Shell assembly of fresh air equipment and fresh air equipment

By adopting an integrated molding structure and rotating mechanism in the housing components of the fresh air equipment, the problems of excessive components and complex assembly of the existing fresh air equipment are solved, and a simpler appearance and higher structural strength are achieved.

CN222480678UActive Publication Date: 2025-02-14MIDEA GRP WUHAN HEATING & VENTILATING EQUIP CO LTD +1
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Patent Information

Application Number
CN202421187682.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-27
Publication Date
2025-02-14
Estimated Expiration
2034-05-27

AI Technical Summary

Technical Problem

The existing fresh air equipment has too many shell components, resulting in large appearance gaps in the product and complex assembly process.

Method used

The design of the cover and the inspection cover is an integrated molded structure to reduce the number of parts, simplify the assembly process, and facilitate connection and separation between the cover and the inspection cover through the rotating mechanism.

Benefits of technology

It effectively reduces the appearance gap, improves the simplicity and aesthetics of the entire machine's appearance, and simplifies the disassembly and assembly process and improves structural strength.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of air conditioning, and provides a shell assembly of fresh air equipment and the fresh air equipment. The shell assembly of the fresh air equipment comprises a shell, a cover body and an access cover. A containing cavity and an assembling opening communicating with the containing cavity are formed in the shell. The cover body and the access cover jointly shield the assembly opening, and the cover body and the access cover are of an integrally-formed structure. According to the shell assembly of the fresh air equipment and the fresh air equipment, the cover body and the access cover are arranged to be of the integrally-formed structure, the number of parts of the access cover and the cover body can be reduced, redundant installation parts needed for connection of the access cover and the cover body are reduced, and the disassembly and assembly process is simplified. The number of gaps between the cover body and the access cover is reduced, the possibility that the gaps between the access cover and the cover body are not uniform is reduced, and the appearance of the whole machine is more concise. And meanwhile, the structural strength of the cover body and the access cover can be improved by adopting the integrally-formed structure.
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Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to a housing component of a fresh air device and a fresh air device. Background Art

[0002] This section is intended to provide a background or context for the embodiments of the present application. No description herein is admitted to be prior art by virtue of its inclusion in this section.

[0003] Fresh air equipment is used to replace indoor air and outdoor air, thereby improving the indoor environment. The housing assembly of the fresh air equipment is provided with a shell, a top cover and an inspection cover. In the related art, the inspection cover and the top cover are assembled with many parts, and there are many gaps in the product appearance. Utility Model Content

[0004] In view of this, the present application hopes to provide a housing assembly of a fresh air device and a fresh air device, which can simplify the parts of the housing assembly and reduce the gaps in the product appearance. The housing assembly of the fresh air device includes a shell, a cover body and an inspection cover. The shell is formed with a receiving cavity and an assembly port connected to the receiving cavity; the cover body and the inspection cover jointly cover the assembly port, and the cover body and the inspection cover are both integrally formed structures.

[0005] In some embodiments, the housing assembly includes a rotating mechanism located in the accommodating cavity, and the cover body and the inspection cover are rotatably connected via the rotating mechanism.

[0006] In some embodiments, the rotating mechanism includes a base and a rotating member. The base is arranged on the inner surface of the cover body; the rotating member includes a fixing portion and a transition portion, the fixing portion is arranged on the inner surface of the inspection cover, one end of the transition portion is rotatably connected to the base, and the other end of the transition portion is fixedly connected to the fixing portion.

[0007] In some embodiments, a portion of the adapter portion located between the base and the fixing portion protrudes in a direction away from the cover body.

[0008] In some embodiments, the cover body includes a plate body, a portion of the outer surface of the plate body is recessed to form an avoidance groove, the inspection cover includes a main board, the plate body and the main board jointly cover the assembly port, and the main board extends to the avoidance groove.

[0009] In some embodiments, the inspection cover includes a flange, and the flange is bent from the main board toward the avoidance groove.

[0010] In some embodiments, the housing assembly includes a first seal disposed on the inner surface of the main board, and the inspection cover includes a surround extending from one end of the flange around the periphery of the main board to the other end of the flange, and the surround surrounds the outer periphery of the first seal.

[0011] In some embodiments, the shell assembly includes a first seal, the avoidance groove includes a first side wall, a second side wall and a third side wall, the first side wall extends inward from the plate body, the third side wall is spaced apart on the side of the first side wall close to the main board, the second side wall connects the inward end of the first side wall and the inward end of the third side wall, the first seal is arranged on the inner surface of the main board, and a portion of the first seal abuts the outward end of the third side wall.

[0012] In some embodiments, the shell assembly includes a second seal disposed on the inner surface of the plate body, and the cover body includes a folded edge, which extends from one end of the avoidance groove around the periphery of the plate body to the other end of the avoidance groove, and the folded edge surrounds the outer periphery of the second seal.

[0013] An embodiment of the present application also provides a fresh air device, characterized in that it includes a shell assembly as described in any one of the above items.

[0014] The housing assembly of the fresh air device provided in the embodiment of the present application can reduce the number of parts of the inspection cover and the cover body by setting the cover body and the inspection cover to be an integrally formed structure, reduce the number of redundant installation parts required to connect the inspection cover and the cover body, and simplify the disassembly and assembly process. Reduce the number of gaps between the cover body and the inspection cover, reduce the possibility of uneven gaps between the inspection cover and the cover body, and make the appearance of the whole machine more concise. At the same time, the use of an integrally formed structure can increase the structural strength of the cover body and the inspection cover. The fresh air device provided in the embodiment of the present application has the same beneficial effects as the above-mentioned fan assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a fresh air device in one embodiment of the present application;

[0016] Figure 2 for Figure 1 A structural schematic diagram of the fresh air device from another perspective;

[0017] Figure 3 for Figure 1 A schematic cross-sectional structure diagram of the fresh air equipment shown;

[0018] Figure 4 This is a schematic diagram of the structure of the cover body and the inspection cover in one embodiment of the present application;

[0019] Figure 5 for Figure 4 A schematic structural diagram of the cover body and the inspection cover from another perspective;

[0020] Figure 6 It is a structural schematic diagram of a cover body, an inspection cover, a first sealing member and a second sealing member in one embodiment of the present application;

[0021] Figure 7 for Figure 6 A schematic cross-sectional structure diagram of the cover body, the inspection cover, the first sealing member and the second sealing member;

[0022] Figure 8 for Figure 7 A magnified schematic diagram of point A;

[0023] Fig. 9 It is a structural schematic diagram of a rotating mechanism in an embodiment of the present application;

[0024] Fig.10 This is a schematic diagram of the structure of the inspection cover in one embodiment of the present application;

[0025] Fig.11 It is a schematic structural diagram of the inspection cover and the first sealing member in one embodiment of the present application;

[0026] Fig.12 This is a schematic structural diagram of a cover body and a second sealing member in an embodiment of the present application;

[0027] Fig.13 for Fig.12 An enlarged schematic diagram of point B;

[0028] Fig.14 for Fig.12 A schematic structural diagram of the cover body and the second sealing member from another perspective;

[0029] Fig.15 A schematic structural diagram of a fresh air device in another embodiment of the present application.

[0030] Description of Reference Numerals

[0031] 100, shell assembly; 100a, fixing hole; 10, shell; 10a, accommodating chamber; 20, cover body; 21, plate body; 211, avoidance groove; 2111, first side wall; 2112, second side wall; 2113, third side wall; 212, folded edge; 30, inspection cover; 31, main board; 32, flange; 33, surrounding edge; 40, rotating mechanism; 40a, mounting hole; 41, base; 42, rotating part; 421, fixing part; 43, fastener; 422, adapter; 51, first sealing member; 52, second sealing member; 200, fresh air equipment; 210, heat exchange core; 11, first side panel; 11a, return air outlet; 11b, supply air outlet; 12, second side panel; 12a, fresh air outlet; 12b, exhaust outlet. DETAILED DESCRIPTION

[0032] In the absence of conflict, the embodiments and technical features in the embodiments of the present application may be combined with each other, and the detailed descriptions in the specific implementation methods should be understood as explanations of the purpose of the present application and should not be regarded as improper limitations on the present application.

[0033] It should be noted that in the embodiments of the present application, the orientations or positional relationships such as "inside", "outside", and "first direction" in the embodiments of the present application are based on the orientations or positional relationships shown in the drawings. It should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, 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, and therefore cannot be understood as a limitation on the present application. The present application is further described in detail below in conjunction with the drawings and specific embodiments.

[0034] In the related art, the inspection cover 30 is assembled with multiple top covers. For example, when the number of top covers reaches two or three or more, many parts are used, and there are gaps between the inspection cover 30 and the multiple top covers, resulting in many gaps in the product appearance.

[0035] In view of this, please refer to Figure 1-Figure 4 The embodiment of the present application provides a housing assembly 100 of a fresh air device 200, comprising a housing 10, a cover 20 and an inspection cover 30. The housing 10 is formed with a receiving cavity 10a and an assembly port communicating with the receiving cavity 10a. The cover 20 and the inspection cover 30 jointly shield the assembly port, and both the cover 20 and the inspection cover 30 are integrally formed structures.

[0036] The fresh air device 200 is an effective air purification device that can circulate indoor air. On the one hand, it discharges the indoor polluted air to the outside, and on the other hand, it inputs the outdoor fresh air into the room to adjust the indoor air quality.

[0037] The fresh air device 200 includes a housing assembly 100, which is used to provide an installation space for structures such as a heat exchange core 210 and a fan. The shape of the housing assembly 100 can be similar to a rectangular parallelepiped. The accommodating cavity 10a is used to install structures such as a fan and a heat exchange core 210.

[0038] The fresh air device 200 provided in the embodiment of the present application can be installed on the ceiling or the ceiling panel. The ceiling panel can separate the indoor space into the ceiling space and the living space. Users carry out their daily lives in the living space, and the ceiling space is not only used to beautify the interior decoration, but also to install other equipment. In one embodiment, the fresh air device 200 is arranged in the ceiling space. In this way, the fresh air device 200 is hidden in the ceiling space, avoiding the user from directly observing the entire fresh air device 200, thereby improving the visual aesthetics. It is understandable that the indoor space includes but is not limited to balconies, bathrooms, kitchens, etc., and can be a large-sized house, a small-sized house, or other types of production or living environments.

[0039] In some embodiments, the inspection cover 30 can be rotatably connected to the cover body 20. The inspection cover 30 can rotate relative to the cover body 20 to form a closed state and an open state. When the structure in the accommodating cavity 10a needs to be inspected or installed, the inspection cover 30 rotates to the open state, exposing part of the assembly opening and the accommodating cavity 10a corresponding to the exposed part of the assembly opening; when the inspection or installation is completed, the inspection cover 30 rotates to the closed state, and the inspection cover 30 and the cover body 20 jointly cover the assembly opening and the accommodating cavity 10a. The accommodating cavity 10a is used to provide a accommodating space for components such as a fan and a heat exchange core 210.

[0040] In this embodiment, by setting the cover body 20 and the inspection cover 30 to be an integrally formed structure, the number of parts of the inspection cover 30 and the cover body 20 can be reduced, and the redundant installation parts required for connecting the inspection cover 30 and the cover body 20 can be reduced, simplifying the disassembly and assembly process. The number of gaps between the cover body 20 and the inspection cover 30 is reduced, and the possibility of uneven gaps between the inspection cover 30 and the cover body 20 is reduced, making the appearance of the whole machine more concise. At the same time, the use of an integrally formed structure can increase the structural strength of the cover body 20 and the inspection cover 30.

[0041] For example, in some embodiments, please refer to Figure 1-Figure 4 , the gap between the cover body 20 and the inspection cover 30 extends in a straight line.

[0042] For some examples, see Figure 5-Figure 8 The housing assembly 100 includes a rotating mechanism 40 located in the accommodating cavity 10 a , and the cover body 20 and the inspection cover 30 are rotatably connected via the rotating mechanism 40 .

[0043] In this embodiment, the rotating mechanism 40 is used to rotate the inspection cover 30 relative to the cover body 20, so that the inspection cover 30 can switch between an open state and a closed state. In the closed state, the outer surface of the inspection cover 30 can be flush with the outer surface of the cover body 20, and can jointly shield the accommodating cavity 10a; in the open state, the outer surface of the inspection cover 30 can form an angle with the outer surface of the cover body 20, so that the inspection cover 30 is opened to expose the interior of the accommodating cavity 10a, and the internal components of the accommodating cavity 10a can be installed or tested. The rotating mechanism 40 is arranged in the accommodating cavity 10a. When the inspection cover 30 is in the closed state, the rotating mechanism 40 is located inside the housing assembly 100. Compared with the rotating mechanism 40 being arranged on the outer surfaces of the inspection cover 30 and the cover body 20, the product appearance can be simplified.

[0044] For some examples, see Figure 5-Figure 9 The rotating mechanism 40 includes a base 41 and a rotating member 42. The base 41 is disposed on the inner surface of the cover body 20; the rotating member 42 includes a fixed portion 421 and a transition portion 422. The fixed portion 421 is disposed on the inner surface of the inspection cover 30, one end of the transition portion 422 is rotatably connected to the base 41, and the other end of the transition portion 422 is fixedly connected to the fixed portion 421. In this way, the inspection cover 30 is driven to rotate relative to the base 41 by the rotating member 42, so that the inspection cover 30 rotates relative to the cover body 20.

[0045] For example, see Figure 8-Figure 11 The cover body 20 and the inspection cover 30 are both provided with a fixing hole 100a, the base 41 and the rotating member 42 are both provided with an installation hole 40a, and the rotating mechanism 40 also includes a fastener 43, which is passed through the fixing hole 100a and the installation hole 40a to fix the base 41 to the inner surface of the cover body 20 and the fixing part 421 to the inner surface of the inspection cover 30.

[0046] Exemplarily, the fasteners 43 include but are not limited to screws, bolts, or blind rivets.

[0047] For some examples, see Figure 6-Figure 9 The portion of the adapter 422 between the base 41 and the fixing portion 421 protrudes in a direction away from the cover body 20. The avoidance space defined by the adapter 422 can be used to avoid the portion of the cover body 20 close to the inspection cover 30, so that when the adapter 422 rotates, the possibility of the connection portion between the top cover and the inspection cover 30 interfering with the rotation of the adapter 422 can be reduced.

[0048] Exemplarily, the adapter 422 includes a straight edge and an arcuate edge. One end of the straight edge is rotatably connected to the base 41, and the arcuate edge connects the other end of the straight edge and the fixing portion 421. The straight edge and the arcuate edge together define an avoidance space.

[0049] It can be understood that when a seal is provided at the connecting portion between the straight edge and the arc-shaped edge in the direction of the accommodating cavity 10a, the movement trajectory of the arc-shaped edge is not interfered by the seal.

[0050] For some examples, see Figure 6-Figure 8 The cover body 20 includes a plate body 21, and a portion of the outer surface of the plate body 21 is recessed to form an avoidance groove 211. The inspection cover 30 includes a main board 31. The plate body 21 and the main board 31 jointly cover the assembly port, and the main board 31 extends to the avoidance groove 211. When the inspection cover 30 is rotatably connected to the cover body 20, the avoidance groove 211 can provide movement space for the main board 31 to prevent the plate body 21 from interfering with the rotation of the main board 31. The avoidance groove 211 can shield the components in the accommodating cavity 10a to prevent the components from being exposed and affecting the appearance of the fresh air device 200. The main board 31 extends to the avoidance groove 211, and the main board 31 can cover part of the avoidance groove 211, reduce the distance of the gap between the main board 31 and the plate body 21, and enhance the aesthetics. It can be understood that the main board 31 is spaced from the plate body 21, that is, the main board 31 does not contact the plate body 21, which can reduce the possibility of interference with the rotation of the inspection cover 30.

[0051] For some examples, see Figure 6-Figure 8 The inspection cover 30 includes a flange 32, which is bent from the main board 31 toward the avoidance groove 211. When the inner surface of the main board 31 is provided with a first sealing member 51, the flange 32 can shield the first sealing member 51, and the flange 32 can also reduce burrs on the edge of the main board 31, thereby reducing the risk of burrs scratching the body of the operator.

[0052] It is understandable that when the inspection cover 30 is in a closed state, the flange 32 does not contact the avoidance groove 211 , and the minimum distance between the end of the flange 32 facing the accommodating cavity 10 a and the avoidance groove 211 is sufficient to avoid the rotation of the inspection cover 30 .

[0053] For some examples, see Figure 10-11 The housing assembly 100 includes a first sealing member 51 disposed on the inner surface of the main board 31 , and the inspection cover 30 includes a peripheral edge 33 , which extends from one end of the flange 32 around the periphery of the main board 31 to the other end of the flange 32 , and the peripheral edge 33 surrounds the outer periphery of the first sealing member 51 .

[0054] The first sealing member 51 is used to seal the inspection cover 30 to reduce the possibility of air leakage inside the fresh air device 200 affecting the fresh air effect, and to reduce adverse effects such as noise generated by vibration of the fresh air device 200.

[0055] The surrounding edge 33 can limit the inspection cover 30 to prevent the inspection cover 30 from moving, and at the same time can form a accommodating space for the first sealing member 51 to prevent the first sealing member 51 from being exposed and affecting the appearance of the fresh air device 200.

[0056] Exemplarily, the surrounding edge 33 is interference fit with the shell 10 to improve the sealing and heat preservation effects.

[0057] Exemplarily, the first sealing member 51 is configured as a sponge, which can absorb noise while sealing the inspection cover 30 .

[0058] For some examples, see Figure 8 , Figure 10-11 The housing assembly 100 includes a first sealing member 51, and the avoidance groove 211 includes a first side wall 2111, a second side wall 2112 and a third side wall 2113. The first side wall 2111 extends inward from the plate body 21, and the third side wall 2113 is spaced apart on a side of the first side wall 2111 close to the main board 31. The second side wall 2112 connects the inward end of the first side wall 2111 and the inward end of the third side wall 2113. The first sealing member 51 is arranged on the inner surface of the main board 31, and a portion of the first sealing member 51 abuts against the outward end of the third side wall 2113.

[0059] The third side wall 2113 can limit the first seal 51 to prevent the first seal 51 from moving. The outward end of the third side wall 2113 abuts against the first seal 51, the thickness of the outward end of the third side wall 2113 is relatively small, the contact area between the outward end of the third side wall 2113 and the first seal 51 is relatively small, and the outward end of the third side wall 2113 and the first seal 51 are approximately in line contact, which reduces the risk of the inspection cover 30 being lifted outward and the probability of the outer surface of the inspection cover 30 and the outer surface of the cover body 20 forming steps.

[0060] Exemplarily, the cover body 20 may be a sheet metal structure. The housing 10 may be a sheet metal structure. The inspection cover 30 may be a sheet metal structure. The sheet metal structure is relatively light, has good plasticity and ductility, and is easy to process. The cover body 20 is set as a sheet metal structure, which can reduce the thickness of the third side wall 2113, facilitate strengthening the stability of the connection between the third side wall 2113 and the first sealing member 51, improve the sealing effect, and further reduce the risk of the inspection cover 30 being pushed outward.

[0061] Exemplarily, the third side wall 2113 is a sheet metal structure with a thickness of 0.8 mm.

[0062] For some examples, see Figure 12-14 The housing assembly 100 includes a second sealing member 52 disposed on the inner surface of the plate body 21 , and the cover body 20 includes a folded edge 212 , which extends from one end of the avoidance groove 211 around the periphery of the plate body 21 to the other end of the avoidance groove 211 , and the folded edge 212 surrounds the outer periphery of the second sealing member 52 .

[0063] The second sealing member 52 is used to seal the cover body 20 to reduce the possibility of air leakage inside the fresh air device 200 affecting the air intake effect, and to reduce adverse effects such as vibration of the fresh air device 200 and noise.

[0064] The folded edge 212 can limit the cover body 20 to prevent the cover body 20 from moving, and at the same time can form a accommodating space for the second sealing member 52 to prevent the second sealing member 52 from being exposed and affecting the appearance of the fresh air device 200.

[0065] Exemplarily, the folded edge 212 is interference fit with the housing 10 to improve the sealing and heat preservation effect. Exemplarily, the second sealing member 52 is configured as a sponge, which can absorb noise while sealing the cover 20.

[0066] Illustratively, the second sealing member 52 may include a piece of sponge, or may be formed by splicing a plurality of pieces of sponge.

[0067] In some embodiments, the fresh air device 200 further includes a locking assembly for locking the inspection cover 30. Exemplarily, the inspection cover 30 has a first locking member, and the housing 10 has a second locking member, and the first locking member and the second locking member can be locked to fix the inspection cover 30 to the housing 10, or unlocked to release the fixing of the inspection cover 30.

[0068] Exemplarily, the first locking piece is located on the surrounding edge 33 opposite to the flange 32 .

[0069] The present application also provides a fresh air device 200, see Fig.15 , including the housing assembly 100 described in any one of the embodiments of the present application. The fresh air device 200 may also include a heat exchange core 210, and the heat exchange core 210 is located in the accommodating cavity 10a. Exemplarily, the cover body 20 and the inspection cover 30 close the assembly opening to jointly define a heat exchange cavity and a fan cavity, the heat exchange core 210 is located in the heat exchange cavity, and the fan is located in the fan cavity.

[0070] For some examples, see Fig.15 , it is understandable that Fig.15 The X in the figure represents a first direction. The first side plate 11 of the housing 10 along the first direction forms a return air port 11a and a supply air port 11b. The second side plate 12 of the housing 10 along the first direction forms a fresh air port 12a and an exhaust air port 12b. The return air port 11a is used to introduce indoor airflow into the housing 10.

[0071] Exemplarily, the first airflow path is the path that the indoor airflow passes through after entering the housing 10 from the return air port 11a, and the second airflow path is the path that the outdoor airflow passes through after entering the housing 10 from the fresh air port 12a. The indoor airflow and the outdoor airflow exchange heat in the housing 10 through the heat exchange core 210. The indoor airflow enters the housing 10 from the return air port 11a, flows along the first airflow path in the housing 10, and is then discharged to the outside from the exhaust port 12b. The outdoor airflow enters the housing 10 from the fresh air port 12a, flows along the second airflow path in the housing 10, and is then discharged to the room from the air supply port 11b.

[0072] In the description of the present application, the description with reference to the terms "in one embodiment", "in some embodiments" or "exemplary" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0073] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A housing assembly of a fresh air device, characterized in that: include: A housing, wherein the housing is formed with a receiving cavity and an assembly port communicating with the receiving cavity; A cover body, the cover body comprising a plate body, a portion of an outer surface of the plate body being recessed to form an avoidance groove; An inspection cover, wherein the cover body and the inspection cover jointly shield the assembly port, the cover body and the inspection cover are both integrally formed structures, the inspection cover comprises a main board and a flange, the plate body and the main board jointly shield the assembly port, and the flange is bent from the main board toward the avoidance groove.

2. The housing assembly according to claim 1, characterized in that The housing assembly comprises a rotating mechanism located in the accommodating cavity, and the cover body and the inspection cover are rotatably connected via the rotating mechanism.

3. The housing assembly according to claim 2, characterized in that The rotating mechanism comprises: A base, disposed on the inner surface of the cover; The rotating part comprises a fixing part and a transition part, wherein the fixing part is arranged on the inner surface of the inspection cover, one end of the transition part is rotatably connected to the base, and the other end of the transition part is fixedly connected to the fixing part.

4. The housing assembly according to claim 3, characterized in that: The portion of the adapter portion located between the base and the fixing portion protrudes in a direction away from the cover body.

5. The housing assembly according to claim 1, wherein: The main board extends to the avoidance groove.

6. The housing assembly according to claim 5, characterized in that The housing assembly includes a first sealing member disposed on the inner surface of the main board, and the inspection cover includes a rim extending from one end of the flange around the periphery of the main board to the other end of the flange, and the rim surrounds the outer periphery of the first sealing member.

7. The housing assembly according to claim 5, characterized in that The shell assembly includes a first seal, and the avoidance groove includes a first side wall, a second side wall and a third side wall. The first side wall extends inward from the plate body, and the third side wall is spaced apart on a side of the first side wall close to the main board. The second side wall connects the inward end of the first side wall and the inward end of the third side wall. The first seal is arranged on the inner surface of the main board, and a portion of the first seal abuts against the outward end of the third side wall.

8. The housing assembly according to claim 5, characterized in that The shell assembly includes a second seal arranged on the inner surface of the plate body, and the cover body includes a folded edge, which extends from one end of the avoidance groove around the periphery of the plate body to the other end of the avoidance groove, and the folded edge surrounds the outer periphery of the second seal.

9. A fresh air device, characterized in that: A housing assembly comprising any one of claims 1 to 8.