Pump structure, compressor and heat exchange equipment

Abstract

The present invention provides a pump body structure, a compressor and a heat exchange device. The pump body structure includes: a cylinder assembly, the cylinder assembly includes a cylinder; a piston, the piston is movably arranged in the cylinder; a driving part; a transmission structure, the driving part is connected to the piston through the transmission structure, so that the piston rotates relative to the cylinder and moves forward and backward in the cylinder along the pivot axis of the piston. The present invention solves the problem of poor performance of compressors in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of compressor equipment, and in particular to a pump body structure, a compressor and a heat exchange equipment. Background Art

[0002] In the existing piston compressor based on connecting rod transmission, the rotation direction of the main shaft and the reciprocating motion direction of the piston are perpendicular to each other, the connecting rod transmission has a large efficiency loss, and the main shaft has an eccentric structure. Multi-stage piston compressors have the problem of complex structure.

[0003] Therefore, the existing compressor has the problem of poor performance. Summary of the invention

[0004] The main purpose of the present invention is to provide a pump body structure, a compressor and a heat exchange device to solve the problem of poor performance of the compressor in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a pump body structure is provided, including: a cylinder assembly, the cylinder assembly includes a cylinder; a piston, the piston is movably arranged in the cylinder; a driving part; a transmission structure, the driving part is connected to the piston driving through the transmission structure, so that the piston rotates relative to the cylinder and moves back and forth in the cylinder along the pivot axis of the piston.

[0006] Furthermore, the outer wall of the piston is provided with guide grooves connected end to end along its circumferential direction, and the cylinder is provided with a guide structure extending into the guide groove; or the inner surface of the cylinder is provided with guide grooves connected end to end along its circumferential direction, and the piston is provided with a guide structure extending into the guide groove.

[0007] Furthermore, the guide rail groove is a continuous wave-curved guide rail groove.

[0008] Furthermore, the wave-shaped guide groove is a sine-cosine wave-shaped guide groove.

[0009] Furthermore, the number of crests and troughs of the sine-cosine waveform guide groove in the circumferential direction of the cylinder or the piston is consistent and both are greater than or equal to 2.

[0010] Furthermore, there are one or more guide structures, and when the number of the guide structures is plural, the number of the guide structures is no more than the number of the wave crests, and the multiple guide structures are located in the same radial plane of the piston.

[0011] Furthermore, the guide structure is one or more, and the exhaust volume Vone of the pump structure satisfies the following relationship:

[0012] Vone=K1*K2*A*S Formula (1)

[0013] Among them, K1 is a coefficient, and K1 is an integer greater than zero; K2 is the number of guide structures; A is the amplitude of the sine-cosine waveform guide groove; S is the area of ​​the end face of the piston facing the compression chamber of the cylinder.

[0014] Furthermore, the guide structure is a pin extending into the guide rail groove.

[0015] Furthermore, a rolling bearing is arranged at one end of the guide structure extending into the guide rail groove.

[0016] Furthermore, the transmission structure is a shaft body, which is coaxially arranged with the pivot axis of the piston, and the piston is sleeved on the shaft body. When the shaft body rotates, the piston rotates synchronously with the shaft body and slides back and forth along the shaft body.

[0017] Furthermore, the first end of the shaft body is inserted into the piston, the driving part is located at the second end of the shaft body, and the end of the shaft body extending into the piston is provided with a first circumferential anti-rotation structure, and the piston is provided with a second circumferential anti-rotation structure cooperating with the first circumferential anti-rotation structure.

[0018] Further, the first circumferential anti-rotation structure is a guide groove extending along the axial direction on the outer circumferential surface of the shaft body, and the second circumferential anti-rotation structure is a guide protrusion extending into the guide groove, and the guide protrusion moves back and forth in the guide groove with the movement of the piston; or the second circumferential anti-rotation structure is a guide groove extending along the pivot axis of the piston, and the first circumferential anti-rotation structure is a guide protrusion extending into the guide groove, and the guide protrusion moves back and forth in the guide groove with the movement of the piston.

[0019] Furthermore, the cross section of the end of the shaft body extending into the piston is a non-circular cross section.

[0020] Furthermore, the outer circumferential surface of the end of the shaft body extending into the piston includes a first radial support arc surface, a first circumferential support plane, a second circumferential support plane, a third circumferential support plane, a second radial support arc surface, a fourth circumferential support plane, a fifth circumferential support plane, and a sixth circumferential support plane connected end to end in sequence, wherein the first radial support arc surface and the second radial support arc surface are symmetrically arranged, the second circumferential support plane and the fifth circumferential support plane are symmetrically arranged, the first circumferential support plane and the third circumferential support plane are symmetrically arranged, and the fourth circumferential support plane and the sixth circumferential support plane are symmetrically arranged.

[0021] Further, the cross-sectional area of ​​the first end of the shaft body is greater than the cross-sectional area of ​​the second end of the shaft body.

[0022] Furthermore, the guide groove is located on the outer wall of the piston, the transmission structure is a shaft body, the first end of the shaft body is inserted into the piston, and the outer wall of the piston is also provided with an oil guide groove. The piston includes: at least one piston radial oil port, the piston radial oil port is arranged on the bottom wall of the oil guide groove and / or the bottom wall of the guide groove; at least one piston center oil port, the piston radial oil port is connected to the shaft body located in the piston through the piston center oil port.

[0023] Furthermore, the shaft body has a shaft body central oil port and a shaft body radial oil port, and the two are connected, and the shaft body central oil port passes through the axial end surface of the shaft body.

[0024] Furthermore, the pump body structure also includes a support shaft, which is supported at the second end of the shaft body. The support shaft has a support shaft central oil port and at least one support shaft radial oil port, and the support shaft central oil port is connected to the shaft body central oil port, and when there are multiple support shaft radial oil ports, the multiple support shaft radial oil ports are arranged at intervals along the axial direction of the support shaft.

[0025] Furthermore, the outer peripheral wall of the piston is also provided with an air avoidance groove, and the air avoidance groove is located between the guide rail groove and the oil guide groove.

[0026] Furthermore, the cylinder comprises: a cylinder body; a supporting lug, wherein the supporting lug is arranged on an end surface of the cylinder body facing the transmission structure, and the guide structure is arranged on the supporting lug.

[0027] Furthermore, the cylinder assembly also includes a cylinder head, an exhaust valve plate assembly and an intake valve plate assembly. The intake valve plate assembly is arranged between the cylinder and the cylinder head, and the exhaust valve plate assembly is arranged at the cylinder head exhaust port of the cylinder head.

[0028] Furthermore, the intake valve plate assembly includes: an intake valve plate baffle, which is annular; an intake valve plate, which is arranged between the cylinder head and the intake valve plate baffle, and has an intake port, and a spring plate movably arranged at the intake port. When the pump body structure inhales air, the spring plate opens, and the intake valve plate also has a valve plate exhaust port arranged corresponding to the cylinder head exhaust port.

[0029] Furthermore, the exhaust port of the valve plate is located on the spring plate.

[0030] Furthermore, the spring sheet is cut and formed by a part of the air intake valve sheet, and is an integral structure with the air intake valve sheet, and the cutout formed after cutting serves as the air intake port.

[0031] Furthermore, the movement of the piston relative to the cylinder satisfies a trigonometric function relationship, and the center of mass of the cylinder is equivalent to a balance plane with zero amplitude of the trigonometric function. The center of mass of the piston moves continuously relative to the balance plane during the movement of the piston to form a trigonometric function curve.

[0032] According to another aspect of the present invention, a compressor is provided, comprising the above-mentioned pump body structure.

[0033] According to another aspect of the present invention, a heat exchange device is provided, comprising the above-mentioned compressor.

[0034] Furthermore, the heat exchange device is an air conditioner.

[0035] Applying the technical solution of the present invention, the pump body structure in the present application includes a cylinder assembly, a piston, a driving unit and a transmission structure. The cylinder assembly includes a cylinder; the piston is movably arranged in the cylinder; the driving unit is connected to the piston through the transmission structure, so that the piston rotates relative to the cylinder and moves forward and backward in the cylinder along the pivot axis of the piston.

[0036] When the transmission structure of the pump body structure is used, when the transmission structure rotates relative to the cylinder, the piston can not only move forward and backward relative to the cylinder but also rotate relative to the cylinder, and the piston always remains coaxial with the transmission structure during the movement, thereby effectively improving the efficiency of the pump body structure and solving the problem of eccentric rotation of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0038] Figure 1 A schematic structural diagram of a compressor according to a specific embodiment of the present invention is shown;

[0039] Figure 2 Shows Figure 1 An exploded diagram of the pump structure of the compressor;

[0040] Figure 3 Shows Figure 2 A cross-sectional view of the pump structure in FIG.

[0041] Figure 4 Shows Figure 2 A schematic diagram of the transmission structure in FIG.

[0042] Figure 5 Shows Figure 4 A top view of the transmission structure in FIG.

[0043] Figure 6 Shows Figure 2 Schematic diagram of the structure of the piston;

[0044] Figure 7 Shows Figure 6 The front view of the piston in FIG.

[0045] Figure 8 Shows Figure 6 A cross-sectional view of the piston in FIG.

[0046] Fig. 9 Shows Figure 2 The structural diagram of the cylinder in FIG.

[0047] Fig.10 Shows Fig. 9 A cross-sectional view of the cylinder in FIG.

[0048] Fig.11 Shows Figure 2 Schematic diagram of the structure of the cylinder head;

[0049] Fig.12 Shows Fig.11 A cross-sectional view of a cylinder head in FIG.

[0050] Fig.13 Shows Figure 2 A schematic diagram of the structure of the suction valve sheet;

[0051] Fig.14 Shows Figure 2 A schematic diagram of the structure of the air intake valve baffle;

[0052] Fig.15 Shows Figure 1 A schematic diagram of the structure of the support shaft in FIG.

[0053] Fig.16 A diagram showing the connection relationship between the guide structure and the rolling bearing in the present application is shown.

[0054] The above drawings include the following reference numerals:

[0055] 10. Cylinder assembly; 11. Cylinder; 111. Guide structure; 112. Cylinder body; 113. Support lug; 12. Rolling bearing; 13. Cylinder head; 131. Cylinder head exhaust port; 14. Exhaust valve plate assembly; 15. Intake valve plate assembly; 151. Intake valve plate baffle; 152. Intake valve plate; 1521. Intake port; 1522. Spring plate; 1523. Valve plate exhaust port; 20. Piston; 21. Guide groove; 211. Piston radial oil port; 22. Oil guide groove; 23. Piston center oil port; 24. Avoid Empty groove; 30. Driving unit; 40. Transmission structure; 41. First radial support arc surface; 42. First circumferential support plane; 43. Second circumferential support plane; 44. Third circumferential support plane; 45. Second radial support arc surface; 46. Fourth circumferential support plane; 47. Fifth circumferential support plane; 48. Sixth circumferential support plane; 49. Center oil port of shaft body; 491. Radial oil port of shaft body; 50. Guide groove; 60. Guide protrusion; 70. Support shaft; 71. Center oil port of support shaft; 72. Radial oil port of support shaft. DETAILED DESCRIPTION

[0056] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0057] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0058] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0059] In order to solve the problem of poor performance of compressors in the prior art, the present application provides a pump body structure, a compressor and a heat exchange device.

[0060] Among them, the heat exchange equipment in this application includes a compressor.

[0061] like Figure 1 As shown, the compressor has the following pump body structure.

[0062] Optionally, the heat exchange device is an air conditioner.

[0063] like Figures 2 to 16 As shown, the pump body structure in the present application includes a cylinder assembly 10, a piston 20, a driving unit 30 and a transmission structure 40. The cylinder assembly 10 includes a cylinder 11; the piston 20 is movably arranged in the cylinder 11; the driving unit 30 is drivingly connected to the piston 20 through the transmission structure 40, so that the piston 20 rotates relative to the cylinder 11 and moves forward and backward in the cylinder 11 along the pivot axis of the piston 20.

[0064] When the transmission structure 40 rotates relative to the cylinder 11, the piston 20 can not only move forward and backward relative to the cylinder 11 but also rotate relative to the cylinder 11, and the piston 20 always remains coaxial with the transmission structure 40 during the movement, thereby effectively improving the efficiency of the pump body structure and solving the problem of eccentric rotation of the structure.

[0065] Furthermore, it should be pointed out that since the piston 20 has a rotational motion relative to the cylinder 11 , the leakage of the gas in the cylinder 11 can be effectively reduced.

[0066] like Figures 6 to 8As shown, the outer peripheral wall of the piston 20 is provided with guide grooves 21 connected end to end along the circumferential direction thereof, and the cylinder 11 is provided with a guide structure 111 extending into the guide groove 21. Through such a configuration, when the piston 20 moves relative to the cylinder 11, the piston 20 and the cylinder 11 can be connected through the guide structure 111 and the guide groove 21, and when the piston 20 moves relative to the cylinder 11, the guide structure 111 is always kept inside the guide groove 21, so that the movement direction of the piston 20 can be limited.

[0067] Optionally, the inner surface of the cylinder 11 is provided with guide grooves 21 connected end to end along the circumferential direction thereof, and the piston 20 is provided with a guide structure 111 extending into the guide groove 21. When so arranged, the cylinder 11 needs to be arranged as a split structure to facilitate the installation of the cylinder 11 and the piston 20.

[0068] Specifically, the guide groove 21 is a continuous wave-curve guide groove. Since the piston 20 not only moves forward and backward relative to the cylinder 11, but also rotates relative to the cylinder 11 when moving relative to the cylinder 11, the guide groove 21 is set to be a continuous wave-curve guide. The guide groove 21 is set to be continuous to ensure that the piston 20 can rotate relative to the cylinder 11, and the shape of the wave-curve is to ensure that the piston 20 can move up and down relative to the cylinder 11.

[0069] In the above-mentioned waveform guide groove, it is sufficient to ensure that the waveform is a continuous waveform. And the parallel curve can also be a broken line, as long as the waveform guide groove has a certain ups and downs of the non-linear guide groove, because only with the ups and downs can it be ensured that the piston 20 can achieve the suction, compression and exhaust process when moving relative to the cylinder 11.

[0070] It should be noted that, in order to ensure the working effect of the pump body structure, in a specific embodiment of the present application, the wave-shaped guide groove 21 is a sine-cosine wave-shaped guide groove. By setting it in this way, the motion trajectory of the piston 20 can be more regular, so that the piston 20 and the cylinder 11 can be regularly inhaled, compressed and exhausted.

[0071] Optionally, the number of crests and troughs of the sine-cosine waveform guide groove in the circumferential direction of the cylinder 11 or the piston 20 is consistent and greater than or equal to 2. During the movement of the piston 20, each time the piston 20 rotates through a continuous crest and trough, an intake, compression and exhaust process is completed. Therefore, when the number of crests and troughs is consistent and greater than or equal to 2, the piston 20 can complete more than or equal to 2 intake, compression and exhaust processes after one rotation. The working efficiency of the pump body structure is effectively improved. And this setting also realizes multi-stage compression of a single cylinder 11, and has the characteristics of simple structure compared to a multi-cylinder piston 20 compressor.

[0072] like Figure 2 As shown, there are one or more guide structures 111, and when there are multiple guide structures 111, the number of guide structures 111 is no more than the number of wave crests, and multiple guide structures 111 are located in the same radial plane of the piston 20. Since the piston 20 not only has a rotational motion relative to the cylinder 11, but also has a forward and backward motion relative to the cylinder 11, and the guide structure 111 is always located inside the guide rail groove 21 during the movement of the piston 20. Therefore, in order to ensure the normal movement of the piston 20, there can only be one guide structure 111 between adjacent wave crests and wave troughs, and all guide structures 111 need to be on the same plane.

[0073] Specifically, the guide structure 111 is one or more, and the exhaust volume Vone of the pump structure satisfies the following relationship:

[0074] Vone=K1*K2*A*S Formula (1)

[0075] Among them, K1 is a coefficient, and K1 is an integer greater than zero; K2 is the number of guide structures 111; A is the amplitude of the sine-cosine waveform guide groove; S is the area of ​​the end surface of the piston 20 facing the compression chamber of the cylinder 11.

[0076] It should be pointed out that, in the above description, K1*K2 can also be regarded as the number of sine and cosine cycles or the number of wave crests or wave troughs on the guide rail groove 21.

[0077] Optionally, the guide structure 111 is a pin extending into the guide rail groove 21. Of course, other parts can also be selected as the guide structure 111 as long as it can be ensured that the guide structure 111 has a certain strength.

[0078] like Fig.16 As shown, a rolling bearing 12 is disposed at one end of the guide structure 111 extending into the guide groove 21. Since the guide structure 111 and the guide groove 21 also have relative movement during the movement of the piston 20, in order to reduce the influence of the resistance generated by the guide structure 111 and the guide groove 21 on the movement of the piston 20, a rolling bearing 12 needs to be disposed at one end of the guide structure 111 extending into the guide groove 21 to reduce the resistance.

[0079] Specifically, the transmission structure 40 is a shaft body, which is coaxially arranged with the pivot axis of the piston 20. The piston 20 is sleeved on the shaft body, and when the shaft body rotates, the piston 20 rotates synchronously with the shaft body and slides back and forth along the shaft body.

[0080] Specifically, the first end of the shaft body is inserted into the piston 20, the driving part 30 is located at the second end of the shaft body, and the end of the shaft body extending into the piston 20 is provided with a first circumferential anti-rotation structure, and the piston 20 is provided with a second circumferential anti-rotation structure that cooperates with the first circumferential anti-rotation structure. By such an arrangement, relative rotation between the piston 20 and the shaft body can be prevented, thereby ensuring synchronous rotation of the piston 20 and the shaft body.

[0081] It should be noted that although there is no relative rotation between the piston 20 and the shaft body, in order to ensure that the piston 20 can move forward and backward relative to the cylinder 11, the piston 20 must be able to move forward and backward relative to the cylinder 11 along the axis of the shaft body on the shaft body to ensure that the pump body structure can normally perform the suction, compression and exhaust processes.

[0082] In a specific embodiment of the present application, the second circumferential anti-rotation structure is a guide groove 50 extending along the pivot axis of the piston 20, and the first circumferential anti-rotation structure is a guide protrusion 60 extending into the guide groove 50, and as the piston 20 moves, the guide protrusion 60 moves back and forth in the guide groove 50.

[0083] Of course, the first circumferential anti-rotation structure can also be set as a guide groove 50 extending axially on the outer surface of the shaft body, and the second circumferential anti-rotation structure can be a guide protrusion 60 extending into the guide groove 50, and the guide protrusion 60 moves back and forth in the guide groove 50 as the piston 20 moves.

[0084] Alternatively, in order to ensure that there is no relative rotation between the piston 20 and the shaft body, the cross section of the end of the shaft body extending into the piston 20 may be a non-circular cross section.

[0085] like Figure 5 As shown, in a specific embodiment of the present application, the outer peripheral surface of the end of the shaft body extending into the piston 20 includes a first radial support arc surface 41, a first circumferential support plane 42, a second circumferential support plane 43, a third circumferential support plane 44, a second radial support arc surface 45, a fourth circumferential support plane 46, a fifth circumferential support plane 47, and a sixth circumferential support plane 48 connected in sequence, wherein the first radial support arc surface 41 and the second radial support arc surface 45 are symmetrically arranged, the second circumferential support plane 43 and the fifth circumferential support plane 47 are symmetrically arranged, the first circumferential support plane 42 and the third circumferential support plane 44 are symmetrically arranged, and the fourth circumferential support plane 46 and the sixth circumferential support plane 48 are symmetrically arranged. By such an arrangement, while ensuring that the piston 20 can rotate synchronously with the shaft body, the friction between the piston 20 and the shaft body can also be reduced when the piston 20 moves back and forth relative to the cylinder 11. In addition, such an arrangement can also enable the shaft body to provide axial and circumferential support forces for the piston 20 respectively, thereby realizing the transmission of load.

[0086] Optionally, the cross-sectional area of ​​the first end of the shaft body is greater than the cross-sectional area of ​​the second end of the shaft body. By setting it in this way, the connection strength between the shaft body and the piston 20 can be effectively guaranteed to prevent the shaft body from breaking at the connection with the piston 20.

[0087] Specifically, the guide groove 21 is located on the outer peripheral wall of the piston 20, the transmission structure 40 is a shaft body, the first end of the shaft body is inserted into the piston 20, the outer peripheral wall of the piston 20 is also provided with an oil guide groove 22, and the piston 20 includes at least one piston radial oil port 211 and at least one piston center oil port 23. The piston radial oil port 211 is provided on the bottom wall of the oil guide groove 22 and / or the bottom wall of the guide groove 21; the piston radial oil port 211 is connected to the shaft body located in the piston 20 through the piston center oil port 23.

[0088] Specifically, the shaft body has a shaft body central oil port 49 and a shaft body radial oil port 491 , which are connected, and the shaft body central oil port 49 passes through the axial end surface of the shaft body.

[0089] By providing the piston radial oil port 211, the piston center oil port 23, the shaft radial oil port 491 and the shaft center oil port 49, the guide structure 111 and the guide groove 21, and the piston 20 and the shaft can be effectively lubricated. Thus, the friction between the guide structure 111 and the guide groove 21 and the friction between the piston 20 and the shaft can be further reduced.

[0090] Specifically, the pump body structure further includes a support shaft 70, which is supported at the second end of the shaft body, and has a support shaft central oil port 71 and at least one support shaft radial oil port 72, and the support shaft central oil port 71 is connected to the shaft body central oil port 49, and when there are multiple support shaft radial oil ports 72, the multiple support shaft radial oil ports 72 are arranged at intervals along the axial direction of the support shaft 70. In the present application, the support shaft 70 mainly plays the role of providing support for the shaft body, and the end face of the support shaft 70 away from the shaft body is welded to the compressor housing.

[0091] Specifically, the outer peripheral wall of the piston 20 is also provided with a clearance groove 24, and the clearance groove 24 is located between the guide groove 21 and the oil guide groove 22. By such an arrangement, unnecessary wear between the piston 20 and the cylinder 11 can be effectively avoided when the piston 20 moves relative to the cylinder 11.

[0092] Furthermore, it should be noted that the main body of the piston 20 is a column with a certain degree of roughness.

[0093] Specifically, the cylinder 11 includes a cylinder body 112 and a support lug 113. The support lug 113 is arranged on the end surface of the cylinder body 112 facing the transmission structure 40, and the guide structure 111 is arranged on the support lug 113. By such an arrangement, the contact area between the piston 20 and the cylinder 11 can be further reduced, thereby effectively reducing the wear between the cylinder 11 and the piston 20.

[0094] In the present application, the cylinder assembly 10 further includes a flange, and the flange is interference-fitted with a side of the cylinder body 112 away from the support lug 113.

[0095] Specifically, the cylinder assembly 10 further includes a cylinder head 13, an exhaust valve plate assembly 14 and an intake valve plate assembly 15. The intake valve plate assembly 15 is arranged between the cylinder 11 and the cylinder head 13, and the exhaust valve plate assembly 14 is arranged at the cylinder head exhaust port 131 of the cylinder head 13. Such an arrangement can effectively ensure that the pump body structure performs normal intake, compression and exhaust operations.

[0096] Specifically, the air intake valve plate assembly 15 includes an air intake valve plate baffle 151 and an air intake valve plate 152. The air intake valve plate baffle 151 is annular; the air intake valve plate 152 is arranged between the cylinder head 13 and the air intake valve plate baffle 151, and the air intake valve plate 152 has an air intake port 1521 and a spring plate 1522 movably arranged at the air intake port 1521. When the pump body structure inhales air, the spring plate 1522 opens, and the air intake valve plate 152 also has a valve plate exhaust port 1523 arranged corresponding to the cylinder head exhaust port 131.

[0097] Specifically, the valve plate exhaust port 1523 is located at the spring plate 1522. By such an arrangement, the spring plate 1522 can be effectively prevented from opening during the exhaust process of the pump body structure, and the gas can be prevented from being discharged from the air intake port 1521.

[0098] The specific air intake and exhaust process is as follows: when the pressure inside the cylinder 11 is lower than the pressure outside the cylinder 11, the spring sheet 1522 opens and the gas enters the cylinder 11; when the pressure inside the cylinder 11 is higher than the pressure outside the cylinder 11, the exhaust valve sheet opens and the gas is discharged from the cylinder 11 through the valve sheet exhaust port 1523.

[0099] Optionally, the spring sheet 1522 is cut and formed by a part of the air intake valve sheet 152, and is an integral structure with the air intake valve sheet 152, and the cutout formed after cutting serves as the air intake port 1521. By setting in this way, the sealing performance between the spring sheet 1522 and the air intake valve sheet 152 can be effectively ensured, thereby ensuring the working efficiency of the pump body structure.

[0100] Specifically, the movement of the piston 20 relative to the cylinder 11 satisfies a trigonometric function relationship, and the center of mass of the cylinder 11 is equivalent to a balance plane where the amplitude of the trigonometric function is zero, and the center of mass of the piston 20 continuously moves relative to the balance plane during the movement of the piston 20 to form a trigonometric function curve. In the present application, when the piston 20 is in the initial position, the line connecting the center of mass of the piston 20 and the center of mass of the cylinder 11 is perpendicular to the axial direction of the piston 20 or the cylinder 11. When the piston 20 moves relative to the cylinder 11, the center of mass of the piston 20 moves up and down relative to the center of mass of the cylinder 11, and the position of the center of mass of the piston 20 relative to the center of mass of the cylinder 11 has a functional relationship with the movement time of the piston 20, and the functional relationship graph is a sine function curve or a cosine function curve.

[0101] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0102] 1. Improve the transmission efficiency of the pump structure and increase the displacement of the pump structure;

[0103] 2. Solved the problem of eccentric rotation of the pump structure;

[0104] 3. The structure is simple and reduces air leakage in the pump structure.

[0105] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0106] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0107] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0108] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pump body structure, characterized in that: include: A cylinder assembly (10), wherein the cylinder assembly (10) comprises a cylinder (11); a piston (20), the piston (20) being movably disposed in the cylinder (11); A driving unit (30); a transmission structure (40), wherein the driving portion (30) is drivingly connected to the piston (20) via the transmission structure (40), so that the piston (20) rotates relative to the cylinder (11) and simultaneously moves forward and backward within the cylinder (11) along the pivot axis of the piston (20); The outer peripheral wall of the piston (20) is provided with guide rail grooves (21) connected end to end along the circumferential direction thereof, and the cylinder (11) is provided with a guide structure (111) extending into the guide rail groove (21); The guide groove (21) is located on the outer peripheral wall of the piston (20); the transmission structure (40) is a shaft body; the first end of the shaft body is inserted into the piston (20); the piston (20) comprises: at least one piston radial oil port (211), the piston radial oil port (211) is arranged on the bottom wall of the guide groove (21); and at least one piston center oil port (23), the piston radial oil port (211) is connected to the shaft body located in the piston (20) through the piston center oil port (23); The guide groove (21) is a continuous wave-curved guide groove, and the wave-curved guide groove (21) is a sine-cosine wave-curved guide groove; The number of wave crests and wave troughs of the sine-cosine wave curve guide groove in the circumferential direction of the piston (20) is consistent and both are greater than or equal to 2.

2. The pump body structure according to claim 1, characterized in that: There are one or more guide structures (111), and when the number of the guide structures (111) is plural, the number of the guide structures (111) is no more than the number of the wave peaks, and the plurality of guide structures (111) are located in the same radial plane of the piston (20).

3. The pump body structure according to claim 1, characterized in that: The guide structure (111) is one or more, and the exhaust volume Vone of the pump structure satisfies the following relationship: Vone=K1*K2*A*S Formula (1) Wherein, K1 is a coefficient, and K1 is an integer greater than zero; K2 is the number of the guide structures (111); A is the amplitude of the sine-cosine waveform guide groove; and S is the area of ​​the end surface of the piston (20) facing the compression chamber of the cylinder (11).

4. The pump structure according to any one of claims 1 to 3, characterized in that: The guide structure (111) is a pin extending into the guide rail groove (21).

5. The pump body structure according to any one of claims 1 to 3, characterized in that: A rolling bearing (12) is provided at one end of the guide structure (111) that extends into the guide rail groove (21).

6. The pump structure according to any one of claims 1 to 3, characterized in that: The transmission structure (40) is a shaft body, the shaft body is coaxially arranged with the pivot axis of the piston (20), the piston (20) is sleeved on the shaft body, and when the shaft body rotates, the piston (20) rotates synchronously with the shaft body and slides forward and backward along the shaft body.

7. The pump structure according to claim 6, characterized in that: The first end of the shaft body is inserted into the piston (20), the driving portion (30) is located at the second end of the shaft body, and the end of the shaft body extending into the piston (20) is provided with a first circumferential anti-rotation structure, and the piston (20) is provided with a second circumferential anti-rotation structure that cooperates with the first circumferential anti-rotation structure.

8. The pump structure according to claim 7, characterized in that: The first circumferential anti-rotation structure is a guide groove (50) extending along the axial direction on the outer circumferential surface of the shaft body, and the second circumferential anti-rotation structure is a guide protrusion (60) extending into the guide groove (50), and the guide protrusion (60) moves back and forth in the guide groove (50) as the piston (20) moves; or The second circumferential anti-rotation structure is a guide groove (50) extending along the pivot axis of the piston (20), and the first circumferential anti-rotation structure is a guide protrusion (60) extending into the guide groove (50), and the guide protrusion (60) moves back and forth in the guide groove (50) as the piston (20) moves.

9. The pump structure according to claim 6, characterized in that: The cross section of one end of the shaft body extending into the piston (20) is a non-circular cross section.

10. The pump structure according to claim 9, characterized in that: The outer circumferential surface of the end portion of the shaft body extending into the piston (20) comprises a first radial support arc surface (41), a first circumferential support plane (42), a second circumferential support plane (43), a third circumferential support plane (44), a second radial support arc surface (45), a fourth circumferential support plane (46), a fifth circumferential support plane (47), and a sixth circumferential support plane (48) which are connected end to end in sequence, wherein the first radial support arc surface (41) and the second radial support arc surface (45) are symmetrically arranged, the second circumferential support plane (43) and the fifth circumferential support plane (47) are symmetrically arranged, the first circumferential support plane (42) and the third circumferential support plane (44) are symmetrically arranged, and the fourth circumferential support plane (46) and the sixth circumferential support plane (48) are symmetrically arranged.

11. The pump structure according to claim 7, characterized in that: The cross-sectional area of ​​the first end of the shaft body is greater than the cross-sectional area of ​​the second end of the shaft body.

12. The pump body structure according to any one of claims 1 to 3, characterized in that: The outer peripheral wall of the piston (20) is further provided with an oil guide groove (22), and the piston radial oil port (211) is provided on the bottom wall of the oil guide groove (22).

13. The pump structure according to claim 12, characterized in that: The shaft body has a shaft body central oil port (49) and a shaft body radial oil port (491), and the two are connected, and the shaft body central oil port (49) passes through the axial end surface of the shaft body.

14. The pump structure according to claim 13, characterized in that: The pump body structure also includes a support shaft (70), the support shaft (70) is supported at the second end of the shaft body, the support shaft (70) has a support shaft central oil port (71) and at least one support shaft radial oil port (72), and the support shaft central oil port (71) is connected to the shaft body central oil port (49), and when there are multiple support shaft radial oil ports (72), the multiple support shaft radial oil ports (72) are arranged at intervals along the axial direction of the support shaft (70).

15. The pump structure according to claim 12, characterized in that: The outer peripheral wall of the piston (20) is further provided with a clearance groove (24), and the clearance groove (24) is located between the guide rail groove (21) and the oil guide groove (22).

16. The pump structure according to any one of claims 1 to 3, characterized in that: The cylinder (11) comprises: Cylinder body (112); A supporting lug (113), wherein the supporting lug (113) is arranged on an end surface of the cylinder body (112) facing the transmission structure (40), and the guide structure (111) is arranged on the supporting lug (113).

17. The pump structure according to any one of claims 1 to 3, characterized in that: The cylinder assembly (10) further comprises a cylinder head (13), an exhaust valve plate assembly (14) and an intake valve plate assembly (15); the intake valve plate assembly (15) is arranged between the cylinder (11) and the cylinder head (13); and the exhaust valve plate assembly (14) is arranged at a cylinder head exhaust port (131) of the cylinder head (13).

18. The pump structure according to claim 17, characterized in that: The air intake valve plate assembly (15) comprises: An air intake valve baffle (151), wherein the air intake valve baffle (151) is annular; An air intake valve plate (152), the air intake valve plate (152) being arranged between the cylinder head (13) and the air intake valve plate baffle (151), the air intake valve plate (152) having an air intake port (1521) and a spring plate (1522) movably arranged at the air intake port (1521), the spring plate (1522) opening when the pump body structure inhales air, and the air intake valve plate (152) also having a valve plate exhaust port (1523) arranged corresponding to the cylinder head exhaust port (131).

19. The pump structure according to claim 18, characterized in that: The valve sheet exhaust port (1523) is located on the spring sheet (1522).

20. The pump structure according to claim 18, characterized in that: The spring sheet (1522) is cut and formed from a portion of the air intake valve sheet (152), and is an integral structure with the air intake valve sheet (152), and a cutout formed after cutting serves as the air intake port (1521).

21. The pump structure according to any one of claims 1 to 3, characterized in that: The movement of the piston (20) relative to the cylinder (11) satisfies a trigonometric function relationship, and the center of mass of the cylinder (11) is equivalent to a balance plane where the amplitude of the trigonometric function is zero, and the center of mass of the piston (20) moves continuously relative to the balance plane during the movement of the piston (20) to form a sine function curve or a cosine function curve.

22. A compressor, characterized in that: A pump body structure comprising any one of claims 1 to 21.

23. A heat exchange device, characterized in that: Comprising the compressor as claimed in claim 22.

24. The heat exchange device according to claim 23, characterized in that: The heat exchange device is an air conditioner.

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