Filter screen structure of ventilating duct

Abstract

The filter screen structure comprises a filter screen frame installed on the inner side of the ventilation pipeline, a metal filter screen arranged on the inner side of the filter screen frame and a base block fixed to the surface of the top of the ventilation pipeline, and the top end of the filter screen frame penetrates through the top of the ventilation pipeline and is located on one side of the base block. Two rotating blocks are rotationally mounted at the top of the filter screen frame, two L-shaped movable pressing blocks corresponding to the rotating blocks are movably mounted on the top surface of the base block, and the ends of the rotating blocks are screwed into the inner sides of the L-shaped movable pressing blocks; according to the utility model, the filter screen structure of the ventilating duct in the prior art is improved and optimized, the filter screen is designed to be mounted in a top plug-in manner, and the base block, the L-shaped movable pressing block, the rotating block and other structures are designed in a matched manner, so that the disassembly and assembly convenience of the filter screen can be greatly improved, and the later disassembly, assembly, cleaning and maintenance of the filter screen are facilitated; and the later maintenance convenience of the whole filter screen structure is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ventilation duct filter screens, and in particular relates to a filter screen structure for a ventilation duct. Background Art

[0002] In order to ensure ventilation, many buildings are equipped with ventilation ducts, and filters are also designed in the ventilation ducts to filter impurities in the air. For example, the existing patent with publication number CN104565669A discloses that "the ventilation duct includes: a duct body, at least three layers of filter screens are provided at the air inlet and the air outlet of the duct body, wherein the outermost filter screens at both ends are the first filter screens, and the remaining filter screens are the second filter screens; a groove is provided on the duct body, and the filter screens are smoothly nested into the groove." It can be seen that the ventilation duct in this application is designed with multiple filter screens to achieve air filtering;

[0003] In the prior art, the filter screen in the ventilation duct is generally directly installed inside the ventilation duct, and a convenient disassembly and assembly structure is not designed. When the filter screen is blocked and needs to be removed for replacement and cleaning, it will take a lot of time to disassemble and assemble the filter screen, which reduces the convenience of later maintenance and has disadvantages. For this reason, the utility model proposes a filter screen structure for the ventilation duct. Utility Model Content

[0004] The purpose of the present invention is to provide a filter structure for a ventilation duct to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: a filter structure for a ventilation duct, comprising

[0006] A filter frame installed on the inside of the ventilation duct, a metal filter arranged on the inside of the filter frame, and a base block fixed on the top surface of the ventilation duct. The top of the filter frame passes through the top of the ventilation duct and is located on one side of the base block. Two rotating blocks are rotatably installed on the top of the filter frame, and two L-shaped movable pressing blocks corresponding to the rotating blocks are movably installed on the top surface of the base block. The end of the rotating block is screwed into the inner side of the L-shaped movable pressing block.

[0007] Preferably, an inner slide groove is opened inside the base block, an inner base and a spring are installed in the inner slide groove, the inner base slides inside the inner slide groove, and the bottom end of the L-shaped movable pressure block passes through the inner side of the inner slide groove and is fixed to the inner base.

[0008] Preferably, the top end of the spring abuts against the top inner wall of the inner slide groove, and the bottom end of the spring abuts against the top surface of the inner base.

[0009] Preferably, a through hole communicating with the inner slide groove is provided on the top surface of the base block, and the through hole corresponds to the L-shaped movable pressing block.

[0010] Preferably, a limiting clamping rod is fixed on the inner side of the top end of the L-shaped movable pressing block, and a limiting clamping hole corresponding to the limiting clamping rod is opened on the end surface of the rotating block, and the limiting clamping rod is inserted into the limiting clamping hole.

[0011] Preferably, two shafts are fixed to the top surface of the filter frame, and the two rotating blocks are rotatably sleeved on the shafts respectively.

[0012] Preferably, a rectangular side groove is provided on the left top of the base block, and a rubber side block is embedded in the rectangular side groove. The top surface of the rubber side block is provided with an integrated arc-shaped positioning protrusion, and the arc-shaped positioning protrusion is embedded in the limit card hole.

[0013] Preferably, a strip-shaped through hole corresponding to the filter frame is opened through the top surface of the ventilation duct.

[0014] Compared with the existing technology, the beneficial effects of the present invention are: the present invention improves and optimizes the filter structure of the ventilation duct in the existing technology, designs the filter to be installed in a top plug-in manner, and designs supporting structures such as base blocks, L-shaped movable pressure blocks and rotating blocks, which can greatly improve the convenience of disassembly and assembly of the filter, facilitate the later disassembly, cleaning and maintenance of the filter, and improve the convenience of later maintenance of the entire filter structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 For this utility model Figure 1 A partial enlarged view of area A in the middle;

[0017] Figure 3 This is a cross-sectional view of the connection between the filter frame and the ventilation duct of the utility model;

[0018] Figure 4 For this utility model Figure 3 A partial enlarged view of the middle B area;

[0019] In the figure: 1. Filter frame; 11. Metal filter; 2. Base block; 21. Inner slide groove; 22. Inner base; 23. Spring; 24. Rubber side block; 25. Arc-shaped positioning protrusion; 3. Ventilation duct; 4. L-shaped movable pressure block; 41. Limiting rod; 5. Rotating block; 51. Limiting hole. DETAILED DESCRIPTION

[0020] 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.

[0021] Example

[0022] See also Figures 1 to 4 , is an embodiment of the present utility model, which provides a technical solution: a filter structure for a ventilation duct, comprising

[0023] A filter frame 1 is installed on the inside of the ventilation duct 3, a metal filter 11 is arranged on the inside of the filter frame 1, and a base block 2 is welded and fixed to the top surface of the ventilation duct 3. The metal filter 11 on the inside of the filter frame 1 can filter the air passing through the ventilation duct 3 to a certain extent. The top of the filter frame 1 penetrates to the top of the ventilation duct 3 and is on one side of the base block 2. Two rotating blocks 5 are rotatably installed on the top of the filter frame 1, and two L-shaped movable pressing blocks 4 corresponding to the rotating blocks 5 are movably installed on the top surface of the base block 2. The end of the rotating block 5 is screwed into the inner side of the L-shaped movable pressing block 4, which can block and limit the L-shaped movable pressing block 4 to ensure the installation stability of the filter frame 1.

[0024] Among them, an inner slide groove 21 is opened inside the base block 2, and an inner base 22 and a spring 23 are installed in the inner slide groove 21. The inner base 22 slides inside the inner slide groove 21, and the bottom end of the L-shaped movable pressure block 4 passes through the inner side of the inner slide groove 21 and is fixed to the inner base 22. Under the pushing action of the spring 23, the top end of the L-shaped movable pressure block 4 can be stably pressed on the top of the rotating block 5, ensuring the tightening and limiting of the rotating block 5 and the filter frame 1.

[0025] The top end of the spring 23 abuts against the top inner wall of the inner slide groove 21 , and the bottom end of the spring 23 abuts against the top surface of the inner base 22 .

[0026] The top surface of the base block 2 is provided with a through hole communicating with the inner slide groove 21 , and the through hole corresponds to the L-shaped movable pressing block 4 , so that the bottom end of the L-shaped movable pressing block 4 can pass through smoothly.

[0027] The limit clamping rod 41 is welded to the inner side of the top of the L-shaped movable pressure block 4, and a limit clamping hole 51 is opened on the end surface of the rotating block 5 corresponding to the limit clamping rod 41. The limit clamping rod 41 is inserted into the limit clamping hole 51, which can stably limit the rotating block 5 and ensure the installation stability of the filter frame 1. To remove the filter frame 1 for cleaning and maintenance later, it is only necessary to lift the L-shaped movable pressure block 4 first, so that the inner base 22 moves upward to compress the spring 23, and the limit clamping rod 41 moves out of the limit clamping hole 51 to release the limit of the rotating block 5. At this time, the end of the rotating block 5 is rotated and removed from the bottom of the L-shaped movable pressure block 4, so that it will no longer be blocked and limited by the L-shaped movable pressure block 4. Then the filter frame 1 can be directly moved up and pulled out, and the disassembly of the filter frame 1 can be completed quickly, which is convenient for disassembly, cleaning and maintenance of the filter frame 1, and improves the maintenance convenience of the entire filter structure.

[0028] Among them, two shafts are fixed to the top surface of the filter frame 1 , and two rotating blocks 5 are rotatably sleeved on the shafts respectively, so that the rotating blocks 5 can smoothly rotate on the top of the filter frame 1 .

[0029] Among them, a rectangular side groove is opened on the top left side of the base block 2, and a rubber side block 24 is embedded in the rectangular side groove. The top surface of the rubber side block 24 is provided with an integrated arc-shaped positioning protrusion 25. Both are made of rubber material and will undergo elastic deformation when squeezed, and the arc-shaped positioning protrusion 25 is embedded in the limit card hole 51. During the operator's disassembly and assembly of the filter frame 1, when the end of the rotating block 5 rotates to the top of the base block 2, the arc-shaped positioning protrusion 25 will undergo elastic deformation and be squeezed into the limit card hole 51, thereby realizing auxiliary limitation of the rotating block 5, and at this time the limit card hole 51 will be aligned with the limit card rod 41, which is convenient for the operator to release the L-shaped movable pressure block 4 and the limit card rod 41 to accurately snap into the limit card hole 51, thereby playing an auxiliary positioning effect.

[0030] The top surface of the ventilation duct 3 is penetrated by a strip-shaped through hole corresponding to the filter frame 1 , so that the filter frame 1 can be smoothly inserted.

[0031] Although embodiments of the present invention have been shown and described (see the detailed description above for details), 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 filter structure for a ventilation duct, characterized by: include A filter frame (1) is installed on the inner side of a ventilation duct (3), a metal filter (11) is arranged on the inner side of the filter frame (1), and a base block (2) is fixed on the top surface of the ventilation duct (3). The top end of the filter frame (1) passes through the top of the ventilation duct (3) and is located on one side of the base block (2). Two rotating blocks (5) are rotatably installed on the top of the filter frame (1), and two L-shaped movable pressing blocks (4) corresponding to the rotating blocks (5) are movably installed on the top surface of the base block (2). The ends of the rotating blocks (5) are screwed into the inner side of the L-shaped movable pressing blocks (4).

2. The filter structure for a ventilation duct according to claim 1, characterized in that: An inner slide groove (21) is provided inside the base block (2), an inner base (22) and a spring (23) are installed inside the inner slide groove (21), the inner base (22) is slidably located inside the inner slide groove (21), and the bottom end of the L-shaped movable pressing block (4) passes through the inner side of the inner slide groove (21) and is fixed to the inner base (22).

3. The filter structure for a ventilation duct according to claim 2, characterized in that: The top end of the spring (23) abuts against the top inner wall of the inner slide groove (21), and the bottom end of the spring (23) abuts against the top surface of the inner base (22).

4. The filter structure for a ventilation duct according to claim 2, characterized in that: The top surface of the base block (2) is provided with a through hole communicating with the inner slide groove (21), and the through hole corresponds to the L-shaped movable pressing block (4).

5. The filter structure for a ventilation duct according to claim 1, characterized in that: A limiting clamping rod (41) is fixed on the inner side of the top end of the L-shaped movable pressing block (4), and a limiting clamping hole (51) corresponding to the limiting clamping rod (41) is opened on the end surface of the rotating block (5), and the limiting clamping rod (41) is inserted into the limiting clamping hole (51).

6. The filter structure for a ventilation duct according to claim 1, characterized in that: Two shafts are fixed to the top surface of the filter frame (1), and the two rotating blocks (5) are rotatably sleeved on the shafts respectively.

7. The filter structure for a ventilation duct according to claim 1, characterized in that: A rectangular side groove is provided on the top left side of the base block (2), and a rubber side block (24) is embedded in the rectangular side groove. An integrated arc-shaped positioning protrusion (25) is provided on the top surface of the rubber side block (24), and the arc-shaped positioning protrusion (25) is embedded in the limit card hole (51).

8. The filter structure for a ventilation duct according to claim 1, characterized in that: The top surface of the ventilation duct (3) is penetrated by a strip-shaped through hole corresponding to the filter frame (1).

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