Kitchen fan structure

Abstract

The kitchen fan structure comprises a fan outer box, the interior of the fan outer box is divided into a lower air inlet cavity and an upper air outlet cavity through a horizontal partition plate, a fan inner box is installed on the air inlet cavity, an exhaust fan is installed in the fan inner box, an output port of the exhaust fan extends out of the fan inner box, and an air outlet of the exhaust fan extends out of the fan inner box. The draught fan inner box comprises an inner box main plate, inner box side plates bent backwards are arranged on the edges of the four sides of the inner box main plate, the edges of the inner box side plates on the left side and the right side are fixed into the draught fan outer box, and air inlet holes are formed in the plate face of the inner box side plate on the lower side in a whole row. A receding opening is formed in the position, corresponding to an output opening of the exhaust fan, of the plate face of the inner box side plate on the upper side. According to the utility model, the internal structure is reasonable, the fan and the circuit board are separated through the arrangement of the inner and outer boxes, wrong contact of flat cables with the fan due to related disordered flat cables is avoided, and the inner box is provided with the ventilation heat dissipation mechanism, thereby facilitating heat dissipation of the circuit board and reducing potential safety hazards.

Description

Technical Field

[0001] The utility model relates to a kitchen fan structure. Background Art

[0002] At present, with the continuous improvement of the quality of life, people have changed their requirements for exhaust during the cooking process. Kitchen fans have basically entered every household. The existing kitchen fans are generally installed directly in the outer casing. The internal heat dissipation structure is relatively unreasonable. The capacitor PCB board and the power PCB board are easily burned due to overheating, and in severe cases, it may even cause safety problems. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a kitchen fan structure with a reasonable internal structure. The fan and the circuit board are separated by the setting of inner and outer boxes to avoid the wiring being accidentally contacted with the fan due to the disorder of related wiring. A ventilation and heat dissipation mechanism is provided on the inner box to facilitate the heat dissipation of the circuit board and reduce safety hazards.

[0004] The utility model is implemented by the following scheme: a kitchen fan structure: including a fan outer box, the fan outer box is divided into a lower air inlet chamber and an upper air outlet chamber by a horizontal partition, the air inlet chamber is installed with a fan inner box, an exhaust fan is installed in the fan inner box, the output port of the exhaust fan extends out of the fan inner box, and a connection port is opened on the partition corresponding to the output port of the exhaust fan.

[0005] Furthermore, the fan inner box includes an inner box main board, and the four side edges of the inner box main board are provided with backward bent inner box side panels, and the edges of the inner box side panels on the left and right sides are provided with outward mounting strips, which are screwed into the fan outer box, and the panel surface of the lower inner box side panel is provided with air inlet holes in a row, and the panel surface of the upper inner box side panel is provided with a yield port corresponding to the output port of the exhaust fan.

[0006] Furthermore, a radiator is installed in the fan inner box, and the radiator includes a radiator mounting plate, and a plurality of heat dissipation blades are arranged at intervals on one side of the radiator mounting plate. The radiator mounting plate is screwed to the middle of the inner box mainboard.

[0007] Furthermore, a plurality of clearance inlets are provided on the lower middle portion of the inner box mainboard, a plurality of capacitor plate connecting columns are provided on the periphery of the area surrounded by the clearance inlets on the front side panel of the inner box mainboard, and a plurality of power plate connecting columns are provided on the edge of the front side panel of the inner box mainboard, and the height of the power plate connecting columns is greater than the height of the capacitor plate connecting columns.

[0008] Furthermore, a driver mounting plate is connected to the upper portion of the front side panel of the inner box mainboard, and backward-bending wing plates are provided on the left and right sides of the driver mounting plate, and the bent wing plates are screwed to the outer wall of the inner box side plate on the same side.

[0009] Furthermore, the fan outer box includes an outer box back panel, the mounting strips are screwed to the inner side of the outer box back panel, outer box side panels bent forward are provided on the left and right sides of the outer box back panel, an air inlet plate is screwed between the lower edges of the two outer side panels, and an air outlet plate is screwed between the upper edges of the two outer side panels, the rear edges of the air inlet plate and the air outlet plate are respectively provided with bent edges corresponding to the outer box back, the bent edges abut against the inner side of the upper edge or the lower edge of the outer box back, and the upper and lower edges of the two outer box side panels are both provided with bent connecting edges inward, and the bent connecting edges are screwed to the inner edges of the air inlet plate or the air outlet plate.

[0010] Furthermore, L-shaped folding edges are provided on the front inner edges of the outer box side panels, air inlet panels and air outlet panels, and each L-shaped folding edge forms an inner turning edge. A cover plate is installed on the inner turning edge, and cover plate folding edges are provided around the cover plate corresponding to the inner turning edge, and the cover plate folding edges form an outer turning edge that cooperates with the inner turning edge.

[0011] Furthermore, the cover plate is divided into an upper cover plate and a lower cover plate, and an L-shaped flange of the lower cover plate is provided on the inner edge of the lower cover plate corresponding to one side of the upper cover plate, and an upper cover plate flange is provided on the inner edge of the upper cover plate corresponding to one side of the lower cover plate, and a yield slot is provided at the edge of the upper cover plate flange corresponding to the L-shaped flange of the lower cover plate, and plug-ins facing the L-shaped flange of the lower cover plate are provided on the left and right sides of the edge of the upper cover plate flange, and yield slots are provided on the plug-ins on both sides of the L-shaped flange of the lower cover plate, and a notch is provided on the L-shaped fold on the outer box side panel corresponding to the separation between the upper cover plate and the lower cover plate, and a screw plate screwed to the plug-in plate is provided at the notch on the outer box side panel.

[0012] Furthermore, at least one insert strip is provided on the inner edge of the cover fold on the side of the upper cover away from the lower cover, and a hole is provided on the L-shaped fold of the air outlet plate corresponding to the insert strip, and the cover fold on the side of the lower cover away from the upper cover is screwed to the L-shaped fold of the air inlet plate.

[0013] Furthermore, the air inlet plate is provided with a plurality of inlet holes, the lower plate body of the outer box side plate is provided with a plurality of side inlet holes, and the upper plate body of the outer box side plate is provided with a plurality of side outlet holes in the area corresponding to the air outlet cavity.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the internal structure is reasonable, and the fan and the circuit board are separated by the setting of the inner and outer boxes, which avoids the wiring from accidentally contacting the fan due to the disorder of the related wiring, and a ventilation and heat dissipation mechanism is provided on the inner box, which facilitates the heat dissipation of the circuit board and reduces safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the fan inner box structure of an embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the fan inner box structure of an embodiment of the utility model (after installing the PCB board);

[0018] Figure 4 This is a schematic diagram of the structure of a radiator according to an embodiment of the present utility model;

[0019] Figure 5 This is a schematic diagram of the fan outer box structure of an embodiment of the utility model;

[0020] Figure 6 This is a schematic diagram of the fan outer box structure of an embodiment of the utility model (with the cover plate, air inlet plate, and air outlet plate removed);

[0021] Figure 7 This is a schematic diagram of the air inlet plate structure of an embodiment of the utility model;

[0022] Figure 8 This is a schematic diagram of the air outlet plate structure of an embodiment of the utility model;

[0023] Figure 9 This is a schematic diagram of the cover structure of an embodiment of the utility model;

[0024] Figure 10 This is a schematic diagram of the upper cover structure of an embodiment of the utility model;

[0025] Figure 11 This is a schematic diagram of the lower cover structure of an embodiment of the utility model;

[0026] Figure 12 for Figure 10 Enlarged view of point A in the middle.

[0027] In the figure: 1- fan outer box; 2- partition; 3- lower air inlet cavity; 4- upper air outlet cavity; 5- fan inner box; 6- exhaust fan; 7- connection port; 8- inner box mainboard; 9- inner box side panel; 10- mounting strip; 11- air inlet; 12- cover fold; 13- clearance inlet; 14- capacitor board connection column; 15- capacitor PCB board; 16- power board connection column; 17- power PCB board; 18- silicone pad; 19- radiator; 20- radiator mounting plate; 21- heat dissipation blade; 22- opening; 23- insulation pad; 24 -Driver mounting plate; 25-Bent wing plate; 26-Driver PCB board; 27-Outer box back plate; 28-Outer box side plate; 29-Air inlet plate; 30-Air outlet plate; 31-Bent edge; 32-Bent connecting edge; 33-Inlet hole; 34-Side inlet hole; 35-Side outlet hole; 36-L-shaped folding edge; 37-Cover; 38-Upper cover; 39-Lower cover; 40-L-shaped flange of lower cover; 41-Upper cover flange; 42-Give-way slot; 43-Insert plate; 44-Give-way slot; 45-Screw plate; 46-Insert strip; 47-Insert hole. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0031] like Figure 1-12 As shown, a kitchen fan structure: includes a fan outer box 1, the fan outer box is divided into a lower air inlet chamber 3 and an upper air outlet chamber 4 by a horizontal partition 2, a fan inner box 5 is installed on the air inlet chamber, an exhaust fan 6 is installed in the fan inner box, the output port of the exhaust fan extends out of the fan inner box, and a connecting port 7 is opened on the partition corresponding to the output port of the exhaust fan. By installing the exhaust fan in the inner box, the exhaust fan is separated from the remaining circuit boards and cables, thereby reducing safety hazards, and the direct connection of the upper air outlet chamber to the fan further separates the exhaust area from the internal circuit board area, thereby further reducing safety hazards.

[0032] The fan inner box is provided with a plurality of inner box side panels 9 on the four side edges of the inner box main board, and outward mounting strips 10 are provided on the edges of the inner box side panels on the left and right sides. The mounting strips are screwed into the fan outer box, that is, the inner box main board and the four inner box side panels and the inner wall of the fan outer box are surrounded to form the fan inner box. The exhaust fan can be fixed on the inner wall of the fan inner box. The air inlet holes 11 are provided in a row on the plate surface of the lower inner box side panel to facilitate the air intake of the fan. A clearance port is provided on the plate surface of the upper inner box side panel corresponding to the output port of the exhaust fan to facilitate the outlet output of the fan and the clearance port is opposite to the connection port on the partition, so that the air discharged by the exhaust fan is directly discharged into the upper air outlet cavity. At the same time, the gas in the lower air inlet cavity can only be output through the inner box.

[0033] In this embodiment, in order to realize the installation of each circuit board bracket on the outer surface of the inner box mainboard and realize heat dissipation, a plurality of clearance inlets 13 are provided on the lower middle of the inner box mainboard body, and a plurality of capacitor board connecting columns 14 are provided on the outer periphery of the area surrounded by each clearance inlet on the front side panel of the inner box mainboard. The same capacitor PCB board 15 is commonly installed on the capacitor board connecting columns, and a plurality of power board connecting columns 16 are provided on the edge of the front side panel of the inner box mainboard. The same power PCB board 17 is commonly installed on the power board connecting columns. The height of the power board connecting column is greater than the height of the capacitor board connecting column, so that a two-layer structure is formed between the capacitor PCB board and the power PCB board, and the arrangement is reasonable. The setting of the clearance inlet is to correspond to the area where the capacitor PCB board is prone to heat generation. At the same time, in order to further realize heat dissipation, a silicone pad 18 is sandwiched between the bottom of the capacitor PCB board and the outer surface of the inner box mainboard to facilitate heat conduction, and avoidance holes are provided on the silicone pad corresponding to the clearance inlet.

[0034] In this embodiment, for the sake of reasonable design, a radiator 19 is installed in the inner box of the fan, and the radiator includes a radiator mounting plate 20. A number of heat dissipation blades 21 are arranged at intervals on one side of the radiator mounting plate. The radiator mounting plate is screwed to the middle of the inner surface of the inner box mainboard. An opening 22 is provided on the inner box mainboard corresponding to the radiator mounting plate. The opening corresponds to the heat-prone area of ​​the power PCB board to facilitate heat dissipation. At the same time, an insulating pad 23 is sandwiched between the capacitor PCB board and the power PCB board to reduce safety hazards.

[0035] In this embodiment, a driver mounting plate 24 is connected to the upper part of the front side plate of the inner box main board, and backward-bent bent wings 25 are provided on the left and right sides of the driver mounting plate. The bent wings are screwed to the outer wall of the inner box side plate on the same side. The driver mounting plate is located above the power PCB board, and a driver PCB board 26 is installed on the driver mounting plate. Since the whole is a steel plate structure, in order to avoid safety hazards caused by leakage, an insulating pad is also sandwiched between the driver PCB board and the driver mounting plate.

[0036] In this embodiment, the fan outer box includes an outer box back panel 27, and a plurality of hanging grooves can be provided on the four corners of the outer box back panel for hanging this device. The mounting strips are screwed to the inner side of the outer box back panel, and outer box side panels 28 bent forward are provided on the left and right sides of the outer box back panel. The partition is screwed to the outer box back panel and between the two outer box side panels. An air inlet plate 29 is screwed between the lower edges of the two outer side panels, and an air outlet plate 30 is screwed between the upper edges of the two outer side panels. The rear edges of the air inlet plate and the air outlet plate are both provided with bent edges 31 corresponding to the outer box quilt. The rear edges of the air inlet plate and the air outlet plate here are: the side where the air inlet plate and the air outlet plate are directly connected to the outer box quilt, and the bent edge abuts against the inner side of the upper edge or lower edge of the outer box quilt. The upper and lower edges of the two outer box side panels are both provided with bent connecting edges 32 inwardly. The side is abutted and screwed to the outer side of the bent connecting edge, that is, the bent connecting edge is screwed to the inner edge of the air inlet plate or the air outlet plate, and the bent connecting edge provides installation support for the air inlet plate and the air outlet plate. There is a gap between the bent connecting edge and the upper and lower edges of the outer box back, which is convenient for the insertion of the bent edges of the air inlet plate and the air outlet plate, and convenient for fixing the position on the structure. At the same time, for reasonable design, a number of inlet holes 33 are provided on the air inlet plate, a number of side inlet holes 34 are opened on the lower plate body of the outer box side panel, and a number of side outlet holes 35 are provided on the upper plate body of the outer box side panel corresponding to the air outlet cavity, so that the overall air path is: the air enters the lower air inlet cavity of the fan outer box through the inlet hole and the side inlet hole, and then enters the inner box through the air inlet hole, and then is output from the fan outlet to the give way of the partition, enters the upper air outlet cavity of the fan outer box, and is guided to the side outlet holes on both sides for output through the air outlet plate.

[0037] In this embodiment, in order to achieve the closure of the outer box, an L-shaped folding edge 36 is provided on the front inner edge of the outer box side panel, air inlet plate and air outlet plate, that is, the L-shaped folding edge is located on the inner side of the outer box side panel, air inlet plate and air outlet plate, and the end of the L-shaped folding edge is fixed to the inner edge of the outer box side panel, air inlet plate and air outlet plate, and the other end is outward. Each L-shaped folding edge forms an inner turning edge, and a cover plate 37 is installed on the inner turning edge. The closure of the outer box is achieved by the cover plate. The specific connection method is: the cover plate is provided with a cover plate corresponding to the inner turning edge around the four sides. The plate folding edge 12, the cover plate folding edge is surrounded by an outer flange mouth that cooperates with the inner flange mouth to achieve fixation. The specific cover plate structure is: the cover plate is divided into an upper cover plate 38 and a lower cover plate 39. The upper cover plate, the lower cover plate and the upper air outlet cavity and the lower air inlet cavity do not correspond to each other. The inner edge of the lower cover plate corresponding to the upper cover plate is provided with a lower cover plate L-shaped flange 40 bent into the fan outer box. The inner edge of the lower cover plate corresponding to the upper cover plate side is the side where the lower cover plate and the upper cover plate are connected. At the same time, the lower cover plate L-shaped flange is located inside the fan outer box The L-shaped section of the lower cover plate L-shaped flange has one end connected to the inner edge of the lower cover plate, and the other end faces the upper cover plate. The inner edge of the upper cover plate corresponding to the side of the lower cover plate is provided with an upper cover plate flange 41 bent toward the inner side of the fan outer box. The inner edge of the upper cover plate corresponding to the side of the lower cover plate, that is, the side where the upper cover plate and the lower cover plate are connected, is provided with a clearance slot 42 on the edge of the upper cover plate flange corresponding to the L-shaped flange of the lower cover plate, which facilitates the connection between the upper cover plate and the lower cover plate, and can also reduce the number of bolt connections between the upper cover plate and the lower cover plate and the fan outer box. The left and right sides of the edge of the upper cover plate flange are provided with plug plates 43 facing the L-shaped flange of the lower cover plate, and the two sides of the L-shaped flange of the lower cover plate are provided with clearance grooves 44 corresponding to the plug plates. The L-shaped fold on the outer box side panel is provided with a notch 45 corresponding to the separation between the upper cover plate and the lower cover plate, and the outer box side panel is provided with a screw plate 46 screwed to the plug plate at the notch, that is, the lower end plug plate of the upper cover plate is fixed to the screw plate by bolts, so as to realize the fixation of the lower end of the upper cover plate, and the upper end of the lower cover plate is limited by the L-shaped flange of the lower cover plate and the clearance slot.

[0038] In this embodiment, the inner edge of the cover fold on the side of the upper cover away from the lower cover is provided with at least one insert strip 46 facing the inside of the fan, and the L-shaped fold of the air outlet plate is provided with a hole 47 corresponding to the insert strip. The insert strip cooperates with the hole to achieve the limitation of the upper end of the upper cover, and the cover fold on the side of the lower cover away from the upper cover is screwed to the L-shaped fold of the air inlet plate to achieve the fixation of the lower end of the lower cover.

[0039] Unless otherwise stated, any numerical range disclosed for any technical solution disclosed in the present invention is a preferred numerical range. Those skilled in the art should understand that a preferred numerical range is merely a numerical range that provides a more significant or representative technical effect among a wide range of practicable values. Due to the large number of numerical values, it is impossible to enumerate them exhaustively. Therefore, only some numerical values ​​are disclosed in the present invention to illustrate the technical solution of the present invention. Furthermore, the numerical values ​​listed above should not be construed as limiting the scope of protection of the present invention.

[0040] If words such as "first" and "second" are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish between components. Unless otherwise stated, the above words have no special meaning.

[0041] If the present invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integral molding using a casting process) (except where it is obviously not possible to use an integrated molding process).

[0042] In addition, the orientations or positional relationships indicated by terms such as "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" used in any of the technical solutions disclosed in the above-mentioned utility model are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this patent, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this patent. Unless otherwise stated, the terms used to indicate shapes used in any of the technical solutions disclosed in the above-mentioned utility model include shapes that are approximate, similar, or close to them.

[0043] Any component provided by the present invention can be assembled from multiple separate components, or can be a separate component manufactured by an integral forming process.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. A kitchen fan structure, characterized by: It includes a fan outer box, which is divided into a lower air inlet chamber and an upper air outlet chamber by a horizontal partition. The air inlet chamber is installed with a fan inner box, and an exhaust fan is installed in the fan inner box. The output port of the exhaust fan extends out of the fan inner box, and a connection port is opened on the partition corresponding to the output port of the exhaust fan.

2. The kitchen fan structure according to claim 1, characterized in that; The fan inner box includes an inner box main board, and the four side edges of the inner box main board are provided with backward bent inner box side panels, and the edges of the inner box side panels on the left and right sides are provided with outward mounting strips, which are screwed into the fan outer box. Air inlet holes are provided in a row on the panel surface of the lower inner box side panel, and a clearance port is provided on the panel surface of the upper inner box side panel corresponding to the output port of the exhaust fan.

3. The kitchen fan structure according to claim 2, characterized in that; A radiator is installed in the fan inner box. The radiator includes a radiator mounting plate. A plurality of heat dissipation blades are arranged at intervals on one side of the radiator mounting plate. The radiator mounting plate is screwed to the middle of the inner box mainboard.

4. The kitchen fan structure according to claim 2, characterized in that; A plurality of clearance inlets are provided on the lower middle portion of the inner box mainboard, a plurality of capacitor plate connecting columns are provided on the periphery of the area surrounded by the clearance inlets on the front side panel of the inner box mainboard, and a plurality of power plate connecting columns are provided on the edge of the front side panel of the inner box mainboard, and the height of the power plate connecting columns is greater than the height of the capacitor plate connecting columns.

5. The kitchen fan structure according to claim 2, characterized in that; A driver mounting plate is connected to the upper portion of the front side plate of the inner box mainboard. Bent wing plates bent backward are provided on the left and right sides of the driver mounting plate. The bent wing plates are screwed to the outer wall of the inner box side plate on the same side.

6. The kitchen fan structure according to any one of claims 2-5, characterized in that; The fan outer box includes an outer box back panel, the mounting strips are screwed to the inner side of the outer box back panel, outer box side panels bent forward are provided on the left and right sides of the outer box back panel, an air inlet plate is screwed between the lower edges of the two outer side panels, and an air outlet plate is screwed between the upper edges of the two outer side panels, the rear edges of the air inlet plate and the air outlet plate are respectively provided with bent edges corresponding to the outer box back, the bent edges abut against the inner side of the upper edge or the lower edge of the outer box back, the upper and lower edges of the two outer box side panels are both provided with bent connecting edges inwardly, and the bent connecting edges are screwed to the inner edges of the air inlet plate or the air outlet plate.

7. The kitchen fan structure according to claim 6, characterized in that; The outer box side panels, air inlet panels and air outlet panels are provided with L-shaped folded edges on the front inner edges, and each L-shaped folded edge forms an inner turning edge. A cover plate is installed on the inner turning edge, and cover plate folded edges are provided around the cover plate corresponding to the inner turning edge, and the cover plate folded edges form an outer turning edge that cooperates with the inner turning edge.

8. The kitchen fan structure according to claim 7, characterized in that; The cover plate is divided into an upper cover plate and a lower cover plate, and an L-shaped flange of the lower cover plate is provided on the inner edge of the lower cover plate corresponding to one side of the upper cover plate, and an upper cover plate flange is provided on the inner edge of the upper cover plate corresponding to one side of the lower cover plate, and a yield slot is provided on the edge of the upper cover plate flange corresponding to the L-shaped flange of the lower cover plate, and plug-ins facing the L-shaped flange of the lower cover plate are provided on the left and right sides of the edge of the upper cover plate flange, and yield slots are provided on the plug-ins on both sides of the L-shaped flange of the lower cover plate, and a notch is provided on the L-shaped fold on the outer box side panel corresponding to the separation of the upper cover plate and the lower cover plate, and a screw plate screwed to the plug-in plate is provided at the notch on the outer box side panel.

9. The kitchen fan structure according to claim 8, characterized in that; At least one insert strip is provided on the inner edge of the cover fold on the side of the upper cover away from the lower cover, and a plug hole is provided on the L-shaped fold of the air outlet plate corresponding to the insert strip, and the cover fold on the side of the lower cover away from the upper cover is screwed to the L-shaped fold of the air inlet plate.

10. The kitchen fan structure according to claim 6, characterized in that: The air inlet plate is provided with a plurality of inlet holes, the lower plate body of the outer box side plate is provided with a plurality of side inlet holes, and the upper plate body of the outer box side plate is provided with a plurality of side outlet holes in the area corresponding to the air outlet cavity.

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