Main box of a range hood

Abstract

The present invention discloses a main case of a range hood, comprising a first shell and a second shell. The first and second shells are connected, forming a ventilation chamber for the main case. The surface of the first shell facing outward forms a decorative surface of the main case. The interior of the first shell is provided with a connecting portion that mates with the second shell. The second shell is mounted on the connecting portion and does not protrude beyond at least one side edge of the first shell. The main case of the range hood described in the present invention utilizes the first shell as both a panel surrounding the ventilation chamber and a decorative cover for the exterior. This structure is simple, installation is convenient, and cost-effective. It enhances the overall effectiveness and aesthetics of the main case while also reducing material costs.

Description

Technical Field

[0001] The invention belongs to the technical field of household appliances, and in particular relates to a main box of a range hood. Background Art

[0002] Range hoods are essential appliances in the kitchen, used to absorb and exhaust cooking fumes. Users are increasingly concerned about the appearance of the range hood. For European-style range hoods, decorative covers have become an essential decorative component to shield the main body of the range hood and other internal structures. Decorative covers are generally made of stainless steel. According to existing cabinet standards, the length of the decorative cover sheet after unfolding is about 1 to 1.1 meters, accounting for a large part of the total cost of the machine. Figure 1 As shown, to ensure overall strength, the European-style range hood main box has several profiled panels, including a top panel 7, rear panel 5, and front panel 4. These panels, along with the visible rivets or screws used for fastening, and a maintenance cover 6 mounted on the front panel 4, are constructed with a profiled structure. If these panels were directly exposed to the user, they would be visually unpleasant. Therefore, most manufacturers opt to conceal the internal structure with a stainless steel decorative cover 8. While existing decorative cover solutions address user perception issues, they also impose significant costs on manufacturers.

[0003] Chinese patent application number CN201820007193.7 discloses a range hood decorative cover, comprising a main body and a chassis back panel; the main body is mounted on the chassis back panel; the main body comprises an upper wall, a front wall and two side walls; a square opening is provided on the upper wall for installing a smoke exhaust pipe; a one-way limiter is provided on the edge of the side wall close to the chassis back panel; a special-shaped groove is provided at a position of the chassis back panel corresponding to the one-way limiter; the main body is mounted on the periphery of the chassis on the upper part of the smoke hood top panel, and is clamped with the special-shaped groove by the one-way limiter, so that the chassis back panel, the smoke hood top panel and the main body surround to form the decorative cover.

[0004] Chinese patent application number CN201520886510.3 discloses a decorative cover for a range hood and a range hood, wherein the decorative cover of the range hood includes a cover body, and the end of the cover body that contacts the range hood body is provided with a buckle portion, which is used to buckle with a buckle portion on the body to limit the position.

[0005] Although the above-mentioned prior art proposes technical solutions for range hoods and decorative covers, the decorative cover and the range hood are still separate structures. Although it provides convenience in installation, the overall structure is still too complicated, the cost remains high, and the disassembly process during maintenance is also cumbersome.

[0006] In view of this, the present invention is proposed. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a main box of a range hood that can overcome the above problems or at least partially solve the above problems.

[0008] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0009] A main box of a range hood, comprising

[0010] a first shell and a second shell;

[0011] The first shell and the second shell are connected to form a ventilation chamber of the main box;

[0012] The surface of the first shell facing outward forms the decorative surface of the main box.

[0013] Wherein, a connecting portion is provided on the inner side of the first shell, which is connected to the second shell;

[0014] In one embodiment, the second shell is mounted on the connecting portion and does not protrude from at least one side edge of the first shell.

[0015] Furthermore, the first shell includes a front plate and two side plates connected to the front plate;

[0016] The second housing includes a top plate and a rear plate;

[0017] The top plate does not protrude beyond the upper edges of the front plate and the two side plates;

[0018] The rear panel does not protrude beyond the rear edges of the two side panels;

[0019] Specifically, the first shell is surrounded by the front panel and the side panel, serving as both a enclosure for the ventilation chamber and an exterior decorative cover. It has a simple structure and is easy to install, which saves costs and improves the overall effect and aesthetics of the main box. While saving costs, it also makes maintenance more convenient. The range hood or the ventilation chamber can be repaired by disassembling the second shell.

[0020] Furthermore, the connecting portion includes at least a first connecting unit and a second connecting unit;

[0021] The first connecting unit is close to one side edge of the top of the side plate and is arranged on the inner side of the side plate in the transverse direction, and the top plate is installed on the first connecting unit;

[0022] The second connecting unit is located near an edge of one side of the rear portion of the side panel and is vertically arranged on the inner side of the side panel, and the rear panel is mounted on the second connecting unit;

[0023] Specifically, by arranging the first connection unit and the second connection unit in at least two directions inside the first shell, a stable connection between the first shell and the second shell is achieved.

[0024] Furthermore, at least one of the first connecting unit and the second connecting unit is an L-shaped structure;

[0025] The L-shaped structure includes a first supporting edge and a first connecting edge;

[0026] The first supporting edge is connected to the side panel;

[0027] The first connecting edge is connected to the top plate or the rear plate, and the connection is achieved by screws or rivets during use, which enables faster installation and disassembly during use.

[0028] In one embodiment, the first connecting unit and the second connecting unit are respectively sheet metal bent parts;

[0029] Furthermore, the first connecting edge and the side panel are an integral structure;

[0030] Furthermore, the first connecting edge is formed by bending the edge of the side plate inward in the opposite direction.

[0031] In addition, both the first connecting unit and the second connecting unit are L-shaped structures;

[0032] Furthermore, the top plate is fixedly connected to the first connecting edge, and the upper surface of the top plate is flush with the upper edge of the side plate;

[0033] Furthermore, the rear panel is fixedly connected to the first connecting edge, and the rear surface of the rear panel is flush with the rear edge of the side panel.

[0034] At the same time, the first connecting unit is an L-shaped structure;

[0035] The L-shaped structure includes a first supporting edge and a first connecting edge, and the top plate is mounted on the first connecting edge;

[0036] The second connecting unit is a U-shaped structure;

[0037] The U-shaped structure includes a second supporting edge and two second connecting edges connected to the second supporting edge, forming a limiting slide structure for the rear plate to be inserted from top to bottom;

[0038] The second supporting edge is connected to the side panel, or the second connecting unit and the side panel are an integral structure.

[0039] Furthermore, the top plate is fixedly connected to the first connecting edge, and the upper surface of the top plate is flush with the upper edge of the side plate;

[0040] In one embodiment, the second connection unit is formed by bending the edge of the side panel inward in a reverse direction.

[0041] Furthermore, the first connecting unit is a U-shaped structure;

[0042] The U-shaped structure includes a second supporting edge and two second connecting edges connected to the second supporting edge, forming a limiting slide structure for the top plate to be inserted from the back to the front;

[0043] The second supporting edges are respectively connected to the side panels, or the second connecting units and the side panels are an integral structure;

[0044] The second connecting unit is an L-shaped structure;

[0045] The L-shaped structure includes a first supporting edge and a first connecting edge, and the rear plate is mounted on the first connecting edge;

[0046] In one embodiment, the first connection unit is formed by bending the edge of the side panel inward in a reverse direction.

[0047] Furthermore, the rear panel is fixedly connected to the first connecting edge, and the rear surface of the rear panel is flush with the rear edge of the side panel.

[0048] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: the main box of the range hood described in the present invention uses the first shell as both a partition of the ventilation chamber and an appearance decorative cover, has a simple structure and is easy to install, saves costs, improves the overall effect and aesthetics of the main box, and reduces material costs.

[0049] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The accompanying drawings, as part of this disclosure, are intended to provide a further understanding of the disclosure. The exemplary embodiments of the disclosure and their descriptions are intended to explain the disclosure and do not constitute undue limitations thereon. Obviously, the drawings described below are merely examples, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0051] In the attached figure:

[0052] Figure 1 This is a schematic diagram of an explosion of a range hood in the prior art;

[0053] Figure 2 is a schematic diagram of the main box of the range hood of the present invention;

[0054] Figure 3 This is an exploded schematic diagram of the range hood main box of the present invention;

[0055] Figure 4 is a schematic diagram of the first shell of the present invention;

[0056] Figure 5 is a schematic diagram of the second shell of the present invention;

[0057] Figure 6 is a first schematic diagram of the connection portion of the present invention;

[0058] Figure 7 This is a second schematic diagram of the connecting portion of the present invention.

[0059] In the figure: 1. First shell; 101. Front panel; 102. Side panel; 2. Second shell; 201. Top panel; 202. Rear panel; 3. Connecting portion; 301. First connecting unit; 302. Second connecting unit; 303. First supporting edge; 304. First connecting edge; 305. Second supporting edge; 306. Second connecting edge; 307. Third connecting unit; 4. Front panel; 5. Rear panel; 6. Maintenance cover; 7. Top panel; 8. Decorative cover.

[0060] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0062] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0063] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0064] Figure 1 The explosion diagram of the range hood in the prior art is shown as follows: Figure 1 It can be seen that in the prior art, the range hood includes a top panel 7, a rear panel 5 and a front panel 4, rivets or screws exposed when fixed, and a maintenance cover 6 installed on the front panel 4 and other structures. If directly exposed to the user's field of vision, the sensory experience is extremely poor. Most manufacturers will choose to use a stainless steel decorative cover 8 to cover the internal structure.

[0065] Figure 2 and Figure 3 This is a schematic diagram of the main box of the range hood of the present invention and an explosion of the main box. It can be seen from the figure that the present application includes a first shell 1 and a second shell 2. The first shell 1 and the second shell 2 are connected to form the main box. The interior of the first shell 1 and the interior of the second shell 2 are connected to form a ventilation chamber of the main box; the surface of the first shell 1 facing outward forms a decorative surface of the main box. Specifically, the present invention uses the first shell 1 as both a panel of the ventilation chamber and an exterior decorative cover. The surface of the first shell 1 facing outward serves as a decorative surface, and the interiors of the first shell 1 and the second shell 2 form the ventilation chamber of the main box.

[0066] Furthermore, a connecting portion 3 is provided on the first shell 1, and the first shell 1 and the second shell 2 are connected through the connecting portion 3. As can be seen from the accompanying drawings, the connecting portion 3 is provided with a threaded hole or a through hole, and the second shell 2 is provided with a through hole, and the first shell 1 and the second shell 2 are connected by screws or rivets.

[0067] Figure 4This is a schematic diagram of the first shell 1 of the present invention. As can be seen from the figure, the first shell 1 includes a front panel 101 and a side panel 102. The front panel 101 is configured as the front wall of the main box, and the two side panels 102 are configured as the side walls of the main box. The connecting portion 3 is arranged inside the first shell 1. Specifically, the connecting portion 3 includes a first connecting unit 301 and a second connecting unit 302. The first connecting unit 301 is close to the edge of one side of the top of the side panel 102 and is arranged on the inner side of the side panel 102 along the horizontal direction. The second connecting unit 302 is close to the edge of one side of the rear part of the side panel 102 and is arranged on the inner side of the side panel 102 along the vertical direction. Specifically, the first connecting unit 301 and the second connecting unit 302 are sheet metal bending parts.

[0068] Figure 5 This is a schematic diagram of the second shell 2 of the present invention. As can be seen from the figure, the second shell 2 includes a top plate 201 and a back plate 202. The top plate 201 is configured as the top wall of the main box, and the back plate 202 is configured as the back wall of the main box. Through holes are provided on the top plate 201 and the back plate 202 corresponding to the first connecting unit 301 and the second connecting unit 302, for realizing a fixed connection between the second shell 2 and the first shell 1. In addition, in actual applications, the top plate 201 and the back plate 202 can be set as required to be a one-piece bent sheet metal, or can be two separate structures, which are separately matched with the first shell 1.

[0069] The main box of the range hood described in the present invention is specifically applied as follows.

[0070] In a specific embodiment, Figure 2 and Figure 3 As shown, the main box of a range hood described in this embodiment includes a first shell 1 and a second shell 2 that are connected to each other to form the main box; the first shell 1 and the second shell 2 are connected to form a ventilation chamber of the main box; the surface of the first shell 1 facing outward forms a decorative surface of the main box. The present invention uses the first shell 1 as both a panel of the ventilation chamber and an exterior decorative cover, which has a simple structure and is easy to install, saves costs, improves the overall effect and aesthetics of the main box, and reduces material costs; the maintenance cover needed to be removed during original maintenance, but now only the top plate 201 or the back plate 202 needs to be removed during maintenance, eliminating the original maintenance cover parts and reducing material costs.

[0071] In a specific embodiment, Figure 2 and Figure 3As shown, in the main box of a range hood described in this embodiment, a connecting portion 3 is provided on the inner side of the first shell 1, which is connected to the second shell 2; the second shell 2 is installed on the connecting portion 3 and at least does not protrude from one side edge of the first shell 1.

[0072] The first housing 1 includes a front panel 101 and two side panels 102 connected to the front panel 101; the second housing 2 includes a top panel 201 and a rear panel 202; after the second housing 2 is engaged with the connecting portion 3, the top panel 201 does not protrude from the upper edges of the front panel 101 and the two side panels 102; and the rear panel 202 does not protrude from the rear edges of the two side panels 102. The connecting portion 3 includes at least a first connecting unit 301 and a second connecting unit 302; the first connecting unit 301 is located near one edge of the top of the side panel 102 and is laterally disposed on the inner side of the side panel 102, with the top panel 201 mounted on the first connecting unit 301; the second connecting unit 302 is located near one edge of the rear of the side panel 102 and is vertically disposed on the inner side of the side panel 102, with the rear panel 202 mounted on the second connecting unit 302.

[0073] Specifically, the first shell 1 is formed by the front panel 101 and the side panel 102, which serves as both a partition of the ventilation chamber and an appearance decorative cover. It has a simple structure and is easy to install, which saves costs and improves the overall effect and aesthetics of the main box. It eliminates structures such as partitions and maintenance covers, which saves costs and makes maintenance more convenient. The range hood or the ventilation chamber can be repaired by disassembling the second shell 2.

[0074] As the preferred technical solution of this embodiment, the front panel 101 and the side panel 102 are an integrally formed structure. By bending and integrally forming, the production efficiency of the first shell 1 is improved. During use, the strength of the first shell 1 is also well guaranteed. Furthermore, the front panel 101 and the side panel 102 are integrally formed by bending sheet metal.

[0075] As the preferred technical solution of this embodiment, the top plate 201 and the back plate 202 are an integrally formed structure. By bending and integrally forming, the production efficiency of the second shell 2 is improved. During use, the strength of the second shell 2 is also well guaranteed. Furthermore, the top plate 201 and the back plate 202 are sheet metal bent and integrally formed.

[0076] As a preferred technical solution of this embodiment, the top plate 201 and the rear plate 202 are separately provided. Configuring the top plate 201 and the rear plate 202 as a split structure facilitates installation and transportation of the second shell 2.

[0077] As a preferred technical solution of this embodiment, the first connecting unit 301 is arranged on the inner side of the side panel 102, and a third connecting unit 307 is also arranged on the inner side of the front panel 101. The way in which the third connecting unit 307 is arranged on the inner side of the front panel 101 is the same as the way in which the first connecting unit 301 is arranged on the inner side of the side panel 102. Preferably, the installation surface of the third connecting unit 307 and the first connecting unit 301 are in the same plane.

[0078] In a specific embodiment, Figures 2 to 6 As shown, in the main box of a range hood described in this embodiment, the first connecting unit 301 and the second connecting unit 302 are both L-shaped structures; the L-shaped structure includes a first supporting edge 303 and a first connecting edge 304; the first supporting edge 303 is connected to the side panel 102; the top panel 201 and the rear panel 202 are both installed on the first connecting edge 304 and fixed by screws or rivets.

[0079] In which, through holes corresponding to the first connecting unit 301 and the second connecting unit 302 are provided on the top plate 201 and the back plate 202, and the second connecting unit 302 is connected to the back plate 202 by screws or rivets. The first shell 1 and the back plate 202 can be quickly installed and disassembled by screws or rivets.

[0080] As a preferred technical solution of this embodiment, the first connecting unit 301 and the second connecting unit 302 are respectively sheet metal bent parts.

[0081] Furthermore, the top panel 201 is fixedly connected to the first connecting edge 304, and the upper surface of the top panel 201 is flush with the upper edge of the side panel 102; the rear panel 202 is fixedly connected to the first connecting edge 304, and the rear surface of the rear panel 202 is flush with the rear edge of the side panel 102. Specifically, compared with the prior art, the present invention uses the first shell 1 as both a panel for the ventilation chamber and as an exterior decorative cover, which has a simple structure and is easy to install, saves costs, and improves the overall effect and aesthetics of the main box.

[0082] In a specific embodiment, Figures 2 to 5 、 Figure 7As shown, in the main box of a range hood described in this embodiment, the first connecting unit 301 is an L-shaped structure; the L-shaped structure includes a first supporting edge 303 and a first connecting edge 304, and the top plate 201 is installed on the first connecting edge 304; the second connecting unit 302 is a U-shaped structure; the U-shaped structure includes a second supporting edge 305, and two second connecting edges 306 connected to the second supporting edge 305, forming a limiting slide structure for the rear plate 202 to be inserted from top to bottom; the second supporting edge 305 is connected to the side plate 102, or the second connecting unit 302 and the side plate 102 are an integral structure; the top plate 201 is fixedly connected to the first connecting edge 304, and the upper surface of the top plate 201 is flush with the upper edge of the side plate 102.

[0083] Wherein, by setting the connection relationship between the second shell 2 and the connecting portion 3 such that the top plate 201 is connected by screws or rivets and the rear plate 202 is connected by sliding, rapid installation and disassembly are achieved.

[0084] Furthermore, through holes corresponding to the first connecting unit 301 and the second connecting unit 302 are provided on the top plate 201 and the back plate 202, and the second connecting unit 302 is connected to the back plate 202 by screws or rivets. The first shell 1 and the back plate 202 can be quickly installed and disassembled by screws or rivets.

[0085] As a preferred technical solution of this embodiment, the first connecting unit 301 and the second connecting unit 302 are respectively sheet metal bending parts, wherein the second connecting unit 302 is formed by bending the edge of the side panel 102 inward in the opposite direction.

[0086] Furthermore, the top plate 201 is fixedly connected to the first connecting edge 304, and the upper surface of the top plate 201 is flush with the upper edge of the side plate 102. Specifically, compared with the prior art, the present invention uses the first shell 1 as both a surrounding panel of the ventilation chamber and as an appearance decorative cover, which has a simple structure and is easy to install, saves costs, and improves the overall effect and aesthetics of the main box.

[0087] In a specific embodiment, Figures 2 to 5 、 Figure 7As shown, in the main box of a range hood described in this embodiment, the first connecting unit 301 is a U-shaped structure; the U-shaped structure includes a second supporting edge 305, and two second connecting edges 306 connected to the second supporting edge 305, forming a limiting slide structure for the top plate 201 to be inserted from the back to the front; the second connecting unit 302 is an L-shaped structure; the L-shaped structure includes a first supporting edge 303 and a first connecting edge 304, and the rear plate 202 is installed on the first connecting edge 304; the second supporting edge 305 is connected to the side plate 102, or the second connecting unit 302 and the side plate 102 are an integral structure; the rear plate 202 and the first connecting edge 304 are connected by screws or rivets.

[0088] Wherein, by setting the connection relationship between the second shell 2 and the connecting portion 3 such that the rear plate 202 is connected by screws or rivets and the top plate 201 is connected by sliding, rapid installation and disassembly are achieved.

[0089] Furthermore, through holes corresponding to the first connecting unit 301 and the second connecting unit 302 are provided on the top plate 201 and the back plate 202, and the second connecting unit 302 is connected to the back plate 202 by screws or rivets. The first shell 1 and the back plate 202 can be quickly installed and disassembled by screws or rivets.

[0090] As a preferred technical solution of this embodiment, the first connecting unit 301 and the second connecting unit 302 are respectively sheet metal bending parts, wherein the first connecting unit 301 is formed by bending the edge of the side panel 102 inward in the opposite direction.

[0091] Furthermore, the rear panel 202 is fixedly connected to the first connecting edge 304, and the rear surface of the rear panel 202 is flush with the rear edge of the side panel 102. Specifically, compared with the prior art, the present invention uses the first shell 1 as both a surrounding panel of the ventilation chamber and an exterior decorative cover, which has a simple structure and is easy to install, saves costs, and improves the overall effect and aesthetics of the main box.

[0092] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0093] Furthermore, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are also intended to fall within the scope of protection of the present invention and form different embodiments. For example, in the above embodiments, those skilled in the art will be able to use them in combination based on the known technical solutions and the technical problems to be solved by this application.

[0094] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A main box of a range hood, characterized by: include A first shell (1) and a second shell (2); The first shell (1) and the second shell (2) are connected, and a ventilation chamber of the main box is formed inside; The surface of the first shell (1) facing outward forms the decorative surface of the main box; The first housing (1) comprises a front plate (101) and two side plates (102) connected to the front plate (101); The second shell (2) comprises a top plate (201) and a rear plate (202), wherein the top plate (201) and the rear plate (202) are an integrally formed structure; A connecting portion (3) is provided on the inner side of the first shell (1) and is connected to the second shell (2); The connecting portion (3) comprises at least a first connecting unit (301) and a second connecting unit (302); The first connecting unit (301) is close to a top side edge of the side plate (102) and is arranged on the inner side of the side plate (102) in the transverse direction, and the top plate (201) is mounted on the first connecting unit (301); The second connecting unit (302) is located near one side edge of the rear portion of the side panel (102) and is vertically arranged on the inner side of the side panel (102); the rear panel (202) is mounted on the second connecting unit (302); and the rear panel (202) does not protrude from the rear edges of the two side panels (102); The first connecting unit (301) is an L-shaped structure; The L-shaped structure comprises a first supporting edge (303) and a first connecting edge (304), and the top plate (201) is mounted on the first connecting edge (304); The second connecting unit (302) is a U-shaped structure; The U-shaped structure includes a second supporting edge (305) and two second connecting edges (306) connected to the second supporting edge (305), forming a limiting slide structure for the rear plate (202) to be inserted from top to bottom; The second supporting edge (305) is connected to the side panel (102), or the second connecting unit (302) and the side panel (102) are an integral structure.

2. The main box of the range hood according to claim 1, characterized in that: The top plate (201) does not protrude from the upper edges of the front plate (101) and the two side plates (102).

3. The main box of the range hood according to claim 1, characterized in that: The first connecting unit (301) and the second connecting unit (302) are respectively sheet metal bent parts.

4. The main box of the range hood according to claim 1, characterized in that: The first connecting edge (304) and the side panel (102) are an integral structure.

5. The main box of the range hood according to claim 1, characterized in that: The first connecting edge (304) is formed by bending the edge of the side panel (102) inward in the opposite direction.

6. The main box of the range hood according to claim 1, characterized in that: The second connection unit (302) is formed by bending the edge of the side plate (102) inward in a reverse direction.

7. The main box of the range hood according to claim 2, characterized in that: The top plate (201) is fixedly connected to the first connecting edge (304), and the upper surface of the top plate (201) is flush with the upper edge of the side plate (102).

8. The main box of the range hood according to claim 1, characterized in that: The first connecting unit (301) is a U-shaped structure; The U-shaped structure includes a second supporting edge (305) and two second connecting edges (306) connected to the second supporting edge (305), forming a limiting slide structure for the top plate (201) to be inserted from the back to the front; The second supporting edge (305) is connected to the side plate (102), or the second connecting unit (302) and the side plate (102) are an integral structure; The second connecting unit (302) is an L-shaped structure; The L-shaped structure comprises a first supporting edge (303) and a first connecting edge (304), and the rear plate (202) is mounted on the first connecting edge (304).

9. The main box of the range hood according to claim 8, characterized in that: The first connecting unit (301) is formed by bending the edge of the side plate (102) inward in a reverse direction.

10. The main box of the range hood according to claim 8, characterized in that: The rear panel (202) is fixedly connected to the first connecting edge (304), and the rear surface of the rear panel (202) is flush with the rear edge of the side panel (102).

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