Air drying and filtering system of air compressor

Abstract

The utility model relates to air filtration, and provides an air drying and filtering system of an air compressor, which comprises a pre-filter, an oil removal filter, a three-way assembly, a drying assembly, a one-way valve assembly and a pressure maintaining valve which are connected in sequence, the three-way assembly comprises a first drying tower and a second drying tower which are arranged in parallel. The air drying and filtering system of the air compressor can efficiently filter and dry air in the air compressor.

Description

Technical Field

[0001] The utility model relates to the technical field of air filtration, and in particular to an air drying and filtering system for an air compressor. Background Art

[0002] An air compressor is a device used to compress gas. Its construction is similar to that of a water pump. Most air compressors use a reciprocating piston mechanism with rotating vanes or a rotating screw. The piston, vanes, or screw inside the compressor, which compresses the air, are typically driven by an electric motor.

[0003] During the operation of the air compressor, the motor drives the piston to move, thereby sucking in and pressurizing the outside air. Therefore, even if a relevant filtering device is installed at the air inlet, it is inevitable that some difficult-to-filter water, oil or small particles of impurities will enter. Therefore, they need to be further filtered to prevent them from affecting the normal operation of the air compressor. After a certain period of filtration, the traditional filtration system needs to clean the internal molecular sieve (molecular sieve can be used to adsorb liquid impurities such as water and oil, and other filter media can also be used). This will not only affect the normal operation of the air compressor, but also have a certain impact on downstream production. Therefore, it is necessary to design an air compressor gas treatment system that can filter efficiently. Utility Model Content

[0004] The purpose of the utility model is to provide an air drying and filtering system for an air compressor, which can filter and dry the gas in the air compressor with high efficiency.

[0005] The embodiment of the present invention is realized through the following technical scheme: the air drying and filtering system of the air compressor of the present invention includes a pre-filter, an oil removal filter, a three-way assembly, a drying assembly, a one-way valve assembly and a pressure maintaining valve connected in sequence; the three-way assembly includes a first drying tower and a second drying tower arranged in parallel.

[0006] Furthermore, a first branch and a second branch arranged in parallel are provided between the one-way valve assembly and the pressure maintaining valve.

[0007] Furthermore, a post-filter is provided on the first branch.

[0008] Furthermore, the second branch is provided with a heater, a dew point detector, and a pressure reducing valve in sequence.

[0009] Furthermore, the three-way assembly includes a first solenoid valve and a second solenoid valve arranged in parallel, and the first solenoid valve and the second solenoid valve are both connected to the outlet end of the oil removal filter; the outlet end of the first solenoid valve is connected to the inlet end of the first drying tower, and the outlet end of the second solenoid valve is connected to the inlet end of the second drying tower.

[0010] Furthermore, the one-way valve assembly includes a pair of first valves arranged in parallel at the outlet end of the first drying tower, and a pair of second valves arranged in parallel at the outlet end of the second drying tower; one first valve is connected to one second valve, the first branch is arranged between one of the first valves and the second valve, and the second branch is arranged between the other first valve and the second valve.

[0011] Furthermore, dampers are provided at the inlet and outlet ends of the first drying tower and the second drying tower.

[0012] Furthermore, the damper includes a shell, a first baffle fixedly arranged in the shell, a plurality of first air holes opened on the first baffle, an air vent tube arranged at the first air hole, a second baffle slidably arranged in the shell, a plurality of blockages arranged on the second baffle, a plurality of second air holes opened on the second baffle, a spring arranged at a position of the second baffle away from the first baffle, and a fixing ring connected to the spring away from the second baffle; the blockage corresponds one-to-one to the first air hole; the fixing ring is fixedly connected to the inner wall of the shell; the second air hole does not overlap with the blockage.

[0013] Furthermore, the inner diameter of the air-permeable tube at one end close to the blocking block is larger than the inner diameter of the other end; the diameter of the block at one end close to the air-permeable tube is smaller than the diameter of the other end.

[0014] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects: the air drying and filtering system of the air compressor of the utility model, when in use, passes through the pre-filter, oil removal filter, three-way assembly, drying assembly, one-way valve assembly and pressure maintaining valve in sequence and is discharged, wherein the pre-filter is mainly used to filter large particles of impurities, the oil removal filter is mainly used to filter most of the oil and gas in the air, and then passes through the three-way assembly to enter the first drying tower (or second drying tower) in the drying assembly, where the remaining impurities and oil and water in the air are further adsorbed, and finally discharged through the pressure maintaining valve. During the whole process, the first drying tower and the second drying tower play the main role in adsorbing impurities. When the adsorption capacity of the first drying tower is insufficient, it can be switched to the second drying tower through the three-way assembly, and then the first drying tower can be cleaned and regenerated, etc., which can effectively ensure the filtration efficiency of the air and reduce the time of downtime (or power reduction) for drying tower regeneration. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic structural diagram of an air drying and filtering system for an air compressor provided in an embodiment of the present utility model;

[0017] Figure 2 A schematic structural diagram of the damper portion provided in an embodiment of the present utility model;

[0018] Figure 3 This is a schematic structural diagram of the second baffle portion provided in an embodiment of the present utility model.

[0019] Icons: 11-pre-filter, 12-oil removal filter, 13-first solenoid valve, 14-second solenoid valve, 15-first drying tower, 16-second drying tower, 17-pressure holding valve, 18-first branch, 19-second branch, 110-post-filter, 111-heater, 112-dew point detector, 113-pressure reducing valve, 114-first valve, 115-second valve, 20-damper, 21-housing, 22-first baffle, 23-first air vent, 24-air vent pipe, 25-second baffle, 26-second air vent, 27-block, 28-spring, 29-fixing ring. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0023] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0024] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0025] Example

[0026] The following is further described in conjunction with specific embodiments. Figure 1 -Attached Figure 3As shown, the air drying and filtering system of the air compressor of this embodiment includes a pre-filter 11, an oil removal filter 12, a three-way assembly, a drying assembly, a one-way valve assembly, and a pressure-maintaining valve 17 connected in sequence; the three-way assembly includes a first drying tower 15 and a second drying tower 16 arranged in parallel. Specifically, when in use, the air passes through the pre-filter 11, the oil removal filter 12, the three-way assembly, the drying assembly, the one-way valve assembly, and the pressure-maintaining valve 17 in sequence and is then discharged. The pre-filter 11 is mainly used to filter large particles of impurities, and the oil removal filter 12 is mainly used to filter most of the oil and gas in the air. Then, after passing through the three-way assembly, the air enters the first drying tower 15 (or the second drying tower 16) in the drying assembly, where the remaining impurities and oil and water in the air are further adsorbed, and finally, the air is discharged through the pressure-maintaining valve 17. During the entire process, the first drying tower 15 and the second drying tower 16 play a major role in adsorbing impurities. When the adsorption capacity of the first drying tower 15 is insufficient, it can be switched to the second drying tower 16 through the three-way assembly, and then the first drying tower 15 can be cleaned and regenerated. This can effectively ensure the filtration efficiency of the air and reduce the time for downtime (or power reduction) for drying tower regeneration. It should be noted that the pre-filter 11, the oil removal filter 12, the first drying tower 15 and the second drying tower 16 can use traditional drying and filtering equipment, and the pre-filter 11 mainly filters solid impurities through structures such as filter cotton or filter elements, and the oil removal filter 12 mainly uses filter media such as filter cotton to filter, adsorb or absorb impurities such as oil and water. The first drying tower 15 and the second drying tower 16 mainly use molecular sieves to adsorb impurities such as oil and water in the gas.

[0027] In this embodiment, a first branch 18 and a second branch 19 are provided in parallel between the one-way valve assembly and the pressure maintaining valve 17. A post-filter 110 is provided on the first branch 18. A heater 111, a dew point detector 112, and a pressure reducing valve 113 are provided on the second branch 19 in sequence. Specifically, the first branch 18 and the second branch 19 are isobaric, wherein the post-filter 110 provided on the first branch 18 is used to ensure that the gas does not contain impurities as much as possible, the heater 111 provided on the second branch 19 is used to heat the gas, the dew point detector 112 is used to monitor the gas in real time, and the pressure reducing valve 113 is used to adjust the air pressure, etc. The gases in the first branch 18 and the second branch 19 are finally discharged together after passing through the pressure maintaining valve 17. The post-filter 110 has a similar structure to the pre-filter 11, but has a different filtration accuracy. The post-filter 110 has a higher filtration accuracy.

[0028] The three-way assembly in this embodiment includes a first solenoid valve 13 and a second solenoid valve 14 arranged in parallel. Both the first solenoid valve 13 and the second solenoid valve 14 are connected to the outlet of the oil removal filter 12. The outlet of the first solenoid valve 13 is connected to the inlet of the first drying tower 15, while the outlet of the second solenoid valve 14 is connected to the inlet of the second drying tower 16. Specifically, the first solenoid valve 13 and the second solenoid valve 14 together form a three-way structure. When the first drying tower 15 is to be used, the first solenoid valve 13 is opened and the second solenoid valve 14 is closed. When the second drying tower 16 is to be used, the second solenoid valve 14 is opened and the first solenoid valve 13 is closed.

[0029] The one-way valve assembly in this embodiment includes a pair of first valves 114 disposed in parallel at the outlet of the first drying tower 15, and a pair of second valves 115 disposed in parallel at the outlet of the second drying tower 16. One first valve 114 is connected to one second valve 115, with a first branch 18 disposed between one of the first and second valves 114, 115, and a second branch 19 disposed between the other first and second valves 114, 115. Specifically, in this manner, gas in both the first and second drying towers 15, 16 can be discharged simultaneously into the first and second branches 18, 19.

[0030] In this embodiment, dampers 20 are provided at the inlet and outlet ends of the first drying tower 15 and the second drying tower 16. Specifically, during use, due to the switching process between the first drying tower 15 and the second drying tower 16, the first drying tower 15 and the second drying tower 16 may be impacted by high-pressure gas each time they begin to take in air, thereby affecting the adsorbent inside the drying towers. The provision of dampers 20 effectively prevents sudden impacts from high-pressure gas.

[0031] The damper 20 in this embodiment includes a shell 21, a first baffle 22 fixedly arranged in the shell 21, a plurality of first air holes 23 opened on the first baffle 22, an air vent tube 24 arranged at the first air hole 23, a second baffle 25 slidably arranged in the shell 21, a plurality of blocking blocks 27 arranged on the second baffle 25, a plurality of second air holes 26 opened on the second baffle 25, a spring 28 arranged at a position of the second baffle 25 away from the first baffle 22, and a fixing ring 29 connected to the spring 28 away from the second baffle 25; the blocking blocks 27 correspond one-to-one to the first air holes 23; the fixing ring 29 is fixedly connected to the inner wall of the shell 21; the second air hole 26 does not overlap with the blocking blocks 27. Specifically, after the gas enters the shell 21 of the damper 20 from one end of the second baffle 25, it passes through the second air vent 26 and the first air vent 23 in sequence and then enters the first drying tower 15 (or the second drying tower 16). When the pressure difference at both ends of the shell 21 is large, the gas will suddenly impact the second baffle 25, causing the second baffle 25 to approach the first baffle 22. At this time, the gap between the block 27 and the air vent 24 is reduced, and the flow rate of the gas through the first air vent 23 will be reduced. At this time, the impact on the first drying tower 15 (or the second drying tower 16) is significantly reduced. When the air pressure at both ends of the second baffle 25 gradually decreases until it is balanced, the pressure on the second baffle 25 is reduced, and it returns to its previous position under the action of the spring 28. At this time, the airflow through the damper 20 is least obstructed and the flow rate is maximum.

[0032] In this embodiment, the inner diameter of the air vent tube 24 near the block 27 is larger than the inner diameter of the other end; the diameter of the block 27 near the air vent tube 24 is smaller than the diameter of the other end. Specifically, the movement of the second baffle 25 can more significantly adjust the air flow.

[0033] In summary, the air drying and filtration system of the air compressor of this embodiment, during use, passes through the pre-filter 11, the oil removal filter 12, the tee assembly, the drying assembly, the one-way valve assembly, and the pressure-maintaining valve 17, before being discharged. The pre-filter 11 primarily filters large particles of impurities, and the oil removal filter 12 primarily filters the majority of the oil and gas in the air. The air then passes through the tee assembly and enters the first drying tower 15 (or second drying tower 16) of the drying assembly, where it further adsorbs the remaining impurities, oil, and water in the air. Finally, the air is discharged through the pressure-maintaining valve 17. Throughout this process, the first drying tower 15 and the second drying tower 16 play the primary role in adsorbing impurities. When the adsorption capacity of the first drying tower 15 is insufficient, the air can be switched to the second drying tower 16 via the tee assembly, allowing the first drying tower 15 to be cleaned and regenerated. This effectively ensures air filtration efficiency and reduces downtime (or power reduction) for drying tower regeneration.

[0034] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An air drying and filtering system for an air compressor, characterized in that: It comprises a pre-filter (11), an oil removal filter (12), a three-way assembly, a drying assembly, a one-way valve assembly and a pressure maintaining valve (17) which are connected in sequence; The three-way assembly comprises a first drying tower (15) and a second drying tower (16) arranged in parallel.

2. The air drying and filtering system for an air compressor according to claim 1, characterized in that: A first branch (18) and a second branch (19) are provided in parallel between the one-way valve assembly and the pressure maintaining valve (17).

3. The air drying and filtering system for an air compressor according to claim 2, characterized in that: A post-filter (110) is provided on the first branch (18).

4. The air drying and filtering system for an air compressor according to claim 2, characterized in that: The second branch (19) is provided with a heater (111), a dew point detector (112), and a pressure reducing valve (113) in sequence.

5. The air drying and filtering system for an air compressor according to claim 1, characterized in that: The three-way assembly comprises a first solenoid valve (13) and a second solenoid valve (14) arranged in parallel, wherein the first solenoid valve (13) and the second solenoid valve (14) are both connected to the outlet end of the oil removal filter (12); the outlet end of the first solenoid valve (13) is connected to the inlet end of the first drying tower (15), and the outlet end of the second solenoid valve (14) is connected to the inlet end of the second drying tower (16).

6. The air drying and filtering system for an air compressor according to claim 2, characterized in that: The one-way valve assembly includes a pair of first valves (114) arranged in parallel at the outlet end of the first drying tower (15), and a pair of second valves (115) arranged in parallel at the outlet end of the second drying tower (16); A first valve (114) is connected to a second valve (115), the first branch (18) is arranged between one of the first valves (114) and the second valve (115), and the second branch (19) is arranged between another of the first valves (114) and the second valve (115).

7. The air drying and filtering system for an air compressor according to claim 1, characterized in that: The inlet and outlet ends of the first drying tower (15) and the second drying tower (16) are both provided with dampers (20).

8. The air drying and filtering system for an air compressor according to claim 7, characterized in that: The damper (20) comprises a housing (21), a first baffle (22) fixedly arranged in the housing (21), a plurality of first air holes (23) opened on the first baffle (22), an air vent (24) arranged at the first air holes (23), a second baffle (25) slidably arranged in the housing (21), a plurality of blocking blocks (27) arranged on the second baffle (25), a plurality of second air holes (26) opened on the second baffle (25), a spring (28) arranged at a position of the second baffle (25) away from the first baffle (22), and a fixing ring (29) connected to the spring (28) at a position away from the second baffle (25); The blocking block (27) corresponds to the first vent hole (23) one by one; the fixing ring (29) is fixedly connected to the inner wall of the shell (21); and the second vent hole (26) does not overlap with the blocking block (27).

9. The air drying and filtering system for an air compressor according to claim 8, characterized in that: The inner diameter of one end of the vent tube (24) close to the block (27) is larger than the inner diameter of the other end; the diameter of one end of the vent tube (24) close to the block (27) is smaller than the diameter of the other end.

Images