Range hood control method and range hood

Abstract

The invention relates to the technical field of kitchen appliances, and discloses a range hood control method and a range hood, the range hood comprises an exhaust fume collecting hood and an adjusting plate movably arranged on the exhaust fume collecting hood, and an exhaust fume suction port is formed in the exhaust fume collecting hood. The range hood control method comprises the steps that after a range hood is started, the oil smoke concentration in a preset area on the periphery of a smoke suction opening is detected; judging whether a lampblack escape condition exists in the preset area according to the lampblack concentration; if yes, determining an oil fume escape position according to the oil fume concentration, and controlling the adjusting plate to move according to the determined oil fume escape position so as to adjust the fume inlet position and / or fume inlet area of the fume suction port. According to the range hood control method, the smoke inlet position of the smoke suction port and / or the smoke inlet area of the smoke suction port can be dynamically adjusted according to the oil smoke concentration and the oil smoke escape position, so that the negative pressure area where the smoke suction port is located is concentrated in the area with the high oil smoke concentration, the oil smoke suction efficiency is improved, efficient smoke exhaust of the range hood is achieved, and the use experience feeling of a user is improved.

Description

TECHNICAL FIELD

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

[0002] A range hood is an indispensable device in a kitchen, and its main function is to capture oil fume, particulate matter and harmful gas generated during cooking to protect indoor air quality and user health.

[0003] In actual use, the amount of oil fume and the diffusion speed of oil fume generated by different cooking methods (such as stir-frying, frying, steaming, etc.) are obviously different, so that the concentrated position of oil fume in the space above the cooking range also changes, resulting in uneven distribution of oil fume concentration.

[0004] The existing range hood usually adopts a structure design of a reversible smoke baffle or a negative pressure plate, etc., to adjust the flow field distribution to enhance the smoke suction efficiency. However, since the smoke suction port position of the range hood is fixed, when the concentrated area of oil fume changes, the fixed smoke suction port cannot effectively capture the oil fume, and there is still a phenomenon of oil fume escaping, resulting in poor overall smoke exhaust effect of the range hood.

[0005] Therefore, there is an urgent need for a range hood control method and a range hood to solve the above problems. SUMMARY

[0006] Based on the above problems, the purpose of the present application is to provide a range hood control method and a range hood, which can dynamically adjust the smoke inlet position, improve the oil fume suction efficiency, realize efficient smoke exhaust, and improve the user's use experience.

[0007] To achieve the above purpose, the present application adopts the following technical solutions:

[0008] On the one hand, a range hood control method is provided, and the range hood includes a smoke collecting hood and an adjusting plate movably arranged on the smoke collecting hood, and a smoke suction port is arranged on the smoke collecting hood.

[0009] The range hood control method includes the following steps:

[0010] After the range hood is started, the oil fume concentration in a preset area around the smoke suction port is detected.

[0011] According to the oil fume concentration, it is determined whether there is an oil fume escaping situation in the preset area.

[0012] If yes, the oil fume escaping position is determined according to the oil fume concentration, and the adjusting plate is controlled to move according to the determined oil fume escaping position to adjust the smoke inlet position and / or the smoke inlet area of the smoke suction port.

[0013] As an optional solution of the range hood control method, a plurality of detection points are arranged in the preset area; and the step of judging whether the preset area has the oil fume escaping condition according to the oil fume concentration comprises the following steps:

[0014] When the oil fume concentration measured by at least one of the detection points is greater than the set threshold λmin, it is determined that the preset area has the oil fume escaping condition.

[0015] By detecting the oil fume concentration of each detection point, whether the preset area has the oil fume escaping condition can be more accurately judged, so that the moving direction and the moving range of the adjusting plate can be more accurately controlled, and the possibility of oil fume escaping can be reduced.

[0016] As an optional solution of the range hood control method, a plurality of detection points are arranged in the preset area; and the step of judging whether the preset area has the oil fume escaping condition according to the oil fume concentration comprises the following steps:

[0017] Obtaining a concentration difference value of the oil fume concentration measured by the first detection point and the oil fume concentration measured by the second detection point;

[0018] Determining a concentration interval in which the concentration difference value is located;

[0019] Determining the oil fume escaping position according to the concentration interval in which the concentration difference value is located.

[0020] By calculating the concentration difference value of the oil fume concentration of the first detection point and the oil fume concentration of the second detection point, it can be determined whether the oil fume concentration of the area in which the first detection point is located is greater or the oil fume concentration of the area in which the second detection point is located is greater, and then the oil fume escaping position can be inferred and accurately determined.

[0021] As an optional solution of the range hood control method, the step of controlling the adjusting plate to move according to the determined oil fume escaping position comprises:

[0022] When λ1-λ2 satisfies λ1-λ2>ΔC, the adjusting plate is controlled to move so that the smoke inlet position of the smoke inlet is moved to a position close to the first detection point;

[0023] When λ1-λ2 satisfies -ΔC≤λ1-λ2≤ΔC, the adjusting plate is controlled to move so that the smoke inlet position of the smoke inlet is moved to a position between the first detection point and the second detection point;

[0024] When λ1-λ2 satisfies λ1-λ2<-ΔC, the adjusting plate is controlled to move so that the smoke inlet position of the smoke inlet is moved to a position close to the second detection point;

[0025] Wherein, λ1 is the oil fume concentration measured by the first detection position, and λ2 is the oil fume concentration measured by the second detection position.

[0026] The location of the oil fume escape can be determined by different oil fume concentration differences. The adjustment plate can be adjusted to different positions, thereby adjusting the smoke intake area of ​​the smoke inlet to the area with heavy oil fume, so that the smoke intake area of ​​the smoke inlet covers the area with a large amount of oil fume, which can efficiently absorb oil fumes and prevent oil fume escape.

[0027] As an optional solution of the range hood control method of the present invention, the first detection position and the second detection position are provided with detection points on both sides of the smoke inlet along the length direction. The sum of the oil fume concentrations of all detection points of the first detection position is the oil fume concentration of the first detection position, and the sum of the oil fume concentrations of all detection points of the second detection position is the oil fume concentration of the second detection position.

[0028] The length direction of the smoking port intersects the moving direction of the adjusting plate.

[0029] As an optional embodiment of the range hood control method of the present invention, the range hood control method further includes the following steps:

[0030] During the use of the range hood, the concentration of oil fumes in the preset area is monitored in real time;

[0031] When the concentration of oil fume in the preset area changes, it is determined whether the escape location of oil fume in the preset area has changed based on the change in oil fume concentration.

[0032] If so, the adjustment plate is moved according to the current position of the oil fume escape to adjust the smoke inlet position and / or smoke inlet area;

[0033] If not, the adjustment plate is controlled to maintain its current position.

[0034] During the use of the range hood, the position of the adjustment plate is dynamically adjusted according to the distribution of oil fume concentration, so that the smoke intake position of the smoke inlet is always in the area with high oil fume concentration, maintaining efficient smoke extraction and reducing the risk of oil fume escape.

[0035] On the other hand, a range hood is provided, controlled by the range hood control method described above, the range hood comprising:

[0036] Chassis;

[0037] A smoke hood is installed at the bottom of the chassis, and the smoke hood is provided with a smoke inlet;

[0038] An adjustment plate is movably mounted on the smoke collection hood;

[0039] When the adjustment plate is moved, the position and / or area of ​​the smoke inlet blocked by the adjustment plate changes.

[0040] As an optional embodiment of the range hood of the present invention, the range hood further includes a driving component, and the smoke collection hood is provided with a guide component extending along the moving direction of the adjusting plate. The adjusting plate is slidably connected to the guide component, and the output end of the driving component is connected to the adjusting plate for driving the adjusting plate to move along the guide component.

[0041] As an optional embodiment of the range hood of the present invention, the adjustment plate is provided with a smoke inlet, which can communicate with the smoke extraction port. When the adjustment plate moves relative to the smoke collection hood, the communication position and / or communication area between the smoke inlet and the smoke extraction port changes.

[0042] By driving the adjustment plate to move relative to the smoke collection hood, the position of the smoke inlet on the smoke collection hood and / or the opening of the smoke inlet can be adjusted, so that the negative pressure area is concentrated in the area with high oil fume concentration, thereby improving the oil fume intake efficiency and achieving efficient smoke exhaust.

[0043] As an optional embodiment of the range hood of the present invention, the smoke inlet is located in the middle region of the adjustment plate, and the size of the smoke inlet is smaller than the size of the smoke extraction port in the direction of movement of the adjustment plate.

[0044] As an optional embodiment of the range hood of the present invention, the smoke collection hood includes a front panel, on which the smoke inlet is provided; the front panel extends in an arc shape in a first direction, and the arc-shaped convex surface of the front panel faces outward, and the first direction extends along the path of rising smoke.

[0045] Because the front panel has a convex arc-shaped surface, the Coanda effect causes cooking fumes to adhere to the arc-shaped wall of the front panel and flow. In other words, the front panel guides the cooking fumes along the convex arc-shaped surface into the smoke inlet, concentrating the fumes into the smoke inlet and further reducing the risk of fumes escaping, thus improving the user's cooking experience. Furthermore, the outward-protruding arc-shaped front panel increases the internal cavity volume of the smoke collection hood, absorbing more fumes and preventing them from overflowing. It can accommodate the large amounts of fumes generated during stir-frying and other high-heat cooking activities, improving the range hood's smoke extraction efficiency.

[0046] As an optional embodiment of the range hood of the present invention, the adjusting plate extends in an arc shape in the first direction, and the curvature of the adjusting plate is the same as that of the front plate. This arrangement ensures that the adjusting plate remains in close contact with the front plate during movement, preventing air leakage between the adjusting plate and the smoke inlet and guaranteeing a negative pressure effect. Simultaneously, during the movement of the adjusting plate, the outward convex arc surface of the adjusting plate can continuously transition with the outward convex arc surface of the front plate, ensuring that the rising fumes can flow along the outward convex arc surface to the smoke inlet, thus guaranteeing effective smoke extraction.

[0047] As an optional embodiment of the range hood of the present invention, the range hood further includes a smoke baffle plate disposed on the smoke collection hood, the smoke baffle plate being used to block or open the smoke inlet; the smoke baffle plate extends in an arc shape in the first direction, and the curvature of the smoke baffle plate is the same as the curvature of the front plate. When the smoke baffle plate is closed, the smoke baffle plate can adapt to the curvature of the front plate, thereby sealing the smoke inlet tightly and making the front side of the front plate flat and aesthetically pleasing.

[0048] As an optional embodiment of the range hood of the present invention, the arc length of the arc segment where the front panel is located is L1, the arc length of the arc segment where the smoke inlet is located is L2, the arc length distance between the first end of the front panel and the smoke inlet is L3, and the arc length distance between the second end of the front panel and the smoke inlet is L4.

[0049] Among them, L1=L2+L3+L4; L3=1 / 6*L1; L2=1 / 2*L1; L4=1 / 3*L1.

[0050] The beneficial effects of this invention are as follows:

[0051] The range hood control method provided by this invention can determine whether cooking fumes can be fully absorbed through a preset area surrounding the smoke inlet by detecting the concentration of cooking fumes, thereby identifying any potential fume escape. When fume escape is detected, the escape location is determined based on the detected fume concentration, and the movement direction of the adjustment plate is controlled accordingly. This adjusts the smoke inlet's position and / or area to ensure the current smoke inlet area covers the rising path of the fumes, maximizing fume absorption. For example, if a high fume concentration is detected above or below the smoke inlet, indicating a risk of fume escape, the adjustment plate is moved to change the smoke inlet's position and / or area, thus altering the smoke inlet's opening and maintaining it in a position with high fume concentration. This effectively absorbs the generated fumes and prevents escape. This range hood control method can dynamically adjust the smoke inlet position and / or smoke inlet area according to the smoke concentration and escape location, so that the air volume around the smoke inlet is concentrated in the area with high smoke concentration, improving smoke intake efficiency, achieving efficient smoke exhaust, and enhancing the user experience.

[0052] The range hood provided by this invention can change the position and / or area of ​​the smoke inlet by driving the adjustment plate to move relative to the smoke collection hood, thereby adjusting the smoke inlet's position and / or smoke inlet area. When the position and concentration of cooking fumes change, adjusting the smoke inlet's area and opening can concentrate the negative pressure area in the area with high smoke concentration, improve the smoke intake efficiency, achieve efficient smoke exhaust, and enhance the user's experience. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0054] Figure 1 This is a first structural schematic diagram of a range hood provided in a specific embodiment of the present invention;

[0055] Figure 2 This is a first flowchart of the range hood control method provided in a specific embodiment of the present invention;

[0056] Figure 3 This is a second flowchart of the range hood control method provided in a specific embodiment of the present invention;

[0057] Figure 4 This is the third flowchart of the range hood control method provided in a specific embodiment of the present invention;

[0058] Figure 5 This is the fourth flowchart of the range hood control method provided in a specific embodiment of the present invention;

[0059] Figure 6 This is a schematic diagram of the adjustment plate of the range hood provided in a specific embodiment of the present invention when it is in the first state;

[0060] Figure 7 yes Figure 6 A cross-sectional view;

[0061] Figure 8 This is a schematic diagram of the adjustment plate of the range hood provided in a specific embodiment of the present invention when it is in the second state;

[0062] Figure 9 yes Figure 8 A cross-sectional view;

[0063] Figure 10 This is a schematic diagram of the adjustment plate of the range hood in the third state according to a specific embodiment of the present invention;

[0064] Figure 11 yes Figure 10 A cross-sectional view;

[0065] Figure 12 This is a schematic diagram of the internal structure of the smoke collection hood of the range hood provided in a specific embodiment of the present invention;

[0066] Figure 13This is a schematic diagram of the connection between the driving component and the adjustment plate provided in a specific embodiment of the present invention;

[0067] Figure 14 This is a schematic diagram of the second structure of the range hood provided in a specific embodiment of the present invention;

[0068] Figure 15 This is a schematic diagram of the elliptical arc segment of the front plate in a rectangular coordinate system according to a specific embodiment of the present invention;

[0069] Figure 16 This is a schematic diagram of the first shape of the smoke collection hood provided in a specific embodiment of the present invention;

[0070] Figure 17 This is a schematic diagram of the second shape of the smoke collection hood provided in a specific embodiment of the present invention;

[0071] Figure 18 This is a schematic diagram of the third shape of the smoke collection hood provided in a specific embodiment of the present invention;

[0072] Figure 19 This is a schematic diagram of the fourth shape of the smoke hood provided in a specific embodiment of the present invention.

[0073] In the picture:

[0074] 1. Smoke hood; 2. Adjustment plate; 3. Smoke baffle; 4. Drive unit; 5. Detection point;

[0075] 11. Front panel; 12. Top panel; 13. Rear panel; 14. Side panel; 15. Guide component;

[0076] 111. Smoke inlet; 151. Guide groove;

[0077] 21. Smoke inlet; 22. Sliding part; 23. Second connecting part;

[0078] 41. Push rod; 42. First connecting part;

[0079] 100. Chassis. Detailed Implementation

[0080] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0081] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0082] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0083] Example 1

[0084] This embodiment provides a range hood control method that can dynamically adjust the smoke inlet position, improve the efficiency of smoke intake, achieve efficient smoke exhaust, and enhance the user experience.

[0085] Among them, see Figure 1 The range hood includes a smoke collection hood 1 and an adjustable plate 2 movably disposed on the smoke collection hood 1. The smoke collection hood 1 is provided with a smoke inlet 111. When the adjustable plate 2 moves relative to the smoke collection hood 1, the smoke inlet position and / or the opening degree of the smoke inlet 111 changes.

[0086] like Figure 2 As shown, the range hood control method includes the following steps:

[0087] S1. After the range hood is started, the concentration of oil fumes in the preset area around the smoke inlet 111 is detected;

[0088] S2. Determine whether there is any oil fume escape in the preset area based on the oil fume concentration;

[0089] If so, the location of the oil fume escape is determined according to the oil fume concentration, and the adjustment plate 2 is moved according to the determined oil fume escape location to adjust the smoke inlet 111 and / or smoke inlet area.

[0090] If not, adjust plate 2 remains in its current position.

[0091] The range hood control method provided in this embodiment detects the concentration of cooking fumes in a preset area surrounding the smoke inlet 111. This allows the method to infer whether the cooking fumes can be fully absorbed through the smoke inlet 111 at its current position, thus determining whether there is any fumes escaping. When fumes do escape, the method determines the escape location based on the detected fume concentration and controls the movement direction of the adjustment plate 2 accordingly. This adjusts the smoke inlet position and / or area of ​​the smoke inlet 111, ensuring that the current smoke inlet area covers the rising path of the fumes and fully absorbs them. For example, when a high concentration of oil fumes is detected in the area above or below the smoke inlet 111, it indicates that there is a risk of oil fume escape in the area above or below the smoke inlet 111. By controlling the movement of the adjustment plate 2, the smoke inlet position and / or smoke inlet area of ​​the smoke inlet 111 is changed, that is, the smoke inlet area and / or opening of the smoke inlet 111 is changed, so that the current smoke inlet area of ​​the smoke inlet 111 is in a position with high oil fume concentration, thereby effectively absorbing the generated oil fumes and preventing oil fume escape.

[0092] In other words, this range hood control method can dynamically adjust the smoke inlet position and / or smoke inlet area of ​​the smoke inlet 111 according to the smoke concentration and the smoke escape location, so that the air volume around the smoke inlet 111 is concentrated in the area with high smoke concentration, thereby improving the smoke intake efficiency, achieving efficient smoke exhaust, and enhancing the user experience.

[0093] In this embodiment, as Figure 1 As shown, the area where the smoking port 111 is located and the surrounding edge area of ​​the smoking port 111 are the aforementioned preset areas.

[0094] Optionally, see Figure 1 Multiple detection points 5 are set in the preset area. By detecting the oil fume concentration at each detection point 5, it is possible to more accurately determine whether there is oil fume escape in the preset area, thereby more precisely controlling the moving direction and range of the adjustment plate 2 and reducing the possibility of oil fume escape.

[0095] Optionally, "determining whether there is oil fume escape in the preset area based on the oil fume concentration" includes the following steps:

[0096] When the oil fume concentration measured at at least one detection point 5 is greater than the set threshold λmin, it is determined that there is oil fume escape in the preset area.

[0097] That is, if the oil fume concentration measured at any one detection point 5 is greater than the set threshold λmin, it is considered that there is oil fume escape. When the oil fume concentration measured at all detection points 5 is less than or equal to the set threshold λmin, it means that there is no or only a very small amount of oil fume escape near the smoke inlet 111, and it is considered that there is no oil fume escape at this time.

[0098] Optionally, the threshold λmin is set to a range of 0.1 mg / m³. 3 ≤λmin≤2.0mg / m 3 For example, λmin can be 1.25 mg / m³. 3 .

[0099] In other embodiments, λmin can also be 0.1 mg / m 3 0.5 mg / m 3 1mg / m 3 1.5mg / m 3 2mg / m 3 The value of λmin can be selected adaptively according to actual needs, and is not limited to the specific values ​​and ranges listed above.

[0100] Optionally, at least a first detection position and a second detection position are provided at intervals in the moving direction of the adjustment plate 2 within the preset area. By detecting and comparing the oil fume concentration at the first detection position and the second detection position, the location of oil fume escape can be inferred.

[0101] Specifically, such as Figure 3 As shown, "determining the location of oil fume escape based on oil fume concentration" includes the following steps:

[0102] S21. Obtain the concentration difference between the oil fume concentration measured at the first detection position and the oil fume concentration measured at the second detection position;

[0103] S22. Determine the concentration range in which the concentration difference lies;

[0104] S23. Determine the location of the oil fume escape based on the concentration range where the concentration difference lies.

[0105] By calculating the concentration difference between the oil fume concentration at the first detection point and the oil fume concentration at the second detection point, it can be determined whether the oil fume concentration is higher in the area where the first detection point is located or in the area where the second detection point is located, and thus infer which area the oil fume is concentrated in.

[0106] Specifically, when the oil fume concentration measured at the first detection position is significantly higher than that at the second detection position, it indicates that the oil fume in the area where the first detection position is located has not been fully absorbed, and there is a risk of oil fume escape from that area. The escape location can be determined in the direction of the first detection position. Similarly, when the oil fume concentration measured at the second detection position is significantly higher than that at the first detection position, it indicates that the oil fume in the area where the second detection position is located has not been fully absorbed, and there is a risk of oil fume escape from that area. The escape location can be determined in the direction of the second detection position. When the oil fume concentrations measured at the first and second detection positions are not significantly different, it indicates that the area with the highest oil fume concentration is between the first and second detection positions. The area with the highest probability of oil fume escape can be determined as being between the first and second detection positions.

[0107] Optionally, such as Figure 4 As shown, "controlling the movement of the adjusting plate 2 according to the determined oil fume escape position" includes:

[0108] When λ1-λ2 satisfies λ1-λ2>ΔC, the control adjustment plate 2 is moved so that the smoke inlet position of the smoke inlet 111 moves closer to the position of the first detection position;

[0109] When λ1-λ2 satisfies -ΔC≤λ1-λ2≤ΔC, the control adjustment plate 2 moves so that the smoke inlet position of the smoke inlet 111 moves toward the area between the first detection position and the second detection position;

[0110] When λ1-λ2 satisfies λ1-λ2<-ΔC, the control adjustment plate 2 is moved so that the smoke inlet position of the smoke inlet 111 moves closer to the position of the second detection position;

[0111] Wherein, λ1 is the oil fume concentration measured at the first detection position, and λ2 is the oil fume concentration measured at the second detection position.

[0112] The location of the oil fume escape can be determined by different oil fume concentration differences. The adjustment plate 2 can be adjusted to different positions, thereby adjusting the smoke inlet area of ​​the smoke inlet 111 to the area with heavy oil fume, so that the smoke inlet area of ​​the smoke inlet 111 covers the area with a large amount of oil fume, which can efficiently absorb oil fume and prevent oil fume from escaping.

[0113] like Figure 6 and Figure 7 As shown, when λ1-λ2 is measured to satisfy λ1-λ2<-ΔC, it indicates that the oil fume concentration at the second detection position is much greater than that at the first detection position. At this time, the control adjustment plate 2 is moved, causing the smoke inlet 111 to move towards the area where the second detection position is located. Figure 6 The smoke inlet 111 is moved to the area below the second detection position to prevent fumes from escaping from the lower area. Figure 8 and Figure 9As shown, when λ1-λ2 is measured to satisfy -ΔC≤λ1-λ2≤ΔC, it indicates that the oil fume concentration at the first detection position is not significantly different from that at the second detection position. At this time, the control adjustment plate 2 is moved, causing the smoke inlet 111 to move towards the area between the first and second detection positions. Figure 8 The smoke inlet 111 is moved to the middle area of ​​the first and second detection positions to prevent fumes from escaping from the middle area. For example... Figure 10 and Figure 11 As shown, when λ1-λ2 is measured to satisfy λ1-λ2>ΔC, it indicates that the oil fume concentration at the first detection position is much greater than that at the second detection position. At this time, the control adjustment plate 2 is moved so that the smoke inlet 111 moves towards the area where the first detection position is located. Figure 10 The smoke inlet 111 is moved to the area above the first detection position to prevent the fumes from escaping from the upper area.

[0114] Optionally, the value range of ΔC is: 0 mg / m³ 3 <ΔC≤1.5mg / m 3 For example, ΔC can be 0.1 mg / m³. 3 0.3 mg / m 3 0.5 mg / m 3 0.8 mg / m 3 1.0 mg / m 3 1.2 mg / m 3 1.5mg / m 3 And so on, but not limited to the specific values ​​and ranges listed above.

[0115] Optionally, see Figure 1 The first and second detection positions are located along the length direction of the smoking opening 111. Figure 1 Detection points 5 are set on both sides of the Z-direction of the control plate 2. The sum of the oil fume concentrations of all detection points 5 at the first detection position is the oil fume concentration of the first detection position, and the sum of the oil fume concentrations of all detection points 5 at the second detection position is the oil fume concentration of the second detection position. The length direction of the smoke inlet 111 intersects the moving direction of the adjustment plate 2. That is, each detection position has multiple detection points 5, and each detection point 5 is equipped with an oil fume detection element. The oil fume concentration of the corresponding detection position is obtained by acquiring and summing the detection values ​​of all oil fume detection elements at the same detection position. For example, the oil fume detection element can be an oil fume sensor, such as an infrared sensor or a laser sensor, as long as it meets the oil fume detection requirements.

[0116] In this embodiment, as Figure 1As shown, the first detection position has two detection points 5, namely A1 and A2. The oil fume concentration measured by the two detection points 5 of the first detection position is the oil fume concentration in the upper part of the preset area, which can reflect the oil fume concentration in the upper part of the preset area. The second detection position has two detection points 5, namely B1 and B2. The oil fume concentration measured by the two detection points 5 of the second detection position is the oil fume concentration in the lower part of the preset area, which can reflect the oil fume concentration in the lower part of the preset area.

[0117] In other embodiments, the number of detection positions and the number of detection points 5 arranged at each detection position can be arranged adaptively according to actual needs, and are not limited to the arrangement methods listed above.

[0118] Optionally, such as Figure 5 As shown, the range hood control method also includes the following steps:

[0119] S3. During the use of the range hood, the concentration of oil fumes in the preset area is detected in real time;

[0120] S4. When the oil fume concentration in the preset area changes, determine whether the oil fume escape location in the preset area has changed based on the change in oil fume concentration.

[0121] If so, the control plate 2 is moved according to the current position of the oil fume escape to adjust the position and / or area of ​​the smoke inlet 111.

[0122] If not, control the adjustment plate 2 to maintain its current position.

[0123] When the range hood detects a change in the concentration of cooking fumes in a preset area during use, it indicates a shift in the area where the fumes are concentrated. By controlling the movement of the adjustment plate 2, the smoke intake position of the suction inlet 111 can be changed, moving it to an area with a higher current smoke concentration, thus preventing fumes from escaping. In other words, dynamically adjusting the smoke intake position and / or area of ​​the suction inlet 111 during use ensures that the suction area of ​​the suction inlet 111 is always within the area of ​​high smoke concentration, maintaining efficient smoke extraction, reducing the possibility of smoke escape, and improving the range hood's smoke removal effect.

[0124] Optionally, "determining whether the escape location of the oil fume in the preset area has changed based on the change in oil fume concentration" includes the following steps:

[0125] S41. Obtain the concentration difference between the oil fume concentration measured at the first detection position and the oil fume concentration measured at the second detection position;

[0126] S42. Determine the concentration range in which the concentration difference lies;

[0127] S43. Determine the location of the oil fume escape based on the concentration range where the concentration difference lies.

[0128] For example, if the smoke inlet 111 is located in the area of ​​the first detection position, and the smoke concentration at the second detection position is significantly higher than that at the first detection position, it indicates a higher smoke concentration at the second detection position, posing a risk of smoke escape. The adjusting plate 2 is then moved to shift the smoke inlet 111 towards the area of ​​the second detection position. Alternatively, if the smoke concentrations at the first and second detection positions are similar, it indicates a higher smoke concentration in the area between the first and second detection positions. The adjusting plate 2 is then moved to shift the smoke inlet 111 towards the area between the first and second detection positions. In other words, during the use of the range hood, the position of the adjusting plate 2 is dynamically adjusted according to the smoke concentration distribution to ensure that the smoke inlet 111 is always located in an area with high smoke concentration, maintaining efficient smoke extraction and reducing the risk of smoke escape.

[0129] In this embodiment, the step of "controlling the movement of the adjustment plate 2 according to the current position of the oil fume escape" is similar to the step of "controlling the movement of the adjustment plate 2 according to the determined position of the oil fume escape" in step S2, and will not be described again here.

[0130] Example 2

[0131] This embodiment provides a range hood, controlled using the range hood control method described in Embodiment 1 above. (See also...) Figure 1 , Figure 6 and Figure 7 The range hood includes a casing 100, a smoke collection hood 1, and an adjustment plate 2. The smoke collection hood 1 is located below the casing 100 and has a smoke inlet 111. The adjustment plate 2 is movably mounted on the smoke collection hood 1. When the adjustment plate 2 is moved, the position and / or area of ​​the smoke inlet 111 obstructed by the adjustment plate 2 changes.

[0132] Furthermore, a fan (not shown) is installed inside the casing 100. When the fan is started, it creates a negative pressure inside the fume hood 1, causing the oil fumes to be drawn in from the fume inlet 21 under the action of negative pressure. The outlet of the fan is connected to the exhaust pipe to discharge the oil fumes outdoors.

[0133] The range hood provided in this embodiment can change the position and / or area of ​​the smoke inlet 111 by driving the adjustment plate 2 to move relative to the smoke collection hood 1, thereby adjusting the smoke inlet position and / or smoke inlet area of ​​the smoke inlet 111. When the position and concentration of oil fumes generated during cooking change, the negative pressure area can be concentrated in the area with high oil fume concentration by adjusting the smoke inlet area and opening of the smoke inlet 111, thereby improving the oil fume intake efficiency, achieving efficient smoke exhaust, and enhancing the user experience.

[0134] Optionally, see Figure 6 , Figure 7 ,Figure 12 and Figure 13 The range hood also includes a drive unit 4. A guide member 15 extending along the moving direction of the adjusting plate 2 is provided on the smoke collection hood 1. The adjusting plate 2 is slidably connected to the guide member 15. The output end of the drive unit 4 is connected to the adjusting plate 2 and is used to drive the adjusting plate 2 to move along the guide member 15. That is, the drive unit 4 controls the movement of the adjusting plate 2 relative to the smoke collection hood 1, thereby adjusting the position and / or area of ​​the smoke inlet 111 blocked by the adjusting plate 2, thus adjusting the smoke inlet position and smoke inlet area of ​​the smoke inlet 111. The guide member 15 ensures that the adjusting plate 2 can always move in the set direction, guaranteeing the stability of the adjustment of the adjusting plate 2.

[0135] In this embodiment, along the length direction of the smoking port 111 ( Figure 1 Guide members 15 are provided on both sides of the adjustment plate 2 (in the Z direction), so that both sides of the adjustment plate 2 have a guiding effect, thereby improving the movement stability and movement accuracy of the adjustment plate 2.

[0136] Optionally, see Figure 12 and Figure 13 The guide member 15 is provided with a guide groove 151, and the adjusting plate 2 is provided with a sliding part 22. The sliding part 22 and the guide groove 151 are slidably engaged in the moving direction of the adjusting plate 2. That is, the adjusting plate 2 is slidably connected to the guide member 15 through the sliding part 22 and the guide groove 151. The engagement of the sliding part 22 and the guide groove 151 can limit the moving direction of the adjusting plate 2 while ensuring smooth movement of the adjusting plate 2.

[0137] In this embodiment, the smoke hood 1 has two guide members 15 spaced apart on each side of the adjusting plate 2. Correspondingly, two sliding parts 22 are spaced apart on each side of the adjusting plate 2. The two sliding parts 22 are slidably connected to the two guide members 15 in a one-to-one correspondence, thereby improving the stability of the sliding connection between the adjusting plate 2 and the guide members 15. In other embodiments, the number and arrangement of the guide members 15 can be set according to the actual situation, and are not limited to the number and arrangement listed above.

[0138] Optionally, the output end of the drive component 4 is provided with a first connecting part 42, and the adjusting plate 2 is provided with a second connecting part 23, with the first connecting part 42 and the second connecting part 23 being movably connected. During the movement of the driving adjusting plate 2, the first connecting part 42 and the second connecting part 23 can adapt to each other to accommodate the movement trajectory of the adjusting plate 2 and prevent interference.

[0139] For example, see Figure 13 The first connecting part 42 can be a collar, and the second connecting part 23 protrudes from one side of the adjusting plate 2. The collar is fitted onto the second connecting part 23 and can rotate adaptively relative to the second connecting part 23. Specifically... Figure 13In this design, the second connecting part 23 is integrally formed with the sliding part 22 located on the lower part of the adjusting plate 2, which can reduce the number of connecting parts.

[0140] In this embodiment, two driving components 4 are provided, distributed on both sides of the adjusting plate 2, which can simultaneously drive the adjusting plate 2 to move, preventing the adjusting plate 2 from deviating from its normal position and improving the moving efficiency of the adjusting plate 2. In other embodiments, only one driving component 4 can be provided, which can be adjusted according to the actual situation, and is not limited to the number and arrangement of driving components 4 listed above.

[0141] Furthermore, the driving component 4 includes a fixed part and a push rod 41 that is retractable relative to the fixed part, and the push rod 41 is provided with the aforementioned first connecting part 42.

[0142] For example, the drive component 4 can be a linear drive mechanism such as a cylinder, hydraulic cylinder, push rod motor, or lead screw and nut mechanism.

[0143] Optionally, see Figure 1 , Figure 6 and Figure 7 The regulating plate 2 is provided with a smoke inlet 21, which can communicate with the smoke extraction port 111. When the regulating plate 2 moves relative to the smoke collection hood 1, the communication position and / or communication area between the smoke inlet 21 and the smoke extraction port 111 changes. That is, by driving the regulating plate 2 to move relative to the smoke collection hood 1, the communication position and / or communication area between the smoke inlet 21 and the smoke extraction port 111 can be adjusted, thereby adjusting the position of the smoke inlet 21 on the smoke collection hood 1 and / or adjusting the opening of the smoke inlet 21. When the location and concentration of cooking fumes change, by adjusting the position and opening of the smoke inlet 21, the negative pressure area (the area where the smoke inlet 21 is located) can be concentrated in the area with high fume concentration, improving the fume intake efficiency and achieving efficient smoke exhaust.

[0144] See Figure 13 The smoke inlet 21 is located in the central area of ​​the adjusting plate 2. In the direction of movement of the adjusting plate 2, the size of the smoke inlet 21 is smaller than the size of the smoke inlet 111. When the smoke inlet 21 moves within the area of ​​the smoke inlet 111, the smoke intake area remains unchanged, always equal to the opening area of ​​the smoke inlet 21, but the position of the smoke inlet 21 changes, thus adjusting the smoke intake position. When the smoke inlet 21 moves at least partially out of the area of ​​the smoke inlet 111, the smoke intake area of ​​the smoke inlet 21 decreases, thus adjusting the smoke intake area of ​​the smoke inlet 21.

[0145] In this embodiment, as Figure 13 As shown, the adjusting plate 2 forms a blocking portion in the area outside the smoke inlet 21. When the adjusting plate 2 is moved, the position and / or area of ​​the blocking portion blocking the smoke inlet 111 changes. Specifically, refer to... Figure 6When the adjusting plate 2 moves upward, the smoke inlet 21 moves upward within the smoke outlet 111. Simultaneously, the obstruction below the smoke inlet 21 gradually obstructs the lower half of the smoke outlet 111, while the obstruction above the smoke inlet 21 gradually moves away from the smoke outlet 111. When the adjusting plate 2 moves downward, the smoke inlet 21 moves downward within the smoke outlet 111. Simultaneously, the obstruction above the smoke inlet 21 gradually obstructs the upper half of the smoke outlet 111, while the obstruction below the smoke inlet 21 gradually moves away from the smoke outlet 111.

[0146] Of course, in other embodiments, the size of the smoke inlet 21 can be designed to be the same as the size of the smoke inlet 111. By adjusting the position of the adjusting plate 2, the communication area between the smoke inlet 21 and the smoke inlet 111 can be increased or decreased, thereby adjusting the smoke inlet position and smoke inlet area of ​​the area where the smoke inlet 111 is located.

[0147] In some alternative implementations, the smoke inlet 21 may not be provided on the adjusting plate 2. For example, an adjusting plate 2 may be provided above and below the smoke inlet 111. When the upper adjusting plate 2 is driven to move downward, the smoke inlet position of the smoke inlet 111 is in the lower half of the smoke inlet 111. By adjusting the displacement of the upper adjusting plate 2, the smoke inlet area of ​​the smoke inlet 111 can be adjusted. When the lower adjusting plate 2 is driven to move upward, the smoke inlet position of the smoke inlet 111 is in the upper half of the smoke inlet 111. By adjusting the displacement of the lower adjusting plate 2, the smoke inlet area of ​​the smoke inlet 111 can be adjusted. When the two adjusting plates 2 are driven to move towards each other, the smoke inlet position of the smoke inlet 111 is in the middle region of the smoke inlet 111. By adjusting the displacement of the two adjusting plates 2, the smoke inlet area of ​​the smoke inlet 111 can be adjusted.

[0148] Example 3

[0149] In related technologies, the front side of the smoke collection hood 1 of a range hood is usually a flat surface or a simple concave curved surface, which results in a limited internal smoke collection chamber space for the smoke collection hood 1, poor smoke collection effect, and easy overflow of oil fumes, affecting the smoke extraction effect.

[0150] To address the aforementioned issues, this embodiment provides a range hood that prevents oil fumes from overflowing and improves the smoke collection effect.

[0151] like Figure 1 , Figure 6 and Figure 7As shown, the range hood includes a smoke collection hood 1, which includes a front panel 11 with a smoke inlet 111. The front panel 11 extends in an arc shape in a first direction, with the convex arc surface facing outwards, extending along the path of rising fumes. During the rising of fumes, under the negative pressure at the smoke inlet 21, the fumes hit the front panel 11. Due to the convex arc surface of the front panel 11, the fumes adhere to the arc surface of the front panel 11 and flow under the Coanda effect. That is, the front panel 11 can guide the fumes to flow along the convex arc surface into the smoke inlet 21, so that the fumes are concentrated and sucked into the smoke inlet 21, further reducing the risk of fumes escaping and improving the user's cooking experience.

[0152] In addition, the outward-protruding arc-shaped front panel 11 can increase the internal cavity volume of the fume hood 1, absorb more oil fumes, prevent oil fumes from overflowing, adapt to the large amount of oil fumes generated by stir-frying, and improve the exhaust effect of the range hood.

[0153] In this embodiment, refer to Figure 1 and Figure 6 The orientation is defined as follows: the first direction is the Y direction, which is the vertical direction of the smoke hood 1. For ease of description, the width direction of the smoke hood 1 is referred to as the second direction. Figure 6 In the Z direction, the depth direction of smoke hood 1 is the third direction. Figure 6 The X direction in the equation.

[0154] Optionally, see Figure 10 , Figure 11 and Figure 13 The adjusting plate 2 extends in an arc shape in the first direction, and the curvature of the adjusting plate 2 is the same as that of the front plate 11. This design ensures that the adjusting plate 2 always moves in close contact with the front plate 11 during movement, preventing air leakage between the adjusting plate 2 and the smoke inlet 111 and guaranteeing a negative pressure effect. Simultaneously, during the movement of the adjusting plate 2, its convex arc surface continuously transitions with the convex arc surface of the front plate 11, ensuring that the rising fumes flow along the convex arc surface to the smoke inlet 21, thus guaranteeing effective smoke extraction.

[0155] Optionally, see Figure 1 and Figure 6 The range hood also includes a smoke baffle 3 installed on the smoke collection hood 1. The smoke baffle 3 is used to block or open the smoke inlet 111. When the range hood is in use, the smoke baffle 3 is open, exposing the smoke inlet 111 and the smoke inlet 21 to ensure smooth smoke extraction. At the same time, when the smoke baffle 3 is open, it can block the rising fumes from escaping from the front area above the smoke inlet 21, further preventing fumes from escaping from the front area above the smoke inlet 21. When the range hood is not in use, the smoke baffle 3 is closed, blocking the smoke inlet 111 and the smoke inlet 21, making the front side of the front panel 11 flat and aesthetically pleasing.

[0156] In this embodiment, the smoke baffle 3 extends in an arc shape in the first direction, and the curvature of the smoke baffle 3 is the same as that of the front plate 11. With this configuration, when the smoke baffle 3 is closed, it can adapt to the curvature of the front plate 11, thereby sealing the smoke inlet 111 tightly and making the front side of the front plate 11 flat and aesthetically pleasing.

[0157] Optionally, see Figure 14 The arc length of the segment containing the front plate 11 is L1, the arc length of the segment containing the smoke inlet 111 is L2, the arc distance between the first end of the front plate 11 and the smoke inlet 111 is L3, and the arc distance between the second end of the front plate 11 and the smoke inlet 111 is L4. Wherein, L1 = L2 + L3 + L4; L3 = 1 / 6 * L1; L2 = 1 / 2 * L1; L4 = 1 / 3 * L1.

[0158] Reference Figure 14 The front panel 11 is positioned such that the first end is the top and the second end is the bottom. The smoke inlet 111 is located in the upper middle part of the front panel 11. This arrangement allows the area where the smoke inlet 111 is located to cover the rising path of the fumes. By adjusting the position of the smoke inlet 21 within the area where the smoke inlet 111 is located, the smoke inlet 21 can be placed in different areas where fumes are concentrated, adapting to the dynamic changes in fumes and preventing fumes from escaping.

[0159] Furthermore, the arc length of the arc segment where the smoke baffle 3 is located is L2, that is, the arc length of the smoke baffle 3 is consistent with the arc length of the smoke inlet 111, so that when the smoke baffle 3 is closed, it can just block the smoke inlet 111 and ensure that the front side of the front plate 11 is flat.

[0160] Optionally, see Figure 14 and Figure 16 When the smoke baffle 3 is in its maximum open position (the smoke inlet 111), the tangent at the connection point between the arc segment of the smoke baffle 3 and the front plate 11 is horizontal. That is, when the smoke baffle 3 is opened to its limit position, the tangent at the connection point N between the smoke baffle 3 and the front plate 11 is horizontal.

[0161] Example 4

[0162] This embodiment provides a range hood, which differs from Embodiment 3 in that:

[0163] like Figure 1 , Figure 6 and Figure 7 As shown, the range hood includes a smoke collection hood 1, which includes a front panel 11. The front panel 11 extends in an arc shape along a first direction, and the arc-shaped convex surface of the front panel 11 faces the outside of the smoke collection hood 1. Figure 15 and Figure 16The front panel 11 has an elliptical arc profile. On the one hand, the elliptical arc of the front panel 11 can better conform to the natural diffusion path of cooking fumes, thus more effectively capturing and containing the scattered cooking fumes and preventing them from escaping. On the other hand, the elliptical arc of the front panel 11 can reduce airflow resistance, making airflow smoother, thereby drawing cooking fumes into the smoke inlet 21 more quickly and improving exhaust efficiency.

[0164] In some other embodiments, the arc-shaped contour of the front panel 11 can also be designed as an arc segment, which can also guide the fumes to flow towards the smoke inlet 21 and ensure the smoke extraction effect.

[0165] like Figure 14 , Figure 15 and Figure 16 As shown, the elliptical arc segment of the ellipse containing the front plate 11 is placed in the XY rectangular coordinate system. This elliptical arc segment satisfies the standard ellipse equation:

[0166]

[0167] Specifically Figure 15 In the diagram, the center of the ellipse is O(0,0), and the two endpoints of the elliptical arc segment containing the front plate 11 are (a,0) and (b,0), respectively. The focus of the ellipse containing the arc segment is (c,0). Here, a, b, and c satisfy |a| = 0. 2 -b 2 |=c 2 .

[0168] Optionally, the semi-major axis of the ellipse containing the elliptical arc segment is a, and the semi-minor axis is b. Wherein, 250mm ≤ a ≤ 410mm; 250mm ≤ b ≤ 410mm. This dimensional range design allows the curvature of the front panel 11 to better adapt to the path of oil fume diffusion, more effectively capturing oil fumes and ensuring smoke extraction performance.

[0169] For example, 'a' can take values ​​of 250mm, 280mm, 300mm, 320mm, 350mm, 370mm, 400mm, 410mm, etc., but is not limited to the specific values ​​and ranges listed above.

[0170] For example, b can take values ​​of 250mm, 270mm, 290mm, 310mm, 330mm, 350mm, 370mm, 390mm, 410mm, etc., but is not limited to the specific values ​​and ranges listed above.

[0171] Optionally, see Figure 6 and Figure 7The smoke hood 1 also includes a top plate 12, a rear plate 13, and side plates 14. The top plate 12, the front plate 11, and the rear plate 13 are connected end to end in sequence, and the top plate 12, the front plate 11, and the rear plate 13 are all connected to the side plates 14 at both ends in the second direction. That is, the top plate 12, the front plate 11, the rear plate 13, and the two side plates 14 surround and form the smoke hood 1, and a smoke collection chamber is formed inside the smoke hood 1.

[0172] See Figure 6 and Figure 7 and combined Figure 15 and Figure 16 The top plate 12 extends along the major axis of the ellipse containing the elliptical arc segment in the third direction, and the rear plate 13 extends along the minor axis of the ellipse containing the elliptical arc segment in the first direction. The first direction, the second direction, and the third direction are perpendicular to each other. Specifically... Figure 7 In the middle, the top plate 12 is set horizontally, the rear plate 13 is set vertically, and the upper and lower ends of the front plate 11 are connected to the top plate 12 and the rear plate 13 respectively.

[0173] In this embodiment, refer to Figure 6 and Figure 7 The orientations are: the first direction is the Y direction, the second direction is the Z direction, and the third direction is the X direction.

[0174] Optionally, the dimension of the top plate 12 in the third direction is the length of the semi-major axis of the ellipse containing the elliptical arc segment, and the dimension of the rear plate 13 in the first direction is the length of the semi-minor axis of the ellipse containing the elliptical arc segment. That is, the connection point between the top plate 12 and the rear plate 13 is the center of the ellipse containing the elliptical arc segment, and the arc-shaped outline of the front plate 11 is a quarter ellipse.

[0175] In some embodiments, such as Figure 16 and Figure 17 As shown, the dimensions of the top plate 12 and the rear plate 13 of the smoke hood 1 can be designed to be approximately equal, that is, a and b are approximately equal, so that the arc contour of the front plate 11 is approximately a quarter-circle arc segment. The lengths of a and b can be greater than the length of the chassis 100 in the third direction, such as... Figure 16 As shown. Alternatively, the lengths of a and b can also be less than the length of chassis 100 in the third direction, such as... Figure 17 As shown.

[0176] In some embodiments, such as Figure 18 and Figure 19 As shown, the dimensions of the top plate 12 and the rear plate 13 of the smoke hood 1 can be designed to be unequal, i.e., a and b are unequal, so that the arcuate outline of the front plate 11 is a quarter-elliptic arc segment. Here, a can be greater than b, and the length of a is greater than the length of the chassis 100 in the third direction, such as... Figure 18 As shown. Alternatively, a can be less than b, and the length of a is less than the length of chassis 100 in the third direction, such as...Figure 19 As shown.

[0177] In actual design, the size ratio of the top plate 12 and the rear plate 13 can be adjusted according to the needs, and is not limited to the length dimension design methods listed above.

[0178] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method for controlling a range hood, characterized in that, The range hood includes a smoke collection hood (1) and an adjustment plate (2) movably disposed on the smoke collection hood (1), and the smoke collection hood (1) is provided with a smoke inlet (111); The range hood control method includes the following steps: After the range hood is started, the concentration of oil fumes in a preset area around the smoke inlet (111) is detected; Determine whether there is any oil fume escape from the preset area based on the oil fume concentration; If so, the location of the oil fume escape is determined according to the oil fume concentration, and the adjustment plate (2) is moved according to the determined oil fume escape location to adjust the smoke inlet position and / or smoke inlet area of ​​the smoke inlet (111).

2. The range hood control method according to claim 1, characterized in that, Multiple detection points (5) are set in the preset area; the determination of whether there is oil fume escape in the preset area based on the oil fume concentration includes the following steps: When the oil fume concentration measured at at least one of the detection points (5) is greater than the set threshold λmin, it is determined that there is oil fume escape in the preset area.

3. The range hood control method according to claim 1, characterized in that, Within the preset area, at least a first detection position and a second detection position are provided at intervals along the moving direction of the adjustment plate (2); the determination of the oil fume escape position based on the oil fume concentration includes the following steps: Obtain the concentration difference between the oil fume concentration measured at the first detection position and the oil fume concentration measured at the second detection position; Determine the concentration range within which the concentration difference lies; The location of the oil fume escape is determined based on the concentration range in which the concentration difference lies.

4. The range hood control method according to claim 3, characterized in that, The method of controlling the movement of the adjusting plate (2) according to the determined oil fume escape position includes: When λ1-λ2 satisfies λ1-λ2>ΔC, the adjustment plate (2) is controlled to move so that the smoke inlet (111) moves closer to the position of the first detection position; When λ1-λ2 satisfies -ΔC≤λ1-λ2≤ΔC, the adjustment plate (2) is controlled to move so that the smoke inlet position of the smoking port (111) moves toward the area between the first detection position and the second detection position; When λ1-λ2 satisfies λ1-λ2<-ΔC, the adjustment plate (2) is controlled to move so that the smoke inlet (111) moves closer to the position of the second detection position; Wherein, λ1 is the oil fume concentration measured by the first detection position, and λ2 is the oil fume concentration measured by the second detection position.

5. The range hood control method according to claim 3, characterized in that, The first detection position and the second detection position are provided with detection points (5) on both sides of the smoking port (111) along the length direction. The sum of the oil fume concentration of all detection points (5) of the first detection position is the oil fume concentration of the first detection position, and the sum of the oil fume concentration of all detection points (5) of the second detection position is the oil fume concentration of the second detection position. The length direction of the smoking port (111) intersects the moving direction of the adjusting plate (2).

6. The range hood control method according to any one of claims 1-5, characterized in that, The range hood control method also includes the following steps: During the use of the range hood, the concentration of oil fumes in the preset area is monitored in real time; When the concentration of oil fume in the preset area changes, it is determined whether the escape location of oil fume in the preset area has changed based on the change in oil fume concentration. If so, the adjustment plate (2) is moved according to the current position of the oil fume escape to adjust the smoke inlet position and / or smoke inlet area of ​​the smoke inlet (111); If not, control the adjustment plate (2) to maintain its current position.

7. A range hood, characterized in that, The range hood is controlled by the control method described in any one of claims 1-6, wherein the range hood comprises: Chassis (100); A smoke hood (1) is provided below the chassis (100), and the smoke hood (1) is provided with a smoke inlet (111); An adjusting plate (2) is movably disposed on the smoke collection hood (1); When the adjustment plate (2) is moved, the position and / or area of ​​the adjustment plate (2) blocking the smoking port (111) changes.

8. The range hood according to claim 7, characterized in that, The range hood also includes a drive component (4), and the smoke collection hood (1) is provided with a guide component (15) extending along the moving direction of the adjustment plate (2). The adjustment plate (2) is slidably connected to the guide component (15), and the output end of the drive component (4) is connected to the adjustment plate (2) to drive the adjustment plate (2) to move along the guide component (15).

9. The range hood according to claim 7, characterized in that, The adjusting plate (2) is provided with a smoke inlet (21), which can communicate with the smoking port (111). When the adjusting plate (2) moves relative to the smoke hood (1), the communication position and / or communication area between the smoke inlet (21) and the smoking port (111) changes.

10. The range hood according to claim 9, characterized in that, The smoke inlet (21) is located in the middle region of the regulating plate (2), and the size of the smoke inlet (21) is smaller than the size of the smoke outlet (111) in the direction of movement of the regulating plate (2).

11. The range hood according to claim 7, characterized in that, The smoke hood (1) includes a front plate (11) on which the smoke inlet (111) is provided; the front plate (11) extends in an arc shape in a first direction, and the arc-shaped convex surface of the front plate (11) faces outward, and the first direction extends along the path of rising oil fumes.

12. The range hood according to claim 11, characterized in that, The adjustment plate (2) extends in an arc shape in the first direction, and the curvature of the adjustment plate (2) is the same as that of the front plate (11).

13. The range hood according to claim 11, characterized in that, The range hood also includes a smoke baffle (3) disposed on the smoke collection hood (1), the smoke baffle (3) being used to block or open the smoke inlet (111); the smoke baffle (3) extends in an arc shape in the first direction, and the curvature of the smoke baffle (3) is the same as the curvature of the front plate (11).

14. The range hood according to claim 11, characterized in that, The arc length of the arc segment where the front plate (11) is located is L1, the arc length of the arc segment where the smoking port (111) is located is L2, the arc length distance between the first end of the front plate (11) and the smoking port (111) is L3, and the arc length distance between the second end of the front plate (11) and the smoking port (111) is L4. Among them, L1=L2+L3+L4; L3=1 / 6*L1; L2=1 / 2*L1; L4=1 / 3*L1.

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