Return air cover connection structure, cover assembly and air conditioner indoor unit

Abstract

The present invention provides a return air cover plate connection structure, a cover plate assembly, and an air conditioner indoor unit, which relates to the technical field of air conditioner duct indoor units and solves the technical problem of low return air cover plate assembly efficiency in the prior art. The return air cover plate connection structure includes a first bending portion and a second bending portion, wherein one of the first bending portion and the second bending portion is arranged on the cover plate body, and the other of the two is arranged on the return air cover plate. The first bending portion and the second bending portion have the same bending direction, and the second bending portion can be inserted into the bending gap of the first bending portion to connect the return air cover plate to the cover plate body. The installation process is simple and convenient, which improves the assembly efficiency between the return air cover plate and the cover plate body of the air conditioner indoor unit. When it is necessary to switch the return air mode of the air conditioner indoor unit, the setting of the return air cover plate connection structure makes the switching assembly process simple and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of air duct indoor units of air conditioners, and in particular to a return air cover plate connection structure, a cover plate assembly and an air conditioner indoor unit. Background Art

[0002] The indoor unit housing of existing ducted air conditioners is usually made of sheet metal, mainly composed of the cover body (upper cover and lower cover) and the return cover. Depending on the project installation situation, there are two return air installation methods: rear return air and bottom return air. Therefore, the upper cover is a whole structure, and the lower cover is divided into the bottom cover and the return air cover. When rear return air is required, the return air cover covers the bottom return air outlet. When bottom return air is required, the return air cover covers the rear return air outlet to achieve different return air methods. Existing return air cover generally adopts the following two assembly methods:

[0003] (1) The return air cover is fixed with screws, which has low assembly efficiency, especially for models with longer lengths, where more screws are needed.

[0004] (2) The return air cover is fixed with screws on one side and clips on the other side. Figure 1 As shown, patent number CN201320030582.9 discloses a return air cover that can be used for rear and lower return air. However, the five clips at the front section of the assembly of this return air cover cooperate with the corresponding clip holes. The notch-shaped structure causes the overall strength of the return air cover to be low, and all five clips need to be installed correctly, affecting the assembly efficiency. Summary of the Invention

[0005] The present invention aims to provide a return air cover plate connection structure, a cover plate assembly, and an air conditioner indoor unit to address the technical problem of low return air cover plate assembly efficiency in the prior art. The various technical effects achieved by the preferred technical solution among the various technical solutions provided by the present invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The return air cover connection structure provided by the present invention includes a first bending portion and a second bending portion, wherein one of the first bending portion and the second bending portion is arranged on the cover body, and the other one is arranged on the return air cover, the first bending portion and the second bending portion have the same bending direction, and the second bending portion can be inserted into the bending gap of the first bending portion to connect the return air cover to the cover body.

[0008] Furthermore, the first bending portion includes a first bending section and a second bending section, the second bending section is connected to the cover body or the return air cover through the first bending section, and the bending gap between the first bending section and the second bending section forms an assembly part.

[0009] Furthermore, a bending angle between the first bending section and the second bending section is 20° to 45°.

[0010] Furthermore, the second bending portion includes a third bending section and a fourth bending section, the fourth bending section is connected to the cover body or the return air cover through the third bending section, the third bending section and the fourth bending section form an insertion portion, and the third bending section and the first bending section are in a fitting state, and the fourth bending section and the second bending section are in a fitting state.

[0011] Furthermore, a bending angle between the third bending segment and the fourth bending segment is not less than a bending angle between the first bending segment and the second bending segment.

[0012] Furthermore, a bending angle between the third bending segment and the fourth bending segment is 0-10° greater than a bending angle between the first bending segment and the second bending segment.

[0013] Furthermore, the first bending portion is formed by bending the return air cover, and the second bending portion is formed by bending the cover body.

[0014] Furthermore, there are a first side and a second side arranged opposite to each other on the return air cover, the edge of the first side is bent toward the direction close to the second side to form the first bending section, and the second bending section is a folded edge connected to the first bending section and bent from the first bending section toward the direction away from the second side.

[0015] Furthermore, the first bending portion and the second bending portion are both V-shaped.

[0016] Furthermore, a first arc-shaped bending connection portion is formed between the first bending segment and the second bending segment, and a second arc-shaped bending connection portion is formed between the third bending segment and the fourth bending segment.

[0017] Furthermore, reinforcement structures are provided on the inner surfaces of the first arc-shaped bending connection portion and the second arc-shaped bending connection portion.

[0018] The present invention also provides a cover plate assembly, comprising a cover plate body, a return air cover plate and the above-mentioned return air cover plate connecting structure, wherein the return air cover plate and the cover plate body are connected via the return air cover plate connecting structure.

[0019] Furthermore, the cover plate body includes an upper cover plate and a lower cover plate, and one of the first bending portion and the second bending portion is arranged on the upper cover plate and the lower cover plate, and the other one of the first bending portion is arranged on the return air cover plate.

[0020] Furthermore, a first bending portion is formed on the return air cover plate, and a second bending portion is formed on both the upper cover plate and the lower cover plate.

[0021] Furthermore, the cover plate body also includes a side cover plate, and there are a first side and a second side relatively arranged on the return air cover plate. The first side of the return air cover plate is connected to the upper cover plate or the lower cover plate through the return air cover plate connection structure, and the second side of the return air cover plate is detachably connected to the side cover plate through a fixing member.

[0022] Furthermore, both ends of the second side of the return air cover are connected to the side cover through the fixing member.

[0023] Furthermore, the return air cover is provided with the first bending portion along the length direction of the first side thereof, and the length of the first bending portion is equal to the length of the first side.

[0024] Furthermore, a mounting guide portion is provided on a side of the return air cover plate that is perpendicular to the first side or the second side, and an assembly hole that matches the mounting guide portion is provided on the side cover plate.

[0025] The present invention also provides an air-conditioning indoor unit, characterized in that it includes the above-mentioned cover plate assembly.

[0026] Furthermore, the air-conditioning indoor unit is a duct-type air-conditioning indoor unit.

[0027] The return air cover plate connection structure provided by the present invention includes a first bent portion and a second bent portion, wherein one of the first bent portion and the second bent portion is provided on the cover plate body, and the other is provided on the return air cover plate. The first bent portion and the second bent portion have the same bending direction, and the second bent portion can be inserted into the bending gap of the first bent portion to connect the return air cover plate to the cover plate body. The installation process is simple and convenient, and the efficiency of the assembly between the return air cover plate and the cover plate body of the air conditioner indoor unit is improved. When it is necessary to switch the return air mode of the air conditioner indoor unit, the provision of the return air cover plate connection structure makes the switching assembly process simple and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 It is a structural diagram of a duct-type air conditioner indoor unit in the prior art;

[0030] Figure 2 This is a structural diagram of the rear return air of the indoor unit of the duct-type air conditioner provided by an embodiment of the present invention;

[0031] Figure 3 This is a schematic structural diagram of the bottom return air of the indoor unit of the duct-type air conditioner provided by an embodiment of the present invention;

[0032] Figure 4 Schematic diagram of the structure of the return air cover provided by an embodiment of the present invention;

[0033] Figure 5 is a side view of a return air cover provided by an embodiment of the present invention;

[0034] Figure 6 yes Figure 5 Enlarged view of part A;

[0035] Figure 7 A schematic cross-sectional view of a duct-type air conditioner indoor unit (rear return air) provided in an embodiment of the present invention;

[0036] Figure 8 yes Figure 7 Enlarged view of part B;

[0037] Figure 9 A cross-sectional schematic diagram of a duct-type air conditioner indoor unit provided by an embodiment of the present invention (downward return air);

[0038] Figure 10 yes Figure 9 Magnified view of part C.

[0039] Figure markings: 1. First bending portion; 11. First bending section; 12. Second bending section; 13. First arc-shaped bending connection portion; 2. Second bending portion; 21. Third bending section; 22. Fourth bending section; 23. Second arc-shaped bending connection portion; 3. Return air cover; 4. Cover body; 41. Upper cover; 42. Lower cover; 43. Side cover; 5. Installation guide; 6. Assembly hole; 7. Rear return air outlet; 8. Lower return air outlet; 9. Fixing part. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0041] See also Figures 2 to 10 The present invention provides a return air cover plate connection structure, including a first bending portion 1 and a second bending portion 2, wherein one of the first bending portion 1 and the second bending portion 2 is arranged on the cover plate body 4, and the other one of the two is arranged on the return air cover plate 3, the first bending portion 1 and the second bending portion 2 have the same bending direction, and the second bending portion 2 can be inserted into the bending gap of the first bending portion 1 to connect the return air cover plate 3 to the cover plate body 4.

[0042] like Figure 2 As shown, when rear return air is needed, the return air cover 3 covers the lower return air outlet 8; Figure 3 As shown, when downward return air is required, the return air cover 3 covers the rear return air port 7 to achieve different return air modes. When the return air mode of the air conditioner indoor unit needs to be switched, the setting of the return air cover connection structure makes the switching assembly process simple and efficient.

[0043] Specific, combined Figure 5 and Figure 6 As shown, the first bending portion 1 includes a first bending section 11 and a second bending section 12. The second bending section 12 is connected to the cover body 4 or the return air cover 3 through the first bending section 11. The bending gap between the first bending section 11 and the second bending section 12 forms an assembly part.

[0044] See also Figure 8 and Figure 10 The second bending portion 2 includes a third bending section 21 and a fourth bending section 22. The fourth bending section 22 is connected to the cover body 4 or the return air cover 3 through the third bending section 21. The third bending section 21 and the fourth bending section 22 form an insertion portion, and the third bending section 21 and the first bending section 11 are in a fitted state, and the fourth bending section 22 and the second bending section 12 are in a fitted state.

[0045] In this embodiment, the bending angle α between the first bending section 11 and the second bending section 12 is an acute angle, preferably 20°≤α≤45°. Generally, the bending angle between the third bending section 21 and the fourth bending section 22 is consistent with the bending angle between the first bending section 11 and the second bending section 12. However, to ensure a more stable connection structure of the return air cover and prevent loosening and abnormal noise, the bending angle between the third bending section 21 and the fourth bending section 22 is required to be greater than the bending angle between the first bending section 11 and the second bending section 12.

[0046] Optionally, the bending angle between the third bending section 21 and the fourth bending section 22 in this embodiment is 0 to 10° larger than the bending angle between the first bending section 11 and the second bending section 12. When the return air cover 3 and the cover body 4 are installed, the second bending portion 2 needs to be forcefully inserted into the bending gap between the first bending section 11 and the second bending section 12 to ensure an interference fit, thereby improving the stability of the connection between the return air cover 3 and the cover body 4.

[0047] Specifically, in this embodiment, the first bent portion 1 is formed by bending the return air cover 3, and the second bent portion 2 is formed by bending the cover body 4 (lower cover 42 or upper cover 41). The return air cover 3 has a first side and a second side disposed opposite each other. The edge of the first side is bent toward the second side to form a first bent section 11. The second bent section 12 is connected to the first bent section 11 and bends away from the first bent section 11. The bending profile of the second bent portion 2 on the cover body 4 is the same as that of the return air cover 3, both forming a "V" shape.

[0048] In this embodiment, a first curved connecting portion 13 is formed between the first curved segment 11 and the second curved segment 12, and a second curved connecting portion 23 is formed between the third curved segment 21 and the fourth curved segment 22. Reinforcement structures such as profiles or ribs can be appropriately added to the inner surfaces of the first curved connecting portion 13 and the second curved connecting portion 23 to increase the strength of the return air cover connection structure.

[0049] In addition, the present invention also provides a cover assembly, which forms the indoor unit shell of the air conditioner indoor unit, including a cover body 4, a return air cover 3 and the above-mentioned return air cover connection structure, and the return air cover 3 and the cover body 4 can form a detachable connection through the return air cover connection structure.

[0050] Specifically in this embodiment, the cover body 4 includes an upper cover 41 and a lower cover 42 , and one of the first bending portion 1 and the second bending portion 2 is disposed on the upper cover 41 and the lower cover 42 , while the other is disposed on the return air cover 3 .

[0051] As an optional implementation method of the embodiment of the present invention, a first bending portion 1 is formed on the return air cover 3, and a second bending portion 2 is formed on both the upper cover 41 and the lower cover 42. The cover body 4 in this embodiment also includes a side cover 43, and there are a first side and a second side arranged opposite to each other on the return air cover 3. The first side of the return air cover 3 is connected to the upper cover 41 or the lower cover 42 through the return air cover connection structure. Compared with the return air cover 3 in the prior art that is only fixed and installed with screws, the installation process is simple and convenient, and the efficiency of indoor unit housing assembly is improved. In addition, the return air cover 3 is provided with a first bending portion 1 along the length direction of its first side, and the length of the first bending portion 1 is equal to the length of the first side, which improves the installation strength of the return air cover 3 and avoids the problem that multiple clips need to be installed correctly, thereby improving assembly efficiency.

[0052] The bending angle between the third bending section 21 and the fourth bending section 22 of the second bending portion 2 formed on the lower cover plate 42 is β, and the bending angle between the third bending section 21 and the fourth bending section 22 of the second bending portion 2 formed on the upper cover plate 41 is γ. Both β and γ are 0 to 10° larger than the bending angle α between the first bending section 11 and the second bending section 12. When the return air cover plate 3 is installed with the cover plate body 4, the second bending section 2 needs to be forcefully inserted into the bending gap between the first bending section 11 and the second bending section 12 to achieve an interference fit, thereby improving the stability of the connection between the return air cover plate 3 and the cover plate body 4.

[0053] In order to make the position of the return air cover 3 relative to the upper cover 41 or the lower cover 42 more accurate and less likely to loosen, Figure 4 As shown, the second side of the return air cover 3 of this embodiment is detachably connected to the side cover 43 via a fixing member 9. Specifically, the fixing member 9 is a screw. The first side of the return air cover 3 is connected to the upper cover 41 or the lower cover 42 via the return air cover connection structure, and the second side of the return air cover 3 is connected to the side cover 43 via a screw. When it is necessary to switch the return air mode of the air-conditioning indoor unit, the setting of the return air cover connection structure in this embodiment makes the switching assembly process simple and efficient. In addition, the second side of the return air cover 3 is connected to the side cover 43 by screws, which effectively ensures that the position of the return air cover 3 on the indoor unit casing is more precise and the connection is more stable.

[0054] As can be seen from the above, the cover assembly of this embodiment, through the coordinated use of the fixing member 9 and the return air cover connecting structure, not only improves the assembly efficiency of the indoor unit casing, but also effectively ensures that the return air cover 3 is not easy to loosen relative to the cover body 4.

[0055] Preferably, both ends of the second side of the return air cover plate 3 are connected to the side cover plate 43 via fixing members 9. Connecting both ends of the second side of the return air cover plate 3 to the cover plate body 4 via fixing members 9 allows the return air cover plate 3 to be more firmly mounted on the cover plate body 4, making assembly more convenient.

[0056] More preferably, in order to better connect the second side of the return air cover plate 3 with the side cover plate 43 , an assembly fold is provided on the second side of the return air cover plate 3 . The fixing member 9 is used to connect the assembly fold and the side cover plate 43 .

[0057] An installation guide portion 5 is provided on the side of the return air cover 3 that is perpendicular to the first side or the second side, and an assembly hole 6 that cooperates with the installation guide portion 5 is provided on the side cover 43. The assembly hole 6 in this embodiment is specifically a groove opened at the bottom and side of the side cover 43.

[0058] The return air cover plate 3 and the first bending part 1, the lower cover plate 42 and the second bending part 2, and the upper cover plate 41 and the second bending part 2 in the present invention all adopt an integrated folding edge snap-in design, which is higher in strength and assembly efficiency than that of the return air cover plate 3 in the prior art.

[0059] In addition, the present invention also provides an air-conditioning indoor unit, comprising the above-mentioned cover plate assembly.

[0060] As an optional implementation manner of the embodiment of the present invention, the air-conditioning indoor unit is a duct-type air-conditioning indoor unit.

[0061] like Figure 2 As shown, when the first bend 1 on the return air cover 3 is matched with the second bend 2 provided on the lower cover 42, the return air cover 3 is set at the first position of the indoor unit housing. At this time, the return air cover 3 is located at the lower part of the indoor unit housing, and the return air mode of the air conditioner indoor unit is rear return air. Figure 3 As shown, when the first bend 1 on the return air cover 3 is engaged with the second bend 2 provided on the rear cover, the return air cover 3 is located in the second position of the indoor unit housing. In this case, the return air cover 3 is located at the rear of the indoor unit housing, and the return air mode of the air conditioner indoor unit is downward return air.

[0062] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A return air cover connection structure, characterized in that: The invention comprises a first bending portion and a second bending portion, wherein one of the first bending portion and the second bending portion is provided on the cover plate body, and the other of the first bending portion and the second bending portion is provided on the return air cover plate, the first bending portion and the second bending portion have the same bending direction, and the second bending portion can be inserted into the bending gap of the first bending portion to connect the return air cover plate to the cover plate body; The first bending portion includes a first bending section and a second bending section, the second bending section is connected to the cover plate body or the return air cover plate through the first bending section, and the bending gap between the first bending section and the second bending section forms an assembly portion; The bending angle between the first bending section and the second bending section is 20° to 45°; The second bending portion includes a third bending section and a fourth bending section. The fourth bending section is connected to the cover body or the return air cover through the third bending section. The third bending section and the fourth bending section form an insertion portion, and the third bending section and the first bending section are in a fitted state, and the fourth bending section and the second bending section are in a fitted state.

2. The return air cover plate connection structure according to claim 1, characterized in that: The bending angle between the third bending segment and the fourth bending segment is not less than the bending angle between the first bending segment and the second bending segment.

3. The return air cover plate connection structure according to claim 1 or 2, characterized in that: The bending angle between the third bending segment and the fourth bending segment is 0-10° greater than the bending angle between the first bending segment and the second bending segment.

4. The return air cover plate connection structure according to claim 1, characterized in that: The first bending portion is formed by bending the return air cover, and the second bending portion is formed by bending the cover body.

5. The return air cover plate connection structure according to claim 4, characterized in that: There are a first side and a second side arranged opposite to each other on the return air cover plate, the edge of the first side is bent toward the direction close to the second side to form the first bending section, and the second bending section is a folded edge connected to the first bending section and bent from the first bending section toward the direction away from the second side.

6. The return air cover plate connection structure according to claim 1, characterized in that: The first bending portion and the second bending portion are both "V"-shaped.

7. The return air cover plate connection structure according to claim 1, characterized in that: A first arc-shaped bending connection portion is formed between the first bending segment and the second bending segment, and a second arc-shaped bending connection portion is formed between the third bending segment and the fourth bending segment.

8. The return air cover plate connection structure according to claim 7, characterized in that: Reinforcement structures are provided on the inner surfaces of the first arc-shaped bending connection portion and the second arc-shaped bending connection portion.

9. A cover plate assembly, characterized in that: It comprises a cover plate body, a return air cover plate and the return air cover plate connection structure according to any one of claims 1 to 8, wherein the return air cover plate and the cover plate body are connected via the return air cover plate connection structure.

10. The cover plate assembly according to claim 9, wherein: The cover plate body includes an upper cover plate and a lower cover plate, and one of the first bending portion and the second bending portion is arranged on the upper cover plate and the lower cover plate, and the other one of the first bending portion is arranged on the return air cover plate.

11. The cover plate assembly according to claim 10, wherein: A first bending portion is formed on the return air cover plate, and a second bending portion is formed on both the upper cover plate and the lower cover plate.

12. The cover plate assembly according to claim 11, wherein: The cover plate body also includes a side cover plate, and the return air cover plate has a first side and a second side arranged opposite to each other. The first side of the return air cover plate is connected to the upper cover plate or the lower cover plate through the return air cover plate connection structure, and the second side of the return air cover plate is detachably connected to the side cover plate through a fixing member.

13. The cover plate assembly according to claim 12, wherein: Both ends of the second side of the return air cover are connected to the side cover through the fixing member.

14. The cover plate assembly according to claim 12, wherein: The return air cover is provided with the first bending portion along the length direction of the first side thereof, and the length of the first bending portion is equal to the length of the first side.

15. The cover plate assembly according to claim 12, wherein: A mounting guide portion is provided on a side of the return air cover plate that is perpendicular to the first side or the second side, and an assembly hole that matches the mounting guide portion is provided on the side cover plate.

16. An air conditioner indoor unit, characterized in that: The cover plate assembly comprises the cover plate assembly according to any one of claims 9 to 15.

17. The air conditioner indoor unit according to claim 16, wherein: The air-conditioning indoor unit is a duct-type air-conditioning indoor unit.

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