Upper cylinder cover, rotor pump and compressor

Abstract

The invention relates to the technical field of compressors, and provides an upper cylinder cover, a rotor pump and a compressor. The upper cylinder cover comprises a cover body, an outer cover and an elastic sealing piece; the cover body comprises a cover plate and a shaft sleeve, and the shaft sleeve is connected to the first side face of the cover plate. The outer cover is provided with an inner cavity, the outer cover is provided with a first opening and a second opening which are opposite to each other in one direction, the outer cover is connected to the cover plate, the first side face seals the first opening, the second opening allows the shaft sleeve to penetrate through, and a first through hole communicated with the inner cavity is formed in the cover plate; the shaft sleeve is sleeved with the elastic sealing piece, the inner circumferential face of the elastic sealing piece is matched with the outer circumferential face of the shaft sleeve in a sealed mode, a sealing groove is formed in the outer circumferential face of the elastic sealing piece, and the edge of the second opening is inserted into the sealing groove in a sealed mode. The impact phenomenon of the upper cylinder cover can be improved, and the sealing performance of the upper cylinder cover is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to an upper cylinder head, a rotary pump, and a compressor. Background Technology

[0002] Rotary compressors are now widely used in household appliances such as refrigerators and air conditioners, and large and medium-sized rolling rotary compressors are also used in cold storage.

[0003] Some compressors, based on their usage requirements, need to discharge air from one side of the pump body, such as the lower end cover of the pump body. In this case, the upper end cover needs to be sealed. Since the air discharge is located on one side of the pump body, the two end covers of the pump body are subjected to uneven force.

[0004] Furthermore, the sealing of the compressor pump body is a key factor affecting the compressor's efficiency, safety, lifespan, and environmental performance. Existing pump bodies typically focus on the seal between the upper end cover and the cylinder block. However, due to uneven stress on the upper and lower end covers, the upper end cover is subjected to impacts, posing a significant challenge to the seal between it and the cylinder block. Prolonged impacts on the upper end cover can easily lead to poor sealing between the upper cylinder head and the cylinder block, resulting in internal gas leakage. This deteriorates the stability of the upper and lower cylinder heads and the exhaust valve plates, causing internal pressure instability in the compressor and resulting in additional energy loss.

[0005] Based on the above-mentioned technical problems, the present invention requires an upper cylinder head, a rotary pump, and a compressor to improve the impact phenomenon of the upper cylinder head and ensure the sealing performance of the upper cylinder head. Summary of the Invention

[0006] The purpose of this invention is to provide an upper cylinder head, a rotary pump, and a compressor to improve the impact phenomenon of the upper cylinder head and ensure the sealing performance of the upper cylinder head.

[0007] The upper cylinder cover of the present invention includes: a cover body, an outer cover, and an elastic sealing element;

[0008] The cover includes a cover plate and a bushing. The bushing is connected to a first side of the cover plate, and the bushing has a first mounting cavity for cooperating with a rotating shaft. The first mounting cavity communicates with the cover plate.

[0009] The outer cover has an inner cavity, and the outer cover has a first opening and a second opening opposite each other along one direction. The outer cover is connected to the cover plate, and the first side seals the first opening. The second opening allows the bushing to pass through. The cover plate has a first through hole communicating with the inner cavity.

[0010] The elastic seal is fitted over the bushing, and the inner circumferential surface of the elastic seal is sealed to the outer circumferential surface of the bushing. A sealing groove is provided on the outer circumferential surface of the elastic seal, and the edge of the second opening is sealed and inserted into the sealing groove.

[0011] Optionally, the inner circumferential surface of the first mounting cavity is provided with a spiral-shaped first oil groove.

[0012] Optionally, the inner circumferential surface of the elastic seal is interference-fitted with the outer circumferential surface of the bushing.

[0013] Optionally, the bottom of the sealing groove is interference-fitted with the inner circumferential surface of the second opening.

[0014] Optionally, the dimension of the sealing groove along the axial direction of the bushing is greater than the wall thickness at the edge of the second opening.

[0015] Optionally, the depth of the sealing groove is greater than half the wall thickness of the elastic seal.

[0016] The present invention also provides a rotor pump, including a cylinder body and the upper cylinder cover described above, wherein the cover plate is sealed to an open end of the cylinder body on the side opposite to the first side, and the first through hole communicates with the compression chamber of the cylinder body.

[0017] Optionally, the rotary pump further includes a lower cylinder head assembly;

[0018] The lower cylinder head assembly includes a lower cylinder head and a sealing end plate. The lower cylinder head is sealed to the other open end of the cylinder body. A groove is provided on the side of the lower cylinder head away from the cylinder body. A second through hole and a third through hole are provided on the lower cylinder head. The second through hole connects the groove and the compression chamber of the cylinder body. One end of the third through hole communicates with the groove, and the other end communicates with the outer peripheral surface of the lower cylinder head. The sealing end plate covers the side of the lower cylinder head away from the cylinder body and seals the groove.

[0019] Optionally, the groove is an annular groove around the central axis of the bushing;

[0020] And / or, the lower cylinder head is provided with a second mounting cavity for mounting a rotating shaft in the middle, and a spiral second oil groove is provided in the second mounting cavity.

[0021] And / or, the third through hole is opened radially.

[0022] The present invention also provides a compressor, including the aforementioned housing, heat exchange device, and the aforementioned rotor pump, wherein the rotor pump is disposed within the housing, and the heat exchange device is provided with a hot path and a cold path, wherein cooling water flows through the cold path;

[0023] The housing is provided with a first air inlet, a second air inlet, a first air outlet, and a second air outlet;

[0024] The first air inlet is connected to the intake chamber of the cylinder, and the refrigerant outside the housing enters through the first air inlet;

[0025] One end of the second air inlet is connected to the heat path outlet of the heat exchange device, and the other end is connected to the inside of the housing;

[0026] The first air outlet is connected to the third through hole and to the heat inlet of the heat exchange device;

[0027] The refrigerant inside the casing is discharged from the second air outlet.

[0028] In the aforementioned upper cylinder head configuration, the first opening of the inner cavity of the outer cover is sealed by a cover plate, and the second opening of the inner cavity of the outer cover is sealed to the bushing by an elastic seal, thus forming a closed structure within the inner cavity of the outer cover. Since the inner cavity of the outer cover communicates with the first through-hole, which in turn communicates with the compression chamber of the rotor pump, the gas in the compression chamber of the rotor pump can enter the inner cavity of the outer cover through the first through-hole to form a buffer, thereby reducing the impact on the cover and lowering operating noise. This improves the sealing between the cover and the cylinder body caused by impact, thereby reducing the probability of gas leakage inside the pump body, ensuring the stability of the upper cylinder head, lower cylinder head, and exhaust valve plate, ensuring stable internal pressure of the compressor, preventing additional energy loss, and improving energy utilization.

[0029] Furthermore, a flexible seal is formed between the second opening of the outer casing and the bushing through an elastic seal. The outer circumferential surface of the elastic seal has a sealing groove for the edge sealing insertion of the second opening, ensuring a good sealing effect. Simultaneously, it limits axial displacement of the elastic seal caused by vibration, improving sealing effectiveness and stability. The aforementioned fit between the elastic seal and the second opening also helps reduce the machining precision requirements of the outer casing, thereby reducing machining difficulty. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a compressor according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the cover according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the outer cover according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the lower cylinder head assembly according to an embodiment of the present invention.

[0034] In the attached diagram:

[0035] 10-Cover body; 11-Cover plate; 111-First side surface; 112-First through hole; 12-Shaft sleeve; 121-First mounting cavity; 122-First oil groove;

[0036] 20 - Outer cover; 21 - First opening; 22 - Second opening; 23 - Inner cavity;

[0037] 30 - Elastic seal; 31 - Sealing groove;

[0038] 40 - Cylinder block; 41 - Shaft;

[0039] 50 - Lower cylinder head assembly; 51 - Lower cylinder head; 511 - Groove; 512 - Second through hole; 513 - Third through hole; 514 - Second mounting cavity; 515 - Second oil groove; 52 - Sealing end plate;

[0040] 60 - Housing; 61 - First air inlet; 62 - Second air inlet; 63 - First air outlet; 64 - Second air outlet;

[0041] 70 - Heat exchange device;

[0042] 80-Motor;

[0043] 90-Buffer tank. Detailed Implementation

[0044] The upper cylinder head proposed in this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this invention.

[0045] As used in this invention, the singular forms “a,” “an,” and “the” include plural objects; the term “or” is generally used to mean “and / or”; the term “a number” is generally used to mean “at least one”; and the terms “at least two” or “more than” are generally used to mean “two or more”. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature. Additionally, as used in this invention, “installed,” “connected,” “linked,” and “set” on one element from another should be interpreted broadly, generally indicating only a connection, coupling, mating, or transmission relationship between the two elements, which can be direct or indirect through an intermediate element. This connection, coupling, mating, or transmission should not be construed as indicating or implying a spatial positional relationship between the two elements, i.e., one element can be located arbitrarily inside, outside, above, below, or to one side of another element, unless otherwise explicitly stated. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances. Furthermore, directional terms such as above, below, up, down, upward, downward, left, right, etc., are used relative to exemplary embodiments as shown in the figures, with upward or up direction pointing towards the top of the corresponding figure, and downward or down direction pointing towards the bottom of the corresponding figure.

[0046] Combination Figure 1 As shown, this embodiment takes a compressor as an example, which is equipped with a rotor pump, and the rotor pump includes an upper cylinder head.

[0047] The upper cylinder head includes: a cover body 10, an outer cover 20, and an elastic seal 30;

[0048] Combination Figure 1 and Figure 2 As shown, the cover 10 includes a cover plate 11 and a bushing 12.

[0049] The cover plate 11 has a plate structure, and the bushing 12 has a cylindrical structure. The bushing 12 is connected to the first side 111 of the cover plate 11. Figure 1 The bushing 12 and the cover plate 11 are integrally formed on the upper side of the bushing 12. The bushing 12 has a first mounting cavity 121 for cooperating with the rotating shaft 41 of the compressor. The first mounting cavity 121 is a cylindrical cavity with the same outer diameter as the rotating shaft 41. The first mounting cavity 121 is connected to the lower end of the cover plate 11.

[0050] Combination Figure 3 As shown, the outer cover 20 has an inner cavity 23, and the outer cover 20 is along one direction ( Figure 3 (In the vertical direction) it has a first opening 21 and a second opening 22.

[0051] The first opening 21 is located at Figure 3 The lower end of the outer cover 20, the second opening 22 is located at Figure 3 The upper end of the outer cover 20, and the first opening 21 is larger than the second opening 22.

[0052] Combination Figures 1 to 3 As shown, the outer cover 20 is connected to the cover plate 11 of the cover body 10, and the first side surface 111 seals the first opening 21. Specifically, the edge of the first opening 21 has a horizontally extending extension, and a plurality of connecting holes are provided on the extension. The outer cover 20 is connected to the cover plate 11 by bolts passing through the connecting holes, and a sealing ring can be provided at the joint surface between the outer cover 20 and the first side surface 111 to form a seal.

[0053] The second opening 22 allows the bushing 12 to pass through, and the cover plate 11 has a first through hole 112 that communicates with the inner cavity 23 of the outer cover 20.

[0054] The rotor pump also includes a cylinder body 40, and the cover plate 11 is sealed to an open end of the cylinder body 40 on the side opposite to the first side 111. Figure 1 The upper opening end of the cylinder body 40 (in the cylinder). Specifically, the cover plate 11 is bolted to the upper end of the cylinder body 40, and a sealing ring can be provided between the cover plate 11 and the upper end of the cylinder body 40 to form a seal. The first through hole 112 communicates with the compression chamber of the cylinder body 40.

[0055] In addition, the rotary pump also includes blades and a rotor, which are disposed in the inner cavity of the cylinder 40. The rotor is driven by the rotating shaft 41, and the rotating shaft 41 drives the rotor to rotate. The outer circumferential surface of the rotor is always in contact with the end of the blades. The blades can move radially along the inner cavity of the cylinder 40. The blades and rotor divide the inner cavity of the rotary pump into a compression chamber and an intake chamber. As the rotor rotates, the volume of the compression chamber and the intake chamber changes to achieve the purpose of drawing in and discharging refrigerant. The compression chamber is the high-pressure side of the rotary pump, and the intake chamber is the low-pressure side of the rotary pump. The arrangement and structure of the blades and rotor in the rotary pump are existing technologies and will not be described in detail here.

[0056] The above configuration allows the gas in the compression chamber of the rotor pump to enter the inner cavity 23 of the outer casing 20 through the first through hole 112 to form a buffer.

[0057] Combination Figures 1 to 3 As shown, the elastic seal 30 has a circular structure and is sleeved on the bushing 12. The upper outer circumference of the bushing 12 has a tapered structure that is smaller at the top and larger at the bottom to facilitate the installation of the elastic seal 30.

[0058] In this embodiment, the elastic seal 30 is made of high-temperature resistant rubber. In other alternative embodiments, the elastic seal 30 may be made of other existing elastic materials.

[0059] The inner circumferential surface of the elastic seal 30 is press-fitted with the outer circumferential surface of the bushing 12. A sealing groove 31 is provided on the outer circumferential surface of the elastic seal 30. The sealing groove 31 extends along the circumference of the elastic seal 30 to form a closed loop structure. The edge of the second opening 22 is sealed and inserted into the sealing groove 31.

[0060] Specifically, the bottom of the sealing groove 31 is interference-fitted with the inner circumferential surface of the second opening 22. The inner circumferential surface of the second opening 22 presses against the bottom of the sealing groove 31, causing the elastic seal 30 to deform. At the same time, the inner circumferential surface of the elastic seal 30 is pressed against the outer circumferential surface of the bushing 12, thereby forming a seal between the elastic seal 30 and the second opening 22.

[0061] In the aforementioned upper cylinder head configuration, the first opening 21 of the inner cavity 23 of the outer cover 20 is sealed by the cover plate 11, and the second opening 22 of the inner cavity 23 of the outer cover 20 is sealed to the bushing 12 by an elastic seal 30, thus forming a closed structure for the inner cavity 23 of the outer cover 20. Since the inner cavity 23 of the outer cover 20 communicates with the first through hole 112, which in turn communicates with the compression chamber of the rotor pump, the gas in the compression chamber of the rotor pump can enter the inner cavity 23 of the outer cover 20 through the first through hole 112 to form a buffer, thereby reducing the impact on the cover 10 and lowering operating noise. This improves the sealing between the cover 10 and the cylinder body caused by impact, thereby reducing the probability of gas leakage inside the pump body, ensuring the stability of the upper cylinder head, lower cylinder head, and exhaust valve plate, ensuring stable internal pressure of the compressor, preventing additional energy loss, and improving energy utilization.

[0062] Furthermore, a flexible seal is formed between the second opening 22 of the outer cover 20 and the bushing 12 through an elastic seal 30. A sealing groove 31 is provided on the outer circumferential surface of the elastic seal 30 for the edge sealing insertion of the second opening 22, ensuring a good sealing effect. Simultaneously, it can limit the axial displacement of the elastic seal 30 caused by vibration, improving the sealing effect and sealing stability. The aforementioned cooperation method between the elastic seal 30 and the second opening 22 also helps to reduce the machining accuracy requirements of the outer cover 20, thereby reducing the machining difficulty.

[0063] Combination Figure 1 and Figure 2As shown, in this embodiment, a spiral-shaped first oil groove 122 is provided on the inner circumferential surface of the first mounting cavity 121. The first oil groove 122 is used to supply lubricating fluid, which facilitates the lubricating fluid to fill between the inner circumferential surface of the first mounting cavity 121 and the outer circumferential surface of the rotating shaft 41. On the one hand, this achieves a better lubrication effect, and on the other hand, it facilitates the formation of an oil seal between the inner circumferential surface of the first mounting cavity 121 and the outer circumferential surface of the rotating shaft 41, thus forming a good seal between the two to prevent gas leakage.

[0064] Furthermore, the sealing groove 31 is along the axial direction of the bushing 12 ( Figure 2 The vertical dimension of the sealing groove 31 is greater than the wall thickness at the edge of the second opening 22. That is, the width of the sealing groove 31 is greater than the wall thickness at the edge of the second opening 22, so that the relative position of the elastic seal 30 and the outer cover 20 along the width direction of the sealing groove 31 can be finely adjusted.

[0065] The depth of the sealing groove 31 is greater than half the wall thickness of the elastic seal 30, which can ensure the depth of insertion of the edge of the second opening 22 into the sealing groove 31 and ensure the stability of the assembly of the outer cover 20 and the elastic seal 30.

[0066] Combination Figure 1 and Figure 4 As shown, the rotor pump also includes a lower cylinder head assembly 50, which is sealed to the other open end of the cylinder body 40. Figure 1 (The lower opening end of the cylinder block 40).

[0067] Combination Figure 4 As shown, the lower cylinder head assembly 50 includes a lower cylinder head 51 and a sealing end plate 52. The lower cylinder head 51 is sealed to the lower opening end of the cylinder body 40. Specifically, the lower cylinder head 51 has a connecting hole, and the lower cylinder head 51 is sealed to the lower opening end of the cylinder body 40 by bolts passing through the connecting hole. A sealing ring can be provided between the lower cylinder head 51 and the cylinder body 40 to ensure its sealing performance.

[0068] like Figure 4 As shown, a second mounting cavity 514 for mounting a rotating shaft is provided in the middle of the lower cylinder head 51, and a spiral second oil groove 515 is provided in the second mounting cavity 514. The second mounting cavity 514 is a cylindrical cavity with the same outer diameter as the rotating shaft 41, and the second mounting cavity 514 extends through the upper and lower ends of the lower cylinder head 51.

[0069] The second oil groove 515 is used to supply lubricant, which facilitates the lubricant to fill between the inner circumferential surface of the second mounting cavity 514 and the outer circumferential surface of the rotating shaft 41. On the one hand, it can achieve a better lubrication effect, and on the other hand, it can facilitate the formation of an oil seal between the inner circumferential surface of the second mounting cavity 514 and the outer circumferential surface of the rotating shaft 41, so that a good seal is formed between the two to prevent gas leakage.

[0070] In this embodiment, the sealing end plate 52 is an integral plate structure that seals the lower opening end of the second mounting cavity 514. This configuration is suitable for scenarios where the rotating shaft 41 does not extend out of the second mounting cavity 514. In other alternative embodiments, if the rotating shaft 41 extends downward out of the second mounting cavity 514, a through hole for the rotating shaft 41 to pass through can be provided on the sealing end plate 52, and a sealing element can be added between the rotating shaft and the through hole to ensure a seal.

[0071] The lower cylinder head 51 is located on the side away from the cylinder body 40. Figure 4 The lower end of the cylinder 40 is provided with a groove 511.

[0072] like Figure 4 As shown, in this embodiment, the groove 511 is an annular groove surrounding the central axis of the second mounting cavity 514.

[0073] Since one end of the rotating shaft 41 is installed in the first mounting cavity 121 and the other end is installed in the second mounting cavity 514, the bushing 12, the rotating shaft 41, the first mounting cavity 121 and the second mounting cavity 514 are coaxially arranged. Therefore, the groove 511 is also substantially around the central axis of the bushing 12, and the central axis of the groove 511 is collinear with the central axis of the bushing 12.

[0074] The lower cylinder head 51 is provided with a second through hole 512 and a third through hole 513, the second through hole 512 being along the axial direction of the second mounting cavity 514. Figure 4 The second through hole 512 is opened in the vertical direction. One end of the second through hole 512 is connected to the groove 511, and the other end is connected to the compression chamber of the cylinder body 40. The third through hole 513 is opened in the radial direction. One end of the third through hole 513 is connected to the groove 511, and the other end is connected to the outer peripheral surface of the lower cylinder cover 51.

[0075] The sealing end plate 52 covers the lower cylinder cover 51 on the side away from the cylinder body 40. Figure 4 The lower end of the cylinder body 40 is sealed, and the groove 511 is sealed. The sealing end plate 52 can be bolted to the lower cylinder cover 51, and a sealing ring can be added between the sealing end plate 52 and the lower cylinder cover 51 to ensure its sealing effect.

[0076] The aforementioned lower cylinder head assembly 50 is configured such that the gas in the compression chamber of the lower cylinder head 51 can enter the groove 511 through the second through hole 512 to form a buffer, thereby reducing the impact on the lower cylinder head 51, and then be discharged through the third through hole 513.

[0077] By configuring the upper and lower cylinder head assemblies, the gas in the compression chamber of the lower cylinder head 51 can enter the inner cavity 23 of the outer cover 20 of the upper cylinder head from the top, and enter the groove 511 of the lower cylinder head 51 from the bottom, so that the two ends of the rotor pump are buffered, so that the two ends of the rotor pump are evenly stressed, reducing impact vibration, and improving the gas leakage caused by poor sealing due to vibration.

[0078] In this embodiment, a second through hole 512 is provided. In other alternative embodiments, multiple second through holes 512 may be provided and evenly distributed circumferentially around the central axis of the second mounting cavity 514. Similarly, in the upper cylinder head, multiple first through holes 112 may also be provided and evenly distributed circumferentially around the central axis of the bushing 12.

[0079] Please continue to refer to this. Figure 1 As shown, in this embodiment, the compressor also includes the housing 60, the heat exchange device 70, the motor 80, and the buffer tank 90. ​​The rotor pump and the motor 80 are disposed inside the housing 60. The heat exchange device 70 is provided with a hot path and a cold path, and cooling water flows through the cold path.

[0080] The housing 60 has a cylindrical structure and is provided with a first air inlet 61, a second air inlet 62, a first air outlet 63 and a second air outlet 64.

[0081] The first air inlet 61 is connected to the intake chamber of the cylinder 40. In addition, the first air inlet 61 is connected to the outlet of the buffer tank 90, so that the refrigerant outside the housing 60 enters from the first air inlet 61.

[0082] like Figure 1 As shown, in this embodiment, the cylinder 40 is a dual-cylinder structure, so it is provided with two first air inlets 61, and both first air inlets 61 are connected to the air outlet of the buffer tank 90.

[0083] One end of the second air inlet 62 is connected to the heat outlet of the heat exchange device 70, and the other end is connected to the inside of the housing.

[0084] The third through hole 513 is connected to the first air outlet 63, and the first air outlet 63 is connected to the hot path inlet of the heat exchange device 70. The heat exchange device 70 can be a plate radiator or other existing heat exchange structure. The heat exchange device 70 has a cold path and a hot path. The cold path is used to introduce refrigerant, and the hot path is used to introduce gas compressed by the rotor pump. The hot path and the cold path are adjacent to each other to achieve heat exchange, so as to reduce the temperature of the gas in the hot path.

[0085] The second air outlet 64 is connected to the second air inlet 62 so that the refrigerant inside the housing is discharged from the second air outlet 64.

[0086] In the above configuration, the gas in the buffer tank 90 enters the intake chamber of the cylinder 40 through the first air inlet 61. As the rotor rotates, the gas is compressed into the compression chamber and flows sequentially through the second through hole 512, the groove 511, and the third through hole 513 to the first air outlet 63. From there, it flows into the hot path inlet of the heat exchange device 70. Furthermore, the heat exchange device 70 has a cold path, through which a refrigerant is introduced to exchange heat with the hot path. This cools the gas in the hot path, causing it to flow back into the housing 60 through the second air inlet 62 to cool the internal components before being discharged to the load end through the second air outlet 64.

[0087] Please continue to refer to this. Figure 1 As shown, in this embodiment, the motor 80 is located above the rotor pump, and the output shaft of the motor 80 is driven by the rotating shaft 41, so that the motor 80 drives the rotating shaft 41 to rotate. Preferably, the passage between the second air inlet 62 and the second air outlet 64 passes through the motor 80 (for example, through the inside of the motor 80 or adjacent to the motor 80) to cool the motor 80 before discharging.

[0088] This method can improve the phenomenon of overheating of internal components of the housing 60 caused by direct discharge of compressed gas.

[0089] In this embodiment, the structure of the housing 60, the assembly method of the motor 80 and the rotor pump, the method of installing the motor 80 in the housing 60, and the method of installing the rotor pump in the housing 60 are all consistent with the existing compressor, and will not be described again here.

[0090] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0091] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. An upper cylinder head, characterized in that, include: Cover, outer cover, and resilient seals; The cover includes a cover plate and a bushing. The bushing is connected to a first side of the cover plate, and the bushing has a first mounting cavity for cooperating with a rotating shaft. The first mounting cavity communicates with the cover plate. The outer cover has an inner cavity, and the outer cover has a first opening and a second opening opposite each other along one direction. The outer cover is connected to the cover plate, and the first side seals the first opening. The second opening allows the bushing to pass through, and the cover plate has a first through hole communicating with the inner cavity. The elastic seal is fitted over the bushing, and the inner circumferential surface of the elastic seal is sealed to the outer circumferential surface of the bushing. A sealing groove is provided on the outer circumferential surface of the elastic seal, and the edge of the second opening is sealed and inserted into the sealing groove.

2. The upper cylinder head as described in claim 1, characterized in that, The inner circumferential surface of the first mounting cavity is provided with a spiral-shaped first oil groove.

3. The upper cylinder head as described in claim 1, characterized in that, The inner circumferential surface of the elastic seal is interference-fitted with the outer circumferential surface of the bushing.

4. The upper cylinder head as described in claim 1, characterized in that, The bottom of the sealing groove is interference-fitted with the inner circumferential surface of the second opening.

5. The upper cylinder head as described in claim 1, characterized in that, The dimension of the sealing groove along the axial direction of the bushing is greater than the wall thickness at the edge of the second opening.

6. The upper cylinder head as described in claim 1, characterized in that, The depth of the sealing groove is greater than half the wall thickness of the elastic seal.

7. A rotary pump, characterized in that, The cylinder includes a cylinder body and an upper cylinder cover as described in any one of claims 1 to 6, wherein the cover plate is sealed to an open end of the cylinder body on the side opposite to the first side, and the first through hole communicates with the compression chamber of the cylinder body.

8. The rotor pump as described in claim 7, characterized in that, The rotary pump also includes a lower cylinder head assembly; The lower cylinder head assembly includes a lower cylinder head and a sealing end plate. The lower cylinder head is sealed to the other open end of the cylinder body. A groove is provided on the side of the lower cylinder head away from the cylinder body. A second through hole and a third through hole are provided on the lower cylinder head. The second through hole connects the groove and the compression chamber of the cylinder body. One end of the third through hole communicates with the groove, and the other end communicates with the outer peripheral surface of the lower cylinder head. The sealing end plate covers the side of the lower cylinder head away from the cylinder body and seals the groove.

9. The rotor pump as described in claim 8, characterized in that, The groove is an annular groove surrounding the central axis of the bushing; And / or, the lower cylinder head is provided with a second mounting cavity for mounting a rotating shaft in the middle, and a spiral second oil groove is provided in the second mounting cavity; And / or, the third through hole is opened radially.

10. A compressor, characterized in that, It includes a housing, a heat exchange device, and a rotor pump as described in any one of claims 7 to 9, wherein the rotor pump is disposed within the housing, and the heat exchange device is provided with a hot path and a cold path, wherein cooling water flows through the cold path; The housing is provided with a first air inlet, a second air inlet, a first air outlet, and a second air outlet; The first air inlet is connected to the intake chamber of the cylinder, and the refrigerant outside the housing enters through the first air inlet; One end of the second air inlet is connected to the heat path outlet of the heat exchange device, and the other end is connected to the inside of the housing; The first air outlet is connected to the third through hole and to the heat inlet of the heat exchange device; The refrigerant inside the casing is discharged from the second air outlet.

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