Air filter for noise reduction type air compressor

Abstract

The utility model belongs to air compressor field discloses a kind of air filters for noise reduction type air compressor, including shell assembly, be arranged in the noise reduction filter element of shell assembly and the connecting pipe connected with shell assembly, the cavity of shell assembly is divided into inner chamber, middle cavity and outer chamber by noise reduction filter element, the middle cavity is surrounded in outer chamber, the outer chamber is surrounded in outer chamber, the outer chamber is respectively communicated with the lumen of inner chamber and connecting pipe, the inner chamber is communicated with middle cavity, air compressor air inlet is also arranged on the shell assembly and communicated with middle cavity.The utility model can avoid the risk of falling during the use of air filter, air filter is composed of air filter base, noise reduction filter element, air filter cover and connecting pipe, air filter is isolated into 3 noise reduction chambers, significantly reduce the noise of air compressor.

Description

Technical Field

[0001] This utility model relates to the field of air compressors, specifically to a noise-reducing air filter for air compressors. Background Technology

[0002] As a well-known technology, conventional piston air compressor air filters generally adopt a circular structure with built-in threads, directly screwed onto the air compressor inlet. Existing air filters have the following drawbacks: they do not offer significant noise reduction, and customer feedback indicates a poor user experience. Utility Model Content

[0003] The purpose of this invention is to provide a noise-reducing air filter for air compressors to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A noise-reducing air filter for an air compressor includes a housing assembly, a noise-reducing filter element disposed in the housing assembly, and a connecting pipe connected to the housing assembly. The cavity of the housing assembly is divided into an inner cavity, a middle cavity, and an outer cavity by the noise-reducing filter element. The middle cavity surrounds the inner cavity, and the outer cavity surrounds the middle cavity. The outer cavity communicates with the inner cavity and the lumen of the connecting pipe, respectively. The inner cavity communicates with the middle cavity. The housing assembly is also provided with an air compressor inlet communicating with the middle cavity.

[0005] Furthermore, the housing assembly includes a mating air filter base and an air filter cover. A high outer ring and a low inner ring are provided on the front inner wall of the air filter base opposite to the air filter cover. The high outer ring surrounds the low inner ring, and the rear end of the high outer ring extends beyond the rear end of the low inner ring. The noise reduction filter element is simultaneously in contact with the high outer ring and the low inner ring. The inner wall of the low inner ring forms an inner cavity, and a middle cavity is formed between the outer wall of the low inner ring and the inner wall of the high outer ring. The outer wall of the high outer ring forms an outer cavity.

[0006] Furthermore, a first notch is provided on the short inner ring to connect the inner cavity with the middle cavity, and the first notch and the air compressor inlet are located at opposite ends of the middle cavity.

[0007] Furthermore, the noise reduction filter element includes a spacer ring, an outer flange disposed on the outer edge of the rear end of the spacer ring, and a filter element body disposed in the spacer ring. The shape and size of the spacer ring are matched with the short inner ring, and the front end face of the spacer ring is attached to the rear end face of the short inner ring. The shape and size of the outer flange are matched with the tall outer ring, and the front end face of the outer flange is attached to the rear end face of the tall outer ring.

[0008] Furthermore, a pressure ring is provided on the front side of the air filter cover. The shape and size of the pressure ring match the rear end face of the spacer and / or the rear end face of the outward flange. The pressure ring presses against the rear end face of the spacer and / or the rear end face of the outward flange.

[0009] Furthermore, the pressure ring is provided with a second notch that connects the outer cavity and the inner cavity.

[0010] Furthermore, the high outer ring is a circular ring structure, and / or the low inner ring is an arc structure.

[0011] Furthermore, the noise-reducing filter element has a cylindrical structure.

[0012] Furthermore, the housing assembly is provided with an interface for connecting to the connecting pipe, and a flow guide is provided in the outer cavity of the housing assembly. The position of the flow guide corresponds to the interface, and the flow guide is used to guide the airflow entering the outer cavity through the interface to the left and right sides of the outer ring.

[0013] Furthermore, the air filter is a square air filter.

[0014] Compared with the prior art, the beneficial effects of this utility model are: this utility model can avoid the risk of air filter falling off during use. The air filter consists of an air filter base, a noise reduction filter element, an air filter cover and a connecting pipe, which isolates the air filter into 3 noise reduction chambers, significantly reducing the noise of the air compressor. Attached Figure Description

[0015] Figure 1 This is one of the structural schematic diagrams of this utility model.

[0016] Figure 2 This is the second schematic diagram of the structure of this utility model.

[0017] Figure 3 This is an exploded structural diagram of the present invention.

[0018] Figure 4 This is the third schematic diagram of the structure of this utility model.

[0019] Figure 5 for Figure 4 Sectional view of AA.

[0020] Figure 6 for Figure 4 BB cross-sectional view.

[0021] Figure 7 for Figure 4 CC section view.

[0022] Figure 8 This is a schematic diagram of the cross-sectional structure of the noise reduction filter element in this utility model.

[0023] In the diagram: air filter base 1, low inner ring 100, first notch 1000, high outer ring 101, interface 102, air compressor inlet 103, flow guide 104, noise reduction filter element 2, spacer ring 200, outward flange 201, filter element body 202, air filter cover 3, pressure ring 300, second notch 3000, connecting pipe 4, inner cavity 5, middle cavity 6, outer cavity 7. Detailed Implementation

[0024] 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.

[0025] Please see Figures 1-6 A noise-reducing air filter for an air compressor is disclosed. The air filter is a square air filter, comprising a housing assembly, a noise-reducing filter element 2 disposed in the housing assembly, and a connecting pipe 4 connected to the housing assembly. The connecting pipe 4 is preferably a flexible hose. The cavity of the housing assembly is divided into an inner cavity 5, a middle cavity 6, and an outer cavity 7 by the noise-reducing filter element 2. The middle cavity 6 surrounds the inner cavity 5, and the outer cavity 7 surrounds the middle cavity 6. The outer cavity 7 is connected to the inner cavity 5 and the cavity of the connecting pipe 4, respectively. The inner cavity 5 is connected to the middle cavity 6. An air compressor inlet 103 is also provided on the housing assembly and is connected to the middle cavity 6. The air compressor inlet 103 is not directly connected to the inner cavity 5 and the outer cavity 7.

[0026] Continue reading Figures 3-7 In one embodiment of this utility model, the housing assembly includes an air filter base 1 and an air filter cover 3 that are snapped together by a conventional snap-fit ​​and slot structure. The air filter base 1 and the air filter cover 3 can also be connected by bolts. A high outer ring 101 and a low inner ring 100 are provided on the front inner wall of the air filter base 1 opposite to the air filter cover 3. The front ends of the high outer ring 101 and the low inner ring 100 are connected to the front inner wall of the air filter base 1. The high outer ring 101 surrounds the low inner ring 100, and the rear end of the high outer ring 101 extends beyond the rear end of the low inner ring 100. That is to say, the high outer ring 101 is higher than the low inner ring 100. The noise reduction filter element 2 is in contact with both the high outer ring 101 and the low inner ring 100.

[0027] Continue reading Figure 5 In one embodiment of this utility model, the short inner ring 100 is an arc-shaped hoop structure, on which a first notch 1000 is provided to connect the inner cavity 5 with the middle cavity 6. The first notch 1000 and the air compressor inlet 103 are located at the two ends of the middle cavity 6, respectively.

[0028] Continue reading Figures 6-8In one embodiment of this utility model, the noise reduction filter element 2 includes a spacer ring 200, an outer flange 201 disposed on the outer rear end of the spacer ring 200, and a filter element body 202 disposed in the spacer ring 200. The spacer ring 200 and the outer flange 201 are preferably integrally injection molded elastic plastics, and the filter element body 202 is preferably a paper filter element. The spacer ring 200 is a cylindrical structure with a shape and size matching the short inner ring 100. The front end face of the spacer ring 200 is attached to the rear end face of the short inner ring 100 and completely covers the rear end face of the short inner ring 100. The attached part prevents air from passing through. The outer flange 201 is an annular structure with a shape and size matching the high outer ring 101. The front end face of the outer flange 201 is attached to the rear end face of the high outer ring 101 and completely covers the rear end face of the high outer ring 101. The attached part prevents air from passing through.

[0029] The air filter base 1 has an inner cavity 5 formed between its front inner wall, the inner wall of the short inner ring 100, the inner wall of the partition ring 200, and the rear side wall of the air filter cover 3. The air filter base 1 has a middle cavity 6 formed between its front inner wall, the outer wall of the short inner ring 100, the outer wall of the partition ring 200, the inner wall of the high outer ring 101, and the rear end face of the outer flange 201. The air filter base 1 has an outer cavity 7 formed between its outer wall, the inner wall of the air filter base 1, and the rear side wall of the air filter cover 3.

[0030] Continue reading Figure 7 In one embodiment of this utility model, a pressure ring 300 is provided on the front side of the air filter cover 3. The shape and size of the pressure ring 300 match the outer flange 201 of the noise reduction filter element 2. The pressure ring 300 presses against the rear end face of the outer flange 201. Two second notches 3000 are provided on the pressure ring 300 to connect the outer cavity 7 and the inner cavity 5. Except for the positions of the second notches 3000, the rest of the pressure ring 300 tightly covers the rear end face of the outer flange 201. Alternatively, the shape and size of the pressure ring 300 can match the rear end face of the spacer ring 200, and the pressure ring 300 presses against the rear end face of the spacer ring 200.

[0031] Continue reading Figure 3 , Figure 5 and Figure 7 In one embodiment of this utility model, the lower end of the air filter base 1 is provided with an interface 102 connected to the connecting pipe 4. The interface 102 is connected to the connecting pipe 4 and the outer cavity 7 respectively. The lower inner wall of the outer cavity 7 of the housing assembly is provided with a guide 104. The guide 104 is a trumpet-shaped structure that is wider at the top and narrower at the bottom. The position of the guide 104 corresponds to the interface 102. The guide 104 is used to guide the airflow entering the outer cavity 7 through the interface 102 to the left and right sides of the outer ring 101.

[0032] After installation, the front end of the spacer ring 200 of the noise-reducing filter element 2 is fitted with the rear end of the short inner ring 100 of the air filter base 1, forming an inner cavity 5 on the inside. The cavity of the spacer ring 200 is also part of the inner cavity 5. The front end of the outer flange 201 of the noise-reducing filter element 2 is also fitted with the rear end of the high outer ring 101 of the air filter base 1, forming a middle cavity 6 with the space outside the spacer ring 200 of the noise-reducing filter element 2. The outer side of the high outer ring 101 of the base 1 is the outer cavity 7. The connecting tube 4 is inserted into the interface 102 of the air filter base 1 and fixed with glue.

[0033] Before using the air filter, first use screws to fix the air filter base 1 to the air inlet of the air compressor, and then install the noise reduction filter element 2 and the air filter cover 3 in sequence. The four notches on the outside of the air filter cover 3 should engage with the four protrusions on the top and bottom of the outside of the air filter base 1 to complete the installation. If you need to replace the air filter, you can pry open the air filter cover 3.

[0034] like Figure 7 As shown by the dashed arrow, air enters the outer cavity 7 of the air filter from the bottom of connection 4, and then enters the inner cavity 5 through the second notch 3000 of the pressure ring 300 on the air filter cover 3. It then enters the middle cavity 6 through the first notch 1000 of the short inner ring 100 on the air filter base 1. After circling the middle cavity 6 for 3 / 4 of a turn, it enters the air compressor inlet 103.

[0035] The noise propagates in the opposite direction to the air intake. The noise is reflected and consumed in the inner cavity 5, middle cavity 6, and outer cavity 7, and decreases significantly after reaching the outlet.

[0036] The above structure avoids the risk of the air filter falling off during use and significantly reduces the noise of the air compressor.

[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 noise-reducing air filter for an air compressor, characterized in that, The housing assembly includes a noise reduction filter (2) disposed in the housing assembly and a connecting pipe (4) connected to the housing assembly. The cavity of the housing assembly is divided into an inner cavity (5), a middle cavity (6) and an outer cavity (7) by the noise reduction filter (2). The middle cavity (6) surrounds the inner cavity (5), and the outer cavity (7) surrounds the middle cavity (6). The outer cavity (7) is connected to the inner cavity (5) and the cavity of the connecting pipe (4) respectively. The inner cavity (5) is connected to the middle cavity (6). The housing assembly is also provided with an air compressor inlet (103) connected to the middle cavity (6).

2. The noise-reducing air filter for an air compressor according to claim 1, characterized in that, The housing assembly includes a filter base (1) and a filter cover (3) that are connected to each other. A high outer ring (101) and a low inner ring (100) are provided on the front inner wall of the air filter base (1) opposite to the air filter cover (3). The high outer ring (101) surrounds the low inner ring (100), and the rear end of the high outer ring (101) extends beyond the rear end of the low inner ring (100). The noise reduction filter element (2) is in contact with both the high outer ring (101) and the low inner ring (100). The inner wall of the low inner ring (100) forms an inner cavity (5). A middle cavity (6) is formed between the outer wall of the low inner ring (100) and the inner wall of the high outer ring (101). The outer wall of the high outer ring (101) forms an outer cavity (7).

3. The noise-reducing air filter for an air compressor according to claim 2, characterized in that, The short inner ring (100) is provided with a first notch (1000) that connects the inner cavity (5) and the middle cavity (6). The first notch (1000) and the air compressor inlet (103) are located at the two ends of the middle cavity (6), respectively.

4. A noise-reducing air filter for an air compressor according to claim 2, characterized in that, The noise reduction filter element (2) includes a spacer (200), an outer flange (201) disposed on the outer edge of the rear end of the spacer (200), and a filter element body (202) disposed in the spacer (200). The shape and size of the spacer (200) match the short inner ring (100), and the front end face of the spacer (200) is in contact with the rear end face of the short inner ring (100). The shape and size of the outer flange (201) match the high outer ring (101), and the front end face of the outer flange (201) is in contact with the rear end face of the high outer ring (101).

5. A noise-reducing air filter for an air compressor according to claim 4, characterized in that, A pressure ring (300) is provided on the front side of the air filter cover (3). The shape and size of the pressure ring (300) match the rear end face of the spacer ring (200) and / or the rear end face of the outward flange (201). The pressure ring (300) presses against the rear end face of the spacer ring (200) and / or the rear end face of the outward flange (201).

6. A noise-reducing air filter for an air compressor according to claim 5, characterized in that, The pressure ring (300) is provided with a second notch (3000) that connects the outer cavity (7) and the inner cavity (5).

7. A noise-reducing air filter for an air compressor according to claim 2, characterized in that, The high outer ring (101) is a circular ring structure, and / or the low inner ring (100) is an arc structure.

8. A noise-reducing air filter for an air compressor according to claim 4, characterized in that, The spacer (200) is a cylindrical structure.

9. A noise-reducing air filter for an air compressor according to claim 2, characterized in that, The housing assembly is provided with an interface (102) connected to the connecting pipe (4). A guide (104) is provided in the outer cavity (7) of the housing assembly. The position of the guide (104) corresponds to the interface (102). The guide (104) is used to guide the airflow entering the outer cavity (7) through the interface (102) to the left and right sides of the outer ring (101).

10. A noise-reducing air filter for an air compressor according to claim 1, characterized in that, The air filter is a square air filter.

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