An oil fume filtering module, an oil fume extractor, a control method, a device and a storage medium

Abstract

The application discloses an oil fume filtering module, an oil fume extractor, a control method, equipment and a storage medium, and relates to the technical field of kitchen appliances. The oil fume filtering module comprises a shell, a fixing piece and two filtering assemblies. The top surface of the shell is provided with an air outlet, and the bottom surface of the shell is provided with an opening opposite to the air outlet. The fixing piece is fixedly arranged in the shell and divides the opening into a first air inlet and a second air inlet. The filtering assembly comprises an elastic filter screen and a driving piece. The elastic filter screen has a ventilation gap. One end of the elastic filter screen of each filtering assembly is fixedly connected with the fixing piece and located on the two sides of the fixing piece. The other end of the elastic filter screen is fixedly connected with the driving piece. The driving piece can make the elastic filter screen stretch and retract to change the size of the ventilation gap. One elastic filter screen covers the first air inlet, and the other elastic filter screen covers the second air inlet. The oil fume filtering module can adjust the filtering capacity of the filtering assembly according to the oil fume content, thereby improving the filtering effect.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to an oil fume filtration module, a range hood, a control method, equipment, and a storage medium. Background Technology

[0002] After several years of use, range hoods on the market often develop severe grease buildup in their casings and impellers. This grease affects the casing's curves, leading to blockages and increased load. Grease buildup inside the impeller also affects airflow and pressure, impacting the range hood's performance. Furthermore, grease buildup inside the impeller can cause unpleasant odors, affecting kitchen air quality and people's health. Therefore, cleaning the range hood is necessary.

[0003] Currently, the front-end oil fume filtration method of range hoods mainly uses flat oil filters with a fixed shape. The oil fume filtration performance is also designed and determined according to the maximum air volume. When the range hood is in other settings, the oil fume filtration performance cannot be well matched, resulting in a reduction in filtration effect.

[0004] To address the aforementioned issues, it is necessary to develop an oil fume filtration module, a range hood, a control method, equipment, and a storage medium to solve the problem of poor oil fume filtration performance. Summary of the Invention

[0005] The purpose of this invention is to provide an oil fume filtration module, a range hood, a control method, an equipment, and a storage medium. The oil fume filtration module can adjust the filtration capacity of the filtration components according to the oil fume content, thereby improving the filtration effect.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An oil fume filtration module, comprising:

[0008] The housing has an air outlet on its top surface and an opening on its bottom surface that is directly opposite the air outlet.

[0009] The fastener is fixedly installed inside the housing to divide the opening into a first air inlet and a second air inlet;

[0010] Two filter components with ventilation gaps are provided. One filter component covers the first air inlet, and the other filter component covers the second air inlet. Both filter components can change the size of the ventilation gaps.

[0011] In some embodiments, the filter assembly includes an elastic filter and a drive member. The elastic filter has a ventilation gap. One end of the elastic filter of both filter assemblies is fixedly connected to a fixing member, and the drive member is fixedly connected to the other end of the corresponding elastic filter. The drive member can extend and retract the elastic filter to change the size of the ventilation gap.

[0012] In some embodiments, the resilient filter includes a plurality of springs arranged side by side.

[0013] In some embodiments, the spring portion engages within the gap between adjacent springs.

[0014] In some embodiments, the filter assembly further includes a retaining rod, with one end of a plurality of springs sleeved on the retaining rod.

[0015] In some embodiments, the fixing rod is provided with a plurality of fixing grooves spaced apart along the axial direction, and one end of the spring is sleeved in the corresponding fixing groove.

[0016] In some embodiments, the filter assembly further includes a hook, both ends of which are sleeved on a fixed rod, and the drive member drives the fixed rod to move via the hook.

[0017] In some embodiments, the filter assembly further includes a reel and a rope, the reel being rotatably disposed within the housing, one end of the rope being wound around the reel, and the other end of the rope being connected to a fixed rod, and a drive member being configured to drive the reel to rotate; or

[0018] The filter assembly also includes a hook, a reel, and a rope. Both ends of the hook are fitted onto a fixed rod. The reel is rotatably mounted inside the housing. One end of the rope is wound around the reel, and the other end of the rope is connected to the hook. A drive unit is configured to drive the reel to rotate.

[0019] In some embodiments, guide rails are provided on two opposing inner walls of the housing, and the guide rails have grooves. The end of the fixing rod is slidably disposed in the groove of the corresponding guide rail.

[0020] In some embodiments, the guide rail includes a guide portion and a fixing portion, the guide portion is connected to the fixing portion, the fixing portion is fixedly disposed on the inner wall of the housing, the guide portion is spaced apart from the inner wall of the housing, and a groove is formed on the guide portion.

[0021] In some embodiments, the fastener includes two fixing plates, each fixing plate having a plurality of fixing holes spaced apart along its length, each elastic filter screen being fixedly connected to a corresponding fixing plate, and each elastic filter screen having a plurality of springs hooked into a corresponding fixing hole.

[0022] In some embodiments, the two fixing plates are arranged at an angle to form a V-shaped groove, and an oil guide hole is provided at the bottom of the V-shaped groove.

[0023] In some embodiments, the housing includes a top cover, a middle frame, and a bottom plate, with an air outlet on the top cover and an opening on the bottom plate.

[0024] In some embodiments, the middle frame is provided with an inwardly protruding oil-blocking rib, which extends along the stretching direction of the elastic filter and is spaced apart from the elastic filter.

[0025] In some embodiments, the base plate is inclined downward in a front-to-back direction, and an oil leakage hole is provided at the rear end of the base plate.

[0026] A range hood includes a housing, a fan, and an oil fume filter module. The housing has an air inlet, the fan is configured to generate negative pressure at the air inlet, and the oil fume filter module is located upstream of the fan in the oil fume flow path.

[0027] A control method for a range hood, used to control the range hood, the control method comprising:

[0028] Start the fan;

[0029] The driving component stretches the corresponding elastic filter screen to its initial state;

[0030] The oil fume concentration C1 upstream of the first air inlet and the oil fume concentration C2 upstream of the second air inlet are detected respectively, and the concentration ranges of C1 and C2 are determined.

[0031] The drive unit stretches or retracts the corresponding elastic filter screen according to C1 and C2 to adjust the ventilation gap of the elastic filter screen.

[0032] In some embodiments, the control method includes a first preset concentration Ca, where if C1 < Ca, a drive unit located at the first air inlet stretches the corresponding elastic filter to increase the ventilation gap, and / or, if C2 < Ca, a drive unit located at the second air inlet stretches the corresponding elastic filter to increase the ventilation gap.

[0033] In some embodiments, the control method includes a second preset concentration Cb, wherein if Ca≤C1<Cb, the ventilation gap of the elastic filter at the first air inlet is kept unchanged, and / or, if Ca≤C2<Cb, the ventilation gap of the elastic filter at the second air inlet is kept unchanged.

[0034] In some embodiments, if C1≥Cb, the drive unit located at the first air inlet causes the corresponding elastic filter to retract to reduce the ventilation gap, and / or, if C2≥Cb, the drive unit located at the second air inlet causes the corresponding elastic filter to retract to reduce the ventilation gap.

[0035] In some embodiments, the method further includes: after adjusting the ventilation gap of the elastic filter, cyclically detecting the oil fume concentration C1 upstream of the first air inlet and the oil fume concentration C2 upstream of the second air inlet, and determining whether they are equal to the concentration values ​​detected previously. If they are not equal, the corresponding elastic filter is stretched or retracted according to C1 and C2 to adjust the ventilation gap of the elastic filter.

[0036] In some embodiments, if they are equal, the gas velocity V1 downstream of the first air inlet and the gas velocity V2 downstream of the second air inlet are detected, and the average velocity V3 is calculated, V3 = (V1 + V2) / 2, and the range in which V3 is located is determined. The fan speed is adjusted according to V3.

[0037] In some embodiments, the control method includes a first preset flow rate Vm, and if V3 < Vm, the fan speed is adjusted to the stir-fry setting.

[0038] In some embodiments, the control method includes a second preset flow rate Vn, and if Vm≤V3<Vn, the fan speed is adjusted to the high setting.

[0039] In some embodiments, if V3 ≥ Vn, the fan speed is adjusted to a lower setting.

[0040] In some embodiments, the method further includes: after adjusting the fan speed, cyclically detecting the gas flow velocity V1 downstream of the first air inlet and the gas flow velocity V2 downstream of the second air inlet, recalculating V3, and determining whether it is equal to the average gas flow velocity detected previously. If they are not equal, the fan speed is readjusted according to V3.

[0041] In some embodiments, if the recalculated V3 is equal to the previously detected average gas flow rate, the fan speed is kept constant.

[0042] An apparatus, comprising:

[0043] One or more processors;

[0044] Storage device for storing one or more programs;

[0045] When one or more programs are executed by one or more processors, the control methods implemented by the one or more processors are enabled.

[0046] A computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor and a control method is implemented thereon.

[0047] The beneficial effects of this invention are:

[0048] This invention provides an oil fume filtration module, a range hood, a control method, equipment, and a storage medium. In the oil fume filtration module, two filtration components correspond to a first air inlet and a second air inlet, respectively. By adjusting the size of the corresponding ventilation gap, the filtration capacity for oil fumes can be changed. When the elastic filter is in its initial state, it is stretched to maintain a certain ventilation gap. When there is a lot of oil fume, the driving component causes the elastic filter to retract, reducing the ventilation gap and thus improving the filtration effect, suitable for stir-frying and similar situations. When the oil fume is moderate, the driving component remains stationary, and the filtration effect of the elastic filter remains unchanged, maintaining a certain filtration and ventilation effect, suitable for ordinary stir-frying and similar situations. When there is little oil fume, the driving component stretches the elastic filter to increase the ventilation gap, thus improving the ventilation effect, suitable for steaming, boiling, and other situations with less oil fume.

[0049] This oil fume filtration module can adjust the filtration capacity of the filter components according to the oil fume content, thereby improving the filtration effect. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the structure of the range hood provided by the present invention;

[0051] Figure 2 The explosion of the oil fume filtration module provided by this invention Figure 1 ;

[0052] Figure 3 The explosion of the oil fume filtration module provided by this invention Figure 2 ;

[0053] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0054] Figure 5 This is a schematic diagram of the structure of the fixing rod provided by the present invention;

[0055] Figure 6 This is a structural schematic diagram of the fastener provided by the present invention;

[0056] Figure 7 This is a side sectional view of the range hood provided by the present invention;

[0057] Figure 8 This is a schematic diagram of the guide rail provided by the present invention;

[0058] Figure 9 This is a front perspective view of the range hood provided by the present invention;

[0059] Figure 10 This is a flowchart of the control method provided by the present invention;

[0060] Figure 11 This is a schematic diagram of the device provided by the present invention.

[0061] In the picture:

[0062] 100. Range hood;

[0063] 1. Outer casing; 11. Air inlet;

[0064] 2. Fume Filter Module; 21. Housing; 211. Top Cover; 2111. Air Outlet; 2112. First Enclosure; 212. Middle Frame; 2121. Oil Baffle Rib; 213. Base Plate; 2131. Opening; 2132. Second Enclosure; 2133. Oil Drain Hole; 22. Fixing Component; 221. Fixing Plate; 222. Fixing Hole; 223. Oil Guide Hole; 23. Filter Assembly; 231. Elastic Filter Screen; 2311. Spring; 232. Driving Component; 233. Fixing Rod; 2331. Fixing Groove; 2332. Limiting Part; 234. Hook; 235. Winding Reel; 236. Rope; 237. Fixing Bracket; 24. Guide Rail; 241. Fixing Part; 242. Guide Part; 243. Slide Groove; 244. Clearance Groove;

[0065] 3. Oil cup;

[0066] 41. First oil fume sensor; 42. Second oil fume sensor;

[0067] 51. First wind speed sensor; 52. Second wind speed sensor;

[0068] 120. Device; 140. External device; 160. Processing unit; 180. Bus; 200. Network adapter; 220. I / O interface; 240. Display; 280. System memory; 300. Random access memory; 320. Cache memory; 340. Storage system; 400. Program / utility; 420. Program module. Detailed Implementation

[0069] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0070] 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.

[0071] Unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" 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 connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0072] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0073] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0074] Example 1

[0075] This embodiment provides a range hood, such as Figure 1 As shown, the range hood 100 includes a housing 1 and a fan. The housing 1 has an air inlet 11, and the fan is configured to generate negative pressure at the air inlet 11, thereby drawing air from outside the range hood 100 into the air inlet 11. In this embodiment, the range hood 100 can be a top-mounted range hood or a side-mounted range hood, or alternatively, any other type of range hood.

[0076] Understandably, the range hood contains cooking fumes. After several years of use, the volute and impeller of the range hood 100 accumulate significant amounts of grease. This grease affects the volute's profile, causing blockages and increased load on the range hood. The grease buildup inside the impeller also affects the airflow and pressure, impacting the range hood's performance. Furthermore, the grease buildup inside the impeller causes unpleasant odors, affecting kitchen air quality and people's health. Therefore, cleaning the range hood 100 is necessary.

[0077] In order to filter the oil fumes in the gas, the range hood 100 also includes an oil fume filter module 2, which is located upstream of the fan in the oil fume flow path. That is to say, after the gas outside the range hood 100 enters the outer casing 1 through the air inlet 11, it will be filtered by the oil fume filter module 2 before passing through the fan, which greatly reduces the oil accumulation in the volute, impeller and other parts, avoids the generation of odors, and can also reduce the cleaning frequency.

[0078] The existing range hood filter modules mainly use flat oil screens with a fixed shape. The oil fume filtration performance is also designed and determined according to the maximum air volume. When the range hood is in other settings, the oil fume filtration performance cannot be well matched with the air volume, resulting in a reduction in the filtration effect.

[0079] To address the aforementioned problems, this embodiment provides an oil fume filtration module 2, such as... Figure 2 and Figure 3 As shown, the fume filtration module 2 includes a housing 21, a fixing member 22, and two filter components 23. The top surface of the housing 21 has an air outlet 2111, and the bottom surface of the housing 21 has an opening 2131 directly opposite the air outlet 2111. The fixing member 22 is fixedly installed inside the housing 21 to divide the opening 2131 into a first air inlet and a second air inlet. The filter components 23 have ventilation gaps; one filter component 23 covers the first air inlet, and the other filter component 23 covers the second air inlet. Both filter components 23 can change the size of the ventilation gap.

[0080] The first and second air inlets correspond to the two burners of the gas stove. Since the two burners can perform different types of cooking at the same time, filter components 23 need to be installed at both the first and second air inlets. It can be understood that the filter components 23 can adjust the filtration and ventilation capabilities by adjusting the size of the ventilation gap on the cover. Increasing the ventilation gap will reduce the filtration capability and increase the ventilation capability, while decreasing the ventilation gap will increase the filtration capability and decrease the ventilation capability. Therefore, the range hood can adjust to a suitable ventilation gap according to the cooking type of the corresponding burner.

[0081] Specifically, the filter assembly 23 includes an elastic filter screen 231 and a drive member 232. The elastic filter screen 231 has a ventilation gap. One end of the elastic filter screen 231 of both filter assemblies 23 is fixedly connected to the fixing member 22. The drive member 232 is fixedly connected to the other end of the corresponding elastic filter screen 231. The drive member 232 can make the elastic filter screen 231 extend and retract to change the size of the ventilation gap.

[0082] In the fume filtration module 2, two filter components 23 correspond to the first and second air inlets, respectively. By adjusting the size of the corresponding ventilation gaps, the filtration capacity for fumes can be changed. After the range hood 100 is started, the drive component 232 stretches the elastic filter 231, causing it to maintain a certain ventilation gap. It is understandable that most users' cooking operations are ordinary stir-frying; therefore, after the range hood 100 is started, the ventilation gap of the elastic filter 231 is suitable for the amount of fumes from ordinary stir-frying.

[0083] When there is a lot of oil smoke, the drive component 232 reduces the force that stretches the elastic filter 231, causing the elastic filter 231 to retract and reduce the ventilation gap, thereby improving the filtration effect of the oil smoke, which is suitable for stir-frying and other similar situations. When the oil smoke is moderate, the drive component 232 remains stationary, and the filtration effect of the elastic filter 231 remains unchanged, maintaining a certain filtration and ventilation effect, which is suitable for ordinary stir-frying and other similar situations. When there is little oil smoke, the drive component 232 increases the force that stretches the elastic filter 231, causing the elastic filter 231 to stretch and increase the ventilation gap, thereby improving the ventilation effect, which is suitable for steaming, boiling and other situations with less oil smoke.

[0084] The fume filtration module 2 can adjust the filtration capacity of the filter component 23 according to the fume content, thereby improving the filtration effect. Specifically, both filter components 23 can adjust the stretching degree of the elastic filter screen 231 according to the cooking type of the corresponding stove, thereby obtaining the fume filtration capacity and ventilation capacity that match the cooking type of the stove.

[0085] like Figure 3 and Figure 4 As shown, the elastic filter 231 includes multiple springs 2311 arranged side by side. The gaps between the spiral structures of the springs 2311 constitute the ventilation gaps. The springs 2311 can adjust the size of these ventilation gaps by extending and retracting, thereby regulating the filtration capacity for cooking fumes. When the springs 2311 are stretched, the ventilation gaps increase, reducing the filtration capacity of the elastic filter 231 while increasing ventilation. When the springs 2311 retract, the ventilation gaps decrease, increasing the filtration capacity of the elastic filter 231. Most of the cooking fumes adhere to the springs 2311, requiring only periodic cleaning of the elastic filter 231.

[0086] like Figure 4As shown, a portion of spring 2311 is inserted into the gap between adjacent springs 2311. The helical structure of spring 2311 has gaps. The insertion of a portion of the helical structure of one spring 2311 between the helical structures of adjacent springs 2311 makes the structure of the elastic filter 231 more compact and minimizes the ventilation gap when the elastic filter 231 retracts, thereby improving its ability to filter oil fumes.

[0087] Because the helical structure of spring 2311 is inserted between the helical structures of two adjacent springs 2311, the multiple springs 2311 of the elastic filter screen 231 need to be stretched synchronously; otherwise, interference or jamming may occur. To solve this problem, the filter assembly 23 also includes a fixing rod 233, with one end of each spring 2311 sleeved on the fixing rod 233. The drive unit 232 only needs to be connected to the fixing rod 233, and the multiple springs 2311 of the same elastic filter screen 231 can be driven synchronously through the fixing rod 233.

[0088] like Figure 4 and Figure 5 As shown, the fixing rod 233 has multiple fixing slots 2331 spaced apart along the axial direction, and one end of the spring 2311 is sleeved in the corresponding fixing slot 2331. The end of the spring 2311 is bent to form a hook part, which can be sleeved on the fixing rod 233 and snapped into the corresponding fixing slot 2331, so that there will be no relative displacement between the multiple springs 2311 and the fixing rod 233 along the axial direction of the fixing rod 233, thereby ensuring the stability of the relative position of the multiple springs 2311 and thus ensuring the stability of the ventilation gap size.

[0089] like Figure 3 As shown, the filter assembly 23 also includes a hook 234, with both ends of the hook 234 sleeved on the fixed rod 233. The driving component 232 drives the fixed rod 233 to move through the hook 234. Since both ends of the hook 234 are connected to the fixed rod 233, the driving component 232 only needs to drive the hook 234 to ensure that the fixed rod 233 is under balanced force, keeping the fixed rod 233 perpendicular to the extension and retraction direction of the spring 2311, thereby improving the consistency of the extension and retraction of the multiple springs 2311.

[0090] Furthermore, the hook 234 and the fixing rod 233 form an obtuse triangle. It is understood that the connection point between the drive component 232 and the hook 234 will straighten the portion of the hook 234 located on both sides of that connection point. Therefore, the hook 234 and the fixing rod 233 form a triangle. When this triangle is an obtuse triangle, the distance between the two ends of the hook 234 is greater, which can further ensure the balance of force on the fixing rod 233.

[0091] In this embodiment, the filter assembly 23 further includes a reel 235 and a rope 236. The reel 235 is rotatably disposed within the housing 21. One end of the rope 236 is wound around the reel 235, and the other end of the rope 236 is connected to a hook 234. A drive unit 232 is configured to drive the reel 235 to rotate. The drive unit 232 is a motor, which can drive the reel 235 to rotate, thereby realizing the winding and unwinding of the rope 236. When the reel 235 winds up the rope 236, it pulls multiple springs 2311 through the fixed rod 233. When the reel 235 releases the rope 236, the springs 2311 retract due to their own elasticity. During the retraction process, the springs 2311 remain in a taut state.

[0092] In some embodiments, the other end of the rope 236 can be directly connected to the fixed rod 233. When the reel 235 rotates, the fixed rod 233 is directly driven to move via the rope 236, thereby synchronously driving multiple springs 2311 of the same elastic filter screen 231. This structure eliminates the need for the hook 234, thus reducing costs.

[0093] In some embodiments, the driving element 232 can also be a cylinder or an electric cylinder, with the output end of the cylinder or electric cylinder connected to the hook 234 via a rope 236 or a rod, which can also drive the fixed rod 233 to move. In other embodiments, the driving element 232 can also be other forms of driving structure, as long as it can drive the fixed rod 233 to move in a straight line, which will not be elaborated here.

[0094] The fume filtration module 2 also includes a fixed bracket 237, which comprises two spaced-apart partitions. A winding reel 235 is rotatably positioned between the two partitions. A motor is fixedly connected to one of the partitions, and the motor's output shaft passes through the partition and is fixedly connected to the winding reel 235. The fixed bracket 237 can fix the relative position between the winding reel 235 and the motor, thereby ensuring the stability and accuracy of the rotation of the winding reel 235.

[0095] like Figure 6 As shown, the fixing member 22 includes two fixing plates 221. The fixing plates 221 have multiple fixing holes 222 spaced apart along their length. Each elastic filter screen 231 is fixedly connected to its corresponding fixing plate 221, and multiple springs 2311 of each elastic filter screen 231 are hooked into the corresponding fixing holes 222. The springs 2311 in the two elastic filter screens 231 are only hooked onto their corresponding fixing plates 221, preventing the two elastic filter screens 231 from affecting each other. This ensures the accuracy of individually controlling the ventilation gap of each elastic filter screen 231.

[0096] In this embodiment, two fixing plates 221 are arranged at an included angle to form a V-shaped groove, and an oil guide hole 223 is provided at the bottom of the V-shaped groove. The two fixing plates 221 arranged at an included angle can avoid interfering with each other when they are engaged with the corresponding spring 2311, and oil droplets dripping from the top of the fixing member 22 can flow along the extension direction of the V-shaped groove to the oil guide hole 223 and then flow out from the oil guide hole 223, ensuring the cleanliness of the fixing member 22.

[0097] like Figure 7 As shown, the base plate 213 is inclined downwards from front to back, and an oil drain hole 2133 is provided at the rear end of the base plate 213. Oil flowing out through the oil guide hole 223 drips onto the base plate 213, and the inclined base plate 213 allows the oil to flow towards the rear end and out of the housing 21 through the oil drain hole 2133. To simplify the structure, the oil drain hole 2133 is located directly below the oil guide hole 223, so that oil droplets dripping from the oil guide hole 223 can directly pass through the oil drain hole 2133.

[0098] In this embodiment, the range hood also includes an oil cup 3, which is located at the bottom of the base plate 213 and directly opposite the oil drain hole 2133. At this time, the oil droplets dripping from the oil guide hole 223 and the oil dripping from the base plate 213 can drip into the oil cup 3, avoiding contamination of the outer shell 1. Users only need to clean the oil cup 3 regularly.

[0099] like Figure 8 As shown, due to the weight of the spring 2311, its end is more prone to sinking, causing the elastic filter 231 to deform and thus affecting the ventilation gap. To solve this problem, guide rails 24 are provided on two opposing inner walls of the housing 21. Each guide rail 24 has a groove 243, and the end of the fixing rod 233 is slidably positioned within the corresponding groove 243 of the guide rail 24. The groove 243 guides the fixing rod 233, preventing it from sinking and ensuring that it can only move along the direction of the groove 243, thereby keeping the elastic filter 231 horizontal.

[0100] like Figure 8 As shown, the guide rail 24 includes a guide portion 242 and a fixing portion 241. The guide portion 242 is connected to the fixing portion 241, and the fixing portion 241 is fixedly disposed on the inner wall of the housing 21. The guide portion 242 is spaced apart from the inner wall of the housing 21, and a sliding groove 243 is formed on the guide portion 242. The guide rail 24 is connected to the inner wall of the housing 21 through the fixing portion 241. The fixing portion 241 can support the guide portion 242, so that the guide portion 242 is spaced apart from the inner wall of the housing 21, so that the end of the fixing rod 233 passes through the sliding groove 243 and is located between the guide portion 242 and the inner wall of the housing 21, thereby improving the stability of the fixing rod 233 when moving along the sliding groove 243 and preventing the end of the fixing rod 233 from coming out of the sliding groove 243.

[0101] like Figure 5 and Figure 8 As shown, a limiting part 2332 protrudes radially from the end of the fixing rod 233, and a relief groove 244 is formed on the inner wall of one end of the sliding groove 243. When the end of the fixing rod 233 is inserted into the sliding groove 243, the limiting part 2332 passes through the relief groove 244. The limiting part 2332 can prevent the end of the fixing rod 233 from disengaging from the sliding groove 243 when the fixing rod 233 slides along the sliding groove 243. In this embodiment, the limiting part 2332 is a circumferentially extending limiting boss, and the diameter of the relief groove 244 is larger than the outer diameter of the limiting boss, so that the limiting boss can pass through the relief groove 244. In other embodiments, the limiting part 2332 can also be a limiting post. In this case, the slide groove 243 may not have an avoidance groove 244. By rotating the fixing rod 233, the extension direction of the limiting post is the same as the extension direction of the slide groove 243. After the fixing rod 233 passes through the slide groove 243, rotating it 90° can ensure that the limiting post can engage with the guide part 242 and prevent the end of the fixing rod 233 from coming out of the slide groove 243.

[0102] like Figure 8 As shown, the guide rail 24 includes two fixing parts 241, which are located at opposite ends of the guide part 242. Therefore, the cross section of the guide rail 24 along the extension direction perpendicular to the slide groove 243 is "Z" shaped. The two fixing parts 241 can support the guide part 242 at the same time, ensuring the stability of the distance between the guide part 242 and the inner wall of the housing 21, thereby ensuring the smooth sliding of the fixing rod 233.

[0103] It is worth noting that since the elastic filter 231 can adjust the size of the ventilation gap according to the type of cooking, it has a good filtering effect on heavy oil fumes. This also makes the elastic filter 231 more prone to oil accumulation, causing the spring 2311 to stick and affecting the extension and contraction of the spring 2311. Therefore, the oil fume filter module 2 needs to consider the convenience of disassembly and assembly in order to clean the internal structure of the housing 21.

[0104] like Figure 2 and Figure 3 As shown, to achieve the above objectives, the housing 21 includes an upper cover 211, a middle frame 212, and a bottom plate 213. The upper cover 211 has an air outlet 2111, and the bottom plate 213 has an opening 2131. Both the upper cover 211 and the bottom plate 213 are removable, facilitating the cleaning of the internal elastic filter 231.

[0105] In this embodiment, the housing 21 further includes a first enclosure 2112 and a second enclosure 2132. The first enclosure 2112 is spaced above the elastic filter 231 and surrounds the air outlet 2111. The second enclosure 2132 is spaced below the elastic filter 231 and surrounds the opening 2131. Both the first enclosure 2112 and the second enclosure 2132 are close to the elastic filter 231, which minimizes the gap between them without affecting the expansion and contraction of the elastic filter 231. This allows most of the fumes to be discharged through the air outlet 2111, preventing condensation of fumes inside the housing 21 and contamination of its inner wall.

[0106] Furthermore, the first enclosure 2112 is fixedly connected to the upper cover 211 or the middle frame 212, and the second enclosure 2132 is fixedly connected to the middle frame 212 or the bottom plate 213. In this embodiment, the first enclosure 2112 is fixedly connected to the upper cover 211, and the second enclosure 2132 is fixedly connected to the bottom plate 213, so as to facilitate the assembly and disassembly of the filter assembly 23.

[0107] In this embodiment, the middle frame 212 is provided with an inwardly protruding oil-blocking rib 2121, which extends along the extension and retraction direction of the elastic filter 231 and is spaced apart from the elastic filter 231. The oil-blocking rib 2121 can reduce the gap between the inner wall of the housing 21 and the elastic filter 231, ensuring that the oil fumes are filtered through the elastic filter 231.

[0108] Example 2

[0109] like Figure 9 As shown, in this embodiment, the range hood 100 further includes a first oil fume sensor 41 and a second oil fume sensor 42. The first oil fume sensor 41 is located upstream of the first air inlet and is used to detect the oil fume concentration of the gas flowing to the first air inlet. The second oil fume sensor 42 is located upstream of the second air inlet and is used to detect the oil fume concentration of the gas flowing to the second air inlet.

[0110] This embodiment also provides a control method for a range hood, used to control the aforementioned range hood 100, such as... Figure 10 As shown, the control method includes:

[0111] Start the fan;

[0112] The drive component 232 stretches the corresponding elastic filter screen 231 to its initial state;

[0113] The oil fume concentration C1 upstream of the first air inlet and the oil fume concentration C2 upstream of the second air inlet are detected respectively, and the concentration ranges of C1 and C2 are determined.

[0114] The drive unit 232 stretches or retracts the corresponding elastic filter 231 according to C1 and C2 to adjust the ventilation gap of the elastic filter 231.

[0115] After the range hood 100 is started, the drive component 232 stretches the elastic filter 231, causing the elastic filter 231 to be stretched to maintain a certain ventilation gap; this is the initial state of the elastic filter 231. Then, by detecting the oil fume concentration C1 upstream of the first air inlet and the oil fume concentration C2 upstream of the second air inlet, and adjusting the ventilation gap of the corresponding elastic filter 231 according to C1 and C2, the filtration capacity of the filter assembly 23 is adjusted, thereby improving the filtration effect.

[0116] Specifically, the control method includes a first preset concentration Ca; if C1 < Ca, the drive unit 232 located at the first air inlet stretches the corresponding elastic filter 231 to increase the ventilation gap; and / or, if C2 < Ca, the drive unit 232 located at the second air inlet stretches the corresponding elastic filter 231 to increase the ventilation gap.

[0117] The value of Ca was determined through multiple experiments. When the oil fume concentration is less than Ca, it indicates that there is less oil fume during cooking. In this case, the ventilation gap can be increased to improve ventilation efficiency, which is equivalent to reducing the resistance of filtration and facilitating the passage of oil fumes. Generally, when performing cooking operations with less oil fume, such as steaming or boiling, it is necessary to increase the ventilation gap.

[0118] Furthermore, the control method includes a second preset concentration Cb, where if Ca≤C1<Cb, the ventilation gap of the elastic filter 231 located at the first air inlet remains unchanged, and / or, if Ca≤C2<Cb, the ventilation gap of the elastic filter 231 located at the second air inlet remains unchanged.

[0119] Cb was determined through multiple experiments. When the oil fume concentration is greater than or equal to Ca and less than Cb, it indicates that a certain amount of oil fume was generated during cooking. At this time, the ventilation gap of the elastic filter 231 can be kept unchanged. The size of the ventilation gap is moderate, allowing gas to pass through while allowing oil fumes to adhere to the spring 2311, thus achieving the effect of filtering oil fumes. Under normal circumstances, when performing cooking operations with moderate oil fume, such as stir-frying, the ventilation gap can be kept unchanged.

[0120] If C1≥Cb, the drive unit 232 located at the first air inlet causes the corresponding elastic filter 231 to retract to reduce the ventilation gap, and / or, if C2≥Cb, the drive unit 232 located at the second air inlet causes the corresponding elastic filter 231 to retract to reduce the ventilation gap.

[0121] When the oil fume concentration is greater than or equal to Cb, it indicates a large amount of oil fume during cooking. In this case, the elastic filter 231 needs to retract to reduce the ventilation gap, thereby improving the filtration effect and allowing as much oil fume as possible to condense on the spring 2311, preventing oil fume from polluting the downstream flue and fan through the filter assembly 23. Understandably, when performing cooking operations with a large amount of oil fume, such as stir-frying, it is necessary to reduce the ventilation gap and improve the filtration effect.

[0122] It is worth noting that the filter components 23 at the first air inlet and the second air inlet can both independently adjust their filtration capacity. Specifically, both filter components 23 can adjust the stretching degree of the elastic filter screen 231 according to the cooking type of the corresponding stove, thereby obtaining the ability to filter oil fumes that matches the cooking type of the stove.

[0123] Furthermore, after adjusting the ventilation gap of the elastic filter 231, the oil fume concentration C1 upstream of the first air inlet and the oil fume concentration C2 upstream of the second air inlet are cyclically detected, and it is determined whether they are equal to the concentration values ​​detected last time. If they are not equal, the corresponding elastic filter 231 is stretched or retracted according to C1 and C2 to adjust the ventilation gap of the elastic filter 231.

[0124] The oil fume concentration C1 upstream of the first air inlet and the oil fume concentration C2 upstream of the second air inlet are cyclically detected. The filtration capacity of the corresponding elastic filter 231 can be dynamically adjusted according to the actual situation, so that the filtration effect matches the amount of oil fume.

[0125] Understandably, after adjusting the ventilation gap of the elastic filter 231 according to the oil fume concentration, although the filtration capacity of the elastic filter 231 is matched with the oil fume concentration, the resistance of the gas flowing through the elastic filter 231 is also changed accordingly. In order to ensure the oil fume adsorption effect of the range hood 100, the fan speed needs to be adjusted accordingly.

[0126] like Figure 9 As shown, in this embodiment, the range hood 100 further includes a first wind speed sensor 51 and a second wind speed sensor 52. The first wind speed sensor 51 is located downstream of the first air inlet and is used to detect the flow rate of the gas flowing out of the first air inlet. The second wind speed sensor 52 is located downstream of the second air inlet and is used to detect the flow rate of the gas flowing out of the second air inlet.

[0127] In this embodiment, if the oil fume concentration C1 upstream of the first air inlet and the oil fume concentration C2 upstream of the second air inlet are equal to the concentration values ​​detected in the previous test, then the gas flow velocity V1 downstream of the first air inlet and the gas flow velocity V2 downstream of the second air inlet are detected, and the average flow velocity V3 is calculated, V3 = (V1 + V2) / 2, and the range in which V3 is located is determined. The fan speed is adjusted according to V3.

[0128] After adjusting the ventilation gap of the two elastic filters 231 according to the oil fume concentration at the first and second air inlets, the range hood 100 needs to adjust the fan speed according to the downstream flow velocity of the first and second air inlets. In this embodiment, the fan speed is set to three levels: stir-fry mode, strong mode, and weak mode. The speed of the stir-fry mode is higher than that of the strong mode, and the speed of the strong mode is higher than that of the weak mode.

[0129] However, users don't necessarily use both stoves simultaneously while cooking, and even if they do, the cooking types on the two stoves can differ. This means the gas flow velocities downstream of the first and second air inlets may not be the same. Since there's usually only one fan, its rotation creates negative pressure at both the first and second air inlets. Therefore, to accurately adjust the fan speed to the appropriate range, it's necessary to adjust the fan speed based on the average flow velocity V3 downstream of both the first and second air inlets.

[0130] Specifically, the control method includes a first preset flow velocity Vm. If V3 < Vm, the fan speed is adjusted to the high-speed setting. Vm is determined through multiple experiments. A lower average flow velocity V3 indicates a smaller ventilation gap in the elastic filter 231, resulting in greater resistance to gas flow. A smaller ventilation gap indicates a higher concentration of oil fumes; therefore, the fan speed needs to be adjusted to the higher-speed setting (high-speed stir-fry) to improve fume extraction and handle cooking operations with high oil fume levels, such as stir-frying, thus preventing kitchen pollution.

[0131] Furthermore, the control method includes a second preset flow rate Vn. If Vm ≤ V3 < Vn, the fan speed is adjusted to the high setting. Vn is determined through multiple experiments. At this setting, the average flow rate V3 is moderate, indicating that the cooking operation with moderate oil fume production, such as stir-frying, is being performed. Therefore, adjusting the fan speed to the high setting is sufficient to ensure both oil fume extraction and ventilation effects.

[0132] If V3 ≥ Vn, then adjust the fan speed to a lower setting. When the average flow velocity is high, it indicates that the ventilation gap of the elastic filter 231 is large. In this case, when performing cooking operations with low oil fume content, such as steaming or boiling, the ventilation effect is good. Therefore, it is advisable to adjust the fan speed to a lower setting. This saves energy and reduces noise, and also appropriately reduces the gas flow velocity to prevent oil fumes from flowing through the elastic filter 231 too quickly, which would reduce the filtration effect.

[0133] In this embodiment, after adjusting the fan speed, the gas flow velocity V1 downstream of the first air inlet and the gas flow velocity V2 downstream of the second air inlet are cyclically detected, V3 is recalculated, and it is determined whether it is equal to the average gas flow velocity detected last time. If they are not equal, the fan speed is adjusted according to V3. If they are equal, the fan speed is kept constant.

[0134] By cyclically detecting the gas flow velocity V1 downstream of the first air inlet and the gas flow velocity V2 downstream of the second air inlet, the fan speed can be dynamically adjusted according to the actual situation, so that the range hood 100's smoke extraction capacity is neither too weak nor too strong, which can both improve the smoke extraction capacity and save energy.

[0135] Example 3

[0136] Figure 11 This is a schematic diagram of the structure of a device according to Embodiment 3 of the present invention. Figure 11 A block diagram of an exemplary device 120 suitable for implementing embodiments of the present invention is shown. Figure 11 The device 120 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of the present invention.

[0137] like Figure 11 As shown, device 120 is presented in the form of a general-purpose computing device. Components of device 120 may include, but are not limited to: one or more processors or processing units 160, system memory 280, and bus 180 connecting different system components (including system memory 280 and processing unit 160).

[0138] Bus 180 represents one or more of several bus architectures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the various bus architectures. Examples of these architectures include, but are not limited to, the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnect (PCI) bus.

[0139] Device 120 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by device 120, including volatile and non-volatile media, removable and non-removable media.

[0140] System memory 280 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 300 and / or cache memory 320. Device 120 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 340 may be used to read and write non-removable, non-volatile magnetic media (…). Figure 11 Not shown; usually referred to as a "hard drive"). Although Figure 11 Not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk") and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 180 via one or more data media interfaces. Memory 280 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of the present invention.

[0141] A program / utility 400 having a set (at least one) of program modules 420 may be stored, for example, in system memory 280. Such program modules 420 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. Program modules 420 typically perform the functions and / or methods described in the embodiments of the present invention.

[0142] Device 120 can also communicate with one or more external devices 140 (e.g., keyboard, pointing device, display 240, etc.), and with one or more devices that enable a user to interact with device 120, and / or with any device that enables device 120 to communicate with one or more other computing devices (e.g., network card, modem, etc.). This communication can be performed via I / O interface 220. Furthermore, in this embodiment, device 120 and display 240 are not separate entities, but are embedded in a mirror, so that when the display surface of display 240 is not displayed, the display surface of display 240 and the mirror surface visually blend together. Additionally, device 120 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 200. As shown, network adapter 200 communicates with other modules of device 120 via bus 180. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with device 120, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0143] The processing unit 160 executes various functional applications and data processing by running programs stored in the system memory 280, such as implementing a control method provided in Embodiment 2 of the present invention.

[0144] Example 4

[0145] Embodiment 4 of the present invention provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a control method as provided in all embodiments 2 of the present application.

[0146] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0147] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of sending, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0148] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0149] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages—such as Java, Smalltalk, and C++—as well as conventional procedural programming languages—such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0150] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. An oil fume filtration module, characterized in that, include: The housing (21) has an air outlet (2111) on its top surface and an opening (2131) on its bottom surface that is directly opposite the air outlet (2111). A fixing member (22) is fixedly disposed inside the housing (21) to divide the opening (2131) into a first air inlet and a second air inlet; Two filter components (23) have ventilation gaps. One filter component (23) covers the first air inlet, and the other filter component (23) covers the second air inlet. Both filter components (23) can change the size of the ventilation gaps. The filter assembly (23) includes an elastic filter (231) and a drive member (232). The elastic filter (231) has the ventilation gap. The elastic filter (231) includes a plurality of springs (2311) arranged side by side. The springs (2311) are partially inserted into the gaps between adjacent springs (2311). One end of the elastic filter (231) of both filter assemblies (23) is fixedly connected to the fixing member (22). The drive member (232) is fixedly connected to the other end of the corresponding elastic filter (231). The drive member (232) can extend and retract the elastic filter (231) to change the size of the ventilation gap.

2. The oil fume filtration module according to claim 1, characterized in that, The filter assembly (23) also includes a fixing rod (233), and one end of one of the plurality of springs (2311) is sleeved on the fixing rod (233).

3. The oil fume filtration module according to claim 2, characterized in that, The fixing rod (233) has multiple fixing grooves (2331) spaced apart along the axial direction, and one end of the spring (2311) is sleeved in the corresponding fixing groove (2331).

4. The oil fume filtration module according to claim 2, characterized in that, The filter assembly (23) also includes a hook (234), both ends of which are sleeved on the fixed rod (233). The driving component (232) drives the fixed rod (233) to move through the hook (234).

5. The oil fume filtration module according to claim 2, characterized in that, The filter assembly (23) further includes a reel (235) and a rope (236). The reel (235) is rotatably disposed within the housing (21). One end of the rope (236) is wound around the reel (235), and the other end of the rope (236) is connected to the fixed rod (233). The drive member (232) is configured to drive the reel (235) to rotate; or The filter assembly (23) further includes a hook (234), a reel (235), and a rope (236). Both ends of the hook (234) are fitted onto the fixing rod (233). The reel (235) is rotatably disposed within the housing (21). One end of the rope (236) is wound around the reel (235), and the other end of the rope (236) is connected to the hook (234). The drive unit (232) is configured to drive the reel (235) to rotate.

6. The oil fume filtration module according to claim 2, characterized in that, The housing (21) has two opposing inner walls provided with guide rails (24), and the guide rails (24) have grooves (243). The end of the fixing rod (233) is slidably disposed in the groove (243) of the corresponding guide rail (24).

7. The oil fume filtration module according to claim 6, characterized in that, The guide rail (24) includes a guide part (242) and a fixing part (241). The guide part (242) is connected to the fixing part (241). The fixing part (241) is fixedly disposed on the inner wall of the housing (21). The guide part (242) is spaced apart from the inner wall of the housing (21). The slide groove (243) is formed on the guide part (242).

8. The oil fume filtration module according to claim 1, characterized in that, The fastener (22) includes two fixing plates (221), and the fixing plates (221) are provided with a plurality of fixing holes (222) spaced apart along the length direction. Each elastic filter (231) is fixedly connected to the corresponding fixing plate (221), and a plurality of springs (2311) of each elastic filter (231) are hooked into the corresponding fixing holes (222).

9. The oil fume filtration module according to claim 8, characterized in that, The two fixing plates (221) are arranged at an angle to form a V-shaped groove, and an oil guide hole (223) is provided at the bottom of the V-shaped groove.

10. The oil fume filter module according to any one of claims 1 to 9, characterized in that, The housing (21) includes an upper cover (211), a middle frame (212), and a bottom plate (213). The upper cover (211) has the air outlet (2111), and the bottom plate (213) has the opening (2131).

11. The oil fume filtration module according to claim 10, characterized in that, The middle frame (212) is provided with an inwardly protruding oil-blocking rib (2121), which extends along the stretching direction of the elastic filter (231) and is spaced apart from the elastic filter (231).

12. The oil fume filtration module according to claim 10, characterized in that, The base plate (213) is inclined downward in the direction from front to back, and an oil leakage hole (2133) is provided at the rear end of the base plate (213).

13. A range hood, characterized in that, The device includes a housing (1), a fan, and an oil fume filtration module according to any one of claims 1 to 12, wherein the housing (1) has an air inlet (11), the fan is configured to generate negative pressure at the air inlet (11), and the oil fume filtration module is located upstream of the fan in the oil fume flow path.

14. A control method for a range hood, characterized in that, The control method for controlling the range hood of claim 13 includes: Start the fan; The drive unit (232) stretches the corresponding elastic filter (231) to its initial state; The oil fume concentration C1 upstream of the first air inlet and the oil fume concentration C2 upstream of the second air inlet are detected respectively, and the concentration ranges of C1 and C2 are determined. The drive unit (232) stretches or retracts the corresponding elastic filter (231) according to C1 and C2 to adjust the ventilation gap of the elastic filter (231).

15. The control method for a range hood according to claim 14, characterized in that, The control method includes a first preset concentration Ca, if C1 < Ca, the drive member (232) located at the first air inlet stretches the corresponding elastic filter (231) to increase the ventilation gap, and / or, if C2 < Ca, the drive member (232) located at the second air inlet stretches the corresponding elastic filter (231) to increase the ventilation gap.

16. The control method for a range hood according to claim 15, characterized in that, The control method includes a second preset concentration Cb, where if Ca≤C1<Cb, the ventilation gap of the elastic filter (231) located at the first air inlet remains unchanged, and / or, if Ca≤C2<Cb, the ventilation gap of the elastic filter (231) located at the second air inlet remains unchanged.

17. The control method for a range hood according to claim 16, characterized in that, If C1≥Cb, the drive member (232) located at the first air inlet causes the corresponding elastic filter (231) to retract to reduce the ventilation gap, and / or, if C2≥Cb, the drive member (232) located at the second air inlet causes the corresponding elastic filter (231) to retract to reduce the ventilation gap.

18. The control method for a range hood according to any one of claims 14 to 17, characterized in that, Also includes: After adjusting the ventilation gap of the elastic filter (231), the oil fume concentration C1 upstream of the first air inlet and the oil fume concentration C2 upstream of the second air inlet are cyclically detected, and it is determined whether they are equal to the concentration values ​​detected last time. If they are not equal, the corresponding elastic filter (231) is stretched or retracted according to C1 and C2 to adjust the ventilation gap of the elastic filter (231).

19. The control method for a range hood according to claim 18, characterized in that, If they are equal, the gas velocity V1 downstream of the first air inlet and the gas velocity V2 downstream of the second air inlet are detected, and the average velocity V3 is calculated, V3 = (V1 + V2) / 2. The range of V3 is determined, and the speed of the fan is adjusted according to V3.

20. The control method for a range hood according to claim 19, characterized in that, The control method includes a first preset flow rate Vm. If V3 < Vm, the fan speed is adjusted to the stir-fry setting.

21. The control method for a range hood according to claim 20, characterized in that, The control method includes a second preset flow rate Vn. If Vm≤V3<Vn, the fan speed is adjusted to the high setting.

22. The control method for a range hood according to claim 21, characterized in that, If V3 ≥ Vn, then adjust the fan speed to a lower setting.

23. The control method for a range hood according to any one of claims 19 to 22, characterized in that, Also includes: After adjusting the speed of the fan, the gas flow velocity V1 downstream of the first air inlet and the gas flow velocity V2 downstream of the second air inlet are cyclically detected. V3 is recalculated and it is determined whether it is equal to the average gas flow velocity detected last time. If they are not equal, the speed of the fan is readjusted according to V3.

24. The control method for a range hood according to claim 23, characterized in that, If the recalculated V3 is equal to the average gas flow rate detected in the previous test, then the fan speed remains unchanged.

25. A device, characterized in that, The device includes: One or more processors; Storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the control method as described in any one of claims 14 to 24.

26. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the control method as described in any one of claims 14 to 24.

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