An oil fume filtering net, an extractor hood and a control method

Abstract

The embodiment of the present application provides an oil fume filtering net, a range hood and a control method, and relates to the technical field of home appliances. The oil fume filtering net comprises a driving module, horizontal steel wires and vertical steel wires, the horizontal steel wires and the vertical steel wires cross to form ventilation holes; the driving module comprises a wire guide wheel and a driven spline shaft; a plurality of wire guide wheels are arranged on the driven spline shaft, the wire guide wheels guide the horizontal steel wires and / or the vertical steel wires to move, and the wire guide wheels slide along the driven spline shaft. The oil fume filtering net provided by the embodiment of the present application can realize dynamic control of the spacing between adjacent vertical steel wires of the oil fume filtering net, reduce the attachment of oil fume on the filtering net, and improve the filtering efficiency of the oil fume filtering net.

Description

Technical Field

[0001] This invention relates to the field of home appliance technology, and in particular to an oil fume filter, a range hood, and a control method. Background Technology

[0002] Currently, a large amount of oily fumes are often generated during the food processing in restaurants and home kitchens. These fumes contain a lot of grease and harmful chemicals. If they are released directly into the atmosphere without treatment, they will cause great harm to the environment and human health.

[0003] Existing range hoods typically use static filters for oil fume separation, which cannot dynamically adjust the filter's filtration based on the range hood's operating settings. Furthermore, static filters are prone to grease buildup, affecting their lifespan. Summary of the Invention

[0004] This invention provides an oil fume filter, a range hood, and a control method to dynamically control the ventilation hole perforation rate of the oil fume filter, reduce oil fume adhesion to the filter, and improve the filtration efficiency of the oil fume filter.

[0005] In a first aspect, the present invention provides an oil fume filter screen, including a drive module, horizontal steel wires and vertical steel wires, wherein the horizontal steel wires and vertical steel wires intersect to form ventilation holes;

[0006] The drive module includes guide rollers and driven spline shafts; multiple guide rollers are mounted on the driven spline shaft, and the guide rollers guide the movement of transverse and / or longitudinal steel wires, and slide along the driven spline shaft.

[0007] Optionally, the drive module also includes cams and a drive spline shaft, with multiple cams mounted on the drive spline shaft;

[0008] A cam is sandwiched between two adjacent guide wheels on the same driving spline shaft. When the cam slides along the driving spline shaft, it drives the guide wheel to slide along the driven spline shaft.

[0009] Optionally, the drive module also includes a drive gear and a driven gear, the drive gear being connected to a drive spline shaft, the driven gear being connected to a driven spline shaft, and the drive gear meshing with the driven gear;

[0010] Optionally, the cam has a gradually tapered ramp.

[0011] Optionally, the drive module also includes an elastic element disposed on the drive spline shaft and between the drive gear and the cam.

[0012] Optionally, the drive module further includes a first bearing housing, a first bearing, a second bearing housing, and a second bearing;

[0013] The end of the drive spline shaft is mounted on the first bearing, and the first bearing is mounted on the first bearing housing;

[0014] The driven spline shaft is mounted on the end of a second bearing, which is mounted on a second bearing housing.

[0015] Secondly, the present invention provides a range hood, including the above-mentioned oil fume filter and smoke collection hood, wherein the oil fume filter is disposed above the smoke collection hood.

[0016] Thirdly, the present invention provides a control method for a range hood, comprising:

[0017] Get the range hood setting;

[0018] The first distance is determined by adjusting the spacing between adjacent longitudinal steel wires according to the range hood setting; the higher the range hood setting, the smaller the first distance.

[0019] Optionally, the drive module also includes a drive gear and a driven gear, the drive gear being connected to a drive spline shaft, the driven gear being connected to a driven spline shaft, and the drive gear meshing with the driven gear; the cam has a gradually changing slope;

[0020] Adjust the spacing between adjacent longitudinal steel wires according to the range hood setting to the first distance, including:

[0021] Based on the range hood's setting, the rotation angle of the cam is adjusted to the first angle, and the spacing between adjacent longitudinal steel wires is adjusted to the first distance; where, the smaller the first angle, the smaller the first distance.

[0022] Optionally, after adjusting the rotation angle of the cam to a first angle and the spacing between adjacent longitudinal steel wires to a first distance according to the range hood setting, the method further includes:

[0023] Obtain the initial oil fume filtration efficiency;

[0024] Determine whether the initial fume filtration efficiency is less than the preset efficiency;

[0025] If the initial fume filtration efficiency is less than the preset efficiency, then the first compensation angle is obtained, and the second angle is obtained based on the first compensation angle and the first angle.

[0026] Optionally, the first angle is a, the first compensation angle is a1, the second angle is b, the initial fume filtration efficiency is η, and the preset efficiency is η1, satisfying:

[0027] a1 = a × (η1 - η);

[0028] b = a - a1.

[0029] Optionally, after obtaining the first compensation angle and obtaining the second angle based on the first compensation angle and the first angle, the method further includes:

[0030] To improve the efficiency of fume filtration;

[0031] Determine whether the fume filtration efficiency is lower than the preset efficiency;

[0032] If the fume filtration efficiency is less than the preset efficiency again, a second compensation angle is obtained, and a third angle is obtained based on the second compensation angle and the second angle.

[0033] Optionally, the second angle is b, the second compensation angle is b1, the third angle is c, the fume filtration efficiency is η2, and the preset efficiency is η1, satisfying:

[0034] b1 = b × (η1 - η2);

[0035] c = b - b1.

[0036] Optionally, after determining whether the fume filtration efficiency is less than the preset efficiency, the method further includes:

[0037] If the fume filtration efficiency is greater than or equal to the preset efficiency again, then obtain the initial air volume attenuation value.

[0038] Determine whether the initial airflow attenuation value is greater than the preset attenuation value;

[0039] If the initial airflow attenuation value is less than or equal to the preset attenuation value, then increase the fan speed.

[0040] The fume filter provided in this embodiment of the invention has cross-shaped and longitudinal steel wires forming ventilation holes. Multiple guide wheels on a driven spline shaft guide the movement of the cross-shaped and / or longitudinal steel wires. After the range hood is turned on, the guide wheels drive the cross-shaped and / or longitudinal steel wires to move, changing the spacing between adjacent cross-shaped and / or longitudinal steel wires. This change in the area of ​​the ventilation holes formed by the cross-shaped and longitudinal steel wires alters the fume filtration effect. Taking a fixed spacing between adjacent cross-shaped steel wires and a changed spacing between adjacent longitudinal steel wires as an example, when the range hood speed is low, a larger spacing between adjacent longitudinal steel wires is sufficient to filter and collect fumes; when the range hood speed is high, a higher fume filtration efficiency is required, therefore a smaller spacing between adjacent longitudinal steel wires is needed to improve the fume filtration effect. This achieves dynamic control of the spacing between adjacent longitudinal steel wires of the fume filter based on the range hood speed, reducing the amount of fumes adhering to the filter and improving the filtration efficiency of the fume filter. Attached Figure Description

[0041] Figure 1 A three-dimensional structural diagram of an oil fume filter provided in an embodiment of the present invention;

[0042] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0043] Figure 3 This is a three-dimensional structural diagram of a cam provided in an embodiment of the present invention;

[0044] Figure 4 This is a front view schematic diagram of a cam structure provided in an embodiment of the present invention;

[0045] Figure 5 A three-dimensional structural schematic diagram of a guide wheel provided in an embodiment of the present invention;

[0046] Figure 6 This is a side view of a guide wheel provided in an embodiment of the present invention;

[0047] Figure 7 A three-dimensional structural schematic diagram of an active spline shaft provided in an embodiment of the present invention;

[0048] Figure 8 A three-dimensional structural schematic diagram of a driven spline shaft provided in an embodiment of the present invention;

[0049] Figure 9 This is a three-dimensional structural diagram of a range hood provided in an embodiment of the present invention;

[0050] Figure 10 This is a front view structural diagram of a range hood provided in an embodiment of the present invention;

[0051] Figure 11 This is a side view of a range hood provided in an embodiment of the present invention;

[0052] Figure 12 A flowchart illustrating a first method for controlling a range hood according to an embodiment of the present invention;

[0053] Figure 13 A flowchart illustrating a second control method for a range hood provided in an embodiment of the present invention;

[0054] Figure 14 A flowchart of a third control method for a range hood provided in an embodiment of the present invention.

[0055] In the diagram: 1. Fume filter; 11. Drive module; 111. Cam; 1111. Inclined plane; 112. Guide wheel; 113. Drive spline shaft; 114. Driven spline shaft; 115. Drive gear; 116. Driven gear; 117. Elastic element; 1181. First bearing housing; 1182. First bearing; 1191. Second bearing housing; 1192. Second bearing; 1110. Motor; 12. Horizontal steel wire; 13. Vertical steel wire; 14. Ventilation hole; 2. Fume hood; 3. Fan system. Detailed Implementation

[0056] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0057] refer to Figure 1-8 The fume filter includes four sets of drive modules 11, horizontal steel wires 12, and vertical steel wires 13. The four sets of drive modules 11 form a two-row, two-column array. In other embodiments, the fume filter includes other numbers of drive modules 11, which is not limited in this embodiment. For example, the fume filter includes three or five sets of drive modules 11. For ease of understanding, this embodiment uses four sets of drive modules 11 as an example. The horizontal steel wires 12 and vertical steel wires 13 intersect to form ventilation holes 14. The four sets of drive modules 11 can have the same structure, with two sets of drive modules 11 arranged front and rear on the upper filter and two sets of drive modules 11 arranged front and rear on the lower filter. Both the upper and lower filter are formed by the intersection of horizontal and vertical steel wires 12 and 13.

[0058] refer to Figure 1-8 The drive module 11 includes guide rollers 112 and driven spline shafts 114. Multiple guide rollers 112 are mounted on the driven spline shafts 114. The driven spline shafts 114 extend along the length of the fume filter. The guide rollers 112 guide the movement of longitudinal steel wires 13. In other embodiments, the driven spline shafts 114 may extend along the width of the fume filter, guiding the movement of transverse steel wires 12 on the guide rollers 112; alternatively, both a driven spline shaft 114 extending along the length and a driven spline shaft 114 extending along the width of the fume filter may be provided, guiding the movement of both transverse and longitudinal steel wires 12 on the guide rollers 112. The longitudinal steel wires 13 are mounted on the guide rollers 112, and their positions can change as the guide rollers 112 slide on the driven spline shafts 114, thereby changing the spacing between adjacent longitudinal steel wires 13.

[0059] For example, taking the fixed spacing between adjacent horizontal steel wires 12 and the changed spacing between adjacent vertical steel wires 13 as an example. The horizontal steel wires 12 are fixed to the horizontal support ( Figure 1(Not shown in the image) The longitudinal steel wires 13 move according to the sliding of the guide wheel 112. When the range hood is set to the low setting, the corresponding stove has a lower heat setting, resulting in a lower concentration of oil fumes. A higher oil fume filtration efficiency is not required to filter and collect all the oil fumes, and the spacing between adjacent longitudinal steel wires 13 is relatively large. When the range hood is set to the high setting, the corresponding stove has a higher heat setting, resulting in a higher concentration of oil fumes, and the oil fume filtration efficiency is moderate. When the range hood is set to the high-heat setting, the corresponding stove has a high heat setting, resulting in a high concentration of oil fumes. A higher oil fume filtration efficiency is required, and a smaller spacing between adjacent longitudinal steel wires 13 is needed to ensure that all harmful components in the indoor oil fumes are filtered and collected.

[0060] The fume filter provided in this embodiment of the invention has cross-shaped steel wires 12 and longitudinal steel wires 13 forming ventilation holes 14. Multiple guide wheels 112, mounted on a driven spline shaft 114, guide the movement of the cross-shaped steel wires 12 and / or the longitudinal steel wires 13. After the range hood is turned on, the guide wheels 112 drive the longitudinal steel wires 13 to move, changing the spacing between adjacent cross-shaped steel wires 12 and / or the spacing between adjacent longitudinal steel wires 13. The ventilation hole area 14 formed by the cross-shaped and longitudinal steel wires 12 changes, thereby altering the fume filtration effect. Taking a fixed spacing between adjacent cross-shaped steel wires 12 and a changed spacing between adjacent longitudinal steel wires 13 as an example, when the range hood speed is low, a larger spacing between adjacent longitudinal steel wires 13 is sufficient to filter and collect fumes; when the range hood speed is high, a higher fume filtration efficiency is required, therefore a smaller spacing between adjacent longitudinal steel wires 13 is needed to improve the fume filtration effect. The spacing between adjacent longitudinal steel wires 13 of the fume filter can be dynamically controlled according to the range hood speed, thereby reducing the amount of oil fumes adhering to the filter and improving the filtration efficiency of the fume filter.

[0061] Optionally, refer to Figures 1-8 The drive module 11 also includes cams 111 and a drive spline shaft 113, with multiple cams 111 mounted on the drive spline shaft 113. A cam 111 is positioned between two adjacent guide wheels 112 mounted on the same driven spline shaft 114. When the cam 111 slides along the drive spline shaft 113, it drives the guide wheel 112 to slide along the driven spline shaft 114. Taking a fixed spacing between adjacent horizontal wires 12 and a changed spacing between adjacent vertical wires 13 as an example, the vertical wires 13 are mounted on the guide wheels 112. The vertical wires 13 can change position as the guide wheels 112 slide on the driven spline shaft 114, thereby changing the spacing between two adjacent vertical wires 13.

[0062] In other embodiments, the cam 111 may also slide according to the oil fume concentration determined by the oil fume concentration sensor located near the oil fume filter, and the present invention does not limit this.

[0063] For example, the size and number of the cam 111 and the guide wheel 112 can be set according to actual needs, and the embodiments of the present invention do not limit this.

[0064] Optionally, refer to Figures 1-8 The drive module 11 also includes a drive gear 115 and a driven gear 116. The drive gear 115 is connected to the drive spline shaft 113, and the driven gear 116 is connected to the driven spline shaft 114. The drive gear 115 and the driven gear 116 mesh. The cam 111 has a gradually changing inclined surface 1111.

[0065] For example, the driving gear 115 meshes with the driven gear 116. When the driving spline shaft 113 rotates, the driving gear 115 mounted on the driving spline shaft 113 rotates, driving the driven gear 116 to rotate. The driven gear 116 is mounted on the driven spline shaft 114, thereby driving the driven spline shaft 114 to rotate. The cam 111 is mounted on the driving spline shaft 113, and when the driving spline shaft 113 rotates, it drives the cam 111 to rotate. The cam 111 has a gradually changing inclined surface 1111, and the thickness of the cam 111 corresponding to the inclined surface 1111 is not equal at various angles. When the cam 111 rotates, the cam 111 has an axial force on the driving spline shaft 113, causing the cam 111 to slide along the extension direction of the driving spline shaft 113. Understandably, a cam 111 is sandwiched between two adjacent guide pulleys 112 mounted on the same driven spline shaft 114. When the cam 111 rotates, it slides along the driving spline shaft 113, causing the guide pulleys 112 to slide along the driven spline shaft 114. If the thickness of the cam 111 increases, the distance between the two adjacent guide pulleys 112 separated by the cam 111 increases, and the distance between the adjacent longitudinal wires 13 increases; if the thickness of the cam 111 decreases, the distance between the two adjacent guide pulleys 112 separated by the cam 111 decreases, and the distance between the adjacent longitudinal wires 13 decreases.

[0066] For example, the drive module 11 may further include a motor 1110, which drives the drive spline shaft 113 to rotate. A drive gear 115 is connected to the drive spline shaft 113, thereby causing the drive spline shaft 113 to drive the drive gear 115 to rotate. The drive gear 115 meshes with a driven gear 116, causing the driven gear 116 to rotate. The driven gear 116 is mounted on a driven spline shaft 114, thereby causing the driven gear 114 to rotate. The rotation of the drive spline shaft 113 causes the cam 111 mounted on it to rotate. The rotation of the cam 111 changes the distance between two adjacent guide wheels 112. Therefore, in this embodiment of the invention, by setting a motor 1110, the distance between two adjacent guide wheels 112 is changed by the motor 1110, thereby changing the distance between adjacent longitudinal steel wires 13 and / or the distance between adjacent transverse steel wires 12, thus realizing automatic control of the distance between adjacent longitudinal steel wires 13 and / or the distance between adjacent transverse steel wires 12.

[0067] Optionally, refer to Figure 1 and Figure 2 The drive module 11 also includes an elastic element 117, which is disposed on the drive spline shaft 113 and between the drive gear 115 and the cam 111.

[0068] For example, an elastic element 117 is disposed between the drive gear 115 and the cam 111. When the cam 111 slides toward the drive gear 115, the cam 111 compresses the elastic element 117, generating pressure. When the cam 111 slides away from the drive gear 115, the elastic element 117 extends, providing the cam 111 with a force to slide on the drive spline shaft 113.

[0069] For example, the elastic element 117 may specifically be an element such as a spring.

[0070] Optionally, refer to Figure 1The drive module 11 also includes a first bearing housing 1181, a first bearing 1182, a second bearing housing 1191, and a second bearing 1192. The end of the drive spline shaft 113 is mounted on the first bearing 1182, which is mounted on the first bearing housing 1181. The end of the driven spline shaft 114 is mounted on the second bearing 1192, which is mounted on the second bearing housing 1191. The first bearing 1182 supports the drive spline shaft 113 and reduces its rotational friction, allowing the cam 111 to rotate more smoothly following the drive spline shaft 113. The second bearing 1192 supports the driven spline shaft 114 and reduces its rotational friction, allowing the guide wheel 112 to rotate more smoothly following the driven spline shaft 114, driving the longitudinal steel wires 13 to move and adjusting the spacing between adjacent longitudinal steel wires 13 according to the range hood's gear setting.

[0071] Based on the same technical concept, embodiments of the present invention also provide a range hood. (See reference) Figures 9-11 The range hood includes an oil fume filter 1 and a smoke collection hood 2 as provided in any one of the embodiments of the present invention, with the oil fume filter 1 disposed above the smoke collection hood 2. Therefore, the range hood provided in the embodiments of the present invention possesses the corresponding beneficial effects of the oil fume filter provided in the embodiments of the present invention, which will not be elaborated further here.

[0072] For example, the fume hood 2 is used to collect cooking fumes generated by the user, which are then filtered through the fume filter 1 before being discharged. The range hood may also include sensors, fume collection devices, etc., but this embodiment of the invention does not limit this.

[0073] Optionally, refer to Figures 9-11 The range hood may also include a fan system 3, which is located above the fume filter 1. The fume filter 1 is located between the fume collection hood 2 and the fan system 3. The fume collection hood 2 collects the cooking fumes generated by the user, which are then filtered by the fume filter 1 and discharged outdoors by the fan system 3. The fan system 3 may include components such as a fan.

[0074] The first control method for a range hood provided in this embodiment of the invention refers to... Figure 1 and Figure 12 The control method for a range hood can be executed by a processor within the range hood, and the control method includes:

[0075] Get the range hood setting.

[0076] The range hood settings include multiple levels with varying fume extraction capabilities, each corresponding to a specific heat output on the cooktop. For example, the settings might include progressively higher levels: low, high, and stir-fry. Further, additional levels could be included for more precise adjustments.

[0077] Adjust the spacing between adjacent longitudinal steel wires according to the range hood setting to the first distance.

[0078] The first distance refers to the spacing between adjacent longitudinal steel wires 13. The higher the range hood's setting, the smaller the first distance. The spacing between the transverse steel wires 12 remains unchanged. Adjusting the spacing between two adjacent longitudinal steel wires 13 changes the area of ​​the ventilation hole 14 formed by the intersection of the adjusted longitudinal steel wires 13 and transverse steel wires 12, thereby altering the range hood's fume filtration efficiency. For example, when the range hood is set to a low setting, the corresponding stove's heat is set to a lower setting, resulting in a lower concentration of fumes. A higher fume filtration efficiency is not required to filter and collect all the fumes, resulting in a larger first distance. When the range hood is set to a high setting, the corresponding stove's heat is set to a higher setting, resulting in a higher concentration of fumes, with a moderate fume filtration efficiency. When the range hood is set to a high-heat setting, the corresponding stove's heat is set to a high setting, resulting in a high concentration of fumes. A higher fume filtration efficiency is required, necessitating a smaller first distance to ensure that all harmful components in the indoor fumes are filtered and collected.

[0079] The oil fume filter control method provided in this embodiment of the invention adjusts a first distance according to the range hood speed. The higher the range hood speed, the smaller the first distance, which can adjust the area of ​​the ventilation holes 14 formed by the intersection of the horizontal and vertical steel wires 12 and thus change the oil fume filtration efficiency of the range hood. When the range hood speed is low, the first distance is large enough to filter and collect oil fumes. When the range hood speed is high, a higher oil fume filtration efficiency is required, so the first distance is small to improve the oil fume filtration effect. This achieves dynamic control of the spacing between adjacent vertical steel wires 13 of the oil fume filter according to the range hood speed, reducing the amount of oil fume adhering to the filter and improving the filtration efficiency of the oil fume filter.

[0080] Based on the above embodiments, the second control method for a range hood provided in this embodiment of the invention is as follows: Figure 1 and Figure 13 The control method for a range hood provided in this embodiment of the invention includes:

[0081] Get the range hood setting.

[0082] Based on the range hood's setting, adjust the cam's rotation angle as the first angle, and adjust the spacing between adjacent longitudinal steel wires as the first distance.

[0083] The smaller the first angle, the smaller the first distance. The cam 111 has a gradually changing inclined surface 1111 with varying thickness. Adjusting the rotation angle of the cam 111 changes the thickness of the gradually changing inclined surface 1111. The cam 111 and guide wheels 112 are spaced apart, changing the distance between adjacent guide wheels 112, thus changing the spacing between adjacent longitudinal wires 13. The smaller the first angle, the smaller the thickness of the cam 111, the smaller the distance between adjacent guide wheels 112, and the smaller the first distance; conversely, the larger the first angle, the larger the thickness of the cam 111, the larger the distance between adjacent guide wheels 112, and the larger the first distance.

[0084] For example, the range hood has three speed settings: low, high, and high-power (or "stir-fry"), which increase sequentially. When the range hood is in the high-power (or "stir-fry") setting, the motor 1110 drives the active spline shaft 113 to rotate at a first angle 'a', thereby adjusting the distance between adjacent longitudinal steel wires 13 to T1 (i.e., a first distance of T1), minimizing the area of ​​the ventilation holes 14 and maximizing the oil fume filtration efficiency. When the range hood is in the high setting, the motor 1110 drives the active spline shaft 113 to rotate at a first angle 'b', thereby adjusting the distance between adjacent longitudinal steel wires 13 to T2 (i.e., a first distance of T2), increasing the area of ​​the ventilation holes and decreasing the oil fume filtration efficiency. When the range hood is in the low setting, the motor 1110 drives the active spline shaft 113 to rotate at a first angle 'c', thereby adjusting the distance between adjacent longitudinal steel wires 13 to T3 (i.e., a first distance of T3), maximizing the area of ​​the ventilation holes 14 and minimizing the oil fume filtration efficiency. Where the first angle 'a' < 'b' < 'c', and the first distance 'T1' < 'T2' < 'T3'. It is understood that the above description is only exemplified by taking the range hood settings including low, high and stir-fry settings as an example. In other embodiments, the method of reducing the first distance can be set according to actual needs, and the embodiments of the present invention are not limited.

[0085] Obtain the initial oil fume filtration efficiency.

[0086] The initial fume filtration efficiency is the efficiency achieved after the range hood has been running for a period of time with the first distance adjusted. After prolonged operation, grease accumulates on the steel wires of the fume filter 1. Reducing the first distance can easily clog the ventilation holes 14, affecting the fume filtration efficiency. Therefore, it is necessary to retest the fume filtration efficiency. The initial fume filtration efficiency can be determined by collecting the fume concentration C1 near the inlet from a fume concentration sensor located at the inlet and the fume concentration C2 near the outlet from a fume concentration sensor located at the outlet.

[0087] Determine whether the initial fume filtration efficiency is less than the preset efficiency.

[0088] The preset efficiency is the minimum oil fume filtration efficiency corresponding to the current range hood setting. When the initial oil fume filtration efficiency is less than the preset efficiency, the initial oil fume filtration efficiency cannot meet the oil fume filtration requirements of the current range hood setting, and the oil fume filter needs to be further adjusted to ensure that the range hood can collect all the oil fumes in the current environment for filtration and discharge. When the initial oil fume filtration efficiency is greater than or equal to the preset efficiency, the initial oil fume filtration meets the oil fume filtration requirements of the current range hood setting, and the oil fume filter filters oil fumes normally.

[0089] Obtain the first compensation angle, and obtain the second angle based on the first compensation angle and the first angle.

[0090] If the initial fume filtration efficiency is less than the preset efficiency, a first compensation angle is obtained, and a second angle is obtained based on the first compensation angle and the first angle. The first compensation angle is the rotation angle of cam 111 when further adjusting the fume filter. The first compensation angle can be set according to the actual situation.

[0091] Optionally, the first angle is a, the first compensation angle is a1, the second angle is b, the initial oil fume filtration efficiency is η, and the preset efficiency is η1, satisfying: a1=a×(η1-η); b=a-a1.

[0092] For example, the first angle when the range hood is set to the stir-fry mode is denoted as the first stir-fry mode angle a. 01 The first compensation angle when the range hood is set to the stir-fry mode is denoted as the first stir-fry mode compensation angle a. 11 The second angle when the range hood is set to the high-power stir-fry setting is denoted as the second high-power stir-fry setting angle b. 01 Then it satisfies: a 11 =a 01 ×(η1-η); b 01 =a 01 -a 11 The first angle when the range hood is set to the high setting is denoted as the first high setting angle 'a'. 02 The first compensation angle when the range hood is set to the high setting is denoted as the first high setting compensation angle a. 12 The second angle when the range hood is set to the high setting is denoted as the second high setting angle b. 02 Then it satisfies: a 12 =a 02 ×(η1-η); b 02 =a 02 -a 12 The first angle when the range hood is set to the low setting is denoted as the first low setting angle a. 03 The first compensation angle when the range hood is set to the low setting is denoted as the first low setting compensation angle a. 13 The second angle when the range hood is set to the low setting is denoted as the second low setting angle b. 03 Then it satisfies: a13 =a 03 ×(η1-η); b 03 =a 03 -a 13 .

[0093] The fume filter is filtering fumes normally.

[0094] When the initial fume filtration efficiency is greater than or equal to the preset efficiency, the initial fume filtration meets the fume filtration requirements of the current setting of the range hood, and the fume filter screen filters the fume normally.

[0095] In this embodiment of the invention, the initial oil fume filtration efficiency of the range hood after running for a period of time is judged to be less than a preset efficiency. When the initial oil fume filtration efficiency is less than the preset efficiency, a second angle is obtained based on a first compensation angle and a first angle. The spacing between adjacent longitudinal steel wires 13 of the oil fume filter is adjusted, thereby adjusting the first distance so that the oil fume filtration efficiency of the oil fume filter meets the oil fume filtration requirements of the current setting of the range hood. The range hood can collect all the oil fumes in the current environment and filter and discharge them.

[0096] Based on the above embodiments, the third control method for a range hood provided in this embodiment of the invention is as follows: Figure 1 and Figure 14 The control method for a range hood provided in this embodiment of the invention includes:

[0097] Get the range hood setting.

[0098] Based on the range hood's setting, adjust the cam's rotation angle as the first angle, and adjust the spacing between adjacent longitudinal steel wires as the first distance.

[0099] Obtain the initial oil fume filtration efficiency.

[0100] Determine whether the initial fume filtration efficiency is less than the preset efficiency.

[0101] Obtain the first compensation angle, and obtain the second angle based on the first compensation angle and the first angle.

[0102] In this step, if the initial fume filtration efficiency is less than the preset efficiency, a first compensation angle is obtained, and a second angle is obtained based on the first compensation angle and the first angle.

[0103] The fume filter is filtering fumes normally.

[0104] When the initial fume filtration efficiency is greater than or equal to the preset efficiency, the initial fume filtration meets the fume filtration requirements of the current setting of the range hood, and the fume filter screen filters the fume normally.

[0105] To obtain the efficiency of fume filtration.

[0106] The second oil fume filtration efficiency is the oil fume filtration efficiency of the range hood after the cam 111 rotates to the second angle.

[0107] Determine whether the efficiency of the second oil fume filtration is less than the preset efficiency.

[0108] When the secondary fume filtration efficiency is less than the preset efficiency, the secondary fume filtration efficiency cannot meet the fume filtration requirements of the current setting of the range hood, and the fume filter needs to be adjusted again to ensure that the range hood can collect all the fumes in the current environment for filtration and discharge; when the secondary fume filtration efficiency is greater than or equal to the preset efficiency, the secondary fume filtration meets the fume filtration requirements of the current setting of the range hood, and the fume filter filters the fumes normally.

[0109] Obtain the second compensation angle, and obtain the third angle based on the second compensation angle and the second angle.

[0110] In this step, if the fume filtration efficiency is again less than the preset efficiency, a second compensation angle is obtained, and a third angle is obtained based on the second compensation angle and the second angle. The second compensation angle is the rotation angle of cam 111 when further adjusting the fume filter; the second compensation angle can be set according to actual conditions.

[0111] Optionally, the second angle is b, the second compensation angle is b1, the third angle is c, the second fume filtration efficiency is η2, and the preset efficiency is η1, satisfying: b1=b×(η1-η2); c=b-b1. This formula is satisfied when the range hood is in the stir-fry mode, strong mode, and weak mode, and will not be elaborated here. For details, please refer to the above situation when obtaining the second angle based on the first compensation angle and the first angle.

[0112] Obtain the initial airflow attenuation value.

[0113] In this step, if the fume filtration efficiency is greater than or equal to the preset efficiency again, the initial airflow attenuation value is obtained. This initial airflow attenuation value is the corresponding fan airflow attenuation value of the range hood after the second angle adjustment. The initial airflow attenuation value can be determined by an airflow detection sensor installed on the range hood, and it represents the amount of airflow passing through the fume filter. In other embodiments, the method for obtaining the initial airflow attenuation value can be set according to actual needs, and this embodiment of the invention does not limit this.

[0114] Determine whether the initial airflow attenuation value is greater than the preset attenuation value.

[0115] The preset attenuation value is the minimum airflow attenuation value corresponding to the current range hood setting. When the initial airflow attenuation value is greater than the preset attenuation value, the range hood's fan airflow meets the oil fume filtration requirements of the current setting, and the range hood can collect the oil fumes in the current environment for filtration and discharge without adjusting the fan airflow. When the initial airflow attenuation value is less than or equal to the preset attenuation value, the range hood's fan airflow cannot meet the oil fume filtration requirements of the current setting, and the fan airflow needs to be increased to collect all the oil fumes.

[0116] Increase the fan speed.

[0117] In this step, if the initial airflow attenuation value is less than or equal to the preset attenuation value, the fan speed is increased.

[0118] For example, the initial airflow attenuation value is denoted as Σ1, and the preset attenuation value is denoted as Σ. The initial fan speed in the stir-fry mode is N1, and the compensating fan speed in the stir-fry mode is N... a Satisfy: N a = N1×(Σ1-Σ). The initial speed of the fan in high gear is N2, and the speed of the compensated fan in high gear is N. b Satisfy: N b = N2×(Σ1-Σ). The initial fan speed in the weak setting is N3, and the weak setting compensation fan speed is N... c Satisfy: N c =N3×(Σ1-Σ).

[0119] No adjustment of the fan airflow is required.

[0120] In this step, if the initial airflow attenuation value is greater than the preset attenuation value, no adjustment to the fan airflow is required.

[0121] In this embodiment of the invention, the efficiency of the second oil fume filtration of the range hood after the second angle adjustment is determined to be less than a preset efficiency. If the second oil fume filtration efficiency is less than the preset efficiency, a third angle is obtained based on the second compensation angle and the second angle, and the spacing between adjacent longitudinal steel wires 13 of the oil fume filter is adjusted again, thereby adjusting the first distance so that the oil fume filtration efficiency of the oil fume filter meets the oil fume filtration requirements of the current setting of the range hood, and the range hood can collect all the oil fumes in the current environment for filtration and discharge. If the second oil fume filtration efficiency is greater than or equal to the preset efficiency, the initial air volume attenuation value of the fan is determined to be greater than the preset attenuation value. If the initial air volume attenuation value is less than or equal to the preset attenuation value, the fan speed is increased.

[0122] Further, the airflow attenuation value is obtained, and it is determined whether the airflow attenuation value is greater than the preset attenuation value. If the airflow attenuation value is less than or equal to the preset attenuation value, the fan speed is increased. The above cycle is repeated until the airflow attenuation value is greater than the preset attenuation value.

[0123] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. An oil fume filter, characterized in that, It includes a drive module (11), a horizontal steel wire (12) and a vertical steel wire (13), wherein the horizontal steel wire (12) and the vertical steel wire (13) intersect to form a ventilation hole (14). The drive module (11) includes guide wheels (112) and driven spline shaft (114); a plurality of guide wheels (112) are disposed on the driven spline shaft (114), the guide wheels (112) guide the movement of the transverse steel wire (12) and / or the longitudinal steel wire (13), and the guide wheels (112) slide along the driven spline shaft (114); The drive module (11) also includes cams (111) and a drive spline shaft (113), with a plurality of cams (111) disposed on the drive spline shaft (113); A cam (111) is sandwiched between two adjacent guide wheels (112) disposed on the same driving spline shaft (113). When the cam (111) slides along the driving spline shaft (113), it drives the guide wheel (112) to slide along the driven spline shaft (114). The cam (111) has a gradually changing slope (1111); when the cam (111) rotates, the cam (111) has an axial force on the drive spline shaft (113), causing the cam (111) to slide along the extension direction of the drive spline shaft (113); The drive module (11) further includes a drive gear (115) and a driven gear (116); the drive module (11) also includes an elastic element (117), which is disposed on the drive spline shaft (113) and between the drive gear (115) and the cam (111).

2. The oil fume filter according to claim 1, characterized in that, The driving gear (115) is connected to the driving spline shaft (113), the driven gear (116) is connected to the driven spline shaft (114), and the driving gear (115) meshes with the driven gear (116).

3. The oil fume filter according to claim 2, characterized in that, The drive module (11) also includes a first bearing housing (1181), a first bearing (1182), a second bearing housing (1191), and a second bearing (1192). The end of the active spline shaft (113) is mounted on the first bearing (1182), and the first bearing (1182) is mounted on the first bearing housing (1181). The end of the driven spline shaft (114) is mounted on the second bearing (1192), and the second bearing (1192) is mounted on the second bearing housing (1191).

4. A range hood, characterized in that, It includes the oil fume filter (1) and the smoke collection hood (2) as described in claim 1, wherein the oil fume filter (1) is disposed above the smoke collection hood (2).

5. A control method for the range hood according to claim 4, characterized in that, include: Get the range hood setting; According to the range hood speed, the distance between adjacent longitudinal steel wires (13) is adjusted to a first distance; wherein, the larger the range hood speed, the smaller the first distance; The drive module (11) also includes a drive gear (115) and a driven gear (116), the drive gear (115) being connected to a drive spline shaft (113), the driven gear (116) being connected to a driven spline shaft (114), and the drive gear (115) meshing with the driven gear (116); the cam (111) has a gradually changing inclined surface (1111). According to the range hood setting, the spacing between adjacent longitudinal steel wires (13) is adjusted to a first distance, including: According to the range hood gear position, the rotation angle of the cam (111) is adjusted to a first angle, and the distance between adjacent longitudinal steel wires (13) is adjusted to a first distance; wherein, the smaller the first angle, the smaller the first distance; After adjusting the rotation angle of the cam (111) to a first angle according to the range hood gear position, and adjusting the spacing between adjacent longitudinal steel wires (13) to a first distance, the method further includes: Obtain the initial oil fume filtration efficiency; Determine whether the initial oil fume filtration efficiency is less than the preset efficiency; If the initial fume filtration efficiency is less than the preset efficiency, a first compensation angle is obtained, and a second angle is obtained based on the first compensation angle and the first angle; in order to reduce the spacing between adjacent longitudinal steel wires to improve the fume filtration efficiency.

6. The control method according to claim 5, characterized in that, The first angle is The first compensation angle is The second angle is The initial oil fume filtration efficiency is The preset efficiency is ,satisfy: ； 。 7. The control method according to claim 5, characterized in that, After obtaining the first compensation angle and obtaining the second angle based on the first compensation angle and the first angle, the method further includes: To improve the efficiency of fume filtration; Determine whether the secondary oil fume filtration efficiency is less than the preset efficiency; If the second oil fume filtration efficiency is less than the preset efficiency, a second compensation angle is obtained, and a third angle is obtained based on the second compensation angle and the second angle.

8. The control method according to claim 7, characterized in that, The second angle is The second compensation angle is The third angle is The efficiency of the secondary oil fume filtration is The preset efficiency is ,satisfy: ； 。 9. The control method according to claim 7, characterized in that, After determining whether the re-filtration efficiency of the oil fume is less than the preset efficiency, the method further includes: If the secondary fume filtration efficiency is greater than or equal to the preset efficiency, then the initial air volume attenuation value is obtained. Determine whether the initial airflow attenuation value is greater than the preset attenuation value; If the initial airflow attenuation value is less than or equal to the preset attenuation value, then the fan speed is increased.

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