Control method of range hood and range hood

Abstract

The invention relates to the technical field of kitchen appliances, and particularly discloses a control method of an extractor hood and the extractor hood. The control method of the extractor hood comprises the steps that the initial concentration of particulate matter in the environment where the extractor hood is located is obtained; determining that the extractor hood is started; the actual concentration of particulate matter entering the range hood is obtained in real time, the particulate matter concentration difference value is calculated, and the particulate matter concentration difference value = the actual concentration-the initial concentration; the temperature of the sealing ring is adjusted based on the particulate matter concentration difference value, the sealing performance of the sealing ring can be matched with the actual concentration of the particulate matter entering the range hood, then the requirement for the sealing performance of the sealing ring under the current working condition is met, and the reliable sealing performance of the sealing ring under different cooking working conditions can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a control method for a range hood and a range hood itself. Background Technology

[0002] A range hood, also known as a kitchen exhaust hood or cooking hood, is a kitchen appliance that purifies the kitchen environment. Installed above the stove, it quickly removes the exhaust fumes from the stove and the harmful oil fumes produced during cooking, expelling them outdoors.

[0003] With prolonged use, the electronic components of range hoods are susceptible to damage from water and oil. Therefore, the requirements for the waterproof and oil-proof performance of these components are becoming increasingly stringent. Take the switch assembly as an example: it is typically installed within a cavity formed by a panel, a liner, and a sealing cover. The panel and liner are bonded together, and a sealing ring is placed between the sealing cover and the liner to ensure the cavity's airtightness. However, the sealing performance of the sealing ring is limited, while the cooking conditions of a range hood are complex and varied. Under different cooking conditions, the sealing ring needs to withstand different levels of water and oil, making existing sealing methods insufficient to meet the diverse needs of range hoods.

[0004] Therefore, there is an urgent need for a control method and a range hood to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a control method and a range hood for a range hood, so that the sealing performance of the sealing ring can be matched with different cooking conditions.

[0006] On one hand, the present invention provides a control method for a range hood, the range hood being installed above a cooktop, the range hood including a receiving cavity for accommodating electronic components and a sealing ring for sealing the receiving cavity, the control method for the range hood including:

[0007] Obtain the initial concentration of particulate matter in the environment where the range hood is located;

[0008] Make sure the range hood is turned on;

[0009] The actual concentration of particulate matter entering the range hood is obtained in real time, and the particulate matter concentration difference is calculated, where the particulate matter concentration difference = actual concentration - initial concentration;

[0010] The temperature of the sealing ring is adjusted based on the difference in particulate matter concentration.

[0011] As a preferred technical solution for controlling a range hood, determining that turning on the range hood includes:

[0012] Obtain the initial temperature of the environment where the range hood is located;

[0013] The actual temperature of the stove surface is acquired in real time, and the temperature difference is calculated, where the temperature difference = actual temperature - initial temperature;

[0014] Compare the temperature difference with the preset temperature;

[0015] Turn on the range hood when the temperature difference is not less than the preset temperature.

[0016] As a preferred technical solution for the control method of a range hood, adjusting the temperature of the sealing ring based on the particulate matter concentration difference includes:

[0017] Compare the difference in particulate matter concentration with the preset particulate matter concentration;

[0018] When the particulate matter concentration difference is not less than the preset particulate matter concentration, the target working temperature of the sealing ring is determined based on the particulate matter concentration difference, and the sealing ring is heated to the target working temperature.

[0019] When the particulate matter concentration difference is less than the preset particulate matter concentration, heating of the sealing ring is stopped.

[0020] The control method for this range hood includes:

[0021] The control method for a range hood provided by this invention has at least the following beneficial effects:

[0022] The control method of this range hood obtains the initial concentration of particulate matter in the environment where the range hood is located; determines that the range hood is turned on; obtains the actual concentration of particulate matter entering the range hood in real time and calculates the particulate matter concentration difference; and adjusts the temperature of the sealing ring based on the particulate matter concentration difference. This allows the sealing performance of the sealing ring to be adapted to the actual concentration of particulate matter entering the range hood, thereby meeting the sealing performance requirements of the sealing ring under the current operating conditions and ensuring reliable sealing performance of the sealing ring under different cooking conditions.

[0023] On the other hand, the present invention provides a range hood for executing the control method of the range hood in any of the above-mentioned schemes. The range hood is disposed above the stove. The range hood includes a receiving cavity, a sealing ring for sealing the receiving cavity, electronic components disposed in the receiving cavity, a temperature regulating component for adjusting the temperature of the sealing ring, a temperature sensor for detecting the temperature, and a particulate matter concentration sensor for detecting the particulate matter concentration.

[0024] As a preferred technical solution for a range hood, the range hood further includes:

[0025] The smoke hood is equipped with a smoke inlet.

[0026] The main unit is fixedly connected to the smoke collection hood, and the inner cavity of the main unit is in communication with the inner cavity of the smoke collection hood;

[0027] The fan is installed inside the main unit housing;

[0028] A smoke-collecting plate is rotatably connected to the smoke-collecting hood, and the smoke-collecting plate is used to open or close the smoke inlet;

[0029] A cover is fixedly disposed on the smoke-collecting plate, the cover and the smoke-collecting plate forming the receiving cavity, and the receiving cavity has an opening;

[0030] A sealing cap for closing the opening, and a sealing ring disposed between the sealing cap and the cover.

[0031] As a preferred technical solution for range hoods, the cover is provided with a sealing groove, and the sealing ring is inserted into the sealing groove.

[0032] As a preferred technical solution for a range hood, the cover includes a first plate and a second plate arranged in parallel and spaced apart, and a third plate connected between the first plate and the second plate, wherein the first plate, the second plate and the third plate form the sealing groove;

[0033] The second plate is inserted into the sealing ring; and / or, the third plate is provided with a groove, the groove is provided around the opening, and the sealing ring is provided with a protrusion, the protrusion being inserted into the groove.

[0034] As a preferred technical solution for a range hood, along the circumference of the opening, the sealing ring is provided with a plurality of first latching protrusions at intervals, and the first plate is provided with a plurality of first latching grooves at intervals, with the plurality of first latching protrusions and the plurality of first latching grooves corresponding one-to-one and interference fit; and / or, along the circumference of the opening, the sealing ring is provided with a plurality of second latching protrusions at intervals, and the second plate is provided with a plurality of second latching grooves at intervals, with the plurality of second latching protrusions and the plurality of second latching grooves corresponding one-to-one and interference fit.

[0035] As a preferred technical solution for range hoods, the sealing cover is bonded and / or inserted into the sealing ring.

[0036] As a preferred technical solution for a range hood, when the sealing cover is inserted into the sealing ring, the sealing cover includes a cover plate, a first insert connected to the cover plate, and a second insert connected to the cover plate. The second insert is parallel to and spaced apart from the first insert. The sealing ring is provided with a first slot and a second slot spaced apart. The first insert is inserted into the first slot; the second insert is inserted into the second slot, and the height of the second insert protruding from the cover plate is less than the height of the first insert protruding from the cover plate.

[0037] The range hood provided by this invention has at least the following beneficial effects:

[0038] The sealing ring of this range hood can adjust the temperature according to changes in cooking conditions, thereby adapting to the sealing requirements under different cooking conditions. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the first structure of the range hood in an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the second structure of the range hood in an embodiment of the present invention;

[0041] Figure 3 This is an exploded view of a partial structure of the range hood in an embodiment of the present invention;

[0042] Figure 4 This is a cross-sectional view of the first partial structure of the range hood in an embodiment of the present invention;

[0043] Figure 5 This is an exploded view of the sealing cap and sealing ring in an embodiment of the present invention;

[0044] Figure 6 for Figure 4 Enlarged view of point A in the middle;

[0045] Figure 7 This is a cross-sectional view of the sealing ring in an embodiment of the present invention;

[0046] Figure 8 This is a cross-sectional view of the second partial structure of the range hood in an embodiment of the present invention;

[0047] Figure 9 This is a cross-sectional view of the third partial structure of the range hood in an embodiment of the present invention;

[0048] Figure 10 for Figure 9 Enlarged view at point B;

[0049] Figure 11 This is a cross-sectional view of the fourth partial structure of the range hood in an embodiment of the present invention;

[0050] Figure 12 This is a cross-sectional view of the fifth partial structure of the range hood in an embodiment of the present invention;

[0051] Figure 13 for Figure 12 A magnified view at point C;

[0052] Figure 14 This is a cross-sectional view of the sealing cap in an embodiment of the present invention;

[0053] Figure 15 for Figure 14 A magnified view at point D;

[0054] Figure 16 This is a partial structural diagram of the range hood in an embodiment of the present invention;

[0055] Figure 17 This is a first flowchart of the control method for a range hood in an embodiment of the present invention;

[0056] Figure 18 This is a second flowchart of the control method for a range hood in an embodiment of the present invention.

[0057] In the picture:

[0058] 1. Smoke hood; 101. Smoke inlet;

[0059] 2. Main unit chassis; 3. Switch assembly; 4. Smoke collection plate;

[0060] 5. Sealing ring; 501. First slot; 502. First slot wall; 503. Second slot wall; 504. First guide slot wall; 505. Second guide slot wall; 506. Second slot; 507. Third slot wall; 508. Third guide slot wall; 509. Third slot; 510. Protrusion; 511. First locking protrusion; 512. Second locking protrusion;

[0061] 6. Oil mesh;

[0062] 7. Cover; 701. Receiving cavity; 702. Opening; 703. Base plate; 704. Enclosure plate; 7041. First plate; 7042. Second plate; 7043. Third plate; 7044. Sealing groove; 7045. Groove; 7046. First slot; 7047. Second slot; 7048. Cable outlet;

[0063] 8. Sealing cap; 801. Cover plate; 802. First insert; 803. Second insert;

[0064] 9. Temperature sensor;

[0065] 10. Mounting base; 1001. First mounting plate; 1002. Second mounting plate; 1003. Third mounting plate;

[0066] 111. First dispensing tank; 112. Second dispensing tank; 113. Third dispensing tank;

[0067] 12. Temperature control component; 13. Handle; 14. Lighting lamp; 15. Cable guard; 16. Wire harness. Detailed Implementation

[0068] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] 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. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0070] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0071] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown 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 are only used to explain the present invention, and should not be construed as limiting the present invention.

[0072] This embodiment provides a range hood, specifically a side-draft range hood, which can be used in the kitchen and installed above the stove to treat the fumes generated during cooking. In other embodiments, the range hood can also be a top-draft range hood, etc.

[0073] Specifically, please refer to Figures 1 to 3The range hood includes a receiving cavity 701, electronic components housed within the receiving cavity 701, and a sealing ring 5 for sealing the receiving cavity 701. The sealing ring 5 ensures the sealing performance of the receiving cavity 701, thereby preventing the electronic components from being affected by water or oil when the range hood is in operation.

[0074] In this embodiment, the electronic component is described using switch assembly 3 as an example. Switch assembly 3 is used to control the start and stop of the fan, as well as the fan speed. In other embodiments, the electronic component can also be configured as a sensor, control circuit board, etc., depending on actual needs.

[0075] In an alternative embodiment, please refer to Figure 1 and Figure 2 The range hood also includes a smoke collection hood 1, a main unit housing 2, and a fan (not shown in the attached diagram). The smoke collection hood 1 has a smoke inlet 101, and a smoke gathering plate 4 is rotatably connected to the smoke collection hood 1, which is used to open or close the smoke inlet 101. The main unit housing 2 is connected to the smoke collection hood 1, and the inner cavity of the main unit housing 2 communicates with the inner cavity of the smoke collection hood 1. The fan is fixedly installed inside the main unit housing 2. With this configuration, when the range hood is working, the smoke gathering plate 4 collects oil fumes, steam, and other particulate matter. Driven by the negative pressure provided by the fan, the oil fumes enter the smoke collection hood 1 from the smoke inlet 101, then enter the main unit housing 2, and are discharged into the exhaust duct by the fan.

[0076] In an alternative embodiment, please refer to Figure 1 and Figure 2 The range hood also includes an oil filter 6 connected to the smoke collection hood 1. The oil filter 6 is located at the smoke inlet 101 and is used to filter particulate matter in the smoke.

[0077] In an alternative embodiment, please refer to Figure 3 The switch assembly 3 is located on the back of the smoke collection plate 4, that is, the switch assembly 3 is located on the side of the smoke collection plate 4 facing the smoke collection hood 1, and the switch assembly 3 can be operated from the front of the smoke collection plate 4.

[0078] In an alternative embodiment, please refer to Figures 3 to 5 The range hood also includes a housing 7 and a sealing cover 8. The housing 7 is fixedly mounted on the smoke-collecting plate 4, and the housing 7 and the smoke-collecting plate 4 form a receiving cavity 701. The receiving cavity 701 has an opening 702, and the sealing cover 8 is used to close the opening 702. A sealing ring 5 is disposed between the sealing cover 8 and the housing 7. This arrangement prevents oil and water from entering the receiving cavity 701 through the sealing ring 5, thereby protecting the switching assembly 3 inside the receiving cavity 701. It can be understood that in this embodiment, the sealing ring 5 is annular and surrounds the opening 702, thus sealing the receiving cavity 701 through the sealing ring 5.

[0079] In an alternative embodiment, please refer to Figure 3 and Figure 4 The housing 7 includes a base plate 703 that fits against the smoke-collecting plate 4, and a surrounding plate 704 protruding from the base plate 703. The surrounding plate 704 and the smoke-collecting plate 4 form a receiving cavity 701, and an opening 702 is provided in the surrounding plate 704. The surrounding plate 704 and the base plate 703 are integrally formed. In other embodiments, the base plate 703 and the surrounding plate 704 can also be separately provided, and the base plate 703 and the surrounding plate 704 can be assembled by welding, bonding or other processes.

[0080] In an alternative embodiment, please refer to Figure 3 and Figure 4 The smoke collection plate 4 is made of glass, and the cover 7 is formed by stretching sheet metal. The cover 7 and the smoke collection plate 4 can be fixed together by adhesive, which can be silicone glue.

[0081] Because the cooking conditions of a range hood are complex and varied, the sealing ring 5 needs to withstand different effects of water and oil under different cooking conditions. However, the sealing performance of a single sealing ring 5 is fixed. This can easily lead to the sealing performance of the sealing ring 5 on the receiving cavity 701 failing to meet the actual needs of the range hood under certain conditions.

[0082] For this, please refer to Figure 6 and Figure 7 In this embodiment, the range hood also includes a temperature regulating component 12 embedded in the sealing ring 5. The temperature regulating component 12 is used to adjust the temperature of the sealing ring 5. When the range hood is in use, the temperature of the sealing ring 5 is adjusted according to the different operating conditions of the range hood, thereby causing the sealing ring 5 to expand to different degrees, so that the sealing ring 5 has different sealing performance to meet the sealing performance requirements of the sealing ring 5 under different operating conditions. Specifically, the initial volume of the sealing ring 5 at a set room temperature is V0, the expansion coefficient of the sealing ring 5 with respect to temperature change is α, and the volume of the sealing ring 5 after a temperature change ΔT is V1, where V1 = V0 * α * T. When the volume of the sealing ring 5 changes, the tightness of the fit between the sealing ring 5 and the cover 7 and the sealing cap 5 also varies, thus providing different sealing performance.

[0083] It should be noted that the temperature regulating element 12 can heat and / or cool the sealing ring 5. In this embodiment, the temperature regulating element 12 is exemplarily provided as an electric heating wire, which, when activated, heats the sealing ring 5. When the electric heating wire stops, the temperature of the sealing ring 5 gradually decreases to room temperature. In other embodiments, the temperature regulating element 12 can also be configured as a heat exchange tube, through which a heat exchange medium flows, and the temperature of the sealing ring 5 is adjusted by regulating the temperature of the heat exchange medium; alternatively, the temperature regulating element 12 includes a first heat exchange tube and a second heat exchange tube, with a refrigerant flowing through the first heat exchange tube and a heat exchange medium flowing through the second heat exchange tube, and the temperature of the sealing ring 5 is adjusted by regulating the flow rate and temperature of the refrigerant and heat exchange medium.

[0084] In an alternative embodiment, please refer to Figure 1 The range hood also includes a temperature sensor 9 for detecting temperature. The temperature sensor 9 can detect the temperature of the environment in which the range hood is located, and it can also detect the temperature of the surface of the cooktop below.

[0085] In an alternative embodiment, please refer to Figure 1 The range hood also includes a particulate matter concentration sensor (not shown in the attached figure). The particulate matter concentration sensor can detect the particulate matter concentration in the environment where the range hood is located, and can also detect the particulate matter concentration in the smoke flowing through the sealing cover 8 or entering the smoke collection hood 1. Furthermore, the number of particulate matter concentration sensors can be set according to actual needs.

[0086] In an alternative embodiment, please refer to Figures 6 to 8 The sealing cover 8 and the sealing ring 5 are inserted into each other. This arrangement ensures the stability of the connection between the sealing cover 8 and the sealing ring 5, as well as the reliability of the seal.

[0087] In an alternative embodiment, please refer to Figures 6 to 8 The sealing cover 8 includes a cover plate 801 and a first insert 802 connected to the cover plate 801. The sealing ring 5 is provided with a first slot 501, and the first insert 802 is inserted into the first slot 501. The first insert 802 and the first slot 501 are both arranged around the opening 702.

[0088] In an alternative embodiment, please refer to Figures 6 to 8 The sealing cover 8 also includes a second insert 803 connected to the cover plate 801. The second insert 803 is parallel to and spaced apart from the first insert 802. The sealing ring 5 is also provided with a second slot 506. The second insert 803 is inserted into the second slot 506, and the height of the second insert 803 protruding from the cover plate 801 is less than the height of the first insert 802 protruding from the cover plate 801. The second insert 803 and the second slot 506 are also arranged around the opening 702. The first insert 802 is located inside the second insert 803. By having the second insert 803 and the first insert 802 simultaneously engage with the sealing ring 5, the connection strength between the sealing cover 8 and the sealing ring 5 can be further improved. Furthermore, an insertion groove can also be formed between the second insert 803 and the first insert 802, and a part of the sealing ring 5 is inserted into the insertion groove, which can further improve the stability of the connection between the sealing ring 5 and the sealing cover 8. In addition, by making the height of the second insert 803 protruding from the cover plate 801 less than the height of the first insert 802 protruding from the cover plate 801, the overall strength and rigidity of the sealing cover 8 can be significantly enhanced, and it is easier to assemble with the sealing ring 5.

[0089] In an optional embodiment, the cover plate 801 and the second insert 803 are integrally formed, the second insert 803 is formed by a flange disposed on the outer periphery of the cover plate 801, and the first insert 802 is welded to the sealing cover 8.

[0090] In an alternative embodiment, please refer to Figures 6 to 8 The sealing cap 8 is bonded to the sealing ring 5. This arrangement ensures the stability of the connection between the sealing cap 8 and the sealing ring 5, as well as the reliability of the seal between the sealing ring 5 and the sealing cap 8.

[0091] In an alternative embodiment, please refer to Figure 7 The first slot 501 includes a first slot wall 502, a second slot wall 503, a first guide slot wall 504, and a second guide slot wall 505. The first slot wall 502 and the second slot wall 503 are parallel and spaced apart. The first guide slot wall 504 is connected to the first slot wall 502 at an angle, and the second guide slot wall 505 is connected to the second slot wall 503 at an angle. The distance between the first guide slot wall 504 and the second guide slot wall 505 gradually decreases along the direction in which the first insert 802 is inserted into the first slot 501. The first guide slot wall 504 and the second guide slot wall 505 are used to guide the first insert 802 to be inserted between the first slot wall 502 and the second slot wall 503. With this configuration, when assembling the sealing ring 5, the first guide slot wall 504 and the second guide slot wall 505 guide the first insert 802 to be smoothly inserted between the first slot wall 502 and the second slot wall 503, thereby improving the ease of assembly.

[0092] Specifically, in this embodiment, the first guide groove wall 504 and the second guide groove wall 505 form a funnel-shaped groove. The distance between the first groove wall 502 and the second groove wall 503 is not greater than the thickness of the first insert 802, so that the first insert 802 can smoothly enter between the first groove wall 502 and the second groove wall 503 through the groove. In this embodiment, both the first guide groove wall 504 and the second guide groove wall 505 are formed by a straight chamfer. In other embodiments, the first guide groove wall 504 and the second guide groove wall 505 can also be formed by a rounded chamfer.

[0093] In an alternative embodiment, please refer to Figure 6 and Figure 13The first groove wall 502, the first insert 802, and the cover plate 801 form a first glue-filling groove 111, and the second groove wall 503, the first insert 802, and the cover plate 801 form a second glue-filling groove 112. Both the first glue-filling groove 111 and the second glue-filling groove 112 are used to fill adhesive. This arrangement makes full use of the space formed by the first guide groove wall 504 and the second guide groove wall 505, the first insert 802, and the cover plate 801 for glue filling, eliminating the need to process a separate glue-filling groove on the sealing ring 5 or the sealing cover 8, resulting in a simple structure. Furthermore, the adhesive simultaneously connects the cover plate 801, the sealing ring 5, and the first insert 802 together, ensuring the stability of the connection between the sealing cover 8 and the sealing ring 5.

[0094] In an alternative embodiment, please refer to Figure 7 The second slot 506 includes a third slot wall 507 and a third guide slot wall 508. The third guide slot wall 508 is connected to the third slot wall 507 at an angle, and the third guide slot wall 508 is used to guide the second insert 803 to contact the third slot wall 507. Specifically, in this embodiment, the first slot wall 502 is located between the third slot wall 507 and the second slot wall 503. The first end of the third guide slot wall 508 is connected to the third slot wall 507, and the second end of the third guide slot wall 508 is closer to the first slot wall 502 than the first end of the third guide slot wall 508. Therefore, when assembling the sealing ring 5, the second insert 803 can smoothly contact the third slot wall 507 by being guided by the third guide slot wall 508, thereby improving the convenience of assembly.

[0095] In an optional embodiment, the distance between the first groove wall 502 and the third groove wall 507 is not less than the distance between the second insert 803 and the first insert 802, so that the sealing ring 5 can be more securely assembled with the first insert 802 and the second insert 803.

[0096] In addition, in this embodiment, the third guide groove wall 508 is formed by a straight chamfer, while in other embodiments, the third guide groove wall 508 can also be formed by a rounded chamfer.

[0097] In an alternative embodiment, please refer to Figure 6 The third groove wall 507, the second insert 803, and the cover plate 801 are configured to form a third glue-filling groove 113, which is used to fill the glue. This configuration fully utilizes the space formed by the third guide groove wall 508, the second insert 803, and the cover plate 801 for glue injection, eliminating the need to separately machine a glue-filling groove on the sealing ring 5 or the sealing cover 8, resulting in a simple structure. Of course, in other embodiments, a glue-filling groove for glue injection can also be directly provided on the sealing ring 5 or the sealing cover 8 as needed.

[0098] It should be noted that the adhesive poured into the first glue-pouring tank 111, the second glue-pouring tank 112, and the third glue-pouring tank 113 can be selected according to actual needs. In this embodiment, a solution of pouring with 502 glue is provided as an example; in other embodiments, polyurethane or other adhesives can also be used.

[0099] In an alternative embodiment, please refer to Figure 2 , Figures 9 to 11 The range hood also includes multiple mounting seats 10 located within the receiving cavity 701. Each mounting seat 10 is fixedly connected to the smoke collection plate 4 or the cover 7, and the switch assembly 3 is mounted on the multiple mounting seats 10. This arrangement, by fixing the switch assembly 3 with the mounting seats 10, ensures the stability of the switch assembly 3's position within the receiving cavity 701; in addition, the identical structure of each mounting seat 10 effectively reduces the number of parts.

[0100] in, Figure 10 The example provides a scheme for fixing the mounting base 10 to the cover 7. The mounting base 10 is Z-shaped and includes a first mounting plate 1001, a second mounting plate 1002, and a third mounting plate 1003 connected in sequence. The first mounting plate 1001 and the third mounting plate 1003 are spaced apart and parallel to each other. The second mounting plate 1002 is perpendicular to both the first mounting plate 1001 and the third mounting plate 1003, and is parallel to the smoke collection plate 4. The first mounting plate 1001 is welded to the cover 7. A portion of the second mounting plate 1002 is welded to the cover 7, and the other portion of the second mounting plate 1002 is suspended and has mounting holes for fixing the switch assembly 3. The third mounting plate 1003 is used to enhance the overall structural strength of the mounting base 10. Preferably, the third mounting plate 1003 abuts against the smoke collection plate 4.

[0101] Figure 11 The example provides a scheme for fixing the mounting base 10 to the smoke collection plate 4. The mounting base 10 is U-shaped and includes a first mounting plate 1001, a second mounting plate 1002, and a third mounting plate 1003 connected in sequence. The first mounting plate 1001 and the third mounting plate 1003 are spaced apart and parallel to each other. The second mounting plate 1002 is perpendicular to both the first mounting plate 1001 and the third mounting plate 1003. The first mounting plate 1001 is fixed to the smoke collection plate 4 with glue. The third mounting plate 1003 is suspended and has mounting holes for fixing the switch assembly 3.

[0102] In an alternative embodiment, please refer to Figure 6 and Figure 8The housing 7 is provided with a sealing groove 7044, and the sealing ring 5 is inserted into the sealing groove 7044. This arrangement ensures that the relative position of the sealing ring 5 and the housing 7 is stable after assembly, and forms a sealing path with the same contour as the sealing groove 7044, thereby preventing oil, water, etc., from entering the receiving cavity 701 and ensuring a good seal. Preferably, the sealing ring 5 is interference-fitted into the sealing groove 7044, so that it can have strong sealing performance even without heating.

[0103] In an alternative embodiment, please refer to Figure 6 and Figure 8 The cover 7 includes a first plate 7041 and a second plate 7042 arranged in parallel and spaced apart, and a third plate 7043 connected between the first plate 7041 and the second plate 7042. The first plate 7041, the second plate 7042, and the third plate 7043 form a sealing groove 7044. Specifically, the sealing groove 7044 is disposed on the surrounding plate 704, the third plate 7043 is arranged parallel to the smoke collecting plate 4, the first plate 7041 and the second plate 7042 are both perpendicular to the third plate 7043, and the opening 702 is formed by the second plate 7042, so that the sealing groove 7044 is U-shaped, thereby enabling the sealing ring 5 and the groove wall of the sealing groove 7044 to form a U-shaped sealing path. In other embodiments, the sealing groove 7044 can also be other shapes as needed.

[0104] Specifically, in this embodiment, the second insert 803 and the first insert 802 are both located between the first plate 7041 and the second plate 7042, with the second insert 803 being disposed adjacent to the first plate 7041 and the first insert 802 being centrally located between the first plate 7041 and the second plate 7042.

[0105] In an alternative embodiment, please refer to Figures 6 to 8 The second plate 7042 is inserted into the sealing ring 5. This arrangement not only improves the stability of the fit between the sealing ring 5 and the cover 7, but also extends the sealing path, thereby improving the reliability of the sealing effect. Specifically, the sealing ring 5 is also provided with a third slot 509, into which the second plate 7042 is inserted.

[0106] In an alternative embodiment, please refer to Figures 6 to 8The third plate 7043 is provided with a groove 7045, and the sealing ring 5 is also provided with a protrusion 510, which is inserted into the groove 7045. Specifically, the groove 7045 and the protrusion 510 are both provided around the opening 702. By engaging the protrusion 510 with the groove 7045, the sealing path can be made more tortuous and the sealing path can be extended to further improve the reliability of the sealing effect. Preferably, the third plate 7043 is provided with a plurality of grooves 7045 at intervals, and the sealing ring 5 is provided with a plurality of protrusions 510 at intervals, with the plurality of protrusions 510 correspondingly inserted into the plurality of grooves 7045. In this embodiment, an exemplary scheme is provided in which the third plate 7043 is provided with two grooves 7045 at intervals and the sealing ring 5 is provided with two protrusions 510 at intervals.

[0107] In other embodiments, a groove 7045 may be provided on the first plate 7041, and a corresponding protrusion 510 may be provided on the sealing ring 5, with the protrusion 510 inserting into the groove 7045 on the first plate 7041; or, a groove 7045 may be provided on the second plate 7042, and a corresponding protrusion 510 may be provided on the sealing ring 5, with the protrusion 510 inserting into the groove 7045 on the second plate 7042.

[0108] In an alternative embodiment, please refer to Figures 5 to 9 Along the circumference of the opening 702, the sealing ring 5 is provided with a plurality of first locking protrusions 511 at intervals, and the first plate 7041 is provided with a plurality of first locking grooves 7046 at intervals. The plurality of first locking protrusions 511 and the plurality of first locking grooves 7046 are interference-fitted one-to-one. This arrangement can further improve the stability of the connection between the sealing ring 5 and the cover 7. Specifically, the first locking protrusions 511 and the first locking grooves 7046 are both hemispherical, and the radius of the first locking protrusions 511 is 1.2 to 1.5 times the radius of the first locking grooves 7046, so that the first locking protrusions 511 and the first locking grooves 7046 can be interference-fitted.

[0109] In an alternative embodiment, please refer to Figure 5 and Figure 9 Along the circumference of the opening 702, the sealing ring 5 is provided with a plurality of second locking protrusions 512 at intervals, and the second plate 7042 is provided with a plurality of second locking grooves 7047 at intervals. The plurality of second locking protrusions 512 and the plurality of second locking grooves 7047 are interference-fitted one-to-one. This arrangement can further improve the stability of the connection between the sealing ring 5 and the cover 7. Specifically, the second locking protrusions 512 and the second locking grooves 7047 are both hemispherical, and the radius of the second locking protrusions 512 is 1.2 to 1.5 times the radius of the second locking grooves 7047, so that the second locking protrusions 512 and the second locking grooves 7047 can be interference-fitted.

[0110] In an alternative embodiment, please refer to Figure 3 and Figure 4The range hood also includes a handle 13 fixedly connected to the sealing cover 8, and the handle 13 is located outside the receiving cavity 701. This arrangement allows the sealing cover 8 and the sealing ring 5 to be easily removed from the housing 7 via the handle 13, making the operation simple and convenient. In this embodiment, an exemplary solution is provided where two handles 13 are provided on the cover plate 801.

[0111] In an alternative embodiment, please refer to Figure 3 and Figure 4 The range hood also includes a light fixture 14, and the housing 7 has a mounting groove in which the light fixture 14 is embedded. The light fixture 14 provides illumination during cooking. In this embodiment, two light fixtures 14 are provided on the housing 7 as an example.

[0112] In an alternative embodiment, please refer to Figure 3 , Figure 4 and Figure 16 The housing 7 is provided with a cable outlet 7048. The range hood also includes a cable guard 15 that is sealed to the housing 7, and the cable outlet 7048 communicates with the inner cavity of the cable guard 15. Specifically, the cable outlet 7048 is located on the enclosure 704. The cable outlet 7048 and the cable guard 15 are used to pass through the wire harness 16 connected to the switch assembly 3. The cable guard 15 is sealed to the housing 7 to prevent oil and water from entering the receiving cavity 701 along the wire harness 16, ensuring a sealing effect. Preferably, the cable outlet 7048 is located at the top of the housing 7.

[0113] This embodiment also provides a control method for a range hood, which is executed by the aforementioned range hood control method.

[0114] Please refer to Figure 17 The control method for this range hood includes the following steps:

[0115] S100: Obtain the initial concentration of particulate matter in the environment where the range hood is located.

[0116] The initial concentration of particulate matter in the environment where the range hood is located can be detected by a particulate matter concentration sensor. The initial concentration is the concentration of particulate matter in the environment where the range hood is located when the stove is not turned on. Specifically, it can be the concentration at a certain point in time in the environment where the range hood is located when the stove is not turned on, or it can be the average concentration over a certain period of time. In other embodiments, the initial concentration can be manually set and pre-stored in the controller.

[0117] When the range hood is working, if the oil and water vapor in the smoke enter the receiving cavity 701, it will affect the normal operation of the switching component 3. The oil and water vapor in the smoke can be characterized by the concentration of particulate matter.

[0118] S200: Confirm range hood is on.

[0119] The range hood can be turned on manually or automatically through a control program. This embodiment exemplifies a scheme where the range hood is turned on automatically through a control program, as detailed below.

[0120] S300: Real-time acquisition of the actual concentration of particulate matter entering the range hood and calculation of the particulate matter concentration difference.

[0121] The particulate matter concentration difference is calculated as: actual concentration - initial concentration. When the stove is off, the actual concentration of particulate matter entering the range hood is essentially the same as the concentration in the kitchen environment and remains relatively stable, resulting in a particulate matter concentration difference of zero or very close to zero. However, when the stove is turned on, as cooking progresses, the concentration of particulate matter in the fumes entering the range hood increases significantly compared to the initial concentration. Therefore, the particulate matter concentration difference becomes larger. This difference can be used to determine the impact of oil and water vapor particles generated during cooking on the sealing performance of the sealing ring 5. Consequently, the required sealing capacity of the sealing ring 5, i.e., the required temperature, can be determined based on the magnitude of the particulate matter concentration difference.

[0122] S400: Adjust the temperature of sealing ring 5 based on the particulate matter concentration difference.

[0123] By using step S400, the temperature of the sealing ring 5 can be matched with the magnitude of the particulate matter concentration difference, thereby ensuring that the sealing ring 5 can still maintain reliable sealing performance under different concentrations of oil particles and water vapor particles, thus ensuring the reliable operation of the switch assembly 3.

[0124] Through steps S100 to S400, the sealing performance of the sealing ring 5 can be adapted to the actual concentration of particulate matter entering the range hood, thereby meeting the requirements for the sealing performance of the sealing ring 5 under the current working conditions, and ensuring reliable sealing performance of the sealing ring 5 under different cooking conditions.

[0125] In an alternative embodiment, please refer to Figure 18 In step S200, determining that the range hood is turned on includes the following steps:

[0126] S210: Obtain the initial temperature of the environment where the range hood is located.

[0127] The initial temperature of the environment in which the range hood is located can be detected by temperature sensor 9. The initial temperature is the temperature of the environment in which the range hood is located when the stove is not turned on. Specifically, it can be the temperature of the environment in which the range hood is located at a certain point in time when the stove is not turned on, or it can be the average temperature over a certain period of time. In other embodiments, the initial temperature can be manually set and pre-stored in the controller.

[0128] S220: Real-time acquisition of the actual temperature of the cooktop surface and calculation of the temperature difference.

[0129] The temperature difference is calculated as: Actual Temperature - Initial Temperature. When the stove is not in use, the actual temperature of the stove surface is the same as or very close to the initial temperature of the environment surrounding the range hood; that is, the temperature difference is zero or close to zero. However, when the stove is in use, the surface temperature rises, resulting in an actual temperature significantly higher than the initial temperature, and the temperature difference becomes significantly greater than zero. Therefore, the temperature difference can be used to determine whether the stove is in operation.

[0130] S230: Compare the temperature difference with the preset temperature.

[0131] If the temperature difference is not less than the preset temperature, then execute step S240; if the temperature difference is less than the preset temperature, then return to step S100.

[0132] It is important to note that the preset temperature can be set according to actual needs. For example, when a range hood is used in a home kitchen, the minimum actual temperature that the cooktop surface can reach under each cooking condition can be calculated, and the difference between the minimum value and the initial temperature can be used as the preset temperature.

[0133] S240: Turn on the range hood.

[0134] When the temperature difference is not less than the preset temperature, it indicates that the stove has been turned on and the range hood needs to be turned on to remove the fumes in time; when the temperature difference is less than the preset temperature, it indicates that the stove has not been turned on and the range hood should remain off.

[0135] Through steps S210 to S240, real-time monitoring of the surface temperature of the stove can be achieved, and when the temperature difference of the stove surface exceeds the preset temperature, the range hood will be automatically turned on.

[0136] In an alternative embodiment, please refer to Figure 18 In step S400, adjusting the temperature of the sealing ring 5 based on the particulate matter concentration difference includes the following steps:

[0137] S410: Compare the difference in particulate matter concentration with the preset particulate matter concentration.

[0138] When the particulate matter concentration difference is not less than the preset particulate matter concentration, execute S420; when the particulate matter concentration difference is less than the preset particulate matter concentration, execute S430.

[0139] It is important to note that the particulate matter concentration difference can be set according to actual needs. For example, when a range hood is used in a home kitchen, the minimum actual concentration of particulate matter drawn into the range hood can be calculated for each cooking condition that generates water vapor particles and / or oil particles. The minimum value can then be selected and the difference between it and the initial concentration can be used as the preset particulate matter concentration.

[0140] S420: Determine the target operating temperature of the sealing ring 5 based on the particulate matter concentration difference, and heat the sealing ring 5 to the target operating temperature.

[0141] When the particulate matter concentration difference is not less than the preset particulate matter concentration, it indicates that the sealing performance of the current sealing ring 5 may no longer meet the sealing requirements under the current concentration of water vapor particles and oil particles, so it is necessary to increase the temperature of the sealing ring 5.

[0142] The temperature of the sealing ring 5 can be heated to the target working temperature by collecting the current temperature of the sealing ring 5 and comparing the current temperature with the target working temperature. If the current temperature is lower than the target working temperature, the electric heating wire is turned on; if the current temperature is equal to or exceeds the target working temperature, the electric heating wire is turned off.

[0143] The controller has a pre-stored mapping relationship between particulate matter concentration difference and target operating temperature. The target operating temperature can be determined by the obtained particulate matter concentration difference and the mapping relationship. Then, the temperature of the sealing ring 5 is heated to the target operating temperature by the electric heating wire.

[0144] It should be noted that in this embodiment, the temperature of the sealing ring 5 is adjusted only when the range hood is turned on and the particulate matter concentration difference is not less than the preset particulate matter concentration. If the range hood is not turned on, even if the particulate matter concentration difference is not less than the preset particulate matter concentration, the temperature of the sealing ring 5 will not be adjusted, because when the range hood is not turned on, the smoke collection plate 4 will close the smoke inlet 101, and the switch assembly 3 located on the back of the smoke collection plate 4 can also be protected. If the range hood is turned on, but the particulate matter concentration difference is less than the preset particulate matter concentration, the initial volume of the sealing ring 5 is sufficient to meet the sealing requirements of the sealing ring 5 under the current particulate matter concentration.

[0145] S430: Stop heating the sealing ring 5.

[0146] When heating of the sealing ring 5 is stopped, its temperature will gradually decrease until it returns to its initial temperature. At this point, the initial volume of the sealing ring 5 is sufficient to meet the sealing requirements.

[0147] Through steps S410 to S430, the temperature of the sealing ring 5 can be matched with the actual concentration of particulate matter entering the range hood, that is, the sealing effect of the sealing ring 5 can match the current cooking conditions.

[0148] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A control method for a range hood, the range hood being installed above a cooktop, the range hood comprising a receiving cavity (701) for accommodating electronic components, and a sealing ring (5) for sealing the receiving cavity (701), characterized in that, The control methods for range hoods include: Obtain the initial concentration of particulate matter in the environment where the range hood is located; Make sure the range hood is turned on; The actual concentration of particulate matter entering the range hood is obtained in real time, and the particulate matter concentration difference is calculated, where the particulate matter concentration difference = actual concentration - initial concentration; The temperature of the sealing ring (5) is adjusted based on the particulate matter concentration difference.

2. The control method for a range hood according to claim 1, characterized in that, The process of determining that the range hood is turned on includes: Obtain the initial temperature of the environment where the range hood is located; The actual temperature of the stove surface is acquired in real time, and the temperature difference is calculated, where the temperature difference = actual temperature - initial temperature; Compare the temperature difference with the preset temperature; Turn on the range hood when the temperature difference is not less than the preset temperature.

3. The control method for a range hood according to claim 1, characterized in that, Adjusting the temperature of the sealing ring (5) based on the particulate matter concentration difference includes: Compare the difference in particulate matter concentration with the preset particulate matter concentration; When the particulate matter concentration difference is not less than the preset particulate matter concentration, the target working temperature of the sealing ring (5) is determined based on the particulate matter concentration difference, and the sealing ring (5) is heated to the target working temperature. When the particulate matter concentration difference is less than the preset particulate matter concentration, stop heating the sealing ring (5).

4. A range hood, characterized in that, The range hood is used to perform the control method of the range hood according to any one of claims 1-3. The range hood is disposed above the stove. The range hood includes a receiving cavity (701), a sealing ring (5) for sealing the receiving cavity (701), electronic components disposed in the receiving cavity (701), a temperature regulating component (12) for adjusting the temperature of the sealing ring (5), a temperature sensor (9) for detecting the temperature, and a particulate matter concentration sensor for detecting the particulate matter concentration.

5. The range hood according to claim 4, characterized in that, The range hood also includes: A smoke hood (1) is provided with a smoke inlet (101); The main unit (2) is fixedly connected to the smoke collection hood (1), and the inner cavity of the main unit (2) is connected to the inner cavity of the smoke collection hood (1); The fan is installed inside the main unit housing (2); The smoke collection plate (4) is rotatably connected to the smoke collection hood (1), and the smoke collection plate (4) is used to open or close the smoke inlet (101); A cover (7) is fixedly disposed on the smoke collecting plate (4). The cover (7) and the smoke collecting plate (4) surround the receiving cavity (701), and the receiving cavity (701) has an opening (702). A sealing cap (8) is used to close the opening (702), and a sealing ring (5) is disposed between the sealing cap (8) and the cover (7).

6. The range hood according to claim 5, characterized in that, The cover (7) is provided with a sealing groove (7044), and the sealing ring (5) is inserted into the sealing groove (7044).

7. The range hood according to claim 6, characterized in that, The cover (7) includes a first plate (7041) and a second plate (7042) arranged in parallel and spaced apart, and a third plate (7043) connected between the first plate (7041) and the second plate (7042), wherein the first plate (7041), the second plate (7042) and the third plate (7043) form the sealing groove (7044); The second plate (7042) is inserted into the sealing ring (5); and / or, the third plate (7043) is provided with a groove (7045) surrounding the opening (702), and the sealing ring (5) is provided with a protrusion (510) that is inserted into the groove (7045).

8. The range hood according to claim 7, characterized in that, Along the circumference of the opening (702), the sealing ring (5) is provided with a plurality of first latching protrusions (511) at intervals, and the first plate (7041) is provided with a plurality of first latching grooves (7046) at intervals, and the plurality of first latching protrusions (511) and the plurality of first latching grooves (7046) are interlocked one-to-one; and / or, along the circumference of the opening (702), the sealing ring (5) is provided with a plurality of second latching protrusions (512) at intervals, and the second plate (7042) is provided with a plurality of second latching grooves (7047) at intervals, and the plurality of second latching protrusions (512) and the plurality of second latching grooves (7047) are interlocked one-to-one.

9. The range hood according to claim 5, characterized in that, The sealing cap (8) is bonded to and / or inserted into the sealing ring (5).

10. The range hood according to claim 9, characterized in that, When the sealing cover (8) is inserted into the sealing ring (5), the sealing cover (8) includes a cover plate (801), a first insert (802) connected to the cover plate (801), and a second insert (803) connected to the cover plate (801). The second insert (803) is parallel to and spaced apart from the first insert (802). The sealing ring (5) is provided with a first slot (501) and a second slot (506) spaced apart. The first insert (802) is inserted into the first slot (501); the second insert (803) is inserted into the second slot (506), and the height of the second insert (803) protruding from the cover plate (801) is less than the height of the first insert (802) protruding from the cover plate (801).

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