Pump body structure and compressor

Abstract

The utility model relates to a kind of pump body structure and compressor, pump body structure includes sequentially axially connected upper bearing, upper cylinder, intermediate plate, lower cylinder, lower bearing, upper cylinder has upper compression chamber, lower cylinder has lower compression chamber, lower cylinder is equipped with air supplement passage, one end of air supplement passage is through the outside wall of lower cylinder, the other end of air supplement passage is through the end surface of lower cylinder and the abutment of intermediate plate;Intermediate plate has the air injection passage of intercommunication upper compression chamber, lower compression chamber, the end surface of intermediate plate and upper cylinder is recessed to form valve seat groove, valve seat groove has the first channel of intercommunication air supplement passage and the second channel of intercommunication air injection passage, check valve is arranged in valve seat groove, check valve is cover and is set in first channel, and check valve is used to control the on-off between first channel and second channel.The utility model can make the position of air injection passage better, clearance volume is smaller, the air supplement efficiency of compressor is higher, and vibration noise is lower.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a pump body structure and a compressor. Background Technology

[0002] Vapor injection enthalpy-increasing compressors are widely used in the heating field, especially in low-temperature heating. Existing vapor injection enthalpy-increasing compressors generally use vapor injection enthalpy-increasing flow channels on the cylinder. A one-way valve seat within these channels effectively prevents backflow, but the valve seat can only be positioned as close as possible to the high-pressure side of the slide block; however, this is not the optimal vapor injection position. If the valve seat is positioned further away from the high-pressure side of the slide block, when the compressor is running, the piston in the cylinder passes through the channel directly connecting the valve seat and the cylinder, causing refrigerant leakage from the high-pressure side of the cylinder cavity to the low-pressure side, thus reducing compressor performance. Furthermore, for dual-cylinder compressors, separate valve seats, valve plates, limit plates, bolts, etc., are required on each cylinder, which is not only costly but also leads to a further increase in clearance volume due to the presence of two valve seats. Utility Model Content

[0003] Based on this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a pump body structure and compressor. By setting an air jet channel in the middle plate and a gas replenishment channel in the lower cylinder, the position of the air jet channel is better and the clearance volume is smaller. Furthermore, by using a check valve to prevent backflow, the gas replenishment efficiency of the compressor is higher and the vibration and noise are lower.

[0004] To achieve the above objectives, the first aspect of this utility model provides a pump body structure, including an upper bearing, an upper cylinder, an intermediate plate, a lower cylinder, and a lower bearing connected axially in sequence. The upper cylinder has an upper compression chamber, the lower cylinder has a lower compression chamber, and the lower cylinder has an air supply channel. One end of the air supply channel penetrates the outer side wall of the lower cylinder, and the other end of the air supply channel penetrates the end face of the lower cylinder that abuts against the intermediate plate. The intermediate plate has an air jet passage connecting the upper compression chamber and the lower compression chamber. The end face of the intermediate plate that abuts against the upper cylinder is recessed to form a valve seat groove. The valve seat groove has a first channel connecting the air supply channel and a second channel connecting the air jet passage. A check valve is provided in the valve seat groove. The check valve is closable and covers the first channel, and the check valve is used to control the connection and disconnection between the first channel and the second channel.

[0005] Therefore, according to the pump body structure of this utility model, by setting an air supply channel in the lower cylinder and a check valve and an air jet channel in the intermediate plate, it is possible to achieve the effect of setting an air jet channel in the intermediate plate to connect the upper and lower compression chambers, and also solve the problem that the air supply channel cannot be set due to the thinness of the intermediate plate. In this way, this utility model can set the air jet channel of the intermediate plate at a position far away from the upper or lower slider groove, and prevent the backflow of the air jet channel through the check valve, thereby making the clearance volume of this utility model smaller, the air supply efficiency higher, and the vibration and noise relatively lower. In addition, this utility model does not require setting two sets of air jet enthalpy increasing channels, the structure is relatively simpler, and the cost is relatively lower.

[0006] In one embodiment, the inner wall of the upper compression chamber is provided with an upper sliding groove in the radial direction, and the inner wall of the lower compression chamber is provided with a lower sliding groove in the radial direction. The projections of the upper sliding groove and the lower sliding groove in the axial direction overlap. The jet passage is opened through the intermediate plate in the axial direction. The angle formed by the axis of the jet passage to the upper compression chamber and the axis of the upper sliding groove or the lower sliding groove to the upper compression chamber is β, which satisfies the relationship: 45°≤β≤155°.

[0007] In one embodiment, the middle plate has a through hole that is coaxially arranged with the upper compression chamber and the lower compression chamber. The angle between the axis of the jet channel to the middle hole and the axis of the upper slider groove or the lower slider groove to the middle hole is β, which satisfies the relationship: 50°≤β≤150°.

[0008] In one implementation, the angle formed between the second channel and the jet channel is α, satisfying the relationship: 30°≤α≤60°.

[0009] In one embodiment, the first channel extends axially through the end of the intermediate plate away from the upper cylinder, and the axis of the first channel is parallel to the axis of the intermediate plate.

[0010] In one implementation, the air supply channel is an L-shaped channel.

[0011] As one embodiment, it also includes an upper muffler cover, a lower muffler cover, and a crankshaft. The upper muffler cover is disposed at the end of the upper bearing away from the upper cylinder, and the lower muffler cover is disposed at the end of the lower bearing away from the lower cylinder. The crankshaft passes through the upper muffler cover, the upper bearing, the upper cylinder, the intermediate plate, the lower cylinder, the lower bearing, and the lower muffler cover in sequence.

[0012] The second aspect of this utility model provides a compressor comprising the pump body structure described in any of the preceding claims. According to the compressor of this utility model embodiment, by providing a jet channel in the intermediate plate and a replenishment channel in the lower cylinder, the position of the jet channel is optimized, the clearance volume is smaller, and backflow is prevented by a check valve, resulting in higher replenishment efficiency and lower vibration and noise in the compressor.

[0013] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the pump body structure according to an embodiment of the present utility model; Figure 2 This is a cross-sectional schematic diagram of the pump body structure according to an embodiment of the present utility model; Figure 3 This is one of the connection diagrams of the intermediate plate, lower cylinder, and lower bearing in an embodiment of this utility model; Figure 4 This is a second schematic diagram showing the connection of the intermediate plate, lower cylinder, and lower bearing in an embodiment of this utility model. Figure 5 This is an exploded view of the intermediate plate, lower cylinder, and lower bearing of an embodiment of the present utility model; Figure 6 This is one of the structural schematic diagrams of the intermediate plate in an embodiment of this utility model; Figure 7 This is a second schematic diagram of the structure of the intermediate plate in an embodiment of this utility model; Figure 8 for Figure 7 The diagram shows a cross-sectional view along direction AA.

[0015] Explanation of reference numerals in the attached figures: 10. Intermediate plate; 11. Intermediate hole; 12. Valve seat groove; 13. Check valve; 14. First channel; 15. Second channel; 16. Jet channel; 20. Upper cylinder; 21. Upper compression chamber; 22. Upper slider groove; 30. Lower cylinder; 31. Lower compression chamber; 32. Lower slider groove; 33. Air supply channel; 40. Upper bearing; 50. Lower bearing; 60. Upper muffler cover; 70. Lower muffler cover; 80. Crankshaft; 90. Compressor housing; 91. Air supply tank. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0018] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0019] In related technologies, vapor injection enthalpy-increasing compressors are widely used in the heating field, especially in low-temperature heating. Existing vapor injection enthalpy-increasing compressors generally use vapor injection enthalpy-increasing flow channels on the cylinder. One-way valve seats within these channels effectively prevent backflow, but the valve seat can only be positioned as close as possible to the high-pressure side of the slide block; however, this is not the optimal vapor injection position. If the valve seat is positioned further away from the high-pressure side of the slide block, when the compressor is running, the piston in the cylinder passes through the channel directly connecting the valve seat and the cylinder, causing refrigerant on the high-pressure side of the cylinder cavity to leak to the low-pressure side, thus reducing compressor performance. Furthermore, for dual-cylinder compressors, valve seats, valve plates, limit plates, bolts, etc., need to be installed on each of the two cylinders, which is not only costly but also leads to a further increase in clearance volume due to the presence of two valve seats.

[0020] In view of this, the present invention provides a pump body structure and a compressor. According to the pump body structure and compressor of the present invention, by setting an air jet channel in the middle plate and a replenishment air channel in the lower cylinder, the position of the air jet channel is better and the clearance volume is smaller. Furthermore, by using a check valve to prevent backflow, the compressor's replenishment air efficiency is higher and the vibration and noise are lower.

[0021] Please see Figures 1 to 8 The first aspect of this utility model provides a pump body structure, including an upper bearing 40, an upper cylinder 20, an intermediate plate 10, a lower cylinder 30, and a lower bearing 50 connected axially in sequence. The upper cylinder 20 has an upper compression chamber 21, and the lower cylinder 30 has a lower compression chamber 31. The lower cylinder 30 has an air supply channel 33, one end of which penetrates the outer side wall of the lower cylinder 30, and the other end of which penetrates the end face of the lower cylinder 30 that abuts against the intermediate plate 10. The intermediate plate 10... The intermediate plate 10 has a jet passage 16 that connects the upper compression chamber 21 and the lower compression chamber 31. The end face of the intermediate plate 10 that abuts against the upper cylinder 20 is recessed to form a valve seat groove 12. The valve seat groove 12 has a first channel 14 that connects to the air supply channel 33 and a second channel 15 that connects to the jet passage 16. A check valve 13 is provided in the valve seat groove 12. The check valve 13 is openably and closeably covered on the first channel 14 and is used to control the opening and closing between the first channel 14 and the second channel 15. In addition, the pump body structure of this utility model also includes an upper muffler cover 60, a lower muffler cover 70, and a crankshaft 80. The upper muffler cover 60 is located at the end of the upper bearing 40 away from the upper cylinder 20, and the lower muffler cover 70 is located at the end of the lower bearing 50 away from the lower cylinder 30. The crankshaft 80 passes through the upper muffler cover 60, the upper bearing 40, the upper cylinder 20, the intermediate plate 10, the lower cylinder 30, the lower bearing 50, and the lower muffler cover 70 in sequence.

[0022] Therefore, according to the pump body structure of this utility model, by setting an air supply channel 33 in the lower cylinder 30 and setting a check valve 13 and an air jet channel 16 in the intermediate plate 10, it is possible to achieve the effect of setting an air jet channel 16 on the intermediate plate 10 to connect the upper compression chamber 21 and the lower compression chamber 31, and also solve the problem that the air supply channel 33 cannot be set due to the thinness of the intermediate plate 10. In this way, this utility model can set the air jet channel 16 of the intermediate plate 10 at a position far away from the upper slider groove 22 or the lower slider groove 32, and prevent the backflow of the air jet channel 16 through the check valve 13, thereby making the clearance volume of this utility model smaller, the air supply efficiency higher, and the vibration noise relatively lower. In addition, this utility model does not need to set two sets of air jet enthalpy increasing channels, the structure is relatively simpler, and the cost is relatively lower.

[0023] In this embodiment of the invention, the inner wall of the upper compression chamber 21 is radially provided with an upper sliding groove 22, and the inner wall of the lower compression chamber 31 is radially provided with a lower sliding groove 32. The projections of the upper sliding groove 22 and the lower sliding groove 32 in the axial direction overlap. The jet channel 16 is axially penetrating through the intermediate plate 10. The angle formed by the axis of the jet channel 16 to the upper compression chamber 21 and the axis of the upper sliding groove 22 or the lower sliding groove 32 to the upper compression chamber 21 is β, satisfying the relationship: 45°≤β≤155°. Further, in this embodiment of the invention, the middle plate 10 is provided with a central hole 11 coaxially arranged with the upper compression chamber 21 and the lower compression chamber 31. The angle formed by the axis of the jet channel 16 to the central hole 11 and the axis of the upper sliding groove 22 or the lower sliding groove 32 to the central hole 11 is β, satisfying the relationship: 50°≤β≤150°.

[0024] Optionally, in some embodiments of this utility model, the included angle formed between the second channel 15 and the jet channel 16 is α, satisfying the relationship: 30°≤α≤60°.

[0025] Optionally, in some embodiments of this invention, the first channel 14 extends axially through the end of the intermediate plate 10 away from the upper cylinder 20, and the axis of the first channel 14 is parallel to the axis of the intermediate plate 10. Furthermore, in these embodiments, the air supply channel 33 is an L-shaped channel.

[0026] The following is combined with Figures 1 to 8 The following is a detailed description of a specific embodiment of the pump body structure according to the present invention. It is worth understanding that the following is merely an illustrative description and should not be construed as a limitation of the present invention.

[0027] This embodiment provides a pump body structure, including an upper bearing 40, an upper cylinder 20, an intermediate plate 10, a lower cylinder 30, and a lower bearing 50 connected axially in sequence. The upper cylinder 20 has an upper compression chamber 21, and the lower cylinder 30 has a lower compression chamber 31. The lower cylinder 30 has an air supply channel 33, one end of which penetrates the outer side wall of the lower cylinder 30, and the other end of which penetrates the end face of the lower cylinder 30 that abuts against the intermediate plate 10. The intermediate plate 10 has... The jet passage 16 connects the upper compression chamber 21 and the lower compression chamber 31. A valve seat groove 12 is formed in the recessed end face of the intermediate plate 10 that abuts against the upper cylinder 20. The valve seat groove 12 has a first channel 14 connecting the replenishment channel 33 and a second channel 15 connecting the jet passage 16. A check valve 13 is provided in the valve seat groove 12. The check valve 13 is closable and covers the first channel 14, and is used to control the opening and closing between the first channel 14 and the second channel 15. Furthermore, the pump body structure of this embodiment also includes an upper muffler cover 60, a lower muffler cover 70, and a crankshaft 80. The upper muffler cover 60 is located at the end of the upper bearing 40 away from the upper cylinder 20, and the lower muffler cover 70 is located at the end of the lower bearing 50 away from the lower cylinder 30. The crankshaft 80 passes sequentially through the upper muffler cover 60, the upper bearing 40, the upper cylinder 20, the intermediate plate 10, the lower cylinder 30, the lower bearing 50, and the lower muffler cover 70.

[0028] In this embodiment, the upper cylinder 20 and the lower cylinder 30 are respectively provided with an upper cavity and a lower cavity. The upper bearing 40 and the intermediate plate 10 are respectively covered on both axial ends of the upper cylinder 20 and together form the upper compression cavity 21. The intermediate plate 10 and the lower bearing 50 are respectively covered on both axial ends of the lower cylinder 30 and together form the lower compression cavity 31. The end face of the upper cylinder 20 that abuts against the intermediate plate 10 is sealed on the valve seat groove 12 of the intermediate plate 10, thereby ensuring the sealing of the valve seat groove 12. In this way, when the gas supply tank 91 injects high-speed refrigerant gas into the gas supply channel 33, the high-speed refrigerant gas enters the first channel 14 of the intermediate plate 10 along the gas supply channel 33 and lifts the check valve. Then, it enters the jet channel 16 of the intermediate plate 10 through the second channel 15 of the valve seat groove 12, and is injected into the upper compression chamber 21 and the lower compression chamber 31 respectively through the jet channel 16, thereby realizing the jet enthalpy increase operation of the upper cylinder 20 and the lower cylinder 30.

[0029] Specifically, in this embodiment, the inner wall of the upper compression chamber 21 is provided with an upper sliding groove 22 radially, and the inner wall of the lower compression chamber 31 is provided with a lower sliding groove 32 radially. The projections of the upper sliding groove 22 and the lower sliding groove 32 in the axial direction overlap. The jet channel 16 is opened through the intermediate plate 10 along the axial direction. The angle formed by the axis of the jet channel 16 to the upper compression chamber 21 and the axis of the upper sliding groove 22 or the lower sliding groove 32 to the upper compression chamber 21 is β, satisfying the relationship: β=155°. In addition, in this embodiment, the angle formed between the second channel 15 and the jet channel 16 is α, satisfying the relationship: α=60°.

[0030] In this embodiment, the first channel 14 extends axially through the end of the intermediate plate 10 away from the upper cylinder 20, and the axis of the first channel 14 is parallel to the axis of the intermediate plate 10. Furthermore, in these embodiments, the air supply channel 33 is an L-shaped channel.

[0031] The following is combined with Figures 1 to 8 The following is a detailed description of a specific embodiment of the pump body structure according to the present invention. It is worth understanding that the following is merely an illustrative description and should not be construed as a limitation of the present invention.

[0032] This embodiment provides a pump body structure, including an upper bearing 40, an upper cylinder 20, an intermediate plate 10, a lower cylinder 30, and a lower bearing 50 connected axially in sequence. The upper cylinder 20 has an upper compression chamber 21, and the lower cylinder 30 has a lower compression chamber 31. The lower cylinder 30 has an air supply channel 33, one end of which penetrates the outer side wall of the lower cylinder 30, and the other end of which penetrates the end face of the lower cylinder 30 that abuts against the intermediate plate 10. The intermediate plate 10 has... The jet passage 16 connects the upper compression chamber 21 and the lower compression chamber 31. A valve seat groove 12 is formed in the recessed end face of the intermediate plate 10 that abuts against the upper cylinder 20. The valve seat groove 12 has a first channel 14 connecting the replenishment channel 33 and a second channel 15 connecting the jet passage 16. A check valve 13 is provided in the valve seat groove 12. The check valve 13 is closable and covers the first channel 14, and is used to control the opening and closing between the first channel 14 and the second channel 15. Furthermore, the pump body structure of this embodiment also includes an upper muffler cover 60, a lower muffler cover 70, and a crankshaft 80. The upper muffler cover 60 is located at the end of the upper bearing 40 away from the upper cylinder 20, and the lower muffler cover 70 is located at the end of the lower bearing 50 away from the lower cylinder 30. The crankshaft 80 passes sequentially through the upper muffler cover 60, the upper bearing 40, the upper cylinder 20, the intermediate plate 10, the lower cylinder 30, the lower bearing 50, and the lower muffler cover 70.

[0033] In this embodiment, the upper cylinder 20 and the lower cylinder 30 are respectively provided with an upper cavity and a lower cavity. The upper bearing 40 and the intermediate plate 10 are respectively covered on both axial ends of the upper cylinder 20 and together form the upper compression cavity 21. The intermediate plate 10 and the lower bearing 50 are respectively covered on both axial ends of the lower cylinder 30 and together form the lower compression cavity 31. The end face of the upper cylinder 20 that abuts against the intermediate plate 10 is sealed on the valve seat groove 12 of the intermediate plate 10, thereby ensuring the sealing of the valve seat groove 12. In this way, when the gas supply tank 91 injects high-speed refrigerant gas into the gas supply channel 33, the high-speed refrigerant gas enters the first channel 14 of the intermediate plate 10 along the gas supply channel 33 and lifts the check valve. Then, it enters the jet channel 16 of the intermediate plate 10 through the second channel 15 of the valve seat groove 12, and is injected into the upper compression chamber 21 and the lower compression chamber 31 respectively through the jet channel 16, thereby realizing the jet enthalpy increase operation of the upper cylinder 20 and the lower cylinder 30.

[0034] Specifically, in this embodiment, the inner wall of the upper compression chamber 21 is provided with an upper sliding groove 22 radially, and the inner wall of the lower compression chamber 31 is provided with a lower sliding groove 32 radially. The projections of the upper sliding groove 22 and the lower sliding groove 32 in the axial direction overlap. The jet channel 16 is opened through the intermediate plate 10 along the axial direction. The angle formed by the axis of the jet channel 16 to the upper compression chamber 21 and the axis of the upper sliding groove 22 or the lower sliding groove 32 to the upper compression chamber 21 is β, satisfying the relationship: β=45°. In addition, in this embodiment, the angle formed between the second channel 15 and the jet channel 16 is α, satisfying the relationship: α=30°.

[0035] In this embodiment, the first channel 14 extends axially through the end of the intermediate plate 10 away from the upper cylinder 20, and the axis of the first channel 14 is parallel to the axis of the intermediate plate 10. Furthermore, in these embodiments, the air supply channel 33 is an L-shaped channel.

[0036] The following is combined with Figures 1 to 8 The following is a detailed description of a specific embodiment of the pump body structure according to the present invention. It is worth understanding that the following is merely an illustrative description and should not be construed as a limitation of the present invention.

[0037] This embodiment provides a pump body structure, including an upper bearing 40, an upper cylinder 20, an intermediate plate 10, a lower cylinder 30, and a lower bearing 50 connected axially in sequence. The upper cylinder 20 has an upper compression chamber 21, and the lower cylinder 30 has a lower compression chamber 31. The lower cylinder 30 has an air supply channel 33, one end of which penetrates the outer side wall of the lower cylinder 30, and the other end of which penetrates the end face of the lower cylinder 30 that abuts against the intermediate plate 10. The intermediate plate 10 has... The jet passage 16 connects the upper compression chamber 21 and the lower compression chamber 31. A valve seat groove 12 is formed in the recessed end face of the intermediate plate 10 that abuts against the upper cylinder 20. The valve seat groove 12 has a first channel 14 connecting the replenishment channel 33 and a second channel 15 connecting the jet passage 16. A check valve 13 is provided in the valve seat groove 12. The check valve 13 is closable and covers the first channel 14, and is used to control the opening and closing between the first channel 14 and the second channel 15. Furthermore, the pump body structure of this embodiment also includes an upper muffler cover 60, a lower muffler cover 70, and a crankshaft 80. The upper muffler cover 60 is located at the end of the upper bearing 40 away from the upper cylinder 20, and the lower muffler cover 70 is located at the end of the lower bearing 50 away from the lower cylinder 30. The crankshaft 80 passes sequentially through the upper muffler cover 60, the upper bearing 40, the upper cylinder 20, the intermediate plate 10, the lower cylinder 30, the lower bearing 50, and the lower muffler cover 70.

[0038] In this embodiment, the upper cylinder 20 and the lower cylinder 30 are respectively provided with an upper cavity and a lower cavity. The upper bearing 40 and the intermediate plate 10 are respectively covered on both axial ends of the upper cylinder 20 and together form the upper compression cavity 21. The intermediate plate 10 and the lower bearing 50 are respectively covered on both axial ends of the lower cylinder 30 and together form the lower compression cavity 31. The end face of the upper cylinder 20 that abuts against the intermediate plate 10 is sealed on the valve seat groove 12 of the intermediate plate 10, thereby ensuring the sealing of the valve seat groove 12. In this way, when the gas supply tank 91 injects high-speed refrigerant gas into the gas supply channel 33, the high-speed refrigerant gas enters the first channel 14 of the intermediate plate 10 along the gas supply channel 33 and lifts the check valve. Then, it enters the jet channel 16 of the intermediate plate 10 through the second channel 15 of the valve seat groove 12, and is injected into the upper compression chamber 21 and the lower compression chamber 31 respectively through the jet channel 16, thereby realizing the jet enthalpy increase operation of the upper cylinder 20 and the lower cylinder 30.

[0039] Specifically, in this embodiment, the inner wall of the upper compression chamber 21 is radially provided with an upper sliding groove 22, and the inner wall of the lower compression chamber 31 is radially provided with a lower sliding groove 32. The projections of the upper sliding groove 22 and the lower sliding groove 32 in the axial direction overlap. The jet channel 16 is axially opened through the intermediate plate 10, and the middle part of the intermediate plate 10 is provided with a central hole 11 coaxially arranged with the upper compression chamber 21 and the lower compression chamber 31. The central hole 11 is used for the crankshaft 80 to pass through. The angle formed by the axis of the jet channel 16 to the central hole 11 and the axis of the upper sliding groove 22 or the lower sliding groove 32 to the central hole 11 is β, satisfying the relationship: β=150°. In addition, in this embodiment, the angle formed between the second channel 15 and the jet channel 16 is α, satisfying the relationship: α=45°.

[0040] In this embodiment, the first channel 14 extends axially through the end of the intermediate plate 10 away from the upper cylinder 20, and the axis of the first channel 14 is parallel to the axis of the intermediate plate 10. Furthermore, in these embodiments, the air supply channel 33 is an L-shaped channel.

[0041] The following is combined with Figures 1 to 8 The following is a detailed description of a specific embodiment of the pump body structure according to the present invention. It is worth understanding that the following is merely an illustrative description and should not be construed as a limitation of the present invention.

[0042] This embodiment provides a pump body structure, including an upper bearing 40, an upper cylinder 20, an intermediate plate 10, a lower cylinder 30, and a lower bearing 50 connected axially in sequence. The upper cylinder 20 has an upper compression chamber 21, and the lower cylinder 30 has a lower compression chamber 31. The lower cylinder 30 has an air supply channel 33, one end of which penetrates the outer side wall of the lower cylinder 30, and the other end of which penetrates the end face of the lower cylinder 30 that abuts against the intermediate plate 10. The intermediate plate 10 has... The jet passage 16 connects the upper compression chamber 21 and the lower compression chamber 31. A valve seat groove 12 is formed in the recessed end face of the intermediate plate 10 that abuts against the upper cylinder 20. The valve seat groove 12 has a first channel 14 connecting the replenishment channel 33 and a second channel 15 connecting the jet passage 16. A check valve 13 is provided in the valve seat groove 12. The check valve 13 is closable and covers the first channel 14, and is used to control the opening and closing between the first channel 14 and the second channel 15. Furthermore, the pump body structure of this embodiment also includes an upper muffler cover 60, a lower muffler cover 70, and a crankshaft 80. The upper muffler cover 60 is located at the end of the upper bearing 40 away from the upper cylinder 20, and the lower muffler cover 70 is located at the end of the lower bearing 50 away from the lower cylinder 30. The crankshaft 80 passes sequentially through the upper muffler cover 60, the upper bearing 40, the upper cylinder 20, the intermediate plate 10, the lower cylinder 30, the lower bearing 50, and the lower muffler cover 70.

[0043] In this embodiment, the upper cylinder 20 and the lower cylinder 30 are respectively provided with an upper cavity and a lower cavity. The upper bearing 40 and the intermediate plate 10 are respectively covered on both axial ends of the upper cylinder 20 and together form the upper compression cavity 21. The intermediate plate 10 and the lower bearing 50 are respectively covered on both axial ends of the lower cylinder 30 and together form the lower compression cavity 31. The end face of the upper cylinder 20 that abuts against the intermediate plate 10 is sealed on the valve seat groove 12 of the intermediate plate 10, thereby ensuring the sealing of the valve seat groove 12. In this way, when the gas supply tank 91 injects high-speed refrigerant gas into the gas supply channel 33, the high-speed refrigerant gas enters the first channel 14 of the intermediate plate 10 along the gas supply channel 33 and lifts the check valve. Then, it enters the jet channel 16 of the intermediate plate 10 through the second channel 15 of the valve seat groove 12, and is injected into the upper compression chamber 21 and the lower compression chamber 31 respectively through the jet channel 16, thereby realizing the jet enthalpy increase operation of the upper cylinder 20 and the lower cylinder 30.

[0044] Specifically, in this embodiment, the inner wall of the upper compression chamber 21 is radially provided with an upper sliding groove 22, and the inner wall of the lower compression chamber 31 is radially provided with a lower sliding groove 32. The projections of the upper sliding groove 22 and the lower sliding groove 32 in the axial direction overlap. The jet channel 16 is axially penetrated through the intermediate plate 10. A central hole 11, coaxially arranged with the upper compression chamber 21 and the lower compression chamber 31, is provided through the middle of the intermediate plate 10. The central hole 11 is used for the crankshaft 80 to pass through. The angle formed by the axis of the jet channel 16 to the central hole 11 and the axis of the upper sliding groove 22 or the lower sliding groove 32 to the central hole 11 is β, satisfying the relationship: β = 50°. In addition, in this embodiment, the angle formed between the second channel 15 and the jet channel 16 is α, satisfying the relationship: α = 45°.

[0045] In this embodiment, the first channel 14 extends axially through the end of the intermediate plate 10 away from the upper cylinder 20, and the axis of the first channel 14 is parallel to the axis of the intermediate plate 10. Furthermore, in these embodiments, the air supply channel 33 is an L-shaped channel.

[0046] The second aspect of this utility model provides a compressor, which includes the pump body structure described above, and further includes a compressor housing 90, a liquid receiver, and a gas replenishment tank 91. The pump body structure is disposed inside the compressor housing 90, and the liquid receiver and gas replenishment tank 91 are respectively disposed on the outer wall of the compressor housing 90. The liquid receiver is connected to the upper cylinder 20 and the lower cylinder 30 respectively, and the gas replenishment tank 91 is connected to the gas replenishment channel 33. In this way, the gas replenishment tank 91 can replenish the gas replenishment channel 33. According to the compressor of this utility model embodiment, by setting the jet channel 16 in the intermediate plate 10 and the gas replenishment channel 33 in the lower cylinder 30, the position of the jet channel 16 is better, the clearance volume is smaller, and the backflow phenomenon is prevented by the check valve 13, so that the gas replenishment efficiency of the compressor is higher and the vibration noise is lower.

[0047] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the pump body structure and compressor of this utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A pump body structure, characterized in that: The device includes an upper bearing, an upper cylinder, an intermediate plate, a lower cylinder, and a lower bearing connected axially in sequence. The upper cylinder has an upper compression chamber, and the lower cylinder has a lower compression chamber. The lower cylinder has an air supply channel. One end of the air supply channel penetrates the outer side wall of the lower cylinder, and the other end of the air supply channel penetrates the end face of the lower cylinder that abuts against the intermediate plate. The intermediate plate has an air jet passage connecting the upper compression chamber and the lower compression chamber. The end face of the intermediate plate that abuts against the upper cylinder is recessed to form a valve seat groove. The valve seat groove has a first channel connecting the air supply channel and a second channel connecting the air jet passage. A check valve is provided in the valve seat groove. The check valve is closable and covers the first channel, and the check valve is used to control the connection and disconnection between the first channel and the second channel.

2. The pump body structure according to claim 1, characterized in that: The inner wall of the upper compression chamber is provided with an upper sliding groove in the radial direction, and the inner wall of the lower compression chamber is provided with a lower sliding groove in the radial direction. The projections of the upper sliding groove and the lower sliding groove in the axial direction overlap. The jet channel is opened through the middle plate in the axial direction. The angle formed by the axis of the jet channel to the upper compression chamber and the axis of the upper sliding groove or the lower sliding groove to the upper compression chamber is β, which satisfies the relationship: 45°≤β≤155°.

3. The pump body structure according to claim 2, characterized in that: The middle plate has a through hole that is coaxially arranged with the upper compression chamber and the lower compression chamber. The angle formed by the axis of the jet channel to the middle hole and the axis of the upper slider groove or the lower slider groove to the middle hole is β, which satisfies the relationship: 50°≤β≤150°.

4. The pump body structure according to claim 2, characterized in that: The angle between the second channel and the jet channel is α, which satisfies the relationship: 30°≤α≤60°.

5. The pump body structure according to claim 1, characterized in that: The first channel extends axially through the end of the intermediate plate away from the upper cylinder, and the axis of the first channel is parallel to the axis of the intermediate plate.

6. The pump body structure according to claim 1, characterized in that: The air supply channel is an L-shaped channel.

7. The pump body structure according to claim 1, characterized in that: It also includes an upper muffler cover, a lower muffler cover, and a crankshaft. The upper muffler cover is located at the end of the upper bearing away from the upper cylinder, and the lower muffler cover is located at the end of the lower bearing away from the lower cylinder. The crankshaft passes through the upper muffler cover, the upper bearing, the upper cylinder, the intermediate plate, the lower cylinder, the lower bearing, and the lower muffler cover in sequence.

8. A compressor, characterized in that: Includes the pump body structure according to any one of claims 1-7.

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