Rotary piston type gas compressor

Abstract

The invention relates to a compressor, in particular to a rotary piston type gas compressor which solves the problems that an existing compressor is complex in structure and high in machining cost, a driving device of the rotary piston type gas compressor is connected with a driving shaft in a gas compression device, and a piston assembly comprises a piston cylinder, a piston and N baffle assemblies arranged on the cylinder wall in the circumferential direction; the piston is fixedly arranged on the driving shaft in a sleeving mode and located in a cavity of the piston cylinder. The baffle assembly comprises a hinge column, an elastic reset structure and a hinge baffle connected with the peripheral face of the hinge column. The hinge column is hinged to the cylinder wall. The elastic reset structure is used for providing elastic force for the hinge baffle. The hinge baffle can swing back and forth around the hinge column under the action of the elastic force of the elastic reset structure and the pressure of the side wall of the piston, an air inlet channel and an air outlet channel are formed in the positions, corresponding to the baffle assembly, of the cylinder wall, and an air inlet space and an air compression space with variable volumes are formed between the piston and the piston cylinder through rotation of the piston, so that external low-pressure air is sucked, compressed and exhausted.

Description

Technical Field

[0001] This invention relates to compressors, and more specifically to a rotary piston gas compressor. Background Technology

[0002] Current air conditioners primarily achieve cooling by compressing gas using compressors. Commonly used compressors include swashplate compressors, scroll compressors, and rotary compressors. While swashplate and scroll compressors, commonly used in new energy vehicles, have complex structures and large sizes, household air conditioners typically use dual-rotor or triple-rotor compressors. These rotors are axially connected by a crankshaft, and are often eccentric. Two or three eccentric rotors can cancel out excess torque during rotation, thus preventing excessive vibration. However, this requires extremely high levels of precision in the machining, fitting, and weight distribution of the eccentric rotors and crankshaft; otherwise, excessive vibration will still occur, affecting the user experience. Due to the high precision requirements, the manufacturing costs of these components remain consistently high. Summary of the Invention

[0003] The purpose of this invention is to solve the technical problems of complex structure and high processing cost of existing compressors, and to provide a rotary piston gas compressor.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0005] A rotary piston gas compressor is characterized in that it includes a housing and a drive shaft, a drive device, and a piston assembly disposed within the housing.

[0006] The housing is provided with a main air inlet and a main air outlet;

[0007] The drive shaft is used to connect the piston assembly and the drive device;

[0008] The piston cylinder wall has a cylindrical hollow structure;

[0009] The piston is fixedly sleeved on the drive shaft and located inside the piston cylinder cavity; the cross-section of the piston has N ends, and all N ends abut against the inner side of the piston cylinder wall.

[0010] The N baffle assemblies are circumferentially arranged on the piston cylinder wall; the baffle assembly includes a hinge column, an elastic reset structure, and a hinge baffle connected to the outer circumferential surface of the hinge column;

[0011] The hinge column is hinged to the piston cylinder wall; the elastic reset structure is used to provide elastic force to the hinge baffle; the hinge baffle can reciprocate around the hinge column under the action of the elastic force of the elastic reset structure and the pressure of the piston outer wall;

[0012] The piston cylinder wall is provided with corresponding air inlet and air outlet passages for N baffle assemblies. The air inlet passage is used to connect the main air inlet port with the piston cylinder cavity, and the air outlet passage is used to connect the piston cylinder cavity with the main air outlet port.

[0013] When the piston rotates to the point where the hinge baffle abuts against the end of the piston, the hinge baffle is completely pressed into the piston cylinder wall, the exhaust passage is closed by the hinge baffle, and the intake passage is connected to the intake space.

[0014] As the piston continues to rotate until it abuts against the outer wall between the hinge baffle and the adjacent end of the piston, the hinge baffle pops out of the piston cylinder wall. The piston sidewall, piston cylinder, and the side of the hinge baffle away from the piston form a gradually decreasing compressed air space, which is connected to the air outlet. The piston sidewall, piston cylinder, and the side of the hinge baffle near the piston form a correspondingly increasing air intake space, which is connected to the air intake.

[0015] Furthermore, the driving device is a drive motor or a drive internal combustion engine; the drive shaft and the drive motor or drive internal combustion engine are either an integral structure or separate structures.

[0016] Furthermore, the driving device is a drive motor;

[0017] A bearing is provided on one side of the drive motor, the inner ring of the bearing is fitted onto the drive shaft and the bearing is located in the rotor cavity of the drive motor; or, a bearing is provided on one side of the piston cylinder, the inner ring of the bearing is fitted onto the drive shaft and the bearing is located in the rotor cavity of the drive motor.

[0018] Furthermore, the driving device is a drive motor; a partition is provided inside the housing, the piston assembly is provided on one side of the partition, the drive motor is provided on the other side of the partition, and the main air inlet is located on the housing on one side of the partition, and the main air outlet is located on the housing on the other side of the partition; a bearing is provided on the side of the partition near the drive motor, the inner ring of the bearing is sleeved on the drive shaft and the bearing is located in the rotor cavity of the drive motor.

[0019] Furthermore, the piston has N ends provided with elastic structures for sealing against the piston cylinder wall;

[0020] The elastic structure includes a flexible outer wall located at the piston end and integral with the piston; or, the elastic structure includes a seal mounting groove disposed at the piston end, a sealing block disposed within the seal mounting groove, and an elastic element located between the seal mounting groove and the sealing block; or, the elastic structure includes a seal mounting groove disposed at the piston end and an elastic element located within the seal mounting groove.

[0021] Furthermore, the cross-section of the piston is a regular polygon with N sides, and N is greater than or equal to 3.

[0022] Furthermore, it also includes a one-way valve disposed on the air outlet; the baffle assembly also includes a wear-resistant head disposed at the hinge baffle abutment end.

[0023] Furthermore, the elastic reset structure includes a reset plate connected to the outer peripheral surface of the hinge column and a reset spring; the reset spring is located between the piston cylinder and the reset plate and is used to provide elastic force to the reset plate; or, the elastic reset structure includes a reset spring, the reset spring being located between the piston cylinder and the hinge baffle and being used to provide elastic force to the hinge baffle.

[0024] Furthermore, the piston cylinder includes a cylinder wall and an upper baffle and a lower baffle respectively disposed at the top and bottom of the cylinder wall, and the inner surface of the piston cylinder wall is a cylindrical surface; or, the cylinder wall is integrally disposed with the upper baffle or the lower baffle; or, the cylinder wall includes two upper and lower divided half-cylinder walls and each half-cylinder wall is integrally disposed with the upper baffle or the lower baffle.

[0025] Furthermore, the inlet of the air intake is located on the lower baffle or on the upper baffle, and the outlet of the air outlet is located on the upper baffle or on the lower baffle.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] (1) The present invention provides a rotary piston gas compressor in which the piston is fixedly sleeved on the drive shaft and located in the inner cavity of the piston cylinder. The piston is driven by the drive shaft to rotate concentrically in the piston cylinder. The intake, compression and discharge of external low-pressure gas are realized by the volume change formed between the piston rotation and the piston cylinder. Compared with the traditional dual-rotor or triple-rotor compressor, the piston does not need to be eccentric and only one piston is needed. There is no need to use a crankshaft, which reduces the structural complexity and processing cost.

[0028] (2) The present invention provides a rotary piston gas compressor, wherein an elastic structure is provided at the end of the piston for sealing against the piston cylinder wall. The elastic structure includes a flexible outer wall located at the end of the piston and integral with the piston; or, the elastic structure includes a sealing element mounting groove provided at the end of the piston, a sealing block provided in the sealing element mounting groove, and an elastic element located between the sealing element mounting groove and the sealing block; or, the elastic structure includes a sealing element mounting groove provided at the end of the piston and an elastic element located in the sealing element mounting groove. This allows for adaptive adjustment of the gap between the piston and the piston cylinder wall, ensuring that the end of the piston always abuts against the piston cylinder wall, thereby ensuring a sealing effect, reducing the machining precision of the piston and piston cylinder wall, and saving costs.

[0029] (3) The present invention provides a rotary piston gas compressor, wherein the piston cylinder includes a cylinder wall and an upper baffle and a lower baffle respectively disposed at the top and bottom of the cylinder wall; or, the cylinder wall is integrally disposed with the upper baffle or the lower baffle; or, the cylinder wall includes two upper and lower divided half-cylinder walls, and each half-cylinder wall is integrally disposed with the upper baffle or the lower baffle. This can save processing and assembly steps and reduce costs.

[0030] (4) The rotary piston gas compressor provided by the present invention embeds the bearing supporting the drive shaft into the rotor cavity of the drive motor, which can further reduce the axial dimension of the entire compressor and facilitate installation and use in environments with limited space, such as automobiles. Attached Figure Description

[0031] Figure 1 A three-dimensional structural schematic diagram of an embodiment of a rotary piston gas compressor according to the present invention;

[0032] Figure 2 This is a cross-sectional view of an embodiment of the present invention;

[0033] Figure 3 This is a three-dimensional structural diagram of the drive shaft and piston assembly in an embodiment of the present invention. Figure 1 ;

[0034] Figure 4 This is a three-dimensional structural diagram of the drive shaft and piston assembly in an embodiment of the present invention. Figure 2 (The upper baffle and check valve are not shown);

[0035] Figure 5 for Figure 4 Top view;

[0036] Figure 6 This is a schematic diagram of the structure in an embodiment of the present invention, showing that the piston cylinder wall and the lower baffle are integrally formed.

[0037] Figure 7 This is a schematic diagram of the structure in an embodiment of the present invention, showing that the half-cylinder wall is integrally formed with the upper baffle or the lower baffle.

[0038] Figure 8 This is a schematic diagram of the elastic structure of the flexible outer wall integrated with the piston in an embodiment of the present invention.

[0039] The annotations in the attached figures are explained as follows:

[0040] 1-Drive shaft, 2-Piston, 21-Weight reduction hole; 3-Piston cylinder, 31-Inlet port, 32-Outlet port, 33-Upper baffle, 34-Lower baffle; 4-Sealing block, 5-Baffle assembly, 51-Hinge column, 52-Reset plate, 53-Hinge baffle, 54-Wear-resistant head; 6-One-way valve, 7-Reset spring, 8-Housing, 81-Main inlet port, 82-Main outlet port, 83-Half housing; 9-Drive device, 10-Bearing. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and exemplary embodiments.

[0042] Reference Figures 1-8 The present invention discloses a rotary piston gas compressor comprising a housing 8 and a drive shaft 1, a drive device 9, and a piston assembly disposed within the housing 8. The drive device 9 is either a drive motor or a drive internal combustion engine. The appropriate drive device 9 can be selected according to different installation scenarios; for example, when installed in an electric vehicle, the drive device 9 is a drive motor, and when installed in a gasoline vehicle, the drive device 9 is a drive internal combustion engine. The drive shaft 1 connects the piston assembly and the drive device 9. The drive shaft 1 can be selected as an integral structure or a separate structure from the drive motor or the drive internal combustion engine, depending on the actual situation. In this embodiment, the drive device 9 is a drive motor, and the drive shaft 1 and the drive motor are separate structures.

[0043] To rotate and support the drive shaft 1, a bearing 10 is also required. However, installing the bearing 10 will increase the axial dimension of the compressor. Therefore, the bearing 10 needs to be embedded in the rotor cavity of the drive motor to reduce the overall axial dimension. Thus, the inner ring of the bearing 10 is fitted onto the drive shaft 1 and the bearing 10 is located in the rotor cavity of the drive motor; or, a bearing 10 is provided on one side of the piston cylinder 3, with the inner ring of the bearing 10 fitted onto the drive shaft 1 and the bearing 10 located in the rotor cavity of the drive motor.

[0044] To ensure that the drive motor and piston assembly do not interfere with each other during operation, a partition is provided inside the housing 8. The piston assembly is located on one side of the partition, and the drive motor is located on the other side. The main air inlet 81 is located on the housing 8 on one side of the partition, and the main air outlet 82 is located on the housing 8 on the other side of the partition. A bearing 10 is provided on the side of the partition near the drive motor. The inner ring of the bearing 10 is fitted onto the drive shaft 1, and the bearing 10 is located in the rotor cavity of the drive motor.

[0045] In this embodiment, the structure of the housing 8 is as follows: Figure 1 and Figure 2As shown, the compressor includes two interlocking half-shells 83. A piston assembly is housed in one half-shell 83, and a drive motor is housed in the other half-shell 83. A partition is integrally formed with the half-shell 83 containing the piston assembly. The main air inlet 81 is located on one half-shell 83, and the main air outlet 82 is located on the other half-shell 83. In this embodiment, the main air inlet 81 is located on the half-shell 83 containing the drive motor, and the main air outlet 82 is located on the half-shell 83 containing the piston assembly. This allows the external low-pressure gas to enter the housing 8 through the air inlet 81, first cooling the drive motor and ensuring its stable operating temperature. A bearing 10 for rotatably supporting the drive shaft 1 is provided on the half-shell 83 containing the piston assembly. The inner ring of the bearing 10 is fitted onto the drive shaft 1, and the bearing 10 is located in the rotor cavity of the drive motor. This method of embedding the bearing 10 into the rotor cavity shortens the axial dimension of the entire compressor, making it easier to install in space-constrained locations such as automobiles.

[0046] The piston assembly includes a piston cylinder 3, a piston 2, and N baffle assemblies 5 arranged circumferentially on the cylinder wall of the piston cylinder 3, where N is an integer greater than or equal to 1.

[0047] The piston cylinder 3 has a cylindrical cavity structure on its cylinder wall, and the inner surface of the piston cylinder 3 is cylindrical. The piston 2 is fixedly sleeved on the drive shaft 1 and located inside the cavity of the piston cylinder 3. To reduce its weight, a weight-reducing hole 21 is provided on the piston 2. The cross-section of the piston 2 has N ends, and all N ends abut against the inner surface of the piston cylinder 3. In this embodiment, the cross-section of the piston 2 is a regular polygon with N sides, and N is greater than or equal to 3. Three baffle assemblies 5 are arranged circumferentially on the cylinder wall of the piston cylinder 3. For ease of manufacturing, in this embodiment, N is taken as 3, and the cross-section of the piston 2 is an equilateral triangle with three ends.

[0048] The baffle assembly 5 includes a hinge post 51, a hinge baffle 53 connected to the outer peripheral surface of the hinge post 51, and an elastic reset structure. The hinge post 51 is hinged to the cylinder wall of the piston cylinder 3. The elastic reset structure provides elastic force to the hinge baffle 53. A wear-resistant head 54 is provided at the contact end between the hinge baffle 53 and the outer wall of the piston 2 to improve the service life of the hinge baffle 53. In this way, the hinge baffle 53 can swing back and forth around the hinge post 51 under the elastic force of the elastic reset structure and the pressure of the side wall of the piston 2. In this embodiment, the elastic reset structure includes a reset plate 52 connected to the outer peripheral surface of the hinge post 51 and a reset spring 7. The reset spring 7 is located between the piston cylinder 3 and the reset plate 52 and is used to provide elastic force to the reset plate 52, and then transmit the elastic force to the hinge baffle 53 through the hinge post 51. The structure is simple. Alternatively, the elastic reset structure may only include a reset spring 7, which is located directly between the piston cylinder 3 and the hinge baffle 53. The reset spring 7 directly provides elastic force to the hinge baffle 53. Different elastic reset structures can be selected according to the actual situation.

[0049] In order to cooperate with the hinge baffle 53 and make the rotation smoother, the cross-section of the piston 2 in this embodiment is a special equilateral triangle-Leno triangle, with all three sides being arc-shaped. When the abutting end of the hinge baffle 53 slides on the outer wall of the piston 2, it is smoother and will not hinder the rotation of the piston 2.

[0050] In this embodiment, the piston cylinder 3 includes a cylinder wall and an upper baffle 33 and a lower baffle 34 respectively disposed at the top and bottom of the cylinder wall, as shown in the figure. Figure 3 As shown; to save on machining and assembly processes and reduce costs, the cylinder wall and the upper baffle 33 or lower baffle 34 can be integrated as one piece, such as... Figure 6 As shown, this is the case where the cylinder wall and the lower baffle 34 are integrally formed; or, as... Figure 7 As shown, the cylinder wall includes two upper and lower half-cylinder walls, and each half-cylinder wall is integrally formed with the upper baffle 33 or the lower baffle 34.

[0051] On the cylinder wall of piston cylinder 3, corresponding air inlet passages 31 and air outlet passages 32 are provided at adjacent positions corresponding to the three baffle assemblies 5. Air inlet passage 31 is used to connect the main air inlet port 81 with the inner cavity of piston cylinder 3, and air outlet passage 32 is used to connect the inner cavity of piston cylinder 3 with the main air outlet port 82. The outlet of air inlet passage 31 and the inlet of air outlet passage 32 are both located on the inner side of piston cylinder wall 3. The inlet of air inlet passage 31 is located on the lower baffle 34 or on the upper baffle 33, and the outlet of air outlet passage 32 is located on the upper baffle 33 or on the lower baffle 34, which can be selected according to the actual situation. In this embodiment, the inlet of air inlet passage 31 is located on the lower baffle 34, and the outlet of air outlet passage 32 is located on the upper baffle 34. A one-way valve 6 is correspondingly provided on the air outlet passage 32. In this embodiment, the one-way valve 6 is located at the outlet position of air outlet passage 32 on the upper baffle 34.

[0052] When piston 2 rotates to the point where hinge baffle 53 abuts against the end of piston 2, hinge baffle 53 is completely pressed into the cylinder wall of piston cylinder 3. At this time, the inlet of air outlet 32 ​​can be set corresponding to the side of hinge baffle 53 away from piston 2 or corresponding to the outer end face of hinge baffle 53. In this way, when hinge baffle 53 is completely pressed into the cylinder wall of piston cylinder 3, it can seal air outlet 32. In this embodiment, in order to ensure the sealing effect, such as Figure 5 As shown, the inlet of the exhaust duct 32 corresponds to the side of the hinge baffle 53 away from the piston 2, while the intake duct 31 is connected to the intake space at this time; when the piston 2 continues to rotate until the outer wall between the hinge baffle 53 and the adjacent end of the piston 2 abuts, the hinge baffle 53 pops out of the cylinder wall of the piston cylinder 3; the side wall of the piston 2, the piston cylinder 3 and the side of the hinge baffle 53 away from the piston 2 form a compressed air space with a gradually decreasing volume, which is connected to the exhaust duct 32; the side wall of the piston 2, the piston cylinder 3 and the side of the hinge baffle 53 near the piston 2 form an intake space with a correspondingly increasing volume, which is connected to the intake duct 31.

[0053] To ensure sealing performance while reducing the machining precision of the cylinder wall of piston cylinder 3 and the side wall of piston 2, elastic structures are provided at the three ends of piston 2 for sealing against the cylinder wall of piston cylinder 3. These elastic structures come in three forms, such as... Figure 3 As shown, it includes a seal mounting groove at the end of piston 2, a sealing block 4 disposed within the seal mounting groove, and an elastic element located between the seal mounting groove and the sealing block 4. The elastic force of the elastic element ensures that the sealing block 4 always abuts against the cylinder wall of piston cylinder 3, and a sealing strip is provided between the sealing block 4 and the side wall of the seal mounting groove to ensure that gas does not leak from the seal mounting groove. Alternatively, as Figure 8 As shown, the elastic structure includes a flexible outer wall located at the end of piston 2 and integrally formed with piston 2; alternatively, without the sealing block 4, the elastic structure only includes a sealing element mounting groove located at the end of piston 2 and an elastic element located within the sealing element mounting groove, using the elastic force of the elastic element to achieve sealing. The elastic element can be made of high-temperature resistant rubber. This allows for adaptive adjustment of the gap between piston 2 and the cylinder wall of piston cylinder 3, eliminating the need for high machining and fitting precision to ensure sealing performance, and significantly reducing processing costs.

[0054] In use, the external low-pressure gas enters the housing 8 through the autonomous air inlet 81, then enters through the inlet of the air inlet 31 and enters the air intake space inside the piston cylinder 3 through the outlet of the air inlet 31. As the drive shaft 1 drives the piston 2 to rotate, the low-pressure gas enters the compressed air space. As the piston 2 rotates further, the volume of the compressed air space gradually decreases, the low-pressure gas is compressed, and finally discharged from the outlet 32. The autonomous air outlet 82 enters the external high-pressure gas-using equipment.

[0055] The embodiments described above are merely illustrative of specific implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A rotary piston gas compressor characterized by: The shell (8) is provided with a driving shaft (1), a driving device (9) and a piston assembly arranged in the shell (8); The shell (8) is provided with a main air inlet hole (81) and a main air outlet hole (82); The driving shaft (1) is used for connecting the piston assembly and the driving device (9); The piston assembly comprises a piston cylinder (3), a piston (2) and N baffle assemblies (5); N is an integer greater than or equal to 1; The cylinder wall of the piston cylinder (3) is a cylindrical cavity structure; The piston (2) is fixedly sleeved on the driving shaft (1) and located in the cavity of the piston cylinder (3); the cross section of the piston (2) has N end portions, and each of the N end portions abuts against the inner side surface of the cylinder wall of the piston cylinder (3); The N baffle assemblies (5) are circumferentially arranged on the cylinder wall of the piston cylinder (3); the baffle assembly (5) comprises a hinge column (51), an elastic reset structure and a hinge baffle (53) connected with the outer circumferential surface of the hinge column (51); The hinge column (51) is hinged with the cylinder wall of the piston cylinder (3); the elastic reset structure is used for providing an elastic force to the hinge baffle (53); the hinge baffle (53) can swing back and forth around the hinge column (51) under the action of the elastic force of the elastic reset structure and the pressure of the outer wall of the piston (2); The cylinder wall of the piston cylinder (3) is provided with corresponding air inlet channels (31) and air outlet channels (32) corresponding to the N baffle assemblies (5); the air inlet channel (31) is used for the communication between the main air inlet hole (81) and the inner cavity of the piston cylinder (3); the air outlet channel (32) is used for the communication between the inner cavity of the piston cylinder (3) and the main air outlet hole (82); When the piston (2) rotates to the abutment between the hinge baffle (53) and the end portion of the piston (2), the hinge baffle (53) is completely pressed into the cylinder wall of the piston cylinder (3), the air outlet channel (32) is closed by the hinge baffle (53), and the air inlet channel (31) is communicated with the air inlet space; When the piston (2) continues to rotate to the abutment between the hinge baffle (53) and the adjacent end portion of the piston (2), the hinge baffle (53) is popped out of the cylinder wall of the piston cylinder (3); the side wall of the piston (2), the piston cylinder (3) and the side of the hinge baffle (53) away from the piston (2) form a compression air space with a gradually decreasing volume, which is communicated with the air outlet channel (32); the side wall of the piston (2), the piston cylinder (3) and the side of the hinge baffle (53) close to the piston (2) form an air inlet space with a corresponding increased volume, which is communicated with the air inlet channel (31).

2. The rotary piston gas compressor of claim 1, wherein: The driving device (9) is a driving motor or a driving internal combustion engine; the driving shaft (1) and the driving motor or the driving internal combustion engine are in an integral structure or a split structure.

3. The rotary piston gas compressor according to claim 2, characterized in that: The driving device (9) is a driving motor; One side of the driving motor is provided with a bearing (10), the inner ring of the bearing (10) is sleeved on the driving shaft (1), and the bearing (10) is located in the inner cavity of the rotor of the driving motor; or one side of the piston cylinder (3) is provided with a bearing (10), the inner ring of the bearing (10) is sleeved on the driving shaft (1), and the bearing (10) is located in the inner cavity of the rotor of the driving motor.

4. The rotary piston gas compressor of claim 2, wherein: The driving device (9) is a driving motor; the shell (8) is internally provided with a partition plate, a piston assembly is arranged on one side of the partition plate, the driving motor is arranged on the other side of the partition plate, a main air inlet hole (81) is arranged on the shell (8) on the one side of the partition plate, and a main air outlet hole (82) is arranged on the shell (8) on the other side of the partition plate; a bearing (10) is arranged on the side of the partition plate close to the driving motor, the inner ring of the bearing (10) is sleeved on the driving shaft (1), and the bearing (10) is located in the inner cavity of the rotor of the driving motor.

5. A rotary piston gas compressor according to claim 3 or 4, characterized in that: N end portions of the piston (2) are provided with elastic structures for abutting and sealing with the cylinder wall of the piston cylinder (3); The elastic structure comprises a flexible outer wall located at the end portion of the piston (2) and integrated with the piston (2); or the elastic structure comprises a sealing piece mounting groove arranged at the end portion of the piston (2), a sealing block (4) arranged in the sealing piece mounting groove, and an elastic piece located between the sealing piece mounting groove and the sealing block (4); or the elastic structure comprises a sealing piece mounting groove arranged at the end portion of the piston (2) and an elastic piece located in the sealing piece mounting groove.

6. The rotary piston gas compressor of claim 5, wherein: The cross section of the piston (2) is a regular polygon with N sides, and N is greater than or equal to 3.

7. The rotary piston gas compressor of claim 6, wherein: A one-way valve (6) is further arranged on the air outlet channel (32); the baffle assembly (5) further comprises a wear-resistant head (54) arranged at the abutting end of the hinged baffle (53).

8. The rotary piston gas compressor of claim 7, wherein: The elastic reset structure comprises a reset plate (52) connected to the outer peripheral surface of the hinge column (51) and a reset spring (7); the reset spring (7) is located between the piston cylinder (3) and the reset plate (52) and is used for providing elastic force to the reset plate (52); or the elastic reset structure comprises a reset spring (7), and the reset spring (7) is located between the piston cylinder (3) and the hinged baffle (53) and is used for providing elastic force to the hinged baffle (53).

9. The rotary piston gas compressor according to claim 8, characterized in that: The piston cylinder (3) comprises a cylinder wall and an upper baffle (33) and a lower baffle (34) arranged at the top and bottom of the cylinder wall respectively, and the inner side surface of the cylinder wall of the piston cylinder (3) is a cylindrical surface; Or the cylinder wall and the upper baffle (33) or the lower baffle (34) are integrally arranged; Or the cylinder wall comprises two upper and lower split half cylinder walls, and each half cylinder wall is integrally arranged with the upper baffle (33) or the lower baffle (34) respectively.

10. The rotary piston gas compressor according to claim 9, characterized in that: The inlet of the air inlet channel (31) is located on the lower baffle (34) or on the upper baffle (33), and the outlet of the air outlet channel (32) is located on the upper baffle (33) or on the lower baffle (54).

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