Drying mechanism of air compression pump

Abstract

The invention belongs to the technical field of automobile air suspension systems, and particularly relates to a drying mechanism of an air compression pump with a good 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 invention belongs to the technical field of automobile air suspension systems, and in particular relates to a drying mechanism of an air compression pump. Background Art

[0002] With the development of automobile technology, the use of air suspension systems is becoming more and more widespread. The core driving component of air suspension is the air compressor pump. The gas source of the air compressor pump is the atmosphere. If the moisture in the atmosphere enters the system, it will seriously affect the service life of the system. The existing air suspension system is equipped with a drying mechanism connected to the air compressor pump. The drying mechanism has drying and regeneration capabilities, which is used to eliminate the moisture in the atmosphere entering the air compressor pump.

[0003] The Chinese patent document with the 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 then 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 flow 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 discharge the moisture absorbed by the molecular sieve by blowing on the molecular sieve. The regulating valve and throttle hole can effectively increase the back-blowing 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 the actual use process, there is a technical problem of poor dehumidification effect. Summary of the invention

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

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

[0006] An air passage for connecting the first installation space and the second installation space is arranged in the shell; a first air nozzle connected to the air passage is arranged 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 arranged 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 back-blowing 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 comprises a mounting tube with openings at both ends and connected to the airway, 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 are coaxially arranged; the first limiting plate is close to one end of the mounting tube located in the first gas nozzle, and the second limiting plate is close to the other end of the mounting tube located outside the first gas nozzle;

[0010] The first limiting plate is provided with a throttling hole and a first air hole, the first air hole is located in the middle of the first limiting plate, and the throttling 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 limit plate and the second limit plate, and the diameter of the sphere is smaller than the distance between the first limit plate and the second limit 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 limit 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 disposed in the first installation space;

[0015] Two first pressure plates are provided, one of which is arranged adjacent to the second gas nozzle, and the other is far away from the second gas nozzle; the first molecular sieve is located between the two first pressure plates; a first through hole connected to the first installation space is provided on the first pressure plate; a first leg is provided on the first pressure plate, and the first 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 clamping 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 air-permeable 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] Two second pressure plates are provided, one of which is arranged adjacent to the third gas nozzle, and the other is far 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 leg is provided on the second pressure plate, and the second 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 air-permeable gasket, which is arranged between the second pressing plate and the second molecular sieve.

[0020] Furthermore, the shell 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 arranged at the bottom of the first tank body, and the third gas nozzle is arranged 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 through 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 delivery pipe is located between the first tank body and the second tank body; one end of the gas delivery pipe is connected to the connecting plate, and the other end of the gas delivery pipe serves as the third gas nozzle; the gas delivery 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, in accordance with the space of the air compression pump, the space is reasonably utilized to complete the structural design without significantly affecting the overall size, and the space occupancy is smaller. Third, when the drying performance of the first molecular sieve and the second molecular sieve after backblowing is still poor, the first molecular sieve and the second molecular sieve can be replaced by opening the cover body, which is convenient for disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0028] Figure 2 Schematic diagram of gas flow direction of the present invention when back-blowing the first molecular sieve and the second molecular sieve to remove moisture;

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

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

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

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

[0033] Figure 7 It 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 direction of the throttle valve when the first molecular sieve and the second molecular sieve are back-blown to remove moisture;

[0035] Figure 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 is further described below with reference to the accompanying drawings and embodiments.

[0037] The drying mechanism of the air compression pump comprises a shell, wherein a first installation space 1 and a second installation space 2 are arranged in the shell; a first molecular sieve 101 is arranged in the first installation space 1, and a second molecular sieve 201 is arranged in the second installation space 2; an air passage for connecting the first installation space 1 and the second installation space 2 is arranged 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, 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 6 connected to the second installation space 2 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 are used as inlet nozzles, and the first air nozzle 3 is used as the outlet nozzle; when the first molecular sieve 101 and the second molecular sieve 201 are back-blown for dehumidification, the second air nozzle 4 and the third air nozzle 5 are used as outlet nozzles, and the first air nozzle 3 is used as the inlet nozzle.

[0038] The housing 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 pump is passed into the housing 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 another stream of compressed air enters the second installation space 2 and is dehumidified by the second molecular sieve 201, and the dehumidified dry compressed air enters the airway and is discharged through the first air nozzle 3, and 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 airway 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 air nozzle 4 and the center of the third air nozzle 5 is taken as a reference line L, and the center of the first air 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 airway, 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 installed 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 deviated from its own center; the sphere 604 is installed between the first limiting plate 602 and the second limiting plate 603, 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 limit plate 602, the second limit plate 603 and the sphere 604. The outer edge of the first limit plate 602 and the outer edge of the second limit 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 limit plate 602 and the second limit 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 limit plate 603 itself. When the sphere 604 abuts against the second limit 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 installation cylinder 601 through the air passage, enters the space between the first limit plate 602 and the second limit plate 603 through the throttle hole 6021 and the first air hole 6022, the sphere 604 abuts against the second limit plate 603 under the driving action of the dry compressed air, and the dry compressed air is discharged through the second air hole 6031. When the first molecular sieve 101 and the second molecular sieve 201 are back-blown for dehumidification, the back-blowing gas enters the installation cylinder 601 in the opposite direction, enters the space between the first limit plate 602 and the second limit plate 603 through the second air hole 6031, the sphere 604 blocks the first air hole 6022 under the driving action of the back-blowing gas, and the back-blowing gas enters the air passage through the throttle hole 6021. The throttle valve 6 can control the speed of gas discharge.

[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 , and 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 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. When the ball 604 abuts against the second limiting plate 603, the ball 604 abuts against the boss 6032, thereby improving the discharge effect 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, it also includes a first pressing plate 7 and a first pressing spring 8 arranged in the first installation space 1; two first pressing plates 7 are provided, one of which is arranged adjacent to the second gas nozzle 4, and the other first pressing plate 7 is far away from the second gas nozzle 4; the first molecular sieve 101 is located between the two first pressing plates 7; the first pressing plate 7 is provided with a first through hole 702 connected to the first installation space 1; the first pressing plate 7 is provided with a first leg 701, and the first leg 701 is located between the back side of the first pressing plate 7 away from the first molecular sieve 101 and the inner wall of the shell; the first pressing spring 8 is located between the first pressing plate 7 away from the second gas nozzle 4 and the inner wall of the shell. The first molecular sieve 101 is arranged between the two first pressing plates 7 arranged in pairs, and the first molecular sieve 101 is compacted by the first pressing spring 8. By providing the first leg 701, there is a distance between the first pressing plate 7 and the inner wall of the shell, ensuring that the compressed air and the back-blowing gas can pass smoothly through the first through hole 702 on the first pressing plate 7. The first supporting leg 701 may be a cylindrical structure arranged along the circumference of the first pressing plate 7 , or the first supporting leg 701 may be a plurality of block structures evenly distributed on the first pressing plate 7 .

[0046] As a further preferred embodiment, a first air-permeable gasket 9 is further included, and the first air-permeable gasket 9 is disposed between the first pressing plate 7 and the first molecular sieve 101. The first air-permeable gasket 9 is preferably a fiber cotton product, which has the functions of noise reduction and dust filtering, and can further compact the first molecular sieve 101.

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

[0048] Preferably, a second air-permeable gasket 12 is further included, and the second air-permeable gasket 12 is disposed between the second pressing plate 10 and the second molecular sieve 201. The second air-permeable gasket 12 is preferably a fiber cotton product, which has the functions of noise reduction 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 with 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 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 configured as a split structure, so that the cover 17 can be opened to replace the first molecular sieve 101 and the second molecular sieve 102. The opening edge of the first tank body 13, the opening edge of the groove 1501, and the opening edge of the second tank body 14 are all detachably connected to the cover body 17 by bolts. The opening end of the first tank body 13 and the opening end of the second tank body 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 second sealing ring 20 is used to seal 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.

[0052] In order to improve the structural stability of the first tank body 13, the gas pipe 16 and the second tank body 14, preferably, the outer wall of the gas 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 pipe 16 through 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. The number of reinforcing plates 18 can be multiple, and the multiple reinforcing plates 18 are arranged in pairs 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 protection scope of the present invention. Any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A drying mechanism for an air compression pump, characterized in that: It comprises a shell, wherein a first installation space (1) and a second installation space (2) are arranged in the shell; a first molecular sieve (101) is arranged in the first installation space (1), and a second molecular sieve (201) is arranged in the second installation space (2); An air passage for connecting the first installation space (1) and the second installation space (2) is arranged in the shell; a first air nozzle (3) connected to the air passage is arranged 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 arranged 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 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. A drying mechanism for an air compression pump as claimed in 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 limit plate (602), a second limit 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 at one end of the first gas nozzle (3) close to the mounting tube (601), and the second limiting plate (603) is located at the other end of the mounting tube (601) outside the first gas nozzle (3); The first limiting plate (602) is provided with a throttling 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 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) deviated from its own center; The sphere (604) is installed between the first limiting plate (602) and the second limiting plate (603); 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. A drying mechanism for an air compression pump as claimed in 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 on the outer side of the boss (6032).

4. A drying mechanism for an air compression pump as claimed in 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 pressing plates (7) are provided, one of which is arranged adjacent to the second gas nozzle (4), and the other of which is far away from the second gas nozzle (4); the first molecular sieve (101) is located between the two first pressing plates (7); the first pressing plate (7) is provided with a first through hole (702) connected to the first installation space (1); the first pressing plate (7) is provided with a first leg (701), and the first leg (701) is located between the back side of the first pressing plate (7) away from the first molecular sieve (101) and the inner wall of the shell; the first clamping spring (8) is located between the first pressing plate (7) away from the second gas nozzle (4) and the inner wall of the shell.

6. A drying mechanism for an air compression pump as claimed in 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. A drying mechanism for an air compression pump as claimed in 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); Two second pressing plates (10) are provided, one of which is arranged adjacent to the third gas nozzle (5), and the other second pressing plate (10) is far away from the third gas nozzle (5); the second molecular sieve (201) is located between the two second pressing plates (10); the second pressing plate (10) is provided with a second through hole (1002) connected to the second installation space (2); the second pressing plate (10) is provided with a second leg (1001), and the second leg (1001) is located between the back side of the second pressing plate (10) away from the second molecular sieve (201) and the inner wall of the shell; the second clamping spring (11) is located between the second pressing plate (10) away from the third gas nozzle (5) and the inner wall of the shell.

8. A drying mechanism for an air compression pump as claimed in 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 shell comprises 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 via a connecting plate (15), and the connecting plate (15) is provided with a groove (1501) for connecting the inner cavity of the first tank body (13) with 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 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 delivery pipe (16) together serve as the gas channel; 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).

10. A drying mechanism for an air compression pump as claimed in 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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