Return air filter of central air conditioner

Abstract

The utility model relates to the technical field of air conditioner return air filters, and discloses a return air filter of a central air conditioner. The return air filter of the central air conditioner comprises a fixing frame, a sliding plate, filter cotton and limiting frames, the sliding plate is arranged on the front side of the fixing frame in a sliding mode, the filter cotton is placed between the fixing frame and the sliding plate, the fixing frame and the sliding plate are both provided with the limiting frames, and the filter cotton is located between the two limiting frames. Limiting rods and connecting plates are further included, the multiple limiting rods are fixedly connected to the rear side of the sliding plate, the limiting rods are clamped into the fixing frame, and the connecting plates are fixedly connected to the left side and the right side of the sliding plate. By pulling the connecting plate outwards, the clamping plate is separated from the fixing frame, then the sliding plate is pulled forwards, the limiting rod is separated from the fixing frame, then the sliding plate is detached, old filter cotton is taken out, and new filter cotton is replaced, so that the whole filter does not need to be replaced, the purpose of reducing the cost is achieved, and the use efficiency of the filter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning return air filters and discloses a central air-conditioning return air filter. Background Art

[0002] The return air filter of the central air-conditioning system is an important component of the entire air-conditioning system. It is mainly used to filter dust, particulate matter and other impurities in the return air to maintain indoor air quality and extend the service life of the air-conditioning equipment.

[0003] Return air filters primarily purify the air by filtering out pollutants such as dust, pollen, and bacteria from the return air, improving indoor air quality. They also protect the equipment by reducing the wear and tear of dust and other impurities on internal components of the air conditioning system, thereby extending the life of the equipment. After prolonged use, dust accumulates on the return air filter, necessitating replacement. However, this process typically requires disassembly of the entire filter, increasing costs and reducing filter efficiency.

[0004] Therefore, a central air-conditioning return air filter that is easy to replace is needed. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art that the entire filter usually needs to be disassembled for replacement during the replacement process, which will increase costs and reduce the efficiency of the filter, the utility model provides a central air conditioning return air filter that is easy to replace.

[0006] The utility model provides the following technical solutions: a central air-conditioning return air filter, comprising a fixed frame, a sliding plate, filter cotton and a limit frame, wherein a sliding plate is slidingly arranged on the front side of the fixed frame, filter cotton is placed between the fixed frame and the sliding plate, the fixed frame and the sliding plate are both provided with limit frames, the filter cotton is located between the two limit frames, and further comprises a limit rod, a connecting plate and a card plate, a plurality of limit rods are fixedly connected to the rear side of the sliding plate, the limit rods are clamped into the fixed frame, the left and right sides of the sliding plate are fixedly connected with connecting plates, the connecting plate is fixedly connected with a card plate, and the card plate is clamped with the fixed frame.

[0007] Further explanation, it also includes a fixing plate, an iron-absorbing plate and screws. Multiple fixing plates are detachably provided on the rear side of the fixing frame. Two vertically aligned fixing plates are fixedly connected to the iron-absorbing plate, and screws are threadedly provided on the fixing plates.

[0008] Further explanation, it also includes a support plate, a sliding block, a spring and a clamping block. The support plates are installed on the left and right sides of the fixed frame. The sliding blocks are slidably arranged on the support plates. A spring is connected between the support plate and the sliding block, and the clamping block is fixedly connected to the sliding block.

[0009] Further description, it also includes a gusset plate, which is fixedly connected to the card plate.

[0010] Further description, a rubber pad is also included, and the clamping block is provided with a rubber pad.

[0011] To further illustrate, there are card slots on the left and right sides of the fixing frame, and the card plates can be inserted into the card slots.

[0012] Compared with the prior art, the utility model provides a central air-conditioning return air filter with the following beneficial effects: 1. By pulling the card plate outward to disengage it from the fixed frame, and then pulling the sliding plate forward to disengage the limit rod from the fixed frame, the sliding plate can be removed and the old filter cotton can be taken out and replaced with a new filter cotton, thereby eliminating the need to replace the entire filter, thereby achieving the purpose of reducing costs and improving the efficiency of filter use.

[0013] 2. The magnetic plate contacts the central air conditioner and then adsorbs on the central air conditioner, thereby fixing the fixing bracket and facilitating installation.

[0014] 3. The sliding block is driven to move inward by the spring rebound, and the inward movement of the sliding block causes the clamping block to move inward and clamp the central air-conditioning shell, so that the device is suitable for different types of central air-conditioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the fixing frame, sliding plate and connecting plate of the utility model.

[0017] Figure 3 It is a partial cross-sectional view of the limiting rod, limiting frame and gusset plate of the utility model.

[0018] Figure 4 This is an exploded view of the filter cotton, limit frame and connecting plate of the utility model.

[0019] Figure 5 It is a three-dimensional structural diagram of the fixing frame and the iron-absorbing plate of the utility model.

[0020] Figure 6 It is a partial cross-sectional view of the fixing plate, the iron-absorbing plate and the screws of the utility model.

[0021] Figure 7 This is a partial cross-sectional view of the support plate, sliding block and spring of the utility model.

[0022] In the above figures: 1-fixed frame, 2-sliding plate, 3-limiting rod, 4-filter cotton, 5-limiting frame, 6-connecting plate, 7-card plate, 8-buckle plate, 9-fixed plate, 10-magnetic plate, 11-screw, 12-support plate, 13-sliding block, 14-spring, 15-clamping block, 16-rubber pad. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1: A central air conditioning return air filter, see Figure 1-Figure 7 , including a fixed frame 1, a sliding plate 2, filter cotton 4 and a limit frame 5. The front side of the fixed frame 1 is slidably provided with a sliding plate 2. Filter cotton 4 is placed between the fixed frame 1 and the sliding plate 2. Both the fixed frame 1 and the sliding plate 2 are provided with a limit frame 5. The filter cotton 4 is located between the two limit frames 5. Four limit rods 3 are fixedly connected to the rear side of the sliding plate 2. The limit rods 3 are snapped into the fixed frame 1. The left and right sides of the sliding plate 2 are fixedly connected to connecting plates 6. A card plate 7 is fixedly connected to the connecting plate 6. A card slot is opened on the left and right sides of the fixed frame 1. The card plate 7 can be snapped into the card slot and snapped with the fixed frame 1. The contact surface between the fixed frame 1 and the card plate 7 is a curved surface. A buckle plate 8 is fixedly connected to the card plate 7. The buckle plate 8 increases the fulcrum of the hand and the card plate 7, which is convenient for pulling the card plate 7 outward.

[0025] When the central air conditioner return air filter needs to be used, the fixing bracket 1 is moved to the vicinity of the return air outlet of the central air conditioner, and then the fixing bracket 1 is fixed on the return air outlet with a tool. The filter cotton 4 filters out pollutants such as dust, pollen, and bacteria in the return air, thereby improving the indoor air quality and reducing the wear of dust and other impurities on the internal components of the air conditioning system, thereby extending the life of the equipment. After using the filter for a long time, the filter cotton 4 will absorb a large amount of dust and other impurities. At this time, the card plate 7 can be pulled outward to disengage it from the fixing bracket 1, and then the sliding plate 2 can be pulled forward to disengage the limit rod 3 from the fixing bracket 1, and then the sliding plate 2 can be removed, and then the old filter cotton 4 can be taken out and replaced with a new filter cotton 4, so that there is no need to replace the entire filter, thereby reducing costs and improving the efficiency of the filter. After the replacement is completed, the sliding plate 2 is moved to the front side of the fixing bracket 1 and pushed backward to re-contact the limit rod 3 with the fixing bracket 1, and then the card plate 7 is re-engaged with the fixing bracket 1, and then the sliding plate 2 is fixed to the fixing bracket 1.

[0026] Example 2: Based on Example 1, please refer to Figure 5 and Figure 6 The rear side of the fixing frame 1 is detachably provided with four fixing plates 9, two fixing plates 9 aligned vertically are fixedly connected to an iron-absorbing plate 10, and screws 11 are threadedly provided on the fixing plates 9.

[0027] After the fixing bracket 1 is moved to the vicinity of the return air outlet of the central air conditioner, the magnetic plate 10 is brought into contact with the central air conditioner and then adsorbed on the central air conditioner, thereby fixing the fixing bracket 1 and facilitating installation.

[0028] See also Figure 1 and Figure 7 , support plates 12 are provided on the left and right sides of the fixing frame 1 by bolt connection, a sliding block 13 is slidably provided on the support plate 12, a spring 14 is connected between the support plate 12 and the sliding block 13, a clamping block 15 is fixedly connected to the sliding block 13, a rubber pad 16 is provided on the clamping block 15, the rubber pad 16 reduces the pressure between the clamping block 15 and the central air-conditioning casing to avoid damage to the central air-conditioning casing due to excessive pressure.

[0029] When installing the filter, the fixing bracket 1 is moved to the return air outlet of the central air conditioner. At this time, the central air conditioner shell will squeeze the sliding block 13 to move outward, and the spring 14 will be compressed accordingly. The sliding block 13 moves outward and drives the clamping block 15 to move outward. After the movement is completed, the spring 14 rebounds and drives the sliding block 13 to move inward. The inward movement of the sliding block 13 causes the clamping block 15 to move inward and clamp the central air conditioner shell, so that the device is suitable for different types of central air conditioners.

[0030] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A central air conditioning return air filter, comprising a fixed frame (1), a sliding plate (2), filter cotton (4) and a limiting frame (5), wherein the sliding plate (2) is slidingly provided on the front side of the fixed frame (1), the filter cotton (4) is placed between the fixed frame (1) and the sliding plate (2), the fixed frame (1) and the sliding plate (2) are both provided with limiting frames (5), and the filter cotton (4) is located between the two limiting frames (5), characterized in that: The sliding plate (2) further comprises a limit rod (3), a connecting plate (6) and a clamping plate (7); a plurality of limit rods (3) are fixedly connected to the rear side of the sliding plate (2); the limit rods (3) are clamped into the fixing frame (1); the left and right sides of the sliding plate (2) are fixedly connected to the connecting plates (6); the clamping plate (7) is fixedly connected to the connecting plates (6); and the clamping plate (7) is clamped to the fixing frame (1).

2. A central air conditioning return air filter according to claim 1, characterized in that: The invention also comprises a fixing plate (9), an iron-absorbing plate (10) and a screw (11); a plurality of fixing plates (9) are detachably provided on the rear side of the fixing frame (1); two fixing plates (9) aligned vertically are fixedly connected to the iron-absorbing plate (10); and the fixing plates (9) are provided with screws (11) in a threaded manner.

3. A central air conditioning return air filter according to claim 2, characterized in that: The invention also comprises a support plate (12), a sliding block (13), a spring (14) and a clamping block (15). The support plate (12) is installed on the left and right sides of the fixed frame (1). The sliding block (13) is slidably arranged on the support plate (12). The spring (14) is connected between the support plate (12) and the sliding block (13). The clamping block (15) is fixedly connected to the sliding block (13).

4. A central air conditioning return air filter according to claim 3, characterized in that: It also includes a gusset plate (8), which is fixedly connected to the card plate (7).

5. A central air-conditioning return air filter as claimed in claim 4, characterized in that: It also includes a rubber pad (16), and the clamping block (15) is provided with the rubber pad (16).

6. A central air-conditioning return air filter as claimed in claim 5, characterized in that: The fixing frame (1) is provided with card slots on both sides thereof, and the card plate (7) can be inserted into the card slots.

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