A control method of a range hood

Abstract

The application discloses a control method of a smoke machine, which comprises the following steps: S0, starting the smoke machine; S1, starting the smoke exhaust fan and operating at a power P, and starting the air curtain assembly and operating at a power p; S2, detecting the state of the pot by the height detection module: S21, not being placed on the stove; S22, being placed on the stove and being covered with a pot cover; S23, being placed on the stove and not being covered with a pot cover; S24, the pot cover being in the process of being covered on the pot to being moved away from the pot; S3, sending the timing information of the timing module to the control module by the wireless communication module of the stove through the wireless communication module of the smoke machine; S31, the timing duration T of the timing module being 0; S32, the timing duration T of the timing module being greater than 45s; if S24 and S32, adjusting the power of the air curtain assembly to pm according to the existing power of the air curtain assembly by the control module, and after entering S23 from S24, adjusting the power of the smoke exhaust fan to Pm according to the smoke concentration detected by the smoke detection module by the control module.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of range hood, in particular, to a control method of range hood. BACKGROUND

[0002] When cooking, the smoke concentration is the largest at the moment when the pot cover is opened, and the process of opening the pot cover is also the process when the oil fume is easy to escape. At this time, the power of the exhaust fan of the range hood needs to be improved to increase the suction capacity of the range hood to the smoke, so that the oil fume generated at the moment when the pot cover is opened can be quickly exhausted, which can effectively avoid the escape of oil fume. However, during the cooking process, the user cannot improve the gear of the exhaust fan of the range hood before opening the pot cover each time, so it is easy to cause the escape of oil fume during the cooking process, pollute the air of the cooking environment and affect the health of the user. SUMMARY

[0003] The present application aims to provide a control method of range hood to solve the problems in the background.

[0004] The present application is implemented as follows: a control method of range hood, the range hood has a control module, a height detection module, a smoke detection module, a range hood wireless communication module, an exhaust fan and a wind curtain assembly, the cooktop has a timing module, a switch valve and a cooktop wireless communication module, the timing information of the timing module is transmitted to the control module through the cooktop wireless communication module and the range hood wireless communication module, the control module controls the switch valve through the range hood wireless communication module and the cooktop wireless communication module, the switch valve is opened, the timing module starts timing, the switch valve is closed, the timing module is cleared, and the control method comprises the following steps:

[0005] S0: starting the range hood;

[0006] S1: starting the exhaust fan and operating at a power P; starting the wind curtain assembly and operating at a power p;

[0007] S2: the height detection module detects the state of the pot: S21: not placed on the cooktop; S22: placed on the cooktop and covered with a pot cover; S23: placed on the cooktop and not covered with a pot cover; S24: the pot cover is in the process of being covered on the pot to being moved away from the pot;

[0008] S3: the cooktop wireless communication module sends the timing information of the timing module to the control module through the range hood wireless communication module: S31: the timing module timing duration T=0; S32: the timing module timing duration T>45S;

[0009] If S31, the exhaust fan and the wind curtain assembly remain operating at the existing power for a time t1, and if S31 still exists, the exhaust fan and the wind curtain assembly are turned off;

[0010] If S21 and the result outputted by S3 is not S31, the control module controls the switch valve to reduce the firepower of the stove, and the exhaust fan and the air curtain assembly wait for 10S<T≤45S, and if S21 still exists, the exhaust fan and the air curtain assembly are turned off, and the switch valve is closed;

[0011] If S22 and the result outputted by S3 is not S31, the exhaust fan and the air curtain assembly keep running at the existing power;

[0012] If S23 and the result outputted by S3 is not S31, the smoke detection module detects the smoke concentration, and adjusts the power of the exhaust fan to Pm according to the smoke concentration;

[0013] If S24 and S32, the control module adjusts the power of the air curtain assembly to pm according to the existing power of the air curtain assembly, and after entering S23 from S24, the control module adjusts the power of the exhaust fan to Pm according to the smoke concentration detected by the smoke detection module.

[0014] Further, the method for detecting the state of the pot by the height detection module is that the height detection module judges the state of the pot based on the difference between the detected height Left_h and the installation height Left_h1 and the difference between the detected height Right_h and the installation height Right_h1:

[0015] S21: Left_h=Left_h1, △Left_h=0 and Right_h=Right_h1, △Right_h=0, then the pot is not placed on the stove;

[0016] S22: if Left_h<Left_h1, △H1<△Left_h<△H2, and Right_h<Right_h1, △H1<△Right_h<△H2, then the pot is placed on the stove and the pot cover is covered with the pot cover;

[0017] S23: if Left_h<Left_h1, 0<△Left_h<△H1, and / or if Right_h<Right_h1, 0<△Right_h<△H1, then the pot is placed on the stove and the pot cover is not covered with the pot cover;

[0018] If S24: if Left_h<Left_h1, △Left_h>△H2, and / or Right_h<Right_h1, △Right_h>△H2, the pot cover of the pot placed on the stove is in the process of being covered on the pot to being moved away from the pot;

[0019] Wherein, Left_h1 and Right_h1 are the vertical heights from the left stove and the right stove to the smoke machine respectively stored in the control module after the smoke machine is installed qualifiedly, and 0<△H1<△H2.

[0020] Further, in step S3, the stove wireless communication module sends the timing information of the timing module to the control module through the smoke exhaust fan wireless communication module, and the sending further comprises: S33: the timing module counts for a time period of 0 < T ≤ 10 seconds, and if S33, the smoke exhaust fan and the air curtain module keep running at the existing power.

[0021] Further, if S24 and S32, the method for the control module to adjust the power of the air curtain assembly to pm according to the existing power of the air curtain assembly is:

[0022] If p < pmax, the control module increases the power of the air curtain assembly to pmax;

[0023] If p = pmax, the control module keeps the air curtain assembly running at the existing power.

[0024] Further, after entering S23 from S24, the method for the control module to adjust the power of the smoke exhaust fan to Pm according to the smoke concentration detected by the smoke detection module is:

[0025] If the smoke concentration C detected by the smoke detection module is ≤ C1, the smoke exhaust fan keeps running at the existing power P;

[0026] If the smoke concentration C detected by the smoke detection module is C1 < C ≤ C2, and P = P1, the control module adjusts the power of the smoke exhaust fan to P2;

[0027] If the smoke concentration C detected by the smoke detection module is C1 < C ≤ C2, and P ≥ P2, the control module keeps the smoke exhaust fan running at the existing power;

[0028] If the smoke concentration C detected by the smoke detection module is > C2, and P < Pmax, the control module adjusts the power of the smoke exhaust fan to Pmax;

[0029] If the smoke concentration C detected by the smoke detection module is > C2, and P = Pmax, the control module keeps the smoke exhaust fan running at the existing power P; P1 < P2 < Pmax.

[0030] Further, if the smoke concentration C detected by the smoke detection module is ≤ C1, the smoke exhaust fan runs at the power P:

[0031] When P = P1, the control module keeps the smoke exhaust fan running at the existing power P;

[0032] When P > P1, the control module keeps the smoke exhaust fan running at the existing power for a time period of t2, and then reduces the power of the smoke exhaust fan to P1.

[0033] Further, after entering S23 from S24, the control module adjusts the power of the smoke exhaust fan to Pm according to the smoke concentration detected by the smoke detection module and runs for a time t3, then the smoke detection module detects the smoke concentration in real time and adjusts the power of the smoke exhaust fan and the air curtain assembly according to the smoke concentration.

[0034] Further, during the cooking process, the control module records the pm and Pm values after entering S23 from S24 for the first time, and if the height detection module detects again entering S24 from S22 in the same cooking cycle, the power of the air curtain assembly is directly adjusted to pm, and the power of the smoke exhaust fan is adjusted to Pm.

[0035] Further, a temperature detection module is further included, if the result output by S3 is not S31, the temperature value R detected by the temperature detection module is greater than Rmax, the control switch valve is closed, and the smoke exhaust fan and the air curtain assembly are closed after the smoke concentration C detected by the smoke detection module is less than or equal to C1.

[0036] Further, a PM2.5 detection module is further included, in step S0, the range hood is started, and the PM2.5 detection module starts to run, when the detection result of the PM2.5 detection module exceeds the standard, the control module increases the power of the air curtain assembly to pmax and the power of the smoke exhaust fan to Pmax until the detection result of the PM2.5 detection module reaches the standard, and then the control module adjusts the running power of the air curtain assembly and the smoke exhaust fan according to the state of the pot detected by the height detection module and the smoke concentration detected by the smoke detection module.

[0037] Compared with the prior art, the control method of the range hood provided by the application adjusts and controls the running power of the smoke exhaust fan and the air curtain assembly automatically according to the detection results and the set control program by detecting the state of the pot, the smoke concentration and the state of the cooktop. Not only can the range hood be turned off when the cooktop is not turned on and the pot is cleaned for too long, but also can save energy, and can realize delayed shutdown and quickly exhaust the oil fume generated in the moment when the pot cover is opened, which can effectively prevent the oil fume from escaping due to the opening of the pot cover, improve the user experience and protect the health of the user. Other advantages of the application are described in the subsequent specification. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a block diagram of an electric control structure of a range hood and a cooktop described in an embodiment of the application;

[0039] Figure 2 is a block diagram of another electric control structure of a range hood and a cooktop described in an embodiment of the application;

[0040] Figure 3 is a flowchart of steps S2 and S3 in the control method of the range hood described in an embodiment of the application;

[0041] Figure 4 For the left side furnace head pot status judgment by the detection result of the left side height detection module in the embodiment of the present application, the corresponding graph of the detection result and the judged pot status. The right side height detection module is the same as the left side for judging the right side furnace head pot status. DETAILED DESCRIPTION

[0042] In the following, several embodiments of the present application will be described with reference to the drawings. Many practical details will be described in the following description for the purpose of making the present application clear. However, it should be understood that these practical details are not intended to limit the present application. That is, in some embodiments of the present application, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0043] It should be noted that all directional indications, such as upper, lower, left, right, front, back, etc., are only used for explaining the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and does not mean to specially indicate the order or sequence, nor to limit the present application. It is merely to distinguish the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person skilled in the art. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor is it within the protection scope required by the present application.

[0045] In order to further understand the content, characteristics and effects of the present application, the following embodiments are exemplified and described in detail as follows in conjunction with the drawings:

[0046] Embodiment 1

[0047] The present embodiment provides a range hood and a cooktop, such as Figure 1As shown, the smoke machine has a control module, a height detection module, a smoke detection module, a smoke machine wireless communication module, a smoke exhaust fan and a air curtain assembly. The height detection module, the smoke detection module, the smoke machine wireless communication module, the smoke exhaust fan and the air curtain assembly are electrically connected with the control module. The control module includes a smoke machine main control board and an MCU chip installed on the smoke machine main control board. The height detection module is provided with two left and right modules, which are aligned with two burner heads of the stove. The height detection module can use an ultrasonic ranging sensor. The smoke detection module can use a smoke sensor to detect the oil smoke concentration. The smoke exhaust fan is arranged in a smoke exhaust duct inside the smoke machine shell. The drive motor of the smoke exhaust fan is a variable frequency motor. The front end of the smoke machine shell is provided with a mounting cavity. A bottom wall of the mounting cavity is provided with an air curtain outlet. The air curtain assembly is arranged in the mounting cavity. The air curtain motor of the air curtain assembly uses a variable frequency motor. The smoke machine wireless communication module includes a Bluetooth chip. The stove has a stove wireless communication module, a switch valve and a timing module. The stove wireless communication module is a Bluetooth chip. The stove wireless communication module can communicate with the smoke machine wireless communication module through Bluetooth signals.

[0048] The height detection module is used to detect the state of the pot and send the state of the pot to the control module. The pot state detected by the height detection module has four conditions, which are S21, S22, S23 and S24. S21 indicates that the pot is not placed on the stove. S22 indicates that the pot is placed on the stove and covered with a pot cover. S23 indicates that the pot is placed on the stove and not covered with a pot cover. S24 indicates that the pot is placed on the stove and the pot cover is in the process of being covered on the pot to being moved away from the pot.

[0049] In some exemplary embodiments, the smoke machine wireless communication module includes a WiFi chip in addition to the Bluetooth chip. The WiFi chip can be used to communicate with the server and transmit some data of the smoke machine and the stove to the server. The smoke machine wireless communication module can be connected with the smoke machine control APP installed on the smart phone or the control terminal through Bluetooth signals or WiFi signals. The technical parameters of the smoke machine can be viewed through the smoke machine control APP. Some parameters can be set and modified through the smoke machine control APP.

[0050] In some exemplary embodiments, the stove also has a stove control module. The stove wireless communication module, the timing module and the switch valve are electrically connected with the stove control module. The control module of the smoke machine is connected with the stove control module through the smoke machine wireless communication module and the stove wireless communication module. When the stove has a stove control module, the timing module can also be a sub-function module of the stove control module.

[0051] Embodiment 2

[0052] The embodiment provides a control method of a range hood, which is used for controlling the exhaust fan and the air curtain assembly of the range hood provided in the embodiment 1, and also relates to the control of the on-off valve of the cooktop provided in the embodiment 1. The timing information of the timing module is transmitted to the control module of the range hood through the cooktop wireless communication module and the range hood wireless communication module, the control module controls the on-off valve through the range hood wireless communication module and the cooktop wireless communication module, the on-off valve is opened, the timing module starts timing, the on-off valve is closed, and the timing module clears the timing. The control method of the range hood comprises the following steps.

[0053] S0: starting the range hood.

[0054] S1: the exhaust fan is started and runs at a power P, and the air curtain assembly is started and runs at a power p.

[0055] S2: the height detection module detects the state of the pot. The height detection module judges the state of the pot based on the difference between the detected height Left_h and the installation height Left_h1 and the difference between the detected height Right_h and the installation height Right_h1. The state of the pot has four cases, which are S21, S22, S23 and S24, S21 indicates that the pot is not placed on the cooktop, S22 indicates that the pot is placed on the cooktop and covered with a pot cover, S23 indicates that the pot is placed on the cooktop and not covered with a pot cover, and S24 indicates that the pot is placed on the cooktop and the pot cover is in the process of being covered on the pot to being moved away from the pot.

[0056] As shown in Figure 4 , the specific method for judging the state of the pot is as follows:

[0057] S21: if Left_h=Left_h1 and △Left_h=0, it indicates that the left burner of the cooktop is not placed with a pot; if Right_h=Right_h1 and △Right_h=0, it indicates that the right burner of the cooktop is not placed with a pot; if Left_h=Left_h1, △Left_h=0 and Right_h=Right_h1, △Right_h=0, it indicates that the two burners of the cooktop are not placed with a pot.

[0058] S22: if Left_h<Left_h1, △H1<△Left_h<△H2, it indicates that the left burner of the cooktop is placed with a pot and the pot is covered with a pot cover; if Right_h<Right_h1, △H1<△Right_h<△H2, it indicates that the right burner of the cooktop is placed with a pot and the pot is covered with a pot cover; if Left_h<Left_h1, △H1<△Left_h<△H2 and Right_h<Right_h1, △H1<△Right_h<△H2, it indicates that the two burners of the cooktop are placed with a pot and the pot is covered with a pot cover, wherein 0<△H1<△H2.

[0059] S23: If Left_h < Left_h1, 0 < △Left_h < △H1, it means that a pot is placed on the left burner of the stove and the pot is not covered with a lid; if Right_h < Right_h1, 0 < △Right_h < △H1, it means that a pot is placed on the right burner of the stove and the pot is not covered with a lid; if Left_h < Left_h1, 0 < △Left_h < △H1, and Right_h < Right_h1, 0 < △Right_h < △H1, it means that a pot is placed on both burners of the stove and the pot is not covered with a lid.

[0060] S24: If Left_h < Left_h1, △Left_h > △H2, it means that a pot is placed on the left burner of the stove and the pot lid is in the process of being removed from the pot; if Right_h < Right_h1, △Right_h > △H2, it means that a pot is placed on the right burner of the stove and the pot lid is in the process of being removed from the pot; if Left_h < Left_h1, △Left_h > △H2, and Right_h < Right_h1, △Right_h > △H2, it means that a pot is placed on both burners of the stove and the pot lid is in the process of being removed from the pot.

[0061] In the above method for judging the status of cookware, Left_h1 and Right_h1 are the vertical heights of the left and right furnaces to the range hood stored in the control module after the range hood is installed correctly, where 0 < △H1 < △H2.

[0062] S3: The cooktop wireless communication module sends the timing information from the timing module to the control module via the range hood wireless communication module. The timing duration T of the timing module includes three cases, namely S31, S32, and S33. Specifically, S31: Timing duration T = 0; S32: Timing duration T > 45 seconds; S33: Timing duration 0 < T ≤ 45 seconds. The process for each case in step S3 is as follows: Figure 3 As shown.

[0063] If S31 is reached, the exhaust fan and air curtain assembly maintain their current power operation for a time t1. If S31 is still in effect, the exhaust fan and air curtain assembly will shut down. Usage scenarios include: the exhaust fan and air curtain assembly shutting down when the stove is not being used, saving energy. After the stove is turned off, the exhaust fan and air curtain assembly delay shutting down, further removing cooking fumes from the cooking environment.

[0064] If S33, the exhaust fan and the air curtain module remain at the existing power. Typical use scenarios are: the initial heating process of the pot, no or little smoke is generated, or the initial opening of the stove, regardless of the state of the pot, the amount of smoke is small, at this time the exhaust fan power remains unchanged.

[0065] If not S31, and the pot state is S21, the control module controls the on-off valve to reduce the firepower of the stove, and the exhaust fan and the air curtain assembly wait for 10S < T < 45S, and if it is still S21, the exhaust fan and the air curtain assembly are turned off, and the on-off valve is closed. Typical use scenarios are: during the cooking process, the pot is removed for cleaning, and the cleaning time is relatively long, and the machine is turned off to save energy.

[0066] If not S31, and the pot state is S22, the exhaust fan and the air curtain assembly remain at the existing power during the heating process with the pot cover on the pot cover.

[0067] If not S31, and the pot state is S23, the smoke detection module detects the smoke concentration, and adjusts the power of the exhaust fan to Pm according to the smoke concentration.

[0068] If S32, and the pot state is S24, the control module adjusts the power of the air curtain assembly to pm according to the existing power of the air curtain assembly. After entering S23 from S24, the control module adjusts the power of the exhaust fan to Pm according to the smoke concentration detected by the smoke detection module.

[0069] The method for the control module to adjust the power of the air curtain assembly to pm according to the existing power of the air curtain assembly is:

[0070] If p < pmax, the control module increases the power of the air curtain assembly to pmax. When the pot state is S24, a large amount of oil smoke will be generated at the moment of opening the pot cover. In order to reduce the escape of oil smoke, the power of the air curtain assembly is increased to the maximum, that is, to pmax. At this time, if p = pmax, the control module keeps the air curtain assembly running at the existing power, that is, keeps running at the maximum power.

[0071] After entering S23 from S24, the method for the control module to adjust the power of the exhaust fan to Pm according to the smoke concentration detected by the smoke detection module is:

[0072] The method for the control module of the smoke machine to adjust the power of the exhaust fan to Pm according to the smoke concentration detected by the smoke detection module is:

[0073] If the smoke concentration C1 < C ≤ C2 detected by the smoke detection module and P = P1, the control module adjusts the power of the exhaust fan to P2. When the smoke concentration C < C1, the oil fume concentration is relatively small, and the exhaust fan can meet the suction of oil fume at a small power P1. When the smoke concentration C1 < C ≤ C2, P1 cannot timely suck the smoke, and the power of the exhaust fan needs to be increased to P2 to timely suck and exhaust the oil fume.

[0074] If the smoke concentration C1 < C ≤ C2 detected by the smoke detection module and P ≥ P2, the control module keeps the exhaust fan running at the existing power. When the smoke concentration is C1 < C ≤ C2, the exhaust fan can timely suck and exhaust the oil fume at the power P2. If the power P of the exhaust fan is greater than or equal to P2 at this oil fume concentration, the exhaust fan continues to run at the existing power. This state can be the state after the pot cover is opened and the smoke is stable. At the moment when the pot cover is opened, the smoke concentration increases the power of the exhaust fan to P ≥ P2. After the oil fume is stable and C1 < C ≤ C2, the exhaust fan continues to run at this power.

[0075] If the smoke concentration C > C2 detected by the smoke detection module and P < Pmax, the control module adjusts the power of the exhaust fan to Pmax. When the smoke concentration C > C2, the oil fume concentration is relatively large. If the running power P of the exhaust fan is less than Pmax, the control module adjusts the power of the exhaust fan to Pmax to timely suck and exhaust the oil fume, so as to ensure the air quality of the user's cooking environment.

[0076] If the smoke concentration C > C2 detected by the smoke detection module and P = Pmax, the control module keeps the exhaust fan running at the existing power P, that is, keeps running at the maximum power Pmax.

[0077] Different smoke concentrations correspond to different powers of the exhaust fan, which can effectively suck oil fume and avoid waste of the power of the exhaust fan.

[0078] If the smoke concentration C ≤ C1 detected by the smoke detection module, the exhaust fan keeps running at the existing power P:

[0079] When P = P1, the control module keeps the exhaust fan running at the existing power P. When the smoke concentration C ≤ C1, the oil fume concentration is relatively small, and the exhaust fan can effectively suck and exhaust the oil fume at P1. If P is too large, the power of the exhaust fan will be wasted.

[0080] When P>P1, the control module keeps the exhaust fan running at the existing power for a time t2, and then reduces the power of the exhaust fan to P1. At the moment when the pot cover is opened, the smoke concentration increases the power of the exhaust fan to P>P1. After the oil fume is stable and C≤C1, the exhaust fan continues to run at the power P for a time t2. After the smoke concentration is stable and C≤C1, the power of the exhaust fan is reduced to P1, which can avoid wasting the power of the exhaust fan.

[0081] After entering S23 from S24, the control module adjusts the power of the exhaust fan to Pm according to the smoke concentration detected by the smoke detection module, and runs for a time t3. The smoke detection module detects the oil fume concentration in real time, and adjusts the power of the exhaust fan and the air curtain assembly according to the oil fume concentration.

[0082] In some exemplary embodiments, during the cooking process, the control module records the pm and Pm values after entering S23 from S24 for the first time. If the height detection module detects again when entering S24 from S22 in the same cooking period, the power of the air curtain assembly is directly adjusted to pm, and the power of the exhaust fan is directly adjusted to Pm. The same cooking period refers to the process of cooking the same food material. Each time the pot cover is opened, the state of oil fume generation is similar. The last recorded power pm value of the air curtain assembly and the last recorded power Pm value of the exhaust fan can be directly used in the next operation. In this way, not only the control steps are simplified, but also the oil fume escape is prevented.

[0083] In some exemplary embodiments, as shown in Figure 2 The range hood also has a temperature detection module electrically connected to the control module. In step S3, if it is not S31, the temperature value R detected by the temperature detection module is greater than Rmax, which indicates that a dry burning accident may occur. At this time, the control module closes the switch valve of the stove to ensure safety. After the smoke concentration C detected by the smoke detection module is less than or equal to C1, the exhaust fan and the air curtain assembly are closed to remove the oil fume generated by dry burning.

[0084] In some exemplary embodiments, as shown in Figure 2 The range hood also has a PM2.5 detection module electrically connected to the control module. In step S0, the range hood is started, and the PM2.5 detection module starts to run. When the detection result of the PM2.5 detection module exceeds the standard, it indicates that the air pollution in the cooking environment is serious, which not only affects the health of the cooking personnel, but also causes the air in the cooking environment to carry oil fume, which affects the oil fume removal function of the range hood. At this time, the control module increases the power of the air curtain assembly to pmax and increases the power of the exhaust fan to Pmax until the detection result of the PM2.5 detection module reaches the standard. Then, the control module adjusts the running power of the air curtain assembly and the exhaust fan according to the state of the pot detected by the height detection module and the smoke concentration detected by the smoke detection module.

[0085] In summary, the control method of the smoke machine provided by the application can detect the state of the pot, the smoke concentration and the use state of the cooking appliance, and automatically control the operating power of the smoke exhaust fan and the air curtain assembly according to the detection results and the set control program. Not only can the cooking appliance be turned off without turning on the fire and the pot be turned off when the cleaning time is too long, but also the energy can be saved, the delayed shutdown can be realized, and the oil smoke generated at the moment of opening the pot cover can be quickly discharged at the moment of opening the pot cover, which can effectively prevent the oil smoke from escaping due to the opening of the pot cover, improve the user experience, and protect the health of the user.

[0086] The above is only a preferred embodiment of the application and is not intended to limit the application. Any modification, equivalent replacement or improvement made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A control method of a range hood, characterized by: The smoke machine has a control module, a height detection module, a smoke detection module, a smoke machine wireless communication module, a smoke exhaust fan and a air curtain assembly. The cooking appliance has a timing module, a switch valve and a cooking appliance wireless communication module. The timing information of the timing module is transmitted to the control module through the cooking appliance wireless communication module and the smoke machine wireless communication module. The control module controls the switch valve through the smoke machine wireless communication module and the cooking appliance wireless communication module. When the switch valve is opened, the timing module starts timing. When the switch valve is closed, the timing module resets the timing. The control method comprises the following steps: S0: starting the smoke machine; S1: starting the smoke exhaust fan and operating at a power P; starting the air curtain assembly and operating at a power p; S2: the height detection module detects the state of the pot: S21: not placed on the cooking appliance; S22: placed on the cooking appliance and covered with a pot cover; S23: placed on the cooking appliance and not covered with a pot cover; S24: the pot cover is in the process of being covered on the pot to being moved away from the pot; S3: the cooking appliance wireless communication module sends the timing information of the timing module to the control module through the smoke machine wireless communication module: S31: the timing module timing duration T=0; S32: the timing module timing duration T>45S; If S31, the smoke exhaust fan and the air curtain assembly remain operating at the existing power for a time t1. If S31 still exists, the smoke exhaust fan and the air curtain assembly are turned off. If S21 and the output result of S3 is not S31, the control module controls the switch valve to reduce the firepower of the cooking appliance. The smoke exhaust fan and the air curtain assembly wait for 10S<T≤45S. If S21 still exists, the smoke exhaust fan and the air curtain assembly are turned off, and the switch valve is closed. If S22 and the output result of S3 is not S31, the smoke exhaust fan and the air curtain assembly remain operating at the existing power. If S23 and the output result of S3 is not S31, the smoke detection module detects the smoke concentration, and adjusts the power of the smoke exhaust fan to Pm according to the smoke concentration. If S24 and S32, the control module adjusts the power of the air curtain assembly to pm according to the existing power of the air curtain assembly. After entering S23 from S24, the control module adjusts the power of the smoke exhaust fan to Pm according to the smoke concentration detected by the smoke detection module.

2. The control method of the range hood according to claim 1, characterized by, The method for detecting the state of the pot by the height detection module is that the height detection module judges the state of the pot based on the difference between the detected height Left_h and the installation height Left_h1 and Right_h1 and the installation height Right_h1: S21: Left_h=Left_h1, △Left_h=0 and Right_h=Right_h1, △Right_h=0, then the pot is not placed on the cooking appliance; S22: if Left_h<Left_h1, △H1<△Left_h<△H2, and Right_h<Right_h1, △H1<△Right_h<△H2, then the cooking appliance is placed with a pot and the pot is covered with a pot cover; S23: If Left_h < Left_h1, 0 < △Left_h < △H1, and / or if Right_h < Right_h1, 0 < △Right_h < △H1, then the cookware is placed on the stove and the cookware is not covered by the pot cover; If S24: If Left_h < Left_h1, △Left_h > △H2, and / or Right_h < Right_h1, △Right_h > △H2, the pot cover of the cookware placed on the stove is in the process of being covered on the cookware to being moved away from the cookware; Wherein, Left_h1 and Right_h1 are the vertical heights from the left stove and the right stove to the smoke machine respectively stored in the control module after the smoke machine is installed, 0 < △H1 < △H2.

3. The control method of the range hood according to claim 1, characterized by, In step S3, the stove wireless communication module sends the timing information of the timing module to the control module through the smoke machine wireless communication module, and the method further comprises: S33: the timing module counts for a time length of 0 < T ≤ 10S, and if S33, the exhaust fan and the air curtain module remain to operate at the existing power.

4. The control method of the range hood according to claim 1, characterized by, If S24 and S32, the method for the control module to adjust the power of the air curtain assembly to pm according to the existing power of the air curtain assembly is: If p < pmax, the control module increases the power of the air curtain assembly to pmax; If p = pmax, the control module makes the air curtain assembly remain to operate at the existing power.

5. The control method of the range hood according to claim 1, characterized by, After entering S23 from S24, the method for the control module to adjust the power of the exhaust fan to Pm according to the smoke concentration detected by the smoke detection module is: If the smoke concentration C detected by the smoke detection module is less than or equal to C1, the exhaust fan remains to operate at the existing power P; If the smoke concentration C detected by the smoke detection module is greater than C1 and less than or equal to C2, and P = P1, the control module adjusts the power of the exhaust fan to P2; If the smoke concentration C detected by the smoke detection module is greater than C1 and less than or equal to C2, and P ≥ P2, the control module makes the exhaust fan remain to operate at the existing power; If the smoke concentration C detected by the smoke detection module is greater than C2, and P < Pmax, the control module adjusts the power of the exhaust fan to Pmax; If the smoke concentration C detected by the smoke detection module is greater than C2, and P = Pmax, the control module makes the exhaust fan remain to operate at the existing power P; P1 < P2 < Pmax.

6. The control method of the range hood according to claim 5, characterized by, If the smoke concentration C detected by the smoke detection module is less than or equal to C1, the exhaust fan operates at the power P: When P = P1, the control module makes the exhaust fan remain to operate at the existing power P; When P > P1, the control module makes the exhaust fan remain to operate at the existing power for a time t2, and then reduces the power of the exhaust fan to P1.

7. The control method of the range hood according to claim 1, characterized by, After the control module adjusts the power of the exhaust fan to Pm according to the smoke concentration detected by the smoke detection module and operates for a time t3 after entering S23 from S24, the smoke detection module detects the oil fume concentration in real time, and adjusts the power of the exhaust fan and the air curtain assembly according to the oil fume concentration.

8. The control method of the range hood according to claim 1, characterized by, In the cooking process, the control module records the pm and Pm values after entering S23 for the first time by S24. In the same cooking cycle, if the height detection module detects again when entering S24 by S22, the power of the air curtain assembly is directly adjusted to pm, and the power of the exhaust fan is adjusted to Pm.

9. The control method of the range hood according to claim 1, characterized by, Also includes a temperature detection module, if the result output by S3 is not S31, the temperature value R detected by the temperature detection module is greater than Rmax, the control switch valve is closed, and after the smoke concentration C detected by the smoke detection module is less than or equal to C1, the exhaust fan and the air curtain assembly are closed.

10. The control method of the range hood according to claim 1, characterized by, Also includes a PM2.5 detection module, in step S0, the range hood is started, and the PM2.5 detection module starts to run. When the detection result of the PM2.5 detection module exceeds the standard, the control module increases the power of the air curtain assembly to pmax and the power of the exhaust fan to Pmax until the detection result of the PM2.5 detection module reaches the standard. Then, the control module adjusts the running power of the air curtain assembly and the exhaust fan according to the pot state detected by the height detection module and the smoke concentration detected by the smoke detection module.

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