Smoke stove linkage method

Abstract

The invention discloses a range hood and kitchen range linkage method which is characterized in that a user starts a range hood and a kitchen range, the range hood is made to operate at the power Pt, and the kitchen range burns at the firepower Ht; the control module detects the rotating speed Rt of the smoke exhaust fan in real time and compares the Rt with the preset rotating speed R of Pt: if Rt is greater than R, Rt-R is greater than delta R1, and the running gear of the range hood is not the highest gear, the control module increases the running power of the smoke exhaust fan; if Rt is smaller than R, R-Rt is larger than delta R1, and the operation gear of the range hood is not the lowest gear, the control module reduces the operation power of the smoke exhaust fan; if / R-Rt / is smaller than or equal to delta R1, the control module enables the smoke exhaust fan to operate at the existing power; compared with the prior art, the range hood and stove linkage method has the advantages that the main control module of the range hood compares the actual rotation speed Rt of the current gear of the smoke exhaust fan with the preset rotation speed R, whether the operation gear of the range hood needs to be increased or decreased can be judged according to the size relation between the actual rotation speed Rt and the preset rotation speed R, and a user can freely select a stove by himself / herself.

Description

Technical Field

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

[0002] The range hood is an exhaust device in the kitchen. The exhaust fan is installed in the air collecting chamber of the range hood. When the range hood is started, the exhaust fan runs to exhaust the oil smoke generated by the user's cooking, so as to provide a healthy cooking environment for the user. In the process of cooking, in order to make the range hood only controllable, the existing range hood and stove are set as a set. The range hood and stove can interact through communication line connection, wireless communication, infrared, radio frequency, Bluetooth, wifi and other methods. In the process of cooking, when the combustion fire of the stove is adjusted, the operating power of the exhaust fan of the range hood changes accordingly, realizing the linkage between the range hood and the stove, so that the range hood can be controlled by adjusting the fire power unilaterally. The linkage between the range hood and the stove can not only make the range hood respond to the change of the stove fire power in time, while ensuring the smoke extraction effect of the range hood on the oil smoke, it can also save the operating power of the range hood, and it can also facilitate users, so that users can concentrate on cooking in school without having to adjust the operating power of the range hood back and forth. However, the range hoods that can be linked with the range hood and the stove are all sold as a set, and the range hoods of different brands cannot be linked with the range hood and the stove, which limits the user's independent choice of range hoods and stoves. Summary of the invention

[0003] The purpose of the present invention is to provide a smoke and stove linkage method, which is used to solve the above technical problems.

[0004] A smoke and stove linkage method is used for linkage between a range hood and a stove. The range hood has a smoke exhaust fan and a main control module. The smoke exhaust fan has an operating power Pt and a preset speed R corresponding to the operating power Pt. The stove has a combustion firepower value Ht. The main control module adjusts the operating power of the smoke exhaust fan according to the predicted combustion firepower value of the stove. The smoke and stove linkage method is:

[0005] The user starts the range hood and the stove, and makes the range hood run at power Pt and the stove burn at power Ht;

[0006] The control module detects the speed Rt of the exhaust fan in real time and compares Rt with the preset speed R of Pt:

[0007] If Rt>R, and Rt-R>ΔR1, and the operating gear of the smoke exhaust fan is not the highest gear, the control module increases the operating power of the smoke exhaust fan;

[0008] If Rt<R, and R-Rt>ΔR1, and the operating gear of the smoke exhaust fan is not the lowest gear, the control module reduces the operating power of the smoke exhaust fan;

[0009] If / R-Rt / ≤ΔR1, the control module operates the smoke exhaust fan at the existing power.

[0010] According to an embodiment of the present invention, if Rt<R, and R-Rt≥ΔR2, the control module increases the operating power of the smoke exhaust fan, and ΔR2 is greater than ΔR1.

[0011] According to one embodiment of the present invention, the range hood has four gears: low, medium, high and stir-fry; the smoke exhaust fan has four operating powers P1, P2, P3 and P4 corresponding to the four gears: low, medium, high and stir-fry; the preset speed R of the smoke exhaust fan includes R1, R2, R3 and R4, and P1, P2, P3 and P4 correspond to R1, R2, R3 and R4 one by one, wherein P1<P2<P3<P4, R1<R2<R3<R4.

[0012] According to one embodiment of the present invention, the fire power value Ht of the stove combustion includes low fire H1, medium fire H2 and high fire H3. The method for the main control module to predict the fire power value of the stove combustion is: if Pt = P1, and / R1-Rt / < ΔR1, the main control module determines that the stove is running at low fire H1, and the exhaust fan is kept running at power P1; if R1>R, and R1-R> ΔR1, the main control module determines that the stove is running at medium fire H2, and the main control module makes the exhaust fan run at power P2 operation; if Pt=P2, and / R2-Rt / <ΔR1, the main control module determines that the stove is running at medium fire H2, and makes the smoke exhaust fan maintain power P2 operation; if R2>R, and R2-R>ΔR1, the main control module determines that the stove is running at high fire H3, and the main control module makes the smoke exhaust fan run at power P3; if the main control module determines that the stove is running at high fire H3, at this time Rt>R, and Rt-R>ΔR1, the main control module makes the smoke exhaust fan run at power P4.

[0013] According to an embodiment of the present invention, the fire power value Ht of the stove combustion also includes turning off the fire H0. If Pt=P1, Rt<R1, and R1-Rt<ΔR3, the main control module determines that the stove is turned off, wherein ΔR3<ΔR1.

[0014] According to an embodiment of the present invention, when the main control module determines that the stove is turned off, the main control module allows the smoke exhaust fan to continue to run for a time T, and then stops the smoke exhaust fan.

[0015] According to one embodiment of the present invention, when the main control module determines that the cooker is in the off state and the range hood enters the delayed off state, the user can switch the range hood to the off state at any time by pressing the on / off button of the range hood.

[0016] According to one embodiment of the present invention, when the main control module determines that the stove is turned off, the main control module continues to detect the speed Rt of the smoke exhaust fan in real time. If R-Rt<ΔR4, the main control module stops the smoke exhaust fan, wherein ΔR4<ΔR3.

[0017] Compared with the prior art, the control method of the range hood of the present invention has the following advantages:

[0018] According to the control method of the range hood of the present invention, the range hood and the stove do not need to be complete sets of products of the same brand, and the range hood and the stove do not need to interact with each other through any means such as communication line connection, wireless communication, infrared, radio frequency, Bluetooth, wifi, etc. The main control module of the range hood compares the actual Rt of the smoke exhaust fan at the current gear and the preset speed R, and can judge whether the current operating unit of the range hood matches the current firepower of the stove based on the relationship between the two, and can judge whether the operating gear of the range hood needs to be increased or decreased based on the relationship between the actual speed Rt of the smoke exhaust fan at the current gear and the preset speed R, thereby giving users the freedom to choose stoves independently. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the relationship diagram between the stove firepower and the speed of the exhaust fan;

[0020] The realization of the functions and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0022] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0025] The invention discloses a smoke and stove linkage method, which is used for linkage between a range hood and a stove, wherein the range hood comprises a smoke exhaust fan and a main control module, the smoke exhaust fan has an operating power Pt and a preset speed R corresponding to the operating power Pt, and the stove has a combustion firepower value Ht, and the main control module adjusts the operating power of the smoke exhaust fan according to the predicted combustion firepower value of the stove, and the smoke and stove linkage method comprises:

[0026] The user starts the range hood and the stove, and makes the range hood run at power Pt and the stove burn at power Ht;

[0027] The control module detects the speed Rt of the exhaust fan in real time and compares Rt with the preset speed R of Pt:

[0028] If Rt>R, and Rt-R>ΔR1, and the operating gear of the smoke exhaust fan is not the highest gear, the control module increases the operating power of the smoke exhaust fan;

[0029] If Rt<R, and R-Rt>ΔR1, and the operating gear of the smoke exhaust fan is not the lowest gear, the control module reduces the operating power of the smoke exhaust fan;

[0030] If / R-Rt / ≤ΔR1, the control module operates the smoke exhaust fan at the existing power.

[0031] See also Figure 1In the kitchen environment, the most direct influencing factor of the range hood's air temperature is the firepower of the stove. When the stove is working, the greater the firepower of the stove, the higher the temperature of the oil fume, and the air density is inversely proportional to the air temperature. The higher the air temperature, the lower the air density. When the power of the range hood is fixed, the fan speed is inversely proportional to the air density. The lower the air density, the higher the fan speed. The range hood has multiple gears, such as low, medium, high and stir-fry. When the user starts the range hood and runs it at any of the low, medium, high and stir-fry gears, the power of the range hood remains constant, and the change in the firepower of the stove affects the temperature of the oil fume, the temperature of the oil fume affects the density of the oil fume, and the density of the oil fume affects the speed of the exhaust fan. That is to say, when the power of the range hood is constant, if the actual speed Rt of the range hood is less than the preset speed R, it means that the density of the oil fume is small, and the firepower gear of the stove is relatively small. When the actual speed Rt of the range hood is greater than the preset speed R, it means that the density of the oil fume is large, and the firepower gear of the stove is relatively large. The large firepower gear corresponds to the high or stir-fry gear of the range hood, and the small firepower gear corresponds to the low or medium gear of the range hood. Therefore, when Rt>R, the main control module determines that the stove is in a high firepower state, and when Rt-R≥ΔR1, the main control module determines that the current operating power of the smoke exhaust fan does not match the combustion firepower value of the stove. The main control module will increase the operating power of the smoke exhaust fan of the range hood to make the operating power of the smoke exhaust fan match the combustion firepower value of the stove.

[0032] Similarly, when the stove burns at a low firepower value, the temperature of the oil smoke is relatively low, and the air density is inversely proportional to the air temperature. The lower the air temperature, the greater the air density. When the range hood power is fixed, the fan speed is inversely proportional to the air density. The greater the air density, the lower the fan speed. When the user starts the range hood and runs it at one of the mid-range, high-range and stir-fry power levels, the power of the range hood remains constant. Therefore, when Rt<R, the main control module determines that the stove is in a low-fire state, and when R-Rt≥ΔR1, the main control module determines that the current operating power of the exhaust fan does not match the stove's combustion firepower value. The main control module will reduce the operating power of the exhaust fan of the range hood to match the exhaust fan's combustion firepower value.

[0033] It should be made clear that the so-called constant power means that when the range hood is running at a specific gear, the power of the range hood is fixed, and the air concentration only affects the speed of the range hood. Therefore, under the premise of constant power, the main control module monitors the actual speed Rt of the exhaust fan, and compares the actual speed Rt of the exhaust fan with the preset speed R, and determines whether the gear of the range hood matches the fire gear of the stove.

[0034] With the smoke and stove linkage method of the present invention, the range hood and the stove do not need to be a set of products of the same brand, and the range hood and the stove do not need to interact with each other through any means such as communication line connection, wireless communication, infrared, radio frequency, Bluetooth, wifi, etc. The main control module of the range hood compares the actual Rt of the smoke exhaust fan at the current gear and the preset speed R, and can judge whether the current operating unit of the range hood matches the current firepower of the stove based on the relationship between the two, and can judge whether the operating gear of the range hood needs to be increased or decreased based on the relationship between the actual speed Rt of the smoke exhaust fan at the current gear and the preset speed R, thereby giving users the freedom to choose stoves independently.

[0035] In the smoke stove linkage method of the present invention, if Rt<R, and R-Rt≥ΔR2, the control module increases the operating power of the smoke exhaust fan, and ΔR2 is greater than ΔR1.

[0036] Under normal circumstances, when the stove firepower is high, the air temperature is high and the air density is low, and when the stove firepower is low, the air temperature is low and the air density is high. However, during the cooking process, the oil smoke generated when the user opens the pot lid and closes the pot lid is different. When the user covers the pot lid for cooking, the oil smoke generated is small, and the stove firepower value can be used to correspond to the situation of high air temperature and low air density. However, when the stove is running at a high firepower value, if the pot is cooked from the pot lid to the pot lid, the oil smoke is relatively large at the moment the pot lid is opened. The effect of the oil smoke on the air density exceeds the effect of the stove firepower value on the air density. At this time, the air density is increased. When the exhaust fan of the range hood runs at the current power, its real-time speed Rt will be significantly less than the preset speed R. At this time, the main control module cannot reduce the operating power of the range hood, but needs to increase the operating power of the exhaust fan so that the exhaust fan can time to exhaust the large amount of oil smoke generated by opening the pot lid. Therefore, when Rt<R and R-Rt≥ΔR2, the actual speed Rt of the smoke exhaust fan is much smaller than the set speed R, indicating that a large amount of oil smoke is generated. Therefore, at this time, the main control module needs to increase the working gear of the range hood. By increasing the operating gear of the range hood, the operating power of the smoke exhaust fan can be increased, so that the smoke exhaust fan can quickly suck and discharge the oil smoke to ensure the purification effect of the range hood.

[0037] The smoke and stove interaction method of the present invention, under different gears of the range hood, the set speed R value of the smoke exhaust fan is when no oil smoke is generated, when the range hood is started, the speed of the smoke exhaust fan, in the process of the smoke and stove linkage, the stove is working, the stove will definitely heat the air to make the air density smaller and thinner, but when the stove is working, the user is cooking, and when the user is cooking, oil smoke will be generated, so the density of the air mixed with oil smoke and water vapor is greater than the density of pure air, when the operating gear of the range hood and the fire gear of the stove are adapted, the actual speed Rt of the smoke exhaust fan will still be less than the preset speed R, and when / Rt-R / ≤ΔR1, the main control module of the range hood determines that the operating gear of the range hood and the operating gear of the stove are adapted. When the operating gear of the range hood is lower than the fire gear of the stove, the range hood increases the speed by increasing the gear and increasing the operating power; when the operating gear of the range hood is higher than the fire gear of the stove, the range hood increases the speed by reducing the gear and reducing the operating power. However, when the time speed Rt of the smoke exhaust fan is much different from the preset speed R, for example, R-Rt≥ΔR2, it means that the air density is too high at this time. It can be judged as the stage where a large amount of oil smoke is generated. Therefore, it is necessary to increase the gear of the range hood to deal with this situation.

[0038] The smoke stove linkage method of the present invention is that the range hood has four gears of low, medium, high and stir-frying; the smoke exhaust fan has four operating powers P1, P2, P3 and P4 corresponding to the four gears of low, medium, high and stir-frying; the preset speed R of the smoke exhaust fan includes R1, R2, R3 and R4, P1, P2, P3 and P4 correspond to R1, R2, R3 and R4 one by one, wherein P1<P2<P3<P4, R1<R2<R3<R4.

[0039] When the range hood and the stove are not matching products, the range hood cannot communicate with the stove when the stove adjusts its firepower. When the user is cooking, the range hood and the stove are turned on separately. At this time, whether the operating power of the exhaust fan of the range hood matches the firepower value of the stove can only be determined by comparing the speed R of the exhaust fan detected in real time by the control module with the preset speed R. When the range hood and the stove are working, if the control module of the range hood detects that Rt>R, and Rt-R≥ΔR1, if the operating power of the exhaust fan of the range hood is not the maximum power, the control module increases the operating power of the exhaust fan by one level according to the current operating power of the range hood, and continues to check. Measure Rt and compare the value of Rt-R at the same time. If / R-Rt / <ΔR1, the control module makes the smoke exhaust fan run at the power after the first power increase. Similarly, if the control module of the range hood detects that Rt<R, and R-Rt≥ΔR1, at this time if the operating power of the smoke exhaust fan of the range hood is not the minimum power, the control module will reduce the operating power of the range hood by one level according to the current operating power of the range hood, and continue to detect Rt, and at the same time compare the detected speed Rt of the smoke exhaust fan with the preset speed R of the smoke exhaust fan. If / R-Rt / <ΔR1, the control module makes the smoke exhaust fan run at the power after the first power increase.

[0040] The low, medium, high and stir-fry gears of the range hood all correspond to an operating power and a preset speed of the smoke exhaust fan. After the main control module learns the current gear of the range hood, the current power preset speed R of the smoke exhaust fan is fixed. By comparing the actual speed Rt of the smoke exhaust fan obtained with the corresponding R, it can be decided to increase or decrease the gear of the range hood and make corresponding changes in the operating power of the smoke exhaust fan.

[0041] The smoke stove linkage method of the present invention, the fire power value Ht of the stove combustion includes low fire H1, medium fire H2 and high fire H3, and the method of the main control module predicting the size of the fire power value of the stove combustion is: if Pt = P1, and / R1-Rt / < ΔR1, the main control module determines that the stove is running at low fire H1, and the smoke exhaust fan is kept running at power P1; if R1>R, and R1-R> ΔR1, the main control module determines that the stove is running at medium fire H2, and the main control module makes the smoke exhaust fan run at high fire H2. The stove is running at power P2; if Pt=P2, and / R2-Rt / <ΔR1, the main control module determines that the stove is running at medium fire H2, and makes the smoke exhaust fan maintain power P2 operation; if R2>R, and R2-R>ΔR1, the main control module determines that the stove is running at high fire H3, and the main control module makes the smoke exhaust fan run at power P3; if the main control module determines that the stove is running at high fire H3, at this time Rt>R, and Rt-R>ΔR1, the main control module makes the smoke exhaust fan run at power P4.

[0042] In theory, each fire level of the stove corresponds to an operating level of the range hood, which can save energy to the greatest extent. However, in actual application, since the main control module of the range hood can determine whether the current operating power of the exhaust fan meets the purification effect of the range hood based on the difference between the actual speed Rt of the exhaust fan and the preset speed R, it is not particularly limited to the one-to-one correspondence between the fire level of the stove and the operating level of the range hood and the operating power of the exhaust fan. The final control result of the main control module satisfies / R-Rt / ≤ΔR1.

[0043] In the smoke and stove linkage method of the present invention, the firepower value Ht of the stove combustion also includes turning off the fire H0. If Pt=P1, Rt<R1, and R1-Rt<ΔR3, the main control module determines that the stove is turned off, wherein ΔR3<ΔR1.

[0044] When the smoke exhaust fan is running at the minimum power P1, the main control module detects that the real-time speed of the smoke exhaust fan is less than the preset speed R1, and R1-Rt<ΔR3, the main control module of the range hood determines that the stove is turned off. At this time, because the stove is turned off, the air temperature decreases and gradually approaches the ambient temperature of the use space. The actual speed detected by the main control module is greater than the preset speed, but the speed difference ΔR3 between the measured speed and the preset speed is less than the speed difference when the stove is turned on.

[0045] In the smoke and stove linkage method of the present invention, when the main control module determines that the stove is turned off, the main control module causes the smoke exhaust fan to continue to run for a time T, and then stops the smoke exhaust fan. If Pt=P1, Rt<R1, and R1-Rt<ΔR3, the main control module determines that the stove is turned off. After the stove is turned off, the pot does not immediately stop producing oil smoke. When the main control module of the range hood determines that the stove is in the off state, in order to clean up the oil smoke that continues to be emitted from the pot, the main control module of the range hood delays the shutdown of the smoke exhaust fan for a period of time T. After the smoke exhaust fan continues to run for a time T, it automatically enters the shutdown mode. In this embodiment, the main control mode of the range hood sets the delayed shutdown time. After the stove is turned off, the smoke exhaust fan continues to run for a time T and then enters the shutdown mode.

[0046] In the smoke and stove linkage method of the present invention, when the main control module determines that the stove is in the off state and the range hood enters the delayed off state, the user can switch the range hood to the off state at any time through the on / off button of the range hood. If Pt=P1, Rt<R1, and R1-Rt<ΔR3, the main control module determines that the stove is off. After the stove is turned off, the main control module of the range hood makes the range hood enter the delayed off mode. If the user chooses to turn off the stove, the range hood can be turned off. The user can switch the range hood to the off mode by himself through the on / off button of the range hood, which can meet the user's demand for autonomous control of the range hood. When the user is boiling water, the generation of water vapor during the boiling process will not pollute the environment. Therefore, in this case, after the stove is turned off, the user can switch the range hood from the delayed off mode to the off mode through the on / off button on the range hood to save energy.

[0047] In some other embodiments, the range hood has an APP, and the user can set whether to delay shutdown or not and the delay shutdown time in the APP, giving the user more freedom to customize.

[0048] In another embodiment of the smoke and stove linkage method, if Pt=P1, Rt<R1, and R1-Rt<ΔR3, the main control module determines that the stove is turned off. When the main control module determines that the stove is turned off, the main control module continues to detect the speed Rt of the smoke exhaust fan in real time. If R-Rt<ΔR4, the main control module stops the smoke exhaust fan, wherein ΔR4<ΔR3. After the stove is turned off, the pot will not stop producing oil smoke immediately. In other embodiments, when the main control module of the range hood determines that the stove is turned off, the main control module of the range hood will continue to run the smoke exhaust fan of the range hood to absorb the oil smoke that continues to be emitted from the pot. The main control module of the range hood continues to detect the actual speed of the smoke exhaust fan. When the measured speed Rt is infinitely close to the preset speed, it means that the oil smoke content in the air is very low, and then the main control module turns off the range hood. In this embodiment, the main control module determines the oil fume content in the air of the use space by detecting the real-time rotation speed Rt of the smoke exhaust fan. When the oil fume content in the air of the use space is very low, the real-time rotation speed Rt of the smoke exhaust fan will be very close to the preset rotation speed R of the smoke exhaust fan in the current operating gear; therefore, if R-Rt<ΔR4, the main control module stops the operation of the smoke exhaust fan, wherein ΔR4<ΔR3.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for linkage between a hood and a stove, used for linkage between a hood and a stove, characterized in that: The range hood has a smoke exhaust fan and a main control module. The smoke exhaust fan has an operating power Pt and a preset speed R corresponding to the operating power Pt. The stove has a combustion power value Ht. The main control module adjusts the operating power of the smoke exhaust fan according to the predicted combustion power value of the stove. The smoke and stove linkage method is: The user starts the range hood and the stove, and makes the range hood run at power Pt and the stove burn at power Ht; The control module detects the speed Rt of the exhaust fan in real time and compares Rt with the preset speed R of Pt: If Rt>R, and Rt-R>ΔR1, and the operating gear of the smoke exhaust fan is not the highest gear, the control module increases the operating power of the smoke exhaust fan; If Rt<R, and R-Rt>ΔR1, and the operating gear of the smoke exhaust fan is not the lowest gear, the control module reduces the operating power of the smoke exhaust fan; If / R-Rt / ≤ΔR1, the control module operates the smoke exhaust fan at the existing power.

2. The smoke stove linkage method according to claim 1, characterized in that: If Rt<R, and R-Rt≥ΔR2, the control module increases the operating power of the smoke exhaust fan, and ΔR2 is greater than ΔR1.

3. The smoke stove linkage method according to claim 2, characterized in that: The range hood has four gears: low, medium, high and stir-fry. The smoke exhaust fan has four operating powers P1, P2, P3 and P4 corresponding to the four gears: low, medium, high and stir-fry. The preset speed R of the smoke exhaust fan includes R1, R2, R3 and R4. P1, P2, P3 and P4 correspond to R1, R2, R3 and R4 one by one, among which P1<P2<P3<P4, R1<R2<R3<R4.

4. The smoke stove linkage method according to claim 3, characterized in that: The firepower value Ht of the stove includes low fire H1, medium fire H2 and high fire H3. The method for the main control module to predict the firepower value of the stove is as follows: if Pt=P1, and / R1-Rt / <ΔR1, the main control module determines that the stove is running at low fire H1, and keeps the exhaust fan running at power P1; if R1>R, and R1-R>ΔR1, the main control module determines that the stove is running at medium fire H2, and the main control module keeps the exhaust fan running at power P2 ; If Pt=P2, and / R2-Rt / <ΔR1, the main control module determines that the stove is running at medium fire H2, and makes the smoke exhaust fan maintain power P2 operation; if R2>R, and R2-R>ΔR1, the main control module determines that the stove is running at high fire H3, and the main control module makes the smoke exhaust fan run at power P3; if the main control module determines that the stove is running at high fire H3, at this time Rt>R, and Rt-R>ΔR1, the main control module makes the smoke exhaust fan run at power P4.

5. The smoke stove linkage method according to claim 3, characterized in that: The fire power value Ht of the stove combustion also includes turning off the fire H0. If Pt=P1, Rt<R1, and R1-Rt<ΔR3, the main control module determines that the stove is turned off, wherein ΔR3<ΔR1.

6. The smoke stove linkage method according to claim 5, characterized in that: When the main control module determines that the stove is turned off, the main control module allows the smoke exhaust fan to continue running for a time T, and then stops the smoke exhaust fan.

7. The smoke stove linkage method according to claim 6, characterized in that: When the main control module determines that the stove is in the off state and the range hood enters the delayed off state, the user can switch the range hood to the off state at any time by pressing the on / off button of the range hood.

8. The smoke stove linkage method according to claim 5, characterized in that: When the main control module determines that the stove is turned off, the main control module continues to detect the speed Rt of the smoke exhaust fan in real time. If R-Rt<ΔR4, the main control module stops the smoke exhaust fan, wherein ΔR4<ΔR3.

Images