Compact multi-stage swash plate type compressor liquid cooling device

Abstract

The invention provides a compact multi-stage swash plate compressor liquid cooling device. The compact multi-stage swash plate compressor liquid cooling device comprises a cylinder cooling part, a cylinder cover cooling part and an interstage gas cooling part. A cylinder cooling flow channel is realized by a fluid channel formed by spiral grooves in the outer wall surfaces of all stages of cylinders and a compressor shell, and the design of the spiral flow channel is beneficial to enhancing the heat exchange effect; cooling of the air cylinder cover is achieved through a cooling liquid flow channel in the air cylinder cover, and the cooling liquid flow channel in the air cylinder cover is communicated with a cooling liquid inlet and a cooling liquid outlet in the air cylinder cooling liquid flow channel and the interstage cooling valve block to form a circulation loop. The interstage gas cooling part is integrated in the interstage cooling valve block, the double-layer flow channel design of an inner-layer gas flow channel and an outer-layer cooling liquid flow channel is adopted, and the inner-layer flow channel and the outer-layer flow channel both adopt spiral spoilers to enhance heat exchange. The structure of the multi-stage swash plate type compressor is fully utilized, on the premise that the characteristic that the cooling device is compact is guaranteed, cooling of the air cylinder, the air cylinder cover and interstage gas of the compressor is achieved, and the cooling device has great significance in improving the efficiency of the multi-stage swash plate type compressor and promoting miniaturization of the compressor.

Description

Technical Field

[0001] The invention relates to the technical field of compressor cooling, and in particular to a cooling device suitable for a small multi-stage inclined plate type compressor. Background Art

[0002] The swash plate compressor includes the wobble plate compressor and the swash plate compressor. It is widely used in automobile air conditioning and refrigeration systems because of its compact structure. In some special fields, not only are there higher requirements for the miniaturization of the compressor structure, but also the compressor is required to have high output pressure capabilities. The output pressure of the single-stage swash plate compressor is limited and cannot meet the demand for high pressure output. The multi-stage swash plate compressor came into being as a deformation of the traditional single-stage swash plate compressor. In the multi-stage compressor, interstage cooling is of great significance to improving the efficiency of the compressor. However, the traditional interstage cooling device is large in size and obviously cannot meet the miniaturization requirements. In addition, the temperature of the cylinder and the cylinder head during the operation of the compressor also has an important impact on the efficiency of the compressor. At the same time, cooling the two is also an important way to improve the performance of the compressor. However, how to achieve the cooling of the multi-stage swash plate compressor including the cylinder, the cylinder head and the interstage cooling under the premise of miniaturization requirements is an inevitable problem. Therefore, a compact multi-stage swash plate compressor liquid cooling device is proposed, which is of great significance to improve the efficiency of the multi-stage swash plate compressor and promote the miniaturization of the compressor. Summary of the invention

[0003] In view of the above problems, the purpose of the present invention is to provide a compact multi-stage inclined plate type compressor liquid cooling device. The compressor liquid cooling device mentioned includes a cylinder cooling part, a cylinder head cooling part and an interstage gas cooling part. Cylinder cooling is achieved by a fluid channel composed of the outer wall of each stage of the cylinder and the compressor housing. In order to enhance the convective heat transfer coefficient between the fluid and the wall of the flow channel, an enhanced heat exchange design is adopted. The flow channel between the outer wall of the cylinder and the compressor housing is designed in the form of a spiral flow channel, which not only increases the contact area of ​​​​convective heat transfer but also ensures the turbulent flow of the coolant in the cooling channel. The cylinder head cooling part is mainly designed with a coolant flow channel inside the cylinder head without affecting the normal operation of the intake and exhaust valves. The cooling flow channel inside the cylinder head and the intake and exhaust flow channel not only solve the cylinder head cooling problem, but also provide a transition connection for the gas circuit and the coolant circuit. The interstage gas cooling is integrated inside the interstage cooling valve block, including the first and second interstage cooling chambers, the second and third interstage cooling chambers, the third and fourth interstage cooling chambers and the fourth post-cooling chamber. Each interstage cooling chamber is designed with inner and outer double-layer flow channels. The inner layer is the interstage gas flow channel, and the outer layer is the coolant flow channel. There is a layer of pipe between the inner and outer layers, and spiral spoilers are designed in the inner and outer flow channels to avoid laminar flow of gas and coolant in the flow channels, so as to achieve the purpose of enhanced heat exchange.

[0004] To this end, the present invention provides a compact multi-stage swash plate compressor liquid cooling device, including: a compressor housing, a first-stage cylinder, a first-stage cylinder spiral groove, a first-stage cylinder end sealing ring, a first-stage cylinder tail sealing ring, a second-stage cylinder, a second-stage cylinder spiral groove, a second-stage cylinder end sealing ring, a second-stage cylinder tail sealing ring, a third-stage cylinder, a third-stage cylinder spiral groove, a third-stage cylinder end sealing ring, a third-stage cylinder tail sealing ring, a fourth-stage cylinder, a fourth-stage cylinder spiral groove, a fourth-stage cylinder end sealing ring, a fourth-stage cylinder tail sealing ring, a cylinder coolant inlet flow channel, a cylinder coolant inlet sealing ring, a first- and fourth-stage cylinder coolant connecting flow channel, a fourth- and second-stage cylinder coolant connecting flow channel, a second- and third-stage cylinder coolant connecting flow channel, a cylinder coolant outlet flow channel, a cylinder coolant outlet sealing ring, a cylinder head, a cylinder coolant inlet, a cylinder coolant outlet, a cylinder head coolant inlet, a cylinder head ... Liquid flow channel, first-level air intake, first-level exhaust port, second-level air intake, second-level exhaust port, third-level air intake, third-level exhaust port, fourth-level air intake, fourth-level exhaust port, interstage cooling valve block, first-level exhaust port sealing ring, second-level air intake port sealing ring, second-level exhaust port sealing ring, third-level air intake port sealing ring, third-level exhaust port sealing ring, fourth-level air intake port sealing ring, fourth-level exhaust port sealing ring, cylinder head coolant inlet sealing ring, cylinder coolant outlet sealing ring 2, coolant inlet, coolant outlet, compressor exhaust port, interstage valve block gas flow channel spoiler, interstage valve block gas-liquid flow channel separator pipe, interstage valve block coolant flow channel spoiler, first and second interstage coolant flow channels, first and second interstage gas flow channels, second and third interstage coolant flow channels, second and third interstage gas flow channels, third and fourth interstage coolant flow channels, third and fourth interstage gas flow channels, fourth-stage rear coolant flow channel, fourth-stage rear gas flow channel. The compressor housing, the first-stage cylinder, the first-stage cylinder spiral groove, the first-stage cylinder end sealing ring, the first-stage cylinder tail sealing ring, the second-stage cylinder, the second-stage cylinder spiral groove, the second-stage cylinder end sealing ring, the second-stage cylinder tail sealing ring, the third-stage cylinder, the third-stage cylinder spiral groove, the third-stage cylinder end sealing ring, the third-stage cylinder tail sealing ring, the fourth-stage cylinder, the fourth-stage cylinder spiral groove, the fourth-stage cylinder end sealing ring, the fourth-stage cylinder tail sealing ring, the cylinder coolant inlet flow channel, the cylinder coolant inlet sealing ring, the first and fourth-stage cylinder coolant connecting flow channel, the fourth and second-stage cylinder coolant connecting flow channel, the second and third-stage cylinder coolant connecting flow channel, the cylinder coolant outlet flow channel, the cylinder coolant outlet sealing ring, the cylinder head, the cylinder coolant inlet, the cylinder coolant outlet, etc. together constitute the cylinder cooling structure. The cylinder head, the cylinder coolant inlet, the cylinder coolant outlet, the cylinder head coolant inlet, the cylinder head coolant flow channel, the first-level air intake port, the first-level exhaust port, the second-level air intake port, the second-level exhaust port, the third-level air intake port, the third-level exhaust port, the fourth-level air intake port, and the fourth-level exhaust port together constitute a cylinder head cooling structure.The interstage cooling valve block, the first-stage exhaust port sealing ring, the second-stage air intake port sealing ring, the second-stage exhaust port sealing ring, the third-stage air intake port sealing ring, the third-stage exhaust port sealing ring, the fourth-stage air intake port sealing ring, the fourth-stage exhaust port sealing ring, the cylinder head coolant inlet sealing ring, the cylinder coolant outlet sealing ring 2, the coolant inlet, the coolant outlet, the compressor exhaust port, the interstage valve block gas flow channel spoiler, the interstage valve block gas-liquid flow channel separator pipe, the interstage valve block coolant flow channel spoiler, the first and second interstage coolant flow channels, the first and second interstage gas flow channels, the second and third interstage coolant flow channels, the second and third interstage gas flow channels, the third and fourth interstage coolant flow channels, the third and fourth interstage gas flow channels, the fourth post-cooling liquid flow channel, and the fourth post-gas flow channel together constitute the interstage cooling structure.

[0005] The outer cylindrical surface of each cylinder is designed with a spiral groove. Through the cylinder end seal ring and the tail seal ring, a coolant flow channel that spirally surrounds the cylinder is formed between the outer spiral groove of the cylinder and the compressor housing. The design of the spiral groove not only increases the heat exchange area between the coolant and the cylinder, but also avoids the laminar flow of the coolant in the cooling channel outside the cylinder, thereby increasing the convective heat exchange rate and achieving the purpose of enhanced heat exchange. A connecting flow channel is set between the coolant flow channels of each cylinder to ensure the circulation of the coolant. Considering that the suction capacity of the first-stage compression chamber has an important influence on the exhaust volume of the multi-stage compressor, the first-stage suction capacity is closely related to the first-stage exhaust pressure. At the same time, the fourth-stage compression chamber often bears a larger pressure ratio, and the suction pressure of the second-stage compression chamber affects the first-stage exhaust pressure and indirectly affects the suction capacity of the first-stage compression chamber. The coolant in the cylinder part first enters the first-stage cylinder coolant flow channel through the cylinder coolant inlet flow channel, and then enters the fourth-stage cylinder coolant flow channel through the first-fourth-stage cylinder coolant connecting flow channel, and then enters the second-stage cylinder coolant flow channel through the fourth-two-stage cylinder coolant connecting flow channel, and finally enters the third-stage cylinder coolant flow channel through the second-three-stage cylinder coolant connecting flow channel. After the cylinder head coolant flows through the cylinder head coolant flow channel, it enters the cylinder coolant inlet to provide coolant for the cooling of the cylinder. This cylinder cooling method makes full use of the structural characteristics of the cylinder and the compressor housing, and provides a feasible structural solution for the cooling of the cylinder without increasing the volume of the compressor.

[0006] The cylinder head is not only equipped with the intake and exhaust valves of each chamber, but also directly contacts the compression chambers of each stage, and then exchanges heat with the gases in the compression chambers of each stage and the intake and exhaust chambers of each stage. The part of the cylinder head that is not occupied by the intake and exhaust valves of each stage and their inlet and outlet gas flow channels is fully utilized, and the coolant flow channel is arranged around the part where heat exchange with the gas occurs. Considering the flow resistance and cooling effect of the coolant along the way, the coolant inlet of the cylinder head is directly connected to the coolant inlet of the compressor through the cylinder head coolant inlet sealing ring and the interstage cooling valve block, that is, after the coolant enters the compressor, one way flows to the cylinder head cooling channel, and the other way flows to the interstage cooling channel. The end point of the cylinder head coolant flow channel is connected to the cylinder coolant inlet, that is, the coolant enters the cylinder cooling channel after the circulation inside the cylinder head ends. The first-stage exhaust port, the second-stage intake and exhaust port, the third-stage intake and exhaust port, and the fourth-stage intake and exhaust port of the cylinder head are all connected to the interstage cooling valve block to realize the cooling of the interstage gas in the interstage cooling valve block and form a multi-stage compressed gas circuit. The coolant outlet flow channel of the cylinder is connected to the coolant outlet on the interstage cooling valve block through the transition flow channel inside the cylinder head, thereby realizing the coolant circulation of the cylinder head and the cylinder part. The gas flow channel and coolant flow channel connected between the cylinder head and the interstage cooling valve block are both surface-sealed through the sealing ring and the pressing force between the cylinder head and the interstage cooling valve block. The cooling design of the cylinder head not only solves the cooling problem of the cylinder head, but also provides a transition connection for the gas circuit and the coolant circuit.

[0007] The interstage cooling valve block is composed of four interstage cooling chambers, each of which contains two to three cooling units. The outer layer of each cooling unit is a coolant flow channel, which is an empty cavity between the outer wall of the gas-liquid flow channel separator tube of the interstage valve block and the inner wall of the interstage cooling valve block. The inner layer of each cooling unit is an interstage gas flow channel, which is an empty cavity wrapped by the inner wall of the gas-liquid flow channel separator tube of the interstage valve block, and the cavity is connected to the exhaust port and the air intake port of the front and rear compression chambers respectively. The inner and outer layers are separated by the gas-liquid flow channel separator tube of the interstage valve block. In order to increase the convective heat transfer coefficient and heat transfer area between the gas in the interstage cooling unit and the inner wall of the gas-liquid flow channel separator tube of the interstage valve block to achieve the purpose of enhanced heat transfer, a gas spoiler is designed inside the gas-liquid flow channel separator tube of the interstage valve block. The spoiler is in a spiral shape, which can prevent the gas flow in the interstage gas flow channel from laminar flow state and fully contact the inner wall of the gas-liquid flow channel separator tube of the interstage valve block. Similarly, in order to increase the convective heat transfer coefficient and heat exchange area between the coolant in the interstage cooling unit and the outer wall of the gas-liquid flow channel separator tube of the interstage valve block and the inner wall of the interstage cooling valve block to achieve the purpose of enhanced heat exchange, a liquid spoiler is designed between the outer part of the gas-liquid flow channel separator tube of the interstage valve block and the inner wall of the interstage cooling valve block. The spoiler is also spiral-shaped, which can prevent the coolant flow in the interstage coolant flow channel from laminar flow. A connecting flow channel is set between the coolant flow channels of each interstage cooling chamber to ensure the circulation of the coolant. Considering that the suction capacity of the first-stage compression chamber has an important influence on the exhaust volume of the multi-stage compressor, the first-stage suction capacity is closely related to the first-stage exhaust pressure, and at the same time ensures that the compressor output gas temperature is within the required range, and the suction pressure of the second-stage compression chamber affects the first-stage exhaust pressure and indirectly affects the suction capacity of the first-stage compression chamber. The coolant inside the interstage cooling valve block first enters the coolant flow channel of the first and second interstage cooling chambers through the compressor coolant inlet, and then enters the coolant flow channel of the fourth-stage rear cooling chamber through the connecting flow channel, and then enters the coolant flow channel of the second and third interstage cooling chambers through the connecting flow channel, and finally enters the coolant flow channel of the third and fourth interstage cooling chambers through the connecting flow channel. The coolant flows through the interstage chambers in turn and finally flows out through the compressor coolant outlet, forming a coolant circulation flow in the interstage cooling chamber. The interstage chamber gas cooling design inside the interstage cooling valve block provides a compact and feasible method for cooling multi-stage inclined plate compressors.

[0008] Based on the above design, a compact liquid cooling device for cooling the cylinder, cylinder head and interstage gas of a multi-stage swash plate compressor can be realized.

[0009] Preferably, the compressor housing, cylinder head and interstage cooling valve block can be manufactured by metal 3D printing technology, which can greatly reduce process holes, avoid the sealing design between the gas-liquid flow channels in the interstage cooling chamber, and thus reduce the overall structural size of the compressor;

[0010] Preferably, the number of layers of the coolant flow channel inside the cylinder head along the axial direction of the cylinder can be flexibly set according to the thickness of the cylinder head. The more layers there are, the better it is for improving the heat exchange effect and reducing the flow resistance.

[0011] The present invention is a compact multi-stage swash plate type compressor liquid cooling device, which makes full use of the structural characteristics of the compressor to realize the miniaturization of the compressor liquid cooling device. The spiral groove on the outer wall of the cylinder and the compressor housing form the coolant flow channel of the cylinder, which increases the contact area of ​​convective heat exchange and also serves the purpose of strengthening heat exchange; the cylinder head cooling part is mainly designed with a coolant flow channel inside the cylinder head without affecting the normal operation of the intake and exhaust valves. The coolant flow channel is connected with the cylinder coolant flow channel to realize the cooling cycle of the cylinder and the cylinder head; the gas cooling structure of the interstage chamber is integrated in the interstage cooling valve block, and the interstage cooling chamber is designed with inner and outer double-layer flow channels, the inner layer is the interstage gas flow channel, and the outer layer is the coolant flow channel. The inner and outer layers are separated by pipes, and spiral spoilers are designed in the inner and outer flow channels to achieve the purpose of strengthening heat exchange. Based on the present invention, the cylinder, cylinder head and gas in the interstage chamber of the swash plate type compressor can be cooled simultaneously under the premise of ensuring the compact cooling structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is described below in conjunction with the accompanying drawings.

[0013] Figure 1 is a general layout diagram of a compact multi-stage swash plate type compressor liquid cooling device according to one embodiment of the present invention;

[0014] Figure 2 is a schematic diagram of cylinder cooling according to one embodiment of the present invention;

[0015] Figure 3 is a schematic diagram of cylinder head cooling according to one embodiment of the present invention.

[0016] Figure 4 is a schematic diagram of gas cooling within an interstage chamber according to one embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following will describe in detail the specific implementation of the compact multi-stage swash plate compressor liquid cooling device of the present invention in conjunction with the accompanying drawings. It should be understood that the implementation described below is merely exemplary and not restrictive.

[0018] like Figure 1 to Figure 4As shown, the compact multi-stage swash plate compressor liquid cooling device comprises: a compressor housing 1, a first-stage cylinder 2, a first-stage cylinder spiral groove 3, a first-stage cylinder end seal 4, a first-stage cylinder tail seal 5, a second-stage cylinder 6, a second-stage cylinder spiral groove 7, a second-stage cylinder end seal 8, a second-stage cylinder tail seal 9, a third-stage cylinder 10, a third-stage cylinder spiral groove 11, a third-stage cylinder end seal 12, a third-stage cylinder tail seal 13, a fourth-stage cylinder 14, a fourth-stage cylinder spiral groove 15, a fourth-stage cylinder end seal Sealing ring 16, sealing ring at the tail of the fourth cylinder 17, cylinder coolant inlet flow channel 18, cylinder coolant inlet sealing ring 19, first and fourth cylinder coolant connecting flow channel 20, fourth and second cylinder coolant connecting flow channel 21, second and third cylinder coolant connecting flow channel 22, cylinder coolant outlet flow channel 23, cylinder coolant outlet sealing ring 24, cylinder head 25, cylinder coolant inlet 26, cylinder coolant outlet 27, cylinder head coolant inlet 28, cylinder head coolant flow channel 29, first air intake port 30, First-stage exhaust port 31, second-stage air intake port 32, second-stage exhaust port 33, third-stage air intake port 34, third-stage exhaust port 35, fourth-stage air intake port 36, fourth-stage exhaust port 37, interstage cooling valve block 38, first-stage exhaust port sealing ring 39, second-stage air intake port sealing ring 40, second-stage exhaust port sealing ring 41, third-stage air intake port sealing ring 42, third-stage exhaust port sealing ring 43, fourth-stage air intake port sealing ring 44, fourth-stage exhaust port sealing ring 45, cylinder head coolant inlet sealing ring 46, cylinder coolant outlet sealing ring 2 47, coolant inlet 48, coolant outlet 49, compressor exhaust port 50, interstage valve block gas flow channel spoiler 51, interstage valve block gas-liquid flow channel separator 52, interstage valve block coolant flow channel spoiler 53, first and second interstage coolant flow channels 54, first and second interstage gas flow channels 55, second and third interstage coolant flow channels 56, second and third interstage gas flow channels 57, third and fourth interstage coolant flow channels 58, third and fourth interstage gas flow channels 59, fourth stage post-coolant flow channel 60 and fourth stage post-gas flow channel 61.

[0019] like Figure 1 As shown, the compressor housing 1, the cylinder head 25, and the interstage cooling valve block 38 are connected together by screws. At the same time, the tightening force of the screws makes the compressor housing 1 and the cylinder head 25, the cylinder head 25 and the interstage cooling valve block 38 fit tightly, and also makes the joint surface between the compressor housing 1 and the cylinder head 25 and the connecting holes on the joint surface between the cylinder head 25 and the interstage cooling valve block 38 achieve end face sealing.

[0020] like Figure 2As shown, the first-stage cylinder 2 is placed in the compressor housing 1, and a first-stage cylinder coolant flow channel is formed between the first-stage cylinder spiral groove 3 and the compressor housing 1. The sealing between the first-stage cylinder spiral groove 3 and the compressor housing 1 is achieved by the first-stage cylinder end seal ring 4 and the first-stage cylinder tail seal ring 5 under the pressure of the cylinder head 25. The fourth-stage cylinder 14 is placed in the compressor housing 1, and a fourth-stage cylinder coolant flow channel is formed between the fourth-stage cylinder spiral groove 15 and the compressor housing 1. The sealing between the fourth-stage cylinder spiral groove 15 and the compressor housing 1 is achieved by the fourth-stage cylinder end seal ring 16 and the fourth-stage cylinder tail seal ring 17 under the pressure of the cylinder head 25. The second-stage cylinder 6 is placed in the compressor housing 1, and a second-stage cylinder coolant flow channel is formed between the second-stage cylinder spiral groove 7 and the compressor housing 1. The sealing between the second-stage cylinder spiral groove 7 and the compressor housing 1 is achieved by the second-stage cylinder end seal ring 8 and the second-stage cylinder tail seal ring 9 under the pressure of the cylinder head 25. The three-stage cylinder 10 is placed in the compressor housing 1, and a three-stage cylinder coolant flow channel is formed between the three-stage cylinder spiral groove 11 and the compressor housing 1. The sealing between the three-stage cylinder spiral groove 11 and the compressor housing 1 is achieved by the three-stage cylinder end sealing ring 12 and the three-stage cylinder tail sealing ring 13 under the compression of the cylinder head 25. The coolant from the cylinder head coolant flow channel 29 enters the first-stage cylinder spiral groove 3 through the cylinder coolant inlet 26 and the cylinder coolant inlet flow channel 18, then enters the fourth-stage cylinder spiral groove 15 through the first-stage cylinder coolant connecting flow channel 20, and then enters the second-stage cylinder spiral groove 7 through the fourth-stage cylinder coolant connecting flow channel 21, and then enters the third-stage cylinder spiral groove 11 through the second-stage cylinder coolant connecting flow channel 22, and finally enters the transition flow channel inside the cylinder head 25 through the cylinder coolant outlet flow channel 23 and the cylinder coolant outlet 27, and then flows to the coolant outlet 49 through the transition flow channel inside the interstage cooling valve block, thereby realizing the coolant circulation of the cylinder.

[0021] like Figure 3 and Figure 4As shown, the coolant flow channel inside the cylinder head 25 surrounds the intake and exhaust valves of each stage. The cylinder head coolant inlet 28 is directly connected to the compressor coolant inlet 48 through the cylinder head coolant inlet sealing ring 46, the extrusion and bonding between the interstage cooling valve block 38 and the cylinder head 25, and the transition flow channel inside the interstage cooling valve block 38. The end of the cylinder head coolant flow channel 29 is connected to the cylinder coolant inlet 26, and the end face is sealed through the cylinder coolant inlet sealing ring 19 and the extrusion and bonding between the compressor housing 1 and the cylinder head 25. One end of the cylinder coolant outflow transition flow channel inside the cylinder head 25 is connected to the cylinder coolant outlet 27 through the cylinder coolant outlet sealing ring 24, and the other end is connected to the transition flow channel inside the interstage cooling valve block 38 through the cylinder coolant outlet sealing ring 24 and then connected to the coolant outlet 49. The first-stage exhaust port 31, the second-stage air intake port 32, the second-stage exhaust port 33, the third-stage air intake port 34, the third-stage exhaust port 35, the fourth-stage air intake port 36, and the fourth-stage exhaust port 37 inside the cylinder head are respectively connected with the inlet of the first-stage and second-stage interstage gas flow channel 55, the outlet of the first-stage and second-stage interstage gas flow channel 55, the inlet of the second-stage and third-stage interstage gas flow channel 57, the outlet of the second-stage and third-stage interstage gas flow channel 57, the inlet of the third-stage and fourth-stage interstage gas flow channel 59, the outlet of the third-stage and fourth-stage interstage gas flow channel 59, and the inlet of the fourth-stage post-gas flow channel 61 inside the interstage cooling valve block 38, and the end face sealing is achieved at the joint surface of the cylinder head 25 and the interstage cooling valve block 38 by the first-stage exhaust port sealing ring 39, the second-stage air intake port sealing ring 40, the second-stage exhaust port sealing ring 41, the third-stage air intake port sealing ring 42, the third-stage exhaust port sealing ring 43, the fourth-stage air intake port sealing ring 44, and the fourth-stage exhaust port sealing ring 45. The gas flow channel and liquid flow channel inside the cylinder head 25 are important transition circuits for the cylinder coolant circulation and the multi-stage compressed gas circuit.

[0022] like Figure 4As shown, the interstage chamber cooling is integrated inside the interstage cooling valve block 38. The first and second interstage chamber cooling channels include three cooling units, the outer layer flow channel of the cooling unit is the first and second interstage coolant flow channel 54, and the inner layer flow channel is the first and second interstage gas flow channel 55. The second and third interstage chamber cooling channels include three cooling units, the outer layer flow channel of the cooling unit is the second and third interstage coolant flow channel 56, and the inner layer flow channel is the second and third interstage gas flow channel 57. The third and fourth interstage chamber cooling channels include two cooling units, the outer layer flow channel of the cooling unit is the third and fourth interstage coolant flow channel 58, and the inner layer flow channel is the third and fourth interstage gas flow channel 59. The fourth stage rear chamber cooling channel includes three cooling units, the outer layer flow channel of the cooling unit is the fourth stage rear coolant flow channel 60, and the inner layer flow channel is the fourth stage rear gas flow channel 61. The inner gas flow channel of each cooling unit is provided with an interstage valve block gas flow channel spoiler 51, and the outer coolant flow channel is provided with an interstage valve block coolant flow channel spoiler 53 to enhance the heat exchange effect. The inner and outer flow channels are separated by the interstage valve block gas-liquid flow channel separator 52. Multiple cooling units of a certain interstage chamber cooling channel are connected in parallel, that is, the outer coolant flow channels are connected in parallel and the inner gas flow channels are connected in parallel to reduce the flow resistance of the fluid. The coolant flows into the interstage cooling valve block 38 from the coolant inlet 48 and is divided into two paths, one flows to the cylinder head 25, and the other flows to the first and second interstage coolant flow channels 54, then flows to the second and third interstage coolant flow channels 56, and then flows to the third and fourth interstage coolant flow channels 58, and finally enters the fourth post-coolant flow channel 60 and finally flows out of the interstage cooling valve block 38 through the coolant 49. The gas discharged from the fourth-stage compression chamber is cooled by the fourth-stage post-gas flow channel 61 and then discharged from the compressor exhaust port 50 .

[0023] Based on this disclosure, many variations in the configuration and operational sequence of the illustrated and described features will be apparent to those skilled in the art. Therefore, it should be appreciated that various changes can be made to this patent without departing from the spirit and scope of the claimed subject matter.

Claims

1. A compact multi-stage swash plate type compressor liquid cooling device, characterized in that: include: The invention comprises a compressor housing (1), a first-stage cylinder (2), a first-stage cylinder spiral groove (3), a first-stage cylinder end sealing ring (4), a first-stage cylinder tail sealing ring (5), a second-stage cylinder (6), a second-stage cylinder spiral groove (7), a second-stage cylinder end sealing ring (8), a second-stage cylinder tail sealing ring (9), a third-stage cylinder (10), a third-stage cylinder spiral groove (11), a third-stage cylinder end sealing ring (12), a third-stage cylinder tail sealing ring (13), a fourth-stage cylinder (14), a fourth-stage cylinder spiral groove (15), a fourth-stage cylinder end sealing ring (16), a fourth-stage cylinder tail sealing ring (17), a cylinder coolant inlet flow channel (1 8), a cylinder coolant inlet sealing ring (19), a first-stage cylinder coolant connecting flow channel (20), a second-stage cylinder coolant connecting flow channel (21), a second-stage cylinder coolant connecting flow channel (22), a cylinder coolant outlet flow channel (23), a cylinder coolant outlet sealing ring (24), a cylinder coolant inlet (26), a cylinder coolant outlet (27), a cylinder head coolant inlet (28), a cylinder head coolant flow channel (29) inside the cylinder head (25), an interstage cooling valve block (38), a coolant inlet (48) and a coolant outlet (49), etc., and a cylinder and cylinder head coolant circulation flow channel, which is composed of a a first-stage air intake port (30), a first-stage exhaust port (31), a second-stage air intake port (32), a second-stage exhaust port (33), a third-stage air intake port (34), a third-stage exhaust port (35), a fourth-stage air intake port (36), a fourth-stage exhaust port (37), an interstage cooling valve block (38), a first-stage exhaust port sealing ring (39), a second-stage air intake port sealing ring (40), a second-stage exhaust port sealing ring (41), a third-stage air intake port sealing ring (42), a third-stage exhaust port sealing ring (43), a fourth-stage air intake port sealing ring (44), a fourth-stage exhaust port sealing ring (45), a cylinder head coolant inlet sealing ring (46), a cylinder coolant outlet sealing ring (2) An interstage gas cooling part including: a cooling liquid inlet (47), a cooling liquid outlet (49), a compressor exhaust port (50), an interstage valve block gas flow channel spoiler (51), an interstage valve block gas-liquid flow channel separator (52), an interstage valve block cooling liquid flow channel spoiler (53), first and second interstage cooling liquid flow channels (54), first and second interstage gas flow channels (55), second and third interstage cooling liquid flow channels (56), second and third interstage gas flow channels (57), third and fourth interstage cooling liquid flow channels (58), third and fourth interstage gas flow channels (59), fourth post-stage cooling liquid flow channels (60), and fourth post-stage gas flow channels (61); The coolant flow channel of the cooling part of the first-stage cylinder (2) is a cavity formed between the first-stage cylinder spiral groove (3) and the compressor housing (1); the coolant flow channel of the cooling part of the second-stage cylinder (6) is a cavity formed between the second-stage cylinder spiral groove (7) and the compressor housing (1); the coolant flow channel of the cooling part of the third-stage cylinder (10) is a cavity formed between the third-stage cylinder spiral groove (11) and the compressor housing (1); the coolant flow channel of the cooling part of the fourth-stage cylinder (14) is a cavity formed between the fourth-stage cylinder spiral groove (15) and the compressor housing (1); the sealing of the chambers between the spiral grooves of each stage of the cylinder and the compressor housing (1) is achieved by the first-stage cylinder end sealing ring (4), the first-stage cylinder tail sealing ring (5), the second-stage cylinder end sealing ring (8), the second-stage cylinder tail sealing ring (9), the third-stage cylinder end sealing ring (12), the third-stage cylinder tail sealing ring (13), the fourth-stage cylinder end sealing ring (16), The four-stage cylinder tail sealing ring (17) is used to realize that the coolant flow channels of each stage of the cylinder are connected through a four-stage cylinder coolant connecting flow channel (20), a four-stage cylinder coolant connecting flow channel (21), and a second-stage cylinder coolant connecting flow channel (22). This design can realize cooling of each stage of the cylinder without adding other structures, and the spiral flow channel can enhance the convective heat exchange effect. The coolant flow path of the cylinder cooling part is: the coolant enters the first-stage cylinder spiral groove (3) from the cylinder coolant inlet flow channel (18), enters the fourth-stage cylinder spiral groove (15) through a four-stage cylinder coolant connecting flow channel (20), enters the second-stage cylinder spiral groove (7) through the four-stage cylinder coolant connecting flow channel (21), enters the third-stage cylinder spiral groove (11) through the second-stage cylinder coolant connecting flow channel (22), and finally is discharged through the cylinder coolant outlet flow channel (23), the cylinder coolant outlet (27), and the coolant outlet (49). The number of layers of the cylinder head coolant flow channel (29) of the cooling part of the cylinder head (25) along the cylinder axis direction can be flexibly adjusted according to the thickness of the cylinder head to optimize the heat exchange effect and coolant flow resistance. At the same time, the coolant flow channel in the cylinder head (25) and the various inlet and exhaust flow channels provide a transition connection for the cylinder coolant circuit and the multi-stage compressed gas circuit. The interstage gas cooling channel adopts an inner and outer double-layer fluid channel design and is integrated inside the interstage cooling valve block (38), wherein the inner layer flow channel is the gas flow channel in the interstage chamber, and the outer layer is the coolant flow channel, and the inner and outer layer flow channels are separated by an interstage valve block gas-liquid flow channel separator (52), and the inner and outer layer flow channels are respectively provided with an interstage valve block gas flow channel spoiler (51) and an interstage valve block coolant flow channel spoiler (53) to enhance the convective heat transfer effect; the coolant flow path of the interstage gas cooling part is: the coolant first enters the first and second interstage coolant flow channels (54) from the compressor coolant inlet (48), and then passes through the fourth stage post-coolant flow channel (60), the second and third stage interstage coolant flow channels (56) and the third and fourth stage interstage coolant flow channels (58) in sequence, and finally flows out through the compressor coolant outlet (49).

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