CN114263945A

CN114263945A - Range hood, control method and medium

Info

Publication number: CN114263945A
Application number: CN202010968677.XA
Authority: CN
Inventors: 梁泽锋; 刘智; 曲绍鹤
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2022-04-01

Abstract

The utility model provides a range hood, is in including range hood body and setting air purification device on the range hood body, air purification device includes the casing, sets up air intake and air outlet on the casing, and the intercommunication the air intake with the wind channel of air outlet, be provided with fan module in the wind channel for make the air current follow the air intake gets into the wind channel is followed the air outlet blows off, air outlet department is provided with air supply module, air supply module is used for adjusting air purification device's air-out angle, range hood still includes detection module and control module, detection module is used for detecting user's position and with the testing result send to control module, control module is used for adjusting according to detection module's testing result air supply module's air-out angle. The invention also discloses a control method of the range hood and a computer readable storage medium.

Description

Range hood, control method and medium

Technical Field

The invention relates to the technical field of air purification, in particular to a range hood, a control method of the range hood and a computer readable storage medium.

Background

The existing range hood can rapidly discharge waste gas generated by combustion of a stove and oil smoke generated in the cooking process to the outside, and reduces the pollution to the air environment in a kitchen. However, part of the pollutants such as exhaust gas and oil smoke will escape the adsorption range of the range hood. And the pollutants stay in the kitchen for a long time, thus threatening the health of people. Meanwhile, the main function of the range hood is to suck away pollutants in the cooking process, but the original air quality in a kitchen cannot be improved.

Disclosure of Invention

The embodiment of the invention mainly aims to provide a range hood, aiming at solving the problem of air quality in a kitchen.

In order to achieve the above object, an embodiment of the present invention provides a range hood, which includes a range hood body and an air purification device disposed on the range hood body, the air purification device comprises a shell, an air inlet and an air outlet which are arranged on the shell, and an air duct communicating the air inlet and the air outlet, a fan module is arranged in the air duct, the air duct is used for enabling air flow to enter the air duct from the air inlet and blow out from the air outlet, an air supply module is arranged at the air outlet, the air supply module is used for adjusting the air outlet angle of the air purification device, the range hood also comprises a detection module and a control module, the detection module is used for detecting the position of a user and sending the detection result to the control module, the control module is used for adjusting the air outlet angle of the air supply module according to the detection result of the detection module.

Through detecting user's position and with the testing result send to control module, control module can be according to user's position adjustment air supply module's air-out angle to form an air current wall between user's head and lampblack absorber, in order to prevent that the user from breathing the oil smoke or the waste gas that produce among the culinary art process.

Preferably, the air supply module includes a first air guide assembly, the first air guide assembly is disposed in the air duct and rotatably disposed at the air outlet, and the air flow in the air duct is blown out to the outside through the first air guide assembly. The first air guide assembly is arranged to enable the air outlet angle of the air supply module to be adjusted through the first air guide assembly.

Preferably, the first air guide assembly includes a first blade and a first motor, the first motor is connected to the rotating shaft of the first blade to drive the first blade to rotate, and the rotating shaft of the first blade is parallel to the ground to adjust the air outlet angle of the air supply module. The rotating shaft of the first blade is driven to rotate by the first motor so as to realize the adjustment of the rotating angle of the first blade. In addition, because the rotating shaft of the first blade is parallel to the ground, the air outlet angle of the air supply module can be adjusted up and down according to the different heights of users.

Preferably, the air supply module further includes a second air guide assembly, the second air guide assembly is disposed inside the air duct and rotatably disposed at the air outlet, a distance between the second air guide assembly and the air outlet is greater than a distance between the first air guide assembly and the air outlet, and the air flow in the air duct is transmitted to the first air guide assembly through the second air guide assembly. Through setting up second wind guide module, air supply module's air-out angle becomes more nimble.

Preferably, the second air guide assembly comprises a second blade and a second motor, the second motor is connected to the rotating shaft of the second blade to drive the second blade to rotate, and the rotating shaft of the second blade is perpendicular to the ground to adjust the air outlet angle of the air supply module in a left-right mode. And the rotating shaft of the second blade is driven to rotate by the second motor so as to realize the adjustment of the rotating angle of the second blade. In addition, because the rotating shaft of the second blade is vertical to the ground, the air outlet angle of the air supply module can be adjusted left and right according to the position of a user.

Preferably, when a user is located on the left side of the vertical symmetric plane of the air outlet, the control module controls the second blades of the second air guiding assembly to rotate towards the left side, and when the user is located on the right side of the vertical symmetric plane of the air outlet, the control module controls the second blades of the second air guiding assembly to rotate towards the right side. The control module controls the second blades of the second air guide assembly to rotate towards the direction of a user, so that the airflow flowing speed of the position where the user is located can be higher, and the oil smoke or waste gas isolation effect of the airflow wall is enhanced.

Preferably, the second blade rotation angle and the position of the user satisfy the following relationship: β ═ arctan (D2/D1), where β is the rotation angle of the second blade relative to the vertical plane of symmetry of the outlet, D1 is the horizontal distance between the plane of the outlet and the user, and D2 is the horizontal distance between the tip of the user's nose and the vertical plane of symmetry of the outlet. The rotation angle of the second blade and the position relation of the user can enable the air flow generated by the air purification device to be over against the body position of the user so as to enhance the isolation effect of the oil smoke or the waste gas of the air flow wall.

Preferably, when the number of users is two or more, the control module controls the second blade of the second wind guide assembly to swing left and right. By cyclically swinging the second blade left and right, the cooking process of a plurality of users can be made more comfortable.

Preferably, the detection module is further configured to detect a height of a user, and the control module adjusts a rotation angle of the first blade according to the height of the user to satisfy the following relationship: alpha is less than or equal to arctan (D1/(H2-H1+ H3)), wherein alpha is a rotation angle of the first blade relative to a plane where the air outlet is located, D1 is a horizontal distance between the plane where the air outlet is located and a user, H2 is the height of the air outlet relative to the ground, H1 is the height of the user, and H3 is the height of the head of the user. The rotation angle of the first blade and the height of a user meet the following conditions: the relation of alpha ≦ arctan (D/(H2-H1+ H3)) aims to prevent discomfort to the user by blowing the airflow generated by the blower module below the user's neck, rather than directly against the face of the user. In addition, the arrangement mode can also effectively form an airflow wall between the head of a user and the range hood so as to effectively isolate the oil smoke generated in the cooking process from the head of the user.

Preferably, when the horizontal distance between the plane where the air outlet is located and the user is greater than a preset distance, the control module adjusts the function of the air outlet angle of the air supply module according to the detection result of the detection module to be turned off, and when the distance between the user and the air purification device is less than or equal to the preset distance, the control module adjusts the function of the air outlet angle of the air supply module according to the detection result of the detection module to be turned on. The above mode makes the control of lampblack absorber is more intelligent, when the user with air purification device's distance is greater than when predetermineeing the distance, shows that the user is not ready to use cooking utensils yet, at this moment, need not adjust according to detection module's testing result the air-out angle of air supply module. When the distance between the user and the air purification device is smaller than the preset distance, the user is indicated to prepare cooking or cook food, and the cooking process can generate large oil smoke. At the moment, the control module can automatically adjust the air outlet angle of the air supply module according to the detected human body parameters.

Preferably, when the distance between the user and the air purification device is greater than a preset distance, the rotation angle of the second blade relative to the vertical symmetry plane of the air outlet is 0 degree, and the rotation angle of the first blade relative to the plane where the air outlet is located is greater than 90 degrees and less than 180 degrees. Namely, when the user is not ready to use the stove, the included angle between the air outlet angle of the air supply module and the plane where the air outlet is located is larger than 90 degrees and smaller than 180 degrees. At this time, the air current is circulated in the kitchen through the air cleaning device, thereby effectively taking away the residual exhaust gas and oil smoke in the kitchen.

Preferably, the detection module comprises one or more of an ultrasonic sensor, a TOF image sensor and a structured light image sensor. Ultrasonic sensor, TOF image sensor and structured light image sensor can detect user's position, then send user's position to control module to make control module according to user's position adjustment air-out angle of air-out module.

The embodiment of the invention also provides a control method of the range hood, the range hood comprises a range hood body and an air purification device arranged on the range hood body, the air purification device comprises a shell, an air inlet and an air outlet which are arranged on the shell, and an air duct communicated with the air inlet and the air outlet, a fan module is arranged in the air duct and used for enabling air flow to enter the air duct from the air inlet and blow out from the air outlet, an air supply module is arranged at the air outlet and used for adjusting the air outlet angle of the air purification device. The control method of the range hood comprises the following steps:

detecting a position of a user;

and adjusting the air outlet angle of the air supply module according to the position of a user.

Preferably, the air supply module further includes a first air guide assembly and a second air guide assembly, the first air guide assembly and the second air guide assembly are arranged in the air duct and rotatably arranged at the air outlet, the distance between the second air guide assembly and the air outlet is greater than that between the first air guide assembly and the air outlet, the air flow in the air duct is transmitted to the first air guide assembly through the second air guide assembly, and the air outlet angle of the air supply module and the position of a user satisfy the following relations: β ═ arctan (D2/D1), where β is a rotation angle of the second blades of the two air guiding assemblies with respect to a vertical symmetry plane of the air outlet, D1 is a horizontal distance between a plane where the air outlet is located and a user, and D2 is a horizontal distance between a tip of the nose of the user and the vertical symmetry plane of the air outlet. Setting the second blade rotation angle in relation to the user's position to: the purpose of β arctan (D2/D1) is to make the air flow generated by the air purification device directly face the body of the user, so as to enhance the isolation effect of the oil smoke or the exhaust gas from the air flow wall.

Preferably, the control method further includes the steps of:

detecting the height of a user;

and the rotating angle of the first blade of the first air guide assembly is adjusted according to the height of a user.

The arrangement mode can form an airflow wall between the head of a user and the range hood so as to prevent the user from breathing oil smoke or waste gas generated in the cooking process.

Preferably, the height of the user and the rotation angle of the first blade of the first wind guide assembly satisfy the following relationship: alpha is less than or equal to arctan (D1/(H2-H1+ H3)), wherein alpha is a rotation angle of the first blade relative to a plane where the air outlet is located, D1 is a horizontal distance between the plane where the air outlet is located and a user, H2 is the height of the air outlet relative to the ground, H1 is the height of the user, and H3 is the height of the head of the user. The arrangement mode can enable the air flow generated by the air supply module to be blown to the position below the neck of a user instead of being blown directly opposite to the face of the user, so that discomfort of the user is avoided. In addition, the arrangement mode can also effectively form an airflow wall between the head of the user and the range hood so as to effectively isolate the oil smoke generated in the cooking process from the head of the user.

The embodiment of the invention also provides a computer readable storage medium, wherein the computer readable storage medium is used for storing the control program of the range hood, and the control program of the range hood realizes the control method of the range hood as described above when being executed by the processor.

In the technical scheme provided by the embodiment of the invention, by detecting the position of a user, the control module can adjust the air outlet angle of the air supply module according to the position of the user, so that an airflow wall is formed between the head of the user and the range hood, and the user breathes oil smoke or waste gas generated in the cooking process. The mode is simple to realize and convenient to use, and the formed airflow wall can effectively isolate the oil smoke generated in the cooking process from entering the breathing area of a user, so that the cooking process of the user becomes more comfortable and convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a range hood provided in an embodiment of the present invention.

Fig. 2 is a schematic structural view of the air cleaning device in fig. 1 with the housing removed.

Fig. 3 is an exploded view of the range hood of fig. 1.

Fig. 4 is a schematic structural diagram of the blower module in fig. 3.

Fig. 5 is an exploded view of the blower module of fig. 4.

Fig. 6 is a schematic diagram of the airflow path when the range hood is in the circulating air cleaning mode.

FIG. 7 is a schematic view of a first blade angle of the blower module of FIG. 4 in a circulating air cleaning mode and a blower mode.

Fig. 8 is a second blade angle change schematic diagram of the air blowing module in fig. 4.

Fig. 9 is a schematic position diagram of a detection module in the range hood in fig. 1.

Fig. 10 is an electrical connection diagram of the detection module in fig. 9.

Fig. 11 is a schematic view illustrating adjustment of left and right air outlet angles of the range hood in fig. 1 in an actual use process.

Fig. 12 is a schematic view illustrating adjustment of an upper air outlet angle and a lower air outlet angle of the range hood in fig. 1 in an actual use process.

Fig. 13 is a control method of a range hood according to another embodiment of the present invention.

Fig. 14 is a control method of a range hood according to another embodiment of the present invention.

Fig. 15 is a schematic diagram of a hardware usage environment of a computer-readable storage medium according to an embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Smoke exhaust ventilator	2435	First gear
10	Smoke exhaust ventilator body	2436	Second gear
				20	Air purifying device	2411	Base plate
11	Smoke collecting component	2412	First side plate
				12	Case assembly	2413	Second side plate
21	Shell body	2414	Third side plate
				22	Fan module	2415	The fourth side plate
23	Filter screen module	2416	Fan connector
				24	Air supply module	2417	First mounting lug
211	Left air inlet	2418	Second mounting lug
				212	Right side air inlet	244	Blade mounting plate
213	Air outlet	2441	First end
				231	First filter screen module	2442	Second end
232	Second screen module	2443	Third terminal
				221	Air inlet of fan module	2444	Fourth terminal
222	Air outlet of fan module	2445	First mounting slot position
				241	Base seat	2446	Second mounting slot position
242	First air guide component	245	Panel board
				243	Second air guide assembly	30	Detection module
2421	First blade	40	Control moduleBlock
				2422	First rotating shaft	200	Kitchen range
2423	First connecting rod	50	Terminal device
				2424	First motor	51	Processor with a memory having a plurality of memory cells
2431	Second blade	52	Communication bus
				2432	Second axis of rotation	53	User interface
2433	Second connecting rod	54	Network interface
				2434	Second electric machine	55	Memory device

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" and/or "appears throughout, the meaning includes three parallel schemes, for example," A and/or B "includes scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 2, an embodiment of the invention provides a range hood 100, which includes a range hood body 10 and an air purification device 20 disposed on the range hood body 10. In this embodiment, the range hood body 10 includes a smoke collection assembly 11 and a chassis assembly 12. The smoke collection component 11 is arranged above the cooker and used for collecting pollutants such as oil smoke generated in the cooking process. The cabinet assembly 12 is provided with a flue, a controller, and the like. And cookers such as a gas stove and an electromagnetic stove are arranged below the range hood body 10. The stove is provided with a frying pan, a saucepan, a steamer and the like. The range hood body 10 is used for recovering and cleaning oil smoke or waste gas generated in the using process of the kitchen range.

Referring to fig. 3, the air purifying device 20 includes a housing 21, a blower module 22, a filter module 23, and an air supply module 24. The shell 21 is provided with a left air inlet 211, a right air inlet 212, an air outlet 213 and an air duct connecting the left air inlet 211 and the right air inlet 212 with the air outlet 213. It is understood that only one air inlet may be provided. In this embodiment, the strainer module 23 includes a first strainer module 231 and a second strainer module 232. The first and

second screen modules

231 and 232 are disposed at both ends of the housing 21, respectively. Specifically, the first screen module 231 is disposed at the left side of the housing 21, and the first screen module 231 is disposed near the left air inlet 211. Second screen module 232 is disposed on the right side of housing 21, and second screen module 232 is disposed near right side air inlet 212. The fan module 22 is disposed in the air duct, and is configured to enable air flow to enter the air duct from the left air inlet 211 and the right air inlet 212 and to be blown out from the air outlet 213. The blower module 22 includes an air inlet 221 and an air outlet 222. The air inlet 221 of the fan module 22 is communicated with the left air inlet 233 and the right air inlet 234 of the housing 21. The air outlet 222 of the fan module 22 is disposed adjacent to the air supply module 24. When the wind wheel in the fan module 22 rotates at a high speed, it can suck air from the air inlet 221 and blow the air out of the air outlet 222 at a certain speed. Therefore, the blower module 22 is configured to enable the airflow to enter the air purification apparatus 20 from the left air inlet 211 and the right air inlet 212, and after the airflow is filtered by the first filter screen module 231 and the second filter screen module 232, the clean airflow is delivered to the air supply module 24 and then delivered to the external environment by the air supply module 24. In this embodiment, the air outlet 222 of the fan module 22 is formed in a bell mouth shape, so as to increase the air supply area of the fan module 22 to the air supply module 24.

Referring to fig. 4, the air supply module 24 includes a base 241, and a first air guide assembly 242 and a second air guide assembly 243 disposed on the base 241. The first wind guiding assembly 242 and the second wind guiding assembly 243 are rotatably disposed inside the air duct and at the air outlet 213. The airflow in the air duct is blown out to the outside through the first air guiding assembly 242. The distance between the second air guiding assembly 243 and the air outlet 213 is greater than the distance between the first air guiding assembly 242 and the air outlet 213, and the air in the air duct is transmitted to the first air guiding assembly 242 through the second air guiding assembly 243, and then blown out to the external environment through the first air guiding assembly 242.

In this embodiment, the first air guiding assembly 242 includes a first blade 2421 and a first motor 2424, the first motor 2424 is connected to the rotating shaft of the first blade 2421 to drive the first blade 2421 to rotate, and the rotating shaft of the first blade 2421 is parallel to the ground to adjust the air outlet angle of the air supply module 24 up and down. The second air guiding assembly 243 includes a second blade 2431 and a second motor 2434, the second motor 2434 is connected to a rotation shaft of the second blade 2431 to drive the second blade 2431 to rotate, and the rotation shaft of the second blade 2431 is perpendicular to the ground to adjust an air outlet angle of the air supply module 24 in a left-right direction. The first motor 2424 and the second motor 2434 are stepper motors. Therefore, the first and

second blades

2421 and 2431 may be controlled to rotate by the first and

second motors

2424 and 2434, so as to adjust the wind outlet angle of the wind supply module 24.

Referring to fig. 5, in particular, the base 241 includes a bottom plate 2411, and a first side plate 2412, a second side plate 2413, a third side plate 2414 and a fourth side plate 2415 extending perpendicularly and outwardly from the bottom plate 2411. In this embodiment, the bottom plate 2411, the first side plate 2412, the second side plate 2413, the third side plate 2414 and the fourth side plate 2415 together form a long strip-shaped groove-shaped structure. The first side plate 2412 and the third side plate 2414 are located on two long sides of the bottom plate 2411. The second side panel 2413 and the fourth side panel 2415 are located on the two short sides of the bottom panel 2411. The base 241 is provided with a fan connector 2416, and the fan connector 2416 is used for connecting the air outlet 222 of the fan module 22. In this embodiment, the fan connection port 2416 is disposed on the first side plate 2412. It is understood that the fan connection port 2416 may be disposed on the third side plate 2414 or other positions, which are not limited herein. Specifically, the first motor 2424 is disposed on the second side plate 2413 for driving the first blade 2421 to rotate. The second motor 2434 is disposed on the third side plate 2414 to drive the second blade 2431 to rotate.

Specifically, the first air deflection assembly 242 includes a plurality of first blades 2421. The first blades 2421 are provided with first rotating shafts 2422, and the first rotating shafts 2422 are fixed on the base 241 so that the plurality of first blades 2421 can rotate relative to the base 241, thereby adjusting the air outlet angle of the air supply module 24. In the present embodiment, the first rotating shafts 2422 are disposed parallel to the ground, each of the first blades 2421 has one first rotating shaft 2422, and the plurality of first rotating shafts 2422 are spaced apart in the height direction so that the air outlet angle of the air supply module 24 can be adjusted up and down. When the included angle between the plane of the first blade 2421 and the direction perpendicular to the ground is 0 to 90 degrees, the airflow generated by the fan module 22 is blown out towards the direction of the ground after passing through the air supply module 24. When the included angle between the plane of the first blade 2421 and the direction perpendicular to the ground is 90 degrees to 180 degrees, the airflow generated by the fan module 22 is blown out towards the direction of the roof after passing through the air supply module 24. Specifically, the first wind guiding assembly 242 further includes a first linkage 2423, and the first linkage 2423 is connected to the plurality of first blades 2421 so that the plurality of first blades 2421 can rotate simultaneously. Specifically, the first link 2423 includes a body and a plurality of mounting holes provided on the body. The number of the mounting holes corresponds to the number of the first blades 2421. Each of the first blades 2421 is also provided with a second turning part. The second rotating portion is provided on the mounting hole of the first link 2423 and can rotate freely. When the first motor 2424 drives one of the first blades 2421 of the first air guiding assembly 242 to rotate, since the first rotating shaft 2422 of the first blade 2421 is fixed on the base 241, the position of the first link 2423 is displaced along with the rotation of the first blade 2421, so as to drive the other first blades 2421 to rotate at the same time. Therefore, only one motor is needed to drive the plurality of blades to rotate simultaneously, and cost is saved.

Specifically, the second wind guiding assembly 243 includes a plurality of second blades 2431. The second blades 2431 are provided with second rotation shafts 2432, and the second rotation shafts 2432 are fixed to the base 241 such that the plurality of second blades 2431 can rotate with respect to the base 241, thereby adjusting the left and right air outlet angles of the air supply module 24. In the present embodiment, the first rotating shaft 2422 is disposed perpendicular to the ground, each second blade 2431 has a second rotating shaft 2432, and the second rotating shafts 2432 are spaced apart in the horizontal direction so that the air outlet angle of the air supply module 24 can be adjusted left and right. When the included angle between the plane where the second blade 2431 is located and the left side of the plane where the air outlet is located is 0-90 degrees, the airflow generated by the fan module 22 is blown out towards the left side direction after passing through the air supply module 24. When the included angle between the plane where the second blade 2431 is located and the right side of the plane where the air outlet is located is 90 degrees to 180 degrees, the airflow generated by the fan module 22 is blown out in the right direction after passing through the air supply module 24. Specifically, the second air guiding assembly 243 further includes a second connecting rod 2433, and the second connecting rod 2433 is connected to the plurality of second blades 2431 so that the plurality of second blades 2431 can rotate simultaneously. Specifically, the second link 2433 includes a body and a plurality of mounting grooves provided on the body. The number of the mounting grooves corresponds to the number of the second blades 2431. Each of the second blades 2431 is also provided with a fourth rotation part. The fourth rotating part is disposed on the mounting groove of the second link 2433 and can freely rotate. When the second motor 2434 drives one of the second blades 2431 of the second wind guide assembly 243 to rotate, since the second rotating shaft 2432 of the second blade 2431 is fixed on the base 241, the position of the second link 2433 is displaced along with the rotation of the second blade 2431, so as to drive the other second blades 2431 to rotate at the same time. Therefore, only one motor is needed to drive the plurality of blades to rotate simultaneously, and cost is saved. The second air guiding assembly 243 further includes a first gear 2435 and a second gear 2436, as required. The first gear 2435 is fixed to the second motor 2434, such that the second motor 2434 can rotate the first gear 2435. The second gear 2436 is fixed to a second rotation shaft 2432 of the second blade 2431. The first gear 2435 and the second gear 2436 are engaged with each other, so that the second motor 2434 can drive the second blade 2431 to rotate, thereby adjusting the left and right air outlet angles of the second air guiding assembly 243.

In this embodiment, the air supply module 24 further includes a blade mounting plate 244, and the blade mounting plate 244 is fixedly connected to the base 241. The first rotating shaft 2422 of the first blade 2421 is clamped between the blade mounting plate 244 and the base 241. Specifically, the blade mounting plate 244 includes a first end 2441, a second end 2442, a third end 2443, and a fourth end 2444. The first end 2441 and the third end 2443 are provided with a plurality of screw hole locations for securing the blade mounting plate 244 to the base 241. Correspondingly, the first side plate 2412 and the third side plate 2414 of the base 241 are also provided with corresponding screw hole positions. The first end 2441 of the blade mounting plate 244 is fixed to the first side plate 2412 of the base 241 by screws, and the third end 2443 of the blade mounting plate 244 is fixed to the third side plate 2414 of the base 241 by screws. At this time, the base 241 and the blade mounting plate 244 are fixed together, thereby clamping one end of the first rotating shaft 2422 on the second side plate 2413 and the second end 2442, and clamping the other end of the first rotating shaft 2422 on the fourth side plate 2415 and the fourth end 2444. It will be appreciated that the blade mounting plate 244 may also be secured to the base 241 by a snap-fit arrangement. A plurality of first mounting grooves 2445 are provided at the second end 2442 and the fourth end 2444 to fix both ends of the first rotating shaft 2422 to prevent the first rotating shaft 2422 from being displaced, as required. As required, a plurality of first mounting protrusions 2417 are disposed on the second side plate 2413 and the fourth side plate 2415 to match with the first mounting groove 2445. The first mounting boss 2417 is received in the first mounting slot 2445 when the blade mounting plate 244 is secured to the base 241. A gap is formed between the top surface of the first mounting protrusion 2417 and the bottom surface of the first mounting groove 2445 to accommodate the two ends of the first rotating shaft 2422. Similarly, a plurality of second mounting grooves 2446 are provided at the first end 2441 and the third end 2443 to fix both ends of the second rotating shaft 2432 to prevent the second rotating shaft 2432 from being displaced. As required, a plurality of second mounting protrusions 2418 matched with the second mounting groove 2446 are disposed on the first side plate 2412 and the third side plate 2414. The second mounting boss 2418 is received in the second mounting slot 2446 when the blade mounting plate 244 is secured to the base 241. Gaps are formed between the top surfaces of the second mounting protrusions 2418 and the bottom surfaces of the second mounting grooves 2446 to accommodate the two ends of the second rotating shaft 2422.

The air supply module 24 further includes a panel 245, as required. The panel 245 covers the blade mounting plate 244 to shield the entire mounting structure of the blower module 24 and to enhance the appearance. In this embodiment, the face plate 245 is secured to the blade mounting plate 244 by a snap-fit. It will be appreciated that the face plate 245 may also be secured to the blade mounting plate 244 by screws. In the installation process of the air supply module 24, the plane of the air outlet of the air supply module 24 is perpendicular to the ground, so that the fan connection port 2416 faces upward to receive the airflow generated by the fan module 22. The rotation angles of the first blade 2421 and the second blade 2431 are adjusted by the first motor 2424 and the second motor 2434, so that the air outlet angle of the air supply module 24 is adjusted.

Referring to fig. 6, in order to effectively reduce the oil smoke in the kitchen and restore the clean air environment, the air purification apparatus 20 is provided with a circulating air purification mode. In the working mode, an included angle between the plane where the first blade 2421 is located and the direction perpendicular to the ground is adjusted to be 90 degrees to 180 degrees, and an included angle between the plane where the second blade 2431 is located and the air outlet surface of the air supply module 24 is adjusted to be 90 degrees. At this time, air returns from the left and right side surfaces of the air purification device 20, and air is discharged obliquely upwards from the front surface. In fig. 6, the airflow path X is an airflow flow path near the roof. In the circulating air purification mode, the air purification device 20 can sufficiently stir the air in the kitchen to circulate the air in the kitchen, so that the pollutants can timely enter the air purification device 20 through the air flow, and the pollutants are treated by the first filter screen module 231 and the second filter screen module 232 therein, and finally, the fan module 22 discharges clean air through the air outlet. The air purification device 20 can work together with the range hood body 10, and can effectively reduce the oil smoke in a kitchen. If necessary, in the above-mentioned circulating air cleaning mode, the second blades 2431 may be configured to swing left and right, so that the air cleaning device 20 can achieve a wider range of air circulation. The air cleaning device 20 is also provided with an air supply mode. In the air supply mode, an included angle between a plane where the first blades 2421 are located and the direction perpendicular to the ground is adjusted to be 0-90 degrees, so that an air wall is formed between the cooker and a user, and oil smoke generated when the cooker works is prevented from reaching a breathing area of the user. Meanwhile, the oil smoke flows back to the smoke collection assembly 11 of the range hood body 10 under the action of the range hood body 10, so that the user can breathe clean air, and the health of the user is protected. Fig. 7 is a cross-sectional view of the blower module 24. It can be seen that, in the circulating air cleaning mode, the angle between the plane where the first blade 2421 is located and the direction perpendicular to the ground surface can be adjusted to 90 degrees to 180 degrees (as shown in a2 position) to sufficiently stir the air in the kitchen. In the air supply mode, the included angle between the plane where the first blade 2421 is located and the direction perpendicular to the ground can be adjusted to 0 degree to 90 degrees (as shown in a position of 1) to form a wind wall between the cooker and a user, so that the user cannot easily suck oil smoke. Fig. 8 is a cross-sectional view of the air blowing module 24 in another direction. When the second blade is located at position B1, the air outlet direction of the air supply module 24 is the left side. When the second blade is located at position B2, the air outlet direction of the air supply module 24 is the right side.

Referring to fig. 9 and 10, the extractor hood 100 further includes a detection module 30, and the detection module 30 is configured to detect a position of a user. The range hood 100 is further provided with a control module 40 inside. After the detection module 30 detects the position of the user, the detection result is sent to the control module 40. The control module 40 is configured to adjust an air outlet angle of the air supply module 24 according to a detection result of the detection module 30. The detection module 30 may be an ultrasonic sensor or a TOF (Time of Flight) sensor, as needed. In the present embodiment, the detection module 30 is a TOF sensor.

The principle of ultrasonic ranging is as follows: an ultrasonic wave transmitting device and an ultrasonic wave receiving device are provided in an ultrasonic sensor, the ultrasonic wave transmitting device is caused to transmit an ultrasonic wave in a certain direction, and timing is started simultaneously with the transmission. The emitted ultrasonic wave is transmitted in the air and immediately returns when encountering an obstacle on the way. The ultrasonic receiving device stops timing immediately when receiving the reflected ultrasonic wave. The propagation speed of the ultrasonic wave in the air is fixed and is 340 m/s. According to the time t recorded by the timer, the distance D between the ultrasonic sensor and the obstacle can be calculated, namely: d is 340 t/2.

The ranging principle of the TOF sensor is as follows: the time of flight of the light in space is measured and converted into distance, so that the distance between the TOF sensor and the object can be measured. Typically, a TOF sensor includes a transmitting module and a receiving module. The emitting module may be an emitting element such as an LED or a laser, which will emit modulated infrared light of e.g. 850 nm. After the light emitted by the emitting module is reflected by an object, the reflected infrared light is received by the receiving module. Since both the light emitted by the TOF sensor and the received light are modulated waves, the TOF sensor can calculate the phase difference between the emitted light and the received light, and obtain the depth value through conversion, that is, the depth information of the TOF sensor and the object.

Therefore, the ultrasonic sensor, the TOF image sensor and the like can detect the position of a user, and then the position of the user is sent to the control module, so that the control module adjusts the air outlet angle of the air outlet module according to the position of the user. In particular, the detection module 30 may include two sensors with different angles, and the two sensors with different angles may be used to determine the position relationship between the user and the two sensors with different angles. By the two different sets of positional relationships, information such as the vertical distance and the offset angle between the user and the air cleaning device 20 can be calculated at the same time. It is to be understood that the detection module 30 is not limited to the above sensor, and may be a structured light image sensor or the like as long as it can detect depth information of an object.

Referring to fig. 11, when the user is located at the left side of the vertical symmetry plane P of the air outlet 213, the control module 40 controls the second blade 2431 of the second air guiding assembly 243 to rotate towards the left side, and when the user is located at the right side of the vertical symmetry plane P of the air outlet 213, the control module 40 controls the second blade 2431 of the second air guiding assembly 243 to rotate towards the right side. In this embodiment, the rotation angle of the second blade 2431 and the position of the user satisfy the following relationship: β ═ arctan (D2/D1), where β is a rotation angle of the second blade 2431 with respect to a vertical symmetry plane P of the air outlet 213, D1 is a horizontal distance between a plane where the air outlet 213 is located and a user, and D2 is a horizontal distance between a tip of the nose of the user and the vertical symmetry plane of the air outlet 213. In this embodiment, the control module 40 controls the second vane 2431 of the second air guiding assembly 243 to rotate towards the direction of the user, so that the airflow flowing speed at the position of the user can be faster, and the isolation effect of the oil smoke or the exhaust gas of the airflow wall can be enhanced. Meanwhile, when the air flow generated by the air purification device 20 is over against the body of the user, the oil smoke or waste gas isolation effect of the air flow wall is further enhanced.

Referring to fig. 12, when the detecting module 30 is further used for detecting the height of the user, the control module 40 adjusts the rotation angle of the first blade 2421 according to the height of the user to satisfy the following relationship: α ≦ arctan (D/(H2-H1+ H3)), where α is a rotation angle of the first blade 2421 relative to the plane where the air outlet 213 is located, D is a horizontal distance between the plane where the air outlet 213 is located and a user, H2 is a height of the air outlet 213 relative to the ground, H1 is a height of the user, and H3 is a height of the head of the user. The rotation angle of the first blade 2421 and the height of the user are satisfied: the relation of alpha ≦ arctan (D/(H2-H1+ H3)) aims to prevent discomfort to the user by blowing the airflow generated by the blower module below the user's neck, rather than directly against the face of the user. In addition, the arrangement mode can also effectively form an airflow wall between the head of the user and the range hood so as to effectively isolate the oil smoke generated in the cooking process from the head of the user.

Specifically, the control module 40 is connected to the first motor 2424 and the second motor 2434 of the air supply module 24. When the control module 40 receives the position and height of the user measured by the detection module 30, it controls the first motor 2424 to adjust the rotation angle of the first blade 2421 according to the height of the user, so that a wind wall is formed between the cooktop 200 and the head of the user to prevent oil smoke or exhaust gas generated by the cooktop 200 during operation from reaching the breathing zone of the user. At this time, the rotation angle of the first blade 2421 and the height of the user satisfy: α ≦ arctan (D/(H2-H1+ H3)), where α is a rotation angle of the first blade 2421 relative to the plane where the air outlet 213 is located, D is a horizontal distance between the plane where the air outlet 213 is located and a user, H2 is a height of the air outlet 213 relative to the ground, H1 is a height of the user, and H3 is a height of the head of the user. It can be understood that the included angle α cannot be set too small, so as to prevent the airflow generated by the air purification device 20 from directly blowing to the cooker 200, thereby affecting the fire distribution of the cooker 200, or blowing away the oil smoke generated by the cooker 200, so that the function of effectively isolating the oil smoke from the user cannot be realized. Typically, the angle α is set at an angle greater than 10 degrees. In addition, the rotation angle of the second blade 2431 and the position of the user satisfy the following relationship: β is arctan (D2/D1). The rotation angle of the second blade 2431 and the position relationship of the user can make the air flow generated by the air purifying device 20 directly face the body of the user, so as to enhance the isolation effect of the oil smoke or the waste gas of the air flow wall.

It can be understood that, when the number of users is two or more, the control module 40 controls the second blade 2431 of the second wind guide assembly 243 to swing left and right. By cyclically swinging the second blade 2431 left and right, the cooking process of a plurality of users can be made more comfortable.

Specifically, in this embodiment, when the horizontal distance between the air outlet and the user is 0.4m, and the height of the air outlet relative to the ground is 1.65m, the relationship between the included angle α and the height H1 of the user is shown in the following table:

H1＝1.4m

H1＝1.5m

H1＝1.6m

H1＝1.7m

H1＝1.8m

H1＝1.9m

included angle alpha

Less than 42 degree

Less than 48 degrees

Less than 55 degrees

Less than 64 degrees

Less than 74 degrees

Less than 85 DEG

In the actual use process, the included angle alpha can be adjusted along with the distance between the user and the air outlet and the specific conditions of actions of bending down, squatting and the like of the user.

It is to be understood that the manner of the rotational angle adjustment of the first blade 2421 is not limited to the above. The user has a breathing zone Y which is approximately a circle centered on the tip of the user's nose and having a radius of the distance between the tip and the chin. In practical use, the air flow generated by the air purification device 20 needs to avoid the breathing area Y as much as possible and to isolate the breathing area Y from the area where the cooking range 20 is located. In actual use, the plane in which the first blade 2421 is located is below or tangent to a circular region centered on the tip of the user's nose and having a radius of distance between the tip and the chin. Specifically, the position of the nose tip and the position of the chin of the user can be detected by the TOF sensor, and then a region where a circle with the nose tip of the user as a center and a distance between the nose tip and the chin as a radius is located is calculated. When there are a plurality of first blades 2421, the plane of the first blade 2421 with the highest position of the first rotating shaft 2422 and the tip of the nose of the user may be the center of the circle, and the distance between the tip of the nose and the chin may be below or tangent to the circular area with the radius. The plane of the first blade 2421, which is the highest position because the first rotating shaft 2422 is located, is tangent to the breathing zone. Therefore, the other first blades 2421 are located on the plane which is definitely outside the breathing region Y and at the bottom of the breathing region.

As required, when the distance between the user and the air purification apparatus 20 is greater than the preset distance, the control module 40 adjusts the function of the air outlet angle of the air supply module 24 to close according to the detection result of the detection module 30. When the distance between the user and the air purification device 20 is less than or equal to the preset distance, the control module 40 adjusts the function of the air outlet angle of the air supply module 24 to be turned on according to the detection result of the detection module 30. The above manner makes the control of the extractor hood 100 more intelligent. When the distance between the user and the air purification device 20 is greater than the preset distance, it indicates that the user is not ready to use the stove, and at this time, the air outlet angle of the air supply module 24 does not need to be adjusted according to the detection result of the detection module 30. When the distance between the user and the air cleaning device 20 is less than the preset distance, it indicates that the user is preparing to cook dishes or food, and the cooking process generates a large amount of oil smoke. At this time, the control module 40 automatically adjusts the air outlet angle of the air supply module 24 according to the detected human body parameters, so as to prevent the oil smoke generated in the cooking process from being transmitted to the breathing area of the user.

As required, when the distance between the user and the air purification apparatus 20 is greater than the preset distance, the control module 40 adjusts the function of the air outlet angle of the air supply module 24 to close according to the detection result of the detection module 30. At this time, an included angle between the air outlet angle of the air supply module 24 and the plane where the air outlet 213 is located is greater than 90 degrees and less than 180 degrees. Because the user is not ready to use the kitchen range, the angle between the air outlet angle of the air supply module 24 and the plane where the air outlet 213 is located is larger than 90 degrees and smaller than 180 degrees, so that the air purification device 20 works in a circulating air purification mode, air flow circulates in the kitchen, and residual waste gas and oil smoke in the kitchen are effectively taken away. When a user approaches the air purification device 20 and prepares for cooking, the air purification device 20 automatically switches from the circulating air purification mode to the blowing mode because the distance between the user and the air purification device 20 is less than a preset distance. At this time, the control module 40 adjusts the air outlet angle of the air supply module 24 according to the detection result of the detection module 30.

Another embodiment of the present invention further provides a control method of a range hood 100, where the range hood 100 includes a range hood body 10 and an air purification device 20 disposed on the range hood body 10. The air purification device 20 includes a housing 21,

air inlets

211, 212 and an air outlet 213 disposed on the housing 21, and an air duct communicating the

air inlets

211, 212 and the air outlet 213. A fan module 22 is disposed in the air duct, and is configured to enable air flow to enter the air duct from the

air inlets

211 and 212 and to be blown out from the air outlet 213. And an air supply module 24 is arranged at the air outlet 213. The air supply module 24 is used for adjusting an air outlet angle of the air purification device 20. As shown in fig. 13, the control method of the range hood 100 includes the following steps:

detecting a position of a user;

and adjusting the air outlet angle of the air supply module 24 according to the position of a user.

Specifically, the air supply module 24 further includes a first air guide assembly 242 and a second air guide assembly 243. The first wind guiding assembly 242 and the second wind guiding assembly 243 are disposed inside the wind channel and rotatably disposed at the wind outlet 213. The distance between the second air guiding assembly 243 and the air outlet 213 is greater than the distance between the first air guiding assembly 242 and the air outlet 213. The air flow in the air duct is transmitted to the first air guiding assembly 242 through the second air guiding assembly 243. The air outlet angle of the air supply module 24 and the position of a user satisfy the following relation: β ═ arctan (D2/D1), where β is a rotation angle of the second blade 2431 of the two air guiding assemblies 243 relative to a vertical symmetry plane of the air outlet 213, D1 is a horizontal distance between a plane where the air outlet 213 is located and a user, and D2 is a horizontal distance between a tip of the nose of the user and the vertical symmetry plane P of the air outlet 213. The second blade 2431 is rotated at an angle relative to the user's position to set: the purpose of β (D2/D1) is to make the air flow generated by the air purification device 20 directly face the body of the user, so as to enhance the isolation effect of the oil smoke or the exhaust gas from the air flow wall.

It is understood that the control method further comprises the steps of:

detecting the height of a user;

the rotation angle of the first blade 2421 of the first wind guiding assembly 242 is adjusted according to the height of the user.

The above arrangement forms an airflow wall between the head of the user and the range hood 100 to prevent the user from breathing the oil smoke or waste gas generated during the cooking process.

In this embodiment, the height of the user and the rotation angle of the first blade 2421 of the first wind guiding assembly 242 satisfy the following relationship: α ≦ arctan (D1/(H2-H1+ H3)), where α is a rotation angle of the first blade 2421 with respect to the plane where the air outlet 213 is located, D1 is a horizontal distance between the plane where the air outlet 213 is located and a user, H2 is a height of the air outlet 213 with respect to the ground, H1 is a height of the user, and H3 is a height of the head of the user. The arrangement mode can enable the air flow generated by the air supply module 24 to be blown to the lower part of the neck of the user instead of being blown directly opposite to the face of the user, so that discomfort of the user is avoided. In addition, the arrangement mode can also effectively form an airflow wall between the head of the user and the range hood 100 so as to effectively isolate the oil smoke generated in the cooking process from the head of the user.

If necessary, before detecting the body parameters of the user, it may be detected whether the user is within the preset area, as shown in fig. 14. If the user is not in the predetermined area, i.e. the distance between the user and the air cleaning device 20 is greater than the predetermined distance, indicating that the user is not ready to use the range, then the air cleaning device 20 is operated in the circulating air cleaning mode. The air supply module 24 blows air upwards in an inclined mode, and the function of adjusting the air outlet angle of the air supply module 24 according to the position of a user is closed. The air outlet angle of the air supply module 24 is fixed. When the distance between the user and the air purification device 20 is less than or equal to the preset distance, it indicates that the user is ready to use the stove, and at this time, the air purification device 20 is operated in the air supply mode. The air supply module 24 discharges air downwards in an inclined mode, and the function of adjusting the air discharge angle of the air supply module 24 according to the position of a user is started.

Fig. 15 is a schematic diagram of a hardware operating environment of the terminal 50 according to an embodiment of the present invention. The terminal 50 may include: a processor 51, e.g. a CPU, a network interface 54, a user interface 53, a memory 55, a communication bus 52. Wherein a communication bus 52 is used to enable the connection communication between these components. The user interface 53 may comprise a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 53 may also comprise a standard wired interface, a wireless interface. The network interface 54 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 55 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 55 may alternatively be a storage device separate from the processor 51 described above. The memory 55 stores a control program of the range hood 100.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A range hood is characterized by comprising a range hood body and an air purification device arranged on the range hood body, the air purification device comprises a shell, an air inlet and an air outlet which are arranged on the shell, and an air duct communicating the air inlet and the air outlet, a fan module is arranged in the air duct, the air duct is used for enabling air flow to enter the air duct from the air inlet and blow out from the air outlet, an air supply module is arranged at the air outlet, the air supply module is used for adjusting the air outlet angle of the air purification device, the range hood also comprises a detection module and a control module, the detection module is used for detecting the position of a user and sending the detection result to the control module, the control module is used for adjusting the air outlet angle of the air supply module according to the detection result of the detection module.

2. The range hood of claim 1, wherein the air supply module includes a first air guide assembly, the first air guide assembly is disposed inside the air duct and rotatably disposed at the air outlet, and an air flow inside the air duct is blown out to the outside through the first air guide assembly.

3. The range hood of claim 2, wherein the first air guiding assembly includes a first blade and a first motor, the first motor is connected to the rotating shaft of the first blade to drive the first blade to rotate, and the rotating shaft of the first blade is parallel to the ground to adjust the air outlet angle of the air supply module.

4. The range hood of claim 3, wherein the air supply module further comprises a second air guide assembly, the second air guide assembly is disposed within the air duct and rotatably disposed at the air outlet, a distance between the second air guide assembly and the air outlet is greater than a distance between the first air guide assembly and the air outlet, and the air flow in the air duct is transmitted to the first air guide assembly through the second air guide assembly.

5. The range hood of claim 4, wherein the second wind guide assembly includes a second blade and a second motor, the second motor is connected to the rotating shaft of the second blade to drive the second blade to rotate, and the rotating shaft of the second blade is perpendicular to the ground to adjust the wind outlet angle of the wind supply module in the left-right direction.

6. The range hood of claim 5, wherein the control module controls the second blade of the second wind guiding assembly to rotate in a left direction when the user is located at the left side of the vertical symmetry plane of the air outlet, and controls the second blade of the second wind guiding assembly to rotate in a right direction when the user is located at the right side of the vertical symmetry plane of the air outlet.

7. The range hood of claim 6, wherein the rotation angle of the second blade and the position of the user satisfy the following relationship: β ═ arctan (D2/D1), where β is the rotation angle of the second blade relative to the vertical plane of symmetry of the outlet, D1 is the horizontal distance between the plane of the outlet and the user, and D2 is the horizontal distance between the tip of the user's nose and the vertical plane of symmetry of the outlet.

8. The range hood of claim 6, wherein the control module controls the second blade of the second wind guide assembly to swing left and right when the number of users is two or more.

9. The range hood according to any one of claims 6 to 8, wherein the detection module is further configured to detect a height of a user, and the control module adjusts a rotation angle of the first blade according to the height of the user to satisfy the following relationship: alpha is less than or equal to arctan (D1/(H2-H1+ H3)), wherein alpha is a rotation angle of the first blade relative to a plane where the air outlet is located, D1 is a horizontal distance between the plane where the air outlet is located and a user, H2 is the height of the air outlet relative to the ground, H1 is the height of the user, and H3 is the height of the head of the user.

10. The range hood of claim 7, wherein when the horizontal distance between the plane of the air outlet and the user is greater than a predetermined distance, the control module turns off the function of adjusting the air outlet angle of the air supply module according to the detection result of the detection module, and when the distance between the user and the air purification device is less than or equal to the predetermined distance, the control module turns on the function of adjusting the air outlet angle of the air supply module according to the detection result of the detection module.

11. The range hood according to claim 10, wherein when a distance between a user and the air cleaning device is greater than a predetermined distance, a rotation angle of the second blade with respect to a vertical symmetry plane of the air outlet is 0 degree, and a rotation angle of the first blade with respect to a plane in which the air outlet is located is greater than 90 degrees and less than 180 degrees.

12. The range hood of claim 1, wherein the detection module comprises one or more of an ultrasonic sensor, a TOF image sensor, and a structured light image sensor.

13. A control method of a range hood comprises a range hood body and an air purification device arranged on the range hood body, wherein the air purification device comprises a shell, an air inlet and an air outlet which are arranged on the shell, and an air channel communicated with the air inlet and the air outlet, a fan module is arranged in the air channel and used for enabling air flow to enter the air channel from the air inlet and blow out from the air outlet, an air supply module is arranged at the air outlet and used for adjusting the air outlet angle of the air purification device, and the control method is characterized by comprising the following steps:

detecting a position of a user;

14. The control method of the range hood according to claim 13, wherein the air supply module further includes a first air guide assembly and a second air guide assembly, the first air guide assembly and the second air guide assembly are disposed inside the air duct and rotatably disposed at the air outlet, a distance between the second air guide assembly and the air outlet is greater than a distance between the first air guide assembly and the air outlet, the air flow inside the air duct is transmitted to the first air guide assembly through the second air guide assembly, and an air outlet angle of the air supply module and a position of a user satisfy the following relationship: β ═ arctan (D2/D1), where β is a rotation angle of the second blades of the two air guiding assemblies with respect to a vertical symmetry plane of the air outlet, D1 is a horizontal distance between a plane where the air outlet is located and a user, and D2 is a horizontal distance between a tip of the nose of the user and the vertical symmetry plane of the air outlet.

15. The control method of a range hood according to claim 14, further comprising the steps of:

detecting the height of a user;

16. The control method of a range hood according to claim 15, wherein the height of the user and the rotation angle of the first blade of the first air guiding assembly satisfy the following relationship: alpha is less than or equal to arctan (D1/(H2-H1+ H3)), wherein alpha is a rotation angle of the first blade relative to a plane where the air outlet is located, D1 is a horizontal distance between the plane where the air outlet is located and a user, H2 is the height of the air outlet relative to the ground, H1 is the height of the user, and H3 is the height of the head of the user.

17. A computer-readable storage medium for storing a control program of a range hood, the control program of the range hood, when executed by a processor, implementing the control method of the range hood as set forth in any one of claims 13 to 16.