A control method of a range hood having a purification function

Abstract

The application discloses a control method of a smoke machine with a purification function, the smoke machine comprising a main control module, a smoke exhaust fan, a wind curtain module, a rotating module and a negative ion module, the smoke exhaust fan, the wind curtain module, the rotating module and the negative ion module being connected with the main control module, the rotating module being used for adjusting the air outlet direction of the wind curtain module, the air outlet direction of the wind curtain module determining the flow direction of the negative ions generated by the negative ion module, and the control method of the smoke machine being that: when the smoke exhaust fan is running, the wind curtain module runs at a power P1, and the rotating module and the negative ion module do not run; when the smoke machine is turned off and the negative ion module is started, the wind curtain module runs at a power P2, and the rotating module runs to control the air outlet direction of the wind curtain module, wherein P1P2; compared with the prior art, the control method of the smoke machine with the purification function has different running powers of the wind curtain module, can reduce the escape of oil fume when performing the oil fume extraction work, and can send the negative ions farther when performing the purification operation.

Description

TECHNICAL FIELD

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

[0002] The range hood is an air extraction device in the kitchen. The range hood is provided with an exhaust fan in the air collecting cavity. The range hood is provided with an air inlet communicating with the air collecting cavity. When the range hood is started, the exhaust fan operates. The exhaust fan forms a negative pressure in the air collecting cavity. The air inlet also forms a negative pressure. Under the action of the negative pressure, the oil fume generated by the user during cooking enters the air collecting cavity through the air inlet and is then discharged. During cooking, the user stirs the food materials in the pot, which disturbs the oil fume flowing to the air inlet, causing the oil fume to escape. The escaped oil fume is inhaled by the user, which has an impact on the health of the user. SUMMARY

[0003] The present application relates to the technical field of range hood, in particular, to a control method of range hood with purification function.

[0004] The present application relates to the technical field of range hood, in particular, to a control method of range hood with purification function.

[0005] According to an embodiment of the present application, the range hood has an oil fume extraction mode, an off mode and a purification mode. The control method of the range hood is that: in the oil fume extraction mode, the exhaust fan operates, the air curtain module operates at a power P1, and the rotation module and the negative ion module do not operate; in the off mode, the exhaust fan, the air curtain module, the rotation module and the negative ion module are all in the off state; in the purification mode, the range hood is off, the negative ion module is started, the air curtain module operates at a power P2, and the rotation module operates to control the air outlet direction of the air curtain module; and the main control module controls the range hood to enter the off mode or the purification mode from the oil fume extraction mode.

[0006] According to an embodiment of the present application, the smoke machine further has a control panel, the control panel has a switch-on button and a purification button, and the control method of the smoke machine is as follows: when cooking, the switch-on button is started, the smoke machine enters the oil fume extraction mode, after cooking, the switch-on button is started again, the smoke machine enters the shutdown mode; during cooking, the purification button is started, after cooking, the switch-on button is started, the smoke machine enters the purification mode, and after running for a time T1 in the purification mode, the smoke machine enters the shutdown mode; when the smoke machine is in the shutdown mode, the purification button is started, the smoke machine enters the purification mode, and after running for a time T1 in the purification mode, the smoke machine enters the shutdown mode.

[0007] According to an embodiment of the present application, in the oil fume extraction mode, the air curtain assembly blows air vertically downward.

[0008] According to an embodiment of the present application, in the purification mode, the rotating module first makes the air curtain module blow air vertically downward for a time t1, and then makes the air curtain module swing air away from the user side for a time t2, wherein t1+t2=T1.

[0009] According to an embodiment of the present application, when the rotating module makes the air curtain module swing air away from the user side, the angle between the direction of the air curtain air and the vertical plane is 0° to 75°.

[0010] According to an embodiment of the present application, the smoke machine further comprises an air quality detection module, the air quality detection module is used to detect the air quality of the kitchen space, in the oil fume extraction mode, the main control module adjusts the power of the smoke fan according to the pollutant concentration value in the air detected by the air quality detection module, when the pollutant concentration value C in the air is greater than or equal to C1, the main control module increases the power of the smoke fan until the pollutant concentration value C in the air detected by the air quality detection module is less than C1 and maintains for a time T2.

[0011] According to an embodiment of the present application, the control method of the smoke machine is as follows: the smoke machine further has a cruise mode, after the smoke machine is turned off, the user can select the cruise mode to make the smoke machine enter the cruise mode, in the cruise mode, the air quality detection module detects the air quality of the kitchen space in real time and feeds back to the main control module, when the pollutant concentration value C in the air is greater than or equal to C2, the main control module starts the air curtain module, the rotating module and the negative ion module, the rotating module makes the air curtain module swing air toward the user side, and after the purification time reaches T3 when C is less than C2, the air curtain module, the rotating module and the negative ion module are turned off.

[0012] According to an embodiment of the present application, after time T4, if the air quality detection module still detects that the pollutant concentration value C in the air is greater than or equal to C2, the air curtain module, the rotating module and the negative ion module are closed, the exhaust fan is operated and the kitchen is ventilated until the pollutant concentration value C in the air is less than C2 and the time T5 is maintained, and then the exhaust fan is closed, wherein T4≤T3.

[0013] According to an embodiment of the present application, when the rotating module swings the air curtain module to the direction of the user side, the angle between the direction of the air curtain and the vertical plane is 0° to 75°. In the cruise mode, the user can set the time T6, so that the air quality detection module detects the pollutant concentration in the air every time interval T6. When the pollutant concentration value C in the air is less than C2, the air quality detection module is closed and started after the next time interval T6.

[0014] Compared with the prior art, the control method of the range hood with purification function has the following advantages:

[0015] 1. The range hood using the control method of the present application, when the exhaust fan is started, a negative pressure is formed at the air inlet of the range hood, and under the action of the negative pressure, the gas in the use environment flows to the air inlet and enters the air collecting cavity of the range hood from the air inlet, and then is discharged by the exhaust fan. When the exhaust fan is running, the air curtain module is started, the air curtain module blows air downward and forms an air curtain, the air curtain is located between the user and the cooking stove, can block the cooking fume and reduce the cooking fume escaping to the user side, and reduce the cooking fume inhaled by the user. After the cooking is finished, the exhaust fan is closed. When the negative ion module is started, the negative ion module starts to produce negative ions. The negative ions have a purification effect. When the air curtain module blows air and blows the negative ions to the use space, the negative ions purify the air in the use space in the process of being discharged by the air curtain, and have a purification effect on the use space.

[0016] 2、The control method of the smoke machine with purification function of the application makes the air curtain module have different power, when the smoke exhaust fan operates and sucks the oil fume, the air curtain module operates at power P1, at the power, the air curtain module can form the air curtain between the user and the cooking utensil, block the oil fume from escaping to the user side, reduce the amount of oil fume inhaled by the user, and at the secondary power, the air curtain wind does not affect the airflow flowing to the burner of the cooking utensil; after the smoke exhaust fan is turned off, when the negative ion module operates, the air curtain module operates at power P2 greater than P1, the air curtain wind generated by the air curtain module has relatively large wind speed, can blow out the negative ions generated by the negative ion module quickly, and the blowing distance is relatively far, so that the negative ions generated by the negative ion module can sufficiently purify the air in the use space, in addition, when the negative ion module operates, the rotating module operates and adjusts the air outlet direction of the air curtain module, so that the negative ions generated by the negative ion module are transported to different directions, so that the negative ions generated by the negative ion module can sufficiently purify the air in the use space, and improve the purification speed. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The control system diagram of the smoke machine adopting the control method of the smoke machine with purification function of the application;

[0018] Figure 2 The control flowchart of the control method of the smoke machine with purification function of the application;

[0019] The implementation and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0020] Several embodiments of the application will be described hereinafter with reference to the drawings; many practical details are described in the following description to provide a thorough understanding of the application. However, it should be pointed out that these practical details are not intended to limit the application. That is, in some embodiments of the 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 simplified schematic manner.

[0021] It should be noted that all directional references (such as upper, lower, left, right, front, rear, etc.) used herein are only used for explaining the relative position relationship between the components, the movement state, etc. in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional references will also change accordingly.

[0022] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description, and are not intended to particularly indicate the order or sequence, nor to limit the present application, which are merely for distinguishing 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 various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and 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 within the protection scope required by the present application.

[0023] In order to further understand the content, characteristics and effects of the present application, the following examples are given, and are described in detail as follows with reference to the accompanying drawings:

[0024] The application discloses a control method of a range hood with a purification function, and the control method of the range hood with the purification function comprises a main control module, an exhaust fan, an air curtain module, a rotating module and a negative ion module, the exhaust fan, the air curtain module, the rotating module and the negative ion module are connected with the main control module, the rotating module is used for adjusting the air outlet direction of the air curtain module, the air outlet direction of the air curtain module determines the flow direction of the negative ions generated by the negative ion module, and the control method of the range hood is as follows: when the exhaust fan is running, the air curtain module runs at a power P1, and the rotating module and the negative ion module do not run; when the range hood is turned off and the negative ion module is started, the air curtain module runs at a power P2, and the rotating module runs to control the air outlet direction of the air curtain module, wherein P1 < P2. The range hood adopting the control method can form a negative pressure at the air inlet of the range hood when the exhaust fan is started, under the action of the negative pressure, the gas in the use environment flows to the air inlet and enters the air collecting cavity of the range hood from the air inlet, and then is discharged by the exhaust fan, when the exhaust fan is running, the air curtain module is started, the air curtain module blows air downward and forms an air curtain, the air curtain is located between the user and the cooking stove, can block the oil fume generated in cooking, reduces the oil fume escaping to the user side, and reduces the oil fume inhaled by the user; after cooking is completed, the exhaust fan is turned off, when the negative ion module is started, the negative ion module starts to generate negative ions, the negative ions have a purification effect, when the air curtain module blows air and blows the negative ions to the use space, the negative ions purify the air in the use space in the process of being discharged by the air curtain, and the use space is purified.

[0025] The farther the position is from the air outlet of the air curtain assembly, the smaller the wind speed is in the process of the wind flowing downward. Since the power of the air curtain module is too large during cooking, the height of the lowest end of the air curtain formed by the air discharged by the air curtain module can extend to the surface of the cooktop or below the surface of the cooktop. The air curtain can affect the airflow flowing to the burner of the cooktop, and affect the combustion efficiency of the burner. Therefore, in the normal cooking process, the ideal state is that the lowest end of the air curtain formed by the air curtain module is higher than the burner of the cooktop. In this way, the air curtain formed by the air curtain module can effectively block the cooking oil fume from escaping to the user side, and can also avoid the air curtain wind affecting the airflow flowing to the burner. When the negative ion module is running, the ideal state is that the air curtain wind can quickly blow out the negative ions generated by the negative ion module and blow them to a relatively far place. In this way, the negative ions generated by the negative ion module can fully purify the air in the use space. Therefore, the control method of the range hood with a purification function of the present application makes the air curtain module have different powers. When the exhaust fan is running and sucking the oil fume, the air curtain module runs at a power P1. At this power, the air curtain module can form an air curtain between the user and the cooktop, block the oil fume from escaping to the user side, reduce the amount of oil fume inhaled by the user, and at the next power, the air curtain wind will not affect the airflow flowing to the burner of the cooktop. When the exhaust fan is turned off and the negative ion module is running, the air curtain module runs at a power P2 greater than P1. The wind speed of the air curtain wind generated by the air curtain module is relatively large, which can quickly blow out the negative ions generated by the negative ion module and blow them to a relatively far place. The negative ions generated by the negative ion module can fully purify the air in the use space. In addition, when the negative ion module is running, the rotating module runs and adjusts the air outlet direction of the air curtain module, which can transport the negative ions generated by the negative ion module to different directions, so that the negative ions generated by the negative ion module can fully purify the air in the use space and improve the purification speed.

[0026] The control method of the smoke machine with the purification function has the smoke extraction mode, the shutdown mode and the purification mode, and the control method of the smoke machine is that: in the smoke extraction mode, the smoke extraction fan operates, the air curtain module operates at the power P1, and the rotating module and the negative ion module do not operate; in the shutdown mode, the smoke extraction fan, the air curtain module, the rotating module and the negative ion module are all in the closed state, and in the purification mode, the smoke machine is closed, the negative ion module is started, the air curtain module operates at the power P2, and the rotating module operates to control the air outlet direction of the air curtain module; the main control module controls the smoke machine to enter the shutdown mode or the purification mode from the smoke extraction mode. When the user performs the cooking operation, the smoke machine is started, the smoke machine enters the smoke extraction mode, at this time, the smoke extraction fan of the smoke machine operates and forms a negative pressure in the smoke collection cavity of the smoke machine, the air curtain module operates at the power P1 and forms an air curtain between the user and the stove, so as to avoid that the cooking oil fume escapes to the user side, at this time, the main function of the smoke machine is to extract the cooking oil fume, so as to quickly extract and discharge the cooking oil fume, at this time, the negative ion module and the rotating module are closed; when the user completes the cooking operation, the smoke machine is closed, if the smoke machine enters the shutdown mode, the smoke extraction fan is closed, the air curtain module is closed, and the negative ion module and the rotating module are still in the closed state; when the user completes the cooking operation, the smoke machine is closed, if the smoke machine enters the purification mode, at this time, the smoke extraction fan is closed, the negative ion module is started and releases the negative ions, the power of the air curtain module is increased from P1 to P2, so as to quickly blow out the negative ions generated by the negative ion module and blow them farther, at the same time, the rotating module is started, the rotating module changes the air outlet direction of the air curtain module, so as to make the air curtain module blow the negative ions generated by the negative ion module to different directions.

[0027] When the user completes the cooking operation, the smoke machine enters the shutdown mode or the purification mode from the smoke extraction mode, which can be actively controlled by the user, when actively controlled by the user, the smoke machine also has a control panel, the control panel has a switch-on / off button and a purification button, the control method of the smoke machine is that: when performing the cooking operation, the switch-on / off button is started, the smoke machine enters the smoke extraction mode, after the cooking is completed, the switch-on / off button is started again, the smoke machine enters the shutdown mode; the purification button is started during the cooking process, after the cooking is completed, the switch-on / off button is started, the smoke machine enters the purification mode, and after running for a time T1 in the purification mode, the smoke machine enters the shutdown mode; when the smoke machine is in the shutdown mode, the purification button is started, the smoke machine enters the purification mode, and after running for a time T1 in the purification mode, the smoke machine enters the shutdown mode. That is to say, when the smoke machine is in the smoke extraction mode, if the user starts the purification mode through the control panel at this time, after the user completes the cooking operation, the user clicks the switch-on / off button, the smoke machine will enter the purification mode, if the user does not make other choices when the smoke machine is in the smoke extraction mode, when the cooking is completed, the user clicks the switch-on / off button, the smoke machine directly enters the shutdown mode. When the smoke machine enters the purification mode, the main control module is provided with a purification time T1, the smoke machine will enter the shutdown mode after running for a time T1 in the purification mode.

[0028] When the smoke machine is in the purification mode and the purification time is less than T1, if the user clicks the purification button, the smoke machine will end the purification operation in advance and enter the shutdown mode, and if the user clicks the on-off button, the smoke machine will end the purification operation in advance and enter the smoke extraction mode.

[0029] The control method of the smoke machine with a purification function in the smoke extraction mode, the air curtain assembly blows vertically downward. The blowing distance of the air curtain module when running at power P1 is fixed. For the convenience of description, the blowing distance of the air curtain module when running at power P1 is defined as L, the blowing height is defined as H, and the included angle between the blowing direction and the vertical direction is defined as θ. There is a relationship between the blowing distance L and the blowing height H: H=Lcosθ. It is easy to know that the smaller the θ angle, the greater the blowing height. Therefore, when the smoke machine is in the smoke extraction mode, the air curtain assembly blows vertically downward. At this time, the included angle θ between the blowing direction of the air curtain module and the vertical direction is 0, the blowing height H is equal to the blowing distance H, and the air curtain module runs at a smaller power P1, so that the air curtain wind is sent to the set distance.

[0030] The control method of the smoke machine with a purification function in the purification mode, the rotating module first makes the air curtain module blow vertically downward for t1 time, and then the rotating module makes the air curtain module swing to blow for t2 time in the direction away from the user side, wherein t1+t2=T1. When the user performs the cooking operation, oil smoke and oil stains splashed during cooking are adhered to the wall surface where the smoke machine is installed or the back plate of the smoke machine and the cooktop surface in the flow direction of the airflow. In the initial stage of the smoke machine entering the purification mode, the rotating module makes the air curtain module blow vertically downward, so that the air curtain wind blows to the cooktop surface. The negative ions sent out by the air curtain wind can purify the cooktop surface. After the purification time t1, the rotating module is started to make the air curtain module swing to blow, and the air curtain module swings to blow in the direction away from the user side. The wind blown by the air curtain module transports the negative ions to the direction of the wall surface where the smoke machine is installed or the back plate of the smoke machine. Within the time t2 of the swing blowing of the air curtain module, within the range of the swing blowing of the negative ions, the particles of oil smoke and harmful substances react with the negative ions to form particulate matter and deposit downward.

[0031] The control method of the smoke machine with the purification function of the application is characterized in that when the rotating module swings the air curtain module to blow air in the direction away from the user side, the angle between the direction of the air curtain air and the vertical plane is 0-75 degrees. The top plate or the head of the smoke machine is provided with an air curtain air outlet, the air outlet direction of the air curtain air outlet is arranged downward, the air curtain module is arranged in the main body of the smoke machine, the air blown by the air curtain module is blown out through the air curtain air outlet, when the rotating module rotates the air curtain module, the air outlet direction of the air curtain module changes, if the angle between the air outlet direction of the air curtain module and the vertical plane is too large, part of the air outlet of the air curtain module will be blocked by the wall where the air curtain air outlet is located, the air curtain air will partially enter the upper part of the wall, affecting the air outlet amount of the air curtain module, therefore, when the air curtain module swings to blow air during the rotation of the rotating module, the air outlet direction of the air curtain module is controlled to be 0-75 degrees with the vertical plane, in this way, the air outlet of the air curtain module can blow negative ions to different directions, and the air outlet amount of the air curtain module can be ensured.

[0032] The control method of the smoke machine with the purification function has the advantages that the smoke machine further comprises an air quality detection module, the air quality detection module is used for detecting the air quality of the kitchen space, in the oil fume extraction mode, the main control module adjusts the power of the smoke exhaust fan according to the pollutant concentration value in the air detected by the air quality detection module, when the pollutant concentration value C in the air is greater than or equal to C1, the main control module increases the power of the smoke exhaust fan until the pollutant concentration value C in the air detected by the air quality detection module is less than C1 and the maintaining time T2 is maintained.

[0033] The air quality detection module can adopt a smoke sensor, when the smoke sensor is adopted, the smoke sensor detects the smoke concentration in the air; the air quality detection module can also adopt a PM2.5 detection module, when the PM2.5 detection module is adopted, the PM2.5 detection module detects the negative ion content in the air.

[0034] The control method of the smoke machine with the purification function of the application, the control method of the smoke machine is that: the smoke machine also has a cruise mode, after the smoke machine is turned off, the user can select the cruise mode to make the smoke machine enter the cruise mode, in the cruise mode, the air quality detection module detects the air quality of the kitchen space in real time and feeds back to the main control module, when the concentration value C of the pollutants in the air is greater than or equal to C2, the main control module starts the air curtain module, the rotating module and the negative ion module, the rotating module makes the air curtain module swing to blow air towards the user side, and after the concentration value C of the pollutants in the air is less than C2 and the purification time reaches T3, the air curtain module, the rotating module and the negative ion module are closed. When the smoke machine is turned off and enters the cruise mode, the air quality detection module operates and monitors the air quality in the environment, the detection result of the air quality detection module is uploaded to the main control module in real time, when the air quality detection module detects that the concentration value C of the pollutants in the air is greater than or equal to C2, the main control module starts the air curtain module, the rotating module and the negative ion module, the rotating module makes the air curtain module swing to blow air towards the user side, the negative ion generated by the negative ion module purifies the air in the environment, the pollutants in the air react with the negative ions to form particles that can sink and sink, during the purification process, when the air quality detection module detects that the concentration value C of the pollutants in the air satisfies C2 and the purification time reaches T3, the smoke machine completes the purification work, the air curtain module, the rotating module and the negative ion module are closed, and the air quality detection module continues to monitor the air quality.

[0035] The control method of the smoke machine with the purification function of the application, after the time T4, if the air quality detection module still detects that the concentration value C of the pollutants in the air is greater than or equal to C2, the air curtain module, the rotating module and the negative ion module are closed, the exhaust fan operates and ventilates the kitchen, until the concentration value C of the pollutants in the air is less than C2 and maintains for the time T5, then the exhaust fan is closed, wherein T4≤T3. After the purification process has been carried out for a period of time T4, if the concentration of pollutants in the air cannot be reduced all the time, it indicates that the air pollution in the use space is serious at this time or there is an oil fume backflow situation, and the negative ion module alone cannot purify the air in time, at this time, the main control module closes the air curtain module, the rotating module and the negative ion module, and starts the exhaust fan, so that the exhaust fan ventilates the use space to purify the air in the use space, during the operation of the exhaust fan, when the air quality detection module detects that the concentration value C of the pollutants in the air is less than C2 and maintains for the time T5, the smoke machine completes the purification work, and the exhaust fan is closed.

[0036] In the process of purification, if the exhaust fan is running, at this time, if the negative ion module is started, the generated negative ions will be sucked into the smoke chamber of the exhaust fan, which is not helpful to the air of the purification space. Therefore, when the exhaust fan ventilates the kitchen, the negative ion module is closed. In addition, since the exhaust fan ventilates the use environment, the air in the entire kitchen is air with excessive pollutant concentration. At this time, the air curtain module does not need to run, so when the exhaust fan ventilates the use space, the air curtain module is also closed.

[0037] The control method of the smoke machine with purification function of the present application, when the rotating module swings the air curtain module to blow air to the direction of the user side, the angle between the direction of the air curtain wind and the vertical plane is 0° to 75°. As the principle of the purification mode, the air curtain air outlet is arranged on the top plate or the head of the smoke machine, the direction of the air outlet of the air curtain air outlet is arranged downward, the air curtain module is arranged in the main body of the smoke machine, the air blown by the air curtain module is blown out through the air curtain air outlet, when the rotating module rotates the air curtain module, the direction of the air outlet of the air curtain module changes, if the angle between the direction of the air outlet of the air curtain module and the vertical plane is too large, part of the air outlet of the air curtain module will be blocked by the wall where the air curtain air outlet is located, part of the air curtain wind will enter above the wall, affecting the air volume of the air curtain module, therefore, when the air curtain module swings to blow air when the rotating module rotates, the direction of the air outlet of the air curtain module is controlled between 0° and 75° with the vertical plane, in this way, the air outlet of the air curtain module can blow negative ions to different directions, and the air volume of the air curtain module can be guaranteed.

[0038] The control method of the smoke machine with the purification function of the application, in the cruise mode, the user can set the time length T6, so that the air quality detection module detects the pollutant concentration in the air every interval time T6, when the pollutant concentration value C in the air is less than C2, the air quality detection module is closed and started after waiting for the next time period T6. Between two meals and at night, the user does not appear frequently in the kitchen, and the real-time detection of the air quality by the air quality detection module is too wasteful, the interval time T6 is set, so that the air quality detection module detects the air quality every interval time T6, which can monitor the air condition of the kitchen environment, and does not cause energy waste. And the smoke machine starts the cruise mode, mainly to make the air quality in the kitchen meet the standard when the user is in the kitchen space, between breakfast and lunch and between lunch and dinner, the user has the probability of appearing in the kitchen, and when the air in the kitchen flows to the dining room and the living room, it will also affect the user in the dining room or the living room, so in the time period between two meals, the air quality detection module detects the air quality every interval time T6, to avoid the polluted air flowing to the living room and the dining room when the air in the kitchen is polluted, affecting the health of the user in the living room and the dining room. After 12 o'clock at night after dinner, the probability of the user appearing in the kitchen, the living room and the dining room is small, at this time, the cruise mode can be closed, or the detection time T6 is prolonged, to avoid the energy consumption caused by the continuous running of the air quality detection module.

[0039] The above is only the preferred embodiment of the application, and is not used to limit the application, any modification, equivalent replacement or improvement within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A control method for a range hood with a purification function, characterized in that: The range hood includes a main control module, a smoke exhaust fan, an air curtain module, a rotation module and a negative ion module. The smoke exhaust fan, air curtain module, rotation module and negative ion module are connected to the main control module. The rotation module is used to adjust the air outlet direction of the air curtain module. The air outlet direction of the air curtain module determines the flow direction of the negative ions generated by the negative ion module. The range hood has a range hood mode, a shutdown mode and a purification mode. The main control module controls the range hood to enter the shutdown mode or the purification mode from the range hood mode. The control method of the range hood is: in the range hood mode, the smoke exhaust fan is running, the air curtain is on, and the negative ion module is turned on. The module runs at power P1, and the rotation module and the negative ion module do not run; in shutdown mode, the smoke exhaust fan, air curtain module, rotation module and negative ion module are all in the off state; in purification mode, when the smoke exhaust fan is turned off and the negative ion module is started, the air curtain module runs at power P2, and the rotation module runs to control the air outlet direction of the air curtain module. The rotation module first makes the air curtain module supply air vertically downward for t1 time, and then the rotation module makes the air curtain module swing in the direction away from the user side to supply air for t2 time, wherein P1<P2, t1+t2=T1.

2. The control method of the range hood with purification function according to claim 1, characterized in that: The range hood also has a control panel, which has a power button and a purification button. The control method of the range hood is as follows: when cooking, start the power button, the range hood enters the range fume extraction mode, and after cooking, start the power button again, the range hood enters the shutdown mode; during the cooking process, start the purification button, and after cooking, start the power button, the range hood enters the purification mode, and after running in the purification mode for T1 time, enters the shutdown mode; when the range hood is in the shutdown mode, start the purification button, the range hood enters the purification mode, and after running in the purification mode for T1 time, enters the shutdown mode.

3. The control method of the range hood with purification function according to claim 1, characterized in that: In the range fumes extraction mode, the air curtain module supplies air vertically downward.

4. The control method of the range hood with purification function according to claim 1, characterized in that: When the rotating module causes the air curtain module to swing in a direction away from the user side to supply air, the angle between the direction of the air curtain wind and the vertical plane is 0° to 75°.

5. The control method of the range hood with purification function according to claim 1, characterized in that: The range hood also includes an air quality detection module, which is used to detect the air quality of the kitchen space. In the range hood mode, the main control module adjusts the power of the smoke exhaust fan according to the pollutant concentration value in the air detected by the air quality detection module. When the pollutant concentration value C in the air is greater than or equal to C1, the main control module will increase the power of the smoke exhaust fan until the pollutant concentration value C in the air detected by the air quality detection module is less than C1 and is maintained for time T2.

6. The control method of the range hood with purification function according to claim 5, characterized in that: The control method of the range hood is as follows: the range hood also has a cruise mode. After the range hood is turned off, the user can select the cruise mode to put the range hood into cruise mode. In cruise mode, the air quality detection module detects the air quality of the kitchen space in real time and feeds back to the main control module. When the pollutant concentration value C in the air is greater than or equal to C2, the main control module will start the air curtain module, the rotation module and the negative ion module. The rotation module causes the air curtain module to swing toward the user side to supply air. After C is less than C2 and the purification time reaches T3, the air curtain module, the rotation module and the negative ion module are turned off.

7. The control method of the range hood with purification function according to claim 6, characterized in that: After time T4, if the air quality detection module still detects that the pollutant concentration value C in the air is ≥ C2, the air curtain module, the rotation module and the negative ion module are closed, and the smoke exhaust fan runs and ventilates the kitchen until the pollutant concentration value C in the air is < C2 and is maintained for T5, and then the smoke exhaust fan is turned off, where T4 ≤ T3.

8. The control method of the range hood with purification function according to claim 6, characterized in that: When the rotation module causes the air curtain module to swing toward the user side to supply air, the angle between the wind direction of the air curtain and the vertical plane is 0° to 75°; in the cruise mode, the user can set the time length T6 so that the air quality detection module detects the pollutant concentration in the air once every interval T6. When the pollutant concentration value C in the air is less than C2, the air quality detection module is turned off and waits for the next time period T6 to start.

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