Air filter

Abstract

The utility model discloses an air filter which comprises an upper cover, a lower cover, a filter material and an outer net cylinder, the filter material is located in the outer net cylinder, an air inlet channel is formed between the filter material and the outer net cylinder, an annular air inlet hole is formed in the upper cover, and the annular air inlet hole is communicated with the air inlet channel; a filter screen is arranged in the annular air inlet hole, a limiting step is arranged on the side wall of the annular air inlet hole, and the filter screen abuts against the limiting step. The annular air inlet hole is formed in the upper cover, the filter screen is arranged in the annular air inlet hole, and the filter screen can roughly filter air, filter large-particle dust and prevent the large-particle dust from blocking the filter holes of the filter material. The air subjected to coarse filtration enters the air inlet channel, the air is discharged from the air outlet of the upper cover after being filtered by the filter material, dust particles filtered by the filter material can be concentrated at the bottom of the air inlet channel, when dust is cleaned, the filter material, the upper cover and the lower cover can be separated, and the separated filter material can be cleaned or replaced.

Description

Technical Field

[0001] The utility model relates to air filtering equipment, in particular to an air filter. Background Art

[0002] At present, common air filtration equipment on the market is generally a structure integrated with a filter element. After filtering the air for a long time, the filter element is prone to accumulate dust, causing the filter holes to be blocked. The existing filter element can only be cleaned on the equipment, which makes cleaning difficult and has low cleaning efficiency. Summary of the invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the utility model aims to provide an air filter.

[0004] The purpose of the utility model is achieved through the following technical solution: an air filter, comprising an upper cover, a lower cover, a filter material and an outer net tube, wherein the filter material is located inside the outer net tube, an air intake channel is formed between the filter material and the outer net tube, and an annular air intake hole is provided on the upper cover, and the annular air intake hole is connected to the air intake channel. Coarsely filtered air enters the air intake channel, and the air is discharged from the air outlet of the upper cover after being filtered by the filter material. The dust particles filtered by the filter material will be concentrated at the bottom of the air intake channel. When cleaning the dust, the filter material, the upper cover and the lower cover can be separated, and the separated filter material can be cleaned or replaced.

[0005] As an improvement of the air filter of the utility model, a filter screen is provided in the annular air inlet, and a limiting step is provided on the side wall of the annular air inlet, and the filter screen abuts against the limiting step. The filter screen is arranged in the annular air inlet, and can filter out some large particles of impurities to prevent the large particles of impurities from clogging the filter holes in the filter material. The filter screen can be taken out from the annular air inlet for cleaning or replacement.

[0006] As an improvement of the air filter of the utility model, the filter material is covered with inner filter holes and outer filter holes, the inner filter holes and outer filter holes are staggered, and both the inner filter holes and outer filter holes are small in the middle and large at both ends. The pore size of the filter material is small in the middle and large at both ends. When the air pressure changes from the air inlet end to the air outlet end, the small end in the middle can compress the air and reduce the pressure difference with the air inlet end, and the large end can increase the dust holding capacity, dust filtration efficiency and noise reduction effect.

[0007] As an improvement of the air filter of the utility model, the corresponding surfaces of the upper cover and the lower cover are provided with filter material installation grooves, and the two ends of the filter material are respectively embedded in the filter material installation grooves and fixed. When the filter element is taken out of the device, it can be separated from the upper cover and the lower cover, and the separated filter material can be cleaned or replaced.

[0008] As an improvement of the air filter of the utility model, the corresponding surfaces of the upper cover and the lower cover are provided with outer net tube installation grooves, and the two ends of the outer net tube are respectively embedded in the outer net tube installation grooves and fixed. The outer net tube mainly supports the upper cover and the lower cover.

[0009] As an improvement of the air filter of the utility model, the two ends of the filter material are respectively provided with end caps and bonded to the end caps, and the end caps are provided with screw holes. The end caps are used to fix the filter material.

[0010] As an improvement of the air filter of the utility model, the upper cover and the lower cover are both provided with screw countersunk holes at positions corresponding to the filter material installation slot, and when the end cover is embedded in the filter material installation slot, the end cover is fixed by screws.

[0011] As an improvement of the air filter of the utility model, an air outlet is provided in the middle of the upper cover. The air outlet is connected to the cavity of the filter material, and the air filtered by the filter material is discharged from the air outlet. A threaded interface is provided on the outer side of the upper cover at the position of the air outlet, and the threaded interface is connected to the device.

[0012] The utility model has the beneficial effect that: the utility model is provided with an annular air inlet hole on the upper cover, and a filter screen is provided in the annular air inlet hole, and the filter screen can roughly filter the air, filter large dust particles, and prevent large dust particles from blocking the filter holes of the filter material. The roughly filtered air enters the air inlet channel, and the air is discharged from the air outlet of the upper cover after being filtered by the filter material. The dust particles filtered by the filter material will be concentrated at the bottom of the air inlet channel. When cleaning the dust, the filter material, the upper cover and the lower cover can be separated, and the separated filter material can be cleaned or replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of the utility model;

[0014] The accompanying drawings are marked as: 1. upper cover, 2. lower cover, 3. filter material, 4. outer mesh tube, 5. air inlet channel, 6. annular air inlet hole, 7. filter screen, 8. limiting step, 9. filter material mounting groove, 10. outer mesh tube mounting groove, 11. screw countersunk hole, 12. air outlet hole, 31. inner filter hole, 32. outer filter hole, 33. end cover. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0017] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0018] like Figure 1 As shown, an air filter comprises an upper cover 1, a lower cover 2, a filter material 3 and an outer net tube 4. The filter material 3 is located inside the outer net tube 4. An air inlet channel 5 is formed between the filter material 3 and the outer net tube 4. An annular air inlet hole 6 is provided on the upper cover 1, and the annular air inlet hole 6 is connected to the air inlet channel 5. Roughly filtered air enters the air inlet channel 5, and the air is discharged from the air outlet of the upper cover 1 after being filtered by the filter material 3. The dust particles filtered by the filter material 3 will be concentrated at the bottom of the air inlet channel 5. When cleaning the dust, the filter material, the upper cover and the lower cover can be separated, and the separated filter material can be cleaned or replaced.

[0019] Preferably, a filter screen 7 is provided in the annular air inlet hole 6, and a limiting step 8 is provided on the side wall of the annular air inlet hole 6, and the filter screen 7 abuts against the limiting step 8. The filter screen is arranged in the annular air inlet hole 6, and can filter out some large particles of impurities to prevent the large particles of impurities from clogging the filter holes in the filter material. The filter screen can be taken out from the annular air inlet hole for cleaning or replacement.

[0020] Preferably, the filter material 3 is covered with inner filter holes 31 and outer filter holes 32, which are staggered and both have a structure of small in the middle and large at both ends. The pore size of the filter material 3 is small in the middle and large at both ends. When the air pressure changes from the air inlet end to the air outlet end, the small end in the middle can compress the air and reduce the pressure difference with the air inlet end, and the large end can increase the dust holding capacity, dust filtration efficiency and noise reduction effect.

[0021] Preferably, the corresponding surfaces of the upper cover 1 and the lower cover 2 are provided with filter material installation grooves 9, and the two ends of the filter material 3 are respectively embedded and fixed in the filter material installation grooves 9. When the filter element is taken out of the device, it can be separated from the upper cover and the lower cover, and the separated filter material can be cleaned or replaced.

[0022] Preferably, the corresponding surfaces of the upper cover 1 and the lower cover 2 are both provided with outer net tube installation grooves 10, and the two ends of the outer net tube 4 are respectively embedded and fixed in the outer net tube installation grooves 10. The outer net tube 4 mainly supports the upper cover 1 and the lower cover 2.

[0023] Preferably, both ends of the filter material 3 are respectively provided with end caps 33 and bonded to the end caps 33 , and screw holes are provided on the end caps 33 . The end caps 33 are used to fix the filter material 3 .

[0024] Preferably, screw countersunk holes 11 are provided at positions of the upper cover 1 and the lower cover 2 corresponding to the filter material installation slot 9, and when the end cover 33 is embedded in the filter material installation slot 9, the end cover is fixed by screws.

[0025] Preferably, an air outlet 12 is provided in the middle of the upper cover 1. The air outlet 12 is connected to the cavity of the filter material 3, and the air filtered by the filter material 3 is discharged from the air outlet. A threaded interface is provided on the outer side of the upper cover at the position of the air outlet, and the threaded interface is connected to the device.

[0026] 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 the embodiments without departing from the principles and structures of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air filter, characterized in that: It includes an upper cover, a lower cover, a filter material and an outer net cylinder, wherein the filter material is located in the outer net cylinder, an air inlet channel is formed between the filter material and the outer net cylinder, and an annular air inlet hole is provided on the upper cover, and the annular air inlet hole is connected with the air inlet channel; A filter screen is arranged in the annular air inlet hole, and a limiting step is arranged on the side wall of the annular air inlet hole, and the filter screen abuts against the limiting step.

2. The air filter according to claim 1, characterized in that: The filter material is covered with inner filter holes and outer filter holes, the inner filter holes and the outer filter holes are staggered, and both the inner filter holes and the outer filter holes are small in the middle and large at both ends.

3. The air filter according to claim 1, characterized in that: The corresponding surfaces of the upper cover and the lower cover are both provided with filter material installation grooves, and the two ends of the filter material are respectively embedded in the filter material installation grooves and fixed.

4. The air filter according to claim 3, characterized in that: The corresponding surfaces of the upper cover and the lower cover are both provided with outer net tube installation grooves, and the two ends of the outer net tube are respectively embedded in the outer net tube installation grooves and fixed.

5. The air filter according to claim 4, characterized in that: The two ends of the filter material are respectively provided with end caps and bonded to the end caps, and the end caps are provided with screw holes.

6. The air filter according to claim 5, characterized in that: The upper cover and the lower cover are both provided with screw countersunk holes at positions corresponding to the filter material installation slot, and when the end cover is embedded in the filter material installation slot, the end cover is fixed by screws.

7. The air filter according to claim 1, characterized in that: An air outlet is arranged in the middle of the upper cover.

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