Dustproof device for subway air conditioner

Abstract

The dustproof device for the subway air conditioner comprises a carriage top plate, an air conditioning unit, an air return cover, an upper air return filter screen, a lower air return filter screen and an air return grille, and the carriage top plate is provided with an air inlet communicated with the air conditioning unit and an air return duct in a carriage. The outer wall of the air return cover is matched with the inner wall of the air return duct in shape, and the air return cover is detachably mounted on the inner wall of the air return duct; the upper end of the air return cover is provided with an air inlet communicated with an air inlet of the air conditioning unit, and the lower end of the air return cover is provided with an air return opening communicated with the interior of the compartment. The upper air return filter screen is detachably mounted on the air inlet; one side of the air return grille is rotationally arranged on the lower end face of the air return cover and located below the air return opening, and the other opposite side of the air return grille is detachably connected with the air return cover. A lower air return filter screen is detachably arranged on the upper end face of the air return grille. When the air return cover needs to be cleaned, the air return duct can be detached for cleaning, the problem that an existing air return duct cannot be detached for cleaning can be solved, and the cleaning efficiency and the cleaning effect are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioner installation, and particularly relates to a dust-proof device for subway air conditioners. Background Art

[0002] Air conditioning equipment is installed on rail vehicles such as subways. The air return opening of the air conditioning unit of the rail vehicle is arranged at the bottom of the air conditioning unit, and the air return opening inside the vehicle is arranged on the carriage roof plate directly below the air conditioning unit. A closed air return duct needs to be formed between the carriage roof plate and the bottom of the air conditioning unit to connect the air return opening of the air conditioning unit and the air return opening inside the vehicle. After the air conditioner is used for a period of time, maintenance work such as cleaning and replacing the fresh air filter and the air return filter is required. Due to the particularity of the subway, where there are many passengers in the subway carriage, the air flow is frequent, and the ventilation duct needs to be maintained and cleaned frequently, it is necessary to frequently clean and replace the air return filter from inside the vehicle.

[0003] In this regard, the prior art usually needs to design the air return duct into a structure that is convenient for disassembling and installing the filter, such as an air return duct for a rail vehicle disclosed in Patent No. CN109050557 A; or design an air return filter structure that is convenient for disassembling and replacing, such as a filter assembly for the air return window of a bus air conditioner disclosed in Patent No. CN 208827549 U.

[0004] However, in the actual use process, it is found that the cleaning of the air return duct not only lies in replacing the air return filter element, but also requires regular cleaning of the inner wall of the air return duct. Since the air return duct is usually designed as a fixed structure, cleaning can only be carried out through limited inspection openings or ports, and it needs to be cleaned on-site inside the carriage, which is rather inconvenient. Not only is the cleaning efficiency low, but it is also difficult to comprehensively cover all corners inside, and dust and dirt are likely to accumulate in dead corners and inaccessible places, which is prone to breeding bacteria and molds, affecting air quality and system operation efficiency. Especially for some air return ducts equipped with special functional structures such as noise reduction and sterilization, due to their more complex structures, on-site cleaning is more difficult.

[0005] Based on this, it is necessary to research a dust-proof device for subway air conditioners. Content of the Utility Model

[0006] In view of this, the purpose of the utility model is to provide a dust-proof device for subway air conditioners, which can effectively solve the problems of difficult cleaning, low efficiency, and incompleteness existing in the fixed air return ducts in the existing subway carriages.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A dust-proof device for subway air conditioners includes a carriage roof plate and an air conditioning unit. The carriage roof plate is provided with an air return duct, and the air return duct communicates with the air inlet of the air conditioning unit and the interior of the carriage. It also includes an air return cover, an upper air return filter, a lower air return filter, and an air return grille;

[0009] The outer wall of the air return hood is adapted to the inner wall of the air return duct and is detachably installed on the inner wall of the air return duct;

[0010] An air inlet communicating with the air inlet of the air conditioner unit is provided at the upper end of the air return hood, and an air return port communicating with the interior of the carriage is provided at the lower end of the air return hood;

[0011] The upper air return filter screen is detachably installed on the air inlet;

[0012] One side of the air return grille is rotatably arranged on the lower end surface of the air return hood and is located below the air return port, and the opposite side is detachably connected to the air return hood;

[0013] Card slot members are fixedly spaced on the upper end surface of the air return grille, and the two card slot members are U-shaped and have openings facing each other;

[0014] Both side walls of the lower air return filter screen are respectively clamped in the two card slot members, and the card slot members enable the lower air return filter screen to be detachably arranged on the upper end surface of the air return grille.

[0015] Furthermore, clamping plates are fixedly arranged on the left and right inner walls of the air return duct. The clamping plates are located between the outer wall of the air return hood and the inner wall of the air return duct, and clamping openings are provided on the clamping plates;

[0016] A through installation hole is provided on the outer wall of the air return hood, and an elastic buckle is fixedly connected in the installation hole. A hook adapted to the elastic buckle is arranged on one side of the end of the elastic buckle facing the clamping opening, and an unlocking buckle is arranged on the side of the end of the elastic buckle facing away from the clamping opening.

[0017] Furthermore, a triangular reinforcing rib is arranged on the side of the elastic buckle facing the unlocking buckle, and the upper end of the reinforcing rib is connected to the lower end of the unlocking buckle.

[0018] Furthermore, a first sound-absorbing plate is fixedly arranged on the inner wall of the air return duct. The first sound-absorbing plate is located between the outer wall of the air return hood and the inner wall of the air return duct.

[0019] Furthermore, the upper part of the air return duct is simultaneously communicated with two adjacent air inlets. The two air inlets are spaced apart, and a partition is provided between the two air inlets;

[0020] The upper end of the air return hood is adapted to the partition and is detachably connected thereto. Two air inlets are correspondingly provided at the upper end of the air return hood.

[0021] Furthermore, a second sound-absorbing plate is fixedly arranged on the lower end surface of the partition. The second sound-absorbing plate is located between the partition and the air return hood.

[0022] The beneficial effects of the above technical solutions are:

[0023] (1) The outer wall of the air return cover of the present utility model is adapted to the inner wall of the air return duct and is detachably installed on the inner wall of the air return duct. An air inlet communicating with the air inlet of the air conditioner unit is provided at the upper end of the air return cover, and an air return opening communicating with the interior of the carriage is provided at the lower end of the air return cover; by detachably installing a detachable air return cover on the inner wall of the air return duct, the air return cover plays the same functional effect as the air return duct, and dirt in the air will accumulate on the inner wall of the air return cover, avoiding the accumulation of dirt on the inner wall of the air return duct. When it is necessary to clean the air return cover, the air return cover can be removed and cleaned, avoiding the situation where the existing air return duct can only be cleaned on-site, effectively solving the problems of difficult cleaning, low efficiency, and incomplete cleaning of the fixed air return duct in the existing subway carriage, and improving the cleaning efficiency and cleaning effect.

[0024] (2) An upper air return filter screen is detachably installed on the air inlet at the upper end of the air return cover of the present utility model, and the upper air return filter screen mainly plays a secondary filtering role; a return air grille is rotatably arranged on the air return opening at the lower end of the air return cover, and a lower air return filter screen is clamped and installed on the upper end surface of the return air grille. The lower air return filter screen mainly plays a primary filtering role, so that a double filtering structure is formed in the air return cover to ensure effective filtering of dust, particulate matter, and harmful gases in the air; since the lower air return filter screen plays a main filtering role, the lower air return filter screen can be removed and cleaned by opening the return air grille, which can meet the high-frequency replacement requirements in the subway environment; while the upper air return filter screen plays an auxiliary filtering role, and its replacement frequency is much lower than that of the lower air return filter screen, and it can be removed and cleaned together with the air return cover. Moreover, the lower air return filter screen can further improve the air quality and prevent the growth of bacteria by using a filter element with functions such as sterilization, high-efficiency filtration, and air purification. Brief Description of the Drawings

[0025] Figure 1 is a front view schematic diagram of the present utility model;

[0026] Figure 2 is Figure 1 a partial enlarged view of part A in

[0027] Figure 3 is Figure 1 a partial enlarged view of part B in

[0028] Reference Numerals: 1 is the carriage roof panel, 2 is the air conditioner unit, 3 is the air return duct, 4 is the air return cover, 5 is the upper air return filter screen, 6 is the lower air return filter screen, 7 is the return air grille, 8 is the clamping plate, 9 is the elastic buckle, 10 is the first sound insulation board, 11 is the partition part, 12 is the second sound insulation board, 201 is the air inlet, 401 is the installation hole, 701 is the slot member, 801 is the bayonet, 901 is the hook, 902 is the unlocking buckle, 903 is the reinforcing rib. Detailed Description of the Embodiment

[0029] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0030] This embodiment aims to provide a dust-proof device for subway air conditioners, which is mainly used for the return air filtration structure at the top of the subway carriage, aiming at the problems of difficult cleaning, low efficiency and incomplete cleaning existing in the fixed return air duct 3 in the existing subway carriage.

[0031] A dust-proof device for subway air conditioners, as Figure 1 , includes a carriage roof plate 1 and an air conditioner unit 2. The carriage roof plate 1 is provided with a return air duct 3. The return air duct 3 communicates with the air inlet 201 of the air conditioner unit 2 and the interior of the carriage. In this embodiment, the return air duct 3 includes two adjacent air inlets 201. There is a partition 11 between the two air inlets 201. The partition 11 is substantially an inherent structure of the carriage roof plate 1. The two air inlets 201 communicate in the return air duct 3; in other embodiments, it can also be the case of only a single air inlet 201, and in this case, the partition 11 is not included.

[0032] It also includes a return air hood 4, an upper return air filter screen 5, a lower return air filter screen 6 and a return air grille 7; the outer wall of the return air hood 4 is adapted to the inner wall of the return air duct 3 and can be detachably installed on the inner wall of the return air duct 3 to play the role of circulating air instead of the return air hood 4. Clamping plates 8 are fixed on the left and right inner walls of the return air duct 3 by screws. The clamping plates 8 are located between the outer wall of the return air hood 4 and the inner wall of the return air duct 3. A bayonet 801 is provided on the clamping plate 8, which is mainly used for clamping and connecting the return air hood 4. As Figure 2 , a square installation hole 401 penetrating through the left and right is provided on the outer wall of the return air hood 4. An elastic buckle 9 is fixedly connected to the lower side wall of the installation hole 401. A hook 901 adapted to the elastic buckle 9 is provided on one side of the end of the elastic buckle 9 facing the bayonet 801, and an unlocking buckle 902 is provided on the side of the end of the elastic buckle 9 facing away from the bayonet 801; the elastic buckle 9 and the hook 901 are integrally injection-molded and have elasticity themselves, so as to be adapted and clamped with the bayonet 801. The elastic buckle 9 can be installed in the installation hole 401 through connecting pieces such as screws; by inserting the return air hood 4 upward into the return air duct 3, the elastic buckle 9 is clamped in the bayonet 801 to realize the clamping connection between the return air hood 4 and the return air duct 3. When it is necessary to remove the return air hood 4, by inwardly pressing the unlocking buckle 902, the elastic buckle 9 is bent inward, and the hook 901 is disengaged from the bayonet 801 to release the clamping relationship. In other embodiments, other detachable connection methods such as screw connection can also be adopted, aiming to detachably install the return air hood 4 in the return air duct 3.

[0033] The return air hood 4 plays the same functional effect as the return air duct 3. Dirt in the air accumulates on the inner wall of the return air hood 4, preventing dirt from accumulating on the inner wall of the return air duct 3. When the return air hood 4 needs to be cleaned, it can be removed for cleaning, avoiding the situation where the existing return air duct 3 can only be cleaned on-site. This can effectively solve the problems of difficult cleaning, low efficiency, and incomplete cleaning existing in the fixed return air duct 3 in the existing subway carriages, improving the cleaning efficiency and cleaning effect.

[0034] Furthermore, in order to improve the structural strength of the elastic buckle 9, a triangular reinforcing rib 903 is provided on the side of the elastic buckle 9 facing the unlocking buckle 902. The upper end of the reinforcing rib 903 is connected to the lower end of the unlocking buckle 902. The reinforcing rib 903, the elastic buckle 9, and the unlocking buckle 902 are integrally formed structures.

[0035] An air inlet communicating with the air inlet 201 of the air conditioner unit 2 is provided at the upper end of the return air hood 4, and an air return opening communicating with the interior of the carriage is provided at the lower end of the return air hood 4; the upper return air filter 5 is detachably installed on the air inlet, and the detachable method adopts conventional screw connection, aiming to be able to separately remove and clean the upper return air filter 5, and the removal timing can be carried out after the return air hood 4 is completely removed.

[0036] As Figure 3 , one side of the air return grille 7 is rotatably arranged on the lower end surface of the return air hood 4 and is located below the air return opening, and the opposite side is detachably connected to the return air hood 4. The detachable connection method here can adopt screw connection or knob connection to facilitate quick disassembly and assembly. Its specific structure is prior art and will not be elaborated here.

[0037] Card slot members 701 are fixedly spaced on the upper end surface of the air return grille 7. The two card slot members 701 are U-shaped and have openings facing each other; both side walls of the lower return air filter 6 are respectively clamped in the two card slot members 701. The card slot members 701 enable the lower return air filter 6 to be detachably arranged on the upper end surface of the air return grille 7. When the lower return air filter 6 needs to be removed and cleaned, the air return grille 7 can be opened, and the lower return air filter 6 can be taken out from the side of the two card slots, facilitating the removal and replacement of the lower return air filter 6.

[0038] The upper return air filter 5 and the lower return air filter 6 form a double filtration structure to ensure effective filtration of dust, particulate matter, and harmful gases in the air; the lower return air filter 6 plays a major filtering role. The lower return air filter 6 can be removed and cleaned by opening the air return grille 7, which can meet the high-frequency replacement requirements in the subway environment; while the upper return air filter 5 plays an auxiliary filtering role. Since the replacement frequency is much lower than that of the lower return air filter 6, it can be removed and cleaned together with the return air hood 4. And by using a filter element with higher cost and having functions such as sterilization, high-efficiency filtration, and air purification, the air quality can be further improved to prevent bacterial growth.

[0039] Furthermore, as Figure 1 shown, the upper end of the air return hood 4 is adapted in shape to the partition part 11 and is detachably connected. Two air inlets are correspondingly formed at the upper end of the air return hood 4. The detachable connection method can be screw connection or knob connection, aiming to use the partition part 11 to provide an additional support base for the top of the air return hood 4 and reduce the support pressure of the side buckle structure.

[0040] Furthermore, in order to improve the noise reduction ability of the air return structure and reduce the noise transmission of the air conditioner unit 2 in the air return hood 4, a first sound-absorbing plate 10 is fixed to the inner wall of the air return duct 3 by screws. The first sound-absorbing plate 10 is located between the outer wall of the air return hood 4 and the inner wall of the air return duct 3. A second sound-absorbing plate 12 is fixed to the lower end surface of the partition part 11 by screws. The second sound-absorbing plate 12 is located between the partition part 11 and the air return hood 4.

Claims

1. A dust-proof device for a subway air conditioner, comprising a carriage roof panel (1) and an air conditioning unit (2). A return air duct (3) is provided on the carriage roof panel (1), and the return air duct (3) communicates with the air inlet (201) of the air conditioning unit (2) and the interior of the carriage. It is characterized in that: It further includes a return air hood (4), an upper return air filter screen (5), a lower return air filter screen (6) and a return air grille (7); The outer wall of the return air hood (4) is adapted to the inner wall of the return air duct (3) in shape and is detachably installed on the inner wall of the return air duct (3); An air inlet communicating with the air inlet (201) of the air conditioner unit (2) is provided at the upper end of the return air hood (4), and an air return port communicating with the interior of the carriage is provided at the lower end of the return air hood (4); The upper return air filter screen (5) is detachably installed on the air inlet; One side of the return air grille (7) is rotatably arranged on the lower end surface of the return air hood (4) and is located below the air return port, and the opposite side is detachably connected to the return air hood (4); Card slot members (701) are fixedly arranged at intervals on the upper end surface of the return air grille (7), and the two card slot members (701) are U-shaped and have openings facing each other; Both side walls of the lower return air filter screen (6) are respectively clamped in the two card slot members (701), and the card slot members (701) enable the lower return air filter screen (6) to be detachably arranged on the upper end surface of the return air grille (7).

2. The dust-proof device for subway air conditioners according to claim 1, characterized in that: Clamping plates (8) are fixedly arranged on the left and right inner walls of the return air duct (3), the clamping plates (8) are located between the outer wall of the return air hood (4) and the inner wall of the return air duct (3), and clamping openings (801) are provided on the clamping plates (8); A through installation hole (401) is provided on the outer wall of the return air hood (4), an elastic buckle (9) is fixedly connected in the installation hole (401), a hook (901) adapted to the elastic buckle (9) is arranged on one side of the end of the elastic buckle (9) facing the clamping opening (801), and an unlocking buckle (902) is arranged on the side of the end of the elastic buckle (9) facing away from the clamping opening (801).

3. The dust-proof device for subway air conditioners according to claim 2, characterized in that: A triangular reinforcing rib (903) is arranged on the side of the elastic buckle (9) facing the unlocking buckle (902), and the upper end of the reinforcing rib (903) is connected to the lower end of the unlocking buckle (902).

4. A dust-proof device for a subway air conditioner according to claim 1, characterized in that: A first sound absorption plate (10) is fixedly arranged on the inner wall of the return air duct (3), and the first sound absorption plate (10) is located between the outer wall of the return air hood (4) and the inner wall of the return air duct (3).

5. A dust-proof device for a subway air conditioner according to claim 1, characterized in that: The upper part of the return air duct (3) is simultaneously communicated with two adjacent air inlets (201), the two air inlets (201) are arranged at intervals, and a partition part (11) is provided between the two air inlets (201); The upper end of the return air hood (4) is adapted to the partition part (11) in shape and is detachably connected, and two air inlets are correspondingly provided at the upper end of the return air hood (4).

6. The dust-proof device for subway air conditioners according to claim 5, characterized in that: A second sound absorption plate (12) is fixedly arranged on the lower end surface of the partition part (11), and the second sound absorption plate (12) is located between the partition part (11) and the return air hood (4).

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