Pump body assembly and compressor

Abstract

The invention provides a pump body assembly and a compressor. The pump body assembly comprises an air cylinder body, an air suction piece and a piston. A compression cavity is formed in the air cylinder body, and the piston reciprocates in the compression cavity. The air suction piece is installed on the air cylinder body, covers the compression cavity and is provided with an air suction valve piece, and the air suction piece is provided with a vent groove surrounding the outer contour of the air suction valve piece. The air suction piece is further provided with an air suction piece exhaust hole and a communicating groove, the end face of the air suction piece serves as a projection plane, one end of the communicating groove intersects with the outer circle contour line of the piston, the other end of the communicating groove communicates the air suction piece exhaust hole with the vent groove, and therefore air near the inner wall face of the compression cavity is exhausted from the air suction piece exhaust hole. One end of the communicating groove intersects with the outer circle contour line of the piston, and the other end of the communicating groove communicates the air suction piece exhaust hole with the vent groove, so that high-pressure air near the inner wall face of the air cylinder can be exhausted more quickly.

Description

Technical Field

[0001] This invention belongs to the field of compressor technology, specifically relating to a pump assembly and a compressor. Background Technology

[0002] During the operation of a piston compressor, the piston reciprocates linearly within the cylinder. The approximate exhaust direction of the high-pressure gas within the cylinder is consistent with the piston's movement direction, perpendicular to the piston end face and pointing towards the valve seat exhaust port. At this point, the minimum exhaust flow cross-sectional area is equal to the cross-sectional area of ​​the valve seat exhaust port. As the piston continues to move towards the top dead center position, the linear distance between the piston and the exhaust port decreases to the order of tens of micrometers. At this point, the approximate exhaust direction of the high-pressure gas within the cylinder is perpendicular to the piston's movement direction, parallel to the piston end face, extending from the cylinder wall towards the valve seat exhaust port. The minimum flow area then becomes the product of the linear distance between the piston and the valve seat exhaust port and the circumference of the valve seat exhaust port, which is much smaller than the cross-sectional area of ​​the valve seat exhaust port. As the linear distance between the piston and the valve seat exhaust port decreases, the minimum exhaust flow area becomes smaller and smaller, leading to increased exhaust resistance and higher gas pressure within the cylinder, resulting in overcompression. This is especially problematic at high frequencies, where the time required to expel a unit volume of high-pressure gas from the cylinder decreases, further increasing exhaust resistance and resulting in even higher pressure within the cylinder. This exacerbates the overcompression, leading to increased compressor power consumption, reduced cooling capacity, and no advantage in high-frequency energy efficiency. The intake vane of a piston compressor is usually a thin sheet stamped part. The shape of the valve is punched out by a stamping die. After punching, it is the intake valve cavity groove. This cavity groove surrounds the entire intake valve and is connected to the inner cavity of the cylinder. When the piston moves to the position close to the top dead center, the high pressure gas in the cylinder cavity and the intake valve cavity groove has high exhaust resistance and high power consumption. Summary of the Invention

[0003] This invention provides a pump assembly and a compressor that can solve the technical problem of high exhaust resistance and high power consumption of high-pressure gas in the cylinder cavity and intake valve plate cavity groove when the piston moves to near the top dead center position.

[0004] This invention provides a pump body assembly, which includes a cylinder body, a suction vane, and a piston;

[0005] The cylinder body has a compression chamber, and the piston reciprocates in the compression chamber; the suction plate is installed on the cylinder body, the suction plate covers the compression chamber, the suction plate is provided with a suction valve plate, and the suction plate has a ventilation groove around the outer contour of the suction valve plate.

[0006] The suction plate is also provided with a suction plate exhaust hole and a connecting groove. With the end face of the suction plate as the projection plane, one end of the connecting groove intersects with the outer circle contour line of the piston, and the other end of the connecting groove connects the suction plate exhaust hole with the ventilation groove, so that the gas near the inner wall of the compression chamber is discharged from the suction plate exhaust hole.

[0007] In some embodiments, the end face of the air intake plate is used as the projection plane, and the air groove intersects with the outer contour line of the piston or the air groove is located in the outer contour line of the piston.

[0008] In some embodiments, with the end face of the suction plate as the projection plane, the venting groove intersects the outer contour line of the piston, and the connecting groove includes a first groove segment and a second groove segment. One end of the first groove segment intersects the outer contour line of the piston, and the other end of the first groove segment communicates with the exhaust hole of the suction plate; one end of the second groove segment communicates with the exhaust hole of the suction plate, and the other end of the second groove segment communicates with the venting groove.

[0009] In some embodiments, the exhaust port of the intake plate is located radially outside the intake valve plate, and the ventilation groove includes a head groove, a middle groove and a tail groove. With the end face of the intake plate as the projection plane, the head groove and the tail groove both intersect the outer circle contour line of the piston. One end of the second groove section is connected to the exhaust port of the intake plate, and the other end of the second groove section is connected to the middle groove.

[0010] In some embodiments, exhaust holes for the intake valve are provided on both sides of the intake valve, and one end of the second groove is connected to the exhaust hole for the intake valve, while the other end of the second groove is connected to the central groove.

[0011] In some embodiments, the suction plate is provided with two suction valve plates, which are arranged side by side. The suction plate has a first ventilation groove and a second ventilation groove respectively around the outer contour of the two suction valve plates. The connecting groove includes a first groove segment, a second groove segment, and a third groove segment. One end of the first groove segment intersects with the outer contour line of the piston, and the other end of the first groove segment communicates with the exhaust hole of the suction plate. The two ends of the second groove segment are respectively connected to the first ventilation groove and the second ventilation groove. One end of the third groove segment communicates with the second groove segment, and the other end of the third groove segment communicates with the exhaust hole of the suction plate.

[0012] In some embodiments, the exhaust port of the intake plate is opened between the two intake valve plates. The first venting groove and the second venting groove each include a head groove, a middle groove, and a tail groove. With the end face of the intake plate as the projection plane, the head groove and the tail groove of the first venting groove and the second venting groove intersect the outer circle contour line of the piston. The middle grooves of the first venting groove and the second venting groove are arranged adjacent to each other on the inner side. The two ends of the second groove segment are respectively connected to the middle grooves of the first venting groove and the second venting groove.

[0013] In some embodiments, the suction plate is provided with two suction valve plates, which are arranged side by side. The suction plate has a first vent groove and a second vent groove respectively around the outer contour of the two suction valve plates. With the end face of the suction plate as the projection plane, the first vent groove and the second vent groove intersect the outer contour line of the piston. The first vent groove and the second vent groove are respectively connected to the exhaust hole of the suction plate.

[0014] In some embodiments, the exhaust port of the intake plate is opened between the two intake valve plates, and both the first venting groove and the second venting groove include a head groove, a middle groove and a tail groove; with the end face of the intake plate as the projection plane, the head groove and the tail groove of the first venting groove and the second venting groove intersect with the outer circle contour line of the piston, and the inner side of the middle groove of the first venting groove and the second venting groove are respectively connected to the exhaust port of the intake plate;

[0015] When a valve seat is also included, the intake plate is installed between the valve seat and the cylinder body, the valve seat is provided with a valve seat exhaust hole, the intake plate exhaust hole is coaxially arranged with the valve seat exhaust hole, and the intake plate exhaust hole communicates with the valve seat exhaust hole.

[0016] In some embodiments, with the end face of the intake plate as the projection plane, the venting groove is located within the outer circumference of the piston. The venting groove includes a head groove, a middle groove, and a tail groove. The connecting groove includes a first groove segment, a second groove segment, and a third groove segment. One end of the first groove segment intersects with the outer circumference of the piston, and the other end of the first groove segment communicates with the head groove. One end of the second groove segment intersects with the outer circumference of the piston, and the other end of the second groove segment communicates with the tail groove. One end of the third groove segment communicates with the exhaust port of the intake plate, and the other end of the third groove segment communicates with the middle groove.

[0017] In some embodiments, the suction plate is provided with two suction valve plates, which are arranged side by side. The suction plate has a first ventilation groove and a second ventilation groove respectively around the outer contour of the two suction valve plates. The first ventilation groove and the second ventilation groove each include the head groove, the middle groove and the tail groove.

[0018] The third groove segment includes a first groove and a second groove. The two ends of the first groove are respectively connected to the middle groove of the first ventilation groove and the second ventilation groove. One end of the second groove is connected to the first groove, and the other end of the second groove is connected to the exhaust hole of the air intake plate.

[0019] A compressor includes a pump body assembly, the pump body assembly being the pump body assembly described above.

[0020] The pump assembly and compressor provided by the present invention have the following beneficial effects:

[0021] In this invention, one end of the connecting groove intersects with the outer contour line of the piston, and the other end connects the exhaust port of the intake plate with the ventilation groove. Under the action of pressure difference, the high-pressure gas near the inner wall of the cylinder provides a new exhaust path for the high-pressure gas near the inner wall of the cylinder through the connecting groove, avoiding the gas from being discharged only through the narrow channel formed by the extremely small straight-line distance between the piston and the valve seat exhaust port, thereby reducing exhaust resistance. When the piston is close to the top dead center position, without the connecting groove, the exhaust resistance of the high-pressure gas in the cylinder will become increasingly large, and the gas pressure will become increasingly high, resulting in overcompression. This leads to increased power consumption and reduced cooling capacity of the compressor. However, the setting of the connecting groove allows the high-pressure gas near the inner wall of the cylinder to be discharged through the connecting groove in advance, reducing the pressure of the high-pressure gas in the cylinder and reducing overcompression. This helps to balance the pressure distribution in the cylinder, preventing the gas pressure from rising excessively, thereby reducing the power consumption of the compressor and improving its energy efficiency. The presence of the connecting groove allows high-pressure gas near the inner wall of the cylinder to be discharged more quickly. During the piston movement, the gas enters the connecting groove from the gap between the outer contour of the piston and the inner wall of the compression chamber, and then is discharged through the exhaust port of the intake plate. This process reduces the residence time of the gas in the cylinder, improves the exhaust efficiency, and enables the compressor to discharge more gas in the same amount of time, thereby improving its overall working efficiency. Attached Figure Description

[0022] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the pump body assembly according to an embodiment of the present invention;

[0024] Figure 2 This is a cross-sectional view of the pump body assembly according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram showing that the exhaust port of the intake plate is located on the radial outer side of the intake valve plate according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of an embodiment of the present invention, showing that the air intake plate is provided with two air intake valve plates and the air passage intersects with the outer contour line of the piston.

[0027] Figure 5This is a schematic diagram showing that the first and second venting slots of this invention are respectively connected to the exhaust port of the air intake plate;

[0028] Figure 6 This is a schematic diagram showing the vent groove located within the outer contour line of the piston according to an embodiment of the present invention.

[0029] Attached Figures: 1-Cylinder body; 101-Compression chamber; 2-Intake vane; 201-Ventilation groove; 211-Head groove; 212-Middle groove; 213-Tail groove; 202-Intake vane exhaust port; 203-Connecting groove; 231-First groove segment; 232-Second groove segment; 233-Third groove segment; 241-First groove; 242-Second groove; 235-Fourth groove segment; 3-Piston; 4-Intake valve plate; 5-Valve seat; 501-Valve seat exhaust port. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0032] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used here to describe the spatial positional relationship of a device or feature as shown in the figure with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device as described in the figure. For example, if a device in the figure is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures.

[0033] See also Figures 1 to 6 As shown, according to an embodiment of the present invention, a pump body assembly is provided, which includes a cylinder body 1, a suction vane 2, and a piston 3; a compression chamber 101 is provided in the cylinder body 1, and the piston 3 reciprocates in the compression chamber 101; the suction vane 2 is mounted on the cylinder body 1, the suction vane 2 covers the compression chamber 101, a suction valve 4 is provided on the suction vane 2, and a ventilation groove 201 is provided around the outer contour of the suction valve 4; the suction vane 2 is also provided with a suction vane exhaust hole 202 and a connecting groove 203, with the end face of the suction vane 2 as the projection plane, one end of the connecting groove 203 intersects the outer contour line of the piston 3, and the other end of the connecting groove 203 connects the suction vane exhaust hole 202 and the ventilation groove 201, so that the gas near the inner wall of the compression chamber 101 is discharged from the exhaust port.

[0034] It is worth noting that the pump body assembly also includes a valve seat 5. The suction vane 2 is installed between the valve seat 5 and the cylinder body 1. The valve seat 5 is provided with a valve seat exhaust port 501. Correspondingly, in order to allow the compressed gas to be discharged, the suction vane 2 is provided with a suction vane exhaust port 202 that communicates with the valve seat exhaust port 501. The ventilation groove 201 formed after the suction valve 4 is opened on the suction vane 2 is not connected to the suction vane exhaust port 202 and the valve seat exhaust port 501. Therefore, after the piston 3 moves to the top dead center, the gas not only flows on the inner wall of the compression chamber 101, but also exists in the ventilation groove 201, resulting in high exhaust resistance.

[0035] Specifically, as piston 3 continues to move upwards towards top dead center, the straight-line distance between piston 3 and the exhaust port decreases to the order of tens of micrometers. At this time, the approximate exhaust direction of the high-pressure gas in the cylinder changes, becoming perpendicular to the direction of piston 3's movement and parallel to the piston 3's end face, pointing from the cylinder wall towards the intake plate exhaust port 202 and the valve seat exhaust port 501. Since one end of the connecting groove 203 intersects with the outer contour line of piston 3, the high-pressure gas near the inner wall of the cylinder will leak out from the gap between the outer contour line of piston 3 and the inner wall of compression chamber 101 under the action of pressure difference, and then enter one end of the connecting groove 203 (the intersection with the outer contour line of piston 3). After entering the connecting groove 203, the gas flows along the inner wall of the connecting groove 203 to the other end. The other end of the connecting groove 203 connects the exhaust port 202 of the suction plate with the ventilation groove 201. When the gas reaches the other end of the connecting groove 203, it will flow into the exhaust port 202 of the suction plate. At the same time, the gas in the ventilation groove 201 will also flow into the exhaust port 202 of the suction plate through the connecting groove 203.

[0036] In this embodiment, one end of the connecting groove 203 intersects with the outer contour line of the piston 3, and the other end connects the exhaust port 202 of the intake plate with the ventilation groove 201. Under the action of pressure difference, the high-pressure gas near the inner wall of the cylinder is provided with a new exhaust path by the connecting groove 203, avoiding the gas from being discharged only through the narrow channel formed by the extremely small straight-line distance between the piston 3 and the exhaust port of the valve seat 5, thereby reducing exhaust resistance. When the piston 3 is close to the top dead center position, without the connecting groove 203, the exhaust resistance of the high-pressure gas in the cylinder will become increasingly larger, and the gas pressure will become increasingly higher, resulting in overcompression. This would lead to increased power consumption and reduced cooling capacity of the compressor. However, the setting of the connecting groove 203 allows the high-pressure gas near the inner wall of the cylinder to be discharged through the connecting groove 203 in advance, reducing the pressure of the high-pressure gas in the cylinder and reducing overcompression. This helps to balance the pressure distribution in the cylinder, preventing the gas pressure from rising excessively, thereby reducing the power consumption of the compressor and improving its energy efficiency. The presence of the connecting groove 203 allows the high-pressure gas near the inner wall of the cylinder to be discharged more quickly. During the movement of the piston 3, the gas enters the connecting groove 203 from the gap between the outer contour line of the piston 3 and the inner wall of the compression chamber 101, and then is discharged through the exhaust port 202 of the intake plate. This process reduces the residence time of the gas in the cylinder, improves the exhaust efficiency, and enables the compressor to discharge more gas in the same amount of time, thereby improving its overall working efficiency.

[0037] In this embodiment, the connecting groove 203 allows high-pressure gas near the inner wall of the cylinder to be discharged in advance, reducing the pressure of the high-pressure gas inside the cylinder. Simultaneously, the venting groove 201 surrounds the outer contour of the intake valve plate 4, providing a wider flow space for the gas and further balancing the pressure distribution inside the cylinder. The synergistic effect of the intake valve plate exhaust port 202 and the venting groove 201 makes the pressure distribution inside the cylinder more uniform, reducing the formation of local high-pressure areas. The connection method between the connecting groove 203 and the intake valve plate exhaust port 202 and the venting groove 201 disperses the pressure of the high-pressure gas near the inner wall of the cylinder on the cylinder wall. Through the connecting groove 203, the gas can be evenly distributed to the intake valve plate exhaust port 202 and the venting groove 201, reducing the high-pressure impact on local areas of the cylinder wall and reducing stress concentration on the cylinder wall.

[0038] See also Figures 1 to 4 As shown, with the end face of the suction plate 2 as the projection plane, the ventilation groove 201 intersects with the outer circle contour line of the piston 3 or the ventilation groove 201 is located in the outer circle contour line of the piston 3.

[0039] Specifically, depending on the different configurations of the intake valve plate 4, one configuration involves the venting groove 201 intersecting with the outer contour line of the piston 3. Under the influence of pressure difference, the high-pressure gas near the inner wall of the cylinder will leak out from the gap between the outer contour line of the piston 3 and the inner wall of the compression chamber 101, and flow directly into the venting groove 201. Another configuration involves the venting groove 201 being located within the outer contour line of the piston 3. While the venting groove 201 and the outer contour line of the piston 3 do not intersect, the connecting groove 203 still ensures that the gas between the outer contour line of the piston and the inner wall of the compression chamber 101 can flow into the intake valve plate exhaust port 202. In both cases, the gas adhering to the inner wall of the compression chamber 101 can be guided to one end of the connecting groove 203 (where it intersects with the outer contour line of the piston 3). After entering the connecting groove 203, the gas flows along the inner wall of the connecting groove 203 to the other end. The other end of the connecting groove 203 connects the intake plate exhaust hole 202 with the ventilation groove 201. When the gas reaches the other end of the connecting groove 203, it will flow into the intake plate exhaust hole 202. At the same time, the gas in the ventilation groove 201 will also flow into the intake plate exhaust hole 202 through the connecting groove 203.

[0040] In this embodiment, whether the vent groove 201 intersects with the outer contour line of the piston 3 or is located within the outer contour line of the piston 3, the high-pressure gas near the inner wall of the cylinder can leak out from the gap between the outer contour line of the piston 3 and the inner wall of the compression chamber 101 under the action of pressure difference and enter the corresponding channel. In the first structure, the gas flows directly into the vent groove 201; in the second structure, the gas flows into the exhaust port 202 of the suction plate through the connecting groove 203. Both methods provide an additional exhaust path for the high-pressure gas near the inner wall of the cylinder, allowing the gas to be discharged from the cylinder more quickly, reducing the residence time of the gas in the cylinder, improving the exhaust efficiency of the compressor, and enabling it to discharge more gas in the same amount of time, thereby improving the overall working efficiency and cooling or heating capacity of the compressor. When piston 3 approaches top dead center, the exhaust direction of the high-pressure gas in the cylinder changes, running parallel to the piston 3 end face from the cylinder wall towards the intake plate exhaust port 202 and the valve seat exhaust port 501. At this time, the high-pressure gas near the cylinder wall is discharged through the paths provided by the two structures mentioned above, avoiding the narrow channel formed by the extremely small straight-line distance between piston 3 and valve seat 5 exhaust port. This greatly increases the exhaust flow area, reduces exhaust resistance, reduces the pressure rise of the high-pressure gas in the cylinder, alleviates over-compression, and thus reduces the power consumption of the compressor and improves its energy efficiency. These two structures disperse the pressure of the high-pressure gas near the cylinder wall on the cylinder wall. The gas is evenly distributed to the intake plate exhaust port 202 through the corresponding channels, reducing the high-pressure impact on local areas of the cylinder wall, reducing stress concentration on the cylinder wall, improving the structural reliability of the cylinder, extending the service life of the compressor, and reducing the probability of failures such as cylinder wall damage caused by excessive local stress.

[0041] It is worth noting that, based on the positional relationship between the intake valve plate 4 and the vent groove 201 and the outer contour line of the piston 3, there are at least four implementation methods. Among them, three implementation methods are in which the vent groove 201 intersects with the outer contour line of the piston 3, and another implementation method is in which the vent groove 201 is located in the outer contour line of the piston 3.

[0042] See also Figures 1 to 4 As shown, with the end face of the suction plate 2 as the projection plane, the ventilation groove 201 intersects with the outer circle contour line of the piston 3. The connecting groove 203 includes a first groove segment 231 and a second groove segment 232. One end of the first groove segment 231 intersects with the outer circle contour line of the piston 3, and the other end of the first groove segment 231 is connected to the exhaust hole 202 of the suction plate. One end of the second groove segment 232 is connected to the exhaust hole 202 of the suction plate, and the other end of the second groove segment 232 is connected to the ventilation groove 201.

[0043] Specifically, under the influence of pressure difference, the high-pressure gas near the inner wall of the cylinder leaks out from the gap between the outer contour of the piston 3 and the inner wall of the compression chamber 101, and flows directly into the first section 231 of the connecting groove 203. After entering the first section 231, the gas flows along the inner wall of the first section 231 to the other end. When the gas reaches the other end of the first section 231, it flows into the intake plate exhaust port 202. At the same time, one end of the second section 232 is connected to the intake plate exhaust port 202, and the other end is connected to the ventilation groove 201. The gas in the ventilation groove 201 also flows into the intake plate exhaust port 202 through the second section 232. Through the intake plate exhaust port 202, the gas is finally discharged from the cylinder and enters the exhaust system.

[0044] In this embodiment, the first groove segment 231 and the second groove segment 232 provide multiple exhaust paths for the high-pressure gas near the inner wall of the cylinder. Gas can leak from the gap between the outer contour of the piston 3 and the inner wall of the compression chamber 101, directly entering the intake plate exhaust port 202 through the first groove segment 231. Alternatively, it can enter the venting groove 201 through the second groove segment 232 and then converge into the intake plate exhaust port 202. This increases the exhaust flow area, allowing the gas to exit the cylinder more quickly and improving exhaust efficiency. This design reduces the residence time of gas in the cylinder, preventing excessive gas accumulation and enabling the compressor to discharge more gas in the same amount of time, thereby improving the compressor's working efficiency and overall performance. By setting the first groove segment 231 and the second groove segment 232, the overall flow area of ​​the venting groove 201 is increased, reducing the resistance to gas flow. Compared to a single venting groove 201, this multi-segment design results in less resistance to gas during exhaust, helping to reduce energy loss. The arrangement of the first groove section 231 and the second groove section 232 allows the high-pressure gas near the inner wall of the cylinder to be evenly distributed to the exhaust port 202 of the intake plate, avoiding excessive pressure in local areas. This helps to balance the pressure distribution in the cylinder, reduce the impact of local high pressure on the cylinder wall and piston 3, and improve the stability and reliability of the compressor. By discharging the high-pressure gas near the inner wall of the cylinder in advance, the pressure of the gas in the cylinder is reduced, thereby reducing over-compression. This not only reduces the power consumption of the compressor, but also increases its cooling or heating capacity and improves the operating performance of the compressor.

[0045] See also Figure 3As shown, in the first specific embodiment, the venting groove 201 intersects with the outer contour line of the piston 3, the exhaust hole 202 of the intake plate is located on the radial outer side of the intake valve plate 4, the venting groove 201 includes a head groove 211, a middle groove 212 and a tail groove 213. With the end face of the intake plate 2 as the projection plane, both the head groove 211 and the tail groove 213 intersect with the outer contour line of the piston 3. One end of the second groove segment 232 is connected to the exhaust hole 202 of the intake plate, and the other end of the second groove segment 232 is connected to the middle groove 212.

[0046] Specifically, the exhaust direction of the high-pressure gas in the cylinder changes, running parallel to the end face of piston 3 from the cylinder wall towards the intake plate exhaust port 202 and the valve seat exhaust port 501. Under the action of pressure difference, the high-pressure gas near the inner wall of the cylinder leaks out from the gap between the outer contour line of piston 3 and the inner wall of compression chamber 101. Both the head groove 211 and the tail groove 213 intersect with the outer contour line of piston 3, and the leaked high-pressure gas flows directly into the head groove 211 and the tail groove 213. The middle groove 212 serves as the confluence point of the head groove 211 and the tail groove 213, where the gas gathers. The middle groove 212 is connected to the second groove section 232, and the gas flows from the middle groove 212 into the second groove section 232, and then through the second groove section 232 into the intake plate exhaust port 202. During this process, the gas leaks out from the gap between the outer contour of piston 3 and the inner wall of compression chamber 101, and also flows directly into the first section 231 of venting groove 201. After entering the first section 231, the gas flows along the inner wall of the first section 231 to the other end. When the gas reaches the other end of the first section 231, it flows into the intake plate exhaust port 202. Finally, the gas from both paths is discharged from the cylinder through the intake plate exhaust port 202 and enters the exhaust system.

[0047] In this embodiment, the middle groove 212 serves as the confluence point of the head groove 211 and the tail groove 213, collecting the high-pressure gas leaking from the gap between the outer contour of the piston 3 and the inner wall of the compression chamber 101. This concentrates the gas leaking from different locations, preventing it from dispersing within the cylinder, improving exhaust efficiency, and ensuring that the gas flows smoothly from the cylinder wall to the intake plate exhaust port 202, reducing gas retention within the cylinder and improving exhaust integrity. The middle groove 212 is connected to the second groove section 232, providing a clear flow path for the gas. This allows the collected gas to flow smoothly from the middle groove 212 into the second groove section 232, and then through the second groove section 232 into the intake plate exhaust port 202, ensuring that the gas exits the cylinder along a predetermined path, preventing gas leakage or incorrect flow direction, and ensuring the smooth progress of the exhaust process. The connection between the middle groove 212 and the second groove 232 provides a larger flow area and a shorter flow path for the gas, reduces the resistance to gas flow, and allows the gas to be discharged from the cylinder more quickly. The connection between the middle groove 212 and the second groove 232 helps to discharge the high-pressure gas near the inner wall of the cylinder in a timely manner, reduce the pressure of the gas in the cylinder, and thus reduce overcompression.

[0048] In this embodiment, the first groove section 231 provides a direct exhaust path for the high-pressure gas near the inner wall of the cylinder. After leaking out from the gap between the outer contour of the piston 3 and the inner wall of the compression chamber 101, the gas directly enters the first groove section 231 and flows into the intake plate exhaust port 202. The middle groove 212 is connected to the second groove section 232, collecting the gas flowing in from the head groove 211 and the tail groove 213, and guiding the gas to the intake plate exhaust port 202 through the second groove section 232. This multi-path arrangement increases the exhaust flow area, allowing the gas to exit the cylinder more quickly and smoothly, thereby significantly improving exhaust efficiency. Through these two exhaust paths, the high-pressure gas near the inner wall of the cylinder can be discharged in time, reducing the residence time of the gas in the cylinder, avoiding the accumulation of gas in local areas, and improving the working efficiency of the compressor. The synergistic effect of the first groove section 231 and the middle groove 212 with the second groove section 232 helps optimize the pressure distribution within the cylinder. Gas is discharged through multiple paths, avoiding the formation of local high-pressure areas and making the pressure within the cylinder more uniform. This uniform pressure distribution helps reduce stress concentration on the cylinder wall and piston 3, improving the structural reliability of the compressor. The multi-path exhaust configuration increases the exhaust flow area, reduces gas flow resistance, and allows gas to exit the cylinder more easily. This helps reduce the compressor's power consumption and improve its energy efficiency.

[0049] See also Figure 3As shown, air intake valve plate 4 is provided with air intake plate exhaust holes 202 on both sides, and one end of the second groove section 232 is connected to the air intake plate exhaust holes 202, and the other end of the second groove section 232 is connected to the middle groove 212.

[0050] In this embodiment, the intake plate exhaust holes 202 on both sides of the intake valve plate 4 provide multiple exhaust paths for the gas. The gas flows from the central groove 212 through the second groove section 232 into the intake plate exhaust holes 202, and then exits from both sides. This increases the exhaust flow area, allowing the gas to exit the cylinder more quickly and smoothly, thereby significantly improving exhaust efficiency. The multi-path exhaust setting reduces the residence time of gas in the cylinder, avoids gas accumulation in local areas, and improves the working efficiency of the compressor. The arrangement of the intake plate exhaust holes 202 and the second groove section 232 on both sides of the intake valve plate 4 helps to optimize the pressure distribution in the cylinder. The gas exits through multiple paths, avoiding the formation of local high-pressure areas and making the pressure in the cylinder more uniform. This uniform pressure distribution helps to reduce stress concentration on the cylinder wall and piston 3, improving the structural reliability of the compressor.

[0051] See also Figure 4 As shown, in the second specific embodiment, the venting groove 201 intersects with the outer contour line of the piston 3. Two suction valves 4 are provided on the suction plate 2, arranged side-by-side. The suction plate 2 has a first venting groove and a second venting groove respectively formed around the outer contour of the two suction valves 4. Both the first and second venting grooves intersect with the outer contour line of the piston 3. The connecting groove 203 includes a first groove segment 231, a second groove segment 232, and a third groove segment 233. One end of the first groove segment 231 intersects with the outer contour line of the piston 3, and the other end of the first groove segment 231 communicates with the exhaust hole 202 of the suction plate. Both ends of the second groove segment 232 communicate with the first and second venting grooves respectively. One end of the third groove segment 233 communicates with the second groove segment 232, and the other end of the third groove segment 233 communicates with the exhaust hole 202 of the suction plate.

[0052] Specifically, in this embodiment, one end of the first groove segment 231 intersects with the outer contour line of the piston 3, and the other end is connected to the intake plate exhaust port 202. After the gas leaks out from the gap between the outer contour line of the piston 3 and the inner wall of the compression chamber 101, it enters the first groove segment 231, flows along the inner wall of the groove segment to the other end, and directly enters the intake plate exhaust port 202. Under the action of pressure difference, the high-pressure gas near the inner wall of the cylinder will leak out from the gap between the outer contour line of the piston 3 and the inner wall of the compression chamber 101. The leaked high-pressure gas flows directly into the first vent groove and the second vent groove. The first vent groove and the second vent groove collect the high-pressure gas leaking from the cylinder wall and guide the gas flow. The gas flows in the first vent groove and the second vent groove. The two ends of the second groove segment 232 are connected to the first vent groove and the second vent groove respectively. The gas flows into the second groove segment 232 from the first vent groove and the second vent groove. One end of the third groove 233 is connected to the second groove 232, and the other end is connected to the intake plate exhaust port 202. Gas flows from the second groove 232 into the third groove 233 and finally enters the intake plate exhaust port 202. Through the above path, the gas is finally discharged from the cylinder through the intake plate exhaust port 202 and enters the exhaust system.

[0053] In this embodiment, the first groove segment 231, the second groove segment 232, and the third groove segment 233 together provide multiple exhaust paths for the high-pressure gas near the inner wall of the cylinder. The gas can leak out from the gap between the outer contour of the piston 3 and the inner wall of the compression chamber 101, and directly enter the intake plate exhaust port 202 through the first groove segment 231. Alternatively, it can flow into the intake plate exhaust port 202 from the first venting groove and the second venting groove through the second groove segment 232 and the third groove segment 233. This multi-path arrangement significantly increases the exhaust flow area, allowing the gas to exit the cylinder more quickly and smoothly, thereby improving exhaust efficiency. Multi-path exhaust reduces the residence time of gas in the cylinder, avoids gas accumulation in local areas, and improves the working efficiency of the compressor. Even if one exhaust path is blocked by impurities or local damage, the other paths can still continue to exhaust, ensuring the normal operation of the compressor. The multi-segment arrangement of the connecting groove 203 provides a smooth transition path for the gas, allowing the gas to enter the intake plate exhaust port 202 evenly and finally exit the cylinder. This helps optimize airflow organization, reduce eddies and backflow phenomena, and the multi-segment arrangement of the connecting groove 203 disperses the pressure impact of gas on the cylinder wall and intake vane exhaust port 202, reducing stress concentration in local areas, thereby improving the structural reliability of the cylinder and intake vane 2.

[0054] In this embodiment, the first and second venting grooves are respectively opened around the outer contours of the two intake valve plates 4, which can widely collect high-pressure gas near the inner wall of the cylinder. This ensures that after the gas leaks out from the gap between the outer contour of the piston 3 and the inner wall of the compression chamber 101 under the action of pressure difference, it is quickly guided into the corresponding venting groove 201. The connecting groove 203 guides the gas from various positions to the exhaust port 202 of the intake plate through its different groove sections, so that the gas can be smoothly discharged from the cylinder according to a predetermined path. The combination of the first and second venting grooves with multiple groove sections of the connecting groove 203 provides multiple exhaust paths for the gas. The gas can be discharged directly through the first groove section 231, or it can be discharged from the venting groove 201 through the second groove section 232 and the third groove section 233, which increases the exhaust flow area. The multiple exhaust paths work together to reduce the resistance of gas flow, so that the gas can be discharged from the cylinder more easily, reducing the impact of exhaust resistance on the compressor performance.

[0055] See also Figure 4 As shown, the exhaust port 202 of the intake plate is opened between the two intake valve plates 4. The first and second venting grooves each include a head groove 211, a middle groove 212, and a tail groove 213. With the end face of the intake plate 2 as the projection plane, the head groove 211 and tail groove 213 of the first and second venting grooves intersect with the outer contour line of the piston 3. The middle grooves 212 of the first and second venting grooves are arranged adjacent to each other on the inner side. The two ends of the second groove segment 232 are respectively connected to the middle grooves 212 of the first and second venting grooves. Specifically, the first groove segment 231 and the second groove segment 232 are arranged in a T-shape.

[0056] Specifically, under the action of pressure difference, the high-pressure gas near the inner wall of the cylinder will leak out from the gap between the outer contour of the piston 3 and the inner wall of the compression chamber 101. Since the head groove 211 and the tail groove 213 intersect with the outer contour of the piston 3, the leaked high-pressure gas flows directly into the head groove 211 and the tail groove 213 of the first vent groove and the second vent groove. The head groove 211 and the tail groove 213 collect the high-pressure gas leaking from near the cylinder wall and guide the gas to flow towards the middle groove 212. The gas flows in the head groove 211 and the tail groove 213 and finally merges into the middle groove 212. The middle channel 212 serves as the confluence point of the head channel 211 and the tail channel 213, gathering the gas. The middle channels 212 of the first and second venting channels are adjacent to each other, allowing the gas to concentrate in the middle channel 212 area. The two ends of the second channel segment 232 are connected to the middle channels 212 of the first and second venting channels, respectively. Gas flows from the middle channels 212 of the first and second venting channels into the second channel segment 232, and then flows towards the intake plate exhaust port 202. One end of the third channel segment 233 is connected to the second channel segment 232, and the other end is connected to the intake plate exhaust port 202. Gas flows from the second channel segment 232 into the third channel segment 233, and finally enters the intake plate exhaust port 202. Through the intake plate exhaust port 202, the gas is finally discharged from the cylinder and enters the exhaust system.

[0057] In this embodiment, the head groove 211 and tail groove 213 of the first vent groove and the second vent groove intersect with the outer contour line of the piston 3, which can widely collect the high-pressure gas leaking from the gap between the outer contour line of the piston 3 and the inner wall of the compression chamber 101. This arrangement ensures that the gas leaking from different positions during the movement of the piston 3 can be effectively captured and enter the vent groove 201 system. The middle groove 212 of the first vent groove and the second vent groove are arranged adjacent to each other, so that the two vent grooves 201 can fit more closely, further improving the efficiency of gas collection and avoiding the retention of gas in the cylinder. The first and second vent slots are connected to the second vent segment 232, which in turn is connected to the third vent segment 233 and the exhaust port 202 of the intake plate. At the same time, the first vent segment 231 is also connected to the exhaust port 202 of the intake plate. This multi-path arrangement significantly increases the exhaust flow area, allowing the gas to be discharged from the cylinder more quickly and smoothly. The multi-path exhaust arrangement reduces the resistance to gas flow, allowing the gas to be discharged from the cylinder more easily, reducing the impact of exhaust resistance on compressor performance, and improving exhaust efficiency.

[0058] In one specific implementation, the tails of the two intake valve plates 4 are not separated, but connected together. One side of the tail of the ventilation groove 201 corresponding to the two intake valve plates 4 intersects with the outer circle contour line of the piston 3, while the other side, that is, the adjacent side of the groove, terminates at the middle groove 212. The intake plate exhaust hole 202 is opened between the two intake valve plates 4, that is, the intake plate exhaust hole 202 is set at the connection of the tails of the two intake valve plates 4, and the intake plate exhaust hole 202 is also located in the outer circle contour line of the piston 3.

[0059] See also Figure 5 As shown, in the third specific embodiment, when the venting groove 201 intersects with the outer contour line of the piston 3, two venting valves 4 are provided on the suction plate 2. The two venting valves 4 are arranged side by side, and the suction plate 2 has a first venting groove and a second venting groove respectively around the outer contour of the two venting valves 4. Taking the end face of the suction plate 2 as the projection plane, both the first venting groove and the second venting groove intersect with the outer contour line of the piston 3. The first venting groove and the second venting groove are respectively connected to the exhaust hole 202 of the suction plate. The other end of the connecting groove 203 connects the exhaust hole 202 of the suction plate with the venting groove 201, so that the gas near the inner wall of the compression chamber 101 is discharged from the exhaust port.

[0060] Specifically, under the influence of pressure difference, the high-pressure gas near the inner wall of the cylinder leaks out from the gap between the outer contour of the piston 3 and the inner wall of the compression chamber 101. Since both the first and second vent grooves intersect the outer contour of the piston 3, the leaked high-pressure gas flows directly into the first and second vent grooves. Because the first and second vent grooves are respectively connected to the intake plate exhaust port 202, the gas in the first vent groove flows along the groove and eventually enters the intake plate exhaust port 202. Similarly, the gas in the second vent groove flows along the groove and eventually enters the intake plate exhaust port 202. Through the intake plate exhaust port 202, the gas is finally discharged from the cylinder and enters the exhaust system.

[0061] In this embodiment, the connecting groove 203 provides a direct exhaust path for the high-pressure gas near the inner wall of the cylinder. After leaking from the gap between the outer contour of the piston 3 and the inner wall of the compression chamber 101, the gas enters the connecting groove 203, flows along the inner wall of the groove section to the other end, and directly enters the intake plate exhaust port 202. Simultaneously, the first venting groove and the second venting groove collect the high-pressure gas leaking from the gap between the outer contour of the piston 3 and the inner wall of the compression chamber 101, and guide the gas into the intake plate exhaust port 202. This multi-path arrangement significantly increases the exhaust flow area, allowing the gas to exit the cylinder more quickly and smoothly, thereby improving exhaust efficiency. The first venting groove and the second venting groove are respectively connected to the intake plate exhaust port 202, providing multiple exhaust paths for the gas. The gas can flow into the intake plate exhaust port 202 from different venting grooves 201, increasing the exhaust flow area and allowing the gas to exit the cylinder more quickly and smoothly, thereby improving exhaust efficiency.

[0062] It is worth noting that in the third embodiment, one end of the connecting groove 203 intersects with the outer contour line of the piston 3, and the other end of the connecting groove 203 connects the exhaust hole 202 of the suction plate with the ventilation groove 201. This connection means that the connecting groove 203, the exhaust hole 202 of the suction plate and the ventilation groove 201 are interconnected and have an intersection point.

[0063] See also Figure 5 As shown, the intake plate exhaust port 202 is opened between the two intake valve plates 4. The first and second ventilation grooves each include a head groove 211, a middle groove 212, and a tail groove 213. With the end face of the intake plate 2 as the projection plane, the head groove 211 and tail groove 213 of the first and second ventilation grooves intersect with the outer circle contour line of the piston 3. The inner side of the middle groove 212 of the first and second ventilation grooves is connected to the intake plate exhaust port 202. When a valve seat 5 is also included, the intake plate 2 is installed between the valve seat 5 and the cylinder body 1. The valve seat 5 is provided with a valve seat exhaust port 501. The intake plate exhaust port 202 and the valve seat exhaust port 501 are coaxially arranged and connected to the valve seat exhaust port 501.

[0064] Specifically, since the head groove 211 and tail groove 213 of the first and second vent grooves intersect with the outer contour line of the piston 3, the leaked high-pressure gas flows directly into the first and second vent grooves. The head groove 211 and tail groove 213 collect the high-pressure gas leaking from near the cylinder wall and guide the gas to flow towards the middle groove 212. The gas flows in the head groove 211 and tail groove 213 and finally merges into the middle groove 212. The middle groove 212 serves as the confluence point of the head groove 211 and tail groove 213, gathering the gas. The inner side of the middle groove 212 of the first and second vent grooves is connected to the intake plate exhaust hole 202, and the gas flows from the middle groove 212 into the intake plate exhaust hole 202. One end of the connecting groove 203 intersects with the outer contour line of the piston 3, and the other end connects the intake plate exhaust port 202 with the ventilation groove 201. After the gas leaks out from the gap between the outer contour line of the piston 3 and the inner wall of the compression chamber 101, it enters the connecting groove 203, flows along the inner wall of the groove section to the other end, and finally enters the intake plate exhaust port 202. The gas enters the intake plate exhaust port 202 through the connecting groove 203, and merges with the gas discharged through the first ventilation groove and the second ventilation groove into the intake plate exhaust port 202.

[0065] In this embodiment, the first vent groove and the second vent groove respectively collect the high-pressure gas leaking from the gap between the outer contour of the piston 3 and the inner wall of the compression chamber 101, and guide the gas into the intake plate exhaust port 202. The connecting groove 203 further provides an exhaust path, allowing the gas to directly enter the intake plate exhaust port 202 from near the outer contour of the piston 3. This multi-path setting significantly increases the exhaust flow area, allowing the gas to exit the cylinder more quickly and smoothly, thereby improving exhaust efficiency. Compared to the second embodiment, the third embodiment has the intake plate exhaust port 202 and the valve seat exhaust port 501 coaxially arranged and connected, further optimizing the exhaust path, ensuring that the gas can smoothly exit the cylinder and enter the exhaust system, improving the stability and reliability of exhaust, further clarifying the position of the intake plate exhaust port 202, and introducing the synergistic effect of the valve seat 5, making the exhaust path more optimized and the exhaust process more stable and reliable.

[0066] As a specific implementation, since the inner side of the middle groove 212 of the first vent groove and the second vent groove are respectively connected to the exhaust hole 202 of the air intake plate, from the overall perspective, there is a large groove area in the air intake plate 2, so that the exhaust hole 202 of the air intake plate and the exhaust hole 501 of the valve seat are coaxially arranged.

[0067] See also Figure 6As shown, in the fourth specific embodiment, when the venting groove 201 is located within the outer contour line of the piston 3, with the end face of the suction plate 2 as the projection plane, the venting groove 201 is located within the outer contour line of the piston 3. The venting groove 201 includes a head groove 211, a middle groove 212, and a tail groove 213. The connecting groove 203 includes a first groove segment 231, a second groove segment 232, a third groove segment 233, and a fourth groove segment 235. One end of the first groove segment 231 is connected to the outer contour line of the piston 3. The first groove segment 231 is connected to the head groove 211 at one end; the second groove segment 232 is connected to the outer contour line of the piston 3 at one end and to the tail groove 213 at the other end; the third groove segment 233 is connected to the exhaust port 202 of the intake plate at one end and to the middle groove 212 at the other end; the fourth groove segment 235 is connected to the outer contour line of the piston 3 at one end and to the exhaust port 202 of the intake plate at the other end.

[0068] Specifically, since the venting groove 201 is located within the outer contour of the piston 3, the gas between the outer contour of the piston 3 and the inner wall of the compression chamber 101 does not flow directly into the venting groove 201, but gas will still be present in the venting groove 201. One end of the first groove segment 231 intersects with the outer contour of the piston 3, and the other end is connected to the head groove 211 of the venting groove 201. After the gas leaks out from the gap between the outer contour of the piston 3 and the inner wall of the compression chamber 101, it enters the first groove segment 231, flows along the inner wall of the groove segment to the other end, and finally enters the head groove 211. One end of the second groove segment 232 intersects with the outer contour of the piston 3, and the other end is connected to the tail groove 213 of the venting groove 201. After the gas leaks out from the gap between the outer contour of the piston 3 and the inner wall of the compression chamber 101, it enters the second groove segment 232, flows along the inner wall of the groove segment to the other end, and finally enters the tail groove 213. One end of the third groove 233 is connected to the intake plate exhaust port 202, and the other end is connected to the middle groove 212 of the ventilation groove 201. Gas flows into the third groove 233 from the middle groove 212. Gas in the head groove 211 and the tail groove 213 also enters the intake plate exhaust port 202 through the middle groove 212. Gas enters the intake plate exhaust port 202 through the third groove 233 and is finally discharged from the cylinder and enters the exhaust system.

[0069] In this embodiment, one end of the first groove segment 231 intersects with the outer contour line of the piston 3, and the other end is connected to the head groove 211. After the gas leaks out from the gap between the outer contour line of the piston 3 and the inner wall of the compression chamber 101, it enters the first groove segment 231, flows along the inner wall of the groove segment to the other end, and finally enters the head groove 211. The head groove 211 collects the gas flowing in from the first groove segment 231 and guides the gas to flow towards the middle groove 212. One end of the second groove segment 232 intersects with the outer contour line of the piston 3, and the other end is connected to the tail groove 213. After the gas leaks out from the gap between the outer contour line of the piston 3 and the inner wall of the compression chamber 101, it enters the second groove segment 232, flows along the inner wall of the groove segment to the other end, and finally enters the tail groove 213. The tail groove 213 collects the gas flowing in from the second groove segment 232 and guides the gas to flow towards the middle groove 212. The middle groove 212 serves as the confluence point of the head groove 211 and the tail groove 213, collecting and converging the gas flowing in from both grooves. One end of the third groove section 233 is connected to the intake plate exhaust port 202, and the other end is connected to the middle groove 212. Gas flows from the middle groove 212 into the third groove section 233 and finally enters the intake plate exhaust port 202. This arrangement ensures that the gas can enter the intake plate exhaust port 202 evenly, optimizing the pressure distribution within the cylinder and preventing the formation of localized high-pressure areas. The connection between the first groove section 231, the second groove section 232, and the third groove section 233 and the head groove 211, the middle groove 212, and the tail groove 213 provides multiple exhaust paths for the gas. The gas can enter the head groove 211 through the first groove section 231, enter the tail groove 213 through the second groove section 232, and finally enter the exhaust port 202 of the intake plate through the middle groove 212 and the third groove section 233. This multi-path setting increases the exhaust flow area, reduces exhaust resistance, and improves exhaust efficiency.

[0070] See also Figure 6As shown, the suction plate 2 is provided with two suction valve plates 4, which are arranged side by side. The suction plate 2 has a first ventilation groove and a second ventilation groove respectively around the outer contour of the two suction valve plates 4. The first ventilation groove and the second ventilation groove each include a head groove 211, a middle groove 212 and a tail groove 213. The connecting groove 203 includes a first groove segment 231, a second groove segment 232 and a third groove segment 233. One end of the first groove segment 231 intersects with the outer contour line of the piston 3. The other end is connected to the head groove 211; one end of the second groove segment 232 intersects the outer contour line of the piston 3, and the other end of the second groove segment 232 is connected to the tail groove 213; wherein, the third groove segment 233 includes a first groove 241 and a second groove 242, the two ends of the first groove 241 are connected to the middle groove 212 of the first vent groove and the second vent groove respectively, one end of the second groove 242 is connected to the first groove 241, and the other end of the second groove 242 is connected to the exhaust hole 202 of the intake plate. Specifically, the first groove 241 and the second groove 242 are arranged in a T-shape.

[0071] Specifically, the two ends of the first trough 241 are connected to the middle trough 212 of the first and second venting troughs, respectively. Gas flows into the first trough 241 from the middle trough 212 of the first and second venting troughs. One end of the second trough 242 is connected to the first trough 241, and the other end is connected to the exhaust port 202 of the suction plate. Gas flows into the second trough 242 from the first trough 241 and finally enters the exhaust port 202 of the suction plate.

[0072] In this embodiment, the two ends of the first groove 241 are connected to the middle groove 212 of the first vent groove and the second vent groove, respectively. This allows the gas in the two vent grooves 201 to be collected and guided to flow to the second groove 242. This arrangement allows the gas to flow from the vent groove 201 to the exhaust port 202 of the intake plate more quickly, reducing the residence time of the gas in the cylinder and improving the exhaust efficiency. One end of the second groove 242 is connected to the first groove 241, and the other end is connected to the exhaust port 202 of the intake plate, providing a direct path for the gas to the exhaust port. This shortens the gas flow path, reduces the resistance to gas flow, and allows the gas to be discharged from the cylinder more smoothly. The first groove section 231 and the second groove section 232 are connected to the head groove 211 and the tail groove 213 respectively, guiding the gas to the middle groove 212. The first groove 241 of the third groove section 233 gathers the gas from the two ventilation grooves 201, while the second groove 242 directly guides the gas to the exhaust hole 202 of the intake plate. The multi-path setting increases the exhaust flow area, reduces exhaust resistance, and improves exhaust efficiency.

[0073] In one specific implementation, the tails of the two intake valve plates 4 are not separated, but connected together. One side of the tail of the ventilation groove 201 corresponding to the two intake valve plates 4 intersects with the outer circle contour line of the piston 3, while the other side, that is, the adjacent side of the groove, terminates at the middle groove 212. The intake plate exhaust hole 202 is opened between the two intake valve plates 4, that is, the intake plate exhaust hole 202 is set at the connection of the tails of the two intake valve plates 4, and the intake plate exhaust hole 202 is also located in the outer circle contour line of the piston 3.

[0074] As a specific implementation, the connecting groove 203 is formed on the suction plate 2 in the form of a recessed groove. The total projected area of ​​the connecting groove 201 and the venting groove 203 on the valve plate surface is S1, the thickness of the suction plate 2 is a, and the displacement of the piston compressor is S2. It is necessary to satisfy a*S1≤S2 / 10. If the volume of the venting groove 203 is too large, it will increase the compression power consumption of the compressor.

[0075] It is worth noting that the first embodiment is a basic multi-path exhaust setting, where the vent groove 201 intersects with the outer contour line of the piston 3, providing multiple exhaust paths, optimizing pressure distribution, improving airflow organization, and enhancing structural reliability. The second embodiment, based on the first embodiment, adds two parallel intake valve plates 4 and corresponding vent grooves 201, further optimizing the exhaust paths and improving exhaust efficiency. The third embodiment, based on the second embodiment, clarifies the position of the intake plate exhaust hole 202 and introduces the synergistic effect of the valve seat 5, further optimizing the exhaust paths and improving exhaust stability and reliability. The fourth embodiment has the vent groove 201 located within the outer contour line of the piston 3, providing different exhaust path options and enhancing exhaust flexibility and reliability. All four embodiments improve the performance and energy efficiency of the compressor by setting up multi-path exhaust, optimizing pressure distribution, improving airflow organization and enhancing structural reliability. The specific implementation methods differ in the number of intake valve plates 4, the position of intake plate exhaust holes 202, the setting of ventilation grooves 201 and connecting grooves 203, and the use of valve seats 5, each with its own emphasis to adapt to different setting requirements and operating conditions.

[0076] All four embodiments improve compressor performance and energy efficiency through multi-path exhaust settings, optimized pressure distribution, improved airflow organization, and enhanced structural reliability. They differ in the number of intake valve plates 4, the location of intake plate exhaust holes 202, the arrangement of ventilation slots 201 and connecting slots 203, and the use of valve seats 5, each with its own emphasis to adapt to different setup requirements and operating conditions.

[0077] A compressor includes a pump body assembly, the pump body assembly being the pump body assembly described above.

[0078] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0079] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A pump body assembly, characterized in that, include: Cylinder body (1), intake plate (2), and piston (3); The cylinder body (1) has a compression chamber (101) and the piston (3) reciprocates in the compression chamber (101); the suction plate (2) is installed on the cylinder body (1) and covers the compression chamber (101); the suction plate (2) is provided with a suction valve plate (4) and the suction plate (2) has a ventilation groove (201) around the outer contour of the suction valve plate (4); The suction plate (2) is also provided with a suction plate exhaust hole (202) and a connecting groove (203). With the end face of the suction plate (2) as the projection plane, one end of the connecting groove (203) intersects with the outer circle contour line of the piston (3), and the other end of the connecting groove (203) connects the suction plate exhaust hole (202) with the ventilation groove (201) so that the gas near the inner wall of the compression chamber (101) is discharged from the suction plate exhaust hole (202).

2. The pump body assembly according to claim 1, characterized in that, With the end face of the air intake plate (2) as the projection plane, the air groove (201) intersects with the outer circle contour line of the piston (3) or the air groove (201) is located in the outer circle contour line of the piston (3).

3. The pump body assembly according to claim 2, characterized in that, With the end face of the suction plate (2) as the projection plane, the ventilation groove (201) intersects with the outer circle contour line of the piston (3). The connecting groove (203) includes a first groove segment (231) and a second groove segment (232). One end of the first groove segment (231) intersects with the outer circle contour line of the piston (3), and the other end of the first groove segment (231) is connected to the exhaust hole (202) of the suction plate. One end of the second groove segment (232) is connected to the exhaust hole (202) of the suction plate, and the other end of the second groove segment (232) is connected to the ventilation groove (201).

4. The pump body assembly according to claim 3, characterized in that, The exhaust port (202) of the air intake plate is located on the radial outer side of the air intake valve plate (4). The ventilation groove (201) includes a head groove (211), a middle groove (212) and a tail groove (213) connected in sequence. With the end face of the air intake plate (2) as the projection plane, the head groove (211) and the tail groove (213) intersect the outer circle contour line of the piston (3). One end of the second groove segment (232) is connected to the exhaust port (202) of the air intake plate, and the other end of the second groove segment (232) is connected to the middle groove (212).

5. The pump body assembly according to claim 4, characterized in that, The suction valve plate (4) is provided with suction plate exhaust holes (202) on both sides respectively. Each suction plate exhaust hole (202) is provided with a corresponding connecting groove (203). One end of the second groove section (232) is connected to the suction plate exhaust hole (202), and the other end of the second groove section (232) is connected to the middle groove (212).

6. The pump body assembly according to claim 3, characterized in that, The suction plate (2) is provided with two suction valve plates (4), which are arranged side by side. The ventilation groove (201) includes a first ventilation groove and a second ventilation groove. The suction plate (2) is provided with a first ventilation groove and a second ventilation groove around the outer contour of the two suction valve plates (4). The connecting groove (203) includes a first groove segment (231), a second groove segment (232) and a third groove segment (233). One end of the first groove segment (231) intersects with the outer contour line of the piston (3), and the other end of the first groove segment (231) is connected to the exhaust hole (202) of the suction plate. The two ends of the second groove segment (232) are connected to the first ventilation groove and the second ventilation groove, respectively. One end of the third groove segment (233) is connected to the second groove segment (232), and the other end of the third groove segment (233) is connected to the exhaust hole (202) of the suction plate.

7. The pump body assembly according to claim 6, characterized in that, The exhaust port (202) of the air intake plate is opened between the two air intake valve plates (4). The first air intake groove and the second air intake groove each include a head groove (211), a middle groove (212) and a tail groove (213). With the end face of the air intake plate (2) as the projection plane, the head groove (211) and the tail groove (213) of the first air intake groove and the second air intake groove intersect with the outer circle contour line of the piston (3). The middle groove (212) of the first air intake groove and the second air intake groove are arranged adjacent to each other on the inner side. The two ends of the second groove segment (232) are respectively connected to the middle groove (212) of the first air intake groove and the second air intake groove.

8. The pump body assembly according to claim 2, characterized in that, The suction plate (2) is provided with two suction valve plates (4), which are arranged side by side. The suction plate (2) has a first ventilation groove and a second ventilation groove respectively around the outer contour of the two suction valve plates (4). With the end face of the suction plate (2) as the projection plane, the first ventilation groove and the second ventilation groove intersect the outer contour line of the piston (3), and the first ventilation groove and the second ventilation groove are respectively connected to the exhaust hole (202) of the suction plate.

9. The pump body assembly according to claim 8, characterized in that, The exhaust port (202) of the air intake plate is opened between the two air intake valve plates (4). The first air vent and the second air vent both include a head vent (211), a middle vent (212) and a tail vent (213). With the end face of the air intake plate (2) as the projection plane, the head vent (211) and tail vent (213) of the first air vent and the second air vent intersect with the outer circle contour line of the piston (3). The inner side of the middle vent (212) of the first air vent and the second air vent is connected to the exhaust port (202) of the air intake plate. When a valve seat (5) is also included, the suction plate (2) is installed between the valve seat (5) and the cylinder body (1). The valve seat (5) is provided with a valve seat exhaust hole (501). The suction plate exhaust hole (202) is coaxially arranged with the valve seat exhaust hole (501), and the suction plate exhaust hole (202) is connected to the valve seat exhaust hole (501).

10. The pump body assembly according to claim 2, characterized in that, With the end face of the suction plate (2) as the projection plane, the ventilation groove (201) is located in the outer circumference of the piston (3). The ventilation groove (201) includes a head groove (211), a middle groove (212), and a tail groove (213). The connecting groove (203) includes a first groove segment (231), a second groove segment (232), a third groove segment (233), and a fourth groove segment (235). One end of the first groove segment (231) intersects with the outer circumference of the piston (3), and the other end of the first groove segment (231) intersects with the head groove (211). 211) Connected; one end of the second groove segment (232) intersects with the outer circle contour line of the piston (3), and the other end of the second groove segment (232) is connected to the tail groove (213); one end of the third groove segment (233) is connected to the exhaust hole (202) of the air intake plate, and the other end of the third groove segment (233) is connected to the middle groove (212); one end of the fourth groove segment (235) intersects with the outer circle contour line of the piston (3), and the other end of the fourth groove segment (235) is connected to the exhaust hole (202) of the air intake plate.

11. The pump body assembly according to claim 10, characterized in that, The suction plate (2) is provided with two suction valve plates (4), which are arranged side by side. The suction plate (2) is provided with a first ventilation groove and a second ventilation groove around the outer contour of the two suction valve plates (4). The first ventilation groove and the second ventilation groove both include the head groove (211), the middle groove (212) and the tail groove (213). The third groove segment (233) includes a first groove (241) and a second groove (242). The two ends of the first groove (241) are respectively connected to the middle groove (212) of the first ventilation groove and the second ventilation groove. One end of the second groove (242) is connected to the first groove (241), and the other end of the second groove (242) is connected to the exhaust hole (202) of the air intake plate.

12. A compressor, comprising a pump body assembly, characterized in that, The pump assembly is the pump assembly according to any one of claims 1 to 11.

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