Self-cleaning air filter for air compressor

Abstract

The utility model provides a self-cleaning air filter for an air compressor, which comprises a shell and a filter element, the filter element and the shell are in clearance fit to form a filter flow channel for adsorbing dust, and the self-cleaning air filter further comprises an air storage tank. The input end of the gas storage tank is connected with the gas outlet of the oil separation barrel through a first connecting pipe, and the output end of the gas storage tank penetrates through and extends into the filter element cavity through a second connecting pipe. According to the self-cleaning filter element connecting system, an existing air compressor connecting system is additionally installed and transformed, internal source compressed air of the air compressor is used for conducting high-pressure blowing on the interior of the filter element, dust and impurities adhering to the outer surface of the filter element can be effectively blown off, effective self-cleaning can be conducted on the filter element in a relatively lossless mode, and the service life of the filter element is prolonged. The service life of the filter element is prolonged while the filtering effect of the filter element is enhanced, and the labor cost of later maintenance of the air filter device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a self-cleaning air filter for an air compressor Background Art

[0002] With the acceleration of the industrialization process, the application scenarios of air compressors are becoming more and more extensive. In some application conditions with a large dust content, the air filter in the air compressor is very easy to be blocked. When dust enters the main engine of the air compressor, it is easy to cause the lubricating oil to coke and the main engine to get stuck, or cause the oil-gas filter and the oil separation core to be blocked, resulting in a reduction in the oil intake of the main engine and an increase in the main engine temperature. Therefore, during use, it is necessary to frequently clean the dust on the surface of the filter element to improve the overall performance and durability of the air compressor unit. In the air compressor industry, in the prior art, a pre-filter with a large flux is usually added at the front of the unit. The fiber filter element used in the pre-filter also needs to be replaced regularly, or the outer surface of the filter element is manually cleaned regularly to achieve the purpose of extending the service life of the pre-filter. Using a pre-filter still requires regular manual maintenance, which also increases the use cost. Therefore, there is an urgent need for a self-cleaning air filter for an air compressor to effectively solve the problem of dust accumulation in the air filter element Summary of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a self-cleaning air filter for an air compressor, which overcomes the problems that the existing air filter for an air compressor is easy to be blocked and cannot achieve self-cleaning under application conditions with a large dust content

[0004] To solve the above technical problems, the utility model provides a self-cleaning air filter for an air compressor, which includes a machine shell and a filter element. A filter flow channel for adsorbing dust is formed by the clearance fit between the filter element and the machine shell. It also includes an air storage tank. The input end of the air storage tank is connected to the air outlet of the oil separation barrel through a first connecting pipe, and its output end extends through the second connecting pipe into the filter element cavity. A first control valve is arranged on the first connecting pipe, and a second control valve is arranged on the second connecting pipe

[0005] An air inlet and an air outlet are arranged on the machine shell. In the filtering state, air enters the filtering channel along the air inlet, passes through the filter element, and enters the air compressor along the air outlet. In the cleaning state, the compressed gas circulated into the air storage tank enters the filter element cavity along the second connecting pipe and is discharged outward against the air inlet direction

[0006] In a preferred embodiment: the first control valve is a check valve

[0007] In a preferred embodiment: the second control valve is a solenoid valve

[0008] In a preferred embodiment: the air storage tank is a pressure vessel

[0009] In a preferred embodiment, a safety valve is provided on the pressure vessel.

[0010] In a preferred embodiment, the diameter of the first connecting pipe is smaller than that of the second connecting pipe.

[0011] In a preferred embodiment, the nominal inner diameter of the first connecting pipe is not greater than 6 mm.

[0012] In a preferred embodiment, the nominal inner diameter of the second connecting pipe is not greater than 35 mm.

[0013] Compared with the prior art, the technical solution of the present utility model has the following beneficial effects:

[0014] The present utility model provides a self-cleaning air filter for an air compressor. By retrofitting on the basis of the existing air compressor connection system and using the internal source compressed air of the air compressor to conduct high-pressure purging on the inside of the filter element, the dust and impurities adhering to the outer surface of the filter element can be effectively purged and dropped. The filter element can be effectively self-cleaned relatively without damage, while enhancing the filtering effect of the filter element and prolonging its service life, and reducing the labor cost of the later maintenance of the air filter device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a system connection perspective view of the air filter of the present utility model;

[0016] Figure 2 is a front view of an air compressor configured with the air filter of the present utility model;

[0017] Figure 3 is a top view of an air compressor configured with the air filter of the present utility model;

[0018] Figure 4 is an axonometric view of an air compressor configured with the air filter of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] Reference Figures 1-4 As shown, this embodiment is modified and installed on the basis of the existing air compressor connection system. The internal compressed air of the air compressor can be used to effectively self-clean the filter element relatively without loss, so as to enhance the filtering effect of the filter element and extend its service life at the same time. Specifically, the air filter includes a casing 10 with a filter element 11 embedded inside, and a gas storage tank 6 with one end connected to the air outlet 9 of the oil separator barrel Y through a first connecting pipe and the other end extending through a second connecting pipe into the cavity of the filter element 11. The gas storage tank 6 is used to shunt and store the pressure gas from the air compressor K, and is a pressure vessel used to reverse blow and wash the filter element 11 in the air filter after the air compressor K stops working.

[0023] In terms of the external structure, an air inlet 4 and an air outlet 9 are provided on the casing 10. A filter element 11 inside it is in clearance fit with the casing 10 to form a filtration flow path for adsorbing dust. Air enters the filtration flow path through the air inlet 4 on the casing 10. During the process of moving through the filter element 11 towards the air outlet 9, dust particles are adsorbed and intercepted on the outer surface of the filter element 11, while the gas passes through the filter element 11 and enters the air compressor K through the air outlet 9 for volume compression. The compressed gas then enters the oil separator barrel Y for oil-gas separation. Subsequently, the separated clean compressed gas is sent to the gas-using equipment along the air outlet of the oil separator barrel Y. In this embodiment, a first connecting pipe 2 is connected and arranged through a elbow joint 1 at the air outlet of the oil separator barrel Y. A first control valve 3 is arranged at the end of the first connecting pipe 2. The first control valve 3 is a check valve. The separated clean compressed gas is shunted into the air storage tank 6 along the first connecting pipe 2 and accumulates in the air storage tank 6. With the operation of the air compressor K, continuous compressed gas is shunted into the air storage tank 6, making the air pressure in the air storage tank 6 and the air pressure in the oil separator barrel Y gradually tend to be stable. To ensure the use safety of the air flow circuit, a safety valve 5 is provided on the air storage tank 6 in this embodiment. In addition, a second connecting pipe 7 is connected and arranged at the output end of the air storage tank 6. A second control valve 8 is arranged on the second connecting pipe 7. The second control valve 8 is an electromagnetic valve. When the air compressor K is in the working state, the electromagnetic valve is in the closed state. After the air compressor K stops working, the electromagnetic valve is started in real time. The air filter changes from the filtering state to the self-cleaning state. The compressed gas in the air storage tank 6 enters the inside of the filter element 11 along the second connecting pipe 7, and flushes and oscillates the filter element 11 from the inside to the outside, so that the dust particles accumulated on the surface of the filter element 11 are separated from the filter element 11. The pressure air flow continuously flushes the filter element 11 along the spraying direction of the second connecting pipe 7 and carries the dust outwards along the air inlet 4.

[0024] As an external component of the air compressor K system, considering its use safety, in this embodiment, not only a safety valve 5 is provided on its body to control the pressure relief adjustment of the surplus pressure gas, but also the pipe diameters of the first connecting pipe 2 and the second connecting pipe 7 connected to it are parameter-set. Specifically, in this embodiment, the nominal inner diameter of the first connecting pipe 2 is set within 6 mm. By accessing the compressed gas source through a small pipe diameter, the pressure accumulation rate of the air storage tank 6 can be regulated, avoiding safety accidents caused by the rapid increase of the air pressure in the tank in a short time. In addition, considering that the air storage tank 6 is the power source for the self-cleaning of the air filter, the air supply source needs to be controlled within a predetermined intensity to ensure a good self-cleaning effect. In view of this, the nominal inner diameter of the second connecting pipe 7 is set within 35 mm in this embodiment. By increasing the output pipe diameter, the volume of the pressure air flow reaching the inside of the filter element 11 per unit time increases, improving the air supply intensity and ensuring the self-cleaning effect.

[0025] As described above, it is only the preferred specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model who makes non-substantive modifications to the present utility model using this concept shall fall within the scope of infringement of the protection scope of the present utility model.

Claims

1. A self-cleaning air filter for an air compressor, comprising a housing and a filter element. A filtering flow channel for adsorbing dust is formed by the clearance fit between the filter element and the housing, and is characterized in that; It further includes an air storage tank. The input end of the air storage tank is connected to the air outlet of the oil separator barrel through a first connecting pipe, and its output end extends through a second connecting pipe into the filter element cavity. A first control valve is provided on the first connecting pipe, and a second control valve is provided on the second connecting pipe; An air inlet and an air outlet are provided on the machine shell. In the filtering state, air enters the filtering channel along the air inlet, passes through the filter element, and then enters the air compressor along the air outlet; In the cleaning state, the compressed gas circulated into the air storage tank enters the filter element cavity along the second connecting pipe and is discharged outward against the air inlet direction.

2. The self-cleaning air filter for an air compressor according to claim 1, characterized in that: The first control valve is a one-way valve.

3. The self-cleaning air filter for an air compressor according to claim 1, wherein: The second control valve is a solenoid valve.

4. The self-cleaning air filter for an air compressor according to claim 1, wherein: The air storage tank is a pressure vessel.

5. The self-cleaning air filter for an air compressor according to claim 4, characterized in that: A safety valve is provided on the pressure vessel.

6. The self-cleaning air filter for an air compressor according to claim 1, wherein: The diameter of the first connecting pipe is smaller than that of the second connecting pipe.

7. The self-cleaning air filter for an air compressor according to claim 1, wherein: The nominal inner diameter of the first connecting pipe is not greater than 6 mm.

8. The self-cleaning air filter for an air compressor according to claim 1, wherein: The nominal inner diameter of the second connecting pipe is not greater than 35 mm.

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