Control method of range hood and range hood

Abstract

The invention relates to a control method of an extractor hood and the extractor hood, and relates to the technical field of household appliances. The method comprises the steps that in the cooking state, the current smoke concentration detected by a smoke sensor of the extractor hood in real time is obtained, and the current draught fan response current is adjusted according to the current draught fan rotating speed of the extractor hood, the current draught fan response current, the pre-stored corresponding relation between the draught fan response current and the draught fan standard rotating speed and the current smoke concentration. And in the non-cooking state, a fan of the extractor hood is controlled to operate periodically according to the preset smoke detection interval duration. The current smoke concentration detected by the smoke sensor in real time is obtained, and the ventilation function is automatically started according to the fact that the current smoke concentration is larger than a preset smoke concentration threshold value till the current smoke concentration is reduced to be below a preset second smoke concentration threshold value. And the smoke detection interval duration is adaptively adjusted according to the ventilation timing duration. By adopting the range hood, automatic gear adjustment and automatic smoke detection of the range hood can be realized.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a control method for a range hood and a range hood. Background Art

[0002] At present, users have higher and higher requirements for the air quality of the cooking environment. The range hood manufacturers on the market use different smoke detection methods to detect the smoke concentration in the kitchen and automatically adjust the hood gear according to the smoke concentration, thereby improving the air quality in the kitchen. Some range hood manufacturers add smoke sensors, such as PM2.5 sensors, to the range hood casing to detect the smoke concentration in the kitchen through air diffusion movement. Some range hood manufacturers also use fan-type smoke sensor components to detect smoke concentration.

[0003] However, the detection efficiency of adding a smoke sensor to the range hood housing depends on the air diffusion speed, which is usually slow in a kitchen environment and easily affected by other electrical appliances (such as air conditioners and fans), resulting in unstable detection results and values. Although the fan-type smoke sensor assembly can achieve a more stable smoke concentration detection effect, the sensor itself is expensive, which increases the overall cost of the range hood.

[0004] Therefore, there is an urgent need for a control method for a range hood and a range hood. Summary of the invention

[0005] Based on this, it is necessary to provide a control method for a range hood and a range hood to address the above technical issues.

[0006] In a first aspect, a control method for a range hood is provided, the method comprising:

[0007] In the cooking state, obtain the current smoke concentration detected by the smoke sensor of the range hood in real time;

[0008] Dynamically adjusting the current fan response current of the range hood according to the pre-stored correspondence between the smoke concentration range and the fan response current;

[0009] When the current fan response current reaches a stable state, adjusting the current fan response current according to the current fan speed of the range hood, the current fan response current, the pre-stored correspondence between the fan response current and the fan standard speed, the preset fan response current adjustment rule and the current smoke concentration;

[0010] In a non-cooking state, the fan of the range hood is controlled to operate periodically according to a preset smoke detection interval;

[0011] During the operation of the fan of the range hood, the current smoke concentration detected by the smoke sensor in real time is obtained, and if the current smoke concentration is greater than a preset first smoke concentration threshold, the ventilation function of the range hood is turned on until the current smoke concentration drops below a preset second smoke concentration threshold;

[0012] Turn off the ventilation function and obtain the current ventilation timing duration, query the target smoke detection interval duration corresponding to the current ventilation timing duration in the pre-stored correspondence between the ventilation timing duration and the smoke detection interval duration, and update the target smoke detection interval duration to the preset smoke detection interval duration.

[0013] As an optional implementation manner, dynamically adjusting the current fan response current of the range hood according to the pre-stored correspondence between the smoke concentration range and the fan response current includes:

[0014] In the pre-stored correspondence between the smoke concentration range and the fan response current, query in real time the target fan response current corresponding to the current smoke concentration range in which the current smoke concentration is located;

[0015] The current fan response current of the range hood is adjusted in real time according to the target fan response current.

[0016] As an optional implementation, the method further includes:

[0017] When the duration during which the current fan response current remains unchanged is greater than the preset smoke stabilization duration, it is determined that the current fan response current reaches a stable state.

[0018] As an optional implementation manner, adjusting the current fan response current according to the current fan speed of the range hood, the current fan response current, the pre-stored correspondence between the fan response current and the fan standard speed, the preset fan response current adjustment rule and the current smoke concentration includes:

[0019] Acquire a current fan speed when the current fan response current reaches a stable state as a first fan speed;

[0020] In the correspondence between the fan response current and the fan standard speed, query the target fan standard speed corresponding to the current fan response current;

[0021] If the first fan speed is greater than the target fan standard speed, the preset maximum fan response current is used as the current fan response current;

[0022] The current fan response current is adjusted according to the current fan speed of the range hood, the preset maximum fan speed and the preset current adjustment coefficient, and then the step of obtaining the current smoke concentration detected in real time by the smoke sensor of the range hood in the cooking state is performed;

[0023] If the first fan speed is less than or equal to the target fan standard speed, the current fan response current is adjusted according to the current smoke concentration detected in real time and a preset fan response current adjustment rule.

[0024] As an optional implementation manner, adjusting the current fan response current according to the current fan speed of the range hood, a preset maximum fan speed and a preset current adjustment coefficient includes:

[0025] Obtaining the current fan speed at the maximum fan response current after a preset fan stabilization time as the second fan speed;

[0026] If the second fan speed is greater than the maximum fan speed, maintaining the current fan response current;

[0027] If the second fan speed is less than or equal to the preset maximum fan speed, the product of the preset current adjustment coefficient and the current fan response current is updated to the current fan response current.

[0028] As an optional implementation, the preset current regulation coefficient is 0.5.

[0029] As an optional implementation manner, adjusting the current fan response current according to the current smoke concentration detected in real time and a preset fan response current adjustment rule includes:

[0030] If the current smoke concentration detected in real time decreases, a preset number of current gears are reduced based on the current fan response current, and then the step of adjusting the current fan response current according to the current fan speed of the range hood, the current fan response current, the pre-stored correspondence between the fan response current and the fan standard speed, the preset fan response current adjustment rule and the current smoke concentration is performed when the current fan response current reaches a stable state;

[0031] If the current smoke concentration remains unchanged or increases, the step of acquiring the current smoke concentration detected in real time by the smoke sensor of the range hood in the cooking state is performed.

[0032] As an optional implementation, the method further includes:

[0033] When the fan of the range hood is controlled to operate periodically according to a preset smoke detection interval, a preset minimum fan speed is determined as the fan speed of the range hood.

[0034] As an optional implementation manner, during the operation of the fan, after obtaining the current smoke concentration detected in real time by the smoke sensor, the method further includes:

[0035] If the current smoke concentration is less than or equal to the first smoke concentration threshold, and the timing duration is greater than the preset single-round detection duration, turning off the fan of the range hood;

[0036] The smoke detection interval duration is extended and stored according to a preset detection interval coefficient.

[0037] In a second aspect, a range hood is provided, comprising a smoke sensor, a fan and a main control device, to implement the range hood control method as described in any one of the first aspect.

[0038] The present application provides a control method for a range hood and a range hood. The technical solution provided by the embodiments of the present application brings at least the following beneficial effects: in a cooking state, obtaining the current smoke concentration detected in real time by the smoke sensor of the range hood; dynamically adjusting the current fan response current of the range hood according to the pre-stored correspondence between the smoke concentration range and the fan response current; when the current fan response current reaches a stable state, adjusting the current fan response current according to the current fan speed of the range hood, the current fan response current, the pre-stored correspondence between the fan response current and the fan standard speed, the preset fan response current adjustment rule and the current smoke concentration; in a non-cooking state Under the present invention, the fan of the range hood is controlled to operate periodically according to the preset smoke detection interval duration; during the operation of the fan of the range hood, the current smoke concentration detected by the smoke sensor in real time is obtained, and if the current smoke concentration is greater than the preset first smoke concentration threshold, the ventilation function of the range hood is turned on until the current smoke concentration drops below the preset second smoke concentration threshold; the ventilation function is turned off, and the current ventilation timing duration is obtained, and the target smoke detection interval duration corresponding to the current ventilation timing duration is queried in the pre-stored correspondence between the ventilation timing duration and the smoke detection interval duration, and the target smoke detection interval duration is updated to the preset smoke detection interval duration. The present application monitors the smoke concentration in real time, and dynamically adjusts the fan response current in combination with the pre-stored correspondence between the smoke concentration range and the fan response current, so that the range hood can intelligently match the fan power according to the change in smoke concentration, thereby reducing unnecessary energy consumption and improving energy efficiency. After the fan reaches a stable state, it is further corrected by combining the fan speed, the relationship between the response current and the standard speed, and the adjustment rules to achieve more accurate fan control, ensure the stable operation of the range hood, and improve the user experience. In the non-cooking state, by setting the smoke detection interval and periodically running the fan, low-frequency smoke concentration monitoring is achieved, which ensures the indoor air quality while avoiding the energy waste caused by frequent operation. When the smoke concentration exceeds the threshold, the ventilation function is automatically turned on, and the operation state is adjusted in real time according to the concentration change until the smoke concentration is reduced to a safe range, reducing manual intervention. By recording the ventilation timing time and adjusting the smoke detection interval based on the corresponding relationship, the logical relationship between fan ventilation and detection is optimized, avoiding resource waste caused by frequent detection, while maintaining the long-term stability of indoor air quality. By intelligently adjusting the fan operation state and smoke detection frequency, the frequent start and stop and overload operation of the equipment are reduced, the service life of the equipment is extended, the user's maintenance cost is reduced, and a smarter and more efficient cooking environment is provided for users.

[0039] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1a A schematic diagram of the structure of a range hood provided in an embodiment of the present application;

[0042] Figure 1b A smoke flow diagram provided in an embodiment of the present application;

[0043] Figure 2 A flow chart of a range hood control method provided in an embodiment of the present application;

[0044] Figure 3 A flow chart of a method for dynamically adjusting a fan response current provided in an embodiment of the present application;

[0045] Figure 4 A flow chart of a method for adjusting the current response current of a wind turbine provided in an embodiment of the present application;

[0046] Figure 5 A flow chart of another method for adjusting the current response current of a wind turbine provided in an embodiment of the present application;

[0047] Figure 6 A flowchart of another method for adjusting the current response current of a wind turbine provided in an embodiment of the present application;

[0048] Figure 7 A flowchart of an example of a method for controlling a range hood in a cooking state provided by an embodiment of the present application;

[0049] Figure 8 A flowchart of an example of a method for controlling a range hood in a non-cooking state provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0051] The control method of the range hood provided in the embodiment of the present application can be applied to the range hood. Figure 1aAs shown, the range hood includes a smoke sensor 110, a fan 120 and a main control device 130. The main control device 130 may be an MCU program processor disposed inside the range hood, the smoke sensor 110 may be an infrared PM2.5 sensor disposed in the cavity of the range hood, a through hole 150 may be disposed on the housing 140, and the smoke sensor 110 may interact with the ambient air through the through hole 150 under the action of the fan 120. In addition, the range hood may also include a smoke collecting plate 160, which is opened and closed under the control of the main control device 130, and in the closed state, the air intake port 170 does not contact the ambient air. Figure 1b A smoke flow diagram provided in an embodiment of the present application, Figure 1b The solid arrow in the middle indicates the smoke flow that can be detected by the smoke sensor 110, and the dotted arrow indicates the smoke flow that enters the range hood cavity from the air intake port 170 and is then discharged to the common flue 180 through the smoke pipe. When the user is cooking, the main control device 130 controls the smoke collecting plate 160 to open a preset angle (such as 45°), and the fan 120 is running. A part of the smoke generated by cooking is intercepted by the smoke collecting plate 160, and the air intake port 170 opened by the smoke collecting plate 160 discharges the smoke into the room, while the other part can be detected by the smoke sensor 110. When the user is not cooking, the smoke collecting plate 160 is closed, and the fan 120 can be turned on periodically. When the fan 120 is turned on, the smoke sensor 110 can detect the smoke concentration in the environment surrounding the range hood.

[0052] The following will describe in detail a control method for a range hood provided by an embodiment of the present application in conjunction with a specific implementation manner. Figure 2 A flow chart of a control method for a range hood provided in an embodiment of the present application, such as Figure 2 As shown, the specific steps are as follows:

[0053] Step 201, in a cooking state, obtaining the current smoke concentration detected in real time by the smoke sensor of the range hood.

[0054] During implementation, when the range hood receives a command from the user to turn on the range hood, the main control device of the range hood can obtain the current smoke concentration detected by the smoke sensor in real time. For example, when the user turns on the range hood, the range hood detects the PM2.5 value of the environment in real time through the infrared PM2.5 sensor.

[0055] Step 202: dynamically adjust the current fan response current of the range hood according to the pre-stored correspondence between the smoke concentration range and the fan response current.

[0056] During implementation, technicians can measure the correspondence between the range hood's fan response current and the smoke concentration range through experiments, and then store it in the range hood, and dynamically adjust the range hood's current fan response current according to the smoke concentration range corresponding to the detected smoke concentration.

[0057] As an optional implementation, Figure 3 A flow chart of a method for dynamically adjusting a fan response current provided in an embodiment of the present application, such as Figure 3 As shown, in step 202, the specific steps of dynamically adjusting the current fan response current of the range hood according to the pre-stored correspondence between the smoke concentration range and the fan response current are as follows:

[0058] Step 301 : in real time, query the target fan response current corresponding to the current smoke concentration range in which the current smoke concentration is located in the pre-stored correspondence relationship between the smoke concentration range and the fan response current.

[0059] In the implementation, taking PM2.5 as an example, Table 1 is a table showing the correspondence between PM2.5 value and fan response current, as shown in Table 1:

[0060] Table 1

[0061]

[0062]

[0063] The range hood can query the corresponding target fan response current in the correspondence between the smoke concentration range and the fan response current pre-stored in the main control device according to the real-time detected smoke concentration (PM2.5 value).

[0064] Step 302: adjusting the current fan response current of the range hood in real time according to the target fan response current.

[0065] During implementation, the range hood can give the target fan response current queried in real time to the fan. The higher the smoke concentration, the greater the target fan response current, to ensure that a larger current is given to the fan when a higher smoke concentration is detected, thereby achieving better smoke absorption.

[0066] Step 203, when the current fan response current reaches a stable state, adjust the current fan response current according to the current fan speed of the range hood, the current fan response current, the pre-stored correspondence between the fan response current and the fan standard speed, the preset fan response current adjustment rules and the current smoke concentration.

[0067] In the implementation, the current fan response current and fan speed detected in real time are compared with the corresponding relationship of the pre-stored data to analyze whether the current operating state deviates from the standard working curve. Combined with the mapping relationship between smoke concentration, response current and fan speed, the fan response current is dynamically adjusted according to the preset fan response current adjustment rules, so as to achieve refined control of the fan operation state. For example: the current fan speed of the range hood is 1500 rpm, the current fan response current is 2.5A, and the current smoke concentration is detected to be 85ug / M 3 . By looking up the pre-stored table of correspondence between fan response current and standard speed, it is found that the smoke concentration is 85ug / M 3 The target fan response current should be 2.8A. The range hood can calculate the required adjustment amount based on the preset fan response current adjustment rule. The adjustment rule is set to increase or decrease the fan speed by 200 rpm for every 0.1A difference. It is calculated that the fan response current needs to be increased to 2.8A, and the fan speed needs to be increased to 1700 rpm. The range hood outputs an adjustment command to gradually increase the fan response current to 2.8A and adjust the speed to 1700 rpm until a stable state is reached. After the adjustment is completed, the fan response current and speed are continuously monitored to ensure that they are consistent with the preset relationship. If deviations are found, repeat the above steps until the operating parameters are stable.

[0068] As an optional implementation, when the duration during which the current fan response current remains unchanged is greater than a preset smoke stabilization duration, it is determined that the current fan response current reaches a stable state.

[0069] During implementation, when the range hood detects a certain smoke concentration, the corresponding fan response current In is queried. At this time, the range hood can start timing. If the fan response current changes, the timing is reset and restarted. If the fan response current does not change when the preset smoke stabilization time is reached, it can be determined that the current fan response current has reached a stable state.

[0070] As an optional implementation, Figure 4 A flow chart of a method for adjusting the current response current of a wind turbine provided in an embodiment of the present application is as follows: Figure 4 As shown, in step 203, according to the current fan speed of the range hood, the current fan response current, the pre-stored correspondence between the fan response current and the fan standard speed, the preset fan response current adjustment rule and the current smoke concentration, the specific steps of adjusting the current fan response current are as follows:

[0071] Step 401, obtaining the current fan speed when the current fan response current reaches a stable state as the first fan speed.

[0072] In implementation, by detecting the current fan response current in a stable state and combining it with the actual operating characteristics of the fan, the current fan speed is measured and recorded, and used as the first fan speed. For example: in a certain operation, when the current fan response current reaches a stable state, the detection system records the current fan speed as 1800 rpm, and sets the speed as the first fan speed.

[0073] Step 402 : In the correspondence between the fan response current and the fan standard speed, query the target fan standard speed corresponding to the current fan response current.

[0074] In practice, by querying the correspondence between the pre-stored fan response current and the fan standard speed, the range hood can query the target fan standard speed according to the current fan response current to evaluate the deviation of the fan operation. The deviation of the fan speed is related to the pressure change of the public flue. Specifically, the range hood gives the fan a constant fan response current I x When the public flue pressure changes, the current fan speed will change. The greater the pressure, the greater the current fan speed. Therefore, technicians can adjust the fan speed according to the fan response current I x Under constant conditions, the corresponding relationship between the current fan speed and the public flue pressure is measured and calculated. Table 2 shows the corresponding relationship between the fan response current and the fan standard speed provided in the embodiment of the present application, which can be used to determine whether there is pressure in the public flue. As shown in Table 2:

[0075] Table 2

[0076] <![CDATA[Fan response current (I x )]]> <![CDATA[Standard speed of the fan (S x1 )]]> <![CDATA[I 1 ]]> <![CDATA[S 11 ]]> <![CDATA[I 2 ]]> <![CDATA[S 21 ]]> <![CDATA[I 3 ]]> <![CDATA[S 31 ]]> <![CDATA[I 4 ]]> <![CDATA[S 41 ]]> … … <![CDATA[I n ]]> <![CDATA[S n1 ]]>

[0077] According to Table 2, it can be inferred that if the fan response current I is given x If the current fan speed exceeds the fan standard speed S x1 , it means that the public pipeline pressure has reached the threshold, that is, the current fan speed exceeds the public pipeline pressure.

[0078] Step 403: If the first fan speed is greater than the target fan standard speed, the preset maximum fan response current is used as the current fan response current.

[0079] In implementation, by comparing the first fan speed with the target fan standard speed, it is determined whether there is public duct pressure. If the first fan speed is greater than the target fan standard speed, it means that there is public flue pressure and exceeds the threshold. At this time, the range hood sets the maximum fan response current of the fan as the current fan response current, that is, triggers the high current mode, so that the range hood can break through the public duct pressure and exhaust smoke smoothly.

[0080] Step 404 , adjusting the current fan response current according to the current fan speed of the range hood, the preset maximum fan speed and the preset current adjustment coefficient, and then executing step 201 .

[0081] In implementation, after adjusting to the maximum fan response current, the current fan response current is further optimized according to the difference between the current fan speed and the preset maximum fan speed and the current adjustment coefficient. After the adjustment is completed, return to step 201 and restart the dynamic adjustment process to ensure the stability and adaptability of the fan operation.

[0082] As an optional implementation, Figure 5 A flowchart of another method for adjusting the current wind turbine response current provided in an embodiment of the present application, such as Figure 5 As shown, the specific steps of adjusting the current fan response current according to the current fan speed of the range hood, the preset maximum fan speed and the preset current adjustment coefficient in step 404 are as follows:

[0083] Step 501, obtaining the current fan speed at the maximum fan response current after a preset fan stabilization time as the second fan speed.

[0084] In implementation, under the maximum fan response current, the range hood can start timing, and after a preset fan stabilization time has passed, the current fan speed is collected as the second fan speed.

[0085] Step 502: If the second fan speed is greater than the maximum fan speed, the current fan response current is maintained.

[0086] In implementation, if the second fan speed is greater than the maximum fan speed, the current fan response current is maintained, waiting for the fan speed to automatically decrease or the user to manually decrease the speed.

[0087] Step 503: if the second fan speed is less than or equal to the preset maximum fan speed, the product of the preset current adjustment coefficient and the current fan response current is updated to the current fan response current.

[0088] In implementation, the preset maximum fan speed is the fan speed under the maximum fan response current measured when the common pipeline pressure is less than the common pipeline pressure threshold. If the second fan speed is less than or equal to the preset maximum fan speed, it means that the common pipeline pressure is less than the common pipeline pressure threshold at this time, and the high current mode can be exited at this time.

[0089] As an optional implementation, the preset current regulation coefficient is 0.5.

[0090] In practice, using 0.5 as the current adjustment coefficient may not disrupt the smoking balance.

[0091] Step 405: if the first fan speed is less than or equal to the target fan standard speed, the current fan response current is adjusted according to the current smoke concentration detected in real time and the preset fan response current adjustment rule.

[0092] In implementation, if the first fan speed is less than or equal to the target fan standard speed, the range hood can adjust the current fan response current to match the current smoke concentration based on the real-time detected current smoke concentration and the fan response current adjustment rules, thereby achieving a balance between energy saving and efficient operation.

[0093] As an optional implementation, Figure 6 A flowchart of another method for adjusting the current wind turbine response current provided in an embodiment of the present application is as follows: Figure 6 As shown, in step 405, the specific steps of adjusting the current fan response current according to the current smoke concentration detected in real time and the preset fan response current adjustment rule are as follows:

[0094] Step 601 : if the current smoke concentration detected in real time decreases, the current level is reduced by a preset number of current levels based on the current fan response current, and then step 203 is executed.

[0095] In practice, when the current smoke concentration is detected to be reduced in real time, it means that the oil smoke in the kitchen environment is reduced and the load demand of the range hood is reduced. In order to save energy and optimize the operating efficiency, the range hood can reduce the current gear by a preset number (such as reducing the step size of the current value) based on the current fan response current to reduce the energy consumption of the fan. Subsequently, the operating state of the fan is dynamically adjusted by executing step 203 to ensure the operating stability and adaptability of the range hood. For example: Real-time detection of the current smoke concentration from 85ug / M 3 Down to 60ug / M 3 , indicating that the amount of ambient oil smoke is reduced. The current fan response current is 3.0A, the system sets each gear to 0.2A, and the preset reduction is 2 gears, and step 203 is executed.

[0096] Step 602: If the current smoke density remains unchanged or increases, execute step 201.

[0097] In practice, if the current smoke concentration is detected to remain unchanged or increase in real time, it means that the oil smoke concentration has not decreased or has shown an increasing trend. At this time, the range hood needs to continue to maintain or strengthen its operating capacity to cope with the oil smoke load. Therefore, step 201 is directly executed to dynamically adjust the fan response current and speed to ensure the efficient operation of the range hood. For example: the current smoke concentration detected is maintained at 85ug / M 3, and there is no downward trend, the range hood executes step 201. Step 201 dynamically optimizes the response current and speed configuration of the fan according to the change of real-time smoke concentration, so that the fan continues to maintain an efficient operation state, removes smoke in time, and ensures a clean kitchen environment.

[0098] Step 204: In a non-cooking state, the fan of the range hood is controlled to operate periodically according to a preset smoke detection interval.

[0099] In practice, when the user is not cooking, the range hood is in standby mode, i.e., the non-cooking mode of the embodiment of the present application. The technician can pre-store the smoke detection interval in the range hood, and the smoke detection interval can be used as an initial value for subsequent adaptive adjustment. The range hood controls the fan to run at each smoke detection interval. For example: the smoke detection interval t off = detection interval coefficient N × unit time t, the technician can set the initial value N = 1, t is 1 hour. Then the initial detection interval is 1 hour.

[0100] As an optional implementation, the range hood can also control the fan to turn on according to the time input by the user.

[0101] As an optional implementation, the range hood may control the fan of the range hood to operate periodically according to a preset smoke detection interval, and determine a preset minimum fan speed as the fan speed of the range hood.

[0102] In implementation, the range hood can control the periodic operation of the range hood fan according to the preset smoke detection interval to ensure that the smoke sensor can interact with the ambient gas. To ensure the lowest energy consumption, the fan can be operated at the minimum fan speed of the range hood.

[0103] Step 205, during the operation of the range hood fan, obtain the current smoke concentration detected in real time by the smoke sensor. If the current smoke concentration is greater than a preset first smoke concentration threshold, turn on the ventilation function of the range hood until the current smoke concentration drops below a preset second smoke concentration threshold.

[0104] In implementation, when the fan of the range hood is running, the current smoke concentration detected by the smoke sensor is monitored in real time. If the current concentration exceeds the preset first smoke concentration threshold, the range hood can determine that the smoke concentration in the kitchen is high and requires additional air circulation treatment to improve the environmental quality. At this time, the ventilation function of the range hood is automatically turned on, such as opening the smoke collecting plate, increasing the fan speed, and continuously monitoring the changes in smoke concentration. When the concentration drops below the preset second smoke concentration threshold, the ventilation function automatically stops to ensure the rational use of energy and compliance with indoor air quality standards. For example: the current smoke concentration is monitored to be 120ug / M in real time 3 , exceeds the preset first smoke concentration threshold of 100ug / M 3 , the range hood can start the ventilation function. The smoke concentration is continuously monitored during the ventilation process. When the concentration drops to 90ug / M 3 (lower than the second smoke concentration threshold 95ug / M 3 ), the range hood stops the ventilation function.

[0105] As an optional implementation, in step 205, after obtaining the current smoke concentration detected in real time by the smoke sensor during the operation of the fan, the following steps are also included:

[0106] If the current smoke concentration is less than or equal to the first smoke concentration threshold, and the timing duration is greater than the preset single-round detection duration, the fan of the range hood is turned off; and the smoke detection interval duration is extended and stored according to the preset detection interval coefficient.

[0107] In implementation, if the current smoke concentration is less than or equal to the first smoke concentration threshold, and the timing duration is greater than the preset single-round detection duration, it means that after the single-round detection duration, the ambient air is good. In order to reduce energy consumption, the range hood can turn off the fan. Then, the range hood can extend and store the smoke detection interval duration according to the preset detection interval coefficient. For example: the current smoke detection interval duration t off is 1 hour, and the detection interval coefficient is 2, then the updated smoke detection interval is 2 hours, which means that if the kitchen air detection result is good, the smoke detection interval is extended. off = detection interval coefficient N × unit time t, currently N = 2, t is 1 hour. The current smoke detection interval is 2 hours. Since the kitchen air detection result is good, N can be set to 3, and the updated smoke detection interval is 3 hours, that is, after the current round of detection, the next round of smoke detection will begin after 3 hours.

[0108] Step 206, turn off the ventilation function, obtain the current ventilation timing duration, query the target smoke detection interval duration corresponding to the current ventilation timing duration in the pre-stored correspondence between the ventilation timing duration and the smoke detection interval duration, and update the target smoke detection interval duration to the preset smoke detection interval duration.

[0109] In practice, after turning off the ventilation function, the range hood can record the current ventilation timing duration, and compare it with the pre-stored correspondence between the ventilation timing duration and the smoke detection interval duration, to determine the target smoke detection interval duration corresponding to the current ventilation timing duration. The range hood can update the target interval duration to the preset smoke detection interval duration to optimize the frequency and energy efficiency of the next round of detection. Table 3 is the correspondence between the ventilation timing duration and the smoke detection interval duration provided in the embodiment of the present application, as shown in Table 3:

[0110] Table 3

[0111]

[0112]

[0113] The range hood can query the target detection interval coefficient according to the duration range of the current ventilation timing duration, and further determine the target smoke detection interval duration.

[0114] As an optional implementation, Figure 7 This is a flowchart of an example of a method for controlling a range hood in a cooking state provided by an embodiment of the present application, such as Figure 7 As shown, the specific steps are as follows:

[0115] Step 701, when the user is cooking, the fan is controlled to turn on and the smoke collecting plate is opened.

[0116] Step 702, reading the current smoke concentration detected in real time by the smoke sensor, and giving the current fan response current of the motor according to the corresponding relationship between the smoke concentration range and the fan response current.

[0117] Step 703: when the duration during which the current fan response current remains unchanged is greater than the preset smoke stabilization duration, it is determined that the current fan response current reaches a stable state.

[0118] Step 704, obtaining the current fan speed S when the fan response current reaches a stable state 0 , in the corresponding relationship between the fan response current and the fan standard speed, query the current fan response current I x Corresponding target fan standard speed S x .

[0119] Step 705: determine the current fan speed S0 Is it less than the target fan standard speed S? x If yes, execute step 706, if no, execute step 708.

[0120] Step 706, determining whether the current smoke density detected in real time is reduced, if yes, executing step 707, if no, executing step 702.

[0121] Step 707 , based on the current response current of the fan, reduce the current level by a preset number, and then execute step 703 .

[0122] Step 708: taking the preset maximum fan response current as the current fan response current, and obtaining the current fan speed S after the preset fan stabilization time. 0 .

[0123] Step 709, determine the current fan speed S 0 Is it less than the maximum fan speed S? max If yes, execute step 710, if not, maintain the current fan response current.

[0124] Step 710 , updating the product of the preset current adjustment coefficient and the current fan response current to the current fan response current, and then executing step 702 .

[0125] As an optional implementation, Figure 8 This is a flowchart of an example of a method for controlling a range hood in a non-cooking state provided by an embodiment of the present application, such as Figure 8 As shown, the specific steps are as follows:

[0126] Step 801, determine whether the user turns on automatic ventilation, if yes, execute step 802, if no, execute step 801.

[0127] Step 802: Control the fan of the range hood to operate periodically according to the preset smoke detection interval.

[0128] Step 803: Keep the smoke collecting plate closed, and run the fan at the minimum fan speed to obtain the current smoke concentration X detected by the smoke sensor in real time. 0 , timing T Fan .

[0129] Step 804: Determine the current smoke density X 0 Is it greater than the preset first smoke density threshold A? 1 If yes, execute step 805, if no, execute step 808.

[0130] Step 805: Open the smoke collecting plate to perform ventilation function. The ventilation timing of the ventilation function is T Run.

[0131] Step 806, determine the current smoke density X 0 Is it less than the preset second smoke density threshold A? 0 If yes, execute step 807, if no, execute step 810.

[0132] Step 807, turn off the ventilation function and obtain the current ventilation timing duration, query the target smoke detection interval duration corresponding to the current ventilation timing duration in the pre-stored correspondence between the ventilation timing duration and the smoke detection interval duration, and update the target smoke detection interval duration to the preset smoke detection interval duration, and then execute step 801.

[0133] Step 808: Determine the timing duration T of this round of detection Fan Is it greater than the preset single-round detection time t? fan If yes, execute step 809, if no, execute step 803.

[0134] Step 809 , judging that the air quality is good, turning off the fan of the range hood, extending and storing the smoke detection interval according to a preset detection interval coefficient, and then executing step 801 .

[0135] Step 810, determine the timing duration T of the ventilation function Run Is it greater than the preset ventilation time threshold T? max If yes, execute step 807, if no, execute step 806.

[0136] The embodiment of the present application provides a control method for a range hood and a range hood, including: in a cooking state, obtaining a current smoke concentration detected in real time by a smoke sensor of the range hood; dynamically adjusting a current fan response current of the range hood according to a pre-stored correspondence between a smoke concentration range and a fan response current; when the current fan response current reaches a stable state, adjusting the current fan response current according to a current fan speed of the range hood, a current fan response current, a pre-stored correspondence between the fan response current and a standard fan speed, a preset fan response current adjustment rule, and the current smoke concentration; in a non-cooking state, adjusting the fan response current according to a preset The smoke detection interval duration controls the periodic operation of the range hood fan; during the operation of the range hood fan, the current smoke concentration detected by the smoke sensor in real time is obtained. If the current smoke concentration is greater than the preset first smoke concentration threshold, the ventilation function of the range hood is turned on until the current smoke concentration drops below the preset second smoke concentration threshold; the ventilation function is turned off, and the current ventilation timing duration is obtained. The target smoke detection interval duration corresponding to the current ventilation timing duration is queried in the pre-stored correspondence between the ventilation timing duration and the smoke detection interval duration, and the target smoke detection interval duration is updated to the preset smoke detection interval duration. The embodiment of the present application monitors the smoke concentration in real time, and dynamically adjusts the fan response current in combination with the pre-stored correspondence between the smoke concentration range and the fan response current, so that the range hood can intelligently match the fan power according to the change of the smoke concentration, thereby reducing unnecessary energy consumption and improving energy efficiency. After the fan reaches a stable state, it is further corrected in combination with the relationship between the fan speed, the response current and the standard speed, and the adjustment rules to achieve more accurate fan control, ensure the stable operation of the range hood, and improve the user experience. In the non-cooking state, by setting the smoke detection interval and periodically running the fan, low-frequency smoke concentration monitoring is achieved, ensuring indoor air quality while avoiding energy waste caused by frequent operation. When the smoke concentration exceeds the threshold, the ventilation function is automatically turned on, and the operating status is adjusted in real time according to the concentration change until the smoke concentration drops to a safe range, reducing manual intervention. By recording the ventilation timing duration and adjusting the smoke detection interval based on the corresponding relationship, the logical relationship between fan ventilation and detection is optimized, avoiding resource waste caused by frequent detection, while maintaining the long-term stability of indoor air quality. By intelligently adjusting the fan operating status and smoke detection frequency, the frequent start and stop and overload operation of the equipment are reduced, the equipment service life is extended, and the user's maintenance cost is reduced, while providing users with a smarter and more efficient cooking environment.

[0137] It should be understood that although Figures 2 to 8The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figures 2 to 8 At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0138] It can be understood that the same / similar parts between the various embodiments of the above method in this specification can refer to each other, and each embodiment focuses on the differences from other embodiments. For related points, please refer to the description of other method embodiments.

[0139] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0140] It should also be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for display, data for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0141] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0142] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0143] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A control method for a range hood, characterized in that: The method comprises: In the cooking state, obtain the current smoke concentration detected by the smoke sensor of the range hood in real time; Dynamically adjusting the current fan response current of the range hood according to the pre-stored correspondence between the smoke concentration range and the fan response current; When the current fan response current reaches a stable state, adjusting the current fan response current according to the current fan speed of the range hood, the current fan response current, the pre-stored correspondence between the fan response current and the fan standard speed, the preset fan response current adjustment rule and the current smoke concentration; In a non-cooking state, the fan of the range hood is controlled to operate periodically according to a preset smoke detection interval; During the operation of the fan of the range hood, the current smoke concentration detected by the smoke sensor in real time is obtained, and if the current smoke concentration is greater than a preset first smoke concentration threshold, the ventilation function of the range hood is turned on until the current smoke concentration drops below a preset second smoke concentration threshold; Turn off the ventilation function and obtain the current ventilation timing duration, query the target smoke detection interval duration corresponding to the current ventilation timing duration in the pre-stored correspondence between the ventilation timing duration and the smoke detection interval duration, and update the target smoke detection interval duration to the preset smoke detection interval duration.

2. The method according to claim 1, characterized in that The dynamically adjusting the current fan response current of the range hood according to the pre-stored correspondence between the smoke concentration range and the fan response current includes: In the pre-stored correspondence between the smoke concentration range and the fan response current, query in real time the target fan response current corresponding to the current smoke concentration range in which the current smoke concentration is located; The current fan response current of the range hood is adjusted in real time according to the target fan response current.

3. The method according to claim 1, characterized in that The method further comprises: When the duration during which the current fan response current remains unchanged is greater than the preset smoke stabilization duration, it is determined that the current fan response current reaches a stable state.

4. The method according to claim 1, characterized in that The adjusting the current fan response current according to the current fan speed of the range hood, the current fan response current, the pre-stored correspondence between the fan response current and the fan standard speed, the preset fan response current adjustment rule and the current smoke concentration includes: Acquire a current fan speed when the current fan response current reaches a stable state as a first fan speed; In the correspondence between the fan response current and the fan standard speed, query the target fan standard speed corresponding to the current fan response current; If the first fan speed is greater than the target fan standard speed, the preset maximum fan response current is used as the current fan response current; The current fan response current is adjusted according to the current fan speed of the range hood, the preset maximum fan speed and the preset current adjustment coefficient, and then the step of obtaining the current smoke concentration detected in real time by the smoke sensor of the range hood in the cooking state is performed; If the first fan speed is less than or equal to the target fan standard speed, the current fan response current is adjusted according to the current smoke concentration detected in real time and a preset fan response current adjustment rule.

5. The method according to claim 4, characterized in that The adjusting the current fan response current according to the current fan speed of the range hood, the preset maximum fan speed and the preset current adjustment coefficient includes: Obtaining the current fan speed at the maximum fan response current after a preset fan stabilization time as the second fan speed; If the second fan speed is greater than the maximum fan speed, maintaining the current fan response current; If the second fan speed is less than or equal to the preset maximum fan speed, the product of the preset current adjustment coefficient and the current fan response current is updated to the current fan response current.

6. The method according to claim 5, characterized in that The preset current regulation coefficient is 0.

5.

7. The method according to claim 4, characterized in that The step of adjusting the current fan response current according to the current smoke concentration detected in real time and a preset fan response current adjustment rule includes: If the current smoke concentration detected in real time decreases, a preset number of current gears are reduced based on the current fan response current, and then the step of adjusting the current fan response current according to the current fan speed of the range hood, the current fan response current, the pre-stored correspondence between the fan response current and the fan standard speed, the preset fan response current adjustment rule and the current smoke concentration is performed when the current fan response current reaches a stable state; If the current smoke concentration remains unchanged or increases, the step of obtaining the current smoke concentration detected in real time by the smoke sensor of the range hood in the cooking state is performed.

8. The method according to claim 1, characterized in that The method further comprises: When the fan of the range hood is controlled to operate periodically according to a preset smoke detection interval, a preset minimum fan speed is determined as the fan speed of the range hood.

9. The method according to claim 1, characterized in that: After obtaining the current smoke concentration detected in real time by the smoke sensor during the operation of the fan, the method further includes: If the current smoke concentration is less than or equal to the first smoke concentration threshold, and the timing duration is greater than the preset single-round detection duration, turning off the fan of the range hood; The smoke detection interval duration is extended and stored according to a preset detection interval coefficient.

10. A range hood, characterized in that: The range hood comprises a smoke sensor, a fan and a main control device, and implements the range hood control method according to any one of claims 1 to 9.

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