Detachable medium-efficiency air filter

Abstract

The utility model discloses a detachable medium-efficiency air filter, which relates to the technical field of filters and comprises a shell, a filter screen used for air filtering is mounted in the shell, a support part used for supporting the filter screen is mounted in the shell, a detachable protective screen is mounted at an air inlet end of the shell, and a filter screen is mounted at an air outlet end of the shell. A pressure limiting ring used for pressure limiting of the filter screen is mounted on the inner side of the protective screen, a mounting plate is welded to the exhaust end of the shell, and a supporting plate is mounted on the inner side of the mounting plate. Through the supporting piece installed in the shell, the detachable protective net installed at the air inlet end of the shell and the pressure limiting ring installed on the inner side of the protective net and used for limiting pressure of the filter screen, when the filter screen is installed in the shell, one end of the filter screen is supported through the supporting piece, and the pressure of the other end of the filter screen is limited through the pressure limiting ring; the stability of the filter screen installed in the shell is improved, and the problem that the filtering effect is weakened due to the fact that a gap exists between the filter screen and the shell is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a detachable medium-efficiency air filter. Background Art

[0002] An air filter refers to an air filtration device, generally used in clean workshops, clean factories, laboratories and clean rooms, or for dust prevention of electronic machinery communication equipment, etc. There are primary filters, medium-efficiency filters, high-efficiency filters and sub-high-efficiency filters and other models. Each model has different standards and usage efficiencies.

[0003] However, traditional air filters are often fixed by fixing devices. However, this method makes the air filter not easy to disassemble. However, directly using an insertion method to fix the filter net makes the stability of the filter net insufficient after insertion, resulting in a gap between the filter net and the housing, causing the problem of poor filtering effect. Summary of the Utility Model

[0004] The utility model aims at the deficiencies of the prior art and provides the following technical solutions: a detachable medium-efficiency air filter, including a housing, a filter net for air filtration is installed in the housing, a support member for supporting the filter net is installed in the housing, a detachable protective net is installed at the air inlet end of the housing, a pressure-limiting ring for limiting the pressure of the filter net is installed inside the protective net, a mounting plate is welded at the air outlet end of the housing, a support plate is installed inside the mounting plate, and a fan for exhausting air to the air outlet end of the housing is installed in the middle of the support plate.

[0005] As an improvement of the above technical solution, a hinge for rotation is installed between one end of the protective net and the housing, an ear plate is fixed at the other end of the protective net, and a positioning screw is installed in a hole on the surface of the ear plate, and the end of the positioning screw is screwed into a screw hole opened on the outer surface of the housing.

[0006] As an improvement of the above technical solution, the support member includes a support frame installed in the housing, a spring is installed in a cavity arranged inside the support frame, a support ring is installed in the cavity of the support frame through the spring, and the support ring contacts the filter net.

[0007] As an improvement of the above technical solution, the support frame, the support ring and the pressure-limiting ring are all square ring structures.

[0008] As an improvement of the above technical solution, a convex platform for preventing falling off is arranged at one end of the support ring located inside the support frame.

[0009] Advantages of the Utility Model

[0010] 1. By means of the support member installed inside the housing and the detachable protective net installed at the air inlet end of the housing, and a pressure-limiting ring for filtering net pressure-limiting is installed inside the protective net. When the filtering net is installed inside the housing, one end is supported by the support member, and the other end of the filtering net is pressure-limited by the pressure-limiting ring, which increases the stability of the filtering net installed inside the housing, prevents the problem of weakened filtering effect caused by the gap between the filtering net and the housing. At the same time, after the protective net is opened, it is convenient to disassemble and replace the filtering net, which achieves the purpose of disassembling and replacing the filtering net of the air filter, and avoids the problem of blockage caused by long-term use of the filtering net. The mounting plate welded at the exhaust end of the housing facilitates the mounting plate to be fixed on the wall through the bolts installed in the holes opened on the surface. At the same time, the mounting plate is provided with a fan through the support plate, which facilitates the air inside the housing to be discharged outwards through the fan, and facilitates the air outside the housing to enter through the filtering net for filtration.

[0011] 2. By means of the hinge installed between the housing and the protective net, it is convenient for the protective net to rotate around the hinge at the air inlet end of the housing. The surface of the ear plate fixed at the other end of the protective net is provided with a positioning screw installed in the hole, and the end of the positioning screw is screwed into the screw hole opened on the surface of the housing, so that the protective net is fixed to the housing through the positioning screw. When the protective net is fixed to the housing, the pressure-limiting ring installed inside the protective net can pressure-limit the filtering net.

[0012] 3. By means of the support member composed of a support frame, a spring and a support ring, and the support ring is movably installed in the cavity opened in the support frame through the spring, which facilitates the support ring to support the filtering net. The anti-detachment boss provided at one end of the support ring facilitates the movable installation of one end of the support ring in the cavity of the support frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the first three-dimensional structure diagram of the present utility model;

[0014] Figure 2 is the second three-dimensional structure diagram of the present utility model;

[0015] Figure 3 is the first sectional structure diagram of the present utility model;

[0016] Figure 4 is the second sectional structure diagram of the present utility model;

[0017] Figure 5 is Figure 3 the enlarged structure diagram at A in

[0018] Reference numerals: 1, housing; 2, support member; 21, support frame; 22, spring; 23, support ring; 3, protective net; 4, pressure-limiting ring; 5, filtering net; 6, ear plate; 7, positioning screw; 8, mounting plate; 9, support plate; 10, fan; 11, hinge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the purpose, technical solution and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0020] Please refer to Figures 1 - 5 , the present utility model provides a technical solution: a detachable medium-efficiency air filter, including a housing 1, a filter net 5 for air filtration is installed in the housing 1, a support member 2 for supporting the filter net 5 is installed in the housing 1, a detachable protection net 3 is installed at the air inlet end of the housing 1, a pressure-limiting ring 4 for limiting the pressure of the filter net 5 is installed inside the protection net 3, a mounting plate 8 is welded at the air outlet end of the housing 1, a support plate 9 is installed inside the mounting plate 8, and a fan 10 for exhausting air to the air outlet end of the housing 1 is installed in the middle of the support plate 9.

[0021] In this implementation scheme, through the support member 2 installed in the housing 1, and the detachable protection net 3 installed at the air inlet end of the housing 1, and at the same time, a pressure-limiting ring 4 for limiting the pressure of the filter net 5 is installed inside the protection net 3, when the filter net 5 is installed inside the housing 1, one end is supported by the support member 2, and the other end of the filter net 5 is pressure-limited by the pressure-limiting ring 4, which increases the stability of the filter net 5 installed in the housing 1 and prevents the problem of weakened filtration effect caused by the gap between the filter net 5 and the housing 1. At the same time, after the protection net 3 is opened, it is also convenient to disassemble the filter net 5 for replacement, which increases the purpose of disassembling and replacing the filter net 5 of the air filter and avoids the problem of blockage caused by long-term use of the filter net 5. The mounting plate 8 welded at the air outlet end of the housing 1 is convenient for the mounting plate 8 to be fixed on the wall through the bolts installed in the holes on the surface, and at the same time, the mounting plate 8 is provided with a fan 10 through the support plate 9, which is convenient for the air inside the housing 1 to be discharged outwards through the fan 10 and for the air outside the housing 1 to enter through the filter net 5 for filtration.

[0022] Specifically, a hinge 11 for rotation is installed between one end of the protection net 3 and the housing 1, an ear plate 6 is fixed at the other end of the protection net 3, and a positioning screw 7 is installed in the hole on the surface of the ear plate 6, and the end of the positioning screw 7 is screwed into the screw hole opened on the outer surface of the housing 1.

[0023] In this embodiment, through the hinge 11 installed between the housing 1 and the protection net 3, it is convenient for the protection net 3 to rotate around the hinge 11 at the air inlet end of the housing 1. And a positioning screw 7 is installed in the hole on the surface of the ear plate 6 fixed at the other end of the protection net 3, and the end of the positioning screw 7 is screwed into the screw hole opened on the surface of the housing 1, so that the protection net 3 is fixed to the housing 1 through the positioning screw 7. When the protection net 3 is fixed to the housing 1, the protection net 3 limits the pressure of the filter net 5 through the pressure-limiting ring 4 installed inside.

[0024] Specifically, the support member 2 includes a support frame 21 installed inside the housing 1. A spring 22 is installed in a cavity provided inside the support frame 21. A support ring 23 is installed in the cavity of the support frame 21 through the spring 22, and the support ring 23 is in contact with the filter net 5. The support frame 21, the support ring 23, and the pressure limiting ring 4 are all square ring-shaped structures. A convex platform for preventing detachment is provided at one end of the support ring 23 located inside the support frame 21.

[0025] In this embodiment, the support member 2 composed of the support frame 21, the spring 22, and the support ring 23 is adopted. The support ring 23 is movably installed in the cavity opened in the support frame 21 through the spring 22, so as to facilitate the support ring 23 to support the filter net 5. A convex platform for preventing detachment is provided at one end of the support ring 23, so as to facilitate the movable installation of one end of the support ring 23 in the cavity of the support frame 21.

[0026] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it.

Claims

1. A detachable medium-efficiency air filter, comprising a housing (1), characterized in that: A filter screen (5) for air filtering is installed in the shell (1), a support member (2) for supporting the filter screen (5) is installed in the shell (1), a detachable protective screen (3) is installed at the air inlet end of the shell (1), a pressure limiting ring (4) for limiting the pressure of the filter screen (5) is installed on the inner side of the protective screen (3), a mounting plate (8) is welded to the exhaust end of the shell (1), a support plate (9) is installed on the inner side of the mounting plate (8), and a fan (10) for exhausting air to the exhaust end of the shell (1) is installed in the middle of the support plate (9).

2. A detachable medium efficiency air filter according to claim 1, characterized in that: A hinge (11) for rotation is installed between one end of the protective net (3) and the shell (1), and an ear plate (6) is fixed to the other end of the protective net (3). A positioning screw (7) is installed in a hole provided on the surface of the ear plate (6), and the end of the positioning screw (7) is screwed into a screw hole provided on the outer surface of the shell (1).

3. A detachable medium efficiency air filter according to claim 1, characterized in that: The support member (2) comprises a support frame (21) installed in the housing (1), a spring (22) being installed in a cavity provided in the support frame (21), a support ring (23) being installed in the cavity of the support frame (21) via the spring (22), and the support ring (23) being in contact with the filter screen (5).

4. A detachable medium efficiency air filter according to claim 3, characterized in that: The support frame (21), the support ring (23) and the pressure limiting ring (4) are all square ring structures.

5. The detachable medium efficiency air filter according to claim 3, characterized in that: One end of the support ring (23) located inside the support frame (21) is provided with an anti-falling boss.

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