Range hood and control method thereof

Abstract

The application discloses an extractor hood and a control method thereof, and belongs to the technical field of household appliances. The extractor hood is designed to solve the problem that the existing extractor hood is difficult to quickly collect and discharge oil fume. The extractor hood comprises a smoke baffle, a smoke collecting cavity, an oil fume detector and a driving assembly. The bottom of the smoke collecting cavity is provided with an opening, the smoke baffle is arranged at the bottom of the smoke collecting cavity and forms an air inlet between the side of the opening and the smoke baffle, the oil fume detector is used for detecting the oil fume concentration in the smoke collecting cavity, and the driving assembly is connected to the smoke baffle and can drive the smoke baffle to move in one direction or two or more directions in a plane. The extractor hood and the control method thereof can make the smoke baffle move in one direction or two directions according to the change of the oil fume concentration, so as to change the air inlet area of the air inlet, change the air volume distribution, ensure that the suction negative pressure at the position with high oil fume concentration is also stronger, fully utilize the air volume of the extractor hood, improve the efficiency of the extractor hood, make the extraction of the oil fume more thorough, and improve the use experience.

Description

TECHNICAL FIELD

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

[0002] The range hood mainly comprises a fan, a machine box, a smoke collecting hood and a smoke baffle, the fan is arranged in the machine box and can form a negative pressure in the machine box, the smoke collecting hood is arranged below the machine box, and the smoke baffle is arranged at an opening of the smoke collecting hood, an air inlet is formed between a rim of the smoke baffle and a rim of the opening of the smoke collecting hood, indoor oil fume enters the smoke collecting hood and the machine box through the air inlet under the action of the negative pressure, so as to realize the collection and discharge of the oil fume.

[0003] The gas stove usually comprises two burners, and can be used for cooking two pots at the same time. When only one side burner is in use or the two pots perform cooking methods that can produce different amounts of oil fume, the oil fume concentration at different side edges of the smoke baffle is different, and the required negative pressure is also different. A range hood with a smoke baffle capable of moving left and right is provided, when only the left side burner or the oil fume of the left side pot is greater than that of the right side pot, the smoke baffle moves to the right side, so that a greater negative pressure is obtained at the left side burner of the gas stove; similarly, when only the right side burner or the oil fume of the right side pot is greater than that of the left side pot, the smoke baffle moves to the left side, so that a greater negative pressure is obtained at the right side burner of the gas stove.

[0004] The defects of the existing range hood include: only the left and right translation of the smoke baffle can change the areas of the left and right air inlets, when the oil fume is more concentrated on the front side or the rear side, the method of only changing the areas of the left and right air inlets is difficult to quickly collect and discharge the oil fume, and the oil fume cleaning effect is poor. SUMMARY

[0005] The purpose of the present application is to provide a range hood and a control method thereof, which solves the problem that the existing range hood is difficult to quickly collect and discharge oil fume, and the oil fume cleaning effect is good.

[0006] To achieve this purpose, on the one hand, the present application adopts the following technical solutions:

[0007] The range hood comprises: a smoke baffle; a smoke collecting cavity, an opening is formed in the bottom of the smoke collecting cavity, and the smoke baffle is arranged at the bottom of the smoke collecting cavity and forms an air inlet between the side edge of the opening; an oil fume detector for detecting the oil fume concentration in the smoke collecting cavity; and a driving assembly connected to the smoke baffle, the driving assembly can drive the smoke baffle to move in one direction or two or more directions in a plane.

[0008] In one preferred embodiment, the driving assembly comprises a driving device, a push-pull rod and a bracket, one end of the push-pull rod is connected to the output end of the driving device, the other end of the push-pull rod is connected to the bracket, and the bracket is fixedly connected to the smoke baffle.

[0009] In one preferred embodiment, the range hood comprises four sets of driving assemblies, the supports of the four sets of driving assemblies are fixedly connected to the four corners of the smoke baffle respectively, and the driving devices of the four sets of driving assemblies are symmetrically connected to the smoke collecting cavity.

[0010] In one preferred embodiment, the range hood further comprises a camera and a control system connected thereto, which can determine whether the gas stove is working as a single stove or a double stove by taking photos and / or videos; or, the range hood further comprises a control system, which can receive working state signals from the gas stove and determine whether the gas stove is working as a single stove or a double stove according to the number of the working state signals; or, the range hood further comprises an infrared sensor and a control system connected thereto, which can remotely measure the temperature of the pot and determine whether the gas stove is working as a single stove or a double stove according to the temperature of the pot.

[0011] In another aspect, the present application adopts the following technical solutions:

[0012] The range hood control method monitors the oil fume concentration in real time, moves the smoke baffle in one direction or two directions according to the change of the oil fume concentration, changes the air inlet area of at least two air inlets, and improves the speed of the oil fume entering the air inlets.

[0013] In one preferred embodiment, the smoke baffle comprises four side edges, four air inlets are formed between the smoke baffle and the side edges of the smoke collecting cavity opening, and the oil fume concentration is monitored in real time for each air inlet.

[0014] In one preferred embodiment, at least twelve oil fume concentration monitoring points c are evenly arranged around all the air inlets, and at least every three oil fume concentration monitoring points c form a group.

[0015] In one preferred embodiment, all the oil fume concentration monitoring points c in each group are used to detect the oil fume concentration of at least two air inlets.

[0016] In one preferred embodiment, the range hood control method comprises the following steps:

[0017] Step S1, starting the range hood;

[0018] Step S2, determining whether the smoke baffle is located at the initial position; if yes, turning to step S3, otherwise resetting and determining again whether the smoke baffle is located at the initial position;

[0019] Step S3, identifying the use of the cooking bench, if the gas stove is used as a double stove, the position of the smoke baffle remains unchanged, and if the gas stove is used as a single stove, the oil fume concentration is detected;

[0020] Step S4, the oil fume concentration of the three oil fume concentration monitoring points c in the group where the highest value of the oil fume concentration is located is marked as Cmax, Cmid and Cmin from high to low, and the moving distance of the smoke baffle in one direction or the moving distance of the smoke baffle in two directions is determined according to the relationship among Cmax, Cmid and Cmin;

[0021] Step S5, the oil fume concentration is detected again, and it is judged whether the oil fume concentration changes, if yes, the process goes to step S3, otherwise, the current state is kept until the range hood stops working and the smoke baffle is reset.

[0022] In one preferred embodiment, the specific scheme for determining the movement of the smoke baffle according to the relationship among Cmax, Cmid and Cmin in step S4 is as follows: when Cmax>Cmid>Cmin, the smoke baffle moves to the direction of the side where Cmin is located by half of the width value or moves to the direction of each of the two adjacent sides of the corner where Cmin is located by half of the width value; when Cmax=Cmax>Cmin, the smoke baffle moves to the direction of the side where Cmin is located by half of the width value or moves to the direction of each of the two adjacent sides of the corner where Cmin is located by half of the width value; when Cmax>Cmin=Cmin, the smoke baffle moves to the opposite direction of the side where Cmax is located by half of the width value or moves to the opposite direction of each of the two adjacent sides of the corner where Cmax is located by half of the width value; when Cmax=Cmax=Cmax, the smoke baffle keeps the initial position unchanged.

[0023] The range hood disclosed by the application comprises a smoke baffle, a smoke collecting cavity, an oil fume detector and a driving assembly, and can move the smoke baffle in one direction or two directions according to the change of the oil fume concentration to change the air inlet area of the air inlet, thereby changing the air volume distribution, ensuring that the suction negative pressure at the position where the oil fume concentration is high is also stronger, fully utilizing the air volume of the range hood, improving the efficiency of the range hood, and making the oil fume suction more thorough and the use experience better.

[0024] The range hood control method disclosed by the application moves the smoke baffle according to the change of the oil fume concentration to change the air inlet area of at least two air inlets, the air inlet area of the air inlet at the position where the oil fume concentration is higher is larger, the suction negative pressure acts more on the air inlet, and the oil fume can be sucked into the range hood more quickly; the air inlet area of the air inlet at the position where the oil fume concentration is lower is small, avoiding the waste of the suction negative pressure and improving the efficiency of the oil fume suction. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic diagram of the range hood provided by the embodiment of the application;

[0026] Figure 2 is one of the combined structural schematic diagrams of the smoke baffle, the smoke collecting cavity and the driving assembly provided by the embodiment of the application;

[0027] Figure 3is Figure 2 a local enlarged view of the middle A;

[0028] Figure 4 is a combined structure schematic view of the smoke baffle, the smoke collecting cavity and the driving assembly provided by the embodiment of the present application;

[0029] Figure 5 is Figure 4 a local enlarged view of the middle B;

[0030] Figure 6 is a structure schematic view of the driving assembly provided by the embodiment of the present application;

[0031] Figure 7 is a bottom view of the extractor hood provided by the embodiment of the present application;

[0032] Figure 8 is a width schematic view of the air inlet provided by the embodiment of the present application;

[0033] Figure 9 is a bottom view of one example of the extractor hood provided by the embodiment of the present application;

[0034] Figure 10 is a bottom view of another example of the extractor hood provided by the embodiment of the present application;

[0035] Figure 11 is a bottom view of still another example of the extractor hood provided by the embodiment of the present application;

[0036] Figure 12 is a flow chart of the control method of the extractor hood provided by the embodiment of the present application.

[0037] in the figure:

[0038] 1, smoke baffle; 2, smoke collecting cavity; 3, oil fume detector; 4, driving assembly; 21, air inlet; 41, driving device; 42, push-pull rod; 43, support. DETAILED DESCRIPTION

[0039] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0040] In the description of the application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0041] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0042] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0044] It is to be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0045] The present embodiment discloses an extractor hood and a control method thereof, such as Figures 1 to 5 As shown in the drawings, the extractor hood comprises a baffle 1, a smoke collecting cavity 2, a smoke detector 3 and a driving assembly 4. The bottom of the smoke collecting cavity 2 is provided with an opening, and the baffle 1 is arranged at the bottom of the smoke collecting cavity 2 and forms an air inlet 21 between the baffle 1 and the side of the opening. The specific arrangement position of the smoke detector 3 is not limited, and it can detect the oil fume concentration within the smoke collecting cavity 2. The driving assembly 4 is connected to the baffle 1.

[0046] The driving assembly 4 can drive the baffle 1 to move in one direction or two or more directions in the plane. The control method of the extractor hood is to monitor the oil fume concentration in real time, and make the baffle 1 move in one direction or two directions according to the change of the oil fume concentration, so as to change the air inlet area of at least two air inlets 21 and improve the speed of oil fume entering the air inlets 21. Specifically, the air inlet area of the air inlet 21 at the position with higher oil fume concentration is larger, and the suction negative pressure will act more on the air inlet 21, so that the oil fume can be sucked into the hood more quickly. The air inlet area of the air inlet 21 at the position with lower oil fume concentration is small, which avoids wasting the suction negative pressure and improves the oil fume extraction efficiency.

[0047] The extractor hood changes the air inlet area of the air inlet 21 to change the air volume distribution, ensures that the suction negative pressure at the position with high oil fume concentration is also stronger, fully utilizes the oil fume extraction air volume, improves the oil fume extraction efficiency, and makes the oil fume extraction more complete and the use experience better.

[0048] The specific structure of the driving assembly 4 is not limited, and it can only translate the baffle 1. In the present embodiment, as shown in Figure 5 and Figure 6 The driving assembly 4 comprises a driving device 41, a push-pull rod 42 and a bracket 43. One end of the push-pull rod 42 is connected to the output end of the driving device 41, the other end of the push-pull rod 42 is connected to the bracket 43, and the bracket 43 is fixedly connected to the baffle 1.

[0049] The output end of the driving device 41 can control the push-pull rod 42 to push out or retract, and the push-pull rod 42 controls the moving direction and moving distance of the baffle 1 through the bracket 43, which is more convenient to use, the position of the baffle 1 is more accurately controlled, and the oil fume extraction effect is good.

[0050] In order to make the smoke baffle 1 move more stably, in the embodiment, the range hood comprises four groups of driving assemblies 4, the supports 43 of the four groups of driving assemblies 4 are fixedly connected to the four corners of the smoke baffle 1 respectively, so that the four corners of the smoke baffle 1 can be effectively supported, and the smoke baffle 1 is prevented from being inclined due to uneven force.

[0051] The driving devices 41 of the four groups of driving assemblies 4 are symmetrically connected to the smoke collecting cavity 2, the smoke collecting cavity 2 can provide stable support for the driving devices 41, and the space in the smoke collecting cavity 2 can be fully utilized, and the overall structure is more reasonable. In order to avoid movement jamming, the driving device 41 is hingedly connected to the smoke collecting cavity 2, the driving device 41 can swing around the hinge point, so that the smoke baffle 1 can move in a larger range, and can meet the use requirements of various oil fume distribution conditions.

[0052] The gas stove usually comprises two burners, and the oil fume distribution is certainly different when a single burner is used and when both burners are used. The method for judging whether the gas stove is in a single burner use state or a double burner use state is known in the prior art. In the embodiment, the range hood of one structure further comprises a camera and a control system connected to each other. The camera can take photos and / or videos, the photos and / or videos are sent to the control system, and an image analysis module in the control system can judge whether the gas stove is in a single burner use state or a double burner use state according to the content of the photos and / or videos. Specifically, when there is oil fume rising upward on both sides, it can be judged that the gas stove is in a double burner use state; when there is oil fume rising upward on only one side, and there is no oil fume in the pot on the other side, or even no pot and the burner can be photographed, it can be judged that the gas stove is in a single burner use state. It can be understood that the specific content and working principle of the image analysis module are not limited, and the technology for analyzing the content of the image in the prior art can be used.

[0053] The range hood of another structure further comprises a control system, and a signal emitting device is arranged on each burner of the gas stove. After the burner is ignited, the signal emitting device can emit a signal, and the control system can receive the signal. When only one signal can be received, it is judged that the gas stove is in a single burner use state; when two signals can be received by the control system, it is judged that the gas stove is in a double burner use state. It can be understood that the specific structure of the signal emitting device is not limited, and all devices capable of detecting whether the burner of the gas stove is ignited and burning and emitting a signal in the prior art can be used.

[0054] Another structure of the range hood further comprises an infrared sensor and a control system connected to each other. The infrared sensor can remotely measure the temperature of the pot and send the temperature value to the control system. The control system has a preset reference temperature (which can be, but is not limited to, 50℃, 55℃, 60℃, 65℃, 70℃, 75℃ and 80℃). When the measured value of the infrared sensor is higher than the reference temperature, it is determined that the side burner is in use. The range hood can be provided with two infrared sensors, each of which is used to measure the temperature of the pot on one side burner; or a rotatable infrared sensor can be provided, and the orientation of the infrared sensor can be adjusted by changing the rotation angle of the infrared sensor, so that one infrared sensor measures two side burners to determine whether the gas stove works as a single burner or a double burner.

[0055] In the embodiment, the control system can be a centralized or distributed controller. For example, the controller can be a single microcontroller or a plurality of microcontrollers distributedly arranged. The microcontroller can run a control program to control the camera, the infrared sensor, the oil fume detector 3, the driving device 41 and other devices to realize their functions.

[0056] On the basis of the above structure, the rectangular smoke baffle 1 includes four sides, and four air inlets 21 are formed between the smoke baffle 1 and the sides of the opening of the smoke collecting cavity 2. In order to make full use of the suction negative pressure, the oil fume detectors 3 are distributed around the four air inlets 21 to monitor the oil fume concentration of each air inlet 21 in real time.

[0057] As shown in Figure 7 At least twelve oil fume concentration monitoring points c are uniformly arranged around all the air inlets 21, and one oil fume detector 3 is arranged at each oil fume concentration monitoring point c. At least every three oil fume concentration monitoring points c form a group. Specifically, the first group L1 includes c1, c5 and c9; the second group L2 includes c2, c6 and c10; the third group L3 includes c3, c7 and c11; and the fourth group L4 includes c4, c8 and c12.

[0058] As shown in Figure 8 The air inlets 21 are long and narrow rectangles, and the main indicator affecting the air volume (suction negative pressure) is the width value. When the smoke baffle 1 is in the initial position, the air inlets 21 located on the front side and the rear side are equal in width, both being d1; and the air inlets 21 located on the left side and the right side are equal in width, both being d2. When the user stands facing the range hood, the “front side” is the side close to the user, the “rear side” is the side away from the user, the “left side” is the left side of the user, and the “right side” is the right side of the user.

[0059] In order to improve the accuracy of the measurement, all of the oil fume concentration monitoring points c in each group are used to detect the oil fume concentration of at least two air inlets 21. That is, all of the oil fume concentration monitoring points c in each group cannot be located at the side of the same air inlet 21. When a single cooker is used, the cooking oil fume rises upward, most of the oil fume flow moves along the smoke baffle 1 and then enters the smoke collecting cavity 2 through the air inlet 21, and a small part of the oil fume flow will escape outward. The oil fume detector 3 arranged at the edge of the air inlet 21 can accurately measure the amount of oil fume escaping at each position, and the suction negative pressure at the position where the escaping oil fume is relatively concentrated can be increased to reduce the amount of escaping oil fume and improve the oil fume suction efficiency.

[0060] As shown in Figure 12 The oil fume extractor control method includes the following steps:

[0061] After the oil fume extractor is started, the control system determines whether the smoke baffle 1 is located at the initial position; if yes, it goes to the next step, otherwise the power device works back to the initial position and determines again whether the smoke baffle 1 is located at the initial position.

[0062] The use of the cooktop is identified. If the gas stove is used by two cookers at the same time, the position of the smoke baffle 1 remains unchanged, and if the gas stove is used by a single cooker, the oil fume concentration of each oil fume concentration monitoring point c is monitored, and the point with the highest oil fume concentration is marked as Cmax.

[0063] The group Lx (x is 1, 2, 3 or 4) where the highest oil fume concentration Cmax is located is singled out, and the oil fume concentrations of the three oil fume concentration monitoring points c in the group Lx are marked as Cmax, Cmid and Cmin from high to low according to the relationship between Cmax, Cmid and Cmin. The smoke baffle 1 is determined to move a set distance in one direction or a set distance in two directions. It can be understood that Cmax represents the maximum value of the three values, Cmid represents the middle value of the three values, and Cmin represents the minimum value of the three values. When two of the three values are the same, there is no Cmid, and at this time, there are two Cmax or two Cmin in the three values. There is another special case when the three values are the same, and there are only three Cmax or three Cmin. In this embodiment, three Cmax are used to represent the case where the three values are the same.

[0064] Specifically, when Cmax > Cmid > Cmin (all three values ​​are different), the smoke baffle 1 moves half the width value towards the side where Cmin is located, or moves half the width value towards each of the two adjacent sides of the corner where Cmin is located; when Cmax = Cmax > Cmin (two of the three values ​​are the same, and both of these values ​​are greater than the third value), the smoke baffle 1 moves half the width value towards the side where Cmin is located, or moves half the width value towards each of the two adjacent sides of the corner where Cmin is located; when Cmax > Cmin = Cmin (two of the three values ​​are the same, and both of these values ​​are less than the third value), the smoke baffle 1 moves half the width value in the opposite direction of the side where Cmax is located, or moves half the width value in the opposite direction of the two adjacent sides of the corner where Cmax is located; when Cmax = Cmax = Cmax (all three values ​​are the same), the smoke baffle 1 remains in its initial position.

[0065] For example, such as Figure 8 and Figure 9 As shown, among all twelve oil fume concentration monitoring points c, the oil fume concentration at monitoring point c9 is the highest. Monitoring point c9 belongs to the first group L1. Therefore, the oil fume concentrations of the three monitoring points c in the first group L1 need to be sorted, resulting in: oil fume concentration at monitoring point c9 > oil fume concentration at monitoring point c5 > oil fume concentration at monitoring point c1. The smoke baffle 1 moves dx / 2 to each of the two adjacent sides of monitoring point c1, that is, towards the air inlet 21 on the front side (…). Figure 9 The air inlet 21 located above moves d1 / 2 in the direction of the air inlet 21, and at the same time moves d2 / 2 in the direction of the air inlet 21 to the left, thereby increasing the air intake area of ​​the oil fume concentration monitoring point c9.

[0066] For example, such as Figure 8 and Figure 10 As shown, among all twelve oil fume concentration monitoring points c, the oil fume concentration of monitoring point c2 is the highest. Monitoring point c2 belongs to the second group L2, so it is necessary to sort the oil fume concentrations of the three oil fume concentration monitoring points c in the second group L2 to obtain the oil fume concentration of monitoring point c2 = oil fume concentration of monitoring point c10 > oil fume concentration of monitoring point c6. The smoke baffle 1 moves dx / 2 towards the oil fume concentration monitoring point c6, that is, moves d2 / 2 towards the right air inlet 21, increasing the air inlet area of ​​oil fume concentration monitoring points c2 and c10.

[0067] For example, such as Figure 8 and Figure 11As shown, the oil fume concentration monitoring point c8 has the highest oil fume concentration among the twelve oil fume concentration monitoring points c, and the oil fume concentration monitoring point c8 belongs to the fourth group L4, so the oil fume concentrations of the three oil fume concentration monitoring points c in the fourth group L4 need to be sorted, and the oil fume concentration monitoring point c8 has the highest oil fume concentration, the oil fume concentration monitoring point c4 has the same oil fume concentration as the oil fume concentration monitoring point c12, the baffle 1 moves dx / 2 to the side where the oil fume concentration monitoring point c4 and the oil fume concentration monitoring point c12 are located, that is, moves d1 / 2 to the direction of the upper air inlet 21 and moves d2 / 2 to the direction of the left air inlet 21, thereby increasing the air inlet area of the oil fume concentration monitoring point c8.

[0068] For another example, among the twelve oil fume concentration monitoring points c, the oil fume concentration monitoring point c11 has the highest oil fume concentration, and the oil fume concentration monitoring point c11 belongs to the third group L3, so the oil fume concentrations of the three oil fume concentration monitoring points c in the third group L3 need to be sorted, and the oil fume concentration monitoring point c3 has the same oil fume concentration as the oil fume concentration monitoring point c7 and the oil fume concentration monitoring point c11, the baffle 1 remains unchanged in the initial position, and the air inlet area of each oil fume concentration monitoring point remains unchanged.

[0069] In the end of the range hood control method, the oil fume concentration is detected again, and it is determined whether the oil fume concentration changes, if yes, the use condition of the cooking bench is re-identified, and if not, the current state is maintained until the range hood stops working and the baffle 1 is reset.

[0070] Note that the above is only a preferred embodiment of the present application and the technical principle used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A range hood control method, applied to a range hood, characterized in that, The range hood includes: Smoke baffle (1); The smoke collection chamber (2) has an opening at its bottom. The smoke baffle (1) is located at the bottom of the smoke collection chamber (2) and forms an air inlet (21) between it and the side of the opening. Oil fume detector (3) is used to detect the oil fume concentration within the smoke collection range of the smoke collection chamber (2); and, The drive assembly (4) is connected to the smoke baffle (1), and the drive assembly (4) can drive the smoke baffle (1) to move in four directions (up, down, left, and right) in the plane; The range hood control method is as follows: real-time monitoring of oil fume concentration, and according to the change of oil fume concentration, the baffle plate (1) is moved in one direction or two directions to change the air intake area of ​​at least two air inlets (21) and increase the speed at which oil fume enters the air inlet (21). The smoke baffle (1) includes four sides, and four air inlets (21) are formed between the smoke baffle (1) and the side of the opening of the smoke collection chamber (2). At least twelve oil fume concentration monitoring points c are evenly arranged around all the air inlets (21), and at least three oil fume concentration monitoring points c are grouped together. The oil fume concentration is monitored in real time for each air inlet (21). The range hood control method includes the following steps: Step S1, start the range hood; Step S2: Determine whether the smoke baffle (1) is in the initial position; if yes, proceed to step S3; otherwise, reset and determine whether the smoke baffle (1) is in the initial position again. Step S3: Identify the usage status of the stove. If the gas stove is used with two burners at the same time, the position of the smoke baffle (1) remains unchanged. If the gas stove is used with a single burner, the oil fume concentration is detected. Step S4: Mark the oil fume concentrations of the three oil fume concentration monitoring points c in the group with the highest oil fume concentration from high to low as Cmax, Cmid, and Cmin. Determine whether the smoke baffle (1) moves a set distance in one direction or in two directions based on the relationship between Cmax, Cmid, and Cmin. The specific plan for moving the smoke baffle (1) in step S4 based on the relationship between Cmax, Cmid, and Cmin is as follows: When Cmax > Cmid > Cmin, the smoke baffle (1) moves half the width value in the direction of the side where Cmin is located or moves half the width value in the direction of the two adjacent sides of the corner where Cmin is located. When Cmax = Cmax > Cmin, the smoke baffle (1) moves half the width value in the direction of the side where Cmin is located or moves half the width value in the direction of the two adjacent sides of the corner where Cmin is located. When Cmax > Cmin = Cmin, the smoke baffle (1) moves half the width value in the opposite direction of the side where Cmax is located or moves half the width value in the opposite direction of the two adjacent sides of the corner where Cmax is located. When Cmax=Cmax=Cmax, the smoke baffle (1) remains in its initial position. Step S5: Detect the oil fume concentration again to determine if the oil fume concentration has changed. If yes, proceed to step S3; otherwise, maintain the current state until the range hood stops working and the smoke baffle (1) is reset.

2. The range hood control method according to claim 1, characterized in that, The drive assembly (4) includes a drive device (41), a push-pull rod (42) and a bracket (43). One end of the push-pull rod (42) is connected to the output end of the drive device (41), and the other end of the push-pull rod (42) is connected to the bracket (43). The bracket (43) is fixedly connected to the smoke baffle (1).

3. The range hood control method according to claim 2, characterized in that, The range hood includes four sets of drive components (4), the brackets (43) of the four sets of drive components (4) are respectively fixedly connected to the four corners of the smoke baffle (1), and the drive devices (41) of the four sets of drive components (4) are symmetrically connected to the smoke collection chamber (2).

4. The range hood control method according to any one of claims 1 to 3, characterized in that, The range hood also includes a connected camera and control system, which can determine whether the gas stove is operating as a single burner or a dual burner by taking photos and / or videos; or... The range hood also includes a control system, which can receive operating status signals from the gas stove and determine whether the gas stove is operating as a single burner or dual burners based on the number of operating status signals; or... The range hood also includes a connected infrared sensor and control system, which can remotely measure the temperature of the cookware and determine whether the gas stove is operating as a single burner or a dual burner based on the cookware temperature.

5. The range hood control method according to claim 1, characterized in that, All of the oil fume concentration monitoring points c in each group are used to detect the oil fume concentration at at least two of the air inlets (21).

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