Control method of range hood

Abstract

The invention provides a control method of a range hood, which comprises the following steps: after the range hood is started, acquiring an operation gear of the range hood; in the operation process of the range hood, a temperature reduction value delta T above the cooking bench is obtained, and whether delta T is larger than or equal to a change threshold value or not is judged; if delta T is larger than or equal to the change threshold value, the operation gear of the range hood is heightened; if the delta T is smaller than the change threshold value, the gear adjusting mode of the range hood is determined according to the firepower value of the cooking bench. In the operation process of the range hood, gear adjustment is determined according to whether the temperature value above the cooking bench suddenly drops or not, the control logic of the range hood is simplified, meanwhile, the cooking bench temperature value and the firepower value are combined, the operation state and the movement gear of the range hood are closer to the actual situation, and the oil smoke extraction effect is further improved.

Description

Technical Field

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

[0002] During the use of the range hood, manual operation is required to control the start-up and operation of the range hood. If the range hood is always in operation during use, it will produce noise. If it is frequently turned on and off, the operation will be cumbersome and the control of the smoke extraction effect will not be precise. In order to better improve the smoke extraction effect of the range hood on oil smoke and improve the degree of automation of the start-up and operation of the range hood, the existing technology is fully developing a range hood control system that can achieve intelligent regulation.

[0003] Patent CN108916933A discloses an intelligent smoke stove linkage control system; wherein the driving control unit obtains the firepower value and the oil fume concentration value, determines the change of the firepower value, and selectively calls the oil fume concentration value according to the change of the firepower value, and sets the oil fume extraction gear according to the change of the firepower value and the oil fume concentration value. In this technical solution, the linkage control system intelligently adjusts the oil fume extraction state of the range hood according to the firepower value of the stove and the size of the oil fume, while the oil fume concentration needs to be detected by the oil fume sensor. Since the oil fume concentration itself can feedback the degree of oil fume, the control method combining the firepower value and the oil fume concentration in this technical solution makes the adjustment logic complicated, resulting in a long reaction time of the control system, which is not conducive to the timely and accurate cleaning of oil fume.

[0004] Patent CN115992961A discloses a range hood wind speed control method, wind speed control device and range hood, which controls the gear of the range hood based on the current smoke state, fire level, temperature initial value and current temperature data to control the fan air outlet speed of the range hood. This technical solution requires complex calculations to determine the temperature initial value and the current smoke state, which also complicates the entire logic, resulting in a long response time of the control system, which is not conducive to timely and accurate cleaning of oil smoke. Summary of the invention

[0005] In order to overcome the problems existing in the related art, the purpose of the present invention is to provide a control method for a range hood. During the operation of the range hood, the gear adjustment is determined according to whether the temperature value above the stove drops suddenly, thereby simplifying the range hood control logic. At the same time, the stove temperature value and the firepower value are combined, so that the operating state and movement gear of the range hood are closer to the actual situation, further improving the range hood extraction effect.

[0006] A control method for a range hood, comprising:

[0007] After the range hood is started, the operating gear of the range hood is obtained;

[0008] During the operation of the range hood, the temperature drop value ΔT above the stove is obtained, and it is determined whether ΔT is greater than or equal to the change threshold;

[0009] If ΔT is greater than or equal to the change threshold, the operating gear of the range hood is increased;

[0010] If ΔT is less than the change threshold, the range hood gear adjustment method is determined according to the fire power value of the stove.

[0011] The present application first determines whether the range hood is turned on according to the temperature value above the stove, and determines the operating gear after it is turned on. During operation, it will always monitor whether the temperature drop value ΔT above the stove is greater than or equal to the change threshold, that is, whether a sudden temperature drop occurs. If a sudden temperature drop occurs, it indicates that adding water to the pot in the cooking mode causes a sudden drop in temperature. At this time, a large amount of oil smoke will be released, so it is necessary to increase the operating gear of the range hood. The present application fully considers the phenomenon of sudden temperature drop during cooking and improves the accuracy of intelligent control of the range hood gear.

[0012] In a preferred technical solution of the present invention, the step of obtaining the temperature reduction value ΔT above the stove includes:

[0013] A temperature sensor is arranged above the stove, and the temperature sensor is electrically connected to a controller of the range hood;

[0014] The controller is provided with a judgment unit, and the judgment unit calculates the temperature reduction value ΔT above the stove according to the data monitored in real time by the temperature sensor.

[0015] The temperature sensor can be set in the range hood above the stove, and the temperature sensor is used to detect the temperature of the wok. The judgment unit is used to calculate whether the temperature of the wok has dropped suddenly based on the temperature value detected by the temperature sensor, that is, to judge whether the temperature reduction value ΔT above the stove is greater than or equal to the change threshold. The judgment unit may include components such as a calculator, which is used to calculate the difference between the temperature value currently transmitted by the temperature sensor and the temperature value transmitted last time, and then determine whether the temperature value in the wok has dropped suddenly. The present application monitors the temperature change above the stove in real time through a judgment unit connected to the temperature sensor, and can quickly monitor the temperature change value above the sensor, and then obtain information on whether a temperature drop has occurred during the cooking process. The judgment method is simple and quick.

[0016] In a preferred technical solution of the present invention, the range hood gear adjustment method is determined according to the firepower value, specifically including:

[0017] Get the fire value of the stove. If the fire value is greater than the fire threshold corresponding to the current gear, increase the range hood's operating gear.

[0018] If the firepower value is less than or equal to the firepower threshold corresponding to the current gear, the current operating gear is maintained.

[0019] When the temperature of the wok does not drop suddenly, you can continue to detect whether the firepower value exceeds the firepower threshold corresponding to the current gear. If it exceeds, it means that the firepower value in the stove has increased, and it is necessary to adjust the gear to increase the suction of the range hood. In the case that the temperature of the wok does not drop suddenly, this application judges the firepower value of the stove. If the firepower is increased, the operating gear is increased. If the firepower is not increased, the current operating gear is maintained. The control method is simple and convenient, and the temperature and firepower conditions are comprehensively considered, which improves the accuracy of the intelligent control of the range hood.

[0020] In a preferred technical solution of the present invention, a stove knob is provided in the stove, and the stove knob is connected to a firepower sensor, and the firepower sensor obtains the firepower value by monitoring the position of the stove knob.

[0021] Connecting the firepower sensor to the stove knob can help improve the accuracy of the firepower sensor in monitoring the firepower value. In actual operation, the position of the stove knob can accurately feedback the firepower value, and there is no need to perform various monitoring of the specific firepower value. This can not only simplify the structure of the firepower monitoring device, but also improve the accuracy of firepower value monitoring.

[0022] In a preferred technical solution of the present invention, the range hood gear adjustment method is determined according to the firepower value, and further includes:

[0023] If the firepower value is less than or equal to the firepower threshold corresponding to the current gear, maintain the current gear; and monitor whether the temperature value above the stove is greater than the temperature threshold corresponding to the current gear. If it is greater than the preset temperature threshold of the current gear, increase the operating gear of the range hood; if it is less than or equal to the preset temperature value of the current gear, maintain the current operating gear.

[0024] When the wok temperature does not drop suddenly, and the firepower value remains unchanged or changes within a certain range, that is, it does not exceed the firepower threshold corresponding to the current gear, there is no need to adjust the range hood gear. At the same time, it is necessary to further detect whether the temperature value above the stove is greater than the temperature threshold corresponding to the current gear. If it is greater than the temperature threshold preset for the current gear, it indicates that the food in the wok may have changed, causing the temperature to increase while the firepower value remains unchanged, resulting in more oil smoke, and the range hood needs to be adjusted to a higher operating gear; if it is less than or equal to the temperature value preset for the current gear, the current operating gear is maintained. The control method is simple and convenient, and comprehensively considers the firepower situation and the temperature value in the wok, improving the accuracy of the intelligent control of the range hood.

[0025] In a preferred technical solution of the present invention, after the range hood is started, obtaining the operating gear of the range hood includes:

[0026] Get the temperature value above the stove and determine whether the temperature value is greater than the initial temperature threshold; if it is greater than the initial temperature threshold, control the range hood to turn on and start running at the first gear; if it is less than or equal to the initial temperature threshold, the range hood will not start.

[0027] In a preferred technical solution of the present invention, after the range hood starts to run at the first gear, the temperature value above the stove is obtained to determine whether the temperature value is greater than the first temperature threshold. If it is greater than the first temperature threshold, the range hood is controlled to start running at the second gear. If it is less than or equal to the first temperature threshold, the range hood maintains the first gear operation. At the same time, the temperature reduction value ΔT above the stove is obtained, and it is determined whether ΔT is greater than or equal to the change threshold; wherein the first temperature threshold is greater than the initial temperature threshold, and the suction force of the second gear on the oil fume is greater than the suction force of the first gear on the oil fume.

[0028] In a preferred technical solution of the present invention, after the range hood starts to operate at the second gear, the temperature value above the stove is obtained to determine whether the temperature value is greater than the second temperature threshold. If it is greater than the second temperature threshold, the range hood is controlled to start operating at the third gear. If it is less than or equal to the second temperature threshold, the range hood maintains the second gear operation. At the same time, the temperature reduction value ΔT above the stove is obtained, and it is determined whether ΔT is greater than or equal to the change threshold; wherein the second temperature threshold is greater than the first temperature threshold, and the suction force of the third gear on the oil fume is greater than the suction force of the second gear on the oil fume.

[0029] Normally, the temperature change value exceeding the upper limit is a gradual change process, that is, the range hood starts running at the first gear, and gradually increases the running gear as the temperature gradually rises. This application can not only ensure the automatic control of the running gear, but also ensure that the running gear matches the temperature, thereby improving the intelligent and precise control of the range hood.

[0030] In a preferred technical solution of the present invention, during the operation of the range hood, if one of the following three situations occurs, the operation gear of the range hood is increased;

[0031] Case 1: The temperature drop value ΔT above the stove is greater than or equal to the change threshold;

[0032] Case 2: The fire value in the stove is greater than the fire threshold corresponding to the current gear;

[0033] Case 3: The temperature above the stove is greater than the temperature threshold corresponding to the current gear.

[0034] The above three situations in the present application can be in a parallel relationship, that is, in any one of the situations, the range hood is directly controlled to adjust to the next increased operating gear, which can improve the efficiency of oil fume extraction.

[0035] In a preferred technical solution of the present invention, during the operation of the range hood, the adjustment priority of situation one is greater than the adjustment priority of situation two, and the adjustment priority of situation two is greater than the adjustment priority of situation three.

[0036] The above three situations of the present application may also have a certain priority order. Specifically, the adjustment priority of situation one is greater than the adjustment priority of situation two, and the adjustment priority of situation two is greater than the adjustment priority of situation three. That is, when the range hood is in the current operating gear, first monitor whether the temperature reduction value ΔT above the stove is greater than or equal to the change threshold. If ΔT is greater than or equal to the change threshold, the operating gear is raised. If it is less than the change threshold, further monitor whether the firepower value in the stove is greater than the firepower threshold corresponding to the current gear. If it is greater than the firepower threshold corresponding to the current gear, increase the operating gear. If it is less than or equal to the firepower threshold corresponding to the current gear, further monitor whether the temperature value above the stove is greater than the temperature threshold corresponding to the current gear. If it is greater than the temperature threshold corresponding to the current gear, increase the operating gear. If it is less than or equal to the temperature threshold corresponding to the current gear, continue to repeatedly detect and monitor whether the temperature reduction value ΔT above the stove is greater than or equal to the change threshold. This can improve the accuracy of range hood control.

[0037] The beneficial effects of the present invention are:

[0038] The present invention provides a control method for a range hood, comprising: after the range hood is started, obtaining the operating gear of the range hood; during the operation of the range hood, obtaining the temperature reduction value ΔT above the stove, and judging whether ΔT is greater than or equal to the change threshold; if ΔT is greater than or equal to the change threshold, raising the operating gear of the range hood; if ΔT is less than the change threshold, determining the gear adjustment mode of the range hood according to the firepower value of the stove. The present application first determines whether the range hood is turned on according to the temperature value above the stove, and determines the operating gear after it is turned on. During the operation, it will always monitor whether the temperature reduction value ΔT above the stove is greater than or equal to the change threshold, that is, whether a sudden temperature drop occurs. If a sudden temperature drop occurs, it indicates that adding water to the pot in the cooking mode causes a sudden temperature drop, and a large amount of oil smoke will be released at this time, so it is necessary to increase the operating gear of the range hood; the present application fully considers the phenomenon of sudden temperature drop during cooking, and improves the accuracy of intelligent control of the range hood gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of a range hood and a stove;

[0040] Figure 2 This is a top view of the stove;

[0041] Figure 3 Schematic diagram of the control method in Example 3.

[0042] Reference numerals:

[0043] 11. Temperature sensor; 12. Stove knob; 13. Wok. DETAILED DESCRIPTION

[0044] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0045] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0046] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0047] Example 1

[0048] like Figure 1-Figure 2 As shown, a control method for a range hood includes:

[0049] After the range hood is started, the operating gear of the range hood is obtained;

[0050] During the operation of the range hood, the temperature drop value ΔT above the stove is obtained, and it is determined whether ΔT is greater than or equal to the change threshold;

[0051] If ΔT is greater than or equal to the change threshold, the operating gear of the range hood is increased;

[0052] If ΔT is less than the change threshold, the range hood gear adjustment method is determined according to the fire power value of the stove.

[0053] The present application first determines whether the range hood is turned on according to the temperature value above the stove, and determines the operating gear after it is turned on. During operation, it will always monitor whether the temperature drop value ΔT above the stove is greater than or equal to the change threshold, that is, whether a sudden temperature drop occurs. If a sudden temperature drop occurs, it indicates that adding water to the pot in the cooking mode causes a sudden drop in temperature. At this time, a large amount of oil smoke will be released, so it is necessary to increase the operating gear of the range hood. The present application fully considers the phenomenon of sudden temperature drop during cooking and improves the accuracy of intelligent control of the range hood gear.

[0054] In this application, the range hood is located above the stove. Figure 1 shown.

[0055] The temperature value above the stove can be obtained by the temperature sensor 11. The temperature sensor 11 can be set at the bottom of the wok or the bottom of the range hood to collect the temperature of the wok 13 on the stove, and convert the collected data into a control signal of the range hood to control the start and gear of the range hood, so as to achieve an intelligent control state without human operation. When the temperature on the wok reaches a certain set temperature value, the range hood is started; when the temperature on the wok reaches another set value, the corresponding gear is increased for speed regulation, so as to adjust and match the corresponding range hood speed gear according to different wok temperatures.

[0056] In the present application, the wok 13 is a utensil placed on a stove for cooking. The oil fume during cooking is also generated in the wok. The oil fume is a gasified mist generated by the high-temperature wok when cooking food.

[0057] In the present application, the firepower value is determined according to the degree of switching of the stove knob 12. When high firepower is required, the angle at which the stove knob 12 is turned becomes larger, and when low firepower is required, the angle at which the stove knob 12 is turned becomes smaller. The conditions for the generation of oil smoke are determined by the temperature of the wok and the firepower value. That is, when the firepower remains unchanged, the temperature of the wok drops instantly, which may be caused by pouring water into the wok when cooking, and the oil smoke generated at this time is relatively large. Therefore, simply controlling the temperature of the wok cannot completely determine the amount of oil smoke released, and the wok temperature and the firepower need to be determined at the same time.

[0058] Example 2

[0059] This embodiment is described by taking the case where the pot cover is not used during cooking as an example. If the pot cover is used, the judgment of the temperature change value will be affected.

[0060] like Figure 1 and Figure 2As shown, in the present application, a temperature sensor 11 is arranged above the stove, and the temperature sensor 11 is communicatively connected with the judgment unit, and the judgment unit calculates the temperature reduction value ΔT above the stove according to the data monitored in real time by the temperature sensor 11 .

[0061] The temperature sensor can be set in the range hood above the stove, and the temperature sensor is used to detect the temperature of the wok. The judgment unit is used to calculate whether the temperature of the wok has dropped suddenly based on the temperature value detected by the temperature sensor, that is, to judge whether the temperature reduction value ΔT above the stove is greater than or equal to the change threshold. The judgment unit may include components such as a calculator, which is used to calculate the difference between the temperature value currently transmitted by the temperature sensor and the temperature value transmitted last time, and then determine whether the temperature value in the wok has dropped suddenly. The present application monitors the temperature change above the stove in real time through a judgment unit connected to the temperature sensor, and can quickly monitor the temperature change value above the sensor, and then obtain information on whether a temperature drop has occurred during the cooking process. The judgment method is simple and quick.

[0062] like Figure 1 and Figure 2 As shown, the stove of the present application is provided with a stove knob 12, and the stove knob 12 is connected to a firepower sensor, and the firepower sensor obtains the firepower value by monitoring the position of the stove knob 11. The frying pan 12 is placed at the fire outlet of the stove.

[0063] Connecting the firepower sensor to the stove knob can help improve the accuracy of the firepower sensor in monitoring the firepower value. In actual operation, the position of the stove knob can accurately feedback the firepower value, and there is no need to perform various monitoring of the specific firepower value. This can not only simplify the structure of the firepower monitoring device, but also improve the accuracy of firepower value monitoring.

[0064] like Figure 1-Figure 2 As shown, a control method for a range hood includes:

[0065] S1: After the range hood is started, the operating gear of the range hood is obtained;

[0066] S2: During the operation of the range hood, obtain the temperature drop value ΔT above the stove, and determine whether ΔT is greater than or equal to the change threshold;

[0067] If ΔT is greater than or equal to the change threshold, the operating gear of the range hood is increased;

[0068] If ΔT is less than the change threshold, the range hood gear adjustment method is determined according to the fire power value of the stove.

[0069] In this application, the range hood gear adjustment method is determined according to the firepower value, specifically including:

[0070] S21: Obtain the firepower value of the stove, and if the firepower value is greater than the firepower threshold corresponding to the current gear, increase the operating gear of the range hood;

[0071] S22: If the firepower value is less than or equal to the firepower threshold corresponding to the current gear, the current operating gear is maintained.

[0072] The present application can set the corresponding relationship between the operating gear and the firepower value in the range hood, for example, the first firepower threshold corresponding to the first gear is set to A0-A1, the second firepower threshold corresponding to the second gear is set to A1-A2, and the third firepower threshold corresponding to the third gear is set to A2-A3, wherein the firepower values ​​corresponding to A0, A1, A2, and A3 gradually increase, and the suction force of the first gear, the second gear, and the third gear on the oil smoke in the stove gradually increases. This means that when the firepower value is within the range of A0-A1, the range hood maintains the first gear for the best exhaust effect; when the firepower value is within the range of A1-A2, the range hood maintains the second gear for the best exhaust effect; when the firepower value is within the range of A2-A3, the range hood maintains the third gear for the best exhaust effect.

[0073] When the temperature of the wok does not drop suddenly, you can continue to detect whether the firepower value exceeds the firepower threshold corresponding to the current gear. If it exceeds, it means that the firepower value in the stove has increased, and it is necessary to adjust the gear to increase the suction of the range hood. In the case that the temperature of the wok does not drop suddenly, this application judges the firepower value of the stove. If the firepower is increased, the operating gear is increased. If the firepower is not increased, the current operating gear is maintained. The control method is simple and convenient, and the temperature and firepower conditions are comprehensively considered, which improves the accuracy of the intelligent control of the range hood.

[0074] S23: Further monitor whether the temperature value above the stove is greater than the temperature threshold corresponding to the current gear. If it is greater than the temperature threshold preset for the current gear, increase the operating gear of the range hood; if it is less than or equal to the temperature value preset for the current gear, maintain the current operating gear.

[0075] The present application can set the corresponding relationship between the operating gear and the temperature threshold in the range hood, for example, the initial temperature threshold is set to T0, that is, when the temperature reaches this temperature, the range hood starts to start the exhaust mode. The first temperature threshold corresponding to the first gear is T0-T1, the second temperature threshold corresponding to the second gear is set to T1-T2, and the third temperature threshold corresponding to the third gear is set to T2-T3, wherein the temperature values ​​corresponding to T0, T1, T2, and T3 gradually increase, and the suction force of the first gear, the second gear, and the third gear on the oil smoke in the stove gradually increases. This means that when the temperature value is within the range of T0-T1, the range hood maintains the best exhaust effect at the first gear; when the temperature value is within the range of T1-T2, the range hood maintains the best exhaust effect at the second gear; and when the temperature value is within the range of T2-T3, the range hood maintains the best exhaust effect at the third gear.

[0076] When the wok temperature does not drop suddenly, and the firepower value remains unchanged or changes within a certain range, that is, it does not exceed the firepower threshold corresponding to the current gear, there is no need to adjust the range hood gear. At the same time, it is necessary to further detect whether the temperature value above the stove is greater than the temperature threshold corresponding to the current gear. If it is greater than the temperature threshold preset for the current gear, it indicates that the food in the wok may have changed, causing the temperature to increase while the firepower value remains unchanged, resulting in more oil smoke, and the range hood needs to be adjusted to a higher operating gear; if it is less than or equal to the temperature value preset for the current gear, the current operating gear is maintained. The control method is simple and convenient, and comprehensively considers the firepower situation and the temperature value in the wok, improving the accuracy of the intelligent control of the range hood.

[0077] Example 3

[0078] like Figure 1-Figure 2 As shown, a control method for a range hood includes:

[0079] S1: After the range hood is started, the operating gear of the range hood is obtained; specifically, the following steps are performed:

[0080] Get the temperature value above the stove and determine whether the temperature value is greater than the initial temperature threshold; if it is greater than the initial temperature threshold, control the range hood to turn on and start running at the first gear; if it is less than or equal to the initial temperature threshold, the range hood will not start;

[0081] When the range hood starts to run at the first gear, the temperature value above the stove is obtained to determine whether the temperature value is greater than the first temperature threshold. If it is greater than the first temperature threshold, the range hood is controlled to start running at the second gear. If it is less than or equal to the first temperature threshold, the range hood maintains the first gear operation. At the same time, the temperature reduction value ΔT above the stove is obtained, and it is determined whether ΔT is greater than or equal to the change threshold; wherein the first temperature threshold is greater than the initial temperature threshold, and the suction force of the second gear on the oil fume is greater than the suction force of the first gear on the oil fume.

[0082] After the range hood starts to run at the second gear, the temperature value above the stove is obtained to determine whether the temperature value is greater than the second temperature threshold. If it is greater than the second temperature threshold, the range hood is controlled to start running at the third gear. If it is less than or equal to the second temperature threshold, the range hood maintains the second gear operation. At the same time, the temperature reduction value ΔT above the stove is obtained, and it is determined whether ΔT is greater than or equal to the change threshold; wherein the second temperature threshold is greater than the first temperature threshold, and the suction force of the third gear on the oil fume is greater than the suction force of the second gear on the oil fume.

[0083] Similar to Example 2,

[0084] It should be noted that the range hood is powered on when cooking in a wok, and the exhaust is not started at this time, but the temperature sensor has begun to detect the temperature above the stove. When the temperature reaches the initial temperature threshold, the range hood starts to run at the first gear. If the temperature changes greatly and rises directly to the first temperature threshold, the range hood starts to run at the second gear. If the temperature changes significantly and rises directly to the second temperature threshold, the range hood starts to run at the third gear.

[0085] Normally, the temperature change value exceeding the upper limit is a gradual change process, that is, the range hood starts running at the first gear, and gradually increases the running gear as the temperature gradually rises. This application can not only ensure the automatic control of the running gear, but also ensure that the running gear matches the temperature, thereby improving the intelligent and precise control of the range hood.

[0086] S2: During the operation of the range hood, obtain the temperature drop value ΔT above the stove, and determine whether ΔT is greater than or equal to the change threshold;

[0087] If ΔT is greater than or equal to the change threshold, the operating gear of the range hood is increased;

[0088] If ΔT is less than the change threshold, the range hood gear adjustment method is determined according to the fire power value of the stove.

[0089] During the operation of step S1, that is, when the temperature is maintained at the temperature threshold of the corresponding gear, step S2 will also be executed, and the judgment unit will judge in real time whether the temperature reduction value ΔT above the stove is greater than or equal to the change threshold; if ΔT is greater than or equal to the change threshold, the operation gear of the range hood is increased;

[0090] If ΔT is less than the change threshold, the firepower value continues to be monitored. If the firepower value is greater than the firepower threshold corresponding to the current gear, the operating gear of the range hood is increased;

[0091] If the firepower value is less than or equal to the firepower threshold corresponding to the current gear, the current operating gear is maintained. And monitor whether the temperature value above the stove is greater than the temperature threshold corresponding to the current gear. If it is greater than the preset temperature threshold of the current gear, the operating gear of the range hood is increased; if it is less than or equal to the preset temperature value of the current gear, the current operating gear is maintained.

[0092] In summary, in the process of operation of the range hood, if one of the following three situations occurs, the operation gear of the range hood needs to be increased;

[0093] Case 1: The temperature drop ΔT above the stove is greater than or equal to the change threshold; that is, water is added to the wok while cooking, which will produce a lot of oil smoke and require a higher operating gear.

[0094] Case 2: The fire value in the stove is greater than the fire threshold corresponding to the current gear; that is, the fire power of the wok is increased, which will produce a lot of oil smoke and requires a larger operating gear.

[0095] Case 3: The temperature value above the stove is greater than the temperature threshold corresponding to the current gear. The increase in temperature may indicate that the firepower has been increased or the food in the wok has changed, such as being burnt or on fire, etc., which will produce a lot of oil smoke and requires a higher operating gear.

[0096] It should be noted that the above three situations in the present application can be in a parallel relationship, that is, in any one of the situations, the range hood is directly controlled to adjust to the next increased operating gear, which can improve the efficiency of oil fume extraction.

[0097] The above three situations of the present application may also have a certain priority order. Specifically, the adjustment priority of situation one is greater than the adjustment priority of situation two, and the adjustment priority of situation two is greater than the adjustment priority of situation three. That is, when the range hood is in the current operating gear, first monitor whether the temperature reduction value ΔT above the stove is greater than or equal to the change threshold. If ΔT is greater than or equal to the change threshold, the operating gear is raised. If it is less than the change threshold, further monitor whether the firepower value in the stove is greater than the firepower threshold corresponding to the current gear. If it is greater than the firepower threshold corresponding to the current gear, increase the operating gear. If it is less than or equal to the firepower threshold corresponding to the current gear, further monitor whether the temperature value above the stove is greater than the temperature threshold corresponding to the current gear. If it is greater than the temperature threshold corresponding to the current gear, increase the operating gear. If it is less than or equal to the temperature threshold corresponding to the current gear, continue to repeatedly detect and monitor whether the temperature reduction value ΔT above the stove is greater than or equal to the change threshold. This can improve the accuracy of range hood control.

[0098] Example 4

[0099] This embodiment is described by taking the case where the pot cover is not used during cooking as an example. If the pot cover is used, the judgment of the temperature change value will be affected.

[0100] like Figure 1 and Figure 2 As shown, in the present application, a temperature sensor 11 is arranged above the stove, and the temperature sensor 11 is communicatively connected with the judgment unit, and the judgment unit calculates the temperature reduction value ΔT above the stove according to the data monitored in real time by the temperature sensor 11 .

[0101] like Figure 1 and Figure 2 As shown, the stove of the present application is provided with a stove knob 12, and the stove knob 12 is connected to a firepower sensor, and the firepower sensor obtains the firepower value by monitoring the position of the stove knob 12. The wok 12 is placed at the fire outlet of the stove.

[0102] The present application sets the range hood to the first gear, the second gear, the third gear and the fourth gear from small to large. The first firepower threshold corresponding to the first gear is A0-A1, the second firepower threshold corresponding to the second gear is A1-A2, the third firepower threshold corresponding to the third gear is A2-A3, and the fourth firepower threshold corresponding to the fourth gear is greater than A3.

[0103] Set the initial temperature threshold corresponding to the first gear to T0, the first temperature threshold to T0-T1, the second temperature threshold corresponding to the second gear to T1-T2, the third temperature threshold corresponding to the third gear to T2-T3, and the fourth temperature threshold corresponding to the fourth gear is greater than T3.

[0104] like Figure 3 As shown, a control method for a range hood includes:

[0105] The wok is placed on the stove and is ready to start cooking. The range hood is powered on and in standby mode. In the standby mode, the temperature sensor, the fire power sensor and the judgment unit operate normally.

[0106] The temperature sensor collects the temperature value above the wok; and determines whether the temperature value of the wok is greater than the initial temperature threshold. If it is greater than the initial temperature threshold, the range hood operates at the first gear. If it is less than or equal to the initial temperature threshold, the temperature sensor continues to collect the temperature value above the wok.

[0107] When the range hood is running at the first gear, if one of the following three situations occurs, the range hood needs to be adjusted to a higher gear;

[0108] Case 1: The temperature drop value ΔT of the wok is greater than or equal to the change threshold; that is, water is added to the wok while cooking, which will produce a lot of oil smoke and require a higher gear. The change threshold here can be a specific value, such as 10°C, that is, when the temperature drops to more than 10°C, it is considered that the wok temperature has dropped sharply.

[0109] If the temperature reduction value ΔT of the wok is less than the change threshold, the wok firepower value continues to be monitored.

[0110] Case 2: The firepower value under the wok is greater than the first firepower threshold; that is, the firepower of the wok is increased, which will produce a large amount of oil smoke and requires a larger operating gear.

[0111] If the fire value under the wok is less than or equal to the first fire threshold, continue to monitor whether the wok temperature is greater than the first temperature threshold.

[0112] Case 3: The wok temperature value is greater than the first temperature threshold. The increase in temperature may indicate that the fire has been increased or the food in the wok has changed, such as being burnt or on fire, etc. This will produce a lot of oil smoke and the operating gear needs to be increased.

[0113] If the temperature value exceeded is less than or equal to the first temperature threshold, continue to monitor whether the wok temperature drops suddenly, and whether the wok fire value is greater than the first fire threshold, until one of the above conditions is met, then increase the range hood operating gear so that the range hood operates at the second gear.

[0114] When the range hood is running at the second gear, if one of the following three situations occurs, the range hood needs to be adjusted to a higher gear;

[0115] Case 1: The temperature drop value ΔT of the wok is greater than or equal to the change threshold; that is, water is added to the wok while cooking, which will produce a lot of oil smoke and require a higher gear. The change threshold here can be a specific value, such as 8°C, that is, when the temperature drops to more than 8°C, it is considered that the wok temperature has dropped sharply.

[0116] If the temperature reduction value ΔT of the wok is less than the change threshold, the wok firepower value continues to be monitored.

[0117] Case 2: The firepower value under the wok is greater than the second firepower threshold; that is, the firepower of the wok is increased, which will produce a large amount of oil smoke and requires a larger operating gear.

[0118] If the fire value under the wok is less than or equal to the second fire value threshold, continue to monitor whether the wok temperature is greater than the second temperature threshold.

[0119] Case 3: The wok temperature is greater than the second temperature threshold. The increase in temperature may indicate that the fire has been increased or the food in the wok has changed, such as being burnt or on fire, etc. This will produce a lot of oil smoke and the operating gear needs to be increased.

[0120] If the temperature value exceeded is less than or equal to the second temperature threshold, continue to monitor whether the wok temperature drops suddenly, and whether the wok fire value is greater than the second fire threshold, until one of the above conditions is met, then increase the range hood operating gear so that the range hood operates at the third gear.

[0121] When the range hood is running at the third gear, if one of the following three situations occurs, the range hood needs to be adjusted to a higher gear;

[0122] Case 1: The wok temperature drop value ΔT is greater than or equal to the change threshold; that is, water is added to the wok while cooking, which will produce a lot of oil smoke and require a higher gear. The change threshold here can be a specific value, such as 6°C, that is, when the temperature drops to more than 6°C, it is considered that the wok temperature has dropped sharply.

[0123] If the temperature reduction value ΔT of the wok is less than the change threshold, the wok firepower value continues to be monitored.

[0124] Case 2: The firepower value under the wok is greater than the third firepower threshold; that is, the firepower of the wok is increased, which will produce a large amount of oil smoke and requires a larger operating gear.

[0125] If the fire value under the wok is less than or equal to the third fire value threshold, continue to monitor whether the wok temperature is greater than the third temperature threshold.

[0126] Case 3: The wok temperature is greater than the third temperature threshold. The increase in temperature may indicate that the fire has been increased or the food in the wok has changed, such as being burnt or on fire, etc. This will produce a lot of oil smoke and the operating gear needs to be increased.

[0127] If the temperature value is less than or equal to the third temperature threshold, the system will continue to monitor whether the wok temperature drops suddenly and whether the wok fire value is greater than the third fire value threshold until one of the above conditions is met, then the range hood operation gear is raised to make the range hood operate at the fourth gear. The fourth gear is the highest gear that the range hood can operate until the cooking is finished, and then the range hood is turned off.

[0128] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings. In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0129] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0130] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0131] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for controlling a range hood, characterized in that: include: After the range hood is started, the operating gear of the range hood is obtained; During the operation of the range hood, the temperature drop value ΔT above the stove is obtained, and it is determined whether ΔT is greater than or equal to the change threshold; If ΔT is greater than or equal to the change threshold, the operating gear of the range hood is increased; If ΔT is less than the change threshold, the range hood gear adjustment method is determined according to the fire power value of the stove.

2. The control method of a range hood according to claim 1, characterized in that: The step of obtaining the temperature reduction value ΔT above the stove comprises: A temperature sensor is arranged above the stove, and the temperature sensor is electrically connected to a controller of the range hood; The controller is provided with a judgment unit, and the judgment unit calculates the temperature reduction value ΔT above the stove according to the data monitored in real time by the temperature sensor.

3. The control method of a range hood according to claim 1, characterized in that: The range hood gear adjustment method is determined according to the fire value of the stove, including: Get the fire value of the stove. If the fire value is greater than the fire threshold corresponding to the current gear, increase the range hood's operating gear. If the firepower value is less than or equal to the firepower threshold corresponding to the current gear, the current operating gear is maintained.

4. The control method of a range hood according to claim 3, characterized in that: The stove is provided with a stove knob, and the stove knob is connected to a firepower sensor, and the firepower sensor obtains the firepower value by monitoring the position of the stove knob.

5. The control method of a range hood according to claim 3, characterized in that: The range hood gear adjustment method is determined according to the firepower value, and also includes: If the firepower value is less than or equal to the firepower threshold corresponding to the current gear, maintain the current gear; and monitor whether the temperature value above the stove is greater than the temperature threshold corresponding to the current gear. If it is greater than the preset temperature threshold of the current gear, increase the operating gear of the range hood; if it is less than or equal to the preset temperature value of the current gear, maintain the current operating gear.

6. The control method of a range hood according to claim 1, characterized in that: After the range hood is started, obtain the range hood's operating position, including: Get the temperature value above the stove and determine whether the temperature value is greater than the initial temperature threshold; if it is greater than the initial temperature threshold, control the range hood to turn on and start running at the first gear; if it is less than or equal to the initial temperature threshold, the range hood will not start.

7. The control method of a range hood according to claim 6, characterized in that: When the range hood starts to run at the first gear, the temperature value above the stove is obtained to determine whether the temperature value is greater than the first temperature threshold. If it is greater than the first temperature threshold, the range hood is controlled to start running at the second gear. If it is less than or equal to the first temperature threshold, the range hood maintains the first gear operation. At the same time, the temperature reduction value ΔT above the stove is obtained, and it is determined whether ΔT is greater than or equal to the change threshold; wherein the first temperature threshold is greater than the initial temperature threshold, and the suction force of the second gear on the oil fume is greater than the suction force of the first gear on the oil fume.

8. The control method of a range hood according to claim 7, characterized in that: After the range hood starts to run at the second gear, the temperature value above the stove is obtained to determine whether the temperature value is greater than the second temperature threshold. If it is greater than the second temperature threshold, the range hood is controlled to start running at the third gear. If it is less than or equal to the second temperature threshold, the range hood maintains the second gear operation. At the same time, the temperature reduction value ΔT above the stove is obtained, and it is determined whether ΔT is greater than or equal to the change threshold; wherein the second temperature threshold is greater than the first temperature threshold, and the suction force of the third gear on the oil fume is greater than the suction force of the second gear on the oil fume.

9. The control method of a range hood according to claim 1, characterized in that: During the operation of the range hood, if one of the following three situations occurs, the range hood's operating gear will be raised; Case 1: The temperature drop value ΔT above the stove is greater than or equal to the change threshold; Case 2: The fire value in the stove is greater than the fire threshold corresponding to the current gear; Case 3: The temperature above the stove is greater than the temperature threshold corresponding to the current gear.

10. The control method of a range hood according to claim 1, characterized in that: During the operation of the range hood, the adjustment priority of situation one is greater than that of situation two, and the adjustment priority of situation two is greater than that of situation three.

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