Range hood air volume adjusting device and range hood system

Abstract

The utility model relates to a range hood air volume adjusting device and a range hood system. The range hood air volume adjusting device comprises a printed circuit board, a conductive carbon film, a stove control panel, a metal elastic piece and a range hood control module. The printed circuit board is fixed at the bottom of the kitchen range knob, and a conductive carbon film is printed on the printed circuit board; the head part of the metal elastic sheet is connected with a rotating shaft of a kitchen range knob, and a metal contact is arranged at the tail part of the metal elastic sheet and is in contact connection with the conductive carbon film; the metal contact is used for rotating on the conductive carbon film and generating a corresponding resistance value; the conductive carbon film is connected with the cooker control panel; the cooker control panel is used for generating cooker firepower information corresponding to the resistance value; the cooker control panel is in communication connection with the range hood control module, and the range hood control module is used for adjusting the air volume of the range hood to the air volume corresponding to the cooker firepower information. According to the technical scheme provided by the invention, linkage of the range hood and the stove and accurate adjustment of the air volume of the range hood can be realized, and meanwhile, the use experience of a user is also improved.

Description

Technical Field

[0001] The present application relates to the technical field of range hoods, and in particular to a range hood air volume regulating device and a range hood system. Background Art

[0002] At present, the core mechanism of range hood air volume adjustment relies on the built-in oil fume sensors of the range hood. When the range hood is turned on, these sensors detect the concentration and size of oil fume in real time and automatically adjust the air volume of the range hood according to the concentration and size of oil fume. The mainstream oil fume sensor solutions mainly include infrared sensors and monitoring technologies based on volatile organic compounds (VOCs).

[0003] However, both infrared sensors and VOC sensors are installed inside the range hood. During long-term use, due to the accumulation of oil smoke, oil stains are easily accumulated on the surface of the infrared sensor or VOC sensor. These oil stains will not only reduce the detection accuracy and sensitivity of the sensor, resulting in inaccurate air volume adjustment, but may also have a negative impact on the overall performance and use of the range hood, thereby affecting the user's experience. Therefore, during the use of the range hood, the infrared sensor or VOC sensor installed inside the range hood needs to be replaced or cleaned, which increases the user's use cost and maintenance burden. Summary of the invention

[0004] The present application provides a range hood air volume adjustment device and a range hood system to at least solve the problem of how to accurately adjust the range hood air volume in the related art. The technical solution of the present application is as follows:

[0005] According to a first aspect of an embodiment of the present application, there is provided a range hood air volume adjustment device, comprising a printed circuit board, a conductive carbon film, a stove control board, a metal spring, and a range hood control module;

[0006] The printed circuit board is fixed to the bottom of the stove knob, and the conductive carbon film is printed on the printed circuit board;

[0007] The head of the metal spring is connected to the rotating shaft of the stove knob, and the tail of the metal spring is provided with a metal contact, which is in contact with the conductive carbon film; the metal contact is used to rotate on the conductive carbon film and generate a corresponding resistance value;

[0008] The conductive carbon film is connected to the stove control board via a wire, and the wire is used to transmit the resistance value; the stove control board is used to obtain the resistance value and generate stove fire power information corresponding to the resistance value;

[0009] The stove control panel establishes a communication connection with the range hood control module, and the range hood control module is used to receive the stove firepower information and adjust the range hood air volume to the air volume corresponding to the stove firepower information.

[0010] In a possible implementation, the conductive carbon film includes a first conductive carbon film and a second conductive carbon film, one end of the first conductive carbon film is connected to one end of the second conductive carbon film, and the first conductive carbon film is arranged outside the second conductive carbon film.

[0011] In a possible implementation, the metal contact includes a first metal contact and a second metal contact; the first metal contact is arranged on the outside of the second metal contact;

[0012] The first metal contact is in contact with the first conductive carbon film, and the first metal contact is used to rotate on the first conductive carbon film and generate a corresponding first resistance value;

[0013] The second metal contact is in contact with the second conductive carbon film, and the second metal contact is used to rotate on the second conductive carbon film and generate a corresponding second resistance value.

[0014] In a possible implementation, the wire includes a first wire and a second wire, the first wire is connected to the other end of the first conductive carbon film, and is used to transmit the first resistance value; the second wire is connected to the other end of the second conductive carbon film, and is used to transmit the second resistance value; the cooker control board is connected to the first wire and the second wire respectively;

[0015] The stove control board is used to obtain the first resistance value transmitted by the first wire and the second resistance value transmitted by the second wire.

[0016] In a possible implementation manner, the length of the metal spring is consistent with the radius length of the first conductive carbon film.

[0017] In a possible implementation manner, the first conductive carbon film is arranged in an arc shape on the printed circuit board, and the second conductive carbon film is arranged in an arc shape on the printed circuit board.

[0018] In a possible implementation manner, a rotation angle of the metal contact is consistent with a rotation angle of the stove knob.

[0019] In a possible implementation, the range hood air volume adjustment device further includes a screw, and holes corresponding to the screws are provided on the printed circuit board, and the screws are used to fix the printed circuit board to the bottom of the stove knob through the holes.

[0020] In a possible implementation, the number of the screws is consistent with the number of the holes, and the number of the holes is greater than or equal to 2.

[0021] According to a second aspect of an embodiment of the present application, a range hood system is provided, comprising a range hood and a stove, and also comprising a range hood air volume adjustment device as described in any one of the above items, wherein the range hood air volume adjustment device comprises a stove control panel and a range hood control module, the stove control panel is arranged on the stove, and the range hood control module is arranged on the range hood.

[0022] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application.

[0023] The technical solution provided by the embodiments of the present application brings at least the following beneficial effects:

[0024] The metal contacts on the metal spring are in contact with the conductive carbon film, and the metal contacts are used to rotate on the conductive carbon film and generate corresponding resistance values. The conductive carbon film is connected to the stove control board through a wire, and the resistance value can be accurately converted into corresponding stove fire information;

[0025] The stove control panel establishes a communication connection with the range hood control module, and the range hood control module is used to adjust the range hood air volume to the air volume corresponding to the stove fire information, thereby realizing the close linkage between the range hood and the stove, and ensuring the accurate adjustment of the range hood air volume, providing users with a comfortable cooking environment and improving the user experience;

[0026] In addition, since the range hood air volume adjustment device is mainly integrated in the stove, it can effectively prevent the components in the range hood air volume adjustment device from being contaminated by oil smoke, thereby ensuring the detection accuracy and sensitivity of the range hood air volume adjustment device and reducing the user's care and maintenance costs; at the same time, the range hood can automatically adjust the range hood air volume according to the stove fire power information transmitted by the stove control panel, so that the oil smoke can be removed in time.

[0027] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions and advantages of the embodiments of this specification or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 The figure is a schematic diagram of a range hood air volume regulating device according to an exemplary embodiment.

[0030] Figure 2 is a schematic diagram of a metal dome according to an exemplary embodiment.

[0031] Figure 3 is a schematic diagram of a printed circuit board according to an exemplary embodiment.

[0032] Figure 4 is a schematic diagram of a range hood system according to an exemplary embodiment.

[0033] In the figure,

[0034] 1. Printed circuit board; 21. First metal contact; 22. Second metal contact; 3. Metal spring; 41. First conductive carbon film; 42. Second conductive carbon film; 5. Screw; 61. First wire; 62. Second wire; 7. Knob; 8. Hole; 9. Range hood; 10. Cooker; 11. Cooker knob. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0037] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0038] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0039] The term "and / or" herein is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C can represent including any one or more elements selected from the set consisting of A, B, and C.

[0040] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present disclosure can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present disclosure.

[0041] A range hood is a household appliance installed in the kitchen to remove the fumes produced during cooking. It uses a motor to drive the fan to rotate, generating suction, sucking the fumes from above the stove into the machine, filtering through the oil net, and separating some of the grease and collecting it in the oil collection box, while the gas is discharged to the outside through the exhaust pipe, thereby reducing the fumes pollution in the kitchen, keeping the air clean, protecting human health, and also preventing the fumes from contaminating the kitchen walls, furniture, etc.

[0042] The range hood can be a top-suction range hood, which is installed above the stove and directly absorbs the oil smoke through the air intake on the top. European top-suction range hoods usually have a more fashionable appearance and are suitable for open kitchens; Chinese top-suction range hoods have stronger suction and are more suitable for heavy oil cooking; side-suction range hoods are installed on the side of the stove, closer to the fire source, and can absorb oil smoke faster and reduce the spread of oil smoke. It is suitable for small kitchens or users who do not like to have equipment above their heads; integrated stoves are kitchen appliances that integrate multiple functions such as range hoods, gas stoves, disinfection cabinets or steam ovens, which save space and have good smoke extraction effects. This application does not limit the type of range hoods, and the range hood air volume adjustment device of this application can be used in any range hood.

[0043] The range hood includes a range hood control module, which is used to adjust the air volume of the fan in the range hood. The way to adjust the air volume is an important factor affecting the user experience and the user's health level. For example, too much air volume will cause a lot of noise and bring about a large power loss, affecting the user's experience; too little air volume cannot effectively absorb oil smoke, causing the user to inhale oil smoke, thus affecting the user's health.

[0044] At present, in order to adjust the air volume of the range hood, a fume sensor is generally installed inside the range hood to detect the concentration and size of the fume in real time. However, after long-term use, the fume sensor will accumulate oil stains, resulting in inaccurate detection accuracy and sensitivity, which will affect the range hood air volume adjustment and reduce the user experience. Therefore, the fume sensor needs to be cleaned or replaced frequently, which undoubtedly increases the user's maintenance and replacement costs.

[0045] In order to solve the above-mentioned technical problems, an embodiment of the present application provides a range hood air volume adjustment device, which links the stove and the range hood, and the main components of the range hood air volume adjustment device are arranged on the stove. When the user uses the stove to cook, the stove fire power information during cooking is automatically obtained according to the rotation of the stove knob, and the stove fire power information is transmitted to the range hood control module. The range hood control module adjusts the range hood air volume to the air volume corresponding to the stove fire power information, thereby achieving accurate adjustment of the range hood air volume, avoiding the pollution of the range hood air volume adjustment device by the oil smoke generated by cooking, reducing the user's maintenance and replacement costs, and improving the user's usage experience and the user's health level.

[0046] Figure 1 FIG. 1 is a schematic diagram of a range hood air volume adjustment device according to an exemplary embodiment. Figure 1 As shown, the range hood air volume adjustment device comprises a printed circuit board 1, a conductive carbon film, a metal spring 3, a metal contact, a screw 5 and a wire. The printed circuit board 1 is fixed to the bottom of a stove knob 11. The stove knob 11 can be used to control the fire power of the stove.

[0047] Among them, the stove knob 11 is set on the stove 10, and the stove 10 is a heating device for cooking food. There are many types of stoves, for example, embedded gas stove: an embedded stove installed on the kitchen countertop; desktop gas stove: an independent stove placed in the kitchen; integrated stove: a kitchen appliance that integrates functions such as a gas stove, a range hood, and a disinfection cabinet. The present application does not limit the type of stove, and the range hood air volume adjustment device can be set in any stove.

[0048] Printed Circuit Board 1 (PCB) can refer to a substrate for interconnecting electronic components, which is an indispensable part of modern electronic devices. It provides a platform for electronic components to be physically and electrically connected together to form a complete electronic system. The main function of the printed circuit board 1 is to provide mechanical support for electronic components in a limited space and to achieve electrical connection through a preset conductive path (trace), thereby replacing the complicated wire connection method.

[0049] The basic structure of the printed circuit board 1 may include a substrate, which is the base material of the printed circuit board 1, usually an insulating material, such as glass fiber reinforced plastic or other types of resins, which provides mechanical support for electronic components. The present application does not limit the material of the substrate; a conductive layer, the main conductive material is copper, these copper layers are etched into circuit patterns, forming a conductive path on the circuit board for transmitting signals and power; a solder mask, a colored protective coating, the present application does not limit the color of the protective coating, on all areas of the copper layer except the parts that need to be soldered, to prevent short circuits and protect the copper traces from environmental influences; a silk screen layer, identification text and symbols printed on the printed circuit board 1, which help identify the position and direction of each component for easy assembly; pads, metal areas on the printed circuit board 1 for soldering the pins of electronic components, which are exposed outside the protective coating to ensure good electrical connection; holes, conductive holes used for internal interlayer connections.

[0050] The printed circuit board 1 has good electrical conductivity. A conductive carbon film is printed on the surface of the printed circuit board 1. The conductive carbon film is a conductive coating containing carbon material. When applied to the printed circuit board 1, point contact resistance is formed on the conductive carbon film after contacting with the conductive metal. The conductive carbon film includes a first conductive carbon film 41 and a second conductive carbon film 42. One end of the first conductive carbon film 41 is connected to one end of the second conductive carbon film 42, that is, one end of the first conductive carbon film 41 and one end of the second conductive carbon film 42 are in a connected state. Setting the two conductive carbon films in a connected state can form a complete circuit after the conductive carbon film and the metal contact are in contact, so that a corresponding resistance value can be generated. After the conductive carbon film and the metal contact are fully in contact, the accuracy of the resistance value calculation can also be improved, thereby obtaining accurate stove fire information.

[0051] In a possible implementation, the first conductive carbon film 41 is arranged outside the second conductive carbon film 42, that is, the length of the first conductive carbon film 41 is greater than the length of the second conductive carbon film 42. The first conductive carbon film 41 is arranged in an arc shape on the printed circuit board 1, and the second conductive carbon film 42 is arranged in an arc shape on the printed circuit board 1. The center of the first conductive carbon film 41 and the second conductive carbon film 42 are consistent with the center of the stove knob 11, which can facilitate the metal dome 3 to fully contact the metal contact and the conductive carbon film during the rotation process, thereby obtaining accurate stove fire information, and then accurately adjusting the range hood air volume.

[0052] Figure 2 FIG. 1 is a schematic diagram of a metal spring according to an exemplary embodiment. Figure 2As shown, the metal spring 3 in the range hood air volume adjustment device includes a head and a tail. The head of the metal spring 3 is fixedly connected to the rotating shaft 7 of the stove knob 11. The rotating shaft 7 is arranged inside the stove knob 11. The tail of the metal spring 3 is provided with a metal contact. The metal contact includes a first metal contact 21 and a second metal contact 22. The width of the first metal contact 21 is consistent with the width of the first conductive carbon film 41. The width of the second metal contact 22 is consistent with the width of the second conductive carbon film 42. The first metal contact 21 is arranged outside the second metal contact 22. The metal contact is fully in contact with the conductive carbon film. The metal spring 3 drives the metal contact to rotate as the rotating shaft 7 rotates. The metal contact rotates on the conductive carbon film as the metal spring 3 rotates, thereby generating a resistance value corresponding to the rotation position of the metal contact.

[0053] The metal contact may refer to a metal material with electrical conductivity and corrosion resistance, for example, beryllium copper, which has high elasticity and electrical conductivity; brass, which has good electrical conductivity and processing performance and low cost; silver, which has low resistivity and high electrical conductivity under the same conditions, and an alloy material with electrical conductivity; the present application does not limit the specific metal material of the metal contact. Preferably, the metal spring and the metal contact are both made of brass, which is not limited in the present application.

[0054] In the embodiment of the present specification, the first metal contact 21 is in contact with and connected to the first conductive carbon film 41, and the first metal contact 21 is used to rotate on the first conductive carbon film 41 and generate a first resistance value corresponding to the rotation position of the metal spring 3. The second metal contact 22 is in contact with and connected to the second conductive carbon film 42, and the second metal contact 21 is used to rotate on the second conductive carbon film 42 and generate a second resistance value corresponding to the rotation position of the metal spring 3.

[0055] When the user rotates the cooker knob 11, the metal dome 3 drives the first metal contact 21 to rotate on the first conductive carbon film 41 and drives the second metal contact 22 to rotate on the second conductive carbon film 42. The first resistance value and the second resistance value both change with the change of the rotation position of the metal dome 3.

[0056] The conductive carbon film is connected to the stove control board through a wire, and the wire is used to transmit the resistance generated by the conductive carbon film. The stove control board is used to obtain the resistance value and generate stove fire information corresponding to the resistance value. Among them, the wire includes a first wire 61 and a second wire 62. The first wire 61 is connected to the other end of the first conductive carbon film 41, and is used to transmit the first resistance value generated by the first metal contact 21 and the first conductive carbon film 41. The second wire 62 is connected to the other end of the second conductive carbon film 42, and is used to transmit the second resistance value generated by the second metal contact 21 and the second conductive carbon film 42.

[0057] After receiving the first resistance value and the second resistance value, the stove control board adds the first resistance value and the second resistance value into a resistance value, and generates stove firepower information corresponding to the resistance value, wherein the resistance value is positively correlated with the stove firepower information. The stove firepower information is pre-calibrated data, for example, when the stove knob 11 is in the off state, the stove firepower information is 0, and at this time, the resistance value is also 0; when the stove knob 11 is in the minimum firepower position, the stove firepower information is 1%; when the stove knob 11 is in the maximum firepower position, the stove firepower information is calibrated to 100%. This application does not limit the calibration of the stove firepower information.

[0058] In one possible implementation, the stove control panel can also be used to obtain the total number of rotational contacts between the metal contact and the conductive carbon film. When the total number of contacts reaches the service life threshold, a usage reminder message is generated and sent to the range hood control module. The range hood control module can remind the user to replace the conductive carbon film in time in the visual panel of the range hood based on the usage reminder message, so as to prevent the conductive carbon film in the stove 10 from being consumed, causing the range hood air volume adjustment device to fail and affecting the user's experience.

[0059] In a possible implementation, a stove control panel establishes a communication connection with a range hood control module, wherein the range hood control module is arranged in the range hood 9, and the range hood control module is used to receive stove firepower information and adjust the range hood air volume to the air volume corresponding to the stove firepower information. Exemplarily, the stove 10 and the range hood 9 can be divided into two types: a discrete stove 10 and a range hood 9, and an integrated stove, wherein the stove 10 and the range hood 9 are discrete stoves 10 and range hood 9, and the stove control panel and the range hood control module can be linked by wireless communication, wherein the wireless communication connection mode includes Bluetooth technology, wireless local area network technology, radio frequency identification technology, etc., and the present application does not limit the wireless communication connection mode. When using the wireless communication mode for communication connection, it is necessary to set a wireless unit in a connected state in both the stove control panel and the range hood control module, for example, a Bluetooth module is set in both the stove control panel and the range hood control module, so that the stove control panel and the range hood control module are in a connected state.

[0060] The stove 10 and the range hood 9 are integrated stoves. Wired communication can be used in the integrated stove to link the stove control board and the range hood control module. For example, the stove control board and the range hood control module can be connected by a wire so that the stove control board can completely transmit the stove firepower information to the range hood control module. The present application does not limit the communication method between the stove control board and the range hood control module.

[0061] After the range hood control module receives the stove power information, it automatically adjusts the range hood air volume to the air volume corresponding to the stove power information. The stove power information and the range hood air volume are positively correlated. For example, when the stove power information is calibrated to 100% of the stove power, use a high fire to cook. At this time, the range hood control module adjusts the range hood air volume to 100%. After cooking is completed, for example, after adjusting the stove power from 100% to 0%, the range hood control module can also automatically control the range hood to turn off.

[0062] The visualization panel of the range hood 9 can also display the range hood air volume and stove firepower information, so that the user can clearly view the stove firepower information and the range hood air volume information, thereby improving the user experience.

[0063] In one possible implementation, the length of the metal spring 3 is consistent with the radius length of the first conductive carbon film 41, and the first metal contact 21 can be better set at the tail of the metal spring 3 so that the first metal contact 21 is in full contact with the first conductive carbon film 41, thereby accurately measuring the first resistance value.

[0064] Figure 3 FIG. 1 is a schematic diagram of a printed circuit board according to an exemplary embodiment. Figure 3 As shown, the printed circuit board 1 includes a first wire 61, a second wire 62, a first conductive carbon film 41, a second conductive carbon film 42 and a hole 8. The position of the hole 8 corresponds to that of the screw 5, and the size of the hole 8 also corresponds to that of the screw 5. The screw 5 is fixedly connected to the hole 8 on the printed circuit board 1, thereby fixing the printed circuit board 1 and the bottom of the stove knob 11. The number of the screws 5 and the holes 8 is the same, and the number of the holes 8 is greater than or equal to 2, which can ensure the stability of the printed circuit board 1 when the stove knob 11 is rotated, and avoid the user from loosening the stove knob 11 when the user rotates it, thereby making the acquired resistance value data inaccurate, affecting the user's experience.

[0065] Figure 4 FIG. 1 is a schematic diagram of a range hood system according to an exemplary embodiment. Figure 4 As shown, the range hood system includes a range hood 9 and a stove 10. The present application does not limit the types of the range hood 9 and the stove 10, and also includes the range hood air volume adjustment device in the above embodiment, wherein the range hood air volume adjustment device includes a stove control panel and a range hood control module, the stove control module is arranged on the stove 10, and the range hood control module is arranged on the range hood 9, thereby realizing the linkage between the range hood 9 and the stove 10, and at the same time improving the accuracy of the range hood air volume adjustment, thereby improving the user experience.

[0066] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A range hood air volume adjustment device, characterized in that: The range hood air volume adjustment device comprises a printed circuit board, a conductive carbon film, a stove control board, a metal spring, and a range hood control module; The printed circuit board is fixed to the bottom of the stove knob, and the conductive carbon film is printed on the printed circuit board; The head of the metal spring is connected to the rotating shaft of the stove knob, and the tail of the metal spring is provided with a metal contact, which is in contact with the conductive carbon film; the metal contact is used to rotate on the conductive carbon film and generate a corresponding resistance value; The conductive carbon film is connected to the stove control board via a wire, and the wire is used to transmit the resistance value; the stove control board is used to obtain the resistance value and generate stove fire power information corresponding to the resistance value; The stove control panel establishes a communication connection with the range hood control module, and the range hood control module is used to receive the stove firepower information and adjust the range hood air volume to the air volume corresponding to the stove firepower information.

2. The range hood air volume regulating device according to claim 1, characterized in that: The conductive carbon film includes a first conductive carbon film and a second conductive carbon film, one end of the first conductive carbon film is connected to one end of the second conductive carbon film, and the first conductive carbon film is arranged outside the second conductive carbon film.

3. The range hood air volume regulating device according to claim 2, characterized in that: The metal contact includes a first metal contact and a second metal contact; the first metal contact is arranged on the outside of the second metal contact; The first metal contact is in contact with the first conductive carbon film, and the first metal contact is used to rotate on the first conductive carbon film and generate a corresponding first resistance value; The second metal contact is in contact with the second conductive carbon film, and the second metal contact is used to rotate on the second conductive carbon film and generate a corresponding second resistance value.

4. The range hood air volume regulating device according to claim 3, characterized in that: The wire comprises a first wire and a second wire, the first wire being connected to the other end of the first conductive carbon film and used for transmitting the first resistance value; The second wire is connected to the other end of the second conductive carbon film for transmitting the second resistance value; the cooker control board is connected to the first wire and the second wire respectively; The stove control board is used to obtain the first resistance value transmitted by the first wire and the second resistance value transmitted by the second wire.

5. The range hood air volume regulating device according to claim 2, characterized in that: The length of the metal spring is consistent with the radius length of the first conductive carbon film.

6. The range hood air volume regulating device according to claim 2, characterized in that: The first conductive carbon film is arranged in an arc shape on the printed circuit board, and the second conductive carbon film is arranged in an arc shape on the printed circuit board.

7. The range hood air volume regulating device according to claim 1, characterized in that: The rotation angle of the metal contact is consistent with the rotation angle of the stove knob.

8. The range hood air volume regulating device according to claim 1, characterized in that: The range hood air volume adjustment device further comprises screws, holes corresponding to the screws are arranged on the printed circuit board, and the screws are used to fix the printed circuit board to the bottom of the stove knob through the holes.

9. The range hood air volume regulating device according to claim 8, characterized in that: The number of the screws is consistent with the number of the holes, and the number of the holes is greater than or equal to 2.

10. A range hood system, comprising a range hood and a stove, characterized in that: It also includes the range hood air volume regulating device according to any one of claims 1 to 9, wherein the range hood air volume regulating device includes a stove control panel and a range hood control module, the stove control panel is arranged on the stove, and the range hood control module is arranged on the range hood.

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