Adjustable range hood filter, range hood and control method thereof

Abstract

The present invention discloses an adjustable range hood filter, which includes a first filter assembly and a second filter assembly. The second filter assembly is slidably attached to a side surface of the first filter assembly, and a plurality of filter holes are formed in the overlapping area of the first filter assembly and the second filter assembly. When the second filter assembly is extended or retracted on the surface of the first filter assembly, the size and number of the filter holes in the overlapping area change. The present invention allows the second filter assembly to be attached to the first filter assembly and to be retracted or retracted along its surface, thereby making the size and number of the filter holes formed in the overlapping area of the first filter assembly and the second filter assembly variable. The user can adjust the mesh size of the range hood filter according to different requirements for the suction and exhaust effects and the grease separation effects. The filter structure is simple and easy to adjust, which effectively improves the user experience.

Description

Technical Field

[0001] The invention belongs to the technical field of range hoods, and particularly relates to an adjustable range hood filter, a range hood and a control method thereof. Background Art

[0002] Range hoods are electric appliances designed specifically for kitchen use. They quickly and effectively remove cooking fumes and harmful gases, maintaining a clean, hygienic kitchen and fresh air. They are an essential appliance for modern households. The filter is a crucial component of a range hood. After passing through the filter, fumes collide with the surface of the filter, where the grease in the fumes adheres to the filter and accumulates as droplets, while the fumes are exhausted outdoors through the air duct. With the improvement of consumers' quality of life and the refinement of standards and regulations, people's expectations for range hoods are becoming increasingly higher. While smoke extraction and exhaust efficiency are a fundamental consumer concern, standards and regulations are also increasingly prioritizing environmental performance and user experience, as reflected in factors such as fume removal efficiency and grease separation.

[0003] However, the mesh size of current range hood filters (i.e., the size of the mesh and the number of holes within a certain area) is fixed and cannot be adaptively adjusted according to the usage environment. When a filter with a larger mesh size is selected, the suction and exhaust effect is good and the fumes in the kitchen can be quickly extracted. However, the grease separation degree is low, and most of the oil droplets in the fumes enter the range hood, especially the fan system. Over time, the grease accumulates and increases, resulting in problems such as reduced fan performance, increased noise, and odor. When a filter with a smaller mesh size is selected, the grease separation effect is good and most of the oil droplets in the fumes can be filtered out. However, when faced with cooking methods that produce a lot of fumes, such as stir-frying, the small mesh size increases the air inlet resistance of the fan, and the fumes generated by cooking cannot be extracted in time, resulting in a decrease in kitchen air quality. Over time, the mesh is prone to clogging, requiring frequent cleaning, and a poor user experience. Summary of the Invention

[0004] The main purpose of the present invention is to provide an adjustable range hood filter to solve the problem in the prior art that the mesh size of the range hood filter cannot be adjusted and the suction and exhaust effects and the grease separation effects cannot be taken into account at the same time.

[0005] Another object of the present invention is to provide a range hood.

[0006] Another object of the present invention is to provide a range hood control method.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is:

[0008] An adjustable range hood filter includes a first filter assembly and a second filter assembly. The second filter assembly can be slidably attached to a side surface of the first filter assembly, and multiple filter holes are formed in the overlapping area of the first filter assembly and the second filter assembly. When the second filter assembly is extended or retracted, the size and number of the filter holes in the overlapping area change.

[0009] Preferably, the first filter assembly includes a first fixing rod, a second fixing rod and a plurality of first filter strips arranged parallel to each other, the spacing between two adjacent first filter strips is fixed, one end of each first filter strip is connected to the first fixing rod, and the other end is connected to the second fixing rod.

[0010] Preferably, the second filter screen assembly includes a third fixed rod, a first movable rod, an elastic member and a plurality of second filter strips arranged parallel to each other, the third fixed rod, the plurality of second filter strips and the first movable rod are arranged in parallel in sequence, the elastic member is fixedly connected to the third fixed rod, the first movable rod and the ends of the plurality of second filter strips on the same side, the elastic member is retractable and is used to adjust the distance between two adjacent second filter strips, and the second filter strips can slide relative to the first filter strip.

[0011] Preferably, the elastic member is curlable, and when the elastic member is not subjected to tension, the length of the second filter assembly is greater than or equal to the length of the first filter assembly, and the filter holes in the overlapping area are the smallest and the largest.

[0012] Preferably, the third fixed rod is fixedly connected to the first fixed rod, and the first movable rod can move in a direction parallel to the length of the first filter strip.

[0013] A range hood comprises an adjustable range hood filter, a range hood body, a control module, and a filter adjustment component and an oil smoke detection device respectively connected to the control module; the adjustable range hood filter is installed in the range hood body and covers the smoke inlet; the filter adjustment component is arranged in the range hood body and connected to the adjustable range hood filter, and is used to adjust the adjustable range hood filter; the oil smoke detection device is arranged in the range hood body, and is used to detect the oil smoke concentration.

[0014] Preferably, the first filter assembly is fixed on the range hood body, and one end of the second filter assembly is fixed on the first filter assembly, and the other end is connected to the filter adjustment assembly.

[0015] Preferably, the filter adjustment assembly includes a reduction gear motor and a position detection device. The reduction gear motor is fixed on the range hood body. The position detection device is arranged on the reduction gear motor for detecting the rotation angle of the reduction gear motor's rotating shaft. The reduction gear motor's rotating shaft is connected to one end of the second filter for adjusting the extension and retraction of the second filter assembly, thereby realizing the adjustment of the size and number of filter holes in the overlapping area.

[0016] A range hood control method comprises the following steps:

[0017] S1: Start the range hood, and the control module receives the instruction from the user;

[0018] S2: The control module determines whether the received instruction is a high-resistance high-filtration mode. If not, S3 is executed. If yes, the mesh size of the adjustable range hood filter is adjusted to the maximum.

[0019] S3: The control module determines whether the received instruction is a low-resistance, high-exhaust mode. If not, S4 is executed. If so, the mesh size of the adjustable range hood filter is adjusted to the minimum.

[0020] S4: The control module determines whether the received instruction is in automatic mode. If not, S5 is executed. If so, the oil fume detection device is started and the mesh size of the adjustable range hood filter is adjusted to a value suitable for the oil fume concentration according to the oil fume concentration detected by the oil fume detection device.

[0021] S5: The mesh size of the adjustable range hood filter remains unchanged. When a new instruction from the user is received, the process returns to S2.

[0022] Preferably, in S2, the mesh size of the adjustable range hood filter is adjusted to the maximum, specifically:

[0023] The control module controls the filter adjustment assembly to move so that the second filter is extended to its longest length, thereby making the filter holes in the overlapping area the smallest and the most numerous.

[0024] Preferably, in S3, the mesh size of the adjustable range hood filter is adjusted to the minimum, specifically:

[0025] The control module controls the filter adjustment assembly to retract the second filter to its original length, thereby maximizing or minimizing the filter holes in the overlapping area.

[0026] Preferably, in S4, the mesh size of the adjustable range hood filter is adjusted to a corresponding value according to the fume concentration, specifically:

[0027] The control module controls the operation of the filter adjustment component according to the oil smoke concentration detected in real time by the oil smoke detection device, so that the second filter is at a length corresponding to the oil smoke concentration, so that the size and number of the filter holes in the overlapping area correspond to the current oil smoke concentration.

[0028] The beneficial effect of adopting the above technical solution is that: the present invention makes the second filter component attached to the first filter component and can be stretched and retracted along its surface, so that the size and number of filter holes formed in the overlapping area of the first filter component and the second filter component can be variable. The user can adjust the mesh size of the range hood filter according to different requirements for the suction and exhaust effects and grease separation effects. The filter structure is simple and easy to adjust, which effectively improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0030] Figure 1 This is a schematic structural diagram of the adjustable range hood filter provided by Example 1 of the present invention when the mesh size is the smallest;

[0031] Figure 2 This is a schematic structural diagram of the adjustable range hood filter provided by Example 1 of the present invention when the mesh size is the largest;

[0032] Figure 3 is a schematic diagram of the overall structure of the range hood provided by Example 2 of the present invention;

[0033] Figure 4 2. It is a top view of a first filter assembly of an adjustable range hood filter in a range hood provided in Example 2 of the present invention;

[0034] Figure 5 is a top view of the second filter assembly of the adjustable range hood filter in the range hood provided by Example 2 of the present invention when extended;

[0035] Figure 6 This is a state diagram of the filter adjustment device when the mesh size of the adjustable range hood filter is at its maximum in the range hood provided by Example 2 of the present invention;

[0036] Figure 7 This is a state diagram of the filter adjustment device in the range hood provided by Example 2 of the present invention when the mesh size of the adjustable range hood filter is at a minimum;

[0037] Figure 8 This is a flow chart of the range hood control method provided in Example 3 of the present invention.

[0038] in:

[0039] 1. Adjustable range hood filter; 11. First filter assembly; 111. First filter strip; 112. First fixing rod; 113. Second fixing rod; 12. Second filter assembly; 121. Second filter strip; 122. Third fixing rod; 123. First movable rod; 124. Elastic member; 13. Filter hole; 2. Range hood body; 3. Filter adjustment assembly; 31. Reducer motor; 311. Rotating shaft; 32. Position detection device; 4. Oil fume detection device. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] In the description of the present invention, it should be clarified that the terms "vertical", "transverse", "longitudinal", "front", "rear", "left", "right", "up", "down", "horizontal", etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not mean that the device or element referred to must have a specific orientation or position. Therefore, they cannot be understood as limiting the present invention.

[0042] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0043] Example 1

[0044] Embodiment 1 of the present invention provides an adjustable range hood filter for a range hood, such as Figure 1 As shown, it includes a first filter assembly 11 and a second filter assembly 12. The second filter assembly 12 can be slidably attached to the surface of one side of the first filter assembly 11, and a plurality of filter holes 13 are formed in the overlapping area of the first filter assembly 11 and the second filter assembly 12. When the second filter assembly 12 is extended and retracted on the surface of the first filter assembly 11, the size and number of the filter holes 13 in the overlapping area change.

[0045] After adopting the above technical solution, by attaching the retractable second filter assembly 12 to the first filter assembly 11, when the second filter assembly 12 is retracted and expanded, the size and number of filter holes 13 per unit area (that is, the mesh size of the range hood filter) formed in the overlapping area of the first filter 11 and the second filter 12 can be changed. The user can adjust the mesh size of the range hood filter according to usage requirements, which is convenient and practical.

[0046] The so-called mesh number of the filter refers to the number of filter holes in the effective filtering area (i.e., the overlapping area in this embodiment). The area of the effective filtering area is certain, and the filter holes are evenly distributed in the area. The more filter holes, the larger the mesh number, and the smaller the area of each filter hole; the fewer filter holes, the smaller the mesh number, and the larger the area of each filter hole.

[0047] Specifically, the first filter assembly 11 includes a first fixing rod 112, a second fixing rod 113, and a plurality of first filter strips 111 arranged parallel to each other. The spacing between two adjacent first filter strips 111 is fixed and equal, and one end of each first filter strip 111 is connected to the first fixing rod 112 and the other end is connected to the second fixing rod 113. Using only two fixing rods to fix multiple first filter strips 111 is the simplest structure when having the same function and is convenient for later cleaning. Alternatively, a complete annular frame can be used to fix multiple first filter strips 111 therein.

[0048] It should be noted that the first filter screen assembly 11 may also adopt a structure in which the distance between two adjacent first filter strips 111 is adjustable.

[0049] Specifically, the second filter assembly 12 includes a third fixed rod 122, a first movable rod 123, an elastic member 124 and a plurality of second filter strips 121 arranged parallel to each other. The third fixed rod 122, the plurality of second filter strips 121 and the first movable rod 123 are arranged in parallel in sequence. The elastic member 124 is fixedly connected to the ends of the third fixed rod 122, the first movable rod 123 and the plurality of second filter strips 121 on the same side, and the elastic member 124 is retractable to adjust the distance between two adjacent second filter strips 121. The second filter strip 121 can slide relative to the first filter strip 111.

[0050] Furthermore, the third fixed rod 122 is fixedly connected to the first fixed rod 112, and the first movable rod 123 is movable in a direction parallel to the length of the first filter strips 111. When the above structure is adopted, the spacing between the second filter strips 121 can be adjusted by simply pulling the movable rod 123 to transmit the pulling force to the elastic member 124 to extend it. Alternatively, both the third fixed rod 122 and the first movable rod 123 can be designed to be movable. During adjustment, the spacing between the second filter strips 121 can be adjusted by applying two opposite forces to the third fixed rod and the first movable rod respectively.

[0051] Considering that the working environment of the filter is relatively high in temperature and there is a large amount of oil smoke, which will accelerate the aging and breakage of the rubber material, and at the same time, due to the small internal space of the range hood, there is not enough space for the second filter assembly 12 to stretch along a straight line, and rolling up the extended part can greatly save space, so the elastic member 14 must also be able to curl, so the elastic member 14 is preferably a thin and lightweight coil spring.

[0052] When adjusting, if Figure 2 As shown, when the elastic member 14 is stretched by tension, the spacing between the second filter strips 121 fixed on the elastic member 14 gradually increases, and the area of the overlapping region remains unchanged (equal to the area of the first filter assembly). Then, the number of the second filter strips 121 located in the overlapping region gradually decreases, while the number and spacing of the first filter strips 111 located below remain unchanged, so that the filter holes 13 formed in the overlapping region become larger while the number is also decreasing, that is, the mesh size of the filter is decreasing.

[0053] In order to ensure that when the second filter assembly 12 is at its original length (i.e., the elastic member 124 is not under tension), the second filter strips 121 in the overlapping area do not interfere with each other, and the filter holes 13 can be evenly distributed, the length of the second filter assembly 12 must be greater than or equal to the length of the first filter assembly 11. At this time, the filter holes (13) in the overlapping area are the smallest and the largest.

[0054] In order to facilitate cleaning, the first filter assembly 11 and the second filter assembly 12 are preferably made of stainless steel.

[0055] Example 2

[0056] Embodiment 2 of the present invention provides a range hood, such as Figure 3 As shown, it includes the adjustable range hood filter 1, the range hood body 2, the control module, and the filter adjustment component 3 and the oil smoke detection device 4 respectively connected to the control module as described in the above embodiment 1; wherein, the adjustable range hood filter 1 is installed in the range hood body 2 and covers the smoke inlet, the filter adjustment component 3 is arranged in the range hood body 2 and connected to the adjustable range hood filter 1, and is used to adjust the adjustable range hood filter 1, and the oil smoke detection device 4 is arranged in the range hood body 2, and is used to detect the oil smoke concentration.

[0057] After adopting the above technical solution, users can adjust the mesh size of the range hood filter according to their needs. When they want a better suction and exhaust effect, they only need to adjust the mesh size of the adjustable range hood filter 1 to a smaller size. When they want a better grease separation effect, they only need to adjust the mesh size of the adjustable range hood filter 1 to a larger size. It is convenient and practical, and the user experience is better.

[0058] Specifically, the first filter assembly 11 is fixed to the range hood body 2, and one end of the second filter assembly 12 is fixed to the first filter assembly 11, and the other end is detachably connected to the filter adjustment assembly 3. The filter adjustment assembly 3 includes a reduction gear motor 31 and a position detection device 32. The position detection device 32 is arranged on the reduction gear motor 31, and is used to detect the rotation angle of the rotating shaft 311 of the reduction gear motor 31. The rotation angle of the rotating shaft 311 starting from the initial position corresponds to the length of the second filter assembly 12. The rotating shaft 311 of the reduction gear motor 31 is detachably connected to the second filter 12, and is used to adjust the extension and contraction of the second filter assembly 12, thereby realizing the adjustment of the size and number of the filter holes 13 in the overlapping area. Among them, as Figure 6 As shown, when the rotating shaft 311 is in the initial position, the second filter assembly 12 is in the original length.

[0059] Specifically, the rotation angle of the rotating shaft 311 can be matched with the elongation of the second filter assembly 12. When the rotation angle of the rotating shaft 311 is 0°, the second filter assembly 12 is at its original length and the elongation is 0. When the rotation angle of the rotating shaft 311 reaches the maximum value β MAX (β MAX >0), the elongation reaches the maximum value ΔL MAX (ΔL MAX >0).

[0060] like Figure 7 As shown, when the filter mesh size needs to be adjusted to a smaller size, the control module controls the reduction gear motor 31 to rotate forward, which is equivalent to transmitting the generated torque to the second filter assembly 12 through the rotating shaft 311 and converting it into a pulling force acting on the elastic member 124. The second filter assembly 12 stretches, and the stretched part is wrapped around the rotating shaft 311 ( Figure 5 The portion within the dotted box is the portion of the second filter assembly 12 that is stretched and wound around the rotating shaft 311), the spacing between two adjacent second filter strips 121 in the overlapping area becomes larger, and the second filter strips 121 in the overlapping area also decrease, thereby making the filter holes 13 in the overlapping area larger and fewer, and the mesh count of the filter screen reduced.

[0061] like Figure 6 As shown, when the mesh size of the filter needs to be increased, the control module controls the reduction gear motor 31 to reverse, and the part of the filter assembly 12 wound on the rotating shaft 311 is unfolded, the tension on the elastic member 124 is reduced, and the second filter assembly 12 is gradually shortened to its original length. The distance between the two adjacent second filter strips 121 in the overlapping area becomes smaller, and the number of second filter strips 121 in the overlapping area is also increased, so that the filter holes 13 in the overlapping area become smaller and more, and the mesh size of the filter increases.

[0062] Furthermore, the mesh size of the filter can be adjusted according to the oil smoke concentration detected by the oil smoke detection device 4.

[0063] Example 3

[0064] Embodiment 2 of the present invention provides a range hood control method, such as Figure 8 As shown, the following steps are included:

[0065] S1: Start the range hood, and the control module receives the instruction from the user;

[0066] S2: The control module determines whether the received instruction is a high-resistance high-filtration mode. If not, S3 is executed. If yes, the mesh size of the adjustable range hood filter (1) is adjusted to the maximum, specifically:

[0067] The control module controls the filter adjustment assembly (3) to operate so that the second filter (12) is extended to its longest length, thereby minimizing and maximizing the number of filter holes (13) in the overlapping area.

[0068] S3: The control module determines whether the received instruction is a low-resistance, high-exhaust mode. If not, S4 is executed. If yes, the mesh size of the adjustable range hood filter (1) is adjusted to the minimum, specifically:

[0069] The control module controls the filter adjustment assembly (3) to operate, causing the second filter (12) to retract to its original length, thereby maximizing or minimizing the number of filter holes (13) in the overlapping area.

[0070] S4: The control module determines whether the received instruction is in automatic mode. If not, S5 is executed. If yes, the control module starts the oil smoke detection device and adjusts the mesh size of the adjustable range hood filter (1) to a value suitable for the oil smoke concentration according to the oil smoke concentration detected by the oil smoke detection device, specifically:

[0071] The control module controls the filter adjustment component (3) to operate according to the oil smoke concentration detected in real time by the oil smoke detection device (4), so that the second filter (12) is at a length corresponding to the oil smoke concentration, thereby making the size and number of the filter holes (13) in the overlapping area correspond to the current oil smoke concentration.

[0072] S5: The mesh size of the adjustable range hood filter (1) remains unchanged. When a new instruction from the user is received, the process returns to S2.

[0073] The present invention enables the second filter assembly to be attached to the first filter assembly and to be able to expand and contract along its surface, so that the size and number of filter holes formed in the overlapping area of the first filter assembly and the second filter assembly can be variable. Users can adjust the mesh size of the range hood filter according to different requirements for suction and exhaust effects and grease separation effects. The filter structure is simple and easy to adjust, which effectively improves the user experience.

[0074] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An adjustable range hood filter, characterized in that: The invention relates to a filter screen component comprising a first filter screen component (11) and a second filter screen component (12), wherein the second filter screen component (12) is slidably attached to a side surface of the first filter screen component (11), and a plurality of filter holes (13) are formed in an overlapping area between the first filter screen component (11) and the second filter screen component (12). When the second filter screen component (12) is extended or retracted, the size and number of the filter holes (13) in the overlapping area change; the first filter screen component (11) comprises a first fixing rod (112), a second fixing rod (113) and a plurality of first filter strips (111) arranged parallel to each other, the spacing between two adjacent first filter strips (111) is fixed, one end of each first filter strip (111) is connected to the first fixing rod (112), and the other end is connected to the second fixing rod (113); the second filter screen component (12) comprises a third fixing rod (122) and a plurality of first filter strips (111) arranged parallel to each other, the spacing between two adjacent first filter strips (111) is fixed, and ... the two adjacent first filter strips (111) is fixed, and one end of each first filter strip (111) is connected to the first fixing rod (112), and the other end ), a first movable rod (123), an elastic member (124) and a plurality of second filter strips (121) arranged in parallel with each other, the third fixed rod (122), the plurality of second filter strips (121) and the first movable rod (123) are arranged in parallel in sequence, the elastic member (124) is fixedly connected to the ends of the third fixed rod (122), the first movable rod (123) and the plurality of second filter strips (121) located on the same side, the elastic member (124) is retractable and used to adjust the distance between two adjacent second filter strips (121), and the second filter strips (121) can slide relative to the first filter strip (111); the elastic member (124) is curlable, and when the elastic member (124) is not subjected to tension, the length of the second filter screen component (12) is greater than or equal to the length of the first filter screen component (11), and the filter holes (13) in the overlapping area are the smallest and the largest.

2. The adjustable range hood filter according to claim 1, characterized in that: The third fixed rod (122) is fixedly connected to the first fixed rod (112), and the first movable rod (123) can move in a direction parallel to the length of the first filter strip (111).

3. A range hood, characterized in that: The invention comprises the adjustable range hood filter (1) as claimed in claim 1 or 2, a range hood body (2), a control module, and a filter adjustment component (3) and an oil smoke detection device (4) respectively connected to the control module; the adjustable range hood filter (1) is installed in the range hood body (2) and covers the smoke inlet; the filter adjustment component (3) is arranged in the range hood body (2) and connected to the adjustable range hood filter (1) for adjusting the adjustable range hood filter (1); the oil smoke detection device (4) is arranged in the range hood body (2) for detecting the oil smoke concentration.

4. The range hood according to claim 3, characterized in that: The first filter assembly (11) is fixed on the range hood body (2); one end of the second filter assembly (12) is fixed on the first filter assembly (11), and the other end is connected to the filter adjustment assembly (3).

5. The range hood according to claim 4, characterized in that: The filter adjustment assembly (3) comprises a reduction gear motor (31) and a position detection device (32). The reduction gear motor (31) is fixed on the range hood body (2). The position detection device (32) is arranged on the reduction gear motor (31) and is used to detect the rotation angle of the rotating shaft (311) of the reduction gear motor (31). The rotating shaft (311) of the reduction gear motor (31) is connected to one end of the second filter assembly (12) and is used to adjust the extension and contraction of the second filter assembly (12), thereby achieving adjustment of the size and number of the filter holes (13) in the overlapping area.

6. A range hood control method, characterized in that: The range hood according to any one of claims 3 to 5 is used, comprising the following steps: S1: Start the range hood, and the control module receives the instruction from the user; S2: The control module determines whether the received instruction is a high-resistance high-filtration mode. If not, S3 is executed. If yes, the mesh size of the adjustable range hood filter (1) is adjusted to the maximum. S3: The control module determines whether the received instruction is a low-resistance, high-exhaust mode. If not, S4 is executed. If yes, the mesh size of the adjustable range hood filter (1) is adjusted to the minimum. S4: The control module determines whether the received instruction is in automatic mode. If not, S5 is executed. If so, the control module starts the oil smoke detection device and adjusts the mesh size of the adjustable range hood filter (1) to a value suitable for the oil smoke concentration according to the oil smoke concentration detected by the oil smoke detection device. S5: The mesh size of the range hood filter (1) can be adjusted to remain unchanged. When a new instruction from the user is received, the process returns to S2.

7. The range hood control method according to claim 6, characterized in that: In said S2, the mesh size of the adjustable range hood filter (1) is adjusted to the maximum, specifically: The control module controls the action of the filter adjustment component (3) to extend the second filter component (12) to its longest length, thereby minimizing and maximizing the number of filter holes (13) in the overlapping area.

8. The range hood control method according to claim 6 or 7, characterized in that: In said S3, the mesh size of the adjustable range hood filter (1) is adjusted to the minimum, specifically: The control module controls the filter adjustment component (3) to operate, causing the second filter component (12) to retract to its original length, thereby maximizing or minimizing the number of filter holes (13) in the overlapping area.

9. The range hood control method according to claim 8, characterized in that: In said S4, the mesh size of said adjustable range hood filter (1) is adjusted to a corresponding value according to the fume concentration, specifically: The control module controls the operation of the filter adjustment component (3) based on the oil smoke concentration detected in real time by the oil smoke detection device (4), so that the second filter component (12) is at a length corresponding to the oil smoke concentration, thereby making the size and number of the filter holes (13) in the overlapping area correspond to the current oil smoke concentration.

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