Wall-mounted fresh air conditioner

By integrating the fresh air components with the electronic control components, the problems of increasing the horizontal size and high installation complexity of the existing fresh air air conditioner are solved, and the compact layout of the air conditioner and simplifying the assembly process is realized.

CN120466741APending Publication Date: 2025-08-12SICHUAN CHANGHONG AIR CONDITIONER CO LTD
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Patent Information

Application Number
CN202510721158.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-30
Publication Date
2025-08-12

AI Technical Summary

Technical Problem

The split design of the fresh air device and electronic control components of the existing fresh air conditioner leads to an increase in the horizontal dimension of the air conditioner, high installation complexity, and long cable connection distance, which increases the difficulty of material and assembly.

Method used

The integrated design of fresh air components and electrical control components is adopted, and the limited space of the air conditioner is rationally utilized to shorten the length of the connecting wires, and the integrated design is used to reduce the number of parts and the demand for wiring ducts.

Benefits of technology

It realizes a more compact layout of the air conditioner, reduces the horizontal size and assembly difficulty of the entire machine, and improves assembly efficiency.

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Abstract

The invention discloses a wall-mounted fresh air conditioner in the technical field of air conditioners, which comprises an air conditioner base, a fresh air component and an electric control component mounted on the air conditioner base, and a mounting seat body mounted at one end of the air conditioner base in the length direction and provided with an air inlet and an air outlet along the length direction of the air conditioner base. A first cavity and a second cavity which are independent and close to each other are formed in the mounting seat body, the electric control assembly is mounted in the first cavity, the fresh air assembly is mounted in the second cavity, a wire inlet hole and a wire outlet hole which penetrate through the inner wall and the outer wall of the first cavity are formed in the first cavity, and the fresh air assembly is electrically connected with the electric control assembly. The technical problems that an existing fresh air conditioner is large in overall size and high in installation complexity are solved.
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Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a wall-mounted fresh air air conditioner. Background Art

[0002] With increasing attention to indoor air quality, modern room air conditioners are now commonly equipped with fresh air devices. These devices introduce fresh air from outside to achieve indoor-outdoor ventilation, thereby improving air circulation in enclosed environments. However, existing air conditioner fresh air devices still face significant technical bottlenecks in their design, hindering product miniaturization, cost-effectiveness, and efficient production.

[0003] In the current mainstream technical solutions, the fresh air device and the air conditioner electronic control component are mostly split designs. For example, the Chinese utility model patent with publication number CN214038664U discloses a fresh air base and an air conditioner. The air conditioner in this patent includes a base body, a fresh air base, an electric control box base, an electric control component and a fresh air device. Along the length direction of the base body, the fresh air base is detachably arranged at one end of the base body, the electric control box base is arranged at the other end of the base body, the fresh air device is installed on the fresh air base, and the electric control component is installed on the electric control box base. The fresh air device and the electric control component are both installed independently. Although they can meet basic functional requirements, they expose the following technical defects: 1. The split layout requires reserved installation space for the fresh air device (such as centrifugal fan, filter assembly) and the electrical control box (including PCB board, terminal blocks, etc.) in the length direction of the base body, which forces the lateral size of the air conditioner to increase. This not only increases the amount of shell material used, but also affects the flexibility of indoor installation due to its bloated appearance.

[0004] 2. The fresh air device is far away from the electronic control components. The fresh air device is connected to the remote electronic control components through long-distance cables, which not only increases the cost of wires, but also requires separate wiring route design. For example, auxiliary fixing structures such as cable troughs and clips are added to prevent the lines from loosening, which indirectly increases the complexity of assembly. Summary of the Invention

[0005] In order to solve the technical problems of large size and high installation complexity of existing fresh air air conditioners, the present invention provides a wall-mounted fresh air air conditioner with an integrated design of fresh air components and electronic control components.

[0006] The technical solution adopted by the present invention to solve its technical problem is: A wall-mounted fresh air air conditioner includes an air conditioner base and a fresh air component and an electronic control component installed on the air conditioner base. It also includes a mounting base body, which is installed at one end of the air conditioner base in the length direction. Along the length direction of the air conditioner base, the mounting base body is provided with a first cavity and a second cavity that are independent of each other and close to each other. The electronic control component is installed in the first cavity, and the fresh air component is installed in the second cavity. The first cavity is provided with a wire inlet hole and a wire outlet hole that pass through the inner and outer walls of the first cavity. The fresh air component is electrically connected to the electronic control component.

[0007] Furthermore, the second cavity and the first cavity are arranged in sequence along the direction from the location of the mounting base to the other end of the air conditioner base.

[0008] Furthermore, the fresh air component includes a centrifugal fan and a filter element. The second cavity is provided with an air inlet and an air outlet that penetrate the inner wall and outer wall of the second cavity. The centrifugal fan and the filter element are arranged in the second cavity in sequence. The air enters through the air inlet, passes through the centrifugal fan and the filter element in sequence, and is discharged through the air outlet.

[0009] Furthermore, the second cavity includes a first cavity and a second cavity which are interconnected, the mounting seat includes a first seat, a second seat and a third seat, the first seat is sealedly connected to the second seat, a first cavity is formed between the first seat and the second seat, the air inlet is connected to the first cavity, the centrifugal fan is installed in the first cavity, the third seat is sealedly connected to the second seat, a second cavity is formed between the second seat and the third seat, the filter element is installed in the second cavity, the filter element separates the second cavity into a first area and a second area, the first area is connected to the first cavity, and the second area is connected to the air outlet.

[0010] Furthermore, the second cavity is provided with a strip opening penetrating the inner and outer walls of the second cavity, the front end of the filter element is detachably inserted into the strip opening, and the rear end of the filter element has a sealing structure for sealing the strip opening.

[0011] Furthermore, a wire pressing plate is installed on the outer wall of the third body to fix the cables of the electronic control components.

[0012] Furthermore, at least one mounting ear is provided on one side of the mounting base body, a first through hole is provided on the mounting ear, a screw column is correspondingly provided on the air conditioner base, a first threaded hole is provided on the screw column, and a first screw is also included, the head of the first screw passes through the first through hole and is threadedly engaged with the first threaded hole, and the tail of the first screw presses the mounting ear, and at least one pin is provided on the side of the mounting base body itself opposite to the mounting ear, a pin hole is correspondingly provided on the air conditioner base, and the pin is plugged into and engaged with the pin hole.

[0013] Furthermore, an opening is provided on the side of the first cavity, and the electronic control component includes a main control circuit board, which is inserted into the first cavity through the opening. Bar slots are provided on the opposite side walls inside the first cavity, and the bar slots extend along the insertion direction of the main control circuit board. The opposite sides of the main control circuit board are respectively inserted into the corresponding bar slots. A cover plate is also included, which is fixedly arranged at the opening to shield the main control circuit board in the first cavity.

[0014] Furthermore, it also includes a middle frame, which is installed on the air conditioner base and covered outside the mounting base. A avoidance opening corresponding to the opening is opened on the middle frame, and there is a gap between the inner surface of the middle frame and the edge of the opening. One side of the cover plate is provided with an insert, which extends along the edge of the cover plate and is inserted into the gap between the middle frame and the edge of the opening. A second through hole is provided on the side of the cover plate opposite to the insert, and a second threaded hole is provided corresponding to the open edge of the first cavity. It also includes a second screw, the head of the second screw passes through the second through hole and is threadedly engaged with the second threaded hole, and the tail of the second screw presses the cover plate tightly.

[0015] The beneficial effects of the present invention are: Compared to the existing technology where the fresh air assembly and the electronic control assembly are independently arranged at both ends of the air conditioner base, which increases the lateral size of the air conditioner, the present invention integrates the fresh air assembly and the electronic control assembly into an integrated design, making rational and effective use of limited space and achieving a more compact air conditioner layout. The fresh air assembly is closer to the electronic control assembly, which shortens the length of the wires and eliminates the need for separate wiring troughs, making wiring easier. The integrated design also reduces the number of parts used in the entire unit, improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of the mounting base of the present invention being mounted on an air conditioner base; Figure 2 1. It is a structural diagram of the mounting base; Figure 3 This is a structural diagram of the mounting base from another perspective; Figure 4 It is an exploded schematic diagram of the mounting base body; Figure 5 It is a schematic diagram of the structure of the third body; Figure 6 This is a structural diagram of the third body from another perspective; Figure 7 It is a schematic diagram of the structure on the base of the air conditioner; Figure 8 This is a structural diagram of the mounting base and the air conditioner base; Figure 9 yes Figure 8 Schematic diagram of the local structure of A; Figure 10It is a structural diagram of the middle frame cover being arranged on the air conditioner base; Figure 11 is Figure 10 Structural diagram of installing the cover plate and filter element on the basis; Figure 12 It is a structural diagram of the cover; Figure 13 This is a schematic diagram of the coordination of the cover, middle frame and mounting base; Marked in the figure are, 1-air conditioner base, 2-mounting body, 2a-first base body, 2b-second base body, 2c-third base body, 3-first cavity, 4-second cavity, 5-wire inlet, 6-wire outlet, 7-centrifugal fan, 8-filter, 9-air inlet, 10-air outlet, 11-strip opening, 12-wire pressing plate, 13-mounting ear, 14-first through hole, 15-first threaded hole, 16-pin, 17-pin hole, 18-opening, 19-main control circuit board, 20-strip card slot, 21-cover, 22-middle frame, 23-insert, 24-second through hole, 25-second threaded hole. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the embodiments of the present application more clear, the present invention is further described below with reference to the accompanying drawings.

[0018] First of all, it needs to be stated that the technical solutions of the embodiments of the present application are clearly and completely described. The described embodiments are part of the embodiments of the present application and are not limitations of the present invention. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.

[0019] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by terms such as "first", "second", "upper", "lower", "left", "right", "inner", "outer", "axial" or "radial" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention, rather than for indicating or implying that the device or element referred to must have a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present invention.

[0020] Reference Figures 1 to 13 The present invention provides a wall-mounted fresh air air conditioner.

[0021] like Figure 1As shown, this embodiment provides a wall-mounted fresh air air conditioner, including an air conditioner base 1 and a fresh air component and an electronic control component installed on the air conditioner base 1, and also includes a mounting base body 2, which is installed at one end of the air conditioner base 1 in the length direction. Along the length direction of the air conditioner base 1, the mounting base body 2 is provided with a first cavity 3 and a second cavity 4 that are independent of each other and close to each other, the electronic control component is installed in the first cavity 3, and the fresh air component is installed in the second cavity 4. The first cavity 3 is provided with a wire inlet hole 5 and a wire outlet hole 6 that pass through the inner and outer walls of the first cavity 3, and the fresh air component is electrically connected to the electronic control component.

[0022] This embodiment integrates the fresh air component and the electronic control component into an integrated design, making rational and effective use of limited space to achieve a more compact layout of the air conditioner; the fresh air component is closer to the electronic control component, which can shorten the length of the wires and eliminate the need to open a separate wiring trough, thereby reducing the difficulty of wiring; the integrated design also reduces the number of parts used in the whole machine, thereby improving the assembly efficiency of the whole machine.

[0023] like Figure 1 As shown, in some embodiments, the second cavity 4 and the first cavity 3 are arranged in sequence along the direction from the location of the mounting base 2 to the other end of the air conditioner base 1. Here, the first cavity 3 is set between the second cavity 4 and the air conditioner evaporator, which shortens the length of the connecting wire between the electronic control component and the fresh air component, and shortens the length of the connecting wire between the electronic control component and electrical components such as the air conditioner evaporator, making the whole machine more compact and greatly reducing the difficulty of wiring. This embodiment is a preferred example. In addition to this, it can also be set to the direction from the location of the mounting base 2 to the other end of the air conditioner base 1, with the first cavity 3 and the second cavity 4 arranged in sequence. Although the electronic control component is located outside the fresh air component, the length of the connecting wire between the electronic control component and electrical components such as the air conditioner evaporator will increase, but the length of the connecting wire between the electronic control component and the fresh air component is not affected. This is a technical solution with slightly worse effect.

[0024] like Figures 2 to 5 As shown, in some embodiments, the fresh air component includes a centrifugal fan 7 and a filter 8. The second cavity 4 is provided with an air inlet 9 and an air outlet 10 that penetrate the inner wall and outer wall of the second cavity 4. The centrifugal fan 7 and the filter 8 are sequentially arranged in the second cavity 4. Air enters through the air inlet 9, passes through the centrifugal fan 7 and the filter 8 in sequence, and is discharged through the air outlet 10. In this solution, the air passes through the air inlet 9, the centrifugal fan 7, the filter 8, and the air outlet 10 in sequence. Of course, in order to increase the filtering effect, prevent dust accumulation in the centrifugal fan 7, and extend its service life, a filter 8 can also be arranged before the centrifugal fan 7 to ensure that the incoming air passes through the filter 8 and then enters the centrifugal fan 7, is sucked in by the centrifugal fan 7, and is then discharged into the room through the filter 8. In this solution, the air passes through the air inlet 9, the filter 8, the centrifugal fan 7, the filter 8, and the air outlet 10 in sequence.

[0025] like Figure 4 As shown, in some embodiments, the second cavity 4 includes a first cavity and a second cavity that are interconnected, the mounting seat 2 includes a first seat 2a, a second seat 2b and a third seat 2c, the first seat 2a is sealedly connected to the second seat 2b, a first cavity is formed between the first seat 2a and the second seat 2b, the air inlet 9 is connected to the first cavity, the centrifugal fan 7 is installed in the first cavity, the third seat 2c is sealedly connected to the second seat 2b, a second cavity is formed between the second seat 2b and the third seat 2c, the filter element 8 is installed in the second cavity, the filter element 8 separates the second cavity into a first area and a second area, the first area is connected to the first cavity, and the second area is connected to the air outlet 10.

[0026] In this embodiment, the mounting base 2 is designed in a segmented manner, including a first base 2a, a second base 2b, and a third base 2c. The first base 2a is specifically used to mount the centrifugal fan 7 (a high-vibration component), forming an independent first cavity to reduce the transmission of vibration to the electronic control component or filter 8. The second base 2b serves as a structural support mid-plate, separating the area where the centrifugal fan 7 is located from the area where the filter 8 is located, thereby reducing the transmission of vibration from the centrifugal fan 7 to the area where the electronic control component is located. The third base 2c has a first cavity 3 for mounting the main control circuit board 19. The third base 2c is sealedly connected to the second base 2b to form a second cavity for mounting the filter 8. This allows the electronic control component and the fresh air component to overlap in three dimensions, reducing the lateral size of the entire machine.

[0027] Furthermore, the segmented design allows for simple molds to be used for injection molding, facilitating demolding (no complex core-pulling mechanism required). This reduces mold costs and improves production yield. The centrifugal fan 7, filter 8, and electronic control components can be installed simultaneously into their corresponding cavities before being assembled as a whole, improving assembly efficiency.

[0028] The sealed connection between the first and second base bodies 2a, 2b can optionally be bolted together, with a sealing ring provided on the joint surface between the first and second base bodies 2a, 2b to achieve a seal. Alternatively, the two can be connected by snaps, or snaps can be used in conjunction with bolts. For example, a latching protrusion can be provided on the first base body 2a, and a latching groove can be provided on the second base body 2b. The latching protrusion can be deformed and pressed into the latching groove to achieve a connection between the two. The sealed connection between the second and third base bodies 2b, 2c, can be configured with reference to the first and second base bodies 2a, 2b. In addition to the design of this embodiment, the second cavity 4 can also be configured as a single cavity, with the centrifugal fan 7 and filter element 8 located in the same cavity.

[0029] like Figure 10 and Figure 11As shown, in some embodiments, the second cavity is provided with a strip-shaped opening 11 extending through the inner and outer walls of the second cavity. The front end of the filter element 8 is removably inserted into the strip-shaped opening 11, and the end of the filter element 8 has a sealing structure for sealing the strip-shaped opening 11. The removable insertion of the front end of the filter element 8 into the strip-shaped opening 11 facilitates both installation and replacement and removal. Regarding the sealing structure, a sealing ring can optionally be provided at the end of the filter element 8 to seal the gap between the filter element 8 and the strip-shaped opening 11.

[0030] like Figure 2 、 Figure 4 and Figure 5 As shown, in some embodiments, a wire clamp 12 is mounted on the outer wall of the third base 2c to secure the cables of the electronic control assembly. Two studs are provided on the outer wall of the third base 2c, each with a threaded hole. The cable is placed between the two studs. The wire clamp 12 has a screw hole. The head of the screw passes through the screw hole and is threadedly connected to the threaded hole. The tail of the screw presses the wire clamp 12 against the stud, thereby securing the cable through the wire clamp 12.

[0031] like Figure 3 、 Figure 7 、 Figure 8 and Figure 9 As shown, in some embodiments, regarding how the mounting base 2 is installed on the air conditioner base 1, it is optional that at least one mounting ear 13, preferably two mounting ears 13, is provided on one side of the mounting base 2, and a first through-hole 14 is provided on the mounting ear 13. A screw column is correspondingly provided on the air conditioner base 1, and a first threaded hole 15 is provided on the screw column. A first screw is also included, the head of the first screw passes through the first through-hole 14 and is threadedly engaged with the first threaded hole 15, and the tail of the first screw presses the mounting ear 13. The mounting base 2 itself is provided with at least one latch 16, preferably two latches 16, on the side opposite to the mounting ear 13. A latch hole 17 is correspondingly provided on the air conditioner base 1, and the latch 16 is plugged into the latch hole 17. In addition to this installation method, the mounting base 2 can be directly fixed to the air conditioner base 1 by screws or bolts.

[0032] like Figure 6 、 Figure 10 and Figure 11As shown, in some embodiments, an opening 18 is formed on the side of the first cavity 3. The electronic control assembly includes a main control circuit board 19, which is inserted into the first cavity 3 through the opening 18. Bar-shaped slots 20 are provided on opposite side walls of the first cavity 3. The bar-shaped slots 20 extend along the insertion direction of the main control circuit board 19, and the opposite sides of the main circuit board 19 are respectively inserted into corresponding bar-shaped slots 20. A cover plate 21 is also included. The cover plate 21 is fixedly provided at the opening 18 and can be fixed by snap connection, screw connection, or bolt connection to shield the main control circuit board 19 in the first cavity 3. The bar-shaped slots 20 facilitate the installation and fixation of the main control circuit board 19, and also facilitate the removal of the main circuit board 19 for easy maintenance. In addition to the design of this embodiment, the main circuit board 19 can also be fixed in the first cavity 3 by screws or buckles.

[0033] like Figure 12 and Figure 13 As shown, in some embodiments, a middle frame 22 is further included, which is installed on the air conditioner base 1 and covered on the outside of the mounting base body 2. A avoidance opening corresponding to the opening 18 is opened on the middle frame 22, and the size of the avoidance opening should be slightly larger than the size of the opening 18 so that the cover plate 21 can cooperate with the opening 18. Similarly, the size of the avoidance opening should be slightly larger than the size of the strip opening 11 to facilitate the insertion of the filter element 8 into the strip opening 11. There is a gap between the inner surface of the middle frame 22 and the edge of the opening 18, and a plug 23 is provided on one side of the cover plate 21. The plug 23 extends along the edge of the cover plate 21 and is inserted into the gap between the middle frame 22 and the edge of the opening 18. A second through hole 24 is provided on the side of the cover plate 21 itself opposite to the plug 23, and a second threaded hole 25 is correspondingly provided on the edge of the opening 18 of the first cavity 3. A second screw is also included, and the head of the second screw passes through the second through hole 24 and is threadedly engaged with the second threaded hole 25, and the tail of the second screw presses the cover plate 21 tightly. In this embodiment, a slot is not provided for installing the insert 23. Instead, the natural gap between the middle frame 22 and the edge of the opening 18 is directly used to fix the insert 23 of the cover 21. There is no need to provide a slot on the middle frame 22 or the mounting base 2, which reduces the difficulty of injection molding. The assembly is simplified, and only the insert 23 needs to be inserted into the gap and the cover 21 needs to be locked on one side with a second screw.

Claims

1. A wall-mounted fresh air air conditioner, comprising an air conditioner base (1) and a fresh air component and an electric control component mounted on the air conditioner base (1), characterized in that: The air conditioner further comprises a mounting base (2), the mounting base (2) being mounted on one end of the air conditioner base (1) in the longitudinal direction, the mounting base (2) being provided with a first cavity (3) and a second cavity (4) which are independent of and close to each other along the longitudinal direction of the air conditioner base (1), the electric control component being mounted in the first cavity (3), the fresh air component being mounted in the second cavity (4), the first cavity (3) being provided with a wire inlet hole (5) and a wire outlet hole (6) which pass through the inner wall and the outer wall of the first cavity (3), and the fresh air component being electrically connected to the electric control component.

2. The wall-mounted fresh air air conditioner according to claim 1, characterized in that: Along the direction from the location of the mounting seat body (2) to the other end of the air conditioner base (1), the second cavity (4) and the first cavity (3) are arranged in sequence.

3. The wall-mounted fresh air air conditioner according to claim 1, characterized in that: The fresh air component includes a centrifugal fan (7) and a filter element (8). The second cavity (4) is provided with an air inlet (9) and an air outlet (10) penetrating the inner wall and the outer wall of the second cavity (4). The centrifugal fan (7) and the filter element (8) are sequentially arranged in the second cavity (4). Air enters through the air inlet (9), passes through the centrifugal fan (7) and the filter element (8) in sequence, and is discharged through the air outlet (10).

4. The wall-mounted fresh air air conditioner according to claim 3, characterized in that: The second cavity (4) includes a first cavity and a second cavity that are interconnected. The mounting base (2) includes a first base (2a), a second base (2b) and a third base (2c). The first base (2a) is sealedly connected to the second base (2b). A first cavity is formed between the first base (2a) and the second base (2b). The air inlet (9) is connected to the first cavity. The centrifugal fan (7) is installed in the first cavity. The third base (2c) is sealedly connected to the second base (2b). A second cavity is formed between the second base (2b) and the third base (2c). The filter element (8) is installed in the second cavity. The filter element (8) divides the second cavity into a first area and a second area. The first area is connected to the first cavity, and the second area is connected to the air outlet (10).

5. The wall-mounted fresh air air conditioner according to claim 4, characterized in that: The second cavity is provided with a strip-shaped opening (11) that passes through the inner wall and the outer wall of the second cavity. The front end of the filter element (8) is detachably inserted into the strip-shaped opening (11). The end of the filter element (8) has a sealing structure for sealing the strip-shaped opening (11).

6. The wall-mounted fresh air air conditioner according to claim 4, characterized in that: A wire pressing plate (12) is installed on the outer wall of the third seat body (2c) for fixing the cables of the electric control component.

7. The wall-mounted fresh air air conditioner according to claim 1, characterized in that: At least one mounting ear (13) is provided on one side of the mounting base body (2), and a first through hole (14) is provided on the mounting ear (13); a screw column is correspondingly provided on the air conditioner base (1), and a first threaded hole (15) is provided on the screw column. The first screw is also provided, and the first screw head passes through the first through hole (14) and is threadedly engaged with the first threaded hole (15); the tail of the first screw presses the mounting ear (13); at least one latch (16) is provided on the side of the mounting base body (2) opposite to the mounting ear (13); a latch hole (17) is correspondingly provided on the air conditioner base (1), and the latch (16) is plugged into and engaged with the latch hole (17).

8. The wall-mounted fresh air air conditioner according to claim 1, characterized in that: An opening (18) is provided on the side of the first cavity (3), and the electric control component includes a main control circuit board (19). The main control circuit board (19) is inserted into the first cavity (3) through the opening (18). The first cavity (3) is provided with strip-shaped card slots (20) on opposite side walls thereof. The strip-shaped card slots (20) extend along the insertion direction of the main control circuit board (19). The opposite sides of the main control circuit board (19) are respectively inserted into the corresponding strip-shaped card slots (20). The first cavity (3) also includes a cover plate (21). The cover plate (21) is fixedly provided at the opening (18) and is used to shield the main control circuit board (19) in the first cavity (3).

9. The wall-mounted fresh air air conditioner according to claim 8, characterized in that: The invention also includes a middle frame (22), which is installed on the air conditioner base (1) and is covered on the outside of the mounting base (2). The middle frame (22) is provided with a relief opening corresponding to the opening (18). There is a gap between the inner surface of the middle frame (22) and the edge of the opening (18). One side of the cover plate (21) is provided with an insert (23), which extends along the edge of the cover plate (21) and is inserted into the gap between the middle frame (22) and the edge of the opening (18). A second through hole (24) is provided on the side of the cover plate (21) opposite to the insert (23). A second threaded hole (25) is provided corresponding to the edge of the opening (18) of the first cavity (3). The invention also includes a second screw, the head of the second screw passes through the second through hole (24) and is threadedly matched with the second threaded hole (25), and the tail of the second screw presses the cover plate (21).

Citation Information

Patent Citations

  • Fresh air base and air conditioner

    CN214038664U