Air filter for oilless air compressor

Abstract

The air filter for the oilless air compressor comprises a front-end filter and a rear-end filter which are connected and matched with each other, the cyclone separator is arranged at the front end and comprises a separator upper cover, a separation device and an ash storage box which are connected in sequence; the rear-end filter comprises a filter upper cover, a filter main body and a mounting seat which are matched with one another; wherein the separator upper cover and the filter upper cover are integrated into an integral structure, the separating device is a conical cavity, the upper end of the separating device is connected with the separator upper cover, and the lower end of the separating device is connected with the ash storage box; the filter upper cover is connected with the filter body, the filter body is installed on the installation base, the structure is simple, installation is convenient, and the filtering effect is good.

Description

Technical Field

[0001] The utility model relates to the field of air compressors, in particular to an air filter for oil-free air compressors. Background Art

[0002] At present, most oil-free air compressors on the market need to be installed with 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 in the air to ensure that the gas entering from the air inlet of the air compressor is dry and dust-free, thereby preventing moisture from corroding machine parts and dust from clogging, which affects the service life of the air compressor.

[0003] Most manufacturers' air filters on the market use a sponge + filter element structure to filter dust and moisture. The advantages are low cost and simple structure, and the disadvantage is that they require regular maintenance and replacement.

[0004] In the use field of oil-free air compressors, the impact of the environment also has a great relationship on the efficiency and life of the air filter. Especially in some heavy dust environments, the filtration efficiency of the air filter is not high, and the filter element needs to be cleaned frequently; most oil-free air compressor manufacturers on the market use the method of installing two filters. The air is first filtered from large particles of dust or impurities from the first-stage filter, and then connected to the second-stage filter through a pipe to filter out fine particles of dust and water vapor, etc., and then the pipe is connected to the air inlet of the oil-free air compressor; and the internal structure still uses the sponge + filter element method for filtering, and the filtering effect is not good.

[0005] In addition, most air filters on the market are still made of iron plate stamping + welding; the size deviation is large and the failure rate is high, and the appearance is not beautiful. Utility Model Content

[0006] The utility model aims to solve the above problems in the prior art and to provide an air filter for an oil-free air compressor cylinder, which has a simple structure, is easy to install and has a good filtering effect.

[0007] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0008] An air filter for an oil-free air compressor comprises a front filter and a rear filter which are connected and matched with each other; the front end is a cyclone separator, comprising a separator upper cover, a separation device and an ash storage box which are connected in sequence; the rear filter comprises a filter upper cover, a filter body and a mounting seat which are matched with each other; wherein the separator upper cover and the filter upper cover are integrated into an integral structure, the separation device is a conical cavity, the upper end of which is connected to the separator upper cover, and the lower end is connected to the ash storage box; the filter upper cover is connected to the filter body, and the filter body is mounted on the mounting seat.

[0009] Furthermore, the cyclone separator includes a separator cover, a separation device, an ash storage box, an air inlet pipe and an overflow pipe that cooperate with each other; wherein, the separator cover is a cylinder, the ash storage box is a box, the separation device is a conical cavity body respectively connected with the separator cover and the ash storage box, the air inlet pipe and the overflow pipe are arranged on the separator cover, the air inlet pipe and the separator cover are vertically connected to allow air to enter the separator cover, the overflow pipe is arranged at the center of the top cover of the separator cover, the lower end is connected with the inner cavity of the separator cover, the top is closed, and the side is connected with the filter cover.

[0010] Furthermore, the rear end filter is a two-stage filtering structure, one end of the filter body is connected to the filter cover, two layers of filter cotton and a filter core are arranged in sequence in the filter body, and the other end of the filter body is provided with an air outlet pipe connected thereto.

[0011] Furthermore, the filter body and filter cover of the rear filter are both cylindrical structures, which are arranged vertically with the cyclone separator. The mounting seat is an elastic clamping ring structure, and the bottom end of the clamping ring extends outward to form a clamping seat. The mounting seat is clamped and fixed on the outer edge of the filter body.

[0012] Furthermore, the separator cover of the cyclone separator cooperates with the separation device by means of a slot, that is, an inner annular groove is made on the separator cover, and an outer boss is made on the separation device. The annular groove and the boss cooperate to make the separator cover and the separation device cooperate tightly.

[0013] Furthermore, a buckle plate is provided at the bottom of the ash storage tank for easy disassembly and cleaning. The ash storage tank and the buckle plate are matched with a card groove structure. A ring groove boss is provided at the bottom of the ash storage tank. The ring groove boss is provided with two symmetrical notches, and a small boss corresponding to the notch is provided on the buckle plate. The two are matched by first aligning the buckle plate with the notch and then rotating it half a circle to allow the small boss to rotate to the middle of the ring groove boss of the ash storage tank, that is, "one buckle and one rotation", thereby starting the match.

[0014] Furthermore, the rear filter upper cover is connected to the filter body by snap fit.

[0015] Furthermore, the rear filter has two guide grooves on the outer edge of the filter body for fine-tuning the position of the mounting seat.

[0016] Furthermore, a latch slot is provided at the bottom of the mounting base, and the mounting base is fixed with a latch to ensure easy disassembly.

[0017] After adopting the above scheme, the utility model has the following advantages:

[0018] 1. The air filter is divided into two parts. The front end (first stage) is a cyclone separator, which is used to filter out coarse dust and other larger particles in the air; the rear end (second stage) is a common filter device, which is used to filter out fine particles and water vapor in the remaining air. The dust removal method of the cyclone separator is that when the gas is centrifugally rotating, the dust particles in the airflow will be separated from the airflow due to the action of centrifugal force; it has the advantages of simple structure, low cost and operating cost, and high separation efficiency for dust larger than 10μm.

[0019] 2. Eliminate unnecessary accessories, such as connecting hoses, clamps, etc.; integrate the front end (first stage) directly on the second stage filter, reduce the pipe assembly problem between the two stages, reduce the failure repair rate and reduce costs;

[0020] 3. The air filter is injection molded and made of plastic. Compared with the iron shell, it has lower cost, lower failure rate and more beautiful appearance.

[0021] 4. When the gas passes through the front end of the air filter (stage 1), it will fall into the ash storage tank at the bottom due to the action of centrifugal force + gravity. The ash storage tank is easy to disassemble, which is convenient and simple for customers to clean frequently. The air filter (stage 2) adopts snap-fit; the air filter element and fine filter cotton are installed inside to further ensure the dust removal efficiency and make it reach a higher level.

[0022] Compared with the dust removal method of adding air filters on the market, this patent uses centrifugal force + gravity to remove dust, which is more efficient and low-cost; integrating the front-end cyclone separator with the rear-end standard filter can reduce the cost and failure rate of the intermediate connecting pipelines, and it is more like a whole, reducing the cumbersome installation problems for customers.

[0023] The air filter is made of plastic, which has a more beautiful appearance, lower cost and lower failure rate than the iron material commonly used on the market.

[0024] The ash storage tank and the separator are matched in the form of a card slot, which is easy to manufacture and low in cost. It is also convenient for customers to disassemble, that is, the dust in the ash storage tank can be cleaned with just "one button and one twist".

[0025] Eliminating external pipelines (such as air intake hoses, integrated air intake pipelines, etc.) can further reduce costs; eliminating external pipelines can eliminate the sealing performance, waterproof performance, assembly errors, etc. caused by external air intake pipelines, reduce the failure maintenance rate, further reduce costs, and increase machine life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2It is a schematic diagram of the exploded structure of the utility model;

[0028] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0029] Figure 4 This is a schematic diagram of the main structure of the filter of the utility model;

[0030] Figure 5 This is a schematic diagram of the cooperation between the separator upper cover and the separation device of the utility model;

[0031] Figure 6 This is a schematic diagram of the cooperation between the bottom of the ash storage tank and the gusset plate of the utility model;

[0032] Figure 7 It is a schematic diagram of a mounting seat of the utility model. DETAILED DESCRIPTION

[0033] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0034] like Figure 1-7 As shown in the figure, the air filter for oil-free air compressor is divided into two parts: the front end is a cyclone separator 1, and the rear end is a standard filter 2; the front end cyclone separator 1 is divided into a separator cover 3, a separation device 4 and an ash storage box 5; the rear end standard filter 2 is also divided into a filter cover 6, a filter body 7, and a mounting seat 8. (As shown in the figure Figure 1 , Figure 2 )

[0035] The separator upper cover 3 of the front cyclone separator and the filter upper cover 6 of the rear standard filter 2 are integrated into one body, which reduces the pipeline connection problem between the front cyclone separator 1 and the rear standard filter 2, and is both beautiful and reduces costs.

[0036] The air filter is made of plastic, which has the characteristics of lower cost, higher dimensional accuracy and easier molding than iron.

[0037] The cyclone separator 1 includes a separator upper cover 3, a separation device 4, an ash storage box 5, an air inlet pipe 9 and an overflow pipe 20 that cooperate with each other; wherein, the separator upper cover 3 is a cylinder, the ash storage box 5 is a box body, the separation device 6 is a conical cavity body respectively connected with the separator upper cover 3 and the ash storage box 5, the air inlet pipe 9 and the overflow pipe 20 are arranged on the separator upper cover, the air inlet pipe 9 and the separator upper cover 3 are vertically connected to allow air to enter the separator upper cover, the overflow pipe 20 is arranged at the center of the top cover of the separator upper cover 3, the lower end is connected with the inner cavity of the separator upper cover 3, the upper part is closed, and the side is connected with the filter upper cover 6.

[0038] The rear filter 2 is a two-stage filtering structure. One end of the filter body 7 is connected to the filter upper cover 6. Two layers of filter cotton 10 and a filter core 11 are arranged in the filter body 7 in sequence. The other end of the filter body 7 is provided with an air outlet pipe 12 connected thereto.

[0039] The filter body 7 and the filter cover 6 of the rear filter 2 are both cylindrical structures, which are arranged vertically with the cyclone separator 1. The mounting seat 8 is an elastic clamping ring structure, and the bottom end of the clamping ring extends outward to form a clamping seat. The mounting seat 8 is clamped on the outer edge of the filter body 7 and fixed.

[0040] The dust removal principle of the air filter is as follows: after the external dust-containing gas enters from the air inlet 9 of the front cyclone separator 1, the airflow is forced to rotate from top to bottom due to the flow restriction of the outer cylindrical cover 3 and the inner cylindrical wall. Centrifugal force is formed during the rotation of the airflow. Under the action of centrifugal force, the dust particles are gradually thrown to the outer wall, and rotate and fall along the outer wall under the action of gravity until they reach the ash storage box 5. The rotating and descending external vortex 19 gradually converges to the center due to the influence of the cone contraction. When it drops to a certain level, it begins to return and rise, forming a rotational movement from bottom to top. This movement is generally called an internal vortex 18, which flows into the rear standard filter 2 after passing through the overflow pipe 20. Most large dust particles can be filtered out by this internal vortex 18. (such as Figure 3 )

[0041] After the gas flowing out of the front cyclone separator 1 enters the rear standard filter, it will first be further filtered by the second layer of fine filter 10 cotton, then enter the filter cavity, and then the filter element 11 will filter out water vapor, small particles of dust, etc., and then flow out from the filter outlet 12; thus, clean air is obtained. Figure 4 )

[0042] This invention patent has three dust removal measures. The first one is to discharge large particles of dust and most of the particle dust by means of centrifugal force + gravity. The second one is to further filter through two layers of fine filter cotton 11. Finally, the few remaining dust may be filtered through the filter element 11. Through these three dust removal measures, basically all the dust is filtered out, so as to obtain clean and dust-free gas.

[0043] In the specific structure, the upper cover 3 of the front cyclone separator and the separation device 4 are matched with a slot, that is, the upper cover 3 of the separator is made into an inner ring groove 13, and the separation device is made into an outer boss 14, as shown in the figure; this matching method can make the upper cover 3 of the separator and the separation device 4 fit tightly and not easy to fall off. ( Figure 5 )

[0044] A buckle plate 15 is provided at the bottom of the ash storage tank 5. When the dust separated from the separation device accumulates to a certain level, it must be cleaned. Considering the convenience of disassembly for employees to clean, a card slot structure 16 is provided, that is, the ash storage tank 5 is provided with an annular groove boss, and the annular groove boss is provided with two symmetrical notches, and the buckle plate 15 is provided with two small bosses corresponding to the notches. The two cooperate in that the buckle plate is first aligned with the notch and put into it and then rotated half a circle, so that the small boss is rotated to the middle of the annular groove boss of the ash storage tank, that is, "one buckle and one rotation", thereby starting the cooperation; due to the restriction of the annular groove boss of the ash storage tank, the buckle plate is not easy to fall off; the use of this method of cooperation is not only low-cost, simple to make and convenient to disassemble. ( Figure 6 )

[0045] The rear end standard filter cover 6 is connected to the filter body 7 by a conventional snap fit; considering that the internal air filter element 11 and the silencer cotton 10 need to be replaced frequently, it is convenient to replace when disassembled, and it is also a more mature structure; its material is different from most filters on the market, it is a plastic material, that is, it is injection molded by a mold (most filters on the market are iron and stamped). Compared with stamping, this mold injection molding method has the advantages of lower cost, more beautiful appearance, and lower failure rate. ( Figure 2 )

[0046] Two guide grooves 21 are provided on the rear standard filter to fine-tune the position of the mounting angle 8. Figure 2 )

[0047] A latch groove 17 is provided at the bottom of the mounting angle 8, which can be fixed with a latch 22, has a simple structure and is easy to disassemble.

[0048] Compared with the dust removal method of adding air filters on the market, this patent uses centrifugal force + gravity to remove dust, which is more efficient and low-cost; integrating the front-end cyclone separator with the rear-end standard filter can reduce the cost and failure rate of the intermediate connecting pipelines, and it is more like a whole, reducing the cumbersome installation problems for customers.

[0049] The air filter is made of plastic, which has a more beautiful appearance, lower cost and lower failure rate than the iron material commonly used on the market.

[0050] The ash storage tank and the separator are matched in the form of a card slot, which is easy to manufacture and low in cost. It is also convenient for customers to disassemble, that is, the dust in the ash storage tank can be cleaned with just "one button and one twist".

[0051] Eliminating external pipelines (such as air intake hoses, integrated air intake pipelines, etc.) can further reduce costs; eliminating external pipelines can eliminate the sealing performance, waterproof performance, assembly errors, etc. caused by external air intake pipelines, reduce the failure maintenance rate, further reduce costs, and increase machine life.

[0052] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. Air filter for oil-free air compressor, characterized in that: It includes a front-end filter and a rear-end filter which are connected and matched with each other; the front end is a cyclone separator, which includes a separator upper cover, a separation device and an ash storage box which are connected in sequence; the rear-end filter includes a filter upper cover, a filter body and a mounting seat which are matched with each other; wherein the separator upper cover and the filter upper cover are integrated into an integral structure, the separation device is a conical cavity, the upper end of which is connected to the separator upper cover, and the lower end is connected to the ash storage box; the filter upper cover is connected to the filter body, and the filter body is mounted on the mounting seat.

2. The air filter for an oil-free air compressor according to claim 1, characterized in that: The cyclone separator includes a separator upper cover, a separation device, an ash storage box, an air inlet pipe and an overflow pipe that cooperate with each other; wherein, the separator upper cover is a cylinder, the ash storage box is a box body, the separation device is a conical cavity body respectively connected with the separator upper cover and the ash storage box, the air inlet pipe and the overflow pipe are arranged on the separator upper cover, the air inlet pipe and the separator upper cover are vertically connected to allow air to enter the separator upper cover, the overflow pipe is arranged at the center of the top cover of the separator upper cover, the lower end is connected with the inner cavity of the separator upper cover, the upper part is closed, and the side is connected with the filter upper cover.

3. The air filter for an oil-free air compressor according to claim 1 or 2, characterized in that: The rear end filter is a two-stage filter structure. One end of the filter body is connected to the filter cover. Two layers of filter cotton and a filter core are arranged in sequence in the filter body. The other end of the filter body is provided with an air outlet pipe connected to it.

4. The air filter for an oil-free air compressor according to claim 3, characterized in that: The filter body and filter cover of the rear filter are both cylindrical structures, which are arranged vertically with the cyclone separator. The mounting seat is an elastic clamping ring structure, and the bottom end of the clamping ring extends outward to form a clamping seat. The mounting seat is clamped and fixed on the outer edge of the filter body.

5. The air filter for an oil-free air compressor according to claim 2, characterized in that: The separator upper cover of the cyclone separator and the separation device are matched by a slot, that is, the separator upper cover is made with an inner ring groove, and the separation device is made with an outer boss. The ring groove and the boss cooperate to make the separator upper cover and the separation device fit tightly.

6. The air filter for an oil-free air compressor according to claim 2, characterized in that: A buckle plate is provided at the bottom of the ash storage tank for easy disassembly and cleaning. The ash storage tank and the buckle plate are matched with a card slot structure. There is an annular groove boss at the bottom of the ash storage tank. The annular groove boss is provided with two symmetrical notches, and a small boss corresponding to the notch is provided on the buckle plate. The two are matched by first aligning the buckle plate with the notch and then rotating it half a circle to allow the small boss to rotate to the middle of the annular groove boss of the ash storage tank, that is, "one buckle and one rotation", thereby starting the match.

7. The air filter for an oil-free air compressor according to claim 4, characterized in that: The connection between the rear filter upper cover and the filter body is achieved by snap fit.

8. The air filter for an oil-free air compressor according to claim 4, characterized in that: The rear filter has two guide grooves on the outer edge of the filter body for fine-tuning the position of the mounting seat.

9. The air filter for an oil-free air compressor according to claim 4, characterized in that: A latch slot is provided at the bottom of the mounting base, which is fixed with a latch to ensure easy disassembly.

Images