Air cleaner for oil-free air compressor

Abstract

The utility model discloses an air filter for oilless air compressor, including air filter body, the front end of air filter body is detachably installed with upper cover, the inside installation of air filter body has filter core, the upper detachable cover of upper cover has rain cap body, be provided with air inlet on rain cap body, and the airflow passes air inlet and enters the inner chamber of upper cover downwards, the inside installation of upper cover has baffle, and the below of baffle is equipped with air inlet groove, and the inside of air inlet groove is installed with interlayer board, and is equipped with overflow port on interlayer board, and the inside installation of interlayer board has filter tow, and filter tow sets up in the air intake front end of filter core, and the bottom of upper cover is equipped with dust hole. The utility model increases the function of air filter waterproof, can better apply in some special occasion or special weather, and the suitability is stronger, and only need to pull the hook buckle to complete the disassembly replacement when maintaining, need not to help any other tool, and can maintain at any time and anywhere.

Description

Technical Field

[0001] This utility model relates to the field of air compressor equipment, and in particular to an air filter for an oil-free air compressor. Background Technology

[0002] Currently, most oil-free air compressors on the market require one or more air filters. The air filter is installed at the front end of the air inlet of the oil-free air compressor. Its function is to filter out moisture and dust from the air, ensuring that the air entering the air compressor is dry and dust-free. This prevents moisture from corroding machine parts and dust from clogging them, thus affecting the service life of the air compressor. Most manufacturers' air filters on the market use a combination of sponge and filter element to filter dust and moisture. The advantages are low cost and simple structure, but the disadvantages are the need for regular maintenance and replacement. Secondly, most air filters are made of stamped and welded iron plates, so there is a risk of rusting during vehicle washing, leading to air filter failure. Thirdly, most air filters have a relatively complex structure, with some connections made by bolts, resulting in complicated and inconvenient disassembly and repair procedures. This can easily lead to incorrect assembly of parts and damage, resulting in higher repair costs.

[0003] Therefore, there is an urgent need in this field for an air filter for oil-free air compressors that can solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an air filter for an oil-free air compressor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an air filter for an oil-free air compressor, comprising an air filter body, a detachable ground cover installed at the front end of the air filter body, a filter element installed inside the air filter body, a rain cap body detachably covered above the ground cover, an air inlet provided on the rain cap body, and airflow entering the inner cavity of the ground cover downward through the air inlet; The upper cover has a baffle installed inside, and an air inlet groove is provided below the baffle. A sandwich plate is installed on the inward side of the air inlet groove. An outlet is provided on the sandwich plate. Filter cotton is installed inside the sandwich plate. The filter cotton is located at the air inlet front end of the filter element. Dust discharge hole is provided at the bottom of the upper cover. The air filter body has an air outlet pipe at its rear end. During assembly, the air filter body and the top cover are fastened together to form an integral unit. After assembly, the air filter body is tilted upwards.

[0006] Preferably, the rain cap body includes a rain cap head, a blade layer and a base. The circular periphery of the rain cap head is provided with a snap-fit ​​groove, and the circular periphery of the base is provided with a first protrusion that engages with the snap-fit ​​groove. During assembly, the rain cap head covers the outside of the base. The blade layer includes at least two layers of blades, with adjacent upper and lower layers of blades being staggered, and the blade layer is installed inside the base; The base has a connecting plate in the center with a slot. The top of the cover has a connecting seat and a second protrusion around its circumference. During assembly, the slot on the connecting plate engages with the second protrusion.

[0007] Preferably, the baffle is cylindrical and is pressed against the inner wall of the front end of the upper cover.

[0008] Preferably, the sandwich panel is fitted into the inside of the upper cover by an interference fit until its bottom abuts against the inner side of the baffle.

[0009] Preferably, a hook is installed on the outer side of the top cover, and a locking step is installed on the air filter body. The rear end of the locking step is provided with a hook groove for hook engagement.

[0010] Preferably, a limiting rib is installed on the side of the air filter body near the air outlet pipe, one end of the filter element is fixed by the limiting rib, and the other end is equipped with a filter element limiting cover; during assembly, the filter element limiting cover is simultaneously inserted into the upper cover.

[0011] Preferably, the air filter body is sleeved on the mounting bracket, and the bottom mounting surface of the mounting bracket that contacts the air filter body has an upward slope.

[0012] Preferably, the outer circumferential surface of the air filter body is provided with a limiting groove, and the mounting surface of the mounting bracket is provided with a third protrusion, which engages with the limiting groove during assembly.

[0013] Preferably, the mounting bracket is a side-opening type. After the third protrusion aligns and engages with the limiting groove, the two sides of the mounting bracket are locked and fixed by bolts.

[0014] Preferably, a sealing ring for sealing is provided at the junction of the air filter body and the upper cover.

[0015] Preferably, the air filter is manufactured by injection molding and is made of plastic.

[0016] The technical effects and advantages of this utility model are as follows: 1. This air filter is made of plastic, which is more aesthetically pleasing, cheaper, and has a lower failure rate than the commonly used iron material on the market; it also effectively isolates the risk of parts rusting. 2. Compared with the problem of water ingress in air filters on the market, this utility model adds a waterproof function to the air filter, which makes it more suitable for use in some special occasions or special weather conditions. 3. Compared with the proprietary filter elements used in air filters from various manufacturers on the market, this utility model uses a universal filter element, which is convenient for customers to purchase, repair and replace. 4. This air filter integrates the front cyclone top cover with the rear standard filter body, which can reduce the cost and failure rate of intermediate connecting pipes, and is more like a whole unit, reducing the cumbersome installation problem for customers. 5. This air filter is easy to maintain and disassemble. During maintenance, you only need to turn the hook to complete the disassembly and replacement. No other tools are required, and maintenance can be carried out anytime and anywhere. 6. This air filter has an inclined mounting surface at the bottom of the mounting bracket, which tilts the air filter at a certain angle, allowing dust and water accumulated inside the air filter to flow out more quickly from the dust discharge hole on the top cover. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the present invention when disassembled.

[0018] Figure 2 This is a cross-sectional view of the present invention.

[0019] Figure 3 This is an assembly diagram of the rain cap and top cover of this utility model.

[0020] Figure 4 for Figure 3 A magnified structural diagram of part A in the middle.

[0021] Figure 5 This utility model includes an assembly diagram of the filter element and the air filter body.

[0022] Figure 6 This is a schematic diagram showing the connection between this utility model and an oil-free air compressor.

[0023] In the diagram: Rain cap body 1, rain cap head 11, buckle groove 111, blade layer 12, base 13, first protrusion 131, top cover 2, hook 21, baffle 22, air inlet groove 221, dust outlet 23, connecting seat 24, second protrusion 241, sandwich plate 3, filter cotton 4, filter element limiting cover 5, filter element 6, air filter body 7, hook groove 71, limiting groove 72, air outlet pipe 73, limiting rib 74, mounting bracket 8, third protrusion 81, sealing ring 9. 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. Example

[0025] This utility model provides, for example Figures 1 to 6 The air filter shown is for an oil-free air compressor and is mainly used to remove impurities and purify the air of the oil-free air compressor. It includes an air filter body 7, a detachable top cover 2 installed at the front end of the air filter body 7, a filter element 6 installed inside the air filter body 7, and a rain cap body 1 detachably covered on the top cover 2. The rain cap body 1 is provided with an air inlet, and the airflow enters the inner cavity of the top cover 2 through the air inlet. The upper cover 2 is equipped with a baffle 22 inside. The baffle 22 is provided with an air inlet groove 221 below it, which facilitates the airflow to sink downward under the action of the baffle 22. Then, the airflow enters the sandwich plate 3 at the position of the air inlet groove 221 and enters the inner cavity to achieve filtration. The sandwich plate 3 is installed on the side of the air inlet groove 221 facing inward. The sandwich plate 3 is provided with an outlet. The filter cotton 4 is installed inside the sandwich plate 3. The filter cotton 4 is located at the air inlet front end of the filter element 6. The bottom of the upper cover 2 is provided with a dust discharge hole 23. The air filter body 7 is provided with an air outlet pipe 73 at its rear end. During assembly, the air filter body 7 is fastened to the upper cover 2 to form an integral unit. After assembly, the air filter body 7 is inclined upward.

[0026] Furthermore, to enable the rain cap body 1 to be detachably installed on top of the upper cover 2, the rain cap body 1 includes a rain cap head 11, a blade layer 12, and a base 13. The rain cap head 11 has a snap-fit ​​groove 111 on its circumference, and the base 13 has a first protrusion 131 on its circumference that engages with the snap-fit ​​groove 111. During assembly, the rain cap head 11 covers the outside of the base 13. The blade layer 12 includes at least two layers of blades, with adjacent upper and lower layers of blades staggered. The blade layer 12 is installed inside the base 13. A connecting plate is provided in the center of the base 13, and the connecting plate has a slot. The top of the upper cover 2 is then installed... A connecting seat 24 is provided, and a second protrusion 241 is provided on the outer circumference of the connecting seat 24. During assembly, the slot on the connecting plate engages with the second protrusion 241. This solution mainly achieves a first-level plug-in engagement through the cooperation between the connecting seat 24 and the base 13, and then achieves a second-level plug-in engagement through the cooperation between the rain cap body 11 and the base 13, thus achieving sequential installation. It should be noted that the air inlet in this solution is located at the open arc openings on the left and right sides of the base 13. In this way, the airflow entering the upper cover 2 flows from bottom to top into the base 13, then passes through the rain cap head 11 and is pushed back into the cavity between the blade layer 12 and the base 13, and then enters the upper cover 2. For details, please refer to the appendix. Figure 2 The airflow direction, wherein the material of this utility model is plastic, and it is formed by injection molding, which not only solves the problem of corrosion and rust of parts, but also reduces costs and makes the appearance more beautiful.

[0027] Furthermore, the baffle 22 is cylindrical and is installed by pressing it against the inner wall of the front end of the upper cover 2. The baffle is designed to improve the filtration and screening purpose. After the gas passes through the rain cap body 1, it enters the internal space between the upper cover 2 and the sandwich plate 3. Under the action of the baffle 22, the gas first flows to the bottom and then flows to the top into the sandwich plate 3, flowing to the next place, which facilitates the effective removal of dust and moisture.

[0028] Furthermore, the sandwich panel 3 is fitted into the upper cover 2 by an interference fit until its bottom abuts against and touches the inner side of the baffle 22.

[0029] Furthermore, hooks 21 are installed on the outer side of the upper cover 2. There are at least two hooks 21, which are symmetrically arranged on the outer side of the upper cover 2. A locking step is installed on the air filter body 7. The rear end of the locking step is provided with a hook groove 71 for the hooks 21 to engage. By setting the hooks 21 and the matching hook grooves 71, the upper cover 2 and the air filter body 7 can be prevented from being locked together by bolts. That is, installation can be achieved simply by prying them open and closing them. No tools are needed for disassembly and assembly at any time, making it more convenient and quick to use.

[0030] Furthermore, a limiting rib 74 is installed on the side of the air filter body 7 near the air outlet pipe 73. One end of the filter element 6 is fixed by the limiting rib 74, and the other end is equipped with a filter element limiting cover 5. During assembly, the filter element limiting cover 5 is simultaneously inserted into the upper cover 2. By setting limiting structures at both ends of the filter element 6, the filter element 6 is effectively installed inside the air filter body 7.

[0031] Furthermore, the air filter body 7 is sleeved on the mounting bracket 8, and the bottom mounting surface of the mounting bracket 8 that contacts the air filter body 7 has an upward slope, as detailed below. Figure 3 The mounting surface of the mounting bracket 8 is inclined upwards to make the air filter 7 tilt upwards at a certain angle, so that the dust and water accumulated inside the air filter 7 can flow out more quickly from the dust discharge hole 23 of the top cover 2. It should be noted that the mounting surface of the air filter body 7 in this utility model can be rotated to meet the needs of different customers for multiple installation positions and mounting holes.

[0032] Furthermore, a limiting groove 72 is provided on the outer circumferential surface of the air filter body 7, and a third protrusion 81 is provided on the mounting surface of the mounting bracket 8. The third protrusion 81 engages with the limiting groove 72 during assembly, facilitating the alignment and engagement of the air filter body 7 and the mounting bracket 8. The mounting bracket 8 is a side-opening type. After the third protrusion 81 aligns and engages with the limiting groove 72, the two sides of the mounting bracket 8 are locked and fixed by bolts. By setting the mounting bracket 8 to be a side-opening type, this mounting bracket 8 can be applied to the air filter body 7 with different barrel diameters to achieve the desired installation effect.

[0033] Furthermore, in order to enhance the sealing performance of the upper cover 2 and the air filter body 7 during assembly, a sealing ring 9 is provided at the junction of the air filter body 7 and the upper cover 2 for sealing.

[0034] Furthermore, the waterproofing in this utility model is prevented in two ways: first, the rain cap body 1 is waterproofed by being reversed; second, a baffle 22 is added inside the top cover 2 for filtration and screening.

[0035] Furthermore, the filter element 6 in this solution is a universal model, making it convenient for customers to replace.

[0036] Working principle of this utility model: See appendix for details Figure 2 and 6The air filter body is connected to the air inlet of the oil-free air compressor via a hose. The working principle of the air filter of this utility model is as follows: when the external oil-free air compressor is running, it compresses the gas inside and discharges it. The air filter of this utility model is connected to the air inlet of the oil-free air compressor. When the oil-free air compressor is running, under the influence of the air pressure difference between the inside and outside, the gas enters through the air filter, that is, the oil-free air compressor starts; the air filter operates; when the air compressor is turned off, the air filter stops.

[0037] The gas filtration method of the air filter of this utility model is as follows: under the influence of the pressure difference between the inside and outside of the air, the gas first enters the first line of defense from the outside of the air filter: that is, the rain cap body. The airflow goes from bottom to top through the blade layer, then enters the base cavity, then the connecting seat, and then enters the inner cavity of the top cover. In this process, since the airflow is from bottom to top, it can not only prevent some debris, but also block some rainwater from entering due to the staggered distribution of the blades. After passing through the rain cap body, the gas enters the internal space between the top cover and the sandwich panel, entering the second line of defense. Because this part is equipped with a baffle, and the baffle is blocked at the upper edge and has an air inlet groove at the lower edge, the gas first flows to the bottom under the action of the baffle, and then gradually flows to the upper part into the sandwich panel 3, and flows to the next filter. During the process of the gas flowing from the low position to the high position, some dust, rainwater and other micro particles contained in the gas will fall to the bottom under the action of gravity and then be discharged through the dust discharge hole. After the gas passes through the two lines of defense above and flows out of the sandwich panel, if there is still a small amount of dust or other contaminants in the gas, it will be further purified by the filter cotton in the next step. Finally, after passing through the filter element, clean and dust-free air is obtained and flows to the air outlet, where it is sucked in by the air compressor. In addition, the mounting surface of the mounting bracket is inclined at a certain angle, so that the air filter body is tilted at a certain angle, allowing the dust, water, and other contaminants accumulated inside the air filter body to flow out more quickly from the dust outlet of the top cover.

[0038] This device is easy to disassemble; simply unhook the top cover from the air filter body. It is easy to maintain and disassemble without any tools, allowing for maintenance anytime, anywhere. Furthermore, the filter element is a universal component, resulting in low maintenance costs.

[0039] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air filter for an oil-free air compressor, characterized in that: Includes an air filter body (7), a detachable ground cover (2) is installed at the front end of the air filter body (7), a filter element (6) is installed inside the air filter body (7), a rain cap body (1) is detachably covered on the top cover (2), and an air inlet is provided on the rain cap body (1), through which airflow enters downward into the inner cavity of the top cover (2); The upper cover (2) is equipped with a baffle (22) inside. An air inlet groove (221) is provided below the baffle (22). A sandwich plate (3) is installed on the inward side of the air inlet groove (221). An outlet is provided on the sandwich plate (3). A filter cotton (4) is installed inside the sandwich plate (3). The filter cotton (4) is located at the air inlet front end of the filter element (6). A dust discharge hole (23) is provided at the bottom of the upper cover (2). The air filter body (7) is provided with an air outlet pipe (73) at its rear end. During assembly, the air filter body (7) is fastened to the upper cover (2) to form an integral unit. After assembly, the air filter body (7) is inclined upward.

2. An air filter for an oil-free air compressor according to claim 1, characterized in that: The rain cap body (1) includes a rain cap head (11), a blade layer (12) and a base (13). The rain cap head (11) has a buckle groove (111) on its circumferential part, and the base (13) has a first protrusion (131) on its circumferential part that engages with the buckle groove (111). During assembly, the rain cap head (11) covers the outside of the base (13). The blade layer (12) includes at least two layers of blades, with adjacent upper and lower layers of blades being staggered, and the blade layer (12) is installed inside the base (13); The base (13) has a connecting plate in the center, and the connecting plate has a slot. The top of the cover (2) is equipped with a connecting seat (24), and the outer periphery of the connecting seat (24) is provided with a second protrusion (241). During assembly, the slot on the connecting plate is engaged with the second protrusion (241).

3. An air filter for an oil-free air compressor according to claim 1, characterized in that: The baffle (22) is cylindrical and is installed on the inner front wall of the upper cover (2).

4. An air filter for an oil-free air compressor according to claim 1, characterized in that: The sandwich panel (3) is fitted into the upper cover (2) by an interference fit until its bottom abuts against the inside of the baffle (22).

5. An air filter for an oil-free air compressor according to any one of claims 1-4, characterized in that: The outer side of the top cover (2) is equipped with a hook (21), and the air filter body (7) is equipped with a locking step. The rear end of the locking step is provided with a hook groove (71) for the hook (21) to be fastened.

6. An air filter for an oil-free air compressor according to claim 5, characterized in that: The air filter body (7) is equipped with a limiting rib (74) on the side near the air outlet pipe (73). One end of the filter element (6) is fixed by the limiting rib (74), and the other end is equipped with a filter element limiting cover (5). During assembly, the filter element limiting cover (5) is simultaneously inserted into the upper cover (2).

7. An air filter for an oil-free air compressor according to claim 6, characterized in that: The air filter body (7) is sleeved on the mounting bracket (8), and the bottom mounting surface of the mounting bracket (8) that contacts the air filter body (7) has an upward slope.

8. An air filter for an oil-free air compressor according to claim 7, characterized in that: The outer circumferential surface of the air filter body (7) is provided with a limiting groove (72), and the mounting surface of the mounting bracket (8) is provided with a third protrusion (81). The third protrusion (81) is matched with the limiting groove (72) during assembly.

9. An air filter for an oil-free air compressor according to claim 8, characterized in that: The mounting bracket (8) is a side-opening type. After the third protrusion (81) and the limiting groove (72) are aligned and engaged, the two sides of the mounting bracket (8) are locked and fixed by bolts.

10. An air filter for an oil-free air compressor according to claim 8, characterized in that: A sealing ring (9) for sealing is also provided at the junction of the air filter body (7) and the upper cover (2).

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