Air bellow, oil smoke suction and exhaust device and kitchen appliance

Abstract

The utility model belongs to the technical field of kitchenware, and discloses an air bellow, an oil smoke suction and exhaust device and a kitchen appliance, when the smoke exhaust direction of a fan unit needs to be replaced, only the fan unit needs to be detached, and the fan unit is installed in the air bellow after rotating around the axis of the fan unit by 180 degrees. According to the range hood, the first air outlet and the second air outlet are communicated, so that the air outlet of the fan is switched from being communicated with one of the first air outlet and the third air outlet to being communicated with the other one of the first air outlet and the third air outlet, smoke exhaust direction switching of the fan unit is achieved, and the air outlet of the fan is communicated with any one of the first air outlet and the second air outlet according to the positions where smoke exhaust pipelines can be arranged in kitchens of different users. And the smoke exhaust pipeline is always arranged at the rear part of the kitchen electric appliance without changing the arrangement of the smoke exhaust pipeline in the kitchen, so that the front space of the kitchen electric appliance is not occupied. The fan air inlet of the fan unit faces upwards all the time, it is guaranteed that the smoke exhaust effect is not affected by smoke exhaust direction replacement of the fan unit, the length of the air bellow in the front-back direction cannot be increased, and the space in the left-right direction is fully utilized.

Description

Technical Field

[0001] This utility model relates to the field of kitchenware technology, and in particular to a bellows, an oil fume extraction device, and a kitchen appliance. Background Technology

[0002] An integrated cooktop or range hood and gas stove is a kitchen appliance that combines multiple functions such as a range hood and a gas stove. It has advantages such as saving space, good smoke extraction effect, energy saving, low consumption and environmental protection.

[0003] Integrated cooktops and range hoods are equipped with a fume extraction system, including an air box and a fan unit installed inside the air box for fumes extraction. Under the suction of the fan unit, fumes enter the air box through the smoke inlet channel on the back panel of the integrated cooktop, and are then discharged into the common exhaust duct. In the prior art, fume extraction systems have vertical and horizontal configurations.

[0004] Regarding the horizontal placement of fume extraction devices, since the fan unit is mostly fixed inside the air box, the exhaust direction of the fume extraction device is also fixed, only achieving unidirectional exhaust. This limits the use of integrated stoves or combined range hoods and cooktops, and cannot meet the actual installation conditions of some users' homes. To address this, patent application number 202211398729.X proposes a method where the fan unit is detachably inserted into the air box, with an exhaust port on each of the opposite side panels of the air box. The two exhaust ports are coaxially arranged, and the fan unit's exhaust port is connected to either exhaust port by rotating the fan unit 180°. However, this design causes the fan unit's air inlet direction to rotate 180°. With the fan speed remaining constant, the air pressure at the fan unit's air inlet before and after the change in exhaust direction is significantly different, resulting in a substantial difference in the exhaust effect and affecting the extraction of fumes.

[0005] Another proposed solution in the prior art is to install the exhaust duct through the air box, with each end of the duct exiting the air box to form an exhaust port. A connecting hole is opened on the exhaust duct inside the air box, and the air outlet of the fan unit is connected to this connecting hole. A reversing baffle is installed inside the exhaust duct, and by changing the position of the reversing baffle, the connecting hole can be connected to either exhaust port. However, this structure requires the exhaust duct to be installed inside the air box, and the fan and the exhaust duct inside the air box are distributed radially along the fan. This undoubtedly increases the length of the air box along the distribution direction of the fan and the exhaust duct, thereby increasing the space occupied by the entire fume extraction device.

[0006] Therefore, there is an urgent need for an oil fume extraction device to solve the above problems. Utility Model Content

[0007] One of the technical problems solved by this utility model is to provide a wind box that can switch the exhaust direction of the fan unit to meet the installation conditions of exhaust pipes in different users' kitchens.

[0008] One of the technical problems solved by this utility model is to provide an oil fume extraction device that can switch the exhaust direction of the fan unit to meet the installation conditions of different users' kitchens, while ensuring that the exhaust effect is not affected by the change of the exhaust direction of the fan unit, and reducing the space occupied.

[0009] One of the technical problems solved by this utility model is to provide a kitchen appliance that can meet the installation conditions of different users' kitchens, while ensuring that the smoke exhaust effect is not affected by the change of the smoke exhaust direction of the fan unit, thereby improving user satisfaction and taking up little space.

[0010] The first technical problem mentioned above is solved by the following technical solution:

[0011] A bellows includes a bellows body, the bellows body includes two side plates arranged opposite each other in the left-right direction, each provided with a first air outlet and a second air outlet, the central axis of the first air outlet is located behind the central axis of the second air outlet;

[0012] The bellows also includes a side air duct structure, the side air duct structure and the second air outlet are located on the same side of the bellows body, the side air duct structure is provided with a third air outlet on the side plate opposite to the bellows body along the left and right direction, the central axis of the third air outlet is located behind the central axis of the second air outlet; the second air outlet is connected to the third air outlet.

[0013] Compared with the prior art, the bellows described in this utility model has the following beneficial effects:

[0014] When the aforementioned air box is used for kitchen appliances such as integrated range hoods or cooktops, the possible locations for the exhaust duct in different users' kitchens may be on the left or right side of the air box, both positioned towards the rear. By setting a side duct structure, the central axes of the first and third air outlets are both located behind the central axis of the second air outlet. This facilitates selecting which air outlet to connect to the exhaust duct based on the installation conditions of different users' kitchens. When the first air outlet is connected to the exhaust duct, the fan outlet of the fan unit is connected to the first air outlet; when the third air outlet is connected to the exhaust duct... Connect the fan outlet of the fan unit to the second outlet; simply remove the fan unit, rotate it 180° around its own axis, and then reinstall it in the air box. This allows the fan outlet to switch from being connected to one of the first and second outlets to being connected to the other, thus switching the exhaust direction of the fan unit. This allows the fan outlet to be connected to either the first or second outlet depending on the location of the exhaust duct in the kitchen of different users, without changing the layout of the exhaust duct in the kitchen. The exhaust duct is always located behind the kitchen appliances and will not occupy the front space of the kitchen appliances.

[0015] Furthermore, since the flue can be switched without flipping the fan unit, the orientation of the fan unit's air inlet will not change, ensuring that the fan unit's air inlet is set upwards and maintaining the stability of the smoke exhaust effect.

[0016] In one embodiment, the bellows body includes two bellows side plates that are spaced apart and arranged opposite each other in the left-right direction, the first air outlet is disposed on one of the bellows side plates, and the second air outlet is disposed on the other bellows side plate;

[0017] The side air duct structure is connected to the main body of the air box. The side air duct structure and the side plate of the air box where the second air outlet is provided form a side air duct chamber. The second air outlet is connected to the second air outlet through the side air duct chamber.

[0018] The second technical problem mentioned above is solved by the following technical solution:

[0019] The fume extraction device includes a fan unit and a wind box as described in any of the above embodiments. The fan unit is detachably installed inside the wind box body, and the fan inlet of the fan unit always faces upward.

[0020] When the first air outlet is used to connect to the smoke exhaust pipe, the fan outlet of the fan unit is connected to the first air outlet;

[0021] When the second air outlet is used to connect to the smoke exhaust duct, the fan outlet of the fan unit is connected to the third air outlet.

[0022] When it is necessary to change the exhaust direction of the fan unit, simply remove the fan unit, rotate it 180° around its own axis, and then reinstall it in the air box. This allows the fan outlet to switch from being connected to one of the first and second air outlets to being connected to the other, thus changing the exhaust direction of the fan unit. This allows the fan outlet to be connected to either the first or second air outlet depending on the location of the exhaust duct in the kitchen of different users, without changing the layout of the exhaust duct in the kitchen. The exhaust duct is always located behind the kitchen appliances and will not occupy the front space of the kitchen appliances.

[0023] Before and after changing the exhaust direction of the fan unit, the fan inlet of the fan unit always faces upward, ensuring that the exhaust effect is not affected by the change of the exhaust direction of the fan unit. Simply rotating the fan unit 180° around its own axis will not increase the length of the air box in the front-to-back direction, making full use of the space in the left-to-right direction.

[0024] In one embodiment, the fan unit is positioned horizontally inside the air box.

[0025] In one embodiment, the bellows body has an installation inlet / outlet at one end in the front-rear direction, and the fan unit is inserted into the bellows body through the installation inlet / outlet;

[0026] The main body of the air box or the fan unit is detachably connected to a first cover plate, which is used to block the installation inlet and outlet.

[0027] In one embodiment, the bellows body has a second cover plate disposed opposite to the installation inlet and outlet, and the volute of the fan unit is connected to the first cover plate and the second cover plate respectively at both ends in the front-rear direction by a plurality of first fasteners, and the volute is connected to the bellows base plate of the bellows body by a plurality of second fasteners.

[0028] In one embodiment, an annular boss is provided on the outlet end face of the fan outlet on the volute, and the annular boss is selectively inserted into either the first outlet or the third outlet along the left-right direction.

[0029] In one embodiment, each of the first cover plate and the second cover plate is provided with a mounting structure, and each of the mounting structures includes at least one side mounting portion.

[0030] The side mounting portion is provided with two sets of first threaded holes spaced apart along the left and right direction, and each cover plate corresponding to the mounting structure is provided with a set of first mounting holes that correspond one-to-one with the side mounting portion;

[0031] When the annular boss is inserted into the first air outlet, the first fastener passes through the first mounting hole and is threaded into a set of first threaded holes near the first air outlet along the left-right direction; when the annular boss is inserted into the second air outlet, the first fastener passes through the first mounting hole and is threaded into a set of first threaded holes near the second air outlet along the left-right direction.

[0032] In one embodiment, the bottom plate of the bellows is provided with a support structure that corresponds one-to-one with the side mounting portion. The support structure is provided with two sets of second threaded holes spaced apart along the left-right direction. Each side mounting portion corresponding to the support structure is provided with a set of second mounting holes.

[0033] When the annular boss is inserted into the first air outlet, the second fastener passes through the second mounting hole and is threaded into a set of second threaded holes near the first air outlet along the left-right direction; when the annular boss is inserted into the second air outlet, the second fastener passes through the second mounting hole and is threaded into a set of second threaded holes near the second air outlet along the left-right direction.

[0034] In one embodiment, the annular boss is fitted with a sealing element, which is sandwiched between the outlet end face of the fan outlet and the inner wall of the air box body.

[0035] The third technical problem mentioned above is solved by the following technical solution:

[0036] The kitchen appliance is an integrated stove or a stove-range appliance. The kitchen appliance includes a stove, a smoke collection device, and an oil fume extraction device as described in any of the above embodiments. The oil fume extraction device is located below the stove. The smoke collection device has a smoke inlet channel for collecting the oil fumes generated by the stove. The smoke inlet channel is connected to the air inlet of the fan unit.

[0037] Compared with the prior art, the kitchen appliance described in this utility model has the following beneficial effects:

[0038] This kitchen appliance includes the aforementioned fume extraction device. The exhaust duct is generally positioned fixed at the rear of the air box. By setting a side duct structure, the central axes of the first and third air outlets are both located behind the central axis of the second air outlet. This allows for selection of either the first or third air outlet to connect to the exhaust duct based on the installation conditions of different users' kitchens. When the first air outlet is connected to the exhaust duct, the fan outlet of the fan unit is connected to the first air outlet. When the third air outlet is connected to the exhaust duct, the fan outlet of the fan unit is connected to the second air outlet. Simply remove the fan unit, rotate it 180° around its own axis, and then reinstall it in the air box. This allows the fan outlet to switch from being connected to one of the first or second air outlets to being connected to the other, thus enabling the switching of the exhaust direction of the fan unit. This allows the fan outlet to be connected to either the first or second air outlet according to the installation conditions of different users' kitchens. Before and after changing the exhaust direction of the fan unit, the fan inlet of the fan unit always faces upward, ensuring that the exhaust effect is not affected by the change of the exhaust direction of the fan unit. The fan unit only needs to rotate 180° around its own axis, which does not increase the length of the air box in the front-to-back direction, making full use of the space in the left-to-right direction. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of the kitchen appliance provided in this embodiment of the utility model;

[0040] Figure 2 This is a cross-sectional view of the kitchen appliance provided in this embodiment of the utility model;

[0041] Figure 3 This is a disassembled diagram of the kitchen appliance provided in this embodiment of the utility model. Figure 1 ;

[0042] Figure 4 This is a schematic diagram showing the disassembly of the fan unit in the kitchen appliance provided in this embodiment after rotating 180° around its own axis. Figure 2 ;

[0043] Figure 5 This is a top view of a wind box with a side air duct structure provided in an embodiment of the present invention;

[0044] Figure 6 This is a schematic diagram of the structure of the air box with the side air duct structure provided in this embodiment of the utility model;

[0045] Figure 7 yes Figure 3 A magnified view of a portion of point I in the middle.

[0046] In the picture:

[0047] 1. Bellows; 11. Bellows body; 111. Bellows side plate; 112. First air outlet; 113. Second air outlet; 114. Bellows bottom plate; 115. Support boss; 12. Support structure; 13. Side mounting part; 14. Side air duct structure; 141. Third air outlet; 15. First cover plate;

[0048] 2. Fan unit; 21. Volute; 211. Fan outlet; 212. Annular boss; 22. Impeller; 23. Motor; 24. Seals;

[0049] 10. Side air duct chamber;

[0050] 100. Fume extraction device; 200. Smoke collection device; 201. Smoke inlet channel; 300. Cooking stove. Detailed Implementation

[0051] 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 present 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, not the entire structure.

[0052] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0054] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0055] The present invention provides a bellows, an oil fume extraction device including the bellows, and a kitchen appliance including the oil fume extraction device. The kitchen appliance can be a range hood and stove combo or an integrated stove. The following description will take a range hood and stove combo as an example to provide a detailed introduction to the kitchen appliance.

[0056] For ease of description and understanding, in the embodiments of this utility model, when the user faces the integrated range hood and cooktop, the user's left side is the left side, and the user's right side is the right side. The side of the integrated range hood and cooktop facing the user is the front side, and the side of the integrated range hood and cooktop facing away from the user is the rear side.

[0057] like Figure 1 and Figure 2 As shown, the integrated range hood and cooktop includes a cooktop 300, a smoke collection device 200, and a fume extraction device 100. The smoke collection device 200 has a smoke inlet channel 201 for collecting the fumes generated by the cooktop 300 during operation. The fume extraction device 100 is used to exhaust the fumes collected by the smoke collection device 200. The fume extraction device 100 is located below the cooktop 300. Fumes or steam are drawn into the smoke inlet channel 201 by the fume extraction device 100 and then discharged through the fume extraction device 100.

[0058] When the kitchen appliance is an integrated cooktop, if the integrated cooktop includes an oven and / or a disinfection cabinet, the fume extraction device 100 is located above the oven, disinfection cabinet, or similar structures. For example... Figure 3 As shown, the fume extraction device 100 includes a wind box 1 and a fan unit 2, wherein the fan unit 2 is horizontally positioned inside the wind box 1. This arrangement shortens the smoke extraction path, and compared to the vertically positioned fan unit in the prior art, the horizontally positioned fan unit 2 has a greater suction power, thus improving the fume extraction effect. It should be noted that "the fan unit 2 is horizontally positioned inside the wind box 1" means that when the fan unit 2 is placed inside the wind box 1, its axis is vertical.

[0059] like Figures 3 to 7 As shown, the bellows 1 includes a bellows body 11. The bellows body 11 has two side plates arranged opposite each other in the left-right direction, and a first air outlet 112 and a second air outlet 113 are respectively provided. The central axis of the first air outlet 112 is located behind the central axis of the second air outlet 113.

[0060] The bellows 1 also includes a side air duct structure 14. The side air duct structure 14 and the second air outlet 113 are located on the same side of the bellows body 11. A third air outlet 141 is provided on the side plate of the side air duct structure 14 facing away from the bellows body 11 in the left-right direction. The central axis of the third air outlet 141 is located behind the central axis of the second air outlet 113. The second air outlet 113 and the third air outlet 141 are connected.

[0061] When the above-mentioned air box is applied to the fume extraction device, the fan unit 2 is detachably installed inside the air box body 11. The fan inlet of the fan unit 2 always faces upward. When the first outlet 112 is used to connect to the exhaust pipe, the fan outlet 211 of the fan unit 2 is connected to the first outlet 112. When the second outlet 113 is used to connect to the exhaust pipe, the fan outlet 211 of the fan unit 2 is connected to the third outlet 141.

[0062] The exhaust ducts in different users' kitchens may be located on the left or right side of the air box 1, and are all located at the rear of the air box 1. By setting the side air duct structure 14, the central axis of the first air outlet 112 and the central axis of the third air outlet 141 are both set behind the central axis of the second air outlet 113. This makes it easy to select the first air outlet 112 or the third air outlet 141 to connect to the exhaust duct according to the installation conditions of different users' kitchens. When the first air outlet 112 is connected to the exhaust duct, the fan outlet 211 of the fan unit 2 is connected to the first air outlet 112. When the third air outlet 141 is connected to the exhaust duct, the fan outlet 211 of the fan unit 2 is connected to the second air outlet 113.

[0063] When it is necessary to change the exhaust direction of the fan unit 2, simply remove the fan unit 2, rotate it 180° around its own axis, and then reinstall it in the air box body 11. This allows the fan outlet 211 of the fan unit 2 to switch from being connected to one of the first outlet 112 and the second outlet 113 to being connected to the other. This achieves the switching of the exhaust direction of the fan unit 2. Thus, the fan outlet 211 can be connected to any one of the first outlet 112 or the second outlet 113 according to the location of the exhaust duct in different users' kitchens. There is no need to change the layout of the exhaust duct in the kitchen. The exhaust duct is always located at the rear of the kitchen appliances and will not occupy the front space of the kitchen appliances.

[0064] Furthermore, before and after the smoke exhaust direction of fan unit 2 is changed, fan unit 2 is always placed horizontally inside the air box body 11, and the air inlet of fan unit 2 always faces upward, ensuring that the smoke exhaust effect is not affected by the change of the smoke exhaust direction of fan unit 2. Simply rotating fan unit 2 180° around its own axis will not increase the length of air box 1 in the front-to-back direction, making full use of the space in the left-to-right direction.

[0065] Since the air inlet of the fan unit 2 always faces upwards, placing the fan unit 2 horizontally within the air box body 11 shortens the smoke extraction path. Compared to the vertically placed fan units in the prior art, the horizontally placed fan unit 2 has greater suction power, thus improving the oil fume emission effect. It should be noted that "the fan unit 2 is placed horizontally within the air box 1" means that when the fan unit 2 is placed within the air box 1, its axis is vertical.

[0066] In some embodiments, such as Figures 3 to 6 As shown, the bellows body 11 has two bellows side plates 111 that are spaced apart and arranged opposite each other in the left-right direction. The first air outlet 112 is disposed on one of the bellows side plates 111, and the second air outlet 113 is disposed on the other bellows side plate 111. The side air duct structure 14 is connected to the bellows body 11, so that the side air duct structure 14 and the bellows body 11 with the second air outlet 113 are arranged to form a side air duct chamber 10. The second air outlet 113 is connected to the third air outlet 141 through the side air duct chamber 10.

[0067] The side air duct structure 14 and the air box side plate 111 with the second air outlet 113 together form the side air duct chamber 10, so that the side air duct structure 14 and the air box body 11 share a single air box side plate 111. Compared with setting the side air duct chamber 10 independently on the side air duct structure 14, this reduces the number of parts in the fume extraction device 100, improves the integration of the fume extraction device 100, and saves material costs.

[0068] For example, the side air duct structure 14, the air box side plate 111, and the air box bottom plate 114 are welded and fixed. Specifically, the side air duct structure 14 is a box structure with openings on both adjacent sides. One opening of the side air duct structure 14 is blocked by the air box side plate 111, and the other opening of the side air duct structure 14 is blocked by the air box bottom plate 114. This simplifies the processing technology of the fume extraction device 100 and helps to improve the processing efficiency of the fume extraction device 100.

[0069] In some embodiments, such as Figure 3 and Figure 4 As shown, the main body 11 of the air box has an installation inlet / outlet at one end in the front-rear direction. The fan unit 2 can be inserted into the main body 11 of the air box through the installation inlet / outlet. The fan unit 2 is detachably connected to a first cover plate 15, which is used to block the installation inlet / outlet. For example, the first cover plate 15 is located at the front end of the air box 1.

[0070] When it is necessary to change the direction of smoke exhaust, the first cover plate 15 can be removed, the connection between the fan unit 2 and the air box body 11 can be disconnected, and then the fan unit 2 can be pulled out to change the direction of the fan unit 2. Then the fan unit 2 can be installed into the air box body 11 through the installation inlet and outlet.

[0071] In some other embodiments, the first cover plate 15 may be detachably connected to the bellows body 11.

[0072] In some embodiments, such as Figure 3 and Figure 4 As shown, the main body 11 of the wind box has a second cover plate that is arranged opposite to the installation inlet and outlet. The volute 21 of the fan unit 2 is connected to the first cover plate 15 and the second cover plate at both ends in the front and rear directions by a plurality of first fasteners. The volute 21 is connected to the bottom plate 114 of the wind box by a plurality of second fasteners.

[0073] The volute 21 is connected to the first cover plate 15 and the second cover plate by multiple first fasteners, and the volute 21 is connected to the bottom plate 114 of the wind box by multiple second fasteners, so that the fan unit 2 can be disassembled, and the fan unit 2 has good stability and is easy to disassemble and assemble.

[0074] When it is necessary to change the exhaust direction of the fan unit 2, simply remove the first fastener connecting the volute 21 and the first cover plate 15 and the second cover plate, as well as the second fastener connecting the volute 21 and the bottom plate of the air box 114, and pull out the fan unit 2 through the installation inlet and outlet. There is no need to disassemble the entire integrated stove. The fan unit 2 has a fast reversing speed. Moreover, it is convenient to pull out the fan unit 2 through the installation inlet and outlet for maintenance in the future, making maintenance convenient and quick.

[0075] In some embodiments, such as Figures 3 to 7 As shown, an annular boss 212 is provided on the outlet end face of the fan outlet 211. The annular boss 212 is selectively inserted into either the first outlet 112 or the second outlet 113 in the left-right direction.

[0076] After inserting the fan unit 2 into the air box 1 in the front-to-back direction, move the fan unit 2 in the left-to-right direction so that the annular boss 212 is inserted into the first air outlet 112 or the second air outlet 113. Then connect the volute 21 to the first cover plate 15 and the second cover plate through multiple first fasteners, and connect the volute 21 to the bottom plate 114 of the air box through multiple second fasteners. This will fix the fan unit 2 to the air box 1.

[0077] In some embodiments, such as Figure 3 and Figure 4 As shown, each of the first cover plate 15 and the second cover plate is provided with a mounting structure, and each mounting structure includes at least one side mounting portion 13. The side mounting portion 13 is provided with two sets of first threaded holes spaced apart in the left-right direction, and each cover plate corresponding to the mounting structure is provided with a set of first mounting holes corresponding one-to-one with the side mounting portion 13. For example, multiple side mounting portions 13 are arranged at intervals along the circumference of the volute 21.

[0078] When the annular boss 212 is inserted into the first air outlet 112, the first fasteners pass through the first mounting holes one by one and are then threaded into a set of first threaded holes along the left-right direction near the first air outlet 112. When the annular boss 212 is inserted into the second air outlet 113, the first fasteners pass through the first mounting holes one by one and are then threaded into a set of first threaded holes along the left-right direction near the second air outlet 113.

[0079] With this configuration, each side mounting part 13 only needs to be equipped with one set of first fasteners, reducing the number of first fasteners and the number of first mounting holes opened on the cover plate.

[0080] For example, the side mounting portion 13 is connected to the volute housing 21 by a third fastener. Each mounting structure includes two side mounting portions 13 spaced apart in the left-right direction, and the side mounting portions 13 are disposed on the outer peripheral wall of the volute housing 21. The number of first threaded holes in each group can be set according to actual needs, and the number of first mounting holes in each group is the same as the number of first threaded holes in the corresponding group.

[0081] In other embodiments, a set of first threaded holes may be provided on each side mounting portion 13, and two sets of first mounting holes corresponding to the side mounting portion 13 of the corresponding mounting structure may be provided on the cover plate, with the two sets of first mounting holes corresponding to the same side mounting portion 13 spaced apart in the left-right direction.

[0082] It should be noted that, in order to facilitate the connection of the side mounting portion 13 located at the rear end of the volute 21 to the air box base plate 114 via the second fastener, the second cover plate is removable. This means the second cover plate is only connected to the side mounting portion 13 at the rear end of the volute 21.

[0083] In some embodiments, such as Figure 3 and Figure 4 As shown, the bottom plate 114 of the air box is provided with a support structure 12 corresponding to the side mounting part 13. The support structure 12 is provided with two sets of second threaded holes spaced apart in the left and right direction. Each side mounting part 13 corresponding to the support structure 12 is provided with a set of second mounting holes.

[0084] When the annular boss 212 is inserted into the first air outlet 112, the second fasteners pass through the second mounting holes one by one and are threaded into a set of second threaded holes along the left-right direction near the first air outlet 112. When the annular boss 212 is inserted into the second air outlet 113, the second fasteners pass through the second mounting holes one by one and are threaded into a set of second threaded holes along the left-right direction near the second air outlet 113.

[0085] With this configuration, only one set of second fasteners needs to be provided on each side mounting part 13, reducing the number of second fasteners and the number of second mounting holes opened on the side mounting part 13.

[0086] For example, the support structure 12 protrudes from the inner bottom wall of the air box base plate 114. The support structure 12 is welded and fixed to the inner bottom wall of the air box base plate 114, eliminating the need for openings in the air box base plate 114 and avoiding oil fume leakage problems caused by openings. Figure 4 and Figure 5 As shown, the aforementioned support structure 12 includes a U-shaped structure with its opening facing downwards. The opposite side walls of the U-shaped structure are bent outwards to form two mounting ears. The mounting ears are welded and fixed to the inner bottom wall of the bellows base plate 114. The groove bottom plates of the U-shaped structure are spaced apart above the bellows base plate 114. The aforementioned second threaded holes are provided on the groove bottom wall of the U-shaped structure. The number of second threaded holes in each group can be set according to actual needs, and the number of second mounting holes in each group is the same as the number of second threaded holes in the corresponding group.

[0087] In other embodiments, two sets of second mounting holes may be provided on each side mounting portion 13, and a set of second threaded holes corresponding to the side mounting portion 13 of the corresponding mounting structure may be provided on the support structure 12. The two sets of first mounting holes corresponding to the same support structure 12 may be spaced apart in the left-right direction.

[0088] In some embodiments, such as Figure 3 and Figure 4 As shown, a support boss 115 protrudes from the bottom plate 114 of the air box, and the fan unit 2 is supported by the support boss 115. This arrangement helps to improve the stability of the fan unit 2.

[0089] For example, the support boss 115 extends in the front-to-back direction, and there are two support bosses 115, which are spaced apart in the left-to-right direction.

[0090] In some embodiments, such as Figure 3 and Figure 4 As shown, the outer bottom wall of the bellows base plate 114 is recessed upwards, forming the aforementioned support boss 115 on the inner bottom wall of the bellows base plate 114. Specifically, the support boss 115 is formed by stamping. This arrangement helps to improve the structural strength of the bellows base plate 114.

[0091] In some embodiments, such as Figure 7 As shown, a sealing element 24 is fitted over the annular boss 212, and the sealing element 24 is sandwiched between the outlet end face of the fan outlet 211 and the inner wall of the air box body 11. This arrangement can prevent air leakage from the fan outlet 211. For example, the sealing element 24 is fitted over the annular boss 212.

[0092] In some embodiments, such as Figure 2As shown, the fan unit 2 includes a motor 23, a volute 21, and an impeller 22 rotatably disposed within the volute 21. The output shaft of the motor 23 is connected to the impeller 22, and the motor 23 drives the impeller 22 to rotate. The fan inlet of the fan unit 2 is connected to the smoke inlet channel 201. The motor 23 drives the impeller 22 to rotate, so that the oil fumes are drawn into the smoke inlet channel 201, and then into the volute 21. The oil fumes in the volute 21 are discharged through the fan outlet 211 of the fan unit 2.

[0093] The power of motor 23 is transmitted to impeller 22 through the output shaft of motor 23. When the fan unit 2 is placed horizontally in the wind box 1, the output shaft of motor 23 is subjected to more uniform force and the axial movement of the output shaft of motor 23 is smaller, which can reduce the noise of fan unit 2 and extend the service life of motor 23.

[0094] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. 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 this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A bellows, comprising a bellows body (11), wherein the bellows body (11) comprises two side plates arranged opposite each other in a left-right direction, each having a first air outlet (112) and a second air outlet (113), wherein the central axis of the first air outlet (112) is located behind the central axis of the second air outlet (113); characterized in that, The bellows (1) also includes: A side air duct structure (14) is provided. The side air duct structure (14) and the second air outlet (113) are located on the same side of the air box body (11). A third air outlet (141) is provided on the side plate of the side air duct structure (14) facing away from the air box body (11) along the left and right direction. The central axis of the third air outlet (141) is located behind the central axis of the second air outlet (113). The second air outlet (113) is connected to the third air outlet (141).

2. The bellows according to claim 1, characterized in that, The bellows body (11) includes two bellows side plates (111) spaced apart and arranged opposite to each other in the left-right direction. The first air outlet (112) is disposed on one of the bellows side plates (111), and the second air outlet (113) is disposed on the other bellows side plate (111). The side air duct structure (14) is connected to the air box body (11). The side air duct structure (14) and the air box side plate (111) with the second air outlet (113) are arranged to form a side air duct chamber (10). The second air outlet (113) is connected to the second air outlet (113) through the side air duct chamber (10).

3. An oil fume extraction device, characterized in that, Includes a fan unit (2) and a wind box (1) as described in claim 1 or 2, wherein the fan unit (2) is detachably installed inside the wind box body (11), and the fan inlet of the fan unit (2) always faces upward; When the first air outlet (112) is used to connect to the smoke exhaust pipe, the fan outlet (211) of the fan unit (2) is connected to the first air outlet (112); When the second air outlet (113) is used to connect to the smoke exhaust pipe, the fan outlet (211) of the fan unit (2) is connected to the third air outlet (141).

4. The fume extraction device according to claim 3, characterized in that, The main body of the wind box (11) has an installation inlet and outlet at one end in the front-to-back direction, and the fan unit (2) is inserted into the main body of the wind box (11) through the installation inlet and outlet; The main body of the air box (11) or the fan unit (2) is detachably connected to a first cover plate (15), which is used to block the installation inlet and outlet.

5. The fume extraction device according to claim 4, characterized in that, The main body of the wind box (11) has a second cover plate that is disposed opposite to the installation inlet and outlet. The volute (21) of the fan unit (2) is connected to the first cover plate (15) and the second cover plate respectively at both ends in the front and rear directions by a plurality of first fasteners. The volute (21) is connected to the bottom plate (114) of the wind box main body (11) by a plurality of second fasteners.

6. The fume extraction device according to claim 5, characterized in that, The volute (21) has an annular boss (212) protruding from the outlet end face of the fan outlet (211). The annular boss (212) is selectively inserted into either the first outlet (112) or the third outlet (141) along the left-right direction.

7. The fume extraction device according to claim 6, characterized in that, Each of the first cover plate (15) and the second cover plate is provided with a mounting structure, and each of the mounting structures includes at least one side mounting part (13); The side mounting part (13) is provided with two sets of first threaded holes spaced apart along the left and right directions, and each of the mounting structures is provided with a set of first mounting holes corresponding to the side mounting part (13) on the cover plate. When the annular boss (212) is inserted into the first air outlet (112), the first fasteners pass through the first mounting holes one by one and are threaded into a set of first threaded holes close to the first air outlet (112) along the left and right direction; when the annular boss (212) is inserted into the second air outlet (113), the first fasteners pass through the first mounting holes one by one and are threaded into a set of first threaded holes close to the second air outlet (113) along the left and right direction.

8. The fume extraction device according to claim 7, characterized in that, The bottom plate (114) of the bellows is provided with a support structure (12) corresponding to the side mounting part (13). The support structure (12) is provided with two sets of second threaded holes spaced apart along the left and right direction. Each support structure (12) is provided with a set of second mounting holes corresponding to the side mounting part (13). When the annular boss (212) is inserted into the first air outlet (112), the second fastener passes through the second mounting hole and is threaded into a set of second threaded holes along the left-right direction near the first air outlet (112); when the annular boss (212) is inserted into the second air outlet (113), the second fastener passes through the second mounting hole and is threaded into a set of second threaded holes along the left-right direction near the second air outlet (113).

9. The fume extraction device according to claim 6, characterized in that, The annular boss (212) is fitted with a sealing element (24), which is sandwiched between the outlet end face of the fan outlet (211) and the inner wall of the air box body (11).

10. A kitchen appliance, characterized in that, The kitchen appliance is an integrated stove or a stove-range appliance. The kitchen appliance includes a stove (300), a smoke collection device (200), and an oil fume extraction device (100) as described in any one of claims 3 to 9. The oil fume extraction device (100) is located below the stove (300). The smoke collection device (200) has a smoke inlet channel (201) for collecting the oil fumes generated by the stove (300) during operation. The smoke inlet channel (201) is connected to the fan inlet of the fan unit (2).

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