Anti-backflow control method, control device, control system and storage medium

Abstract

The invention discloses an anti-backflow control method, an anti-backflow control device, an anti-backflow control system and a computer readable storage medium, and belongs to the field of kitchen appliances. The anti-backflow control method provided by the embodiment of the invention is applied to the range hood. The range hood comprises a smoke sensor and a fan. The smoke sensor is used for sampling and detecting the smoke concentration value in the range hood. The anti-backflow control method comprises the following steps: acquiring a first smoke concentration value detected by a smoke sensor in a first sampling period; acquiring a smoke concentration average value corresponding to each smoke concentration value detected by the smoke sensor in each sampling period; and according to the smoke concentration value and the smoke concentration average value, the working state of the draught fan is controlled, and the working state is larger than or equal to 1. Therefore, the working state of the fan can be accurately controlled, so that the effect of discharging the backward flowing oil smoke is achieved.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and in particular to an anti-backflow control method, an anti-backflow control device, an anti-backflow control system, and a computer-readable storage medium. Background Technology

[0002] With the widespread adoption of centralized smoke extraction systems in high-rise buildings, the problem of backflow of cooking fumes has become increasingly prominent, posing a significant challenge for residents. Although current range hoods are equipped with mechanical devices such as backflow preventers at their outlets, the diffusion effect of gas molecules and the difficulty in achieving a completely seamless seal limit their effectiveness in preventing backflow. Furthermore, these devices inevitably accumulate cooking fumes over long-term use, leading to unpredictable opening and closing mechanisms and ultimately affecting their backflow prevention performance. Summary of the Invention

[0003] This application provides an anti-backflow control method, an anti-backflow control device, an anti-backflow control system, and a computer-readable storage medium to solve at least one of the aforementioned technical problems.

[0004] The backflow prevention control method of this application is applied to a smoke hood, which includes a smoke sensor and a fan. The smoke sensor is used to sample and detect the smoke concentration value inside the smoke hood. The backflow prevention control method includes: Acquire smoke sensor at the first The first sampling period obtained by detection Individual smoke concentration values; Acquire smoke sensor Detected in each sampling period The average smoke concentration corresponding to each smoke concentration value; According to the The operating status of the fan is controlled by individual smoke concentration values ​​and the average smoke concentration. ≥1.

[0005] The backflow prevention control method of the embodiments of this application, according to the first... Smoke concentration values ​​for each sampling period and The average smoke concentration corresponding to each sampling period can accurately control the working status of the fan to achieve the effect of expelling backflowing fumes.

[0006] In some implementations, the smoke sensor acquires the smoke. Detected in each sampling period The average smoke concentration corresponding to each smoke concentration value includes: Acquire smoke sensor Detected in each sampling period Individual smoke concentration values; Based on the smoke sensor in the The first sampling period obtained by detection The smoke concentration value, the smoke sensor at the first The first sampling period obtained by detection The smoke concentration value, the smoke sensor at the first The first sampling period obtained by detection The smoke concentration value, the smoke sensor at the first The first sampling period obtained by detection The smoke concentration value, the smoke sensor at the first The first sampling period obtained by detection The smoke concentration value was corrected. Individual smoke concentration values; In revising the After each smoke concentration value, according to Each smoke concentration value determines the average smoke concentration, where, ≥3, 3≤ ≤ .

[0007] In the above technical solution, the smoke concentration value is corrected by combining the two previous and two subsequent sampling values ​​at the current sampling time, and then used to calculate the average smoke concentration. This corrects outliers in the smoke sensor sampling process, making subsequent control more accurate and significantly reducing frequent fan start-up and shutdown caused by misjudgments.

[0008] In some implementations, based on the smoke sensor in the first... The first sampling period obtained by detection The smoke concentration value, the smoke sensor at the first The first sampling period obtained by detection The smoke concentration value, the smoke sensor at the first The first sampling period obtained by detection The smoke concentration value, the smoke sensor at the first The first sampling period obtained by detection The smoke concentration value, the smoke sensor at the first The first sampling period obtained by detection The smoke concentration value was corrected. Each smoke concentration value includes: Based on the smoke sensor in the The first sampling period obtained by detection The smoke concentration value, the smoke sensor at the first The first sampling period obtained by detection The smoke concentration value, the smoke sensor at the first The first sampling period obtained by detection The smoke concentration value is used to determine the first... The first smoke concentration correction value corresponding to each smoke concentration value; At least based on smoke sensors in the first The first sampling period obtained by detection The smoke concentration value, the smoke sensor at the first The first sampling period obtained by detection The smoke concentration value is used to determine the first... The second smoke concentration correction value corresponding to each smoke concentration value; Determine the smoke sensor at the first The first sampling period obtained by detection Does the smoke concentration value fall within the range of the first smoke concentration correction value and the second smoke concentration correction value?

[0009] When the When a smoke concentration value does not fall within the range of the first smoke concentration correction value and the second smoke concentration correction value, the smoke concentration correction value is determined based on the first smoke concentration correction value and the second smoke concentration correction value. Correcting the first based on smoke concentration correction value Each smoke concentration value.

[0010] In the above technical solution, the first two and last two sampled values ​​at the current sampling time are used to fit two linear curves. When the current sampled value does not fall within the range of the calculated values ​​of the linear curves containing the first two and last two sampled values, the smoke concentration correction value is determined based on the calculated values ​​of the linear curves containing the first two and last two sampled values. This process not only ensures that it conforms to the overall trend of smoke concentration, but also effectively reduces errors and greatly reduces the possibility of misjudgment. In this way, the working state of the fan can be accurately controlled to achieve the effect of exhausting backflowing fumes.

[0011] In some implementations, determining the smoke concentration correction value based on a first smoke concentration correction value and a second smoke concentration correction value includes: The average of the first smoke concentration correction value and the second smoke concentration correction value is used as the smoke concentration correction value.

[0012] In the above technical solution, the average of the first smoke concentration correction value and the second smoke concentration correction value is taken as the smoke concentration correction value, which can better correct the smoke concentration, reduce data errors, and thus reduce the possibility of misjudgment.

[0013] In some embodiments, the operating speed of the fan includes a first speed and a second speed, where the operating power corresponding to the first speed is lower than the operating power corresponding to the second speed, according to the... Individual smoke concentration values ​​and average smoke concentration values ​​are used to control the operating status of the fan, including: Judge the first Is the difference in smoke concentration between a single smoke concentration value and the average smoke concentration greater than a predetermined concentration difference? When the difference in smoke concentration exceeds a predetermined difference, the fan is controlled to run at the first speed for a predetermined duration.

[0014] In the above technical solution, when the difference in smoke concentration is greater than the predetermined difference in concentration, the controller first controls the fan to run at a low speed for a period of time to prevent further backflow of external oil fumes and to discharge the backflowed oil fumes, which effectively reduces noise and lowers energy consumption.

[0015] In some embodiments, after the fan is operated at the first speed for a first predetermined period of time, the backflow prevention control method further includes: Obtain the first current smoke concentration value detected by the smoke sensor; Determine whether the current smoke concentration value is greater than the predetermined smoke concentration value; When the current smoke concentration value is greater than the predetermined smoke concentration value, the fan is controlled to operate at the second speed.

[0016] In the above technical solution, when the first current smoke concentration value is greater than the predetermined smoke concentration value, the control fan switches to high-speed operation to prevent further backflow of external oil fumes and to ensure that the backflowed oil fumes are discharged.

[0017] In some implementations, after controlling the fan to operate at the second speed, the backflow prevention control method further includes: Obtain the second current smoke concentration value detected by the smoke sensor; Determine whether the current smoke concentration value is less than the predetermined smoke concentration value; When the second current smoke concentration value is less than the predetermined smoke concentration value, the control fan runs at the second speed for the second predetermined time.

[0018] In the above technical solution, when the second current smoke concentration value is less than the predetermined smoke concentration value, the fan is still controlled to run at high speed for a period of time. That is to say, after blowing the backflowing fumes back into the flue, the fan continues to run for a period of time before being turned off, thus preventing the backflowing fumes from flowing back again.

[0019] The backflow prevention control device of this application is applied to a smoke hood. The smoke hood includes a smoke sensor and a fan. The smoke sensor is used to sample and detect the smoke concentration value inside the smoke hood. The backflow prevention control device includes: The first acquisition module is used to acquire information from the smoke sensor at the [number]th [time period]. The first sampling period obtained by detection Individual smoke concentration values; The second acquisition module is used to acquire information from the smoke sensor. Detected in each sampling period The average smoke concentration corresponding to each smoke concentration value; Control module, used to determine the first The operating status of the fan is controlled by individual smoke concentration values ​​and the average smoke concentration. ≥1.

[0020] The backflow prevention control system of this application includes one or more processors and a memory. The memory stores a computer program. When the computer program is executed by the processor, it implements the backflow prevention control method of any of the above embodiments.

[0021] The computer-readable storage medium of the present application embodiment stores a computer program thereon, which, when executed by a processor, implements the anti-backflow control method of any of the above embodiments.

[0022] The backflow prevention control method, backflow prevention control device, backflow prevention control system, and computer-readable storage medium of this application, according to the [relevant document / section], are based on the [relevant document / section]. Smoke concentration values ​​for each sampling period and The average smoke concentration corresponding to each sampling period can accurately control the working status of the fan to achieve the effect of expelling backflowing fumes.

[0023] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein: Figure 1 This is a flowchart illustrating the backflow prevention control method according to certain embodiments of this application; Figure 2 This is a schematic diagram of a smoke hood according to certain embodiments of this application; Figure 3 This is a flowchart illustrating the backflow prevention control method according to certain embodiments of this application; Figure 4 This is a flowchart illustrating the backflow prevention control method according to certain embodiments of this application; Figure 5 This is a schematic diagram of the anti-backflow control device according to certain embodiments of this application; Figure 6 This is a schematic diagram of the anti-backflow control system according to certain embodiments of this application; Figure 7 is a connection state diagram of the computer readable storage medium and the processor of some embodiments of the present application.

[0025] Reference Signs List: Anti-backflow control device 100, first acquisition module 10, second acquisition module 20, control module 30, anti-backflow control system 200, processor 210, memory 220, computer readable storage medium 300, computer program 310, processor 320, range hood 1000, smoke sensor 1001, controller 1002, fan 1003. DETAILED DESCRIPTION

[0026] The embodiments of the present application are further described below with reference to the accompanying drawings. The same or similar reference signs are used throughout the drawings to represent the same or similar elements or elements having the same or similar functions. In addition, the embodiments of the present application described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present application, and cannot be understood as a limitation on the present application.

[0027] Referring to Figures 1 to 3 , the anti-backflow control method of the embodiments of the present application is applied to a range hood 1000. The range hood 1000 includes a smoke sensor 1001 and a fan 1003. The smoke sensor 1001 is used to sample and detect the smoke concentration value inside the range hood 1000. The anti-backflow control method includes: S10: obtaining the first smoke concentration value detected by the smoke sensor 1001 in the first sampling period; S20: obtaining the smoke concentration average value corresponding to the smoke concentration value detected by the smoke sensor 1001 in the second sampling period; S30: controlling the working state of the fan 1003 according to the first smoke concentration value and the smoke concentration average value, wherein ≥1. The anti-backflow control method of the embodiments of the present application can accurately control the working state of the fan 1003 according to the smoke concentration value in the first sampling period and the smoke concentration average value corresponding to the second sampling period, so as to achieve the effect of discharging backflow oil fume. Specifically, referring to , the range hood 1000 can include a smoke sensor 1001, a controller 1002 and a fan 1003.

[0028] The anti-backflow control method of the embodiments of the present application can accurately control the working state of the fan 1003 according to the smoke concentration value in the first sampling period and the smoke concentration average value corresponding to the second sampling period, so as to achieve the effect of discharging backflow oil fume. Specifically, referring to , the range hood 1000 can include a smoke sensor 1001, a controller 1002 and a fan 1003.

[0029] Figure 2 The anti-backflow control method of the embodiments of the present application can accurately control the working state of the fan 1003 according to the smoke concentration value in the first sampling period and the smoke concentration average value corresponding to the second sampling period, so as to achieve the effect of discharging backflow oil fume.

[0030] ​​​The smoke sensor 1001 is used as a detection device, and the smoke sensor 1001 is electrically connected with the controller 1002. The smoke sensor 1001 is used to detect the smoke concentration value inside the smoke machine 1000. The smoke sensor 1001 is arranged inside the smoke machine 1000, for example, arranged before the check valve of the smoke machine 1000, to realize real-time and accurate sensing of the smoke concentration change inside the smoke machine 1000. In some examples, the smoke sensor 1001 can adopt a photoelectric smoke sensor or an ion type smoke sensor, and the specific type can be determined according to actual application requirements.

[0031] The controller 1002 can be a microcontroller unit (MCU). The controller 1002 is used as a control system, and the controller 1002 is electrically connected with an external power supply. The controller 1002 is used to obtain the smoke concentration value detected by the smoke sensor 1001, and use the smoke concentration value detected by the smoke sensor 1001 in combination with a related algorithm to determine whether the oil fume backflow exists in the smoke machine 1000, and then send a control instruction to the fan 1003 to control the working state of the fan 1003. For example, the fan 1003 is controlled to be turned on or turned off.

[0032] The fan 1003 is used as an execution mechanism, and the fan 1003 is electrically connected with the controller 1002. When receiving the control instruction sent by the controller 1002, the fan 1003 quickly responds and performs corresponding actions. For example, when the oil fume backflow exists in the smoke machine 1000, the controller 1002 sends an opening instruction to the fan 1003 to control the fan 1003 to be turned on. The fan 1003 is immediately started to change the pressure condition inside the smoke machine 1000 by generating a strong airflow, form a reverse airflow barrier to prevent further backflow of external oil fume, and discharge the backflow oil fume.

[0033] The working process of the backflow prevention control method of the embodiment of the application will be introduced below in combination with specific examples: Firstly, the chip of the controller 1002 is initialized. Through the initialization operation, a stable and known working environment can be created for the chip, and it is ensured that the registers, clock, interrupt system and other functional modules inside the chip are in a default and predictable state, to lay a foundation for the normal operation of the subsequent program.

[0034] Then, the smoke sensor 1001 continuously monitors the smoke concentration inside the smoke machine 1000, and samples the smoke concentration value inside the smoke machine 1000. In an example, the sampling period can be 0.5 seconds.

[0035] After the smoke sensor 1001 samples the smoke concentration value, the controller 1002 obtains the first smoke concentration value detected by the smoke sensor 1001 in the first sampling period. After the smoke sensor 1001 samples the smoke concentration value, the controller 1002 obtains the first smoke concentration value detected by the smoke sensor 1001 in the first sampling period.​ And acquire smoke sensor 1001 in Detected in each sampling period Each smoke concentration value ( , , ... , The average smoke concentration corresponding to ) .by Taking a value of 10 as an example, the controller 1002 acquires the 11th smoke concentration value detected by the smoke sensor 1001 in the 11th sampling period. And to obtain 10 smoke concentration values ​​detected by the smoke sensor 1001 in 10 sampling periods ( , , ... , The average smoke concentration corresponding to ) .

[0036] Controller 1002 compares and analyzes the first Smoke concentration values ​​for each sampling period and Average smoke concentration for each sampling period The controller 1002 controls the operating status of the fan 1003. For example, the controller 1002 can adjust the smoke concentration value based on the 11th sampling period mentioned above. The average smoke concentration corresponding to the above 10 sampling periods The relevant algorithms are used to calculate whether there is backflow of oil fumes in the range hood 1000, so as to accurately control the working status of the fan 1003.

[0037] After comparative analysis, if it is determined that there is backflow of oil fumes from the range hood 1000, the controller 1002 can send an activation command to the fan 1003 to control the fan 1003 to start. The fan 1003 will then start to generate sufficient airflow to counteract the backflow pressure, preventing further backflow of external oil fumes and expelling the backflowed oil fumes. After the backflow of oil fumes from the range hood 1000 is expelled, the controller 1002 can send a shutdown command to the fan 1003 to control the range hood 1000 to shut down. The fan 1003 will then stop running to save power.

[0038] In related technologies, mechanical devices such as check valves are installed at the air outlet of range hoods to prevent backflow of cooking fumes. However, due to the diffusion effect of gas molecules and the difficulty in achieving a completely seamless seal at the air outlet, these devices still have certain limitations in preventing backflow of cooking fumes. Furthermore, these devices inevitably accumulate cooking fumes during long-term use, leading to uncertainty in their opening and closing function, thus affecting their backflow prevention effectiveness.

[0039] In this embodiment, the operating state of the fan 1003 is controlled based on the smoke concentration value detected by the smoke sensor 1001 to prevent backflow of oil fumes. This embodiment does not rely on physical obstruction; regardless of the presence of gas molecule diffusion effects, sealing performance, or opening / closing functions, the smoke sensor 1001 can detect any abnormal change in smoke concentration inside the range hood 1000 and analyze the results. Smoke concentration values ​​for each sampling period and Average smoke concentration for each sampling period Precisely control the working status of fan 1003.

[0040] Among them, the Smoke concentration values ​​for each sampling period It provides real-time smoke concentration information; Average smoke concentration for each sampling period This can reflect the overall level of smoke concentration over a period of time, reducing the possible errors or fluctuations in a single sampling value. Based on the instantaneous smoke concentration value and the average concentration value over a period of time, it is possible to grasp the changes in smoke concentration more comprehensively and accurately, determine whether there is backflow of oil fumes into the smoke hood 1000, and thus achieve precise control of the working status of the fan 1003, avoiding misjudgments and unnecessary switching of the fan 1003 status that may occur when controlling based on a single concentration value.

[0041] Please see Figure 3 In some embodiments, when the smoke sensor 1001 acquires the smoke sensor's signal at the first... The first sampling period obtained by detection Before reaching a certain smoke concentration value, backflow prevention control methods also include: Determine if the smoke sensor 1001 is faulty; When the smoke sensor 1001 malfunctions, a fault code is displayed to alert the user; If the smoke sensor 1001 is not faulty, proceed to acquire the data of the smoke sensor 1001 in the first... The first sampling period obtained by detection The steps for calculating smoke concentration values.

[0042] Specifically, after the chip is initialized and before the smoke sensor 1001 samples and detects the smoke concentration value inside the smoke hood 1000, the smoke sensor 1001 can also be used to diagnose the fault.

[0043] Fault diagnosis of the smoke sensor 1001 includes determining whether the communication between the smoke sensor 1001 and the controller 1002 is normal. It is understood that if the smoke sensor 1001 is not properly connected (e.g., physically disconnected) or there is a communication fault (e.g., communication protocol mismatch, line interference, etc.), the communication between the smoke sensor 1001 and the controller 1002 will be abnormal, and the controller 1002 will subsequently be unable to obtain the smoke concentration value sampled and detected by the smoke sensor 1001. Therefore, in one example, the controller 1002 can send a test command to the smoke sensor 1001 to determine whether the communication between the smoke sensor 1001 and the controller 1002 is normal.

[0044] When communication between the smoke sensor 1001 and the controller 1002 malfunctions, a fault code can be displayed on the control panel of the range hood 1000 to alert the user. For example, if the smoke sensor 1001 is not properly connected, fault code E01 will flash on the control panel of the range hood 1000; or, if the communication protocol between the smoke sensor 1001 and the controller 1002 is incompatible, fault code E02 will be displayed on the control panel of the range hood 1000, while the indicator light flashes red and blue alternately. This allows for quick problem identification and prompts the user to repair or replace the smoke sensor 1001.

[0045] Please see Figure 4 In some embodiments, the smoke sensor 1001 acquires the smoke sensor 1001 in Detected in each sampling period The average smoke concentration corresponding to each smoke concentration value includes: Obtain smoke sensor 1001 in Detected in each sampling period Individual smoke concentration values; Based on smoke sensor 1001 in the The first sampling period obtained by detection The smoke concentration value, smoke sensor 1001 in the first The first sampling period obtained by detection The smoke concentration value, smoke sensor 1001 in the first The first sampling period obtained by detection The smoke concentration value, smoke sensor 1001 in the first The first sampling period obtained by detection The smoke concentration value, smoke sensor 1001 in the first The first sampling period obtained by detection The smoke concentration value was corrected. Individual smoke concentration values; In revising the After each smoke concentration value, according to Each smoke concentration value determines the average smoke concentration, where, ≥3, 3≤ ≤ .

[0046] Specifically, the controller 1002 acquires data from the smoke sensor 1001. Detected in each sampling period Each smoke concentration value ( , , ). For the first one individual smoke concentration values Based on the first individual smoke concentration values , No. individual smoke concentration values , No. individual smoke concentration values , No. individual smoke concentration values , No. individual smoke concentration values , amend the individual smoke concentration values .

[0047] It is understandable that 3≤ ≤ That is to say, the first individual smoke concentration values It can be ( ... , Any smoke concentration value from the given list. Complete the first... individual smoke concentration values After the correction, then according to Each smoke concentration value ( , , ... , Determine the average smoke concentration. The calculation formula is as follows:

[0048] The working process of the backflow prevention control method according to the embodiments of this application will be described below with specific examples. Continuing from the aforementioned... For example, =10.

[0049] First, the smoke sensor 1001 is initialized. Initialization performs zeroing, zero-point offset elimination, and temperature compensation for the smoke sensor 1001, ensuring the reliability of subsequent sampling and detection.

[0050] Then, the controller 1002 acquires 12 smoke concentration values ​​detected by the smoke sensor 1001 in 12 sampling periods. , , ... , ).

[0051] when When =3, based on , , , , Correction .

[0052] when When =4, based on , , , , Correction .

[0053] And so on, when When =10, based on , , , , Correction .

[0054] Complete each smoke concentration value After the correction process, based on 10 smoke concentration values ​​( , , ... , Determine the average smoke concentration. .

[0055] It is understandable that the smoke sensor 1001 is in Detected in each sampling period The smoke concentration value may be erroneous due to various reasons, and it is unreasonable to directly use it to calculate the average value of smoke concentration. In the embodiment of the application, the controller 1002 corrects the smoke concentration value in combination with the previous two sampling values and the subsequent two sampling values at the current sampling time, and then uses it to calculate the average value of smoke concentration. In this way, the abnormal value (wild value) in the sampling process of the smoke sensor 1001 is corrected, so that the subsequent control is more accurate, and the frequent opening and closing of the fan 1003 caused by misjudgment is greatly reduced.

[0056] Please refer to Figure 4 In some embodiments, based on the first smoke concentration value detected by the smoke sensor 1001 in the first sampling period, the second smoke concentration value detected by the smoke sensor 1001 in the second sampling period, the third smoke concentration value detected by the smoke sensor 1001 in the third sampling period, the fourth smoke concentration value detected by the smoke sensor 1001 in the fourth sampling period, the fifth smoke concentration value detected by the smoke sensor 1001 in the fifth sampling period, and the sixth smoke concentration value detected by the smoke sensor 1001 in the sixth sampling period, the first smoke concentration value is corrected, including: The first smoke concentration value is corrected, including: Based on the first smoke concentration value detected by the smoke sensor 1001 in the first sampling period, the second smoke concentration value detected by the smoke sensor 1001 in the second sampling period, the third smoke concentration value detected by the smoke sensor 1001 in the third sampling period, the fourth smoke concentration value detected by the smoke sensor 1001 in the fourth sampling period, the fifth smoke concentration value detected by the smoke sensor 1001 in the fifth sampling period, and the sixth smoke concentration value detected by the smoke sensor 1001 in the sixth sampling period, the first smoke concentration value is corrected, including: The first smoke concentration value is corrected, including: Based on the first smoke concentration value detected by the smoke sensor 1001 in the first sampling period, the second smoke concentration value detected by the smoke sensor 1001 in the second sampling period, the third smoke concentration value detected by the smoke sensor 1001 in the third sampling period, the fourth smoke concentration value detected by the smoke sensor 1001 in the fourth sampling period, the fifth smoke concentration value detected by the smoke sensor 1001 in the fifth sampling period, and the sixth smoke concentration value detected by the smoke sensor 1001 in the sixth sampling period, the first smoke concentration value is corrected, including: The first smoke concentration value is corrected, including: The first smoke concentration value is corrected, including: ​​​​​​​​​​​​​​​​​​​​​Does the smoke concentration value fall within the range of the first smoke concentration correction value and the second smoke concentration correction value?

[0057] When the When a smoke concentration value does not fall within the range of the first smoke concentration correction value and the second smoke concentration correction value, the smoke concentration correction value is determined based on the first smoke concentration correction value and the second smoke concentration correction value. Correcting the first based on smoke concentration correction value Each smoke concentration value.

[0058] Specifically, with Taking =n as an example, for the nth individual smoke concentration values The proposed amendments are as follows: (1) Based on the first individual smoke concentration values , No. individual smoke concentration values , No. individual smoke concentration values Determine the first individual smoke concentration values The corresponding first smoke concentration correction value .

[0059] In some embodiments, the first smoke concentration correction value The calculation formula is shown in the following example:

[0060] in, The sampling period is for The time value of each sampling period for The time value of each sampling period for The formula can be understood as: calculating the time value of the sampling period. The sampling period in the ... The sampling period and the first The smoke concentration value corresponding to each sampling period on the linear curve is the first smoke concentration correction value. .

[0061] (2) At least based on the first individual smoke concentration values , No. individual smoke concentration values Determine the first individual smoke concentration values The corresponding second smoke concentration correction value .

[0062] In one embodiment, based only on the first individual smoke concentration values , No. individual smoke concentration values Determine the first individual smoke concentration values The corresponding second smoke concentration correction value The calculation formula is shown in the following example:

[0063] In another embodiment, based on the first individual smoke concentration values , No. individual smoke concentration values , No. individual smoke concentration values Determine the first individual smoke concentration values The corresponding second smoke concentration correction value The calculation formula is shown in the following example:

[0064] In the two embodiments described above, The sampling period is for The time value of each sampling period for The time value of each sampling period; for The time value of the sampling period. The above formula can be understood as: calculating the time value of the sampling period. The sampling period in the ... The sampling period and the first The smoke concentration value corresponding to each sampling period on the linear curve is the second smoke concentration correction value. .

[0065] Determine the first smoke concentration correction value Second smoke concentration correction value Then, determine the first individual smoke concentration values Does it fall within the first smoke concentration correction value? Second smoke concentration correction value Within the interval. If the first individual smoke concentration values It did not fall within the first smoke concentration correction value. Second smoke concentration correction value Within that range, that is to say, or If this is not true, then it is necessary to check the first... individual smoke concentration values Make corrections. At this point, based on the first smoke concentration correction value... Second smoke concentration correction value The smoke concentration correction value is determined by comprehensively considering all factors. Then, the smoke concentration correction value is used to adjust the... individual smoke concentration values .

[0066] The following example demonstrates how to determine whether the first... individual smoke concentration values The process of making the corrections will be explained. As mentioned above... For example, =10.

[0067] when When =3, calculate in and Smoke concentration value on the linear curve Simultaneously calculate in and Smoke concentration value on the linear curve ,judge or Is it true? If not, then based on... and Correction If true, then false. Make corrections.

[0068] when When =4, calculate in and Smoke concentration value on the linear curve Simultaneously calculate in Smoke concentration value on the linear curve ,judge or Is it true? If not, then based on... and Correction If true, then false. Make corrections.

[0069] And so on, when When =10, calculate in and Smoke concentration value on the linear curve Simultaneously calculate in Smoke concentration value on the linear curve ,judge or Whether it is valid or not. If it is not valid, then it is based on Correction If true, then false. Make corrections.

[0070] Complete each smoke concentration value After the correction process, based on 10 smoke concentration values ​​( , , ... , Determine the average smoke concentration. .

[0071] It's understandable, if If the smoke concentration falls within the range of the first smoke concentration correction value and the second smoke concentration correction value, then no adjustment is needed. Make corrections, number individual smoke concentration values It can be directly used to determine the average smoke concentration. .

[0072] In this embodiment, the first two and last two sampled values ​​at the current sampling time are fitted into two linear curves. When the current sampled value does not fall within the range of the calculated values ​​of the linear curves containing the first two and last two sampled values, the smoke concentration correction value is determined based on the calculated values ​​of the linear curves containing the first two and last two sampled values. This process not only ensures that it conforms to the overall trend of smoke concentration, but also effectively reduces errors and greatly reduces the possibility of misjudgment. As a result, the working state of the fan 1003 can be accurately controlled to achieve the effect of exhausting backflowing fumes.

[0073] Please see Figure 4 In some embodiments, determining the smoke concentration correction value based on a first smoke concentration correction value and a second smoke concentration correction value includes: The average of the first smoke concentration correction value and the second smoke concentration correction value is used as the smoke concentration correction value.

[0074] Specifically, the first value after correction based on smoke concentration correction value individual smoke concentration values That is:

[0075] In this embodiment of the application, the average value of the first smoke concentration correction value and the second smoke concentration correction value is taken as the smoke concentration correction value, which can better correct the smoke concentration, reduce data errors, and thus reduce the possibility of misjudgment.

[0076] Please see Figure 3In some embodiments, the operating positions of the fan 1003 include a first position and a second position. The operating power corresponding to the first position is lower than the operating power corresponding to the second position. According to the... The smoke concentration value and the average smoke concentration are used to control the operating status of the fan 1003, including: Judge the first Is the difference in smoke concentration between a single smoke concentration value and the average smoke concentration greater than a predetermined concentration difference? When the difference in smoke concentration is greater than the predetermined difference in concentration, the control fan 1003 is operated at the first gear for a first predetermined time.

[0077] Specifically, the operating positions of the fan 1003 include a first position and a second position. The operating power corresponding to the first position is lower than that corresponding to the second position. The first position can be a low position (speed range, for example, 1200-2200 rpm), and the second position can be a high position (speed range, for example, 3200-4500 rpm).

[0078] Controller 1002 calculates the first individual smoke concentration values With average smoke concentration The difference in smoke concentration between When the difference in smoke concentration When the concentration difference is greater than the predetermined concentration difference value 'a', the control fan 1003 is operated at low speed for a first predetermined time. (Previously, fan 1003 was in the off state).

[0079] Among them, the difference in smoke concentration The calculation formula is as follows:

[0080] As mentioned above Taking a value of 10 as an example, controller 1002 calculates the 11th smoke concentration value. With average smoke concentration The difference in smoke concentration between = ,like > Then, control the fan 1003 to run at low speed for a first predetermined time. .

[0081] like ≤ If the control fan 1003 is kept off, the smoke sensor 1001 continues to sample and detect the smoke concentration value inside the smoke machine 1000, and then the aforementioned steps S10~S30 are executed again.

[0082] It is understandable that when the first The smoke concentration value for each sampling period and When the difference in smoke concentration between the average smoke concentrations of each sampling period exceeds a predetermined difference, it indicates an increase in current smoke concentration and backflow of fumes into the range hood 1000, requiring the fan 1003 to be activated. Furthermore, under normal circumstances, the amount of backflow of fumes from the range hood 1000 each time is not significant, and the lower speed setting consumes less power and produces less noise compared to the higher speed setting. Therefore, in this embodiment, when the smoke concentration difference exceeds the predetermined difference, the controller 1002 can first control the fan 1003 to operate at a lower speed for a period of time to prevent further backflow of external fumes and to expel the backflowed fumes, effectively reducing noise and energy consumption.

[0083] Please see Figure 3 In some embodiments, after the fan 1003 is operated at the first speed for a first predetermined period of time, the backflow prevention control method further includes: Obtain the first current smoke concentration value detected by smoke sensor 1001; Determine whether the current smoke concentration value is greater than the predetermined smoke concentration value; When the current smoke concentration value is greater than the predetermined smoke concentration value, the control fan 1003 is operated at the second gear.

[0084] Specifically, in the previous embodiment, the fan 1003 operates at a low speed for a first predetermined period of time. Subsequently, the controller 1002 acquires the first current smoke concentration value detected by the smoke sensor 1001 in real time. .like > Then control the fan 1003 to run at high speed. If ≤ If so, then control fan 1003 to shut down.

[0085] It is understandable that if the current smoke concentration value remains high after the fan 1003 has been running at a low speed for a period of time, it indicates that the low-speed operation of the fan 1003 has failed to improve the backflow of oil fumes or the effect is not significant. Therefore, in this embodiment, when the first current smoke concentration value is greater than the predetermined smoke concentration value, the fan 1003 is controlled to switch to high-speed operation to prevent further backflow of external oil fumes and to ensure that the backflowed oil fumes are discharged.

[0086] Please see Figure 3 In some embodiments, after controlling the fan 1003 to operate at the second speed, the backflow prevention control method further includes: Obtain the second current smoke concentration value detected by smoke sensor 1001; Determine whether the current smoke concentration value is less than the predetermined smoke concentration value; When the second current smoke concentration value is less than the predetermined smoke concentration value, the control fan 1003 is operated at the second gear for the second predetermined time.

[0087] Specifically, after the fan 1003 is running at high speed in the previous embodiment, the controller 1002 acquires the second current smoke concentration value detected by the smoke sensor 1001 in real time. .like < Then, control the fan 1003 to run at high speed for the second predetermined time. Then, fan 1003 was shut down.

[0088] like ≥ If the fan 1003 continues to run at high speed, it will again execute the steps of acquiring the second current smoke concentration value detected by the smoke sensor 1001 and determining whether the second current smoke concentration value is less than the predetermined smoke concentration value.

[0089] It is understandable that if the current smoke concentration value decreases to a lower value after the fan 1003 is running at high speed, it indicates that the problem of oil fume backflow has been resolved or improved. In this embodiment, when the second current smoke concentration value is less than the predetermined smoke concentration value, the fan 1003 is still controlled to run at high speed for a period of time. That is to say, after blowing the backflowing oil fumes back into the flue, the fan 1003 continues to run for a period of time before being turned off, thus preventing the backflowing oil fumes from flowing back again.

[0090] Based on the above solutions, the backflow prevention control method of this application has at least the following advantages: (1) The oil fume backflow prevention system, which consists of a smoke sensor 1001, a controller 1002 and a fan 1003, is relatively simple to implement.

[0091] (2) The smoke concentration data detected by the smoke sensor 1001 is used as the judgment condition for whether there is backflow of oil fumes in the smoke machine 1000. Based on the smoke concentration data, the fan 1003 is controlled to adopt a time and speed combination operation mode, which effectively reduces noise and energy consumption.

[0092] (3) The abnormal values ​​(outliers) in the sampling process of the smoke sensor 1001 were corrected, making the subsequent control more accurate and greatly reducing the frequent start-up and shutdown of the fan 1003 caused by misjudgment.

[0093] (4) The two sampling values ​​before and after the current sampling time are used to fit two linear curves. When an abnormal value appears in the current sampling value, the two smoke concentration values ​​of the two linear curves before and after the current sampling time are calculated and then the average value is taken. This process not only ensures that it conforms to the overall trend of smoke concentration, but also effectively reduces the error and greatly reduces the possibility of misjudgment. In this way, the working state of the fan 1003 can be accurately controlled to achieve the effect of exhausting backflowing oil fumes.

[0094] (5) After blowing the backflowing fumes back into the flue, the fan 1003 continues to run for a period of time before being turned off to prevent the backflowing fumes from flowing back again.

[0095] Please see Figure 2 and Figure 5 The anti-backflow control device 100 of this application is applied to a smoke hood 1000. The smoke hood 1000 includes a smoke sensor 1001 and a fan 1003. The smoke sensor 1001 is used to sample and detect the smoke concentration value inside the smoke hood 1000. The anti-backflow control device 100 includes a first acquisition module 10, a second acquisition module 20, and a control module 30. The first acquisition module 10 is used to acquire the smoke concentration value of the smoke sensor 1001 in the first acquisition module 10, a second acquisition module 20, and a control module 30. The first sampling period obtained by detection The second acquisition module 20 is used to acquire the smoke concentration value of the smoke sensor 1001. Detected in each sampling period The control module 30 is used to determine the average smoke concentration corresponding to each smoke concentration value. The smoke concentration value and the average smoke concentration are used to control the operating status of the fan 1003. ≥1.

[0096] The anti-backflow control device 100 of this application embodiment, according to the first... Smoke concentration values ​​for each sampling period and The average smoke concentration corresponding to each sampling period can accurately control the working status of the fan 1003 to achieve the effect of expelling backflowing oil fumes.

[0097] In some embodiments, the second acquisition module 20 is specifically used to: acquire the smoke sensor 1001 at... Detected in each sampling period The smoke concentration value; based on the smoke sensor 1001 at the... The first sampling period obtained by detection The smoke concentration value, smoke sensor 1001 in the first The first sampling period obtained by detection The smoke concentration value, smoke sensor 1001 in the first The first sampling period obtained by detection The smoke concentration value, smoke sensor 1001 in the first The first sampling period obtained by detection The smoke concentration value, smoke sensor 1001 in the first The first sampling period obtained by detection The smoke concentration value was corrected. The smoke concentration value; in the correction of the... After each smoke concentration value, according to Each smoke concentration value determines the average smoke concentration, where, ≥3, 3≤ ≤ .

[0098] In the above technical solution, the smoke concentration value is corrected by combining the two sampling values ​​before and after the current sampling time, and then used to calculate the average smoke concentration. In this way, the abnormal values ​​in the sampling process of the smoke sensor 1001 are corrected, making subsequent control more accurate and greatly reducing the frequent start-up and shutdown of the fan 1003 caused by misjudgment.

[0099] In some embodiments, the second acquisition module 20 is specifically used to: based on the smoke sensor 1001 at the... The first sampling period obtained by detection The smoke concentration value, smoke sensor 1001 in the first The first sampling period obtained by detection The smoke concentration value, smoke sensor 1001 in the first The first sampling period obtained by detection The smoke concentration value is used to determine the first... The first smoke concentration correction value corresponding to each smoke concentration value; at least based on the smoke sensor 1001 in the first... The first sampling period obtained by detection The smoke concentration value, smoke sensor 1001 in the first The first sampling period obtained by detection The smoke concentration value is used to determine the first... The second smoke concentration correction value corresponding to each smoke concentration value; determine the smoke sensor 1001 in the... The first sampling period obtained by detection Whether the smoke concentration value falls within the range of the first smoke concentration correction value and the second smoke concentration correction value; when the first When a smoke concentration value does not fall within the range of the first smoke concentration correction value and the second smoke concentration correction value, a smoke concentration correction value is determined based on the first smoke concentration correction value and the second smoke concentration correction value; the smoke concentration correction is then applied to the smoke concentration correction value. Each smoke concentration value.

[0100] In the above technical solution, the first two and last two sampled values ​​at the current sampling time are used to fit two linear curves. When the current sampled value does not fall within the range of the calculated values ​​of the linear curves containing the first two and last two sampled values, the smoke concentration correction value is determined based on the calculated values ​​of the linear curves containing the first two and last two sampled values. This process not only ensures that it conforms to the overall trend of smoke concentration, but also effectively reduces errors and greatly reduces the possibility of misjudgment. In this way, the working state of the fan 1003 can be accurately controlled to achieve the effect of exhausting backflowing fumes.

[0101] In some implementations, the second acquisition module 20 is specifically used to: take the average of the first smoke concentration correction value and the second smoke concentration correction value as the smoke concentration correction value.

[0102] In the above technical solution, the average of the first smoke concentration correction value and the second smoke concentration correction value is taken as the smoke concentration correction value, which can better correct the smoke concentration, reduce data errors, and thus reduce the possibility of misjudgment.

[0103] In some embodiments, the operating positions of the fan 1003 include a first position and a second position. The operating power corresponding to the first position is lower than the operating power corresponding to the second position. The control module 30 is specifically used to: determine the first... Whether the difference between the smoke concentration value and the average smoke concentration is greater than the predetermined concentration difference; when the smoke concentration difference is greater than the predetermined concentration difference, control the fan 1003 to run at the first gear for a first predetermined time.

[0104] In the above technical solution, when the difference in smoke concentration is greater than the predetermined difference in concentration, the controller 1002 first controls the fan 1003 to run at a low speed for a period of time to prevent further backflow of external oil fumes and to discharge the backflowed oil fumes, which effectively reduces noise and lowers energy consumption.

[0105] In some embodiments, after controlling the fan 1003 to run at the first gear for a first predetermined time, the control module 30 is further configured to: acquire the first current smoke concentration value detected by the smoke sensor 1001; determine whether the first current smoke concentration value is greater than a predetermined smoke concentration value; and when the first current smoke concentration value is greater than the predetermined smoke concentration value, control the fan 1003 to run at the second gear.

[0106] In the above technical solution, when the first current smoke concentration value is greater than the predetermined smoke concentration value, the control fan 1003 is switched to high-speed operation to prevent further backflow of external oil fumes and to ensure that the backflowed oil fumes are discharged.

[0107] In some implementations, after controlling the fan 1003 to run at the second speed, the control module 30 is further configured to: acquire the second current smoke concentration value detected by the smoke sensor 1001; determine whether the second current smoke concentration value is less than a predetermined smoke concentration value; and when the second current smoke concentration value is less than the predetermined smoke concentration value, control the fan 1003 to run at the second speed for a second predetermined duration.

[0108] In the above technical solution, when the second current smoke concentration value is less than the predetermined smoke concentration value, the fan 1003 is still controlled to run at high speed for a period of time. That is to say, after blowing the backflowing fumes back into the flue, the fan 1003 continues to run for a period of time before being turned off, thus preventing the backflowing fumes from flowing back again.

[0109] It should be noted that the explanation of the backflow prevention control method in the foregoing embodiments also applies to the backflow prevention control device 100 in the embodiments of this application, and will not be elaborated here.

[0110] Please see Figure 6 The backflow prevention control system 200 of this application includes one or more processors 210 and a memory 220, wherein the memory 220 stores a computer program. When the computer program is executed by the processor 210, the backflow prevention control method of any of the above embodiments is implemented.

[0111] For example, when the computer program is executed by the processor 210, the following backflow prevention control method is implemented: S10: Acquire the smoke sensor 1001 at the... The first sampling period obtained by detection Individual smoke concentration values; S20: Obtain information from smoke sensor 1001. Detected in each sampling period The average smoke concentration corresponding to each smoke concentration value; S30: According to the... The smoke concentration value and the average smoke concentration are used to control the operating status of the fan 1003. ≥1.

[0112] It should be noted that the explanation of the backflow prevention control method in the foregoing embodiments also applies to the backflow prevention control system 200 of the embodiments of this application, and will not be elaborated here.

[0113] Please see Figure 7 The computer-readable storage medium 300 of this application embodiment stores a computer program 310 thereon. When the program is executed by the processor 320, it implements the anti-backflow control method of any of the above embodiments.

[0114] For example, when the program is executed by processor 320, the following backflow prevention control method is implemented: S10: Acquire the smoke sensor 1001 at the... The first sampling period obtained by detection Individual smoke concentration values; S20: Obtain information from smoke sensor 1001. Detected in each sampling period The average smoke concentration corresponding to each smoke concentration value; S30: According to the... The smoke concentration value and the average smoke concentration are used to control the operating status of the fan 1003. ≥1.

[0115] It should be noted that the explanation of the backflow prevention control method in the foregoing embodiments also applies to the computer-readable storage medium 300 in the embodiments of this application, and will not be elaborated here.

[0116] In summary, the backflow prevention control method, backflow prevention control device 100, backflow prevention control system 200, and computer-readable storage medium 300 of the embodiments of this application, according to the first... Smoke concentration values ​​for each sampling period and The average smoke concentration corresponding to each sampling period can accurately control the working status of the fan 1003 to achieve the effect of expelling backflowing oil fumes.

[0117] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0118] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0119] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable storage medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, a computer-readable storage medium can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable storage medium could be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0120] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0121] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it includes one or a combination of the steps of the method embodiments. Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc.

[0122] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for preventing backflow control, characterized in that, Applied to a range hood, the range hood includes a smoke sensor and a fan. The smoke sensor is used to sample and detect the smoke concentration value inside the range hood. The backflow prevention control method includes: The smoke sensor was obtained at the first The first sampling period obtained by detection The smoke concentration value mentioned above; The smoke sensor was acquired at Detected in each sampling period The average smoke concentration corresponding to each of the aforementioned smoke concentration values; According to the first The operating state of the fan is controlled by the given smoke concentration value and the average smoke concentration. ≥1.

2. The backflow prevention control method according to claim 1, characterized in that, The smoke sensor is obtained in Detected in each sampling period The average smoke concentration corresponding to each of the smoke concentration values ​​includes: The smoke sensor was acquired at Detected in each sampling period The smoke concentration value mentioned above; Based on the smoke sensor in the first The first sampling period obtained by detection The smoke concentration value, the smoke sensor in the first... The first sampling period obtained by detection The smoke concentration value, the smoke sensor in the first... The first sampling period obtained by detection The smoke concentration value, the smoke sensor in the first... The first sampling period obtained by detection The smoke concentration value, the smoke sensor in the first... The first sampling period obtained by detection The smoke concentration value is corrected for the first... The smoke concentration value mentioned above; In correcting the above... After obtaining the smoke concentration value, according to the... The average smoke concentration is determined by the sum of the smoke concentration values, wherein... ≥3, 3≤ ≤ .

3. The backflow prevention control method according to claim 2, characterized in that, The smoke sensor based on the first The first sampling period obtained by detection The smoke concentration value, the smoke sensor in the first... The first sampling period obtained by detection The smoke concentration value, the smoke sensor in the first... The first sampling period obtained by detection The smoke concentration value, the smoke sensor in the first... The first sampling period obtained by detection The smoke concentration value, the smoke sensor in the first... The first sampling period obtained by detection The smoke concentration value is corrected for the first... The smoke concentration values ​​include: Based on the smoke sensor in the first The first sampling period obtained by detection The smoke concentration value, the smoke sensor in the first... The first sampling period obtained by detection The smoke concentration value, the smoke sensor in the first... The first sampling period obtained by detection The smoke concentration value is used to determine the first... The first smoke concentration correction value corresponding to each of the smoke concentration values; At least based on the smoke sensor in the first The first sampling period obtained by detection The smoke concentration value, the smoke sensor in the first... The first sampling period obtained by detection The smoke concentration value is used to determine the first... The second smoke concentration correction value corresponding to each of the smoke concentration values; Determine the smoke sensor at the first The first sampling period obtained by detection Whether the smoke concentration value falls within the range of the first smoke concentration correction value and the second smoke concentration correction value. When the first When the smoke concentration value does not fall within the range of the first smoke concentration correction value and the second smoke concentration correction value, the smoke concentration correction value is determined based on the first smoke concentration correction value and the second smoke concentration correction value. The correction is based on the smoke concentration correction value. The smoke concentration value mentioned above.

4. The backflow prevention control method according to claim 3, characterized in that, Determining the smoke concentration correction value based on the first smoke concentration correction value and the second smoke concentration correction value includes: The average of the first smoke concentration correction value and the second smoke concentration correction value is taken as the smoke concentration correction value.

5. The backflow prevention control method according to any one of claims 1-4, characterized in that, The fan's operating speed includes a first speed and a second speed. The operating power corresponding to the first speed is lower than the operating power corresponding to the second speed. The first speed is based on the... The operation of the fan is controlled by the smoke concentration value and the average smoke concentration, including: Determine the first Whether the difference in smoke concentration between the individual smoke concentration values ​​and the average smoke concentration is greater than a predetermined concentration difference; When the difference in smoke concentration is greater than the predetermined difference in concentration, the fan is controlled to run at the first gear for a first predetermined time.

6. The backflow prevention control method according to claim 5, characterized in that, After controlling the fan to operate at the first speed for a first predetermined time, the backflow prevention control method further includes: Obtain the first current smoke concentration value detected by the smoke sensor; Determine whether the first current smoke concentration value is greater than the predetermined smoke concentration value; When the first current smoke concentration value is greater than the predetermined smoke concentration value, the fan is controlled to operate at the second speed.

7. The backflow prevention control method according to claim 6, characterized in that, After controlling the fan to operate at the second speed, the backflow prevention control method further includes: Obtain the second current smoke concentration value detected by the smoke sensor; Determine whether the second current smoke concentration value is less than the predetermined smoke concentration value; When the second current smoke concentration value is less than the predetermined smoke concentration value, the fan is controlled to run at the second gear for a second predetermined time.

8. A backflow prevention control device, characterized in that, Applied to a range hood, the range hood includes a smoke sensor and a fan. The smoke sensor is used to sample and detect the smoke concentration value inside the range hood. The anti-backflow control device includes: The first acquisition module is used to acquire the smoke sensor at the time... The first sampling period obtained by detection The smoke concentration value mentioned above; The second acquisition module is used to acquire the smoke sensor's... Detected in each sampling period The average smoke concentration corresponding to each of the aforementioned smoke concentration values; Control module, used to, according to the first The operating state of the fan is controlled by the given smoke concentration value and the average smoke concentration. ≥1.

9. A backflow prevention control system, characterized in that, The backflow prevention control system includes one or more processors and a memory, the memory storing a computer program, which, when executed by the processor, implements the backflow prevention control method according to any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the anti-backflow control method according to any one of claims 1-7.

Images