VPSA (Vacuum Pressure Swing Adsorption) oil-free compressor for vehicle oxygen production
By designing a sealed connection between a fully sealed protective mechanical body and a protective motor, combined with the cross-type connection of the positive and negative pressure compression components and the external settings of the high heat generation channel, the problems of clean air source pollution, high energy consumption, and complex structure of traditional compressors in the vehicle oxygen production system are solved, and a compact, oil-free seal, strong shock resistance and efficient heat dissipation VPSA oil-free compressor for vehicle oxygen production is realized.
Patent Information
- Application Number
- CN202520985842.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-20
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2035-05-20
AI Technical Summary
In the existing vehicle oxygen production system, traditional compressors have problems such as clean air source pollution, high energy consumption, complex structure, large volume, poor earthquake resistance and low heat dissipation efficiency, which is difficult to meet the requirements of on-board space and vibration environment.
A VPSA oil-free compressor for vehicle oxygen production is designed, and the sealed connection between a fully sealed protective mechanical body and a protective motor is adopted. The positive and negative pressure compression components are driven by a cross-type vertical connection. The high heat generation channel is set on the outer surface to reduce heat dissipation dependence, and the shock-proof and anti-detachment limit frame and spaced limit stop ring are used to improve shock resistance.
The compressor is achieved with a compact structure, oil-free sealing, strong shock-proof and good heat dissipation effect of vehicle oxygen production, which is suitable for on-board space requirements, reduces energy consumption, and ensures oxygen cleanliness and long-term reliable operation.
Smart Images
Figure CN223035194U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of compressors, and particularly relates to a VPSA oil-free compressor for vehicle oxygen generation. Background Art
[0002] At present, the traditional compressors commonly used in vehicle oxygen generation systems have the following deficiencies: First, some use the vehicle's own air-conditioning compressor. Such compressors all contain cooling oil or refrigerant-like liquid chemical substances, which cannot be used for the clean gas source required for oxygen generation, and have high energy consumption. In new energy vehicles, it is the part that consumes the most battery power, and it is easy to cause cooling oil or refrigerant-like liquid chemical substances to mix into the oxygen flow, affecting the cleanliness of the produced oxygen; Second, for the requirements of the vacuum pressure swing adsorption (VPSA) process, traditional compressors mostly use independent positive pressure and negative pressure units, which have complex structures and large volumes, and it is difficult to meet the in-vehicle space limitations; Third, the vibration during vehicle driving easily causes the compressor bearings to become dislocated and the seals to fail, reducing the operating reliability and limiting the service life of the compressor in the in-vehicle vibration environment; Fourth, the conventional ventilation channel has an internal structure design, with low heat dissipation efficiency, and relies on external forced heat dissipation devices, increasing energy consumption. Therefore, there is an urgent need for a VPSA oil-free compressor for vehicle oxygen generation that is structurally compact, oil-free sealed, has strong shock resistance, and good heat dissipation effect. Summary of the Utility Model
[0003] The utility model aims at the above problems, makes up for the deficiencies of the prior art, and provides a VPSA oil-free compressor for vehicle oxygen generation.
[0004] To achieve the above object, the utility model adopts the following technical solutions.
[0005] The utility model provides a VPSA oil-free compressor for vehicle oxygen production, comprising a fully sealed protective mechanical body and a protective motor, wherein the fully sealed protective mechanical body and the protective motor are sealed and connected; the fully sealed protective mechanical body comprises a positive pressure airway protective structure, a negative pressure airway protective structure, a positive pressure compression assembly, and a negative pressure compression assembly, wherein the positive pressure airway protective structure and the negative pressure airway protective structure are connected by a protective seal to form a positive and negative pressure airway protective structure combination, wherein the power output shaft of the protective motor passes through the negative pressure airway protective structure and is arranged at the center of the positive and negative pressure airway protective structure combination, and the positive and negative pressure airway protective structure combination There are two pairs of symmetrical connection ports around, one pair of symmetrical connection ports is sealed and connected to the positive pressure compression assembly, and the other pair of symmetrical connection ports is sealed and connected to the negative pressure compression assembly; the positive pressure compression assembly is sealed and connected to the positive pressure ventilation channel on the positive pressure airway protection structure, and the positive pressure ventilation channel is arranged on the outer surface of the positive pressure airway protection structure; the negative pressure compression assembly is sealed and connected to the negative pressure ventilation channel on the negative pressure airway protection structure, and the negative pressure ventilation channel is arranged on the outer surface of the negative pressure airway protection structure; the two positive pressure compression assemblies and the two negative pressure compression assemblies are vertically connected to the power output shaft of the protection motor in a cross shape.
[0006] Furthermore, an eccentric shaft for connecting to a positive-pressure compression assembly and a negative-pressure compression assembly is sleeved and fixed on the power output shaft of the protection motor, and stabilizers are provided at both upper and lower ends of the eccentric shaft, and the stabilizer is sleeved and fixed on the power output shaft of the protection motor; the centralizer at the upper end of the eccentric shaft is connected to the positive-pressure airway protection structure through a bearing, and the centralizer at the lower end of the eccentric shaft is connected to the negative-pressure airway protection structure through a bearing.
[0007] Furthermore, the positive-pressure airway protection structure is provided with a bearing mounting groove and a shockproof and anti-detachment limit frame for fixing and installing the bearing, and the negative-pressure airway protection structure is provided with a bearing fixing socket and a shockproof and anti-detachment limit frame for installing the bearing, and the bearings are respectively fixed in the bearing mounting groove and the bearing fixing socket by the shockproof and anti-detachment limit frame.
[0008] Furthermore, both the positive-pressure compression assembly and the negative-pressure compression assembly include a cylinder, a valve plate, a valve cover, and a piston connecting rod. One ends of the cylinders of the two positive-pressure compression assemblies and one ends of the cylinders of the two negative-pressure compression assemblies are respectively and hermetically connected to the respective connection ports of the positive-negative airway protection structure combination. The cylinders of the two positive-pressure compression assemblies are hermetically communicated with the positive-pressure ventilation channel, and the cylinders of the two negative-pressure compression assemblies are hermetically communicated with the negative-pressure ventilation channel. The other ends of the cylinders of the two positive-pressure compression assemblies and the other ends of the cylinders of the two negative-pressure compression assemblies are hermetically connected to the valve plate, and the valve plate is hermetically connected to the valve cover. The opposite ends of the piston connecting rods of the two positive-pressure compression assemblies are vertically and staggeredly connected to the upper half of the eccentric shaft, and the other ends of the piston connecting rods of the two positive-pressure compression assemblies can be reciprocally connected to their respective corresponding cylinders. The opposite ends of the piston connecting rods of the two negative-pressure compression assemblies are vertically and staggeredly connected to the lower half of the eccentric shaft, and the other ends of the piston connecting rods of the two negative-pressure compression assemblies can be reciprocally connected to their respective corresponding cylinders.
[0009] Furthermore, spacer limit retaining rings are provided at the staggered butt joints of the opposite ends of the piston connecting rods of the two positive-pressure compression assemblies and the two negative-pressure compression assemblies, and the spacer limit retaining rings are sleeved on the eccentric shaft.
[0010] Furthermore, dynamic seal leather cups are provided on the piston connecting rods, and the dynamic seal leather cups are fixed to the piston connecting rods through leather cup pressing plates. The mouths of the dynamic seal leather cups on the piston connecting rods of the two positive-pressure compression assemblies face away from the piston connecting rods, and the mouths of the dynamic seal leather cups on the piston connecting rods of the two negative-pressure compression assemblies face the piston connecting rods.
[0011] Furthermore, single-hole check valve discs and double-hole check valve discs are provided on the valve plate. The single-hole check valve discs are fixedly connected to the side of the valve plate facing the piston connecting rod through single-hole check valve disc pressing plates, and the double-hole check valve discs are fixedly connected to the side of the valve plate facing the valve cover through double-hole check valve disc pressing plates.
[0012] Furthermore, air path quick connectors are communicated with both the positive-pressure ventilation channel and the negative-pressure ventilation channel.
[0013] Furthermore, body waterproof seals are provided on both the upper and lower parts of the body of the protection motor, and heat dissipation fins are provided in the middle area of the body.
[0014] Advantages of the present utility model:
[0015] Compared with the prior art, a VPSA oil-free compressor for vehicle oxygen generation provided by the present utility model has the following advantages:
[0016] (1) Through the cross-symmetric layout of the positive-pressure and negative-pressure compression components and the shared power output shaft, the synchronous operation of positive-pressure compression and vacuum desorption driven by a single motor is achieved, significantly reducing the overall volume and adapting to the space requirements of the vehicle; by arranging the high-heat positive-pressure ventilation channel on the outer surface of the positive-pressure airway protection structure and the high-heat negative-pressure ventilation channel on the outer surface of the negative-pressure airway protection structure, the dependence on external forced heat dissipation can be reduced and the energy consumption can be lowered.
[0017] (2) The multiple sealed connections between the positive and negative pressure airway protection structure combination and the protection motor, combined with the waterproof seal design of the machine body, achieve a fully sealed effect of dust and water protection, ensuring long-term reliable operation in complex vehicle environments; moreover, there is no oil dynamic seal design during operation, ensuring the cleanliness and purity of the produced oxygen; in addition, through the combined application of the shock-proof and anti-displacement limit frame and the spacer limit retaining ring, the dislocation of the bearing and the offset of the piston connecting rod caused by vehicle bumps are effectively avoided, ensuring the structural stability of the compressor in a vibrating environment. Brief Description of the Drawings
[0018] Figure 1 is a three-dimensional structural schematic diagram of a VPSA oil-free compressor for vehicle oxygen production according to the present utility model.
[0019] Figure 2 is an exploded structural schematic diagram of a VPSA oil-free compressor for vehicle oxygen production according to the present utility model.
[0020] Figure 3 is a structural schematic diagram of the positive and negative pressure airway protection structure combination of a VPSA oil-free compressor for vehicle oxygen production according to the present utility model.
[0021] Figure 4 is a structural schematic diagram of the positive pressure airway protection structure of a VPSA oil-free compressor for vehicle oxygen production according to the present utility model.
[0022] Figure 5 is a structural schematic diagram of the negative pressure airway protection structure of a VPSA oil-free compressor for vehicle oxygen production according to the present utility model.
[0023] Figure 6 is Figure 5 an enlarged structural schematic diagram of part A in
[0024] Figure 7 is a structural schematic diagram of the protection motor of a VPSA oil-free compressor for vehicle oxygen production according to the present utility model.
[0025] Figure 8 is a structural schematic diagram of the connection between four piston connecting rods and the eccentric shaft of a VPSA oil-free compressor for vehicle oxygen production according to the present utility model.
[0026] Markings in the figure: 1 is the positive pressure airway protection structure, 2 is the positive pressure compression component, 3 is the negative pressure compression component, 4 is the negative pressure airway protection structure, 5 is the protection motor, 6 is the bearing, 7 is the anti-vibration and anti-detachment limit frame, 8 is the centralizer, 9 is the eccentric shaft, 10 is the air path quick interface, 11 is the interval limit baffle ring, 12 is the cylinder, 13 is the single-hole one-way valve plate pressure plate, 14 is the single-hole one-way valve plate, 15 is the valve plate, 16 is the double-hole one-way valve plate, 17 is the double-hole one-way valve plate pressure plate, 18 is the valve cover, 19 is the leather cup pressure plate, 20 is the dynamic sealing leather cup, 21 is the piston connecting rod, 22 is the bearing mounting groove, 23 is the positive pressure ventilation channel, 24 is the protective seal, 25 is the bearing fixing seat, 26 is the negative pressure ventilation channel, and 27 is the body waterproof seal. DETAILED DESCRIPTION
[0027] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.
[0028] Combination Figures 1 to 8As shown in the figure, a VPSA oil-free compressor for vehicle oxygen production provided by an embodiment of the present utility model includes a fully sealed protective mechanical body and a protective motor 5, and the fully sealed protective mechanical body is hermetically connected to the protective motor 5; the fully sealed protective mechanical body includes a positive pressure airway protective structure body 1, a negative pressure airway protective structure body 4, a positive pressure compression assembly 2, and a negative pressure compression assembly 3. A positive and negative pressure airway protective structure combination body is formed by connecting the positive pressure airway protective structure body 1 and the negative pressure airway protective structure body 4 through a protective seal 24. There are two pairs of symmetrical connection ports around the positive and negative pressure airway protective structure combination body. The positive pressure compression assembly 2 is hermetically connected to one pair of symmetrical connection ports, and the negative pressure compression assembly 3 is hermetically connected to the other pair of symmetrical connection ports; the positive pressure compression assembly 2 is hermetically communicated with a positive pressure air exchange channel 23 on the positive pressure airway protective structure body 1, and the positive pressure air exchange channel 23 is arranged on the outer surface of the positive pressure airway protective structure body 1. The negative pressure compression assembly 3 is hermetically communicated with a negative pressure air exchange channel 26 on the negative pressure airway protective structure body 4, and the negative pressure air exchange channel 26 is arranged on the outer surface of the negative pressure airway protective structure body 4; the two positive pressure compression assemblies 2 and the two negative pressure compression assemblies 3 are vertically connected in a cross shape to the power output shaft of the protective motor 5. A body waterproof seal 27 is provided on both the upper and lower parts of the body of the protective motor 5, and heat dissipation fins are arranged in the middle area of the body; an eccentric shaft 9 for connecting with the positive pressure compression assembly 2 and the negative pressure compression assembly 3 is sleeved and fixed on the power output shaft of the protective motor 5. Centering devices 8 are arranged at both the upper and lower ends of the eccentric shaft 9, and the centering devices 8 are sleeved and fixed on the power output shaft of the protective motor 5; the centering device 8 at the upper end of the eccentric shaft 9 is connected to the positive pressure airway protective structure body 1 through a bearing 6, and the centering device 8 at the lower end of the eccentric shaft 9 is connected to the negative pressure airway protective structure body 4 through a bearing 6.
[0029] A bearing installation groove 22 and an anti-vibration and anti-disengagement limit frame 7 for fixedly installing the bearing 6 are arranged on the positive pressure airway protective structure body 1, and a bearing fixing seat 25 and an anti-vibration and anti-disengagement limit frame 7 for installing the bearing 6 are arranged on the negative pressure airway protective structure body 4. The bearing 6 is respectively limited and fixed in the bearing installation groove 22 and the bearing fixing seat 25 through the anti-vibration and anti-disengagement limit frame 7. Since the VPSA oil-free compressor of the present utility model is for vehicle oxygen production, the vehicle will often encounter bumps and vibrations during driving, which is very likely to cause the bearing 6 to become dislocated, thereby damaging the VPSA oil-free compressor; therefore, the present utility model is provided with the anti-vibration and anti-disengagement limit frame 7, which can play a role in anti-vibration and anti-disengagement for the bearing 6 connected to the centering device 8, and ensures the service life of the VPSA oil-free compressor for vehicle oxygen production.
[0030] Since the compressor generates heat during operation, the high-heat generation position is at the air exchange channel of the compressor; therefore, in the present utility model, the positive-pressure air exchange channel 23 with high heat generation is arranged on the outer surface of the positive-pressure air duct protection structure 1, which can effectively improve the heat dissipation effect in the vehicle environment under air convection, reduce the heat of the compressed gas, thereby improving the efficiency and flow rate of the positive-pressure air exchange part of the compressor, reducing the requirement for external forced heat dissipation, and reducing energy consumption; at the same time, the negative-pressure air exchange channel 26 with high heat generation is arranged on the outer surface of the negative-pressure air duct protection structure 4, which can effectively improve the heat dissipation effect in the vehicle environment under air convection, reduce the heat of the vacuum-extracted gas, thereby improving the efficiency and flow rate of the negative-pressure air exchange part of the compressor, reducing the requirement for external forced heat dissipation, and reducing energy consumption.
[0031] The positive-pressure air duct protection structure 1, the negative-pressure air duct protection structure 4, the positive-pressure compression assembly 2, and the negative-pressure compression assembly 3 are hermetically connected to form a fully sealed protection mechanical body, and the fully sealed protection mechanical body is hermetically connected to the protection motor 5, which ensures that the VPSA oil-free compressor for vehicle oxygen generation of the present utility model has the ability to prevent water and dust and is suitable for complex vehicle working conditions.
[0032] Specifically, the positive-pressure compression assembly 2 and the negative-pressure compression assembly 3 both include a cylinder 12, a valve plate 15, a valve cover 18, and a piston connecting rod 21; one end of the cylinders 12 of the two positive-pressure compression assemblies 2 and one end of the cylinders 12 of the two negative-pressure compression assemblies 3 are respectively hermetically connected to the respective connection ports of the positive-negative pressure air duct protection structure combination body, the cylinders 12 of the two positive-pressure compression assemblies 2 are hermetically communicated with the positive-pressure air exchange channel 23, and the cylinders 12 of the two negative-pressure compression assemblies 3 are hermetically communicated with the negative-pressure air exchange channel 26; the other ends of the cylinders 12 of the two positive-pressure compression assemblies 2 and the other ends of the cylinders 12 of the two negative-pressure compression assemblies 3 are hermetically connected to the valve plate 15, and the valve plate 15 is hermetically connected to the valve cover 18; the opposite ends of the piston connecting rods 21 of the two positive-pressure compression assemblies 2 are connected to the upper half of the eccentric shaft 9 with an upper and lower offset, and the other ends of the piston connecting rods 21 of the two positive-pressure compression assemblies 2 can be reciprocally connected to their respective corresponding cylinders 12; the opposite ends of the piston connecting rods 21 of the two negative-pressure compression assemblies 3 are connected to the lower half of the eccentric shaft 9 with an upper and lower offset, and the other ends of the piston connecting rods 21 of the two negative-pressure compression assemblies 3 can be reciprocally connected to their respective corresponding cylinders 12. In addition, a special self-lubricating coating is applied to the inner walls of the cylinders 12 of the positive-pressure compression assembly 2 and the negative-pressure compression assembly 3, and the special self-lubricating coating can greatly reduce the friction between the piston connecting rod 21 and the cylinder 12. In this way, through the low friction between the piston connecting rod 21 and the cylinder 12, the heat generated by friction can be effectively reduced, and at the same time, the load force increased due to friction can be effectively reduced, thereby reducing the operating output energy consumption.
[0033] Specifically, spacer limit retaining rings 11 are provided at the misaligned docking positions of the opposite ends of the piston connecting rods 21 of the two positive-pressure compression assemblies 2 and the two negative-pressure compression assemblies 3. The spacer limit retaining rings 11 are sleeved on the eccentric shafts 9. By means of the provided spacer limit retaining rings 11, it can be ensured that there will be no leakage between the piston connecting rods 21 and the cylinders 12 due to vehicle vibration.
[0034] Specifically, dynamic sealing leather cups 20 are provided on the piston connecting rods 21. The dynamic sealing leather cups 20 are fixed to the piston connecting rods 21 through leather cup pressing plates 19. The mouths of the dynamic sealing leather cups 20 on the piston connecting rods 21 of the two positive-pressure compression assemblies 2 face away from the piston connecting rods 21, and the mouths of the dynamic sealing leather cups 20 on the piston connecting rods 21 of the two negative-pressure compression assemblies 3 face the piston connecting rods 21.
[0035] Specifically, single-hole one-way valve discs 14 and double-hole one-way valve discs 16 are provided on the valve plate 15. The single-hole one-way valve discs 14 are fixedly connected to the side of the valve plate 15 facing the piston connecting rod 21 through single-hole one-way valve disc pressing plates 13, and the double-hole one-way valve discs 16 are fixedly connected to the side of the valve plate 15 facing the valve cover 18 through double-hole one-way valve disc pressing plates 17.
[0036] Specifically, gas path quick connectors 10 are connected to both the positive-pressure air exchange channels 23 and the negative-pressure air exchange channels 26. The gas path quick connectors 10 on the positive-pressure air exchange channels 23 are respectively used for positive-pressure intake and positive-pressure exhaust, and the gas path quick connectors 10 on the negative-pressure air exchange channels 26 are respectively used for negative-pressure intake and negative-pressure exhaust.
[0037] In the VPSA oil-free compressor for vehicle oxygen production of the present utility model, during one rotation operation of the protection motor 5, the two positive-pressure compression assemblies 2 and the two negative-pressure compression assemblies 3 reciprocate alternately, achieving balanced and non-fluctuating air passing and air exchange, realizing negative-pressure desorption in the vehicle oxygen production process, that is, vacuum desorption, and meeting vehicle oxygen production requirements.
[0038] It can be understood that the above specific description of the present utility model is only for explaining the present utility model and is not limited to the technical solutions described in the embodiments of the present utility model. Those of ordinary skill in the art should understand that the present utility model can still be modified or equivalently replaced to achieve the same technical effects; as long as it meets the use requirements, it is within the protection scope of the present utility model.
Claims
1. A VPSA oil-free compressor for vehicle oxygen production, characterized in that: It includes a fully sealed protective mechanical body and a protective motor, and the fully sealed protective mechanical body and the protective motor are sealed and connected; the fully sealed protective mechanical body includes a positive pressure airway protection structure, a negative pressure airway protection structure, a positive pressure compression component, and a negative pressure compression component. The positive pressure airway protection structure and the negative pressure airway protection structure are connected by a protective seal to form a positive and negative pressure airway protection structure combination. The power output shaft of the protective motor passes through the negative pressure airway protection structure and is placed in the center of the positive and negative pressure airway protection structure combination. The positive and negative pressure airway protection structure combination has two pairs of symmetrical connection ends. A pair of symmetrical connection ports are sealed and connected to the positive-pressure compression assembly, and another pair of symmetrical connection ports are sealed and connected to the negative-pressure compression assembly; the positive-pressure compression assembly is sealed and connected to the positive-pressure ventilation channel on the positive-pressure airway protection structure, and the positive-pressure ventilation channel is arranged on the outer surface of the positive-pressure airway protection structure; the negative-pressure compression assembly is sealed and connected to the negative-pressure ventilation channel on the negative-pressure airway protection structure, and the negative-pressure ventilation channel is arranged on the outer surface of the negative-pressure airway protection structure; the two positive-pressure compression assemblies and the two negative-pressure compression assemblies are vertically connected to the power output shaft of the protection motor in a cross shape.
2. The VPSA oil-free compressor for vehicle oxygen production according to claim 1, characterized in that: An eccentric shaft for connecting to a positive-pressure compression assembly and a negative-pressure compression assembly is sleeved and fixed on the power output shaft of the protection motor. Centralizers are provided at both upper and lower ends of the eccentric shaft. The centralizers are sleeved and fixed on the power output shaft of the protection motor. The centralizer at the upper end of the eccentric shaft is connected to the positive-pressure airway protection structure through a bearing, and the centralizer at the lower end of the eccentric shaft is connected to the negative-pressure airway protection structure through a bearing.
3. The VPSA oil-free compressor for vehicle oxygen production according to claim 2, characterized in that: The positive-pressure airway protection structure is provided with a bearing installation groove and a shockproof and anti-detachment limit frame for fixing and installing the bearing, and the negative-pressure airway protection structure is provided with a bearing fixing seat and a shockproof and anti-detachment limit frame for installing the bearing. The bearing is respectively fixed in the bearing installation groove and the bearing fixing seat by the shockproof and anti-detachment limit frame.
4. The VPSA oil-free compressor for vehicle oxygen production according to claim 2, characterized in that: The positive-pressure compression assembly and the negative-pressure compression assembly both include a cylinder, a valve plate, a valve cover, and a piston connecting rod; one end of the cylinders of the two positive-pressure compression assemblies and one end of the cylinders of the two negative-pressure compression assemblies are correspondingly and sealably connected to the respective connection ports of the positive-pressure and negative-pressure airway protection structure combination, the cylinders of the two positive-pressure compression assemblies are sealed and connected to the positive-pressure ventilation channel, and the cylinders of the two negative-pressure compression assemblies are sealed and connected to the negative-pressure ventilation channel; the other ends of the cylinders of the two positive-pressure compression assemblies and the other ends of the cylinders of the two negative-pressure compression assemblies are sealed and connected to the valve plate, and the valve plate is sealed and connected to the valve cover; the piston connecting rods of the two positive-pressure compression assemblies are connected to the upper half of the eccentric shaft in an up-and-down offset manner at one relative end, and the other ends of the piston connecting rods of the two positive-pressure compression assemblies can be reciprocatingly connected to their respective corresponding cylinders; the piston connecting rods of the two negative-pressure compression assemblies are connected to the lower half of the eccentric shaft in an up-and-down offset manner at one relative end, and the other ends of the piston connecting rods of the two negative-pressure compression assemblies can be reciprocatingly connected to their respective corresponding cylinders.
5. The VPSA oil-free compressor for vehicle oxygen production according to claim 4, characterized in that: The misaligned joints at the opposite ends of the piston connecting rods of the two positive-pressure compression assemblies and the two negative-pressure compression assemblies are all provided with spacing limiting retaining rings, which are sleeved on the eccentric shaft.
6. The VPSA oil-free compressor for vehicle oxygen production according to claim 4, characterized in that: The piston connecting rod is provided with a dynamic sealing leather cup, which is fixed to the piston connecting rod through a leather cup pressure plate; the bowl mouths of the dynamic sealing leather cups on the piston connecting rods of the two positive pressure compression components face away from the piston connecting rod, and the bowl mouths of the dynamic sealing leather cups on the piston connecting rods of the two negative pressure compression components face toward the piston connecting rod.
7. The VPSA oil-free compressor for vehicle oxygen production according to claim 4, characterized in that: The valve plate is provided with a single-hole one-way valve plate and a double-hole one-way valve plate. The single-hole one-way valve plate is fixedly connected to the side of the valve plate facing the piston connecting rod through a single-hole one-way valve plate pressure plate, and the double-hole one-way valve plate is fixedly connected to the side of the valve plate facing the valve cover through a double-hole one-way valve plate pressure plate.
8. The VPSA oil-free compressor for vehicle oxygen production according to claim 1, characterized in that: The positive pressure ventilation channel and the negative pressure ventilation channel are both connected with gas path quick interfaces.
9. The VPSA oil-free compressor for vehicle oxygen production according to claim 1, characterized in that: The upper and lower parts of the protective motor are both provided with waterproof seals, and the middle area of the motor is provided with heat sinks.