CN105465851B - The control method of smoke exhaust ventilator and smoke exhaust ventilator - Google Patents

Abstract

The invention proposes a new improvement aiming at the range hood and the control method of the range hood. The range hood proposed by the present invention includes a lighting device, the lighting device is used to provide lighting for cooking, and the range hood is used to absorb the oil fume generated by cooking in a cooking area, and the lighting device is also used to Nighttime non-cooking lighting is automatically provided to the cooking zone. In this way, the lighting device of the range hood is intelligently used for non-cooking lighting at night, which expands the application of the lighting device of the range hood.

Description

Range hood and control method for range hood

【Technical field】

The invention relates to the field of range hoods and the field of control methods for range hoods.

【Background technique】

Existing range hoods are generally provided with lighting devices. However, the function of the lighting device of the existing range hood is very single, and it is only used to provide lighting for cooking, that is, lighting in the cooking stage. However, in fact, when the user enters the kitchen, he does not necessarily intend to cook. For example, at night, the user will enter the kitchen to get a glass of water or food. At this time, there is also a lighting demand. At present, the lighting needs are generally met by the lamps installed in the kitchen. However, sometimes the lighting switch in the poorly lit kitchen It is not easy to find, and the situation that the user forgets to turn off the lamp after turning it on also happens from time to time. In addition, it is worth mentioning that those skilled in the art have formed a deep-rooted understanding that the lighting device of the range hood and the lighting device installed in the kitchen are two lighting devices with completely different functions, even if the lighting device installed in the kitchen The above-mentioned problems exist in actual use, and those skilled in the art have no motivation to solve these technical problems starting from the lighting device of the range hood.

References to prior art herein are not intended to be an admission that such prior art was known to those of ordinary skill in the art to which the present invention pertains prior to the filing date of this application, unless supported by sufficient evidence.

【Content of invention】

The main purpose of the present invention is to propose a new improvement for the range hood and the control method of the range hood.

The range hood proposed by the present invention includes a lighting device, the lighting device is used to provide lighting for cooking, and the range hood is used to absorb the oil fume generated by cooking in a cooking area, and the lighting device is also used to Nighttime non-cooking lighting is automatically provided to the cooking zone. The so-called "cooking area" can be understood as: a certain area around the range hood; for example, in the case where the range hood is applied to a closed kitchen, the "cooking area" can be the entire area or partial area. The so-called "nighttime" can be understood as any situation in which the brightness in the cooking area is not enough, and the user needs lighting when entering the cooking area, including but not limited to "nighttime" in a narrow sense. The so-called "lighting for non-cooking" can be understood as: the lighting provided for the cooking area when there is no cooking in the cooking area. In this way, the lighting device of the range hood is intelligently used for non-cooking lighting at night, which expands the application of the lighting device of the range hood.

Optionally, a detection module is included to control the lighting device; the lighting device can automatically provide night non-cooking lighting for the cooking area by setting as follows: the detection module is used to detect the When there is a person in the cooking area, the lighting device is turned on until no one is detected in the cooking area. That is, the detection module is configured to turn on the lighting device when it detects that there are people in the cooking area, and turn off the lighting device until it detects that there is no one in the cooking area.

Optionally, a detection module is included to control the lighting device; the lighting device can automatically provide night non-cooking lighting for the cooking area by setting as follows: the detection module is used to detect the When there are people in the cooking area, the lighting device is turned on and lasts for a preset period of time.

Optionally, the detection module includes an identification device for detecting whether there is a person in the cooking area; the identification device includes a pyroelectric human body infrared sensor or an infrared reflective sensor or a Doppler sensor or a voice recognition device or a portrait recognition device or motion recognition device.

Optionally, the detection module is also used to determine whether it is daytime or nighttime in the current cooking area, and when it is determined that it is nighttime in the current cooking area, the detection module is used to control the lighting device to realize the The lighting device automatically provides night-time non-cooking lighting for the cooking zone. The so-called "daytime", as opposed to "nighttime", this "daytime" can be understood as: any situation in which the brightness in the cooking area is sufficient, and then the user does not need lighting when entering the cooking area, including but not limited to "daytime" in a narrow sense . In this way, the intelligence level of the lighting device of the range hood for non-cooking lighting at night can be improved.

Optionally, the detection module is also used to detect the ambient brightness in the cooking zone to determine whether it is daytime or nighttime in the cooking zone.

Optionally, the range hood includes a clock module for determining the current time; the detection module is also used for determining whether it is day or night in the cooking area based on the current time provided by the clock module. at night.

Optionally, the range hood includes a man-machine interface; the man-machine interface is used for the user to control whether the detection module is turned on or not. In this way, it is possible to manually control whether the detection module is turned on or not, and it is no longer necessary to use the detection module to determine whether it is daytime or nighttime in the current cooking zone.

Optionally, the lighting device is also used to automatically end the cooking lighting; the lighting device automatically ends the cooking lighting by setting as follows: the detection module is used to detect that the cooking area Turn off the lighting when no one is around. The so-called "lighting for cooking" can be understood as: the lighting provided by the lighting device when cooking in the cooking area. Generally, at this time, the range hood is running to absorb oil fumes. In this way, the waste of electric energy caused by forgetting to turn off the lighting device can be avoided.

The detection module is also used to determine whether the range hood is in a non-working state, and when it is determined that the range hood is in a non-working state, control the lighting device to automatically provide nighttime non-working conditions for the cooking area. Lighting for cooking. The so-called "the range hood is in a non-working state" can be understood as: no cooking is performed in the cooking zone, therefore, the range hood is not operating for absorbing the oil fume.

Optionally, the lighting device includes two different working modes: a lighting mode for cooking and a lighting mode for non-cooking at night. It should be noted that the reason why it is called "two different working modes" is because the lighting effects of the two different working modes are different. Since the lighting requirements for lighting for cooking and lighting for non-cooking at night are different, correspondingly, two different working modes are provided to better meet the different lighting requirements.

Optionally, the brightness of the lighting device in the lighting mode for cooking is different from the brightness of the lighting device in the lighting mode for non-cooking at night. That is, the same lighting device is used in both the lighting mode for cooking and the lighting mode for non-cooking at night, but the brightness is different.

Optionally, the light projection angle of the lighting device in the cooking lighting mode is different from the light projection angle of the lighting device in the non-cooking lighting mode at night. That is, the same lighting device is used in both the lighting mode for cooking and the lighting mode for non-cooking at night, and only the projection angle of light is different.

Optionally, the lighting device includes a first lighting part and a second lighting part; the first lighting part is used in a lighting mode for cooking; the second lighting part is used in a lighting mode for non-cooking at night.

Optionally, the rated power of the first lighting element is different from the rated power of the second lighting element.

Optionally, the second lighting element is fixed on the range hood in a manner that can be manually installed and detached. That is, without using tools, the second lighting piece can be fixed on the range hood only by manual operation, and the second lighting piece can also be removed from the range hood only by manual operation. Remove from range hood. In this way, it is convenient to replace and maintain the second lighting part, and it is also convenient to remove the second lighting part from the range hood when the range hood is in working state so as to avoid adhesion of grease.

Optionally, the second lighting member is fixed on the range hood by magnetic adsorption or suction cup adsorption or buckling. Here, the "buckle" should be understood in a broad sense, that is, it should be understood as: any elasticity that can be applied to the present invention through the connector itself can be clearly imagined by those of ordinary skill in the art based on this specification, the prior art and common knowledge. A connection scheme that achieves connection and fixation by deformation and/or form fit, and can be disconnected without damaging the connection.

Optionally, the range hood is provided with a USB interface; the range hood supplies power to the second lighting element through the USB interface and thereby controls the second lighting element.

Optionally, the range hood controls the second lighting element through wireless communication. In this way, it is possible to physically separate the range hood from the second lighting element, thereby making the installation position of the second lighting element more flexible.

Optionally, the second lighting element is provided with a rechargeable battery and is powered by the rechargeable battery.

Optionally, the second lighting element is configured to be at least partially hidden when it is in a non-working state. In this way, the adhesion of grease to the second lighting element can be avoided or reduced.

Optionally, the range hood is used to control the lighting device to adopt the lighting mode for cooking when the range hood is in the working state; it is also used to control the The lighting device adopts the lighting mode for non-cooking at night. The so-called "the range hood is in a non-working state" can be understood as: no cooking is performed in the cooking zone, therefore, the range hood is not operating for absorbing the oil fume. The so-called "range hood is in working state" can be understood as: the cooking area is cooking, therefore, the range hood is running to absorb the oil fumes. What needs to be emphasized here is that "the lighting device adopts the lighting mode for cooking" mentioned here does not mean "the lighting device must actually operate the lighting mode for cooking", but means "if the lighting device is turned on at this time, to operate the cooking light mode". Here, "the lighting device adopts the lighting mode for non-cooking at night" does not mean "the lighting device must actually operate the lighting mode for non-cooking at night", but means "if the lighting device is turned on at this time, it will run at night. Non-cooking lighting modes".

The present invention also proposes a method for controlling a range hood. The range hood includes a lighting device and a detection module. The cooking fume, the control method includes the following steps: determine whether it is day or night in the current cooking area, if it is determined to be night and the range hood is in a non-working state, then use the detection module to detect the Whether there are people in the cooking area, when it is detected that there are people in the cooking area, the lighting device is automatically turned on. In this way, the lighting device of the range hood is intelligently used for non-cooking lighting at night, which expands the application of the lighting device of the range hood.

Optionally, the following step is also included: determining whether it is day or night in the current cooking area, and if it is determined to be night and the range hood is in a non-working state, then using the detection module to detect whether the cooking area is When someone is detected in the cooking area, the lighting device is automatically turned on to provide lighting for non-cooking at night until no one is detected in the cooking area.

Optionally, the following step is also included: determining whether it is day or night in the current cooking area, and if it is determined to be night and the range hood is in a non-working state, then using the detection module to detect whether the cooking area is When someone is detected in the cooking area, the lighting device is automatically turned on for a preset period of time.

Optionally, the following step is further included: when the range hood is in the working state, if no one is detected in the cooking area through the detection module, then automatically turn off the lighting device. In this way, the waste of electric energy caused by forgetting to turn off the lighting device can be avoided.

What needs to be pointed out here is that the "first" and "second" appearing in this specification are only used for descriptive purposes, and are not used to indicate relative importance; definition; moreover, it is not a definition of the logical or sequential relationship of the features it defines.

The above summary of the present invention is not intended to describe all possible implementations of the present invention. Throughout the application, guidance is provided in several places by listing examples that can be used in every possible combination.

【Description of drawings】

The following drawings only illustrate and explain the present invention schematically, and do not limit the scope of the present invention, wherein:

Fig. 1 is a schematic diagram of a use state of a range hood embodiment of the present invention;

Fig. 2 is a flow chart of an embodiment of a method for controlling a range hood according to the present invention.

【Detailed ways】

In order to make the object, scheme and beneficial effect of the present invention more clear, the present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments. Individual drawings may not be accurate enough, in this case, please refer to the text description.

Example 1

The present invention proposes a range hood embodiment, the range hood is used to absorb the oil fume produced by cooking in a cooking area, specifically, the range hood is installed in a closed kitchen, and the range hood is used for Suction the cooking fumes in the kitchen. The range hood includes a man-machine interface, a lighting device and a detection module. The detection module is used to control the lighting device.

The lighting device is used not only for automatically ending lighting for cooking, but also for automatically providing nighttime non-cooking lighting for the cooking zone. When the lighting device is used to automatically provide lighting for cooking, the brightness is lower than when the lighting device is used to automatically provide nighttime non-cooking lighting for the cooking area. Because, when the lighting device is used to provide lighting for cooking, generally, the lamps installed in the kitchen will also be turned on, and furthermore, the brightness requirement of the lighting device is lower at this time.

The detection module includes an identification device for detecting whether there is a person in the kitchen, and the identification device includes a Doppler sensor. The Doppler sensor is used to detect whether there are people in the kitchen.

The detection module is also used to determine whether it is day or night in the current cooking zone. When it is determined that it is daytime, the detection module does not control the lighting device, and when it is determined that it is night, the detection module is used to control the lighting device. Specifically, the detection module is also used to detect the ambient brightness in the kitchen to determine whether it is daytime or nighttime in the current cooking area. When it is determined that it is nighttime, the detection module is also used to determine whether the range hood is in a non-working state, and when it is determined that the range hood is in a non-working state, the detection module is used to control the lighting device to automatically provide Lighting for non-cooking at night; when it is determined that the range hood is in a working state, the detection module is used to control the lighting device to automatically end the lighting for cooking.

Specifically, at night, the "detection module is used to control the lighting device to automatically provide nighttime non-cooking lighting for the cooking area" through the following settings: the detection module is used to turn on the lighting device when it detects that there are people in the kitchen Until no one is detected in the kitchen. This is to achieve such an effect: at night, as long as there are people in the kitchen, the lighting device is always on; the lighting device is not turned off until everyone leaves the kitchen. For example, at night, when a user enters the kitchen to take a glass of water, once the door of the kitchen is opened, the detection module can detect that someone has entered the kitchen, as shown in Figure 1, the detection module will immediately turn on the lighting device; The module detects that there is no one in the kitchen, and the detection module just turns off the lighting device. For another example, the user is in the kitchen during the day and stays in the kitchen until night. The detection module starts to detect whether there is anyone in the kitchen when it is determined that it is currently night, and then it can detect that there is someone in the kitchen, and the detection module immediately turns on the lighting device; until the user leaves, the detection module detects that there is no one in the kitchen. Turn off lighting. If the detection module detects that there are people in the kitchen, the lighting device has been manually turned on by the user, so it is naturally unnecessary for the detection module to "turn on the lighting device"; however, the detection module is still used to detect that there is no one in the kitchen. The device turns off.

The "detection module is used to control the lighting device to automatically end the lighting for cooking" is realized by the following settings: when cooking, the user turns on the lighting device through the man-machine interface; the detection module is used to detect no one in the cooking area and When the lighting device is turned on, the detection module turns off the lighting device. Of course, if the detection module detects that there is no one in the cooking zone, the lighting device has been turned off; then, it is naturally unnecessary for the detection module to "turn off the lighting device".

The above are only preferred embodiments of the present invention, and some technical features can be added, deleted, modified or replaced to obtain other embodiments. For example, the Doppler sensor can also be replaced by a pyroelectric human body infrared sensor or an infrared reflective sensor or a voice recognition device or a portrait recognition device or an action recognition device to detect whether there are people in the cooking area. Specifically, when using a voice recognition device, it may be that the voice recognition device pre-stores at least one voice password, such as "turn on the light"; when the user enters the cooking area at night, he can shout out the password; the voice recognition device receives After receiving the voice information of the user, the identification and judgment are carried out. If it is determined that the password "turn on the light" is called out, the detection module will immediately turn on the lighting device. For another example, it is also possible that the detection module detects other physical and/or chemical parameters in the cooking zone to determine whether it is day or night in the current cooking zone. For another example, it is also possible to determine whether it is daytime or nighttime in the current cooking zone through the following settings: the range hood includes a clock module for determining the current time; the detection module is also used for determining the time based on the current time provided by the clock module Whether the current cooking zone is day or night. Specifically, the detection module pre-stores time intervals corresponding to daytime and nighttime, so that it is determined whether it is daytime or nighttime in the current cooking zone based on the time intervals in which the current time provided by the clock module falls. The time interval can be adjusted by the user based on his actual needs. For another example, it is also possible that the user himself determines whether it is daytime or nighttime in the current cooking area, and then the user controls whether the detection module is turned on or not. For another example, it may also be a lighting device for automatically providing lighting for cooking at night. Specifically, at night and when the range hood is operating for sucking oil fumes, the detection module is used to turn on the lighting device when it detects that there are people in the cooking area until it detects that there is no one in the cooking area.

Example 2

The present invention also proposes another embodiment 2 of the range hood, which is further improved on the basis of the above embodiment 1 of the range hood. The main differences between the second embodiment of the range hood and the first embodiment of the range hood are as follows.

The second embodiment of the range hood realizes that the lighting device automatically provides lighting for the cooking area for non-cooking at night through the following settings: the detection module is used to turn on the lighting device when it detects that there are people in the cooking area and last for a preset period of time 5 minutes.

Specifically, the recognition device of the detection module includes a motion recognition device, and when the motion recognition device detects that the door of the kitchen is opened, the detection module turns on the lighting device for 5 minutes. When the lighting device is continuously turned on for 5 minutes, the detection module turns off the lighting device; at the same time, the motion recognition device restarts the detection of whether the kitchen door is opened. If the motion recognition device detects that the kitchen door is opened again, the detection module Turn on the lighting device and leave it on for 5 minutes.

The above-mentioned "preset time" can be adjusted by the user based on his own needs.

For other structures and cooperation relations of the second embodiment of the range hood, please refer to the corresponding description of the first embodiment of the range hood.

The above are only preferred embodiments of the present invention, and some technical features can be added, deleted, modified or replaced to obtain other embodiments. For example, the "preset time" can also be set to other feasible time, such as 1 minute, 2 minutes, 3 minutes or 10 minutes.

Example 3

The present invention also proposes another embodiment 3 of the range hood, which is further improved on the basis of the above embodiment 1 of the range hood. The main differences between the third embodiment of the range hood and the first embodiment of the range hood are as follows.

The lighting device of Embodiment 3 of the range hood includes two different working modes: a lighting mode for cooking and a lighting mode for non-cooking at night. Specifically, the lighting device of Embodiment 3 of the range hood includes a first lighting part and a second lighting part. The first lighting part is specially used for the lighting mode for cooking; the second lighting part is specially used for the lighting mode for non-cooking at night.

The detection module is also used to control the lighting device to adopt the lighting mode for cooking when the range hood is in the working state; the detection module is also used to control the lighting device to adopt the non-cooking lighting mode at night when the range hood is not in the working state .

The body of the range hood embodiment 3 is provided with a USB interface; the range hood supplies power to the second lighting element through the USB interface and thereby controls the second lighting element.

The second lighting part is fixed on the range hood in a manually installable and detachable manner. Specifically, the second lighting element includes a magnet, and the body of the range hood includes a metal material that can be attracted by the magnet. The second illuminating part is adsorbed and fixed on the body of the range hood through the magnet.

For other structures and cooperation relations of the third embodiment of the range hood, please refer to the corresponding description of the first embodiment of the range hood.

The above are only preferred embodiments of the present invention, and some technical features can be added, deleted, modified or replaced to obtain other embodiments. For example, it is also possible that the same lighting element is used both in the lighting mode for cooking and in the lighting mode for non-cooking at night. However, the lighting effect of the lighting element in the lighting mode for cooking is different from the lighting effect in the lighting mode for non-cooking at night. For example, the brightness of the lighting part in the cooking lighting mode is different from the brightness of the lighting part in the non-cooking lighting mode at night; The projection angle of the light in the non-cooking lighting mode at night is different. For another example, it is also possible that the second lighting part is fixed on the range hood by sucking or buckling with a suction cup. For another example, it is also possible that the second lighting element is provided with a rechargeable battery and is powered by the rechargeable battery. For another example, it may also be that the range hood controls the second lighting element through wireless communication. For another example, it is also possible that the second lighting element is configured to be completely hidden when it is in a non-working state. The "non-working state of the second lighting element" mentioned here refers to the state that the second lighting element is not used for night non-cooking lighting. For another example, it is also possible that the lighting device is controlled by the user through the man-machine interface to adopt the lighting mode for cooking or the lighting mode for non-cooking at night.

Example 4

The present invention also proposes an embodiment of a method for controlling a range hood, so as to automatically provide night non-cooking lighting for the cooking area. The range hood targeted by the embodiment of the control method is used for sucking the oil fume generated by cooking in a cooking zone. The range hood targeted by the embodiment of the control method includes a lighting device and a detection module, and the detection module is used to control the lighting device.

As shown in Figure 2, the control method embodiment of the range hood includes the following steps:

S1. Determine whether it is daytime or nighttime in the current cooking area;

S2. If it is determined that it is currently daytime, then jump to step S1, and if it is determined that it is currently night, then further determine whether the range hood is in working condition;

S3. If it is determined that the range hood is not working, then use the detection module to detect whether there is anyone in the cooking area, if no one is detected in the cooking area, then jump to step S1; if it is detected that there is someone in the cooking area, it will be turned on automatically The lighting device is used to provide lighting for non-cooking at night, and the lighting device is not automatically turned off until the detection module detects that there is no one in the cooking area, and then jumps to step S1;

S4. If it is determined that the range hood is in the working state, then the detection module is used to detect whether there is anyone in the cooking area. If the detection module detects that there is no one in the cooking area, if the lighting device is turned on at this time, the lighting device is automatically turned off. Then jump to step S1.

The above are only preferred embodiments of the present invention, and some technical features can be added, deleted, modified or replaced to obtain other embodiments. For example, it may also be that when someone is detected in the cooking area, the lighting device is automatically turned on for a preset period of time to provide lighting for non-cooking at night. For another example, the above-mentioned automatic judgment on whether it is day or night in the current cooking area and the automatic judgment on whether the range hood is in working condition can be replaced by manual control by the user, so as to automatically provide the cooking area with non-cooking food at night. Illumination; for example, if a start command from the user is received, the following steps are directly performed: detect whether there is anyone in the cooking area, and if it is detected that there is someone in the cooking area, the lighting device is automatically turned on to provide lighting for non-cooking at night until it is detected The lighting only switches off automatically when no one is in the cooking zone.

Example 5

The present invention also proposes an embodiment of a range hood, which is configured to be suitable for running the control method for the range hood described in Embodiment 4 above.

It should be noted that the present invention should not be construed as being limited to the above-described embodiments, but should be construed as covering all possible implementations determined by the claims of the present invention in combination with the disclosures in the specification. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention, which do not deviate from the technical solution of the present invention, all belong to the protection scope of the technical solution of the present invention. In particular, it should be pointed out that any improved application based on the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims (20)

1. A range hood, comprising a lighting device, the lighting device is used to provide lighting for cooking, and the range hood is used to absorb the oil fume produced by cooking in a cooking area, characterized in that: The lighting device is also used to automatically provide night non-cooking lighting for the cooking zone; The lighting device includes two different working modes: a lighting mode for cooking and a lighting mode for non-cooking at night; The lighting device includes a first lighting part and a second lighting part; The first lighting element is used in a lighting mode for cooking; The second lighting element is used in a non-cooking lighting mode at night. 2. The range hood according to claim 1, characterized in that: including a detection module for controlling the lighting device; The lighting device can automatically provide night non-cooking lighting for the cooking area through the following settings: the detection module is used to turn on the lighting device when it detects that there are people in the cooking area until it detects the until no one is in the cooking area. 3. The range hood according to claim 1, characterized in that: including a detection module for controlling the lighting device; The lighting device can automatically provide lighting for the cooking area for non-cooking at night through the following settings: the detection module is used to turn on the lighting device when it detects that there are people in the cooking area for a preset period of time. set time. 4. The range hood according to claim 2 or 3, characterized in that: The detection module includes an identification device for detecting whether there is a person in the cooking area; The recognition device includes a pyroelectric human body infrared sensor, an infrared reflective sensor, a Doppler sensor, a voice recognition device, a portrait recognition device or an action recognition device. 5. The range hood according to claim 2 or 3, characterized in that: The detection module is also used to determine whether it is day or night in the current cooking area, and when it is determined that it is night in the current cooking area, the detection module is used to control the lighting device so that the lighting device automatically Nighttime non-cooking lighting is provided for the cooking zone. 6. The range hood according to claim 5, characterized in that: The detection module is also used to detect the ambient brightness in the cooking area to determine whether it is day or night in the cooking area. 7. The range hood according to claim 5, characterized in that: The range hood includes a clock module for determining the current time; The detection module is further configured to determine whether it is daytime or nighttime in the cooking area based on the current time provided by the clock module. 8. The range hood according to claim 2 or 3, characterized in that: The range hood includes a man-machine interface; The man-machine interface is used for the user to control whether the detection module is turned on or not. 9. The range hood according to claim 2 or 3, characterized in that: The lighting device is also used to automatically end lighting for cooking; Through the following settings to realize that the lighting device automatically ends the lighting for cooking: The detection module is used to turn off the lighting device when no one is detected in the cooking area. 10. The range hood according to claim 2 or 3, characterized in that: The detection module is also used to determine whether the range hood is in a non-working state, and when it is determined that the range hood is in a non-working state, control the lighting device to automatically provide nighttime non-working conditions for the cooking area. Lighting for cooking. 11. The range hood according to claim 1, characterized in that: The brightness of the lighting device in the lighting mode for cooking is different from the brightness of the lighting device in the lighting mode for non-cooking at night. 12. The range hood according to claim 1, characterized in that: The light projection angle of the lighting device in the cooking lighting mode is different from the light projection angle of the lighting device in the nighttime non-cooking lighting mode. 13. The range hood according to claim 1, characterized in that: The rated power of the first lighting element is different from the rated power of the second lighting element. 14. The range hood according to claim 1, characterized in that: The second lighting element is fixed on the range hood in a manner that can be manually installed and detached. 15. The range hood according to claim 14, characterized in that: The second lighting element is fixed on the range hood by magnetic adsorption or suction cup adsorption or buckling. 16. The range hood according to claim 1, characterized in that: The range hood is provided with a USB interface; The range hood supplies power to the second lighting element through the USB interface to control the second lighting element. 17. The range hood according to claim 1, characterized in that: The range hood controls the second lighting element through wireless communication. 18. The range hood according to claim 17, characterized in that: The second lighting element is provided with a rechargeable battery and is powered by the rechargeable battery. 19. The range hood according to claim 1, characterized in that: The second lighting element is arranged to be at least partially hidden when it is in an inoperative state. 20. The range hood according to claim 1, characterized in that: The range hood is used to control the lighting device to adopt the lighting mode for cooking when the range hood is in the working state; Non-cooking lighting mode.