Shell assembly and fresh air equipment

Abstract

The utility model relates to the technical field of air conditioning, and provides a shell assembly and fresh air equipment. The shell assembly comprises a shell and an access cover. The shell comprises a cover body, and an assembling opening is formed in the cover body; the access cover comprises a base plate and a pressing block, the cover body and the base plate are stacked in the first direction, the pressing block is located on one side of the base plate in the first direction, one end of the pressing block is connected with the base plate, the other end of the pressing block is a free end, and the free end penetrates through the assembly opening so that the peripheral portion of the assembly opening can be clamped between the pressing block and the base plate. According to the shell assembly and the fresh air equipment, the installation procedure can be simplified, and operation is convenient.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to a housing component 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, thereby improving the indoor environment. The housing assembly of the fresh air equipment is provided with a housing and an inspection cover. In the related art, the inspection cover and the housing need to be connected by hinges when assembled, and the assembly parts are many and cumbersome. After assembly, many rivet heads and screw heads will be left, affecting the appearance of the fresh air equipment. Sponge needs to be pasted to cover it up, and the sponge is easily scratched during transportation and installation. Utility Model Content

[0004] In view of this, the present application hopes to provide a housing assembly and a fresh air device that can simplify the installation steps of the inspection cover and the housing.

[0005] The embodiment of the present application provides a housing assembly, which includes a housing and an inspection cover. The housing includes a cover body, which is formed with an assembly opening; the inspection cover includes a base plate and a pressing block, the cover body and the base plate are stacked along a first direction, the pressing block is located on one side of the base plate along the first direction, one end of the pressing block is connected to the base plate, and the other end of the pressing block is a free end, which passes through the assembly opening so that the surrounding area of ​​the assembly opening is clamped between the pressing block and the base plate.

[0006] In some embodiments, the pressing block and the substrate are an integrally formed structure.

[0007] In some embodiments, the pressing block and the substrate are sheet metal structures.

[0008] In some embodiments, the pressing block and the substrate are an integrally formed structure; the pressing block and the substrate are sheet metal structures.

[0009] In some embodiments, the substrate includes a main body and a flange, the flange is bent from the main body toward a first direction, the pressure block is arranged on a side of the flange away from the main body, and the surrounding area of ​​the assembly port is clamped between the pressure block and the flange.

[0010] In some embodiments, the flange is formed with at least one weight-reducing hole.

[0011] In some embodiments, the shell assembly includes a sealing layer, the substrate includes a main body and an annular folded edge, the sealing layer is arranged on the side of the main body facing the cover body, the sealing layer has an avoidance hole for avoiding the pressure block, the annular folded edge extends from the main body to the side where the cover body is located, and the annular folded edge surrounds the outer periphery of the sealing layer.

[0012] In some embodiments, the pressing block includes a clamping portion, the clamping portion connects the free end and the substrate, and the free end is inclined in a direction away from the clamping portion.

[0013] In some embodiments, the cover body is formed with a filter access port and a hand hole, the hand hole is connected to the filter access port, and the inspection cover selectively covers or opens the filter access port and the hand hole.

[0014] In some embodiments, there are plural numbers of the assembly openings and the pressing blocks, each pressing block corresponds to one assembly opening, and at least one assembly opening is connected to the hand-receiving hole.

[0015] In some embodiments, the plurality of filter access ports include a first access port, a second access port and a third access port, the second access port and the third access port are arranged and connected along a second direction, the first access port is spaced apart on a side of the third access port away from the second access port, and the first direction and the second direction are perpendicular to each other.

[0016] In some embodiments, the housing is used to place a filter, each of the filter is divided into a plurality of filter units, and the length of the filter access opening is greater than or equal to the length of the filter unit.

[0017] In some embodiments, the housing includes a shell having an installation opening opened on one side facing the first direction, and the cover body closes the installation opening.

[0018] In some embodiments, the housing assembly includes a locking assembly, and the locking assembly includes a hook, a pressing member, a hanging ring, and a fixing member, the pressing member and the hanging ring are located on the fixing member, the fixing member is fixed to the housing, the hook is arranged on the inspection cover, and the pressing member moves to lock the hanging ring to the hook or unlock the hanging ring from the hook. The embodiment of the present application also provides a fresh air device, including any of the housing assemblies and a heat exchange core described above, wherein the heat exchange core is located in the housing.

[0019] The housing assembly provided in the embodiment of the present application does not need to use connecting parts such as hinges. The inspection cover is fixed to the cover body by snapping the pressing block on the inspection cover with the cover body. When installing, align the pressing block of the inspection cover with the assembly opening, pass the free end through the assembly opening, and continue to push the inspection cover so that the surrounding area of ​​the assembly opening is confined between the pressing block and the base plate, and the cover body and the inspection cover are snapped. In this way, the installation process and parts can be simplified, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the fresh air equipment in some embodiments of the present application;

[0021] Figure 2 It is a schematic diagram of the structure of the cover body in some embodiments of the present application;

[0022] Figure 3 It is a partial structural schematic diagram of the cover body and the inspection cover in some embodiments of the present application;

[0023] Figure 4 Another structural schematic diagram of the cover body and the inspection cover in some embodiments of the present application;

[0024] Figure 5 It is a schematic diagram of the structure of the inspection cover in some embodiments of the present application;

[0025] Figure 6 This is a schematic diagram of the structure of the inspection cover and the sealing layer in some embodiments of the present application;

[0026] Figure 7 for Figure 1 Schematic diagram of the partial structure of the new air equipment;

[0027] Figure 8 for Figure 1 Another partial structural diagram of the Zhongxin air equipment.

[0028] Description of Reference Numerals

[0029] 100, housing assembly; 10, housing; 11, cover; 11a, assembly port; 11b, filter access port; 11b1, first access port; 11b2, second access port; 11b3, third access port; 11c, hand hole; 12, housing; 20, inspection cover; 21, base plate; 211, main body; 212, flange; 213, annular fold; 212a, weight reduction hole; 22, pressing block; 221, Clamping portion; 222, free end; 30, sealing layer; 30a, avoidance hole; 200, fresh air device; 210, heat exchange core; 121, first side wall; 121a, return air outlet; 121b, supply air outlet; 122, second side wall; 122a, fresh air outlet; 122b, exhaust outlet; 40, locking assembly; 50, filter; 51, first filter; 52, second filter; 53, third filter. DETAILED DESCRIPTION

[0030] 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.

[0031] It should be noted that in the embodiments of the present application, down refers to the direction where the ground is located, and up is opposite to down; in the embodiments of the present application, the orientations or positional relationships such as "up", "down", "inside", "outside", "first direction", and "second direction" are based on the orientations or positional relationships shown in the accompanying 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 will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] In the related art, the inspection panel area of ​​the fresh air equipment is large, and a larger inspection port needs to be opened to meet the needs. The outer shell and the inspection cover need to be connected by hinges, which makes the assembly complicated and leaves more rivet heads and screw heads, affecting the appearance.

[0033] In view of this, please refer to Figure 1-Figure 5 The embodiment of the present application provides a housing assembly 100 of a fresh air device 200, comprising a housing 10 and an inspection cover 20. The housing 10 comprises a cover body 11, and the cover body 11 is formed with an assembly opening 11a; the inspection cover 20 comprises a base plate 21 and a pressing block 22, the cover body 11 and the base plate 21 are stacked along a first direction, the pressing block 22 is located on one side of the base plate 21 along the first direction, one end of the pressing block 22 is connected to the base plate 21, and the other end of the pressing block 22 is a free end 222, and the free end 222 passes through the assembly opening 11a, so that the surrounding part of the assembly opening 11a is clamped between the pressing block 22 and the base plate 21.

[0034] Understandably, Figure 1 and Figure 3 The Z in the middle represents the first direction. Figure 4 , Figure 7 and Figure 8 Y represents the second direction.

[0035] 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.

[0036] The housing 10 is used to provide installation space for structures such as the heat exchange core 210 and the fan. The shape of the housing 10 can be similar to a rectangular parallelepiped. The housing 10 includes a shell 12 and a cover 11. The shell 12 and the cover 11 are arranged to form an installation space for installing structures such as the fan and the heat exchange core 210.

[0037] 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.

[0038] When the fresh air device 200 provided in the embodiment of the present application is installed on a ceiling or a suspended ceiling panel, the first direction is consistent with the up and down direction. Taking the outer shell 10 as an example, which is roughly hexahedral, the first direction can be the thickness direction of the outer shell 10, and the second direction can be the width direction of the outer shell 10 or the length direction of the outer shell 10.

[0039] For example, see Figure 3 One end of the pressing block 22 is fixed to the base plate 21, and the other end of the pressing block 22 enters the cover body 11 from the assembly opening 11a. The free end 222 of the inspection cover 20 is adapted to the assembly opening 11a so that the free end 222 can pass through the assembly opening 11a.

[0040] When installing the inspection cover 20, the free end 222 is passed through the assembly opening 11a and the inspection cover 20 is continuously pushed until the surrounding area of ​​the assembly opening 11a is clamped between the pressing block 22 and the base plate 21, so that the inspection cover 20 is relatively fixed to the cover body 11. When removing the inspection cover 20, the inspection cover 20 is moved in the direction opposite to the insertion direction, so that the surrounding area of ​​the assembly opening 11a is pulled out from between the pressing block 22 and the base plate 21, and the inspection cover 20 and the cover body 11 are released, and the inspection cover 20 can be removed smoothly.

[0041] In this embodiment, there is no need to use connecting parts such as hinges. The inspection cover 20 is fixed to the cover body 11 by snapping the pressing block 22 on the inspection cover 20 with the cover body 11. When installing, align the pressing block 22 of the inspection cover 20 with the assembly opening 11a, make the free end 222 pass through the assembly opening 11a, and continue to push the inspection cover 20 so that the surrounding area of ​​the assembly opening 11a is confined between the pressing block 22 and the base plate 21, and the cover body 11 and the inspection cover 20 are snapped. In this way, the installation process and parts can be simplified, and the operation is convenient.

[0042] In some embodiments, the pressing block 22 and the base plate 21 are an integrally formed structure.

[0043] In this way, the structural strength of the pressing block 22 can be increased, and the possibility of the pressing block 22 being disconnected from the base plate 21 due to resistance when the inspection cover 20 is pushed can be reduced, and relative displacement between the pressing block 22 and the base plate 21 can be avoided. The use of redundant installation parts can be reduced, and the overall weight of the fresh air device 200 can be reduced.

[0044] In some embodiments, the pressing block 22 and the base plate 21 are sheet metal structures. The sheet metal structure refers to a structure formed by cold processing such as stamping, shearing or bending of a metal plate.

[0045] In this way, the overall weight of the inspection cover 20 can be reduced, the strength of the inspection cover 20 can be improved, and the possibility of the strength of the pressing block 22 and the substrate 21 being damaged when the surrounding area of ​​the assembly opening 11 a is stuck between the pressing block 22 and the substrate 21 is reduced.

[0046] For some examples, see Figure 5 The base plate 21 includes a main body 211 and a flange 212. The flange 212 is bent from the main body 211 toward one side of the first direction. The pressing block 22 is arranged on the side of the flange 212 away from the main body 211. The surrounding parts of the assembly port 11a are clamped between the pressing block 22 and the flange 212. There is a buffer space between the flange 212 and the main body 211. When the inspection cover 20 is pushed, the surrounding parts of the assembly port 11a move toward between the pressing block 22 and the flange 212. The buffer space can reduce the resistance encountered when the inspection cover 20 is pushed, so that the surrounding parts of the assembly port 11a can enter between the pressing block 22 and the flange 212, and the installation and removal of the inspection cover 20 are convenient.

[0047] For example, the pressing block 22 can be formed by stamping, and the flange 212 can be formed by bending or stamping.

[0048] For some examples, see Figure 5 The flange 212 is formed with at least one weight-reducing hole 212 a.

[0049] In this embodiment, by providing the weight-reducing holes 212a, the weight of the inspection cover 20 can be further reduced, thereby reducing the weight of the entire fresh air device 200 and facilitating disassembly and assembly.

[0050] For example, see Figure 5 The flange 212 is formed with three weight-reducing holes 212 a , and a weight-reducing hole 212 a is provided between every two pressing blocks 22 .

[0051] Exemplarily, the weight-reducing hole 212a is a rectangle. In some embodiments, the weight-reducing hole 212a may also be other regular or irregular shapes.

[0052] For some examples, see Figure 5 and Figure 6 The housing assembly 100 includes a sealing layer 30, and the substrate 21 includes a main body 211 and an annular folded edge 213. The sealing layer 30 is arranged on the side of the main body 211 facing the cover body 11. The sealing layer 30 has an avoidance hole 30a for avoiding the pressure block 22. The annular folded edge 213 extends from the main body 211 to the side where the cover body 11 is located, and the annular folded edge 213 surrounds the outer periphery of the sealing layer 30.

[0053] The sealing layer 30 is used to seal the base plate 21 to reduce the possibility of air leakage inside the fresh air device 200 affecting the air intake effect, and reduce the adverse effects such as noise caused by vibration of the fresh air device 200. The annular fold 213 can limit the inspection cover 20 to prevent the inspection cover 20 from moving, and at the same time can form a accommodating space for the sealing layer 30 to prevent the sealing layer 30 from being exposed and affecting the appearance of the fresh air device 200.

[0054] Exemplarily, the sealing layer 30 is configured as a sponge, which can absorb noise while sealing the access cover 20 .

[0055] For some examples, see Figure 3 The pressing block 22 includes a clamping portion 221 , the clamping portion 221 connects the free end 222 and the substrate 21 , and the free end 222 is inclined in a direction away from the clamping portion 221 .

[0056] In this embodiment, when installing the inspection cover 20 , the free end 222 is first used for pre-positioning, and then the clamping portion 221 is used for press-fitting, which can improve the installation efficiency and the fixing effect of the inspection cover 20 on the cover body 11 .

[0057] For some examples, see Figure 2 and Figure 4 The cover body 11 is formed with a filter access opening 11b and a hand hole 11c, and the hand hole 11c is connected to the filter access opening 11b. The inspection cover 20 selectively covers or opens the filter access opening 11b and the hand hole 11c. The filter access opening 11b is used to take the filter out. The hand hole 11c is adapted to the hand, that is, it can accommodate the operator's hand or tool opening.

[0058] In some embodiments, the housing 10 is used to place a filter 50 , each filter 50 is divided into a plurality of filter units, and the length of the filter access opening 11 b is greater than or equal to the length of the filter unit and less than the length of the filter 50 .

[0059] The filter 50 is used to clean and filter the indoor and outdoor airflows entering the fresh air device 200. When the filter 50 needs to be removed, the inspection cover 20 is removed to expose the filter access opening 11b and the hand hole 11c, and the hand or tool is inserted into the hand hole 11c to take out the filter 50; when the filter 50 needs to be installed, the filter 50 is held in the hand and inserted into the housing 10 through the filter access opening 11b, and then the inspection cover 20 is installed. In this way, the filter 50 can be installed and removed.

[0060] The filter 50 may include a plurality of filter monomers, and the plurality of filter monomers may be arranged in a direction perpendicular to the thickness direction thereof, and the plurality of filter monomers may be placed in the housing 10 in sequence through the filter access opening 11b. For example, in the process of assembling a plurality of filter monomers, a filter monomer may be inserted into the filter access opening 11b first, and after the filter monomer enters the housing 10, it may be moved in a direction perpendicular to the thickness direction of the filter monomer until it avoids the filter access opening 11b, and then the next filter monomer may be inserted into the filter access opening 11b, so that a plurality of filter monomers may be placed in sequence through the filter access opening 11b. In this way, the area of ​​the cover 11 occupied by the required filter access opening 11b and the hand hole 11c may be reduced, thereby reducing the area of ​​the inspection cover 20.

[0061] For some examples, see Figure 4 There are multiple assembly ports 11a and multiple pressing blocks 22, each pressing block 22 corresponds to one assembly port 11a, and at least one assembly port 11a is connected to the hand hole 11c.

[0062] The fixing effect of the inspection cover 20 can be improved by using a plurality of pressing blocks 22. Figure 4 The pressing block 22 and the assembly opening 11a are both arranged at intervals. The assembly opening 11a is connected to the hand hole 11c, which can reduce the hollowing area on the cover body 11 and reduce the adverse effect on the structural strength of the cover body 11.

[0063] For some examples, see Figure 4 The plurality of filter access ports 11b include a first access port 11b1, a second access port 11b2 and a third access port 11b3. The second access port 11b2 and the third access port 11b3 are arranged and connected along the second direction. The first access port 11b1 is spaced apart on a side of the third access port 11b3 away from the second access port 11b2. The first direction and the second direction are perpendicular to each other.

[0064] In this embodiment, by providing a plurality of filter screen access openings 11b, the corresponding filter screens 50 can be placed or taken out independently. In this way, filter screens 50 of different types and / or different uses can be provided at different positions of the airflow path according to filtering requirements.

[0065] Indoor air flow is usually called return air, and outdoor air flow is usually called fresh air.

[0066] In one embodiment, please refer to Figure 7 The first side wall 121 of the housing 10 along the second direction forms a return air port 121a and an air supply port 121b, and the second side wall 122 of the housing 10 along the second direction forms a fresh air port 122a and an exhaust air port 122b. The return air port 121a is used to introduce indoor airflow into the housing 10. The fresh air port 122a is used to introduce outdoor airflow into the housing 10.

[0067] Exemplarily, the first airflow path is the path that the airflow passes through after entering the housing 10 from the return air port 121 a , and the second airflow path is the path that the airflow passes through after entering the housing 10 from the fresh air port 122 a .

[0068] Regarding indoor airflow: the indoor airflow enters the housing 10 from the return air port 121a, flows along the first airflow path in the housing 10, and is then discharged to the outdoors from the exhaust port 122b. That is, the first airflow path is the return air path of the indoor airflow.

[0069] Regarding outdoor airflow: the outdoor airflow enters the housing 10 from the fresh air inlet 122a, flows along the second airflow path in the housing 10, and is then discharged into the room from the air supply outlet 121b. That is, the second airflow path is the fresh air path for the outdoor airflow.

[0070] The first access opening 11b1, the second access opening 11b2 and the third access opening 11b3 can be used to place filters 50 of different types or for different purposes.

[0071] For example, see Figure 7A first filter 51 is provided on one side of the heat exchange core 210 adjacent to the fresh air outlet 122a, and performs primary filtration on the indoor airflow. A second filter 52 and a third filter 53 are provided on one side of the heat exchange core 210 adjacent to the return air outlet 121a, and the second filter 52 performs primary filtration on the outdoor airflow, and the third filter 53 performs high-efficiency filtration on the outdoor fresh air.

[0072] Primary filtration and high efficiency filtration can improve the cleanliness of airflow. The functions of primary filtration and high efficiency filtration include but are not limited to removing dust, microorganisms and / or harmful gases in the air.

[0073] High efficiency filtration can achieve the effects of absorbing PM2.5 and / or removing odors, etc. The third filter 53 includes but is not limited to HEPA (High Efficiency Particulate Air Filter) and / or HAF (High AirFlow, ultra-large flow electrostatic filter).

[0074] For some examples, see Figure 8 The housing 10 includes a shell 12, the shell 12 has an installation opening opened on one side facing the first direction, and the cover 11 closes the installation opening. The installation opening of the shell 12 is used to install the internal structure of the fresh air device 200, and the cover 11 closes the installation opening to jointly define an installation space inside the fresh air device 200.

[0075] For some examples, see Figure 1 The housing assembly 100 includes a locking assembly 40, which includes a hook, a pressing member, a hanging ring and a fixing member. The pressing member and the hanging ring are located on the fixing member, the fixing member is fixed to the housing 12, the hook is arranged on the inspection cover 20, and the pressing member moves so that the hanging ring is locked to the hook or the hanging ring is unlocked from the hook. Exemplarily, the end of the inspection cover 20 away from the assembly port 11a also includes a hook. When the inspection cover 20 needs to be disassembled, the pressing member is pulled up to release the lock of the hook and the hanging ring, and the hanging ring is removed from the hook to release the lock on the end of the inspection cover 20 away from the assembly port 11a; when the inspection cover 20 needs to be locked, the end of the inspection cover 20 with the assembly port 11a is pushed to engage with the cover body 11, the hanging ring is hung on the hook, and the pressing member is pressed downward to lock the hanging ring and the hook, thereby locking the end of the inspection cover 20 away from the assembly port 11a. In this way, the fixing effect of the inspection cover 20 can be improved.

[0076] The present application also provides a fresh air device 200, see Figure 8, comprising any one of the above-mentioned housing components 100 and a heat exchange core 210. The heat exchange core 210 is located in the housing 10. Exemplarily, the cover 11 closes the mounting 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.

[0077] The heat exchange core 210 is usually made of aluminum paper or thin metal material. Both outdoor fresh air and indoor air pass through the heat exchange core 210, but the outdoor fresh air and indoor air do not contact or mix, and heat is exchanged through the heat exchange core 210, so that the temperature difference between the outdoor fresh air and the indoor air is rapidly reduced. The heat exchange core 210 is located in the heat exchange cavity, and the two fans are located in the fan cavity. The fan cavity and the heat exchange core 210 are roughly T-shaped, so that the air flow in the housing 10 is smoother, and the air volume is large, the energy consumption is low, and the sound is quiet. In the description of the present application, the description of the reference terms "in one embodiment", "in some embodiments" or "exemplary" 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 embodiment 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 can be combined in any one or more embodiments or examples in a suitable manner. Furthermore, those skilled in the art may combine different embodiments or examples described in the present application and features of different embodiments or examples without mutual contradiction.

[0078] 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, the housing comprising a cover body, the cover body being formed with an assembly opening; The inspection cover comprises a base plate and a pressing block, wherein the cover body and the base plate are stacked along a first direction, the pressing block is located on one side of the base plate along the first direction, one end of the pressing block is connected to the base plate, and the other end of the pressing block is a free end, and the free end passes through the assembly port so that the surrounding area of ​​the assembly port is clamped between the pressing block and the base plate.

2. The housing assembly according to claim 1, characterized in that The pressing block and the substrate are an integrally formed structure; and / or the pressing block and the substrate are a sheet metal structure.

3. The housing assembly according to claim 1, characterized in that The base plate comprises a main body and a flange, wherein the flange is bent from the main body toward a first direction, the pressing block is arranged on a side of the flange away from the main body, and the surrounding area of ​​the assembly opening is clamped between the pressing block and the flange.

4. The housing assembly according to claim 3, characterized in that: The flange is formed with at least one weight-reducing hole.

5. The housing assembly according to claim 1, wherein: The shell component includes a sealing layer, the substrate includes a main body and an annular folded edge, the sealing layer is arranged on the side of the main body facing the cover body, the sealing layer has an avoidance hole for avoiding the pressure block, the annular folded edge extends from the main body to the side where the cover body is located, and the annular folded edge surrounds the outer periphery of the sealing layer.

6. The housing assembly according to claim 1, wherein: The pressing block comprises a clamping portion, the clamping portion connects the free end and the substrate, and the free end is inclined in a direction away from the clamping portion.

7. The housing assembly according to any one of claims 1 to 6, characterized in that: The cover body is formed with a filter access opening and a hand hole, the hand hole is communicated with the filter access opening, and the inspection cover selectively covers or opens the filter access opening and the hand hole.

8. The housing assembly according to claim 7, characterized in that: The number of the assembly openings and the pressing blocks are both multiple, each pressing block corresponds to one assembly opening, and at least one assembly opening is communicated with the hand-receiving hole.

9. The housing assembly according to claim 7, characterized in that: The multiple filter access ports include a first access port, a second access port and a third access port, the second access port and the third access port are arranged and connected along the second direction, the first access port is spaced apart on the side of the third access port away from the second access port, and the first direction and the second direction are perpendicular to each other.

10. The housing assembly according to claim 7, wherein: The housing is used to place a filter screen, each of the filter screens is divided into a plurality of filter screen units, and the length of the filter screen access opening is greater than or equal to the length of the filter screen unit.

11. The housing assembly according to any one of claims 1 to 6, characterized in that: The housing comprises a shell having an installation opening opened on one side facing a first direction, and the cover body closes the installation opening.

12. The housing assembly according to claim 11, characterized in that The housing assembly includes a locking assembly, which includes a hook, a push-down piece, a hanging ring and a fixing piece, wherein the push-down piece and the hanging ring are located on the fixing piece, the fixing piece is fixed to the housing, the hook is arranged on the inspection cover, and the push-down piece moves to lock the hanging ring to the hook or unlock the hanging ring from the hook.

13. A fresh air device, characterized in that: include: The housing assembly according to any one of claims 1 to 12.

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