Lens contamination compensation for oil fume sensor, range hood control method and system

Abstract

The present disclosure provides a method and system for compensating for lens contamination in a fume sensor and controlling a range hood, relating to the technical field of kitchen appliances. The lens contamination compensation method includes: obtaining an AD value output by the fume sensor at predetermined intervals; calculating the contamination rate of the fume sensor lens based on the AD value; and compensating the real-time AD value output by the fume sensor based on the lens contamination rate to obtain a corrected AD output value. By compensating and correcting the AD output value of the fume sensor, the present disclosure effectively avoids temperature interference and solves the problem of temperature drift in the AD output value. It also addresses the problem of external light interference on the fume sensor's transmitting and receiving tubes, as well as the problem of detection failure caused by fume contamination on the lens, thereby improving fume detection effectiveness.

Description

Technical Field

[0001] The present disclosure relates to the technical field of kitchen appliances, and in particular to a method and system for compensating for lens contamination of an oil fume sensor and controlling a range hood. Background Art

[0002] Most of the oil fume sensors currently on the market adopt the principle of light scattering. The light emitting tube emits light into the cavity to be tested. The light is refracted by the oil fume particles in the cavity and received by the photoelectric receiving tube. It is then converted into an electrical signal through the photoelectric conversion circuit, thereby achieving the purpose of oil fume detection.

[0003] Prolonged operation of the oil fume sensor can cause the lens to become contaminated by oil fume, leading to detection failure. Existing electronic control schemes involve a receiving tube generating photocurrent after receiving scattered light. This is converted to a voltage signal via a sampling resistor. This voltage signal is then amplified by a two-stage or multi-stage op amp, and finally output as an analog-to-digital (AD) value for acquisition by a microcontroller. Because these two-stage or multi-stage op amps require multiple electronic components, such as op amps and resistors, the circuits are prone to problems such as poor consistency, weak anti-interference capabilities, and temperature drift. These issues can lead to significant differences in AD output values ​​for the same oil fume concentration, ultimately causing deviations in oil fume detection results. Summary of the Invention

[0004] The technical problem to be solved by the present disclosure is to overcome the above-mentioned defects in the prior art and provide a method and system for compensating for lens contamination of an oil fume sensor and controlling a range hood.

[0005] The present disclosure solves the above technical problems through the following technical solutions:

[0006] In a first aspect, a method for compensating lens contamination of an oil smoke sensor is provided, the method comprising:

[0007] Obtaining the AD value of the oil smoke sensor output at every preset period;

[0008] Calculate the lens contamination rate of the oil smoke sensor according to the AD value;

[0009] The real-time AD value output by the oil smoke sensor is compensated according to the lens contamination rate to obtain a corrected AD output value.

[0010] Preferably, the step of obtaining the AD value output by the oil smoke sensor at every preset period specifically includes:

[0011] Collecting the AD value of the oil smoke sensor's emitting tube off as a reference value, and collecting the AD value of the oil smoke sensor's emitting tube on as a sampling value;

[0012] Acquire the real-time temperature, and convert the reference value and the sampled value into AD values ​​at a preset standard temperature and perform smoothing filtering to obtain the mean of the reference value and the mean of the sampled value;

[0013] The difference between the mean of the reference values ​​and the mean of the sampling values ​​is used as the AD value output by the oil smoke sensor.

[0014] Preferably, the lens contamination rate is calculated as follows: P = (Z n -Z n-1 ) / Z0;

[0015] Wherein, P is the lens contamination rate, Z0 is the initial AD value recorded before the range hood is operated, and Z n It is the AD value corresponding to the nth period recorded at every preset period after the range hood is running.

[0016] Preferably, the calculation formula of the corrected AD output value is: Lg=(1+P)*L;

[0017] Wherein, Lg is the AD output value after correction, and L is the AD value output by the oil smoke sensor.

[0018] In a second aspect, a range hood control method is provided, the method comprising:

[0019] Based on the lens contamination compensation method for the oil fume sensor provided in the first aspect, obtaining a calibrated AD output value of the oil fume sensor;

[0020] When the AD output value is less than a preset minimum threshold, the range hood is controlled to operate at a low gear;

[0021] When the AD output value is not less than the minimum threshold and not greater than the preset maximum threshold, controlling the range hood to operate at a mid-range speed;

[0022] When the AD output value is greater than the maximum threshold, the range hood is controlled to operate at a high gear.

[0023] In a third aspect, a lens contamination compensation system for an oil smoke sensor is provided, the system comprising:

[0024] The acquisition module is used to obtain the AD value output by the oil smoke sensor at every preset period;

[0025] A calculation module, configured to calculate a lens contamination rate of the oil smoke sensor according to the AD value;

[0026] The compensation module is used to compensate the real-time AD value output by the oil smoke sensor according to the lens contamination rate to obtain a corrected AD output value.

[0027] Preferably, the acquisition module is specifically used for:

[0028] Collecting the AD value of the oil smoke sensor's emitting tube off as a reference value, and collecting the AD value of the oil smoke sensor's emitting tube on as a sampling value;

[0029] Acquire the real-time temperature, and convert the reference value and the sampled value into AD values ​​at a preset standard temperature and perform smoothing filtering to obtain the mean of the reference value and the mean of the sampled value;

[0030] The difference between the mean of the reference values ​​and the mean of the sampling values ​​is used as the AD value output by the oil smoke sensor.

[0031] Preferably, the lens contamination rate is calculated as follows: P = (Z n -Z n-1 ) / Z0;

[0032] Wherein, P is the lens contamination rate, Z0 is the initial AD value recorded before the range hood is operated, and Z n It is the AD value corresponding to the nth period recorded at every preset period after the range hood is running.

[0033] Preferably, the calculation formula of the corrected AD output value is: Lg=(1+P)*L;

[0034] Wherein, Lg is the AD output value after correction, and L is the AD value output by the oil smoke sensor.

[0035] In a fourth aspect, a range hood control system is provided, the system comprising:

[0036] an output module, configured to obtain a calibrated AD output value of the oil fume sensor based on the lens contamination compensation system for the oil fume sensor provided in the third aspect;

[0037] A control module is used to compare the AD output value with a preset minimum threshold and a preset maximum threshold, thereby adjusting the gear position of the range hood. The control module specifically includes:

[0038] a first control unit, configured to control the range hood to operate at a low gear when the AD output value is less than the minimum threshold;

[0039] a second control unit, configured to control the range hood to operate at a mid-range when the AD output value is not less than the minimum threshold and not greater than the maximum threshold;

[0040] The third control unit is used to control the range hood to operate at a strong gear when the AD output value is greater than the maximum threshold.

[0041] In a fifth aspect, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the lens contamination compensation method for the oil fume sensor and the control method for the range hood are implemented.

[0042] In a sixth aspect, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the method for compensating for lens contamination of an oil fume sensor and the method for controlling an oil fume hood are implemented.

[0043] The positive progressive effect of the present disclosure is that: the present disclosure provides a method and system for compensating for lens contamination of an oil fume sensor and controlling a range hood. By compensating and correcting the AD output value of the oil fume sensor, temperature interference is effectively avoided, and the problem of temperature drift of the AD output value is solved. At the same time, the problem of interference of external light on the transmitting tube and receiving tube of the oil fume sensor, as well as the problem of detection failure caused by oil fume contamination of the lens are solved, thereby improving the oil fume detection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic flow chart of a lens contamination compensation method for an oil smoke sensor provided in Example 1 of the present disclosure;

[0045] Figure 2 A schematic diagram of a sub-flow diagram of a lens contamination compensation method for an oil smoke sensor provided in Example 1 of the present disclosure;

[0046] Figure 3 A flow chart of a range hood control method provided in Example 2 of the present disclosure;

[0047] Figure 4 This is a structural diagram of a lens contamination compensation system for an oil fume sensor provided in Example 3 of the present disclosure;

[0048] Figure 5 A schematic structural diagram of a range hood control system provided in Example 4 of the present disclosure;

[0049] Figure 6 A schematic diagram of the structure of an electronic device provided in Example 5 of the present disclosure DETAILED DESCRIPTION

[0050] The present disclosure is further illustrated below by way of examples, but the present disclosure is not limited to the scope of the examples.

[0051] Example 1

[0052] This embodiment provides a lens contamination compensation method for a fume sensor. Figure 1This is a flow chart of a lens contamination compensation method for a fume sensor provided in Example 1 of the present disclosure, as shown in FIG. Figure 1 As shown in FIG, the lens contamination compensation method of the oil smoke sensor specifically includes:

[0053] Step 101: Obtain the AD value output by the oil smoke sensor every preset period.

[0054] Step 102: Calculate the lens contamination rate of the oil fume sensor according to the AD value.

[0055] In this step, the lens contamination rate is calculated as follows: P = (Z n -Z n-1 ) / Z0, P is the lens contamination rate, Z0 is the initial AD value recorded before the range hood is put into operation, Z n It is the AD value corresponding to the nth cycle recorded at every preset cycle after the range hood is running.

[0056] Step 103: Compensate the real-time AD value output by the oil fume sensor according to the lens contamination rate to obtain a corrected AD output value.

[0057] In this step, the calculation formula of the corrected AD output value is: Lg=(1+P)*L, Lg is the corrected AD output value, and L is the AD value output by the oil smoke sensor.

[0058] like Figure 2 As shown, the above step 101 specifically includes:

[0059] Step 1011: collect the AD value of the oil smoke sensor's emitting tube closed as a reference value, and collect the AD value of the oil smoke sensor's emitting tube open as a sampling value;

[0060] Step 1012: Acquire the real-time temperature, and convert the reference value and the sampled value into AD values ​​at a preset standard temperature and perform smoothing filtering to obtain the mean of the reference value and the mean of the sampled value;

[0061] Step 1013: The difference between the mean of the reference value and the mean of the sampling value is used as the AD value output by the oil smoke sensor.

[0062] In an optional embodiment, before the range hood works, the oil smoke sensor will record an initial AD value Z0, Z0 = X0-Y0, where X0 is the AD value collected ten times by the oil smoke sensor receiving tube when the transmitting tube is turned on. The recorded array {X 0-1 ,X 0-2 ...X 0-8 ,X 0-9 ,X 0-10}Remove the average of the maximum and minimum values; where Y0 is the AD value collected ten times by the receiving tube of the oil smoke sensor when the transmitting tube is turned off, and the recorded array {Y0-1 ,Y 0-2 ...Y 0-8 ,Y 0-9 ,Y 0-10}Remove the mean of the maximum and minimum values.

[0063] When the range hood has been running for 10 hours and has been turned off for 8 hours, the smoke sensor will record the first AD value Z1 = X1-Y1, where X1 is the value when the transmitter is turned on. The smoke sensor receiving tube collects ten AD values, and the recorded array {X 1-1 ,X 1-2 ...X 1-8 ,X 1-9 ,X 1-10}Remove the average of the maximum and minimum values; where Y1 is the AD value collected ten times by the receiving tube of the oil smoke sensor when the transmitting tube is turned off, and the recorded array {Y 1-1 ,Y 1-2 ...Y 1-8 ,Y 1-9 ,Y 1-10}Remove the mean of the maximum and minimum values.

[0064] Similarly, every preset period, the oil smoke sensor will record the AD value Z in the nth period. n =X n -Y n , where X n When developing the transmitting tube, the oil smoke sensor receiving tube collects AD values ​​ten times and the recorded array {X n-1 ,X n-2 ...X n-8 ,X n-9 ,X n-10} Remove the mean of the maximum and minimum values; where Y n When the transmitting tube is turned off, the receiving tube of the oil smoke sensor collects AD values ​​ten times, and the recorded array {Y n-1 , Y n-2 ...Y n-8 ,Y n-9 ,Y n-10}Remove the mean of the maximum and minimum values.

[0065] When the range hood is operated for 10 hours and shut down for 8 hours, the lens contamination rate P is calculated. n -Z n-1 ) / Z0, where Z n is the nth AD output value recorded by the oil smoke sensor in the current cycle, Z n-1=(n-1) is the AD output value recorded by the fume sensor during the previous cycle. When the range hood runs for another cycle, the sensor will calculate the lens contamination rate again. The calculated lens contamination rate is used to compensate the real-time AD value output by the fume sensor, resulting in a corrected AD output value, Lg = (1 + P) * L. Lg is the final AD output value corresponding to the fume concentration after lens compensation.

[0066] The lens contamination compensation method of the oil fume sensor of this embodiment effectively avoids temperature interference and solves the problem of temperature drift of the AD output value by compensating and correcting the AD output value of the oil fume sensor. At the same time, it solves the problem of external light interfering with the transmitting tube and receiving tube of the oil fume sensor, as well as the problem of detection failure caused by oil fume contamination of the lens, thereby improving the oil fume detection effect.

[0067] Example 2

[0068] This embodiment provides a control method for a range hood. Figure 3 This is a flow chart of a range hood control method provided in Example 2 of the present disclosure, as shown in FIG. Figure 3 As shown, the control method of the range hood includes:

[0069] Step 201: Based on the lens contamination compensation method for the oil fume sensor in Example 1, obtain the calibrated AD output value of the oil fume sensor;

[0070] Step 202 specifically includes:

[0071] Step 2021: When the AD output value is less than the preset minimum threshold, the range hood is controlled to operate at a low gear;

[0072] Step 2022: When the AD output value is not less than the minimum threshold and not greater than the preset maximum threshold, the range hood is controlled to operate at a medium gear;

[0073] Step 2023: When the AD output value is greater than the maximum threshold, the range hood is controlled to operate at a high gear.

[0074] In an optional embodiment, the AD output value Lg, after lens contamination compensation, is transmitted to the range hood's power board via UART communication. The power board compares the AD output value Lg with preset minimum and maximum thresholds to adjust the range hood's gear. In automatic adjustment mode, the range hood adjusts its gear according to the following method: When the range hood selects automatic mode, the first 5 seconds are set to high gear by default; when the AD output value Lg is less than 30 and lasts for 5 seconds, the range hood is controlled to operate at low gear; when the AD output value is 60 ≥ Lg ≥ 30 and lasts for 5 seconds, the range hood is controlled to operate at medium gear; and when the AD output value Lg is greater than 60 and lasts for 5 seconds, the range hood is controlled to operate at high gear.

[0075] The control method of the range hood of this embodiment achieves more accurate range hood gear adjustment by obtaining the calibrated AD output value of the oil smoke sensor and comparing it with a preset threshold value.

[0076] Example 3

[0077] This embodiment provides a lens contamination compensation system for a fume sensor, which can implement the lens contamination compensation method for the fume sensor in the above embodiment 1. Figure 4 This is a structural diagram of a lens contamination compensation system for a fume sensor provided in Example 3 of the present disclosure, as shown in FIG. Figure 4 As shown in the figure, the lens contamination compensation system of the oil smoke sensor includes:

[0078] Acquisition module 1, used to obtain the AD value of the oil smoke sensor output every preset period;

[0079] Calculation module 2, used for calculating the lens contamination rate of the oil smoke sensor according to the AD value;

[0080] The compensation module 3 is used to compensate the real-time AD value output by the oil smoke sensor according to the lens contamination rate to obtain a corrected AD output value.

[0081] In the specific implementation, the acquisition module 1 is specifically used to collect the AD value of the closed emitting tube of the oil fume sensor as the reference value, and collect the AD value of the open emitting tube of the oil fume sensor as the sampling value; then obtain the real-time temperature, and equate the reference value and the sampling value to the AD value at the preset standard temperature and perform smoothing filtering to obtain the reference value mean and the sampling value mean; finally, the difference between the reference value mean and the sampling value mean is used as the AD value output by the oil fume sensor.

[0082] In specific implementation, the calculation formula of lens contamination rate is: P = (Z n -Z n-1 ) / Z0. Where, P is the lens contamination rate, Z0 is the initial AD value recorded before the range hood is put into operation, and Z n It is the AD value corresponding to the nth cycle recorded at every preset cycle after the range hood is running.

[0083] In a specific implementation, the calculation formula of the corrected AD output value is: Lg=(1+P)*L, where Lg is the corrected AD output value and L is the AD value output by the oil smoke sensor.

[0084] The lens contamination compensation system of the oil fume sensor of this embodiment effectively avoids temperature interference and solves the problem of temperature drift of the AD output value by compensating and correcting the AD output value of the oil fume sensor. At the same time, it solves the problem of external light interfering with the transmitting tube and receiving tube of the oil fume sensor, as well as the problem of detection failure caused by oil fume contamination of the lens, thereby improving the oil fume detection effect.

[0085] Example 4

[0086] This embodiment provides a range hood control system that can implement the range hood control method in the above embodiment 2. Figure 5 This is a structural diagram of a range hood control system provided in Example 4 of the present disclosure, as shown in FIG. Figure 5 As shown in the figure, the control system of the range hood includes:

[0087] Output module 4, used for obtaining the AD output value of the oil fume sensor after correction based on the lens contamination compensation system of the oil fume sensor in Example 3;

[0088] The control module 5 is used to compare the AD output value with the preset minimum and maximum thresholds to adjust the range hood gear, specifically including:

[0089] The first control unit 51 is configured to control the range hood to operate at a low gear when the AD output value is less than a minimum threshold;

[0090] The second control unit 52 is configured to control the range hood to operate at a mid-range speed when the AD output value is not less than a minimum threshold and not greater than a maximum threshold;

[0091] The third control unit 53 is used to control the range hood to operate at a strong gear when the AD output value is greater than a maximum threshold.

[0092] The control system of the range hood of this embodiment achieves more accurate range hood gear adjustment by obtaining the calibrated AD output value of the oil fume sensor and comparing it with a preset threshold value.

[0093] Example 5

[0094] This embodiment provides an electronic device, Figure 6 This is a structural diagram of an electronic device provided in Example 5 of the present disclosure. The electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the lens contamination compensation method for the oil fume sensor in Example 1 and the range hood control method in Example 2 are implemented. Figure 6 The electronic device 50 shown is only an example and should not limit the functionality and scope of use of the embodiments of the present disclosure. Figure 6As shown, the electronic device 50 may be a general-purpose computing device, such as a server device. Components of the electronic device 50 may include, but are not limited to, the at least one processor 51, the at least one memory 52, and a bus 53 connecting different system components (including the memory 52 and the processor 51).

[0095] The bus 53 includes a data bus, an address bus, and a control bus.

[0096] The memory 52 may include a volatile memory, such as a random access memory (RAM) 521 and / or a cache memory 522 , and may further include a read-only memory (RAM) 523 .

[0097] The memory 52 may also include a program tool 525 (or utility) having a set (at least one) of program modules 524, such program modules 524 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0098] The processor 51 executes various functional applications and data processing by running computer programs stored in the memory 52, such as the lens contamination compensation method of the oil fume sensor in the above-mentioned embodiment 1 and the range hood control method in embodiment 2.

[0099] The electronic device 50 may also communicate with one or more external devices 54. Such communication may be performed via an input / output (I / O) interface 55. Furthermore, the model generating electronic device 50 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 56. Figure 6 As shown, the network adapter 56 communicates with other modules of the electronic device 50 via the bus 53. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the electronic device 50, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (RAID) systems, tape drives, and data backup storage systems.

[0100] It should be noted that although several units / modules or sub-units / modules of the electronic device are mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided and embodied by multiple units / modules.

[0101] Example 6

[0102] This embodiment provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the lens contamination compensation method for the oil fume sensor in the above-mentioned embodiment 1 and the range hood control method in the above-mentioned embodiment 2 are implemented.

[0103] The readable storage medium may include, but is not limited to, a portable disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0104] In a possible implementation, the present disclosure can also be implemented in the form of a program product, which includes program code. When the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps in the lens contamination compensation method for the oil fume sensor in the above-mentioned Example 1 and the control method for the range hood in Example 2.

[0105] The program code for executing the present disclosure may be written in any combination of one or more programming languages, and may be executed entirely on the user device, partially on the user device, as a standalone software package, partially on the user device and partially on a remote device, or entirely on the remote device.

[0106] While specific embodiments of the present disclosure have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present disclosure is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present disclosure, and such changes and modifications are intended to fall within the scope of protection of the present disclosure.

Claims

1. A method for compensating lens contamination of a fume sensor, characterized in that: The method comprises: Obtaining the AD value of the oil smoke sensor output at every preset period; Calculate the lens contamination rate of the oil smoke sensor according to the AD value; Compensating the real-time AD value output by the oil smoke sensor according to the lens contamination rate to obtain a corrected AD output value; The step of obtaining the AD value output by the oil smoke sensor at every preset period specifically includes: Collecting the AD value of the oil smoke sensor's emitting tube off as a reference value, and collecting the AD value of the oil smoke sensor's emitting tube on as a sampling value; Acquire the real-time temperature, and convert the reference value and the sampled value into AD values ​​at a preset standard temperature and perform smoothing filtering to obtain the mean of the reference value and the mean of the sampled value; Taking the difference between the mean of the reference values ​​and the mean of the sampling values ​​as the AD value output by the oil smoke sensor; The calculation formula of the lens contamination rate is: P=(Z n -Z n-1 ) / Z0; Wherein, P is the lens contamination rate, Z0 is the initial AD value recorded before the range hood is operated, and Z n The AD value corresponding to the nth period recorded at every preset period after the range hood is running; The calculation formula of the corrected AD output value is: Lg=(1+P)*L; Wherein, Lg is the AD output value after correction, and L is the AD value output by the oil smoke sensor.

2. A range hood control method, characterized in that: The method comprises: Based on the lens contamination compensation method of the oil fume sensor according to claim 1, obtaining the AD output value of the oil fume sensor after correction; When the AD output value is less than a preset minimum threshold, the range hood is controlled to operate at a low gear; When the AD output value is not less than the minimum threshold and not greater than the preset maximum threshold, controlling the range hood to operate at a mid-range speed; When the AD output value is greater than the maximum threshold, the range hood is controlled to operate at a high gear.

3. A lens contamination compensation system for a fume sensor, characterized in that: The system comprises: The acquisition module is used to obtain the AD value output by the oil smoke sensor at every preset period; A calculation module, configured to calculate a lens contamination rate of the oil smoke sensor according to the AD value; A compensation module, configured to compensate the real-time AD value output by the oil smoke sensor according to the lens contamination rate to obtain a corrected AD output value; The acquisition module is specifically used for: Collecting the AD value of the oil smoke sensor's emitting tube off as a reference value, and collecting the AD value of the oil smoke sensor's emitting tube on as a sampling value; Acquire the real-time temperature, and convert the reference value and the sampled value into AD values ​​at a preset standard temperature and perform smoothing filtering to obtain the mean of the reference value and the mean of the sampled value; Taking the difference between the mean of the reference values ​​and the mean of the sampling values ​​as the AD value output by the oil smoke sensor; The calculation formula of the lens contamination rate is: P=(Z n -Z n-1 ) / Z0; Wherein, P is the lens contamination rate, Z0 is the initial AD value recorded before the range hood is operated, and Z n The AD value corresponding to the nth period recorded at every preset period after the range hood is running; The calculation formula of the corrected AD output value is: Lg=(1+P)*L; Wherein, Lg is the AD output value after correction, and L is the AD value output by the oil smoke sensor.

4. A range hood control system, characterized in that: The system comprises: an output module, configured to obtain the calibrated AD output value of the oil fume sensor based on the lens contamination compensation system of the oil fume sensor according to claim 3; A control module is used to compare the AD output value with a preset minimum threshold and a preset maximum threshold, thereby adjusting the gear position of the range hood. The control module specifically includes: a first control unit, configured to control the range hood to operate at a low gear when the AD output value is less than the minimum threshold; a second control unit, configured to control the range hood to operate at a mid-range when the AD output value is not less than the minimum threshold and not greater than the maximum threshold; The third control unit is used to control the range hood to operate at a strong gear when the AD output value is greater than the maximum threshold.

Images