparatus.

In the meantime, the liquid separating and collecting type fluid receiver 100 according to the present invention is further provided with at least one, preferably a plurality of second refrigerant flow paths 180 in the vertical direction on the inner wall of the liquid separation case 150 .

Further, a curtain 190 is further provided on the upper portion of the second refrigerant flow path 180.

The liquid separator integrated type receiver 100 according to the present invention is provided at a position lower than the other end of the inlet pipe 163 described above as the upper ends of the first refrigerant flow path 167 and the second refrigerant flow path 180.

The curtain wall 190 is provided so as to completely isolate the first and second refrigerant flow paths 167 and 180 and the inflow pipe 163 from each other. As shown in Fig.

The lower end of the second refrigerant flow path 180 is spaced apart from the lower end of the liquid separation case 150.

In this case, the gaseous refrigerant introduced through the inlet pipe 163 can not be directly lowered by the slurry 190, and the second refrigerant passage 180, which passes through the sloughing membrane 190, Lt; / RTI >

At this time, the second refrigerant flow path 180 is provided on the inner wall of the liquid separating case 150, and since the low-temperature liquid refrigerant passes through the liquid separating case 150, the refrigerant in the vapor state passes therethrough The liquid refrigerant condenses on the wall surface of the second refrigerant flow path 180.

The gaseous refrigerant that has passed through the second refrigerant transfer path 180 flows into the liquid separating case 150 and then rises again and flows into the upper portion of the first refrigerant transfer path 167.

From the first refrigerant flow path 167 to the compressor through the same path as the above-described path. So that the liquid refrigerant can be prevented from flowing into the compressor.

The volume variable unit 200 includes a lifting plate 220 extending from the lower surface of the liquid separation case 150 toward the bottom surface of the liquid storage case 110, do.

The lifting plate 220 is disposed in the lower portion of the extending housing 210 in the liquid housing 110 and moves up and down according to the amount of the liquid refrigerant flowing into the liquid housing 110 through the inlet relay tube 113, Or contact with the lower edge of the extension housing 210.

Here, it is understood that the plurality of piezoelectric elements 301 are disposed on the lower side of the lifting plate 220 and the lifting plate 220.

The volume variable unit 200 includes a curved surface portion 221 formed on the lifting plate 220 so as to correspond to a bottom surface shape of the convex fluid case 110 that is convex downward, The liquid housing 220 may further include a flow hole 212 penetrating the outer circumferential surface of the extension housing 210 so that the liquid refrigerant in the extension housing 210 may flow out into the liquid housing 110 when the liquid housing 220 contacts the housing 221.

The upper surface of the lift plate 220 is preferably larger than the lower surface of the extension housing 210.

The reason why the area of the upper surface of the lifting plate 220 is larger than the area of the lower surface of the elongate housing 210 is that the amount of the liquid refrigerant flowing from the inflow relay pipe 113 into the liquid case 110 increases, It is necessary to provide a pressure receiving area for lowering the pressure according to the pressure.

The turbulence shaping piece 210 protruding from the upper surface of the lifting plate 220 and accommodated in the extended housing 210 and having a length smaller than or equal to the distance from the upper end to the lower end of the extending housing 210 222 may be further provided.

The turbulent flow forming member 222 is formed such that the amount of the liquid refrigerant introduced into the fluid receiving case 110 from the inflow relay pipe 113 is increased so that the lifting plate 220 that has been in contact with the lower end of the extending housing 210 is lowered The liquid refrigerant that is opened to the outflow relay side opens the inner space of the extension housing 210 and generates turbulence around the inside and outside of the extension housing 210 and around the turbulence forming piece 222, It can be said that it is a technical means provided for sufficient heat exchange with the refrigerant.

The volume variable unit 200 is disposed between the bottom surface of the lifting plate 220 and the bottom surface of the inside of the liquid housing 110 to generate a force for pushing up the lifting plate 220 toward the extending housing 210, It may further comprise a biasing means 230 for allowing deformation.

Here, the plurality of piezoelectric elements 301 may be disposed at both upper and lower ends of the lift plate 220 and the biasing means 230, respectively.

At this time, the biasing means 230 may adopt a coil spring having an elastic force in a vertical direction and an elastic restoring force.

The biasing means 230 includes a lower spring seat 223 on the bottom surface of the lift plate 220 and a lower spring seat 112 formed on the bottom surface of the inside of the fluid case 110 so that the upper and lower ends of the biasing means 230 can be stably fixed. An upper end portion and a lower end portion may be accommodated in the upper end portion.

The biasing means 230 may be provided on the lower surface of the lifting plate 220 or the lower surface of the lifting plate 220 so as to reduce fluctuations of the biasing means 230 when the lifting plate 220 is vertically elastically deformed. A rod protruding from the bottom surface of the inside of the fluid case 110 and a bottom surface of the inside of the fluid case 110 or a cylinder protruding from the bottom surface of the lift plate 220, .

The power generation unit 300 further includes a battery 300 having a charge and discharge circuit electrically connected to the plurality of piezoelectric elements and storing and using electrical energy produced from the plurality of piezoelectric elements, Is electrically connected to the compressor.

In addition, in the present invention, the liquid separation case 150 is further provided with a fluid retentive member to delay the flow of the refrigerant flowing into the liquid separation case 150 through the inflow pipe 163 toward the outflow pipe 165 side And the heat exchanging efficiency with the liquid refrigerant introduced into the liquid case 110 through the inlet relay tube 113. [

It can be seen that the fluid retention portion is a structure including the first and second refrigerant flow paths 167 and 180 and the covering layer 190.

The description of the first and second refrigerant flow paths 167 and 180 and the curtain wall 190 is as described above, and therefore, a description thereof will be omitted for the sake of convenience.

Accordingly, if the refrigerant circulation amount of the entire waste water heat recovery system increases with the increase of the refrigeration load, the inflow amount of the liquid refrigerant flowing into the liquid case 110 of the liquid separating integral type receiver 100 will also increase.

Accordingly, when the refrigerant circulation amount is not large, the curved surface portion 221 of the lifting plate 220 may be in contact with or close to the lower end of the extending housing 210 as shown in FIG. 2 (a).

Thereafter, when the refrigerant circulation amount is increased and a load of the liquid coolant is applied, the lifting plate 220 will descend and move away from the extending housing 210 as shown in FIG. 2 (b).

A plurality of piezoelectric elements 301 disposed on the upper surface of the steel plate 220 will produce electrical energy when the steel plate 220 descends.

The piezoelectric elements 301 received and placed on the upper and lower spring seats 223 and 112 will produce electrical energy from the pressure due to the elastic repulsive force of the biasing means 230.

Therefore, the electric energy produced by the plurality of piezoelectric elements 301 according to the behavior of the lifting plate 220 as shown in FIG. 2 may be supplied to a place where electric power is required in the other waste water heat recovery system including a compressor to be.

Hereinafter, the operation and effect of the liquid separation unit type liquid receiver assembly of the wastewater heat recovery system according to the preferred embodiment of the present invention will be described as follows.

The liquid separation case 150 is provided at the upper side of the liquid case 110. The liquid separation case 150 has one end connected to the evaporator and the other end connected to the inside of the liquid separation case 150 An outlet pipe 165 having one end connected to the compressor and the other end connected to the inside of the liquid separating case 150 and one end connected to the condenser and the other end connected to the inside of the liquid case 110 And a discharge relay pipe (115) having one end connected to the expansion valve and the other end connected to the interior of the fluid case (110); A volume changing unit 200 for changing the internal volume of the liquid case 110 while ascending or descending according to an amount of liquid refrigerant flowing into the liquid case 110 through the inlet relay pipe 113; And a plurality of piezoelectric elements 301 mounted on one side of the liquid case 110. The load of the liquid refrigerant flowing into the fluid case 110 is converted into electrical energy by being connected to the volume variable unit 200 And a power generation unit (300) for supplying a part or all of the operating power of the compressor to the refrigerator, wherein a volume of the interior of the receiver is varied according to an amount of refrigerant flowing into the receiver, It will be able to actively respond.

The volume variable unit 200 according to the present invention includes an extension housing 210 extending from the lower surface of the liquid separation case 150 toward the bottom surface side of the liquid case 110 and having a lower surface opened, The liquid refrigerant flows into the liquid case 110 through the inlet relay pipe 113 and flows upward and downward along the lower end edge of the extension housing 210, And the plurality of piezoelectric elements 301 are arranged on the lower side of the lifting plate 220 and the lifting plate 220 to vary the volume of the liquid housing 110 It is possible to positively cope with the change in the refrigerant circulation amount according to the refrigeration load, so that it becomes possible to operate a stable waste water heat recovery system.

The volume variable unit 200 according to the present invention is disposed between the bottom surface of the lifting plate 220 and the bottom surface of the inside of the liquid storage case 110 so that the force for pushing up the lifting plate 220 toward the extending housing 210 And a plurality of piezoelectric elements 301 are disposed at the lower ends of the lifting plate 220 and the biasing means 230 so that the freezing It is possible to flexibly cope with minute changes of the load and to operate a stable wastewater heat recovery system.

The power generation unit 300 according to the present invention further includes a battery 300 having a charge and discharge circuit electrically connected to the plurality of piezoelectric elements and storing and using electrical energy produced from the plurality of piezoelectric elements And the battery 300 are electrically connected to the compressor, thereby providing a part or all of the movable energy of the compressor requiring power, thereby reducing the operating load of the entire system, thereby enabling efficient system operation.

In addition, according to the present invention, the flow of refrigerant flowing into the liquid separation case 150 through the inlet pipe 163 toward the outlet pipe 165 is delayed, The refrigerant flowing into the liquid case 110 through the inflow relay tube 113 is further increased, and the liquid refrigerant partially contained in the gaseous refrigerant introduced from the evaporator The refrigerant in the liquid phase is prevented from flowing into the compressor through the heat exchange with the refrigerant introduced from the condenser before passing through the pipe connected by the compressor, and when the refrigerant condensed in the receiver is evaporated to become the gaseous state, The durability of the heat pump can be maintained and the efficiency can be improved.

As described above, according to the present invention, it is possible to provide a liquid separating integral type receiver assembly of a waste water heat recovery system capable of varying the volume inside the receiver according to the amount of refrigerant flowing into the receiver, It is understood that basic technical idea is provided.

It will be apparent to those skilled in the art that many other modifications and applications are possible within the scope of the basic technical idea of the present invention.

100 ... liquid separation integral type receiver
110 ... liquid case
112 ... Lower spring seat
113 ... incoming relay tube
115 ... Emission relay tube
150 ... liquid separation case
163 ... inlet pipe
165 ... outflow tube
167 ... first refrigerant passage
170 ... Heat exchange portion
180 ... second refrigerant passage
190 ... Shield
200 ... volume variable unit
210 ... extension housing
212 ... distribution hole
220 ... Wrought steel
221 ... curved portion
222 ... turbulence forming piece
223 ... upper spring seat
230 ... biasing means
300 ... power generation unit (accumulator)
301 ... piezoelectric element

Claims (5)

The liquid separating case includes a liquid case, a liquid separating case provided on the upper side of the liquid case, an inlet pipe having one end connected to the evaporator and the other end connected to the inside of the liquid separating case, one end connected to the compressor, An inflow relay tube having one end connected to the condenser and the other end connected to the inside of the liquid case; an outlet relay connected to the expansion valve at one end and communicated with the inside of the infusion case; A liquid separating and collecting type fluid containing tube;
And the liquid refrigerant flows from the lower surface of the liquid separation case toward the bottom surface side of the liquid case through the inflow relay pipe and moves up and down according to the amount of the liquid refrigerant flowing into the liquid case. And a liquid coolant supply unit which is disposed at a lower portion of the extension housing inside the liquid case and moves up and down according to an amount of the liquid coolant flowing into the liquid case through the inlet relay pipe and contacts or contacts the lower end edge of the extension housing. A curved surface portion formed on the lifting plate so as to correspond to a shape of a bottom surface of the fluid housing convexed to the lower side; and a curved portion formed on the curved surface portion of the curved surface portion when the lower end edge of the curved surface portion is in contact with the curved surface portion, To the inside of the liquid case And a turbulent flow forming member protruding from an upper surface of the lifting plate so as to be accommodated in the elongate housing and having a length smaller than or equal to a distance from an upper end to a lower end of the elongate housing, A variable unit; And
And a plurality of piezoelectric elements mounted on one side of the liquid case, the load being connected to the volume variable unit to convert the load of the liquid refrigerant flowing into the liquid case into electric energy, so that a part or all of the compressor operating power To the power generation unit,
Wherein the plurality of piezoelectric elements are disposed on the lower side of the lifting plate and the lifting plate,
Wherein an area of the upper surface of the lifting plate is larger than an area of the lower surface of the extending housing.
delete The method according to claim 1,
The volume variable unit may include:
Further comprising biasing means disposed between the bottom surface of the lifting plate and the bottom surface of the inside of the liquid housing to generate a force for pushing the lifting plate to the extending housing side and allow elastic deformation,
Wherein the plurality of piezoelectric elements are disposed at both upper and lower ends of the lifting plate and the biasing means, respectively.
The method according to claim 1,
The power generation unit includes:
And a charge / discharge circuit electrically connected to the plurality of piezoelectric elements and storing and using electric energy produced from the plurality of piezoelectric elements,
Wherein the battery is electrically connected to the compressor. ≪ RTI ID = 0.0 > 11. < / RTI >
The method according to claim 1,
A liquid refrigerant introduced into the liquid separation case through the inlet relay pipe and a liquid refrigerant introduced into the liquid separation case through the inlet pipe and being delayed in flow toward the outlet pipe of the refrigerant introduced into the liquid separation case through the inlet pipe, Further comprising a flow restricting section for increasing the heat exchange efficiency of the liquid separator.

Images