Return air inlet structure for central air conditioning system

Abstract

The utility model discloses a return air inlet structure for a central air-conditioning system, which relates to the technical field of central air conditioners and comprises a return air inlet frame, a first sliding plate is slidably arranged on the inner side of the return air inlet frame, the side surface of the first sliding plate is rotatably connected with a concentric-square-shaped frame, and a plurality of guide sheets are mounted on the inner side of the concentric-square-shaped frame. A filter screen is movably connected to the inner side of the concentric-square-shaped frame, a fixing groove is formed in the side face of the concentric-square-shaped frame, and a locking assembly is arranged on the first sliding plate and comprises a second sliding plate arranged on the inner side of the first sliding plate in a sliding mode, a fixing rod installed on the side face of the second sliding plate and a telescopic block arranged on the inner side of the first sliding plate in a sliding mode. According to the utility model, the filter screen can be quickly taken down and replaced, and excessive peripheral parts of the return air inlet frame do not need to be disassembled, so that the operation process is greatly simplified, the operation efficiency is improved, and the operation difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of central air conditioning technology, and in particular to a return air vent structure for a central air conditioning system. Background Technology

[0002] The return air vent of a central air conditioning system is an important channel for indoor air to return to the air conditioning unit. Its structure generally consists of components such as a return air vent frame, filter screen, and guide vanes. The return air vent frame serves as the supporting structure for the return air vent, fixing other components and ensuring a stable connection between the return air vent and the building's decorative surfaces (such as ceilings and walls). The filter screen is used to filter dust, particulate matter, and other impurities in the air, preventing them from entering the air conditioning unit and protecting the normal operation of the unit's internal equipment (such as fans and heat exchangers). The guide vanes guide the return airflow evenly into the return air vent, reducing airflow noise and improving airflow efficiency.

[0003] After prolonged use, the return air vent structure will accumulate a lot of impurities on the filter screen, which needs to be removed and replaced or cleaned. However, removing and replacing the filter screen may require disassembling a large number of surrounding parts, involving the disassembly and installation of multiple screws, clips, etc., which is a cumbersome operation. Therefore, a return air vent structure for central air conditioning systems is proposed. Utility Model Content

[0004] The purpose of this utility model is to solve the shortcomings of the existing technology, which may require the disassembly of a large number of peripheral parts, involving the disassembly and installation of multiple screws, clips, etc., and the operation steps are cumbersome. Therefore, a return air vent structure for a central air conditioning system is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A return air vent structure for a central air conditioning system includes a return air vent frame. A first sliding plate is slidably disposed on the inner side of the return air vent frame. A U-shaped frame is rotatably connected to the side of the first sliding plate. Multiple guide plates are installed on the inner side of the U-shaped frame. A filter screen is movably connected to the inner side of the U-shaped frame. A fixing groove is formed on the side of the U-shaped frame. A locking assembly is provided on the first sliding plate. The locking assembly includes a second sliding plate slidably disposed on the inner side of the first sliding plate, a fixing rod installed on the side of the second sliding plate, and a telescopic block slidably disposed on the inner side of the first sliding plate. The return air... The side of the air inlet frame is symmetrically connected to baffles. Rotating the two baffles engages the limiting position of the loop frame. The first sliding plate moves the filter screen inside the loop frame to the outside of the air inlet frame. Rotating the loop frame ninety degrees moves the filter screen to the side of the loop frame away from the air inlet frame. Pulling the second sliding plate moves the fixing rod into the fixing groove and locks the loop frame. The telescopic block limits the second sliding plate, allowing for quick removal and replacement of the filter screen without disassembling too many peripheral parts of the air inlet frame. This greatly simplifies the operation process, improves operational efficiency, and reduces operational difficulty.

[0007] The above technical solution further includes:

[0008] The return air vent frame has a first sliding groove on its inner side. The first sliding plate is slidably disposed on the inner side of the first sliding groove. A first guide rod is installed on the inner side of the first sliding groove. The first guide rod is slidably connected to the first sliding plate. A first spring is installed on the side of the first sliding plate. The end of the first spring away from the first sliding plate is fixedly connected to the side wall of the first sliding groove. The first sliding plate moves along the first sliding groove with the support of the first guide rod.

[0009] The inner side of the spiral frame has a circular groove, and a circular rod is installed on the side of the first sliding plate. The circular rod is rotatably connected to the spiral frame, and a first torsion spring is installed on the outer side of the circular rod. The first torsion spring is fixedly connected to the inner wall of the circular groove. When the spiral frame rotates around the circular rod, the first torsion spring contracts.

[0010] A first loop plate is installed on the inner side of the loop frame, and a second magnet is installed on the inner side of the first loop plate. A first magnet is installed on the inner side of the filter screen. The first magnet and the second magnet attract each other, so that the filter screen is no longer attracted by the first magnet and the second magnet, and the filter screen can be quickly removed.

[0011] A second spiral plate is installed on the inner side of the return air vent frame, and the second spiral plate is in contact with the filter screen.

[0012] A second spring and a second guide rod are respectively installed on the inner side of the first sliding plate. The second guide rod is slidably connected to the second sliding plate, and the end of the second spring away from the loop frame is fixedly connected to the second sliding plate.

[0013] The first sliding plate has an opening groove on its inner side, and a third spring is installed on the inner side of the opening groove. The end of the third spring is fixedly connected to the telescopic block, and the telescopic block is slidably connected to the opening groove. The cross-section of the telescopic block is trapezoidal, and the inclined surface of the telescopic block is on the movement trajectory of the second sliding plate. The second sliding plate can be limited by the telescopic block.

[0014] The inner side of the return air vent frame is symmetrically connected to a rotating rod, which is fixedly connected to a baffle. A second torsion spring is installed at the end of the baffle near the return air vent frame, and the end of the second torsion spring away from the baffle is fixedly connected to the inner wall of the return air vent frame. The baffle limits and locks the U-shaped frame.

[0015] This utility model has the following beneficial effects:

[0016] In this invention, when it is necessary to remove the filter screen, the U-shaped frame is moved to the outside of the return air vent frame, and then the filter screen is placed on the side of the U-shaped frame away from the return air vent frame. After that, the filter screen can be quickly removed and replaced without disassembling too many peripheral parts of the return air vent frame, which greatly simplifies the operation process, improves the operation efficiency, and reduces the operation difficulty. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a return air vent structure for a central air conditioning system proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of the overall side sectional structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the loop-shaped frame structure in this utility model;

[0020] Figure 4 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0021] Figure 5 for Figure 2 Enlarged schematic diagram of the structure at point B;

[0022] Figure 6 for Figure 5 Enlarged schematic diagram of the structure at point C;

[0023] Figure 7 for Figure 2 Enlarged schematic diagram of the structure at point D;

[0024] Figure 8 for Figure 2 Enlarged schematic diagram of the structure at point E in the middle;

[0025] Figure 9 for Figure 2 Enlarged schematic diagram of the structure at point F.

[0026] In the diagram: 1. Return air vent frame; 2. First sliding groove; 3. First sliding plate; 4. First spring; 5. First guide rod; 6. U-shaped frame; 7. Guide plate; 8. Filter screen; 9. First magnet; 10. First U-shaped plate; 11. Second magnet; 12. Second U-shaped plate; 13. Round rod; 14. First torsion spring; 15. Circular groove; 16. Second sliding plate; 17. Fixed rod; 18. Second spring; 19. Second guide rod; 20. Opening groove; 21. Third spring; 22. Telescopic block; 23. Fixed groove; 24. Rotating rod; 25. Baffle; 26. Second torsion spring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figure 1 - Figure 9 As shown, this utility model proposes a return air vent structure for a central air conditioning system, including a return air vent frame 1. A first sliding plate 3 is slidably disposed on the inner side of the return air vent frame 1. A U-shaped frame 6 is rotatably connected to the side of the first sliding plate 3. Multiple guide plates 7 are installed on the inner side of the U-shaped frame 6. A filter screen 8 is movably connected to the inner side of the U-shaped frame 6. A fixing groove 23 is opened on the side of the U-shaped frame 6. A locking component is provided on the first sliding plate 3. The locking component includes a second sliding plate 16 slidably disposed on the inner side of the first sliding plate 3, a fixing rod 17 installed on the side of the second sliding plate 16, and a telescopic block 22 slidably disposed on the inner side of the first sliding plate 3. The side of the return air vent frame 1 is symmetrically connected to a baffle 25. Rotating the two baffles 25 releases the restriction on the loop frame 6. The first sliding plate 3 drives the filter screen 8 inside the loop frame 6 to move to the outside of the return air vent frame 1. Rotating the loop frame 6 ninety degrees makes the filter screen 8 rotate to the side of the loop frame 6 away from the return air vent frame 1. Pulling the second sliding plate 16 drives the fixing rod 17 to insert into the fixing groove 23 and lock the loop frame 6. The telescopic block 22 limits the second sliding plate 16. The filter screen 8 can be quickly removed and replaced without disassembling too many peripheral parts of the return air vent frame 1, which greatly simplifies the operation process, improves the operation efficiency, and reduces the operation difficulty.

[0029] The inner side of the return air vent frame 1 is provided with a first sliding groove 2, and a first sliding plate 3 is slidably disposed inside the first sliding groove 2. A first guide rod 5 is installed inside the first sliding groove 2, and the first guide rod 5 is slidably connected to the first sliding plate 3. A first spring 4 is installed on the side of the first sliding plate 3, and the end of the first spring 4 away from the first sliding plate 3 is fixedly connected to the side wall of the first sliding groove 2. The first sliding plate 3 moves along the first sliding groove 2 with the support of the first guide rod 5.

[0030] A circular groove 15 is provided on the inner side of the herringbone frame 6. A circular rod 13 is installed on the side of the first sliding plate 3. The circular rod 13 is rotatably connected to the herringbone frame 6. A first torsion spring 14 is installed on the outer side of the circular rod 13. The first torsion spring 14 is fixedly connected to the inner wall of the circular groove 15. When the herringbone frame 6 rotates around the circular rod 13, the first torsion spring 14 retracts.

[0031] A first loop plate 10 is installed on the inner side of the loop frame 6, and a second magnet 11 is installed on the inner side of the first loop plate 10. A first magnet 9 is installed on the inner side of the filter screen 8. The first magnet 9 and the second magnet 11 attract each other, so that the filter screen 8 is no longer attracted by the first magnet 9 and the second magnet 11, and the filter screen 8 can be quickly removed.

[0032] A second spiral plate 12 is installed on the inner side of the return air vent frame 1, and the second spiral plate 12 is in contact with the filter screen 8.

[0033] A second spring 18 and a second guide rod 19 are respectively installed on the inner side of the first sliding plate 3. The second guide rod 19 is slidably connected to the second sliding plate 16, and the end of the second spring 18 away from the loop frame 6 is fixedly connected to the second sliding plate 16.

[0034] The inner side of the first sliding plate 3 is provided with an opening groove 20, and a third spring 21 is installed on the inner side of the opening groove 20. The end of the third spring 21 is fixedly connected to the telescopic block 22. The telescopic block 22 is slidably connected to the opening groove 20. The cross section of the telescopic block 22 is trapezoidal, and the inclined surface of the telescopic block 22 is on the movement trajectory of the second sliding plate 16. The second sliding plate 16 can be limited by the telescopic block 22.

[0035] A rotating rod 24 is symmetrically rotatably connected to the inner side of the return air vent frame 1. The rotating rod 24 is fixedly connected to the baffle 25. A second torsion spring 26 is installed at the end of the baffle 25 near the return air vent frame 1. The end of the second torsion spring 26 away from the baffle 25 is fixedly connected to the inner wall of the return air vent frame 1. The baffle 25 limits and locks the U-shaped frame 6.

[0036] In this embodiment, when the filter screen 8 needs to be removed for cleaning, the two baffles 25 can be rotated, simultaneously rotating the rotating rod 24. At this time, the second torsion spring 26 retracts, rotating the two baffles 25 by ninety degrees so that they no longer limit the U-shaped frame 6. The first spring 4, in the retracted state, drives the first sliding plate 3 to reset, causing the first sliding plate 3 to move along the first sliding groove 2 with the support of the first guide rod 5. At the same time, it drives the U-shaped frame 6 to move to the outside of the return air vent frame 1, and simultaneously drives the filter screen 8 to move. At this time, the filter screen 8 is no longer in contact with the air vent frame 1. When the second loop plate 12 contacts, the loop frame 6 rotates around the round rod 13. At this time, the first torsion spring 14 retracts, rotating the loop frame 6 180 degrees so that the filter screen 8 is on the side of the loop frame 6 away from the return air vent frame 1. At this time, the second sliding plate 16 can be pulled, causing the second sliding plate 16 to move along the second guide rod 19. At the same time, the fixing rod 17 is driven to insert into the fixing groove 23 to lock the loop frame 6. At this time, the second spring 18 retracts, and the second sliding plate 16 moves to the inclined surface of the compression telescopic block 22, while driving the telescopic block 22 to retract. When block 22 retracts into the inner side of opening slot 20, the third spring 21 retracts. When the second sliding plate 16 moves to the other side of telescopic block 22, the third spring 21, which is in a retracted state, resets, simultaneously driving telescopic block 22 to reset and limiting the second sliding plate 16, keeping the fixing rod 17 inserted into the fixing slot 23. Then, the filter screen 8 can be pulled, so that the filter screen 8 is no longer attracted to the second magnet 11 through the first magnet 9, thereby quickly removing the filter screen 8. After replacing the filter screen 8, the filter screen 8 is passed through the first magnet 9. 9 continues to attract the second magnet 11, and then pulls the telescopic block 22 so that the telescopic block 22 no longer limits the second sliding plate 16. At this time, the second spring 18, which is in the contracted state, drives the second sliding plate 16 to reset, so that the fixing rod 17 moves to the outside of the fixing groove 23 and no longer locks the loop frame 6. The first torsion spring 14, which is in the contracted state, drives the loop frame 6 to reset. At the same time, the first spring 4, which is in the contracted state, drives the first sliding plate 3 to reset, thereby driving the loop frame 6 to move to the inside of the return air vent frame 1. Finally, the loop frame 6 is locked by the baffle 25.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A return air inlet structure for a central air conditioning system, comprising a return air inlet frame (1), characterized in that, The inner side of the return air inlet frame (1) is slidably provided with a first sliding plate (3), the side of the first sliding plate (3) is rotatably connected with a return-shaped frame (6), the inner side of the return-shaped frame (6) is provided with a plurality of guide pieces (7), the inner side of the return-shaped frame (6) is movably connected with a filter screen (8), the side of the return-shaped frame (6) is provided with a fixed groove (23), the first sliding plate (3) is provided with a locking assembly, the locking assembly comprises a second sliding plate (16) slidably arranged on the inner side of the first sliding plate (3), a fixed rod (17) mounted on the side of the second sliding plate (16), and a telescopic block (22) slidably arranged on the inner side of the first sliding plate (3), the side of the return air inlet frame (1) is rotatably connected with a baffle (25), and the two baffles (25) are rotatable to limit the return-shaped frame (6). The first sliding plate (3) drives the filter screen (8) on the inner side of the return-shaped frame (6) to move to the outer side of the return air inlet frame (1), rotates the return-shaped frame (6) by 90 degrees, and rotates the filter screen (8) to the side of the return-shaped frame (6) away from the return air inlet frame (1). The second sliding plate (16) drives the fixed rod (17) to be inserted into the return-shaped frame (6) in the fixed groove (23) to be locked, and the telescopic block (22) limits the second sliding plate (16).

2. The return air inlet structure for a central air conditioning system according to claim 1, wherein The inner side of the return air inlet frame (1) is provided with a first sliding groove (2), the first sliding plate (3) is slidably arranged on the inner side of the first sliding groove (2), the inner side of the first sliding groove (2) is provided with a first guide rod (5), the first guide rod (5) is slidably connected with the first sliding plate (3), and the side of the first sliding plate (3) is provided with a first spring (4). The end of the first spring (4) away from the first sliding plate (3) is fixedly connected with the side wall of the first sliding groove (2).

3. The return air opening structure for a central air conditioning system according to claim 1, wherein The inner side of the return-shaped frame (6) is provided with a circular groove (15), the side of the first sliding plate (3) is provided with a circular rod (13), the circular rod (13) is rotatably connected with the return-shaped frame (6), the outer side of the circular rod (13) is provided with a first torsional spring (14), and the first torsional spring (14) is fixedly connected with the inner wall of the circular groove (15).

4. The air return opening structure for a central air conditioning system according to claim 1, wherein The inner side of the return-shaped frame (6) is provided with a first return-shaped plate (10), the inner side of the first return-shaped plate (10) is provided with a second magnet (11), the inner side of the filter screen (8) is provided with a first magnet (9), and the first magnet (9) and the second magnet (11) are adsorbed.

5. The air return opening structure for a central air conditioning system according to claim 4, wherein The inner side of the return air inlet frame (1) is provided with a second return-shaped plate (12), and the second return-shaped plate (12) is in contact with the filter screen (8).

6. The air return opening structure for a central air conditioning system according to claim 5, wherein The inner side of the first sliding plate (3) is respectively provided with a second spring (18) and a second guide rod (19), the second guide rod (19) is slidably connected with the second sliding plate (16), and the end of the second spring (18) away from the return-shaped frame (6) is fixedly connected with the second sliding plate (16).

7. The air return opening structure for a central air conditioning system according to claim 6, wherein The inner side of the first sliding plate (3) is provided with an opening groove (20), the inner side of the opening groove (20) is provided with a third spring (21), the end of the third spring (21) is fixedly connected with an expansion block (22), the expansion block (22) is slidably connected with the opening groove (20), the cross section of the expansion block (22) is trapezoidal, and the inclined surface of the expansion block (22) is above the movement track of the second sliding plate (16).

8. The air return opening structure for a central air conditioning system according to claim 1, wherein The inner side of the air return opening frame (1) is symmetrically rotatably connected with a rotating rod (24), the rotating rod (24) is fixedly connected with a baffle (25), one end of the baffle (25) close to the air return opening frame (1) is provided with a second torsional spring (26), and the end of the second torsional spring (26) away from the baffle (25) is fixedly connected with the inner wall of the air return opening frame (1).

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