Drying mechanism of air compression pump

Abstract

The utility model belongs to the technical field of automobile air suspension systems, and particularly relates to a drying mechanism of an air compression pump, which is good in dehumidification effect. A first molecular sieve is arranged in the first mounting space of the shell, and a second molecular sieve is arranged in the second mounting space of the shell; an air channel for communicating the first mounting space with the second mounting space is arranged in the shell; the shell is provided with a first air nozzle communicated with the air channel, and a throttling valve is installed at the first air nozzle. The shell is provided with a second air nozzle communicated with the first mounting space and a third air nozzle communicated with the second mounting space; the second air tap and the third air tap are both used for being connected with a compressed air outlet of an air compression pump; when the compressed air is dehumidified, the second air nozzle and the third air nozzle are used as air inlet nozzles, and the first air nozzle is used as an air outlet nozzle; when the first molecular sieve and the second molecular sieve are subjected to back flushing and moisture removal, the second air nozzle and the third air nozzle serve as air outlet nozzles, and the first air nozzle serves as an air inlet nozzle.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile air suspension systems, and particularly relates to a drying mechanism of an air compression pump. Background Art

[0002] With the advancement of automotive technology, the use of air suspension systems is becoming increasingly widespread. The core driving component of air suspension is the air compressor pump. The air compressor pump's gas source is atmospheric air. If atmospheric moisture enters the system, it will seriously affect the system's service life. Existing air suspension systems are equipped with a drying mechanism connected to the air compressor pump. This drying mechanism has both drying and regeneration capabilities, and is used to remove atmospheric moisture that enters the air compressor pump.

[0003] A Chinese patent document with authorization announcement number CN215822738U discloses a drying tank body with a one-way device. When the compressed air to be dried is input into the tank body through the top one-way valve, the compressed air can be filtered through the first filter paper at the bottom and fall into the molecular sieve at the bottom. The drying medium in the molecular sieve can absorb moisture from the compressed air. When there is a lot of moisture inside the molecular sieve, dry gas can be pumped in through the bottom flushing port. The dry gas can circulate upward from the inside of the tank body and enter the drying cylinder through the throttle hole at the top of the drying cylinder liner. The dry gas can expel the moisture absorbed by the molecular sieve by blowing on the molecular sieve. Adjusting the valve and throttle hole can effectively increase the backflushing effect of the compressed air on the drying tank, better remove the moisture absorbed by the molecular sieve, and then realize the regeneration function and increase the service life of the drying tank. However, in actual use, there is a technical problem of poor dehumidification effect. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a drying mechanism of an air compression pump with good dehumidification effect.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a drying mechanism of an air compression pump includes a housing, wherein a first installation space and a second installation space are provided in the housing; a first molecular sieve is provided in the first installation space, and a second molecular sieve is provided in the second installation space;

[0006] An air passage for connecting the first installation space and the second installation space is provided in the shell; a first air nozzle connected to the air passage is provided on the shell, and a throttle valve is installed at the first air nozzle; a second air nozzle connected to the first installation space and a third air nozzle connected to the second installation space are provided on the shell; the second air nozzle and the third air nozzle are both used to connect to the compressed air outlet of the air compressor pump; the first air nozzle, the second air nozzle and the third air nozzle are all located at the same end of the shell;

[0007] When dehumidifying compressed air, the second air nozzle and the third air nozzle serve as air inlet nozzles, and the first air nozzle serves as air outlet nozzles; when backflushing the first molecular sieve and the second molecular sieve to remove moisture, the second air nozzle and the third air nozzle serve as air outlet nozzles, and the first air nozzle serves as air inlet nozzle.

[0008] Furthermore, the throttle valve includes a mounting tube with two ends opened and connected to the air passage, wherein a first limit plate, a second limit plate and a sphere are arranged in the mounting tube; one end of the mounting tube is mounted in the first air nozzle, and the other end is located outside the first air nozzle;

[0009] The first limiting plate and the second limiting plate are arranged in pairs along the axial direction of the mounting tube, and the three limiting plates are coaxially arranged; the first limiting plate is located near one end of the mounting tube inside the first gas nozzle, and the second limiting plate is located near the other end of the mounting tube outside the first gas nozzle;

[0010] The first limiting plate is provided with a throttle hole and a first air hole, the first air hole is located in the middle of the first limiting plate, and the throttle hole is located on one side of the first air hole; the second limiting plate is provided with a second air hole deviated from its own center;

[0011] The sphere is installed between the first limiting plate and the second limiting plate, and the diameter of the sphere is smaller than the distance between the first limiting plate and the second limiting plate, and smaller than the inner diameter of the mounting tube; the sphere is used to block or open the first air hole on the first limiting plate.

[0012] Furthermore, a boss is provided in the middle of the second limiting plate, and the boss is located on a side of the second limiting plate adjacent to the first limiting plate; the second air hole is located on the outer side of the boss.

[0013] Furthermore, a plurality of the second air holes are provided, and the plurality of the second air holes are evenly distributed along the circumference of the boss.

[0014] Furthermore, it also includes a first pressing plate and a first pressing spring arranged in the first installation space;

[0015] There are two first pressure plates, one of which is arranged adjacent to the second gas nozzle, and the other is away from the second gas nozzle; the first molecular sieve is located between the two first pressure plates; the first pressure plate is provided with a first through hole connected to the first installation space; the first pressure plate is provided with a first support leg, and the first support leg is located between the back side of the first pressure plate away from the first molecular sieve and the inner wall of the shell; the first compression spring is located between the first pressure plate away from the second gas nozzle and the inner wall of the shell.

[0016] Furthermore, it also includes a first breathable gasket, which is arranged between the first pressing plate and the first molecular sieve.

[0017] Furthermore, it also includes a second pressing plate and a second pressing spring located in the second installation space;

[0018] There are two second pressure plates, one of which is arranged adjacent to the third gas nozzle, and the other is away from the third gas nozzle; the second molecular sieve is located between the two second pressure plates; a second through hole connected to the second installation space is provided on the second pressure plate; a second support leg is provided on the second pressure plate, and the second support leg is located between the back side of the second pressure plate away from the second molecular sieve and the inner wall of the shell; the second clamping spring is located between the second pressure plate away from the third gas nozzle and the inner wall of the shell.

[0019] Furthermore, it also includes a second breathable gasket, which is arranged between the second pressing plate and the second molecular sieve.

[0020] Furthermore, the housing includes a first tank body, a second tank body, a gas pipe, and a cover body arranged in parallel; the first tank body and the second tank body are both barrel structures with one end open; the second gas nozzle is provided at the bottom of the first tank body, and the third gas nozzle is provided at the bottom of the second tank body;

[0021] The open end of the first tank body is connected to the open end of the second tank body via a connecting plate, and the connecting plate is provided with a groove for connecting the inner cavity of the first tank body with the inner cavity of the second tank body;

[0022] The gas pipe is located between the first tank body and the second tank body; one end of the gas pipe is connected to the connecting plate, and the other end of the gas pipe serves as the third gas nozzle; the gas pipe is connected to the inner cavity of the groove;

[0023] The first tank body, the second tank body and the connecting plate are all detachably connected to the cover body; the cover body closes or opens the opening of the groove, the opening of the first tank body and the opening of the second tank body;

[0024] When the cover body closes the opening of the groove, the opening of the first tank body and the opening of the second tank body, the gas delivery channel formed by the inner wall of the cover body and the inner wall of the groove, and the gas delivery pipe together serve as the airway; the inner wall of the cover body and the inner cavity of the first tank body form the first installation space, and the inner wall of the cover body and the inner cavity of the second tank body form the second installation space.

[0025] Furthermore, the outer wall of the gas pipe is connected to the outer wall of the second tank body, and the first tank body is connected to the gas pipe via a reinforcing plate.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a drying mechanism for an air compression pump with good dehumidification effect. First, the air flow direction is optimized to maximize the effective use of the first molecular sieve and the second molecular sieve, thereby improving the dehumidification effect. Second, the space of the air compression pump is coordinated with the space, and the structural design is completed by rationally utilizing the space without significantly affecting the overall size, resulting in a smaller space occupation. Third, when the drying performance of the first molecular sieve and the second molecular sieve is still poor after backflushing, the first molecular sieve and the second molecular sieve can be replaced by opening the cover body, which facilitates disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the gas flow of the present invention when dehumidifying compressed air;

[0028] Figure 2 This is a schematic diagram of the gas flow direction of the present invention when backflushing the first molecular sieve and the second molecular sieve to remove moisture;

[0029] Figure 3 It is a sectional view along the sectional line AA;

[0030] Figure 4 It is a cross-sectional view along the cutting line BB;

[0031] Figure 5 1 is a schematic diagram of the internal structure of the first tank;

[0032] Figure 6 1 is a schematic diagram of the internal structure of the second tank;

[0033] Figure 7 This is a schematic diagram of the gas flow of the throttle valve when dehumidifying the compressed air;

[0034] Figure 8 Schematic diagram of gas flow through the throttle valve when backflushing the first and second molecular sieves for dehumidification;

[0035] Reference numerals: 1-first installation space; 101-first molecular sieve; 2-second installation space; 201-second molecular sieve; 3-first gas nozzle; 4-second gas nozzle; 5-third gas nozzle; 6-throttle valve; 601-installation cylinder; 602-first limiting plate; 6021-throttle hole; 6022-first air hole; 603-second limiting plate; 6031-second air hole; 6032-boss; 604-sphere; 7-first pressure plate; 70 1-first leg; 702-first through hole; 8-first compression spring; 9-first breathable gasket; 10-second pressure plate; 1001-second leg; 1002-second through hole; 11-second compression spring; 12-second breathable gasket; 13-first tank body; 14-second tank body; 15-connecting plate; 1501-groove; 16-air pipe; 17-cover body; 18-reinforcement plate; 19-first sealing ring; 20-second sealing ring. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] The drying mechanism of the air compression pump includes a shell, wherein a first installation space 1 and a second installation space 2 are provided in the shell; a first molecular sieve 101 is provided in the first installation space 1, and a second molecular sieve 201 is provided in the second installation space 2; an air passage for connecting the first installation space 1 and the second installation space 2 is provided in the shell; a first air nozzle 3 connected to the air passage is provided on the shell, and a throttle valve 6 is installed at the first air nozzle 3; a second air nozzle 4 connected to the first installation space 1 and a second air nozzle 5 connected to the first installation space 1 are provided on the shell. The third air nozzle 5 is connected to the second installation space 2; the second air nozzle 4 and the third air nozzle 5 are both used to connect to the compressed air outlet of the air compressor pump; the first air nozzle 3, the second air nozzle 4 and the third air nozzle 5 are all located at the same end of the shell; when dehumidifying the compressed air, the second air nozzle 4 and the third air nozzle 5 serve as the air inlet nozzle, and the first air nozzle 3 serves as the air outlet nozzle; when back-blowing the first molecular sieve 101 and the second molecular sieve 201 to remove moisture, the second air nozzle 4 and the third air nozzle 5 serve as the air outlet nozzle, and the first air nozzle 3 serves as the air inlet nozzle.

[0038] The shell 1 provides installation support for the first molecular sieve 101 and the second molecular sieve 201. The first molecular sieve 101 and the second molecular sieve 201 are used to dry compressed air, which is a prior art. Preferably, the first molecular sieve 101 and the second molecular sieve 201 each include a plurality of spherical molecular sieves, and the diameter of each spherical molecular sieve is 1.8 to 2.5 mm. When dehumidifying the compressed air, the compressed air coming out of the compressed air outlet of the air compressor is passed into the shell 1 through the second air nozzle 4 and the third air nozzle 5, wherein one stream of compressed air enters the first installation space 1 and is dehumidified by the first molecular sieve 101, and the other stream of compressed air enters the second installation space 2 and is dehumidified by the second molecular sieve 201. The dehumidified dry compressed air enters the air duct and is discharged through the first air nozzle 3. The dry compressed air finally enters the air storage tank or the air spring. When the first molecular sieve 101 and the second molecular sieve 201 are back-blown to remove moisture, the gas in the gas tank or the air spring enters the air duct through the throttle valve 6 at the first gas nozzle 3, and then enters the first installation space 1 and the second installation space 2 respectively, and the moisture in the first molecular sieve 101 and the second molecular sieve 201 is brought out to the atmosphere through the second gas nozzle 4 and the third gas nozzle 5 respectively, thereby realizing the regeneration function.

[0039] Preferably, a line connecting the center of the second gas nozzle 4 and the center of the third gas nozzle 5 is taken as a reference line L, and the center of the first gas nozzle 3 deviates from the reference line L.

[0040] Specifically, the throttle valve 6 includes a mounting tube 601 with openings at both ends and connected to the air passage, wherein a first limiting plate 602, a second limiting plate 603 and a sphere 604 are provided in the mounting tube 601; one end of the mounting tube 601 is mounted in the first air nozzle 3, and the other end is located outside the first air nozzle 3; the first limiting plate 602 and the second limiting plate 603 are arranged in pairs along the axial direction of the mounting tube 601, and the three are coaxially arranged; the first limiting plate 602 is close to one end of the mounting tube 601 located in the first air nozzle 3, and the second limiting plate 603 is close to the other end of the mounting tube 601 located outside the first air nozzle 3; the first limiting plate 602 is close to one end of the mounting tube 601 located in the first air nozzle 3, and the second limiting plate 603 is close to the other end of the mounting tube 601 located outside the first air nozzle 3; 02 is provided with a throttling hole 6021 and a first air hole 6022, the first air hole 6022 is located in the middle of the first limiting plate 602, and the throttling hole 6021 is located on one side of the first air hole 6022; the second limiting plate 603 is provided with a second air hole 6031 which is deviated from its own center; the sphere 604 is installed between the first limiting plate 602 and the second limiting plate 603, and the diameter of the sphere 604 is smaller than the distance between the first limiting plate 602 and the second limiting plate 603, and smaller than the inner diameter of the mounting tube 601; the sphere 604 is used to block or open the first air hole 6022 on the first limiting plate 602.

[0041] One end of the mounting tube 601 located in the first air nozzle 3 is connected to the first air nozzle 3 through a card slot block structure or a threaded structure. The mounting tube 601 provides mounting support for the first limiting plate 602, the second limiting plate 603 and the sphere 604. The outer edge of the first limiting plate 602 and the outer edge of the second limiting plate 603 are both welded to the inner wall of the mounting tube 601. The sphere 604 is movably installed in the space between the first limiting plate 602 and the second limiting plate 603. The sphere 604 can be a rubber product, a silicone product, a PVC product, etc., preferably a rubber product. The second air hole 6031 deviates from the center of the second limiting plate 603 itself, and when the sphere 604 abuts against the second limiting plate 603, the sphere 604 is prevented from blocking the second air hole 6031. When dehumidifying the compressed air, the compressed air dried by the first molecular sieve 101 and the second molecular sieve 201 enters the mounting cylinder 601 through the air passage, passes through the throttle hole 6021 and the first air hole 6022, and enters the space between the first limiting plate 602 and the second limiting plate 603. The sphere 604, pushed by the dry compressed air, abuts against the second limiting plate 603, and the dry compressed air is discharged through the second air hole 6031. When back-flushing the first molecular sieve 101 and the second molecular sieve 201 to remove moisture, the back-flushing gas enters the mounting cylinder 601 in the opposite direction, passes through the second air hole 6031, and enters the space between the first limiting plate 602 and the second limiting plate 603. The sphere 604, pushed by the back-flushing gas, blocks the first air hole 6022, and the back-flushing gas enters the air passage through the throttle hole 6021. The throttle valve 6 can control the speed at which the gas is discharged.

[0042] Preferably, a first sealing ring 19 is provided between one end of the mounting tube 601 located in the first gas nozzle 3 and the inner wall of the first gas nozzle 3. The first sealing ring 19 is used to seal the gap between one end of the mounting tube 601 located in the first gas nozzle 3 and the inner wall of the first gas nozzle 3.

[0043] Preferably, a boss 6032 is provided in the middle of the second limiting plate 603, and the boss 6032 is located on the side of the second limiting plate 603 adjacent to the first limiting plate 602. The second air hole 6031 is located outside the boss 6032. When the ball 604 abuts the second limiting plate 603, the ball 604 abuts the boss 6032, thereby improving the discharge efficiency of the dry compressed air.

[0044] Preferably, a plurality of the second air holes 6031 are provided, and the plurality of the second air holes 6031 are evenly distributed along the circumference of the boss 6032 .

[0045] Preferably, the housing further includes a first pressure plate 7 and a first compression spring 8 disposed in the first installation space 1; two first pressure plates 7 are provided, one of which is adjacent to the second gas nozzle 4 and the other is away from the second gas nozzle 4; the first molecular sieve 101 is located between the two first pressure plates 7; the first pressure plate 7 is provided with a first through hole 702 communicating with the first installation space 1; the first pressure plate 7 is provided with a first leg 701, the first leg 701 being located between the back side of the first pressure plate 7 away from the first molecular sieve 101 and the inner wall of the housing; the first compression spring 8 is located between the first pressure plate 7 away from the second gas nozzle 4 and the inner wall of the housing. The first molecular sieve 101 is disposed between the two first pressure plates 7 arranged in a pair, and is compacted by the first compression spring 8. The provision of the first leg 701 provides a gap between the first pressure plate 7 and the inner wall of the housing, ensuring that both compressed air and backflush gas can pass smoothly through the first through hole 702 on the first pressure plate 7. The first supporting legs 701 may be a cylindrical structure arranged along the circumference of the first pressing plate 7 , or the first supporting legs 701 may be a plurality of block structures evenly distributed on the first pressing plate 7 .

[0046] As a further preferred embodiment, a first breathable gasket 9 is further included, which is disposed between the first pressing plate 7 and the first molecular sieve 101. The first breathable gasket 9 is preferably made of fiber cotton, which has the functions of sound absorption and dust filtering, and can further compact the first molecular sieve 101.

[0047] Preferably, the housing further includes a second pressure plate 10 and a second compression spring 11 located in the second installation space 2; two second pressure plates 10 are provided, one of which is arranged adjacent to the third gas nozzle 5, and the other is away from the third gas nozzle 5; the second molecular sieve 201 is located between the two second pressure plates 10; the second pressure plate 10 is provided with a second through hole 1002 connected to the second installation space 2; the second pressure plate 10 is provided with a second leg 1001, and the second leg 1001 is located between the back side of the second pressure plate 10 away from the second molecular sieve 201 and the inner wall of the housing; the second compression spring 11 is located between the second pressure plate 10 away from the third gas nozzle 5 and the inner wall of the housing. The second molecular sieve 201 is provided between the two second pressure plates 10 arranged in a pair, and is compacted by the second compression spring 11. By providing the second support legs 1001, a gap is created between the second pressure plate 10 and the inner wall of the housing, ensuring that both compressed air and backflush gas can smoothly pass through the second through holes 1002 on the second pressure plate 10. The second support legs 1001 may be a cylindrical structure arranged along the circumference of the second pressure plate 10, or the second support legs 1001 may be a plurality of block-shaped structures evenly distributed on the second pressure plate 10.

[0048] Preferably, a second breathable gasket 12 is further included, which is disposed between the second pressing plate 10 and the second molecular sieve 201. The second breathable gasket 12 is preferably made of fiber cotton, which has the functions of sound attenuation and dust filtering, and can further compact the second molecular sieve 201.

[0049] The shell can be an integral structure formed in one piece. Preferably, the shell includes a first tank body 13, a second tank body 14, an air pipe 16 and a cover body 17 arranged in parallel in pairs; the first tank body 13 and the second tank body 14 are both barrel structures with one end open; the second gas nozzle 4 is arranged at the bottom of the first tank body 13, and the third gas nozzle 5 is arranged at the bottom of the second tank body 14; the open end of the first tank body 13 and the open end of the second tank body 14 are connected by a connecting plate 15, and a groove 1501 for connecting the inner cavity of the first tank body 13 and the inner cavity of the second tank body 14 is provided on the connecting plate 15; the air pipe 16 is located between the first tank body 13 and the second tank body 14; one end of the air pipe 16 is connected to the connecting plate 15, and the other end of the air pipe 16 is connected to the connecting plate 15. Serving as the third gas nozzle 5; the gas pipe 16 is connected to the inner cavity of the groove 1501; the first tank body 13, the second tank body 14 and the connecting plate 15 are all detachably connected to the cover body 17; the cover body 17 closes or opens the opening of the groove 1501, the opening of the first tank body 13 and the opening of the second tank body 14; when the cover body 17 closes the opening of the groove 1501, the opening of the first tank body 13 and the opening of the second tank body 14, the gas delivery channel formed by the inner wall of the cover body 17 and the inner wall of the groove 1501, and the gas pipe 16 together serve as the airway; the inner wall of the cover body 17 and the inner cavity of the first tank body 13 form the first installation space 1, and the inner wall of the cover body 17 and the inner cavity of the second tank body 14 form the second installation space 2.

[0050] The housing is designed as a split structure, making it easy to open the cover 17 to replace the first and second molecular sieves 101, 102. The opening edge of the first tank 13, the opening edge of the groove 1501, and the opening edge of the second tank 14 are all removably connected to the cover 17 via bolts. The open ends of the first tank 13 and the second tank 14 are both welded to the connecting plate 15. One end of the gas pipe 16 is also welded to the connecting plate 15.

[0051] Preferably, it also includes a second sealing ring 20 arranged between the opening of the groove 1501, the opening of the first tank body 13, the opening of the second tank body 14 and the cover body 17, and the gap between the opening of the groove 1501, the opening of the first tank body 13, the opening of the second tank body 14 and the cover body 17 is sealed by the second sealing ring 20.

[0052] To improve the structural stability of the first tank body 13, the gas pipe 16, and the second tank body 14, the outer wall of the gas pipe 16 is preferably connected to the outer wall of the second tank body 14, and the first tank body 13 and the gas pipe 16 are connected via a reinforcing plate 18. The outer wall of the gas pipe 16 is welded to the outer wall of the second tank body 14. One end of the reinforcing plate 18 is welded to the outer wall of the first tank body 13, and the other end is welded to the outer wall of the gas pipe 16. Multiple reinforcing plates 18 can be provided, and the multiple reinforcing plates 18 are spaced apart along the axial direction of the gas pipe 16.

[0053] The embodiments of this specific implementation are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drying mechanism for an air compression pump, characterized in that: The invention comprises a shell, wherein a first installation space (1) and a second installation space (2) are provided in the shell; a first molecular sieve (101) is provided in the first installation space (1), and a second molecular sieve (201) is provided in the second installation space (2); An air passage for connecting the first installation space (1) and the second installation space (2) is provided in the shell; a first air nozzle (3) connected to the air passage is provided on the shell, and a throttle valve (6) is installed at the first air nozzle (3); a second air nozzle (4) connected to the first installation space (1) and a third air nozzle (5) connected to the second installation space (2) are provided on the shell; the second air nozzle (4) and the third air nozzle (5) are both used to connect to the compressed air outlet of the air compressor pump; the first air nozzle (3), the second air nozzle (4) and the third air nozzle (5) are all located at the same end of the shell; When dehumidifying the compressed air, the second air nozzle (4) and the third air nozzle (5) serve as air inlet nozzles, and the first air nozzle (3) serves as air outlet nozzles; when back-blowing the first molecular sieve (101) and the second molecular sieve (201) to remove moisture, the second air nozzle (4) and the third air nozzle (5) serve as air outlet nozzles, and the first air nozzle (3) serves as an air inlet nozzle.

2. The drying mechanism of an air compression pump according to claim 1, characterized in that: The throttle valve (6) comprises a mounting tube (601) with openings at both ends and connected to the air passage, wherein a first limiting plate (602), a second limiting plate (603) and a sphere (604) are arranged in the mounting tube (601); one end of the mounting tube (601) is mounted in the first air nozzle (3), and the other end is located outside the first air nozzle (3); The first limiting plate (602) and the second limiting plate (603) are arranged in pairs along the axial direction of the mounting tube (601), and the three are coaxially arranged; the first limiting plate (602) is located near the mounting tube (601) at one end inside the first gas nozzle (3), and the second limiting plate (603) is located near the mounting tube (601) at the other end outside the first gas nozzle (3); The first limiting plate (602) is provided with a throttle hole (6021) and a first air hole (6022), wherein the first air hole (6022) is located in the middle of the first limiting plate (602), and the throttle hole (6021) is located on one side of the first air hole (6022); the second limiting plate (603) is provided with a second air hole (6031) deviated from its own center; The sphere (604) is installed between the first limiting plate (602) and the second limiting plate (603), and the diameter of the sphere (604) is smaller than the distance between the first limiting plate (602) and the second limiting plate (603), and smaller than the inner diameter of the mounting tube (601); the sphere (604) is used to block or open the first air hole (6022) on the first limiting plate (602).

3. The drying mechanism of an air compression pump according to claim 2, characterized in that: A boss (6032) is provided in the middle of the second limiting plate (603), and the boss (6032) is located on a side of the second limiting plate (603) adjacent to the first limiting plate (602); the second air hole (6031) is located outside the boss (6032).

4. The drying mechanism of an air compression pump according to claim 3, characterized in that: A plurality of the second air holes (6031) are provided, and the plurality of the second air holes (6031) are evenly distributed along the circumference of the boss (6032).

5. The drying mechanism of an air compression pump according to claim 1, characterized in that: It also includes a first pressing plate (7) and a first pressing spring (8) arranged in the first installation space (1); Two first pressure plates (7) are provided, one of which is arranged adjacent to the second gas nozzle (4), and the other is away from the second gas nozzle (4); the first molecular sieve (101) is located between the two first pressure plates (7); the first pressure plate (7) is provided with a first through hole (702) connected to the first installation space (1); the first pressure plate (7) is provided with a first leg (701), and the first leg (701) is located between the back side of the first pressure plate (7) away from the first molecular sieve (101) and the inner wall of the shell; the first compression spring (8) is located between the first pressure plate (7) away from the second gas nozzle (4) and the inner wall of the shell.

6. The drying mechanism of an air compression pump according to claim 5, characterized in that: It also includes a first air-permeable gasket (9), which is arranged between the first pressing plate (7) and the first molecular sieve (101).

7. The drying mechanism of an air compression pump according to claim 1, characterized in that: It also includes a second pressing plate (10) and a second pressing spring (11) located in the second installation space (2); There are two second pressure plates (10), one of which is arranged adjacent to the third gas nozzle (5), and the other is away from the third gas nozzle (5); the second molecular sieve (201) is located between the two second pressure plates (10); the second pressure plate (10) is provided with a second through hole (1002) connected to the second installation space (2); the second pressure plate (10) is provided with a second leg (1001), and the second leg (1001) is located between the back side of the second pressure plate (10) away from the second molecular sieve (201) and the inner wall of the shell; the second compression spring (11) is located between the second pressure plate (10) away from the third gas nozzle (5) and the inner wall of the shell.

8. The drying mechanism of an air compression pump according to claim 7, characterized in that: It also includes a second air-permeable gasket (12), which is arranged between the second pressing plate (10) and the second molecular sieve (201).

9. The drying mechanism of an air compression pump according to claim 1, characterized in that: The housing comprises a first tank body (13), a second tank body (14), an air delivery pipe (16) and a cover body (17) arranged in parallel in pairs; the first tank body (13) and the second tank body (14) are both barrel structures with one end open; the second gas nozzle (4) is arranged at the bottom of the first tank body (13), and the third gas nozzle (5) is arranged at the bottom of the second tank body (14); The open end of the first tank body (13) and the open end of the second tank body (14) are connected via a connecting plate (15), and a groove (1501) is provided on the connecting plate (15) for connecting the inner cavity of the first tank body (13) and the inner cavity of the second tank body (14); The air delivery pipe (16) is located between the first tank body (13) and the second tank body (14); one end of the air delivery pipe (16) is connected to the connecting plate (15), and the other end of the air delivery pipe (16) serves as the third air nozzle (5); the air delivery pipe (16) is in communication with the inner cavity of the groove (1501); The first tank body (13), the second tank body (14) and the connecting plate (15) are all detachably connected to the cover body (17); the cover body (17) closes or opens the opening of the groove (1501), the opening of the first tank body (13) and the opening of the second tank body (14); When the cover (17) closes the opening of the groove (1501), the opening of the first tank body (13) and the opening of the second tank body (14), the gas delivery channel formed by the inner wall of the cover (17) and the inner wall of the groove (1501), and the gas delivery pipe (16) together serve as the airway; the inner wall of the cover (17) and the inner cavity of the first tank body (13) form the first installation space (1), and the inner wall of the cover (17) and the inner cavity of the second tank body (14) form the second installation space (2).

10. The drying mechanism of an air compression pump according to claim 9, characterized in that: The outer wall of the gas delivery pipe (16) is connected to the outer wall of the second tank body (14), and the first tank body (13) is connected to the gas delivery pipe (16) via a reinforcing plate (18).

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