Air filter for air compressor

Abstract

The utility model relates to air filter technical field, concretely is an air filter for air compressor, including filter body, the inside fixed of filter body is equipped with outer filter drum, the inside fixed of outer filter drum is equipped with inner filter drum, the top of filter body is equipped with gas guide pipe along vertical sliding, the bottom of gas guide pipe stretches into outer filter drum and inner filter drum, and gas guide pipe is used for guiding gas into outer filter drum or inner filter drum. The utility model discloses two inner and outer distribution filter drums are arranged in the filter, and two filter drums are separated into two air chambers by cooperating with the isolating cover, the height where the gas guide hole is changed by the lifting of gas guide pipe, makes the gas guide hole can guide air into two air chambers respectively, reaches the purpose of using different filter drums, makes one filter drum after using a period of time, the height of gas guide pipe can be changed to use another filter drum by staff, prolongs the service life of whole filter, reduces the frequency of replacing filter drum.

Description

Technical Field

[0001] This utility model relates to the field of air filter technology, specifically an air filter for an air compressor. Background Technology

[0002] Air filters are key components in compressor systems used to purify intake air. Their core function is to remove impurities from the air, ensuring that the air entering the compressor is clean, thereby protecting the internal components of the compressor, improving operating efficiency, and extending the equipment's lifespan.

[0003] Existing air filters can be referenced from utility model patent CN222585873U, which discloses a gas compressor air filter, including a filtration mechanism; a sealing device including a sealing strip; sealing strips installed on the clamping arc surfaces of the first and second clamping plates; lifting grooves formed on the upper and lower end faces of both the first and second clamping plates; a bidirectional screw rod rotatably installed inside the screw hole; lifting plates installed inside each lifting groove; lifting plates sleeved outside the cross-section of the bidirectional screw rod; and fasteners fixed to the ends of the lifting plates. This patent, through the sealing device, reduces the probability of filter leakage, ensuring both the sealing and filtration effects of the filter.

[0004] However, the filters in the aforementioned patents are similar to most filters, with only a single-layer filter cartridge inside. After the compressor has been used for a period of time, a large amount of impurities will accumulate on the filter cartridge, requiring cleaning or replacement. Since a single filter cartridge has a relatively short lifespan, this leads to increased frequency of filter cartridge replacement and maintenance for users, increasing their workload. Therefore, we propose an air filter for air compressors to effectively solve the above-mentioned drawbacks. Utility Model Content

[0005] The purpose of this invention is to provide an air filter for an air compressor to solve the problems mentioned in the background art.

[0006] This utility model is achieved through the following technical solution: an air filter for an air compressor, comprising a filter body, the filter body having an internal hollow structure, an outer filter cartridge fixedly disposed inside the filter body, an inner filter cartridge fixedly disposed inside the outer filter cartridge, a guide pipe slidably disposed at the top of the filter body along a vertical direction, the bottom end of the guide pipe extending into the outer filter cartridge and the inner filter cartridge, the guide pipe being used to guide gas into the outer filter cartridge or the inner filter cartridge.

[0007] Optionally, an isolation cover is fixedly provided inside the outer filter cartridge. The isolation cover is located between the outer filter cartridge and the inner filter cartridge. The outer filter cartridge and the isolation cover form a first air chamber, and the inner filter cartridge and the isolation cover form a second air chamber.

[0008] Optionally, the outer filter cartridge has a U-shaped cross-section and a vent hole at its bottom, which is connected to the second air chamber. The isolation cover has a U-shaped cross-section and its bottom is fixedly connected to the inner bottom wall of the outer filter cartridge. The inner filter cartridge has a U-shaped cross-section and its top is fixedly connected to the inner top wall of the isolation cover. The isolation cover encloses the inner filter cartridge.

[0009] Optionally, the bottom end of the air guide tube is a closed structure, and an air guide hole is provided on the side of the air guide tube; when the air guide hole is located in the first air chamber, the air guide tube is used to introduce gas into the first air chamber, and when the air guide hole is located in the inner filter cartridge, the air guide tube is used to introduce gas into the second air chamber.

[0010] Optionally, the air guide tube is slidably connected vertically to the top wall of the outer filter cartridge and the top wall of the inner filter cartridge. The top end of the air guide tube extends above the filter body and is fixedly provided with a limiting plate. A limiting sleeve is detachably connected to the outside of the air guide tube. The limiting sleeve is located between the bottom surface of the limiting plate and the top surface of the filter body.

[0011] Optionally, when the bottom surface of the limiting plate abuts against the top surface of the limiting sleeve, the air guide hole is located in the first air chamber; when the bottom surface of the limiting plate abuts against the top surface of the filter body, the air guide hole is located in the inner filter cylinder.

[0012] Compared with the prior art, the present invention provides an air filter for an air compressor, which has the following advantages:

[0013] This invention features two filter cartridges arranged inside and outside the filter, with an isolation cover separating the two cartridges into two air chambers. By adjusting the height and position of the air inlet by raising and lowering the air guide pipe, air can be introduced into the two air chambers separately, allowing the use of different filter cartridges. This also allows the operator to adjust the height of the air guide pipe to use the other filter cartridge after one cartridge becomes clogged, thereby extending the overall lifespan of the filter and reducing the frequency of filter cartridge replacement. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a front sectional view of the present invention;

[0016] Figure 3 This is a front sectional view of the inner and outer filter cartridges, air guide tube, and isolation cover of this utility model;

[0017] Figure 4This is a schematic diagram showing the disassembled structure of the inner and outer filter cartridges, air guide tube, and isolation cover of this utility model.

[0018] In the diagram: 1. Filter body; 2. Outer filter cartridge; 201. Vent hole; 3. Inner filter cartridge; 4. Air guide pipe; 401. Air guide hole; 402. Limiting plate; 403. Limiting sleeve; 5. Isolation cover; 501. First air chamber; 502. Second air chamber. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1 - Figure 4 An air filter for an air compressor includes a filter body 1, which has a hollow internal structure. An outer filter cartridge 2 is fixedly installed inside the filter body 1, and an inner filter cartridge 3 is fixedly installed inside the outer filter cartridge 2. An air guide pipe 4 is slidably installed vertically at the top of the filter body 1, and its bottom end extends into the outer filter cartridge 2 and the inner filter cartridge 3. The air guide pipe 4 is used to guide gas into either the outer filter cartridge 2 or the inner filter cartridge 3. This allows the air guide pipe 4 to change the airflow direction, enabling the air to be filtered and purified by either the outer filter cartridge 2 or the inner filter cartridge 3. After one filter cartridge has been used for a period of time, another filter cartridge can be selected for continued use, thereby extending the filter's service life and reducing the frequency of filter cartridge replacement.

[0021] The outer filter cartridge 2 has a U-shaped cross-section when viewed from the front, and its outer side wall is fixedly connected to the inner side wall of the filter body 1 via a support rod, which is not shown in the accompanying drawings. Preferably, the outer filter cartridge 2 can be detachably connected to the support rod for maintenance and replacement of the outer filter cartridge 2.

[0022] On the other hand, the top cover of the outer filter cartridge 2 and the side wall of the outer filter cartridge 2 are detachably connected, such as by magnetic attraction, snap-fit ​​connection or flange connection, so that the top cover of the outer filter cartridge 2 can be opened, thereby facilitating the installation of the inner filter cartridge 3 inside the outer filter cartridge 2.

[0023] Furthermore, an isolation cover 5 is fixedly provided inside the outer filter cartridge 2. The isolation cover 5 is located between the outer filter cartridge 2 and the inner filter cartridge 3. The outer filter cartridge 2 and the isolation cover 5 form a first air chamber 501, and the inner filter cartridge 3 and the isolation cover 5 form a second air chamber 502, so that the isolation cover 5 can divide the space between the outer filter cartridge 2 and the inner filter cartridge 3 into two spaces, thereby allowing air to be filtered from different spaces.

[0024] Specifically, the isolation cover 5 has a U-shaped cross-section. The bottom of the isolation cover 5 is fixedly connected to the inner bottom wall of the outer filter cartridge 2. The inner filter cartridge 3 has a U-shaped cross-section, and the top of the inner filter cartridge 3 is fixedly connected to the inner top wall of the isolation cover 5. The isolation cover 5 encloses the inner filter cartridge 3. Furthermore, the bottom of the outer filter cartridge 2 has a vent hole 201, which connects the vent hole 201 to the second air chamber 502. This ensures that air entering either the first air chamber 501 or the second air chamber 502 is ultimately discharged to the outside of the outer filter cartridge 2 for use by the compressor.

[0025] The outer filter cartridge 2 and the inner filter cartridge 3 have several air vents on their side walls to allow air to pass through. Both the first air chamber 501 and the outer filter cartridge 2 can be equipped with filter structures similar to those in existing filters, such as polyester fiber non-woven fabric and activated carbon adsorption layers, to adsorb and filter fine impurities, thereby improving the filtration effect. When air enters the first air chamber 501, it passes through the air vents on the outer filter cartridge 2 and then enters the compressor from the bottom of the filter body 1. When air enters the inner filter cartridge 3, it passes through the air vents on the inner filter cartridge 3 and enters the second air chamber 502 (both inner and outer filter cartridges 2), then exits through the vent 201 to the outside of the outer filter cartridge 2, and finally enters the compressor from the bottom of the filter body 1. Therefore, users can achieve the purpose of using different filter cartridges for filtration by changing the air inlet area.

[0026] To make the gas guiding process of the gas guide tube 4 more specific, the bottom end of the gas guide tube 4 in this application is a closed structure, and a gas guide hole 401 is opened on the side of the gas guide tube 4; when the gas guide hole 401 is located in the first gas chamber 501, the gas guide tube 4 is used to introduce gas into the first gas chamber 501; when the gas guide hole 401 is located in the inner filter cartridge 3, the gas guide tube 4 is used to introduce gas into the second gas chamber 502.

[0027] The air guide pipe 4 is slidably connected vertically to the top wall of the outer filter cartridge 2 and the top wall of the inner filter cartridge 3. Both the top walls of the outer filter cartridge 2 and the inner filter cartridge 3 have through holes for inserting the air guide pipe 4. An annular sealing ring is fixed to each through hole. The outer wall of the air guide pipe 4 and the sealing ring are tightly sealed to ensure no air leakage. Furthermore, the air guide pipe 4 can slide vertically within the sealing ring, thereby changing the height of the air guide hole 401 and thus changing the airflow direction.

[0028] In this embodiment, the top end of the air duct 4 extends above the filter body 1 and is fixedly provided with a limiting plate 402. A limiting sleeve 403 is detachably connected to the outside of the air duct 4. The limiting sleeve 403 is located between the bottom surface of the limiting plate 402 and the top surface of the filter body 1. The limiting sleeve 403 is made of a material with good deformation ability, such as plastic. When the limiting sleeve 403 is fitted onto the outside of the air duct 4, it can prevent the limiting plate 402 from moving downward. When the limiting sleeve 403 is removed, the limiting plate 402 can drive the air duct 4 to descend.

[0029] Specifically, when the bottom surface of the limiting plate 402 abuts against the top surface of the limiting sleeve 403, the air guide hole 401 is located inside the first air chamber 501. At this time, air is introduced into the first air chamber 501 and filtered and purified by the outer filter cartridge 2. When the bottom surface of the limiting plate 402 abuts against the top surface of the filter body 1, the air guide hole 401 is located inside the inner filter cartridge 3. At this time, air is introduced into the inner filter cartridge 3 and filtered and purified by the inner filter cartridge 3. This allows the inner filter cartridge 3 to achieve the same filtration effect after the outer filter cartridge 2 has been used for a period of time, thereby extending the service life of the device and reducing the replacement frequency of the filter cartridges and filter elements.

[0030] The working principle and usage process of this utility model are as follows: Initially, the limiting sleeve 403 is fitted onto the outside of the air guide tube 4, preventing the limiting plate 402 from descending. At this time, the air guide hole 401 is located within the first air chamber 501, allowing air to enter the first air chamber 501 through the air guide hole 401. Subsequently, the air is filtered and purified by the filter structure within the first air chamber 501 and the outer filter cartridge 2, and discharged through the vent hole on the side wall of the outer filter cartridge 2 for use by the compressor. After the outer filter cartridge 2 has been used for a period of time, its filtration and purification effect decreases. At this time, the limiting sleeve 403 can be removed, and the limiting plate 402 can be pressed downwards until it is flush with the top surface of the filter body 1, allowing the air guide hole 401 to enter the inner filter cartridge 3. Air then enters the inner filter cartridge 3 through the air guide hole 401, subsequently entering the second air chamber 502 through the vent hole on the side wall of the inner filter cartridge 3, and finally exiting through the vent hole 201 for use by the compressor.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0032] 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. An air filter for an air compressor, comprising a filter body (1), characterized in that: The filter body (1) has a hollow internal structure. An outer filter cylinder (2) is fixedly arranged inside the filter body (1). An inner filter cylinder (3) is fixedly arranged inside the outer filter cylinder (2). A gas guide pipe (4) is slidably arranged vertically at the top end of the filter body (1). The bottom end of the gas guide pipe (4) extends into the outer filter cylinder (2) and the inner filter cylinder (3). The gas guide pipe (4) is used to introduce gas into the outer filter cylinder (2) or the inner filter cylinder (3).

2. An air filter for an air compressor according to claim 1, characterized in that: An isolation cover (5) is fixedly arranged inside the outer filter cylinder (2). The isolation cover (5) is located between the outer filter cylinder (2) and the inner filter cylinder (3). A first gas chamber (501) is formed between the outer filter cylinder (2) and the isolation cover (5). A second gas chamber (502) is formed between the inner filter cylinder (3) and the isolation cover (5).

3. An air filter for an air compressor according to claim 2, characterized in that: The cross-sectional shape of the outer filter cylinder (2) is in the shape of a rectangle with a missing side. An air release hole (201) is opened at the bottom of the outer filter cylinder (2). The air release hole (201) is communicated with the second gas chamber (502). The cross-sectional shape of the isolation cover (5) is in the shape of an inverted U. The bottom of the isolation cover (5) is fixedly connected to the inner bottom wall of the outer filter cylinder (2). The shape of the inner filter cylinder (3) is in the shape of a U. The top of the inner filter cylinder (3) is fixedly connected to the inner top wall of the isolation cover (5). The isolation cover (5) covers the inner filter cylinder (3).

4. An air filter for an air compressor according to claim 2, characterized in that: The bottom end of the gas guide pipe (4) is of a closed structure. A gas guide hole (401) is opened on the side surface of the gas guide pipe (4). When the gas guide hole (401) is located in the first gas chamber (501), the gas guide pipe (4) is used to introduce gas into the first gas chamber (501). When the gas guide hole (401) is located inside the inner filter cylinder (3), the gas guide pipe (4) is used to introduce gas into the second gas chamber (502).

5. An air filter for an air compressor according to claim 4, characterized in that: The gas guide pipe (4) is slidably connected to the top wall of the outer filter cylinder (2) and the top wall of the inner filter cylinder (3) vertically. The top end of the gas guide pipe (4) extends above the filter body (1) and is fixedly provided with a limiting plate (402). A limiting sleeve (403) is detachably connected to the outside of the gas guide pipe (4). The limiting sleeve (403) is located between the bottom surface of the limiting plate (402) and the top surface of the filter body (1).

6. An air filter for an air compressor according to claim 5, characterized in that: When the bottom surface of the limiting plate (402) abuts against the top surface of the limiting sleeve (403), the gas guide hole (401) is located in the first gas chamber (501). When the bottom surface of the limiting plate (402) abuts against the top surface of the filter body (1), the gas guide hole (401) is located inside the inner filter cylinder (3).

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