Eccentric structure and air compressor

Abstract

The utility model relates to air compression device technical field, especially in kind of eccentric structure and air compressor, the eccentric structure includes first eccentric part, second eccentric part and axle hole, the axle hole simultaneously penetrates first eccentric part and second eccentric part, first eccentric part and second eccentric part are cylindrical, and both fixed connections, the axis of first eccentric part and second eccentric part sets up in the axis both sides of axle hole. Through setting up the axis is located the first eccentric part and second eccentric part of axle hole axis both sides and fixed connection, a single eccentric structure can provide the driving force of different phase for multiple piston connecting rod mechanism. This integrated design provides the key transmission basis for realizing the compact layout of multiple compression units around the same drive shaft, first eccentric part and second eccentric part fixed connection, thereby make the motion law of each group compression unit connected therewith strict synchronization.

Description

Technical Field

[0001] This utility model relates to the field of air compression device technology, and in particular to an eccentric structure and an air compressor. Background Technology

[0002] An air compressor is a mechanical device that achieves efficient gas compression through the alternating operation of cylinders. Its core structure consists of cylinders, pistons, crankshafts, and a cooling system. It can be arranged vertically or horizontally, and the piston reciprocates through a crankshaft connecting rod mechanism to complete the intake, compression, and exhaust cycles. It is mainly used in automotive air conditioning refrigeration, industrial pneumatic tools, food packaging, and medical equipment.

[0003] Existing eccentric drive structures used to drive multi-cylinder compressors are typically designed in a relatively simple manner. When multiple air compression components need to be integrated into the same base, traditional eccentric shaft structures often struggle to achieve optimized layout and reliable drive of multiple connecting rods within a limited space. Furthermore, the structural strength, wear resistance, and operational stability of the eccentric portion, under long-term alternating stress, directly affect the overall lifespan and noise level of the machine, and existing designs still have room for improvement in these aspects.

[0004] Therefore, there is an urgent need in the prior art for an eccentric structure that is compact and has a high reliability and low vibration transmission structure. Utility Model Content

[0005] Based on the deficiencies of the prior art mentioned in the background section, this utility model aims to provide an eccentric structure with optimized structure and high transmission efficiency to improve the reliability and stability of the transmission system of a multi-cylinder compressor.

[0006] To achieve the above objectives, this utility model provides an eccentric structure, which includes a first eccentric portion, a second eccentric portion, and a shaft hole; the shaft hole passes through both the first eccentric portion and the second eccentric portion; the first eccentric portion and the second eccentric portion are cylindrical and fixedly connected; the axes of the first eccentric portion and the second eccentric portion are located on both sides of the axis of the shaft hole.

[0007] As a further improvement of this utility model, the axes of the first eccentric part and the second eccentric part are located in the same plane as the axis of the shaft hole.

[0008] As a further improvement of this utility model, the first eccentric part and the second eccentric part are an integral structure.

[0009] As a further improvement of this utility model, a first convex ring is provided on the side of the first eccentric portion near the second eccentric portion; and / or a second convex ring is provided on the side of the second eccentric portion near the first eccentric portion.

[0010] As another improvement of this utility model, a third convex ring is provided at the middle of the outer periphery of the first eccentric portion; a fourth convex ring is provided at the middle of the outer periphery of the second eccentric portion. Furthermore, the third and fourth convex rings are detachably connected to the eccentric structure.

[0011] As one of the key improvements of this utility model, the eccentricity between the first and second eccentric parts is e, and their radii are r, satisfying the following relationship: 2.5 ≤ r / e ≤ 2.8. This limitation of parameter range ensures that the eccentric parts have sufficient structural strength and wear resistance while avoiding excessive inertial forces due to overly bulky structures.

[0012] Secondly, this utility model provides an air compressor, including a prime mover, a base, and four compression assemblies. The prime mover includes an output shaft, on which an eccentric structure as described in any one of the first aspects is disposed. The prime mover is mounted at one end of the base. The four compression assemblies are arranged circumferentially along the base and divided into two groups, with two compression assemblies in the same group arranged opposite to each other. Two connecting rods in one group of compression assemblies are rotatably connected to the outer periphery of the first eccentric portion, and two connecting rods in the other group of compression assemblies are rotatably connected to the outer periphery of the second eccentric portion.

[0013] As a further extension of this invention, one set of the compression components is configured as a positive pressure generating structure to generate positive pressure airflow; the other set of the compression components is configured as a negative pressure generating structure to generate negative pressure airflow. This achieves integrated positive and negative pressure functions.

[0014] Furthermore, the compression assembly includes a cylinder, a connecting rod, a piston, and a valve plate. A first end of the connecting rod is rotatably connected to the eccentric structure, and a second end is fixedly connected to the piston. The piston is installed inside the cylinder, and the valve plate is installed at the end of the cylinder away from the connecting rod, and the valve plate is equipped with a one-way valve to control the unidirectional flow of air.

[0015] Compared with the prior art, the technical solution provided by this utility model has the following significant advantages: By setting a first eccentric part and a second eccentric part with their axes located on opposite sides of the shaft hole axis and fixedly connected, a single eccentric structure can provide driving forces with different phases for multiple piston connecting rod mechanisms. This integrated design provides a key transmission foundation for achieving a compact layout of multiple compression units around the same drive shaft, and is particularly suitable for multi-cylinder compressors with strict space requirements. The fixed connection between the first and second eccentric parts ensures that their relative phase remains constant during operation, thereby ensuring strict synchronization of the motion patterns of each set of compression units connected to it. This fundamentally avoids vibration, noise, and reliability problems that may be caused by loose transmission chains or phase drift, laying a solid foundation for the smooth operation of the entire machine.

[0016] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a perspective view of an air compressor according to one embodiment of the present invention; Figure 2 This is a top view of an air compressor according to one embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of an air compressor according to one embodiment of the present invention; Figure 4 This is a partial structural schematic diagram of an air compressor according to one embodiment of the present invention; Figure 5 This is a schematic diagram of the piston structure according to one embodiment of the present invention; Figure 6 This is a schematic diagram of the piston structure according to one embodiment of the present invention; Figure 7 This is a schematic diagram of the eccentric structure according to one embodiment of the present invention; Figure 8 This is a schematic diagram of the eccentric structure according to one embodiment of the present invention; Figure 9 This is a schematic diagram of the eccentric structure according to one embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: Detailed Implementation

[0019] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0021] It should be noted that the terms "first," "second," "third," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] This utility model aims to provide an eccentric structure with optimized structure and high transmission efficiency to improve the reliability and stability of a multi-cylinder compressor transmission system. An eccentric structure is provided, such as... Figure 7 and Figure 8 As shown, the eccentric structure includes a first eccentric part 121, a second eccentric part 122, and a shaft hole 123; the shaft hole 123 passes through both the first eccentric part 121 and the second eccentric part 122; the first eccentric part 121 and the second eccentric part 122 are cylindrical and are fixedly connected; the axes of the first eccentric part 121 and the second eccentric part 122 are located on both sides of the axis of the shaft hole 123.

[0023] By setting a first eccentric part 121 and a second eccentric part 122 with their axes located on both sides of the axis of the shaft hole 123 and fixedly connected, a single eccentric structure can provide driving forces with different phases for multiple piston 53 connecting rod 52 mechanisms. This integrated design provides a key transmission basis for realizing a compact layout of multiple compression units around the same drive shaft, and is particularly suitable for multi-cylinder compressors with strict space requirements; the fixed connection between the first eccentric part 121 and the second eccentric part 122 ensures that the relative phase between them remains unchanged during operation, thereby making the motion of each set of compression units connected to it strictly synchronized. This fundamentally avoids vibration, noise and reliability problems that may be caused by loose transmission chains or phase drift, laying a solid foundation for the smooth operation of the whole machine.

[0024] As a further improvement of this utility model, the axes of the first eccentric portion 121 and the second eccentric portion 122 are located in the same plane as the axis of the shaft hole 123.

[0025] As a further improvement of this utility model, the first eccentric part 121 and the second eccentric part 122 are an integral structure. This arrangement allows different connecting rods 52 to be in different working states, enabling the air compressor to deliver stable output.

[0026] As a further improvement of this utility model, a first convex ring 124 is provided on the side of the first eccentric portion 121 near the second eccentric portion 122; and / or a second convex ring 125 is provided on the side of the second eccentric portion 122 near the first eccentric portion 121. In the above, since the contact area between the first eccentric portion 121 and the second eccentric portion 122 is limited, a first convex ring 124 or a second convex ring 125 is provided to enhance the connection stability between them; specifically, the diameter of the first convex ring 124 or the second convex ring 125 is larger than the diameter of the first eccentric portion 121 or the second eccentric portion 122. This arrangement increases the contact area between the first eccentric portion 121 and the second eccentric portion 122, thereby enhancing the connection stability between them; simultaneously, since the connecting rod 52 is not directly installed on the first eccentric portion 121 and the second eccentric portion 122... The outer periphery of the eccentric portion 122 is rotatably connected to the eccentric structure via a bearing. During installation, the bearing directly contacts the first convex ring 124 or the second convex ring 125, which can position the bearing. Furthermore, the first convex ring 124 can prevent the bearing mounted on the first eccentric portion 121 from directly contacting the end face of the second eccentric portion 122, and the second convex ring 125 can prevent the bearing mounted on the second eccentric portion 122 from directly contacting the end face of the first eccentric portion 121, thereby avoiding unnecessary wear and abnormal noise.

[0027] Furthermore, such as Figure 8As shown, a third convex ring 126 is provided at the center of the outer periphery of the first eccentric portion 121; a fourth convex ring 127 is provided at the center of the outer periphery of the second eccentric portion 122. Furthermore, the third convex ring 126 and the fourth convex ring 127 are detachably connected to the eccentric structure. When the first eccentric portion 121 needs to cooperate with multiple connecting rods 52 simultaneously, the third convex ring 126 can space out the multiple connecting rods 52, preventing direct contact between adjacent connecting rods 52; simultaneously, the third convex ring 126 can space out the bearings cooperating with adjacent connecting rods 52, preventing contact between adjacent bearings. Similarly, the fourth convex ring 127 can also prevent direct contact between adjacent connecting rods 52 and bearings.

[0028] As one of the key improvements of this utility model, such as Figure 9 As shown, the eccentricity of the first eccentric part 121 and the second eccentric part 122 is e, and their radius is r, satisfying the following relationship: 2.5 ≤ r / e ≤ 2.8. This parameter range ensures that the eccentric parts have sufficient structural strength and wear resistance while avoiding excessive inertial force due to overly bulky structures. By limiting the ratio of radius to eccentricity r / e to the range of 2.5 to 4, synergistic optimization of eccentric structural strength and service life is achieved. When r / e ≥ 2.5, the first eccentric part 121 and the second eccentric part 122 have sufficient radial thickness to effectively resist the alternating stress transmitted by the connecting rod 52, preventing plastic deformation or fatigue cracks caused by excessively thin walls; when r / e ≤ 2.8, material waste, excessive rotational inertia, and increased inertial force due to overly bulky structures are avoided, ensuring the sensitivity of power transmission. Simultaneously, in this mechanism, the stroke S of the piston 53 is directly determined by the eccentricity e, with the relationship S = 2e. The swing angle β of connecting rod 52 (β=arcsin(e / L) = arcsin(S / 2L)) is a key parameter affecting the lateral force and frictional loss of the compressor. By limiting r / e to the range of 2.5 to 2.8, a suitable swing angle is achieved for connecting rod 52 when the stroke S of piston 53 is fixed. A suitable swing angle means that the lateral pressure of piston 53 on the cylinder wall of cylinder 51 is significantly reduced. This not only reduces the friction and wear between piston rings and cylinder wall of cylinder 51, extending the life of cylinder assembly, but also further reduces operating noise and improves the overall mechanical efficiency and smoothness of the machine.

[0029] Secondly, this utility model provides an air compressor, such as... Figure 1As shown, it includes a prime mover 1, a base 2, and four compression assemblies 5; the prime mover 1, used to provide rotational power, includes an internal combustion engine or an electric motor, and includes an output shaft 11; the output shaft 11 is provided with an eccentric structure as described in any of the first aspects above; the prime mover 1 is mounted at one end of the base 2; the base 2 includes multiple sides 21, which surround to form an installation space, the prime mover 1 is mounted on one of the sides 21, the output shaft 11 of the prime mover 1 extends into the installation space, and the side 21 has mounting holes 22; the compression assemblies 5 are mounted on the mounting holes 22; as shown... Figure 3 , Figure 5 and Figure 6 As shown, the four compression components 5 are arranged circumferentially along the base 2 and divided into two groups, with the two compression components 5 in the same group arranged opposite each other. Two connecting rods 52 in one group of compression components 5 are rotatably connected to the outer periphery of the first eccentric part 121, and two connecting rods 52 in the other group of compression components 5 are rotatably connected to the outer periphery of the second eccentric part 122.

[0030] When the prime mover 1 starts, the output shaft 11 drives the eccentric structure to rotate. The first eccentric part 121 and the second eccentric part 122 respectively drive the two connecting rods 52 connected to them to move. Due to the phase difference between the two eccentric parts, the reciprocating motion of the four pistons 53 is coordinated with each other, which can effectively balance the inertial force, thereby achieving smooth and low-vibration operation of the whole machine. This universal structure provides a highly compact physical platform for the multi-functional integration of air compressors.

[0031] As a further extension of this utility model, one set of the compression components 5 is configured as a positive pressure generating structure 3 to generate positive pressure airflow; the other set of the compression components 5 is configured as a negative pressure generating structure 4 to generate negative pressure airflow; thereby realizing the integrated positive and negative pressure functions.

[0032] In the above description, the positive pressure generating structure 3 includes a positive pressure inlet 31 and a positive pressure outlet 32. The positive pressure generating structure 3 is used to compress the low-pressure gas entering from the positive pressure inlet 31 and discharge it from the positive pressure outlet 32. The positive pressure generating structure 3 is connected to a mounting hole 22. The prime mover 1 cooperates with the positive pressure generating structure 3 and drives the positive pressure generating structure 3 to move. The negative pressure generating structure 4 includes a negative pressure inlet 41 and a negative pressure outlet 42. The negative pressure generating structure 4 is used to compress the low-pressure gas drawn in by the negative pressure inlet 41 and discharge it from the negative pressure outlet 42. The negative pressure generating structure 4 is connected to a mounting hole 22. The prime mover 1 cooperates with the negative pressure generating structure 4 and drives the negative pressure generating structure 4 to move.

[0033] Furthermore, the compression assembly 5 includes a cylinder 51, a connecting rod 52, a piston 53, and a valve plate 54. The first end of the connecting rod 52 is rotatably connected to the eccentric structure, and the second end is fixedly connected to the piston 53. The piston 53 is installed inside the cylinder 51, and the valve plate 54 is installed at the end of the cylinder 51 away from the connecting rod 52, and the valve plate 54 is provided with a one-way valve 56 for controlling the unidirectional flow of air.

[0034] According to one embodiment of the present invention, a one-way valve 56 is provided on the valve plate 54, which allows gas to pass through the valve plate 54 from the cylinder 51; a one-way valve 56 is provided on the piston 53, which allows gas to pass through the piston 53 from the sealed space and enter the cylinder 51; according to another embodiment of the present invention, two one-way valves 56 are provided on the valve plate 54, one of which allows gas to pass through the valve plate 54 from the cylinder 51; the other one-way valve 56 allows gas to pass through the valve plate 54 from the outside and enter the cylinder 51. The reciprocating motion of the piston 53 realizes the compression and intake of gas.

[0035] To improve work efficiency, such as Figure 2 As shown, there are two positive pressure cylinder assemblies 33, which are arranged on two opposite sides 21 of the base 2; preferably, when one positive pressure cylinder assembly 33 compresses gas, the other positive pressure cylinder assembly 33 draws in gas.

[0036] The number of negative pressure cylinder assemblies 43 is two, and the two negative pressure cylinder assemblies 43 are arranged on two opposite sides 21 of the base 2. Preferably, when one negative pressure cylinder assembly 43 is compressing gas, the other negative pressure cylinder assembly 43 is drawing in gas. This arrangement makes the power output of the prime mover 1 smooth and the noise low during rotation. At the same time, it can also reduce the maximum power of the prime mover 1, which is beneficial to reducing the overall size and weight of the machine.

[0037] Furthermore, the positive pressure cylinder assembly 33 and the negative pressure cylinder assembly 43 are arranged at intervals.

[0038] Furthermore, the first eccentric portion 121 and the second eccentric portion 122 are cylindrical, the shaft hole 123 is a circular hole, and the axes of the first eccentric portion 121 and the second eccentric portion 122 are arranged on both sides of the axis of the shaft hole 123, and are located in the same plane as the axis of the shaft hole 123. Furthermore, this configuration effectively reduces the vibration of the entire machine. Specifically, when one of the positive pressure cylinder assemblies 33 is compressed, the center of gravity of the positive pressure generating mechanism and the first eccentric part 121 is biased towards the positive pressure cylinder assembly 33. At this time, the center of gravity of the negative pressure generating mechanism and the second eccentric part 122 is biased towards the other positive pressure cylinder assembly 33, thereby offsetting the vibration caused by the change in center of gravity. Similarly, when one of the negative pressure cylinder assemblies 43 is compressed, the center of gravity of the positive pressure generating mechanism and the second eccentric part 122 is biased towards the negative pressure cylinder assembly 43. At this time, the center of gravity of the positive pressure generating mechanism and the first eccentric part 121 is biased towards the other negative pressure cylinder assembly 43, thereby offsetting the vibration caused by the change in center of gravity.

[0039] In one embodiment, such as Figure 4 As shown, the cylinders 51 of the two positive pressure cylinder assemblies 33 are coaxially arranged; the cylinders 51 of the two negative pressure cylinder assemblies 43 are also coaxially arranged. This arrangement helps to compress the length of the positive and negative pressure air compressor in the axial direction of the output shaft 11, thereby reducing the overall length of the positive and negative pressure air compressor.

[0040] To ensure the coaxial arrangement of the positive pressure cylinder assembly 33 and the negative pressure cylinder assembly 43, the connection point between the connecting rod 52 and the piston 53 is located outside the axis of the piston 53. In one embodiment, in the interconnected connecting rod 52 and piston 53, the connecting rod 52 is offset relative to the axis of the piston 53.

[0041] In one embodiment, the plurality of sides 21 of the base 2 enclose a sealed space, the positive pressure air inlet 31 is disposed on the side 21, connecting the sealed space with the outside air, and the piston 53 of the positive pressure cylinder assembly 33 is provided with a one-way valve 56, such as Figure 6As shown, the positive pressure outlet 32 ​​is connected to the one-way valve 56 on the valve plate 54. Specifically, the base 2, the positive pressure cylinder assembly 33, and the negative pressure cylinder assembly 43 together form the sealed space. External gas enters the sealed space through the positive pressure inlet 31 and passes through the one-way valve 56 on the piston 53 of the positive pressure cylinder assembly 33, entering between the cylinder 51 and the valve plate 54, thereby enabling the piston 53 to compress this portion of gas. This arrangement, on the one hand, helps improve the intake efficiency and compression efficiency of the positive pressure cylinder assembly 33; on the other hand, the continuous flow of external gas can provide continuous forced air cooling for the components within the sealed space, which is beneficial to improving the working continuity and stability of the positive and negative pressure air compressor.

[0042] In one embodiment, such as Figure 4 As shown, the negative pressure cylinder assembly 43 also includes a cylinder head 55, which is fixedly connected to the cylinder 51. A valve plate 54 is disposed between the cylinder head 55 and the cylinder 51, forming a first sealing area 57 and a second sealing area 58 between the cylinder head 55 and the valve plate 54. A one-way valve 56 is respectively disposed on the valve plate 54 at a position corresponding to the first sealing area 57 and the second sealing area 58, and the two one-way valves 56 have opposite conduction directions. The negative pressure inlet 41 and the negative pressure outlet 42 are respectively connected to one of the one-way valves 56. External gas enters between the cylinder 51 and the piston 53 through the first sealing area 57. After being compressed, the gas enters the second sealing area 58 again through the valve plate 54 and is discharged through the negative pressure outlet 42, thereby realizing negative pressure output. By providing independent negative pressure inlet 41 and negative pressure outlet 42, as well as a gas flow pipeline, the gas flow path of the negative pressure generating structure 4 is made independent of the positive pressure generating mechanism, thereby enabling the positive and negative pressure air compressor to simultaneously achieve positive and negative pressure output. It should be noted that, for the foregoing method embodiments, for the sake of simplicity, they are all described as a series of actions. However, those skilled in the art should understand that this utility model is not limited to the described order of actions, because according to this utility model, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this utility model.

[0043] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0044] In the several embodiments provided by this utility model, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical or other forms.

[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An eccentric structure, characterized in that, include: The shaft hole (123) consists of a first eccentric part (121), a second eccentric part (122), and a shaft hole (123). The shaft hole (123) passes through both the first eccentric part (121) and the second eccentric part (122). The first eccentric part (121) and the second eccentric part (122) are cylindrical and are fixedly connected. The axes of the first eccentric part (121) and the second eccentric part (122) are located on both sides of the axis of the shaft hole (123).

2. The eccentric structure according to claim 1, characterized in that, The axes of the first eccentric portion (121) and the second eccentric portion (122) are located in the same plane as the axis of the shaft hole (123).

3. The eccentric structure according to claim 1, characterized in that, The first eccentric part (121) and the second eccentric part (122) are an integral structure.

4. The eccentric structure according to claim 1, characterized in that, The first eccentric portion (121) is provided with a first protruding ring (124) on the side near the second eccentric portion (122); and / or The second eccentric portion (122) is provided with a second protruding ring (125) on the side near the first eccentric portion (121).

5. The eccentric structure according to claim 1, characterized in that, A third protruding ring (126) is provided at the middle of the outer periphery of the first eccentric part (121); a fourth protruding ring (127) is provided at the middle of the outer periphery of the second eccentric part (122).

6. The eccentric structure according to claim 5, characterized in that, The third convex ring (126) and the fourth convex ring (127) are detachably connected to the eccentric structure.

7. The eccentric structure according to claim 1, characterized in that, The eccentricity of the first eccentric part (121) and the second eccentric part (122) is e, and the radius of the first eccentric part (121) and the second eccentric part (122) is r, satisfying: 2.5≤r / e≤2.

8.

8. An air compressor, characterized in that, include: Prime mover (1), the prime mover (1) includes an output shaft (11), the output shaft (11) is provided with an eccentric structure (12) as described in any one of claims 1 to 7. The base (2) is on which the prime mover (1) is mounted at one end; Four compression components (5) are arranged circumferentially along the base (2) and divided into two groups, with two compression components (5) in the same group arranged opposite each other. Two connecting rods (52) in one set of the compression assembly (5) are rotatably connected to the outer periphery of the first eccentric part (121), and two connecting rods (52) in another set of the compression assembly (5) are rotatably connected to the outer periphery of the second eccentric part (122).

9. The air compressor according to claim 8, characterized in that, A set of the compression components (5) is a positive pressure generating structure (3) for generating positive pressure airflow, including a positive pressure inlet (31) and a positive pressure outlet (32). The positive pressure generating structure (3) is used to compress the low-pressure gas entering from the positive pressure inlet (31) and discharge it from the positive pressure outlet (32). The prime mover (1) cooperates with the positive pressure generating structure (3) and drives the positive pressure generating structure (3) to move. Another set of the compression components (5) is a negative pressure generating structure (4) for generating negative pressure airflow, including a negative pressure inlet (41) and a negative pressure outlet (42). The negative pressure generating structure (4) is used to compress the low-pressure gas drawn in by the negative pressure inlet (41) and discharge it from the negative pressure outlet (42). The prime mover (1) cooperates with the negative pressure generating structure (4) and drives the negative pressure generating structure (4) to move.

10. The air compressor according to claim 9, characterized in that, The compression assembly (5) includes a cylinder (51), a connecting rod (52), a piston (53), and a valve plate (54). The first end of the connecting rod (52) is rotatably connected to the eccentric structure (12), and the second end of the connecting rod (52) is fixedly connected to the piston (53). The piston (53) is installed inside the cylinder (51), and the valve plate (54) is installed at the end of the cylinder (51) away from the connecting rod (52). A one-way valve (56) is provided on the valve plate (54).

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