Air cylinder assembly and compressor

Abstract

The invention provides an air cylinder assembly and a compressor. The air cylinder assembly comprises an air cylinder body, an air suction piece and a piston. A second vent groove is formed in the air suction sheet around the outer contour of the air suction valve sheet; a first vent groove is formed in the end face, facing the air suction piece, of the piston, the end face of the piston serves as a projection plane, the contour line of the second vent groove is projected on the end face of the piston, a first exhaust port is formed in the air suction piece, and the projection contour line of the first exhaust port on the end face of the piston intersects with the first vent groove. And the first vent groove communicates the second vent groove with the first exhaust port, so that gas near the inner wall surface of the compression cavity is exhausted from the first exhaust port. The first vent groove is located in the end face of the piston and can collect high-pressure gas flowing along the inner wall of the compression cavity and guide the gas to flow towards the air suction piece, and the first vent groove and the second vent groove work cooperatively so that the gas can be exhausted out of the air cylinder in time.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of compressors, and particularly relates to a cylinder assembly and a compressor. BACKGROUND

[0002] During the operation of the piston compressor, the piston moves linearly in the cylinder, the general exhaust direction of the high-pressure gas in the cylinder is consistent with the movement direction of the piston, and is perpendicular to the piston end face and points to the valve seat exhaust port, at this time, the minimum exhaust flow area is the cross-sectional area of the valve seat exhaust port; during the process of the piston moving to the near top dead center position, the linear distance between the piston and the exhaust port is reduced to tens of microns, at this time, the general exhaust direction of the high-pressure gas in the cylinder is perpendicular to the movement direction of the piston and is parallel to the piston end face and points to the valve seat exhaust port from the cylinder wall, at this time, the minimum flow area becomes the product of the linear distance between the piston and the valve seat exhaust port and the perimeter of the valve seat exhaust port, which is much smaller than the cross-sectional area of the valve seat exhaust port, with the decrease of the linear distance between the piston and the valve seat exhaust port, the minimum exhaust flow area becomes smaller and smaller, the exhaust resistance of the high-pressure gas in the cylinder becomes larger and larger, the gas pressure becomes higher and higher, and over-compression occurs, especially at high frequency, the time required for discharging the high-pressure gas per unit volume in the cylinder is reduced, the exhaust resistance is further increased, the high pressure in the cylinder is higher, and the over-compression condition is more serious, resulting in the increase of the power consumption of the compressor and the decrease of the cooling capacity. The suction blade of the piston compressor is usually a thin plate punched part, which is punched into a valve piece shape through a punching die, and after punching, a suction valve piece cavity groove is formed, which surrounds the entire suction valve piece and is in communication with the cylinder cavity, when the piston moves to the near top dead center position, the exhaust resistance of the high-pressure gas in the cylinder cavity and the suction valve piece cavity groove is large, the power consumption is high, and the exhaust flow area is small, and the exhaust resistance increases sharply. SUMMARY

[0003] The application provides a cylinder assembly and a compressor, which can solve the technical problems of large exhaust resistance of high-pressure gas in the cylinder cavity and the suction valve piece cavity groove, high power consumption, and small exhaust flow area.

[0004] The application provides a cylinder assembly, which comprises a cylinder body, a suction blade and a piston.

[0005] A compression cavity is formed in the cylinder body, and the piston reciprocates in the compression cavity; the suction blade is installed on the cylinder body, covers the compression cavity, and is provided with a suction valve piece; a second air passage groove is formed around the outer contour of the suction valve piece.

[0006] The first air passage groove is opened in the end surface of the piston towards the suction valve plate, and the outline of the second air passage groove is projected on the end surface of the piston, one end of the first air passage groove intersects with the outline of the outer circle of the piston, and the other end of the first air passage groove intersects with the outline of the second air passage groove.

[0007] The first exhaust port is opened on the suction valve plate, the projection outline of the first exhaust port on the end surface of the piston intersects with the first air passage groove, and the first air passage groove connects the second air passage groove and the first exhaust port, so that the gas near the inner wall of the compression chamber is discharged from the first exhaust port.

[0008] In some embodiments, the outline of the second air passage groove is projected on the end surface of the piston, the first end of the outline of the second air passage groove intersects with the outline of the outer circle of the piston, and the second end of the outline of the second air passage groove extends in the radial direction of the end surface of the piston.

[0009] In some embodiments, when one suction valve plate is arranged on the suction valve plate, the first exhaust port is opened on the suction valve plate, the first air passage groove includes a first groove segment and a second groove segment, the first groove segment and the second groove segment are V-shaped, one end of the first groove segment and the second groove segment respectively intersects with the second end of the outline of the second air passage groove, and the other end of the first groove segment and the second groove segment intersects with the projection outline of the first exhaust port on the end surface of the piston.

[0010] In some embodiments, the first air passage groove further includes a third groove segment, a plurality of third groove segments are opened along the circumferential direction of the end surface of the piston, one end of the third groove segment intersects with the outline of the outer circle of the piston, and the other end of the third groove segment intersects with the second end of the outline of the second air passage groove.

[0011] In some embodiments, when two suction valve plates are arranged on the suction valve plate, the two suction valve plates are symmetrically arranged, the first exhaust port is opened on the outside of the suction valve plate, the first air passage groove includes a first groove segment and a second groove segment, one end of the first groove segment and the second groove segment respectively intersects with the second end of the outline of the second air passage groove, and the other end of the first groove segment and the second groove segment intersects with the projection outline of the first exhaust port on the end surface of the piston.

[0012] In some embodiments, the first air passage groove further includes a third groove segment, one end of the third groove segment intersects with the outline of the outer circle of the piston, and the other end of the third groove segment intersects with the projection outline of the first exhaust port on the end surface of the piston.

[0013] In some embodiments, when the suction valve plate is provided with three suction valve plates in a row, the three second vent grooves are in communication with each other, the two ends of the profile line of the second vent groove at the two sides are respectively intersected with the profile line of the outer circle of the piston, the first end of the profile line of the second vent groove at the middle is extended in the radial direction of the piston end face, and the second end of the profile line of the second vent groove at the middle is intersected with the profile line of the outer circle of the piston; the first vent groove comprises a first groove segment and a second groove segment, the first groove segment and the second groove segment are in a V shape, one end of the first groove segment and the second groove segment is respectively intersected with the first end of the profile line of the second vent groove, and the other end of the first groove segment and the second groove segment is intersected with the projection profile line of the first exhaust port on the piston end face.

[0014] In some embodiments, the first vent groove further comprises a third groove segment, one end of the third groove segment is intersected with the profile line of the outer circle of the piston, and the other end of the third groove segment is intersected with the projection profile line of the first exhaust port on the piston end face.

[0015] In some embodiments, when four suction valve plates are provided along the circumference of the suction valve plate, the four second vent grooves are in communication with each other, the first end of the profile line of the second vent groove is intersected with the profile line of the outer circle of the piston, and the second end of the profile line of the second vent groove is extended in the radial direction of the piston end face, the suction valve plate is provided with four first exhaust ports at intervals on the suction valve plate, and the first vent groove comprises a first groove segment, one end of the first groove segment is intersected with the second end of the profile line of the second vent groove, and the other end of the first groove segment is intersected with the projection profile line of the first exhaust port on the piston end face.

[0016] In some embodiments, the first vent groove further comprises a second groove segment, one end of the second groove segment is intersected with the profile line of the outer circle of the piston, and the other end of the second groove segment is intersected with the projection profile line of the first exhaust port on the piston end face.

[0017] A compressor comprising a cylinder assembly, wherein the cylinder assembly is the cylinder assembly described above.

[0018] The cylinder assembly and the compressor provided by the application have the following beneficial effects:

[0019] In the present application, the first vent groove is located at the piston end face, close to the inner wall of the compression chamber, which can effectively collect the high-pressure gas flowing along the inner wall of the compression chamber and guide the gas to flow to the direction of the suction valve plate. The second vent groove is arranged around the suction valve plate and communicates with the first vent groove, thereby providing a complete path for the gas to flow from the piston end face to the exhaust port, so that the gas can be smoothly discharged. The exhaust passage formed by the communication of the first vent groove and the second vent groove greatly increases the exhaust flow area of the piston near the top dead center, which is much larger than the exhaust area of the conventional gap between the piston and the exhaust port. In the critical stage of the piston near the top dead center, the first vent groove and the second vent groove work together to discharge the gas from the cylinder in time, thereby avoiding the phenomenon of over-compression caused by poor exhaust, improving the performance of the compressor, and ensuring the efficient and stable operation of the compressor in the full frequency range. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0021] Figure 1 It is an exploded view of the cylinder assembly of the embodiment of the present application.

[0022] Figure 2 It is a cross-sectional view of the cylinder assembly of the embodiment of the present application.

[0023] Figure 3 It is a schematic view of the embodiment of the present application when the suction valve plate is provided on the suction valve plate.

[0024] Figure 4 It is a schematic view of the suction valve plate when the suction valve plate is provided on the suction valve plate of the embodiment of the present application.

[0025] Figure 5 It is a schematic view of the first vent groove when the suction valve plate is provided on the suction valve plate of the embodiment of the present application.

[0026] Figure 6 It is a schematic view when the suction valve plate is provided with two suction valve plates on the suction valve plate of the embodiment of the present application.

[0027] Figure 7 It is a schematic view of the suction valve plate when the suction valve plate is provided with two suction valve plates on the suction valve plate of the embodiment of the present application.

[0028] Figure 8 It is a schematic view of the first vent groove when the suction valve plate is provided with two suction valve plates on the suction valve plate of the embodiment of the present application.

[0029] Figure 9 Fig. 1 is a schematic view of an embodiment of the present application when three suction valve pieces are arranged in a row on the suction piece;

[0030] Figure 10 Fig. 2 is a schematic view of a suction valve piece when three suction valve pieces are arranged in a row on the suction piece;

[0031] Figure 11 Fig. 3 is a schematic view of a first air passage when three suction valve pieces are arranged in a row on the suction piece;

[0032] Figure 12 Fig. 4 is a schematic view of an embodiment of the present application when four suction valve pieces are arranged along the circumference of the suction piece;

[0033] Figure 13 Fig. 5 is a schematic view of a suction valve piece when four suction valve pieces are arranged along the circumference of the suction piece;

[0034] Figure 14 Fig. 6 is a schematic view of a first air passage when four suction valve pieces are arranged along the circumference of the suction piece;

[0035] Figure 15 Fig. 7 is a schematic view of an embodiment of the present application when a third air passage is formed on the suction piece;

[0036] Figure 16 Fig. 8 is a schematic view of a suction valve piece when a third air passage is formed on the suction piece;

[0037] Figure 17 Fig. 9 is a schematic view of a first air passage when a third air passage is formed on the suction piece.

[0038] FIG. 1 is a schematic view of an embodiment of the present application when three suction valve pieces are arranged in a row on the suction piece; DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the scope of protection of the present application.

[0040] In the description of the present application, it needs to be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or positional relationship is generally based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0041] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures.

[0042] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Figures 1 to 14 As shown, according to the embodiment of the present application, a cylinder assembly is provided, which comprises a cylinder body 1, an air suction piece 2 and a piston 3; a compression cavity 4 is formed in the cylinder body 1, and the piston 3 reciprocates in the compression cavity 4; the air suction piece 2 is installed on the cylinder body 1, the air suction piece 2 covers the compression cavity 4, the air suction piece 2 is provided with an air suction valve piece 201, and a second air passage 202 is formed around the outer contour of the air suction valve piece 201; a first air passage 301 is formed in the end surface of the piston 3 facing the air suction piece 2, the contour line of the second air passage 202 is projected on the end surface of the piston 3, one end of the first air passage 301 intersects with the outer contour line of the piston 3, and the other end of the first air passage 301 intersects with the contour line of the second air passage 202; a first exhaust port 203 is formed on the air suction piece 2, the projection contour line of the first exhaust port 203 on the end surface of the piston 3 intersects with the first air passage 301, and the first air passage 301 connects the second air passage 202 and the first exhaust port 203, so that the gas near the inner wall surface of the compression cavity 4 is discharged from the first exhaust port 203.

[0043] It is worth mentioning that, as the piston 3 continues to move up to approach the top dead center position, the linear distance between the piston 3 and the exhaust port is reduced to tens of microns. At this time, the exhaust direction of the high-pressure gas in the cylinder changes, which is perpendicular to the movement direction of the piston 3 and parallel to the end surface of the piston 3, and the exhaust port of the valve seat is directed from the cylinder wall surface. At this time, the minimum flow area becomes the product of the linear distance between the piston 3 and the exhaust port of the valve seat and the circumference of the exhaust port of the valve seat, which is much smaller than the cross-sectional area of the exhaust port of the valve seat, that is, the gas will not be exhausted vertically from the exhaust port, but will be exhausted along the inner wall of the compression chamber 4. The cylinder body 1 includes a cylinder cover 5, and the suction blade 2 is fixed between the cylinder cover 5 and the compression chamber 4. A second exhaust port 501 is formed in the cylinder cover 5, and the centers of the first exhaust port 203 and the second exhaust port 501 coincide, and the two holes are connected. After the gas is compressed, it is sequentially exhausted through the first exhaust port 203 and the second exhaust port 501.

[0044] Specifically, when the piston 3 approaches the top dead center, the high-pressure gas near the inner wall surface of the compression chamber 4 flows along the inner wall surface of the compression chamber 4 to the end surface of the piston 3 under the action of the pressure difference. Since the end surface of the piston 3 towards the suction blade 2 is provided with a first air passage 301, the gas enters the first air passage 301, one end of the first air passage 301 intersects with the outer circular contour line of the piston 3, and the other end intersects with the contour line of the second air passage 202 on the suction blade 2, so that the gas flowing along the wall flows into the first air passage 301. Since the first air passage 301 is communicated with the second air passage 202, the gas continues to flow to the second air passage 202. The suction blade 2 is provided with a first exhaust port 203, and the projection contour line of the first exhaust port 203 on the end surface of the piston 3 intersects with the first air passage 301. The gas passes through the first air passage 301 and enters the second air passage 202, and finally exhausts the cylinder from the first exhaust port 203.

[0045] In the embodiment, when the first vent groove 301 is not provided, when the piston 3 approaches the top dead center, the straight-line distance between the piston 3 and the exhaust port is extremely small, and the gas wall-flow can only be discharged from the small gap between the piston 3 and the exhaust port, at this time, the exhaust flow area is sharply reduced, and the exhaust resistance is increased. The provision of the first vent groove 301 provides a new exhaust path for the high-pressure gas near the inner wall of the compression chamber 4. When the piston 3 approaches the top dead center, the wall-flow gas can directly enter the first vent groove 301, and then flow to the first exhaust port 203 through the communication with the second vent groove 202 for discharge. In the traditional structure, when the piston 3 approaches the top dead center, the minimum exhaust flow area is only the product of the straight-line distance between the piston 3 and the exhaust port and the circumference of the exhaust port, and the area is very small. The first vent groove 301 cooperates with the second vent groove 202, and the flow area is much larger than the minimum flow area of the traditional path, so that the gas can be more smoothly discharged when the piston 3 approaches the top dead center, and the exhaust resistance is reduced. Due to the increase of the exhaust flow area, the resistance loss of the gas flow is reduced. Under the same exhaust volume, the energy required for the gas to be discharged through the first vent groove 301 and the second vent groove 202 is reduced. The reduction of the exhaust resistance means that the work consumed by the compressor during the exhaust stage is reduced, thereby reducing the overall power consumption of the compressor and improving the operating efficiency of the compressor.

[0046] In the embodiment, the first vent groove 301 is located on the end face of the piston 3 and is close to the inner wall of the compression chamber 4, can effectively collect the high-pressure gas flowing along the inner wall of the compression chamber 4, and guide the gas to flow to the direction of the suction blade 2. The second vent groove 202 surrounds the suction valve blade 201 on the suction blade 2, and after being communicated with the first vent groove 301, provides a complete path for the gas to flow from the end face of the piston 3 to the exhaust port, so that the gas can be smoothly discharged. The exhaust passage formed by the communication of the first vent groove 301 and the second vent groove 202 greatly increases the exhaust flow area when the piston 3 approaches the top dead center, and is much larger than the exhaust area of the traditional gap between the piston 3 and the exhaust port. In the critical stage when the piston 3 approaches the top dead center, the first vent groove 301 and the second vent groove 202 work cooperatively to discharge the gas from the cylinder in time, avoid the high pressure in the cylinder due to poor exhaust, thereby reducing the over-compression phenomenon, improving the performance of the compressor, and especially when the compressor is operated at high frequency, the reduction of the exhaust resistance is more significant, and the compressor can be operated efficiently and stably in the full frequency range.

[0047] For reference Figures 1 to 8 As shown in FIG. 2, the end face of the piston 3 is taken as a projection plane, the contour line of the second vent groove 202 is projected on the end face of the piston 3, the first end of the contour line of the second vent groove 202 intersects with the outer contour line of the piston 3, and the second end of the contour line of the second vent groove 202 extends in the radial direction of the end face of the piston 3.

[0048] Specifically, the first air passage 301 is arranged on the end surface of the piston 3 facing the suction blade 2, and gas flows into the first air passage 301 smoothly. One end of the first air passage 301 intersects with the outer circular contour line of the piston 3, and the first end of the second air passage 202 contour line intersects with the outer circular contour line of the piston 3, thereby providing a clear inlet for the high-pressure gas near the inner wall surface of the compression chamber 4. When the piston 3 approaches the top dead center, the high-pressure gas near the inner wall surface of the compression chamber 4 flows along the inner wall surface of the compression chamber 4 to the end surface of the piston 3 under the action of the pressure difference, and enters the second air passage 202 through the inlet and the first air passage 301. The other end of the first air passage 301 intersects with the contour line of the second air passage 202 on the suction blade 2. The contour line of the second air passage 202 is projected on the end surface of the piston 3, the first end of the second air passage 202 contour line intersects with the outer circular contour line of the piston 3, and the second end extends in the radial direction of the end surface of the piston 3 and is attached to the inner wall surface of the compression chamber 4. After the gas near the inner wall surface of the compression chamber 4 flows from the first air passage 301 into the second air passage 202, the gas flows along the projection path of the contour line of the second air passage 202 on the end surface of the piston 3. Since the contour line of the second air passage 202 extends in the radial direction, the gas can flow to the central region of the suction blade 2 along this direction. The first exhaust port 203 is arranged on the suction blade 2, and the projection contour line of the first exhaust port 203 on the end surface of the piston 3 intersects with the first air passage 301. After the gas enters the second air passage 202 through the first air passage 301, the gas continues to flow to the first exhaust port 203 under the guidance of the first air passage 301, and finally is discharged from the cylinder through the first exhaust port 203.

[0049] In the embodiment, the first end of the second air passage 202 contour line intersects with the outer circular contour line of the piston 3, thereby providing a clear inlet for the high-pressure gas near the inner wall surface of the compression chamber 4, connecting the high-pressure region near the inner wall surface of the compression chamber 4 with the exhaust system, and ensuring that the gas can flow smoothly from the inner wall region of the cylinder into the exhaust passage, thereby avoiding the accumulation of gas near the inner wall of the compression chamber 4 and improving the exhaust efficiency. By defining the positions and mutual relationship of the first air passage 301 and the second air passage 202, the path of the gas flowing from the inner wall surface of the compression chamber 4 through the first air passage 301 and the second air passage 202 to the exhaust port is clear and coherent, and the gas can flow along the predetermined path, thereby reducing the disordered movement and energy loss of the gas during the exhaust process and improving the exhaust efficiency.

[0050] For reference Figures 1 to 8As shown, when the suction valve plate 201 is provided on the suction valve plate 2, it is the first embodiment, the first exhaust port 203 is opened on the suction valve plate 201, the first air passage groove 301 includes the first groove section 311 and the second groove section 312, the first groove section 311 and the second groove section 312 are V-shaped, one end of the first groove section 311 and the second groove section 312 respectively intersects with the second end of the second air passage groove 202 profile line, the other end of the first groove section 311 and the second groove section 312 intersects with the projection profile line of the first exhaust port 203 on the piston 3 end surface.

[0051] Specifically, when the piston 3 approaches the top dead center, the high-pressure gas near the inner wall surface of the compression chamber 4 flows along the inner wall surface of the compression chamber 4 to the piston 3 end surface under the action of the pressure difference, enters the first air passage groove 301 on the piston 3 end surface, and enters the second air passage groove 202 from the gap between the outer circle of the piston 3 and the inner wall of the compression chamber 4 due to the intersection of the first end of the second air passage groove 202 profile line and the outer circle profile line of the piston 3. The projection of the profile line of the second air passage groove 202 on the piston 3 end surface has its first end intersecting with the outer circle profile line of the piston 3, and its second end extending in the radial direction of the piston 3 end surface. After the gas enters the second air passage groove 202, it flows along the projection path of the profile line, that is, from the outer circle direction to the center area of the suction valve plate 2. The first groove section 311 and the second groove section 312 of the first air passage groove 301 are V-shaped, one end of each intersects with the second end of the profile line of the second air passage groove 202. When the gas flows to the second end of the profile line of the second air passage groove 202, it is divided into the first groove section 311 and the second groove section 312. The V-shaped arrangement allows the gas to be evenly divided into two directions, increasing the flow area of the gas and further reducing the exhaust resistance.

[0052] In this embodiment, the first groove section 311 and the second groove section 312 are V-shaped, one end of each intersects with the second end of the profile line of the second air passage groove 202, and the other end intersects with the projection profile line of the first exhaust port 203 on the piston 3 end surface. This arrangement provides two exhaust paths for the gas, greatly increasing the flow area of the gas compared to a single path. The increase in flow area significantly reduces the resistance experienced by the gas during discharge, especially under the working condition where the piston 3 approaches the top dead center and the exhaust gap is extremely small, effectively alleviating the problem of rapid increase in exhaust resistance. The V-shaped groove section allows the gas to be evenly divided into two directions before entering the first exhaust port 203, avoiding excessive concentration of gas in local areas or flow dead angles, reducing energy loss, and providing clear flow paths for the gas to flow more smoothly and orderly, reducing the degree of turbulence of the gas flow and improving the exhaust efficiency.

[0053] With reference to Figures 1 to 8 As shown, the first vent groove 301 further comprises third groove segments 313, a plurality of third groove segments 313 are arranged along the circumferential direction of the end face of the piston 3, one end of the third groove segment 313 intersects with the outer circular contour line of the piston 3, and the other end of the third groove segment 313 intersects with the second end of the second vent groove 202 contour line.

[0054] Specifically, when the piston 3 approaches the top dead center, the gas in the cylinder is compressed, the pressure rises, and the high-pressure gas near the inner wall surface of the compression chamber 4 flows along the inner wall surface of the compression chamber 4 to the end face of the piston 3 under the action of the pressure difference. Since one end of the third groove segment 313 intersects with the outer circular contour line of the piston 3, the gas can enter the third groove segment 313 from the gap between the outer circle of the piston 3 and the inner wall of the compression chamber 4. The third groove segment 313 is arranged along the circumferential direction of the end face of the piston 3, and after the gas enters the third groove segment 313, it flows in the circumferential direction. This circumferential flow helps to guide the gas from different circumferential positions of the cylinder to the second vent groove 202. The other end of the third groove segment 313 intersects with the second end of the second vent groove 202 contour line, and after the gas flows in the third groove segment 313, it enters the second vent groove 202. After the gas enters the second vent groove 202, it flows along the projection path of the contour line of the second vent groove 202 on the end face of the piston 3. The second end of the second vent groove 202 contour line is connected with the first groove segment 311 and the second groove segment 312. When the gas flows to the second end in the second vent groove 202, it is divided into the first groove segment 311 and the second groove segment 312, and the first groove segment 311 and the second groove segment 312 are V-shaped. The gas flows along the two groove segments to the first exhaust port 203 respectively. The other end of the first groove segment 311 and the second groove segment 312 intersects with the projection contour line of the first exhaust port 203 on the end face of the piston 3, and the gas flows along the first groove segment 311 and the second groove segment 312 respectively, and finally converges at the position of the first exhaust port 203. The gas is discharged from the cylinder through the first exhaust port 203.

[0055] In this embodiment, the third groove segment 313 is opened along the circumferential direction of the end face of the piston 3, and a plurality of third groove segments 313 are uniformly distributed and connected with the second vent groove 202. This arrangement significantly increases the flow area of the gas, providing more exhaust paths for the gas. More flow paths and larger flow areas help to reduce exhaust resistance, allowing the gas to be discharged more smoothly from the cylinder. The third groove segment 313 is opened along the circumferential direction, which can uniformly collect high-pressure gas from different circumferential positions of the cylinder, avoiding local accumulation of gas near the inner wall of the compression chamber 4, allowing the gas to enter the exhaust system more uniformly. Through the circumferential distribution of the plurality of third groove segments 313, the gas at each position in the cylinder can be effectively collected and guided, reducing the residence time of the gas in the cylinder. The plurality of third groove segments 313 simultaneously collect and guide the gas to the second vent groove 202, accelerating the flow speed of the gas and improving the exhaust efficiency. By uniformly collecting and guiding the gas, the third groove segment 313 helps to more thoroughly discharge the high-pressure gas in the cylinder, reducing gas residue caused by poor exhaust.

[0056] In this embodiment, the third groove segment 313 is opened along the circumferential direction of the end face of the piston 3, and a plurality of third groove segments 313 are uniformly distributed, one end intersects the outer circular contour line of the piston 3, and the other end is connected with the second vent groove 202. The third groove segment 313 collects and guides high-pressure gas from different circumferential positions of the cylinder to the second vent groove 202, and the second vent groove 202 guides the gas to the first groove segment 311 and the second groove segment 312, which are V-shaped, allowing the gas to be evenly distributed and avoiding local concentration, reducing energy loss. The combination of the third groove segment 313, the second vent groove 202, and the first groove segment 311 and the second groove segment 312 significantly increases the exhaust flow area, providing more exhaust paths for the gas. The larger flow area and multi-path arrangement reduce exhaust resistance, allowing the gas to be discharged more smoothly, especially when the piston 3 is close to the top dead center.

[0057] For reference Figures 1 to 8 As shown in FIG. 2, when two suction valve pieces 201 are provided on the suction piece 2, it is the second embodiment, the two suction valve pieces 201 are symmetrically arranged, the first exhaust port 203 is opened on the outside of the suction valve piece 201, the first vent groove 301 includes the first groove segment 311 and the second groove segment 312, one end of the first groove segment 311 and the second groove segment 312 respectively intersects the second end of the contour line of the second vent groove 202, and the other end of the first groove segment 311 and the second groove segment 312 intersects the projected contour line of the first exhaust port 203 on the end face of the piston 3.

[0058] Specifically, the high-pressure gas near the inner wall of the compression chamber 4 flows along the inner wall of the compression chamber 4 to the end face of the piston 3 under the action of the pressure difference, enters the first air passage 301 on the end face of the piston 3, and flows to the second air passage 202. Since the first end of the contour line of the second air passage 202 intersects the contour line of the outer circle of the piston 3, the gas can enter the second air passage 202 from the gap between the outer circle of the piston 3 and the inner wall of the compression chamber 4. One end of the first slot section 311 and the second slot section 312 respectively intersects the second end of the contour line of the second air passage 202, and when the gas flows to the second end of the second air passage 202, it is divided into the first slot section 311 and the second slot section 312. Since the two gas suction valve plates 201 are symmetrically arranged, the first slot section 311 and the second slot section 312 are also symmetrically arranged, so that the gas can be uniformly divided into two directions. The other end of the first slot section 311 and the second slot section 312 intersects the projected contour line of the first exhaust port 203 on the end face of the piston 3, and the gas flows along the first slot section 311 and the second slot section 312 respectively, and finally converges to the position of the first exhaust port 203, and is discharged from the cylinder through the first exhaust port 203. The two gas suction valve plates 201 are symmetrically arranged, and the first slot section 311 and the second slot section 312 are also symmetrically arranged, so that the gas can be uniformly divided into two directions, avoiding excessive concentration of the gas on one side, and improving the uniformity and efficiency of the exhaust.

[0059] In the present embodiment, one end of the first air passage 301 intersects the contour line of the outer circle of the piston 3, and the other end intersects the contour line of the second air passage 202. The contour line of the second air passage 202 is projected on the end face of the piston 3 and intersects the projected contour line of the first exhaust port 203. This arrangement guides the high-pressure gas near the inner wall of the compression chamber 4 to enter the first air passage 301 from the outer circle of the piston 3, then flow into the second air passage 202, and finally flow to the first exhaust port 203 for discharge. When two gas suction valve plates 201 are arranged on the gas suction plate 2, the arrangement of the first air passage 301 and the second air passage 202 can make the gas flow more uniformly to the two gas suction valve plates 201, avoiding excessive concentration of the gas in a certain area, and making the exhaust process more balanced.

[0060] As a specific embodiment, two first exhaust ports 203 are arranged on the outside of the gas suction valve plate 201 on the gas suction plate 2, and each first exhaust port 203 is correspondingly provided with a first slot section 311 and a second slot section 312. When the gas flows to the second end of the second air passage 202, the gas can be discharged more quickly.

[0061] For reference Figures 1 to 8 As shown in FIG. 6, the first air passage 301 further includes a third slot section 313. One end of the third slot section 313 intersects the contour line of the outer circle of the piston 3, and the other end of the third slot section 313 intersects the projected contour line of the first exhaust port 203 on the end face of the piston 3.

[0062] In this embodiment, the high-pressure gas near the inner wall of the compression chamber 4 is pushed by the pressure difference and flows along the inner wall of the compression chamber 4 to the end face of the piston 3. Since one end of the third groove segment 313 intersects the outer circular contour line of the piston 3, the gas can smoothly enter the third groove segment 313, which provides a flow path for the gas from the outer circle of the piston 3 to the direction of the first exhaust port 203. The gas flows in the third groove segment 313 and gradually approaches the projected contour line of the first exhaust port 203 on the end face of the piston 3. The other end of the third groove segment 313 intersects the projected contour line of the first exhaust port 203 on the end face of the piston 3, the gas flows along the third groove segment 313, and finally reaches the position of the first exhaust port 203 and is discharged from the first exhaust port 203 to the cylinder. The third groove segment 313 provides an additional path for gas discharge, further increases the exhaust flow area, reduces the exhaust resistance, and makes the gas flow more smooth, reduces the residence time of the gas near the inner wall of the compression chamber 4, and the third groove segment 313 is provided on the suction blade 2. When two suction valve blades 201 are provided, more paths are provided for gas discharge, further optimizing the exhaust process, improving the exhaust efficiency, reducing the power consumption, and enhancing the performance and stability of the compressor.

[0063] For reference Figures 9 to 11 As shown, when the suction blade 2 is provided with three suction valve blades 201 in a row, this is the third embodiment, the three second air passages 202 are connected to each other, the two ends of the contour line of the second air passage 202 on both sides are respectively intersected with the outer circular contour line of the piston 3, the first end of the contour line of the second air passage 202 in the middle position extends in the radial direction of the end face of the piston 3, and the second end of the contour line of the second air passage 202 in the middle position is intersected with the outer circular contour line of the piston 3; the first air passage 301 includes a first groove segment 311 and a second groove segment 312, the first groove segment 311 and the second groove segment 312 are V-shaped, one end of the first groove segment 311 and the second groove segment 312 is respectively intersected with the first end of the contour line of the second air passage 202, and the other end of the first groove segment 311 and the second groove segment 312 is intersected with the projected contour line of the first exhaust port 203 on the end face of the piston 3.

[0064] Specifically, the high-pressure gas near the inner wall of the compression chamber 4 flows along the inner wall of the compression chamber 4 to the end face of the piston 3 under the action of the pressure difference, enters the first air passage 301 on the end face of the piston 3, and flows to the second air passage 202. The three second air passages 202 are connected to each other, and the two ends of the profile lines of the second air passages 202 at the two sides respectively intersect the outer circular profile line of the piston 3. The first end of the profile line of the second air passage 202 at the middle position extends in the radial direction of the end face of the piston 3, and the second end intersects the outer circular profile line of the piston 3. After the gas enters the second air passage 202 from the intersection, it flows along the profile line of each second air passage 202. The first groove section 311 and the second groove section 312 are V-shaped, one end of each of the first groove section 311 and the second groove section 312 intersects the first end of the profile line of the second air passage 202, and when the gas flows to the corresponding position of the second air passage 202 at the middle position, it is divided into the first groove section 311 and the second groove section 312. The other end of the first groove section 311 and the second groove section 312 intersects the projected profile line of the first exhaust port 203 on the end face of the piston 3. The gas flows along the first groove section 311 and the second groove section 312 respectively, and finally converges at the position of the first exhaust port 203, and is discharged from the cylinder through the first exhaust port 203.

[0065] In the present embodiment, the three suction valve pieces 201 correspond to multiple exhaust regions, the first groove section 311 and the second groove section 312 are V-shaped, are connected to the second air passage 202, and provide multiple exhaust paths for the gas, so that the gas can be discharged from different regions, improving the exhaust efficiency. The arrangement of the three suction valve pieces 201 increases the number of exhaust ports, and the arrangement of the first groove section 311 and the second groove section 312 increases the exhaust flow area and reduces the exhaust resistance, so that the gas is more easily discharged. The arrangement of the three suction valve pieces 201 in a row enables the gas to be more evenly distributed on the cross section of the cylinder, the V-shaped arrangement of the first groove section 311 and the second groove section 312 enables the gas to be evenly divided, avoiding local concentration and reducing energy loss. The arrangement of the three suction valve pieces 201 and the multiple groove sections enables the compressor to better adapt to different working conditions and load conditions, especially when running at high frequency, the multiple-path exhaust arrangement has a more significant effect on reducing exhaust resistance, ensuring efficient and stable operation of the compressor in the full frequency range.

[0066] For reference Figures 9 to 11 As shown in FIG. 1, the first air passage 301 also includes a third groove section 313, one end of the third groove section 313 intersects the outer circular profile line of the piston 3, and the other end of the third groove section 313 intersects the projected profile line of the first exhaust port 203 on the end face of the piston 3.

[0067] In the embodiment, due to the third groove segment 313, one end of the third groove segment 313 intersects with the outer circular contour line of the piston 3, and the gas can smoothly enter the third groove segment 313, and the third groove segment 313 provides a flow path for the gas from the outer circle of the piston 3 to the direction of the first exhaust port 203, and the gas flows in the third groove segment 313 and gradually approaches the projection contour line of the first exhaust port 203 on the end surface of the piston 3.

[0068] For reference Figures 12 to 14 As shown in the drawings, when four air suction valve plates 201 are arranged along the circumference of the air suction plate 2, this is a fourth embodiment, the four second ventilation grooves 202 are connected to each other, the first end of the second ventilation groove 202 contour line intersects with the outer circular contour line of the piston 3, and the second end of the second ventilation groove 202 contour line extends in the radial direction of the end surface of the piston 3, the four first exhaust ports 203 are arranged on the air suction valve plate 201 of the air suction plate 2 at intervals, the first ventilation groove 301 includes a first groove segment 311, one end of the first groove segment 311 intersects with the second end of the second ventilation groove 202 contour line, and the other end of the first groove segment 311 intersects with the projection contour line of the first exhaust port 203 on the end surface of the piston 3. Preferably, the number of first ventilation grooves 301 is greater than the number of first exhaust ports 203, so as to ensure that at least one gas groove on the first ventilation groove 301 is connected to the nearby second ventilation groove 202 at the nearest distance, that is, the first ventilation groove 301 can be configured as a "Y" shape.

[0069] Specifically, the high-pressure gas near the inner wall surface of the compression chamber 4 flows along the inner wall surface of the compression chamber 4 to the end surface of the piston 3 under the action of the pressure difference. Due to the intersection of the first end of the second ventilation groove 202 contour line and the outer circular contour line of the piston 3, the gas can smoothly enter the second ventilation groove 202. The four second ventilation grooves 202 are connected to each other, the first end of the second ventilation groove 202 contour line intersects with the outer circular contour line of the piston 3, and the second end extends in the radial direction of the end surface of the piston 3, so that after the gas enters the second ventilation groove 202, it flows in the radial direction to the central area of the air suction plate 2. One end of the first groove segment 311 of the first ventilation groove 301 intersects with the second end of the second ventilation groove 202 contour line, and when the gas flows to the second end in the second ventilation groove 202, it enters the first groove segment 311, and the first groove segment 311 provides a flow path for the gas from the second ventilation groove 202 to the direction of the first exhaust port 203. The other end of the first groove segment 311 intersects with the projection contour line of the first exhaust port 203 on the end surface of the piston 3, the gas flows along the first groove segment 311, and finally reaches the position of the first exhaust port 203 and is discharged from the first exhaust port 203 to the cylinder, and the four first exhaust ports 203 arranged at intervals on the four air suction valve plates 201 enable the gas to be uniformly discharged, further improving the exhaust efficiency.

[0070] In the embodiment, the four suction valve pieces 201 correspond to multiple exhaust areas, each of the suction valve pieces 201 is provided with a first exhaust port 203, the first ventilation groove 301 cooperates with the second ventilation groove 202 to provide multiple exhaust paths for the gas, significantly increasing the exhaust flow area, the larger flow area reduces the exhaust resistance, and the gas is more smoothly discharged from the cylinder. Four suction valve pieces 201 are evenly distributed along the circumference of the suction piece 2, so that the gas can be uniformly discharged from different circumferential positions of the cylinder, avoiding excessive concentration of the gas in the local area, the first ventilation groove 301 guides the gas from the second ventilation groove 202 to the four first exhaust ports 203, ensuring uniform distribution of the gas and reducing energy loss.

[0071] For reference Figures 12 to 14 As shown in the figure, the first ventilation groove 301 also includes a second groove segment 312, one end of the second groove segment 312 intersects with the outer circular contour line of the piston 3, and the other end of the second groove segment 312 intersects with the projection contour line of the first exhaust port 203 on the end face of the piston 3.

[0072] In the embodiment, one end of the second groove segment 312 intersects with the outer circular contour line of the piston 3, and the other end intersects with the projection contour line of the first exhaust port 203 on the end face of the piston 3, providing an additional path for gas discharge, the first exhaust port 203 on the four suction valve pieces 201 cooperates with the second groove segment 312 to provide multiple exhaust paths, so that the gas can be discharged from different positions, improving the exhaust efficiency, the four suction valve pieces 201 are evenly distributed along the circumference, the second groove segment 312 guides the gas to flow uniformly to each exhaust port, avoiding local concentration of the gas and reducing energy loss.

[0073] For reference Figures 15 to 17 As a fifth embodiment, different from the first four embodiments, the first exhaust port 203 is arranged on the outside of the suction valve piece 201, and when one suction valve piece 201 is arranged, the second ventilation groove 202 is connected with the first exhaust port 203 by arranging a third ventilation groove on the suction piece 2, and the first ventilation groove 301 is arranged on the end of the piston 3, one end of the first ventilation groove 301 intersects with the outer circular contour line of the piston 3, and the other end intersects with the projection contour line of the first exhaust port 203 on the end face of the piston 3. In this embodiment,

[0074] A compressor comprising a cylinder assembly, the cylinder assembly being the cylinder assembly described above.

[0075] It is easy for those skilled in the art to understand that the above advantageous modes can be freely combined and superimposed without conflict.

[0076] The above merely describes the preferred embodiments of the present application, but should not be used to limit the present application, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application. The above merely describes the preferred embodiments of the present application, but should not be used to limit the present application, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cylinder assembly, characterized by The utility model relates to a cylinder body (1), suction blade (2) and piston (3) are included. The cylinder body (1) is provided with a compression chamber (4), and the piston (3) reciprocates in the compression chamber (4); the suction blade (2) is installed on the cylinder body (1), the suction blade (2) covers the compression chamber (4), and the suction blade (2) is provided with a suction valve (201); the second air groove (202) is formed around the outer contour of the suction valve (201). The first air groove (301) is formed on the end surface of the piston (3) facing the suction blade (2); the contour line of the second air groove (202) is projected on the end surface of the piston (3); one end of the first air groove (301) intersects with the outer contour line of the piston (3), and the other end of the first air groove (301) intersects with the contour line of the second air groove (202). The first exhaust port (203) is formed on the suction blade (2), and the projection contour line of the first exhaust port (203) on the end surface of the piston (3) intersects with the first air groove (301); the first air groove (301) connects the second air groove (202) with the first exhaust port (203), so that the gas near the inner wall of the compression chamber (4) is discharged from the first exhaust port (203). The contour line of the second air groove (202) is projected on the end surface of the piston (3); the first end of the contour line of the second air groove (202) intersects with the outer contour line of the piston (3), and the second end of the contour line of the second air groove (202) extends in the radial direction of the end surface of the piston (3).

2. The cylinder assembly of claim 1, wherein, When the suction blade (2) is provided with one suction valve (201), the first exhaust port (203) is formed on the suction valve (201); the first air groove (301) includes a first groove section (311) and a second groove section (312); the first groove section (311) and the second groove section (312) are V-shaped; one end of the first groove section (311) and the second groove section (312) respectively intersects with the second end of the contour line of the second air groove (202); the other end of the first groove section (311) and the second groove section (312) intersects with the projection contour line of the first exhaust port (203) on the end surface of the piston (3).

3. The cylinder assembly of claim 2, wherein, The first air groove (301) further includes a third groove section (313); a plurality of third groove sections (313) are formed along the circumferential direction of the end surface of the piston (3); one end of the third groove section (313) intersects with the outer contour line of the piston (3), and the other end of the third groove section (313) intersects with the second end of the contour line of the second air groove (202).

4. The cylinder assembly of claim 3, wherein, ​ 5. The cylinder assembly of claim 2, wherein, When two of the air valve pieces (201) are arranged on the air piece (2), the two air valve pieces (201) are symmetrically arranged, the first exhaust port (203) is arranged on the outer side of the air valve piece (201), the first air passage groove (301) comprises a first groove section (311) and a second groove section (312), one end of the first groove section (311) and the second groove section (312) respectively intersects with the second end of the second air passage groove (202) contour line, the other end of the first groove section (311) and the second groove section (312) intersects with the projection contour line of the first exhaust port (203) on the end face of the piston (3).

6. The cylinder assembly of claim 5, wherein, The first air passage groove (301) further comprises a third groove section (313), one end of the third groove section (313) intersects with the outer circle contour line of the piston (3), and the other end of the third groove section (313) intersects with the projection contour line of the first exhaust port (203) on the end face of the piston (3).

7. The cylinder assembly of claim 1, wherein When three of the air valve pieces (201) are arranged in a row on the air piece (2), the three second air passage grooves (202) are communicated with each other, the two ends of the contour line of the second air passage groove (202) at the two sides respectively intersects with the outer circle contour line of the piston (3), the first end of the contour line of the second air passage groove (202) at the middle position extends in the radial direction of the end face of the piston (3), and the second end of the contour line of the second air passage groove (202) at the middle position intersects with the outer circle contour line of the piston (3); the first air passage groove (301) comprises a first groove section (311) and a second groove section (312), the first groove section (311) and the second groove section (312) are in V shape, one end of the first groove section (311) and the second groove section (312) respectively intersects with the first end of the second air passage groove (202) contour line, and the other end of the first groove section (311) and the second groove section (312) intersects with the projection contour line of the first exhaust port (203) on the end face of the piston (3).

8. The cylinder assembly of claim 7, wherein, The first air passage groove (301) further comprises a third groove section (313), one end of the third groove section (313) intersects with the outer circle contour line of the piston (3), and the other end of the third groove section (313) intersects with the projection contour line of the first exhaust port (203) on the end face of the piston (3).

9. The cylinder assembly of claim 1, wherein, When four of the air inlet valve pieces (201) are arranged along the circumference of the air inlet piece (2), four of the second air vent grooves (202) are in communication with each other, a first end of a profile line of the second air vent groove (202) intersects with an outer circle profile line of the piston (3), a second end of the profile line of the second air vent groove (202) extends in a radial direction of an end surface of the piston (3), and four of the first exhaust ports (203) are arranged at intervals on the air inlet piece (2) of the air inlet valve piece (201), the first air vent groove (301) comprises a first groove section (311), one end of the first groove section (311) intersects with the second end of the profile line of the second air vent groove (202), and the other end of the first groove section (311) intersects with a projected profile line of the first exhaust port (203) on the end surface of the piston (3).

10. The cylinder assembly of claim 9, wherein, The first air vent groove (301) further comprises a second groove section (312), one end of the second groove section (312) intersects with the outer circle profile line of the piston (3), and the other end of the second groove section (312) intersects with the projected profile line of the first exhaust port (203) on the end surface of the piston (3).

11. A compressor comprising a cylinder assembly, characterized by, The cylinder assembly is the cylinder assembly according to any one of claims 1 to 10.

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