Pump body structure, fluid machine and heat exchange equipment

Abstract

The invention provides a pump body structure, fluid machinery and heat exchange equipment, the pump body structure comprises an air cylinder and a roller, the air cylinder is provided with an inner hole, the surface of one side, provided with an air inlet, of the inner wall surface of the inner hole is a bearing surface, the air cylinder is further provided with a liquid passing hole, an end opening, communicated with the inner hole, of the liquid passing hole is formed in the bearing surface, and lubricating liquid is contained in the liquid passing hole. The roller is arranged in the inner hole, and the peripheral face of the roller is attached to the bearing face and makes contact with the lubricating liquid. According to the pump body structure, the liquid passing hole is formed in the bearing face, the lubricating liquid used for lubricating the roller and the bearing face of the air cylinder is provided through the liquid passing hole, abrasion between the roller and the air cylinder is reduced through the lubricating liquid, and then the operation stability of the air cylinder is guaranteed; the problem that the performance and reliability of air conditioning equipment are affected due to abrasion between an air cylinder and a roller of the air conditioning equipment in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field related to power equipment, and in particular to a pump body structure, a fluid machinery and a heat exchange device. Background Art

[0002] Compressors are the power parts of traditional air-conditioning equipment and are used to output power to the outside. However, in some fields, especially in data centers and computer room air-conditioning, liquid pumps are often used instead of compressors to drive the refrigerant to run in the system. The energy efficiency is higher than that of conventional air-conditioning systems. In the industry, this system that uses a pump to drive the refrigerant is called a fluorine pump system, and the pump that drives the refrigerant is called a fluorine pump.

[0003] In the prior art, during the operation of the air-conditioning equipment, the rotary cylinder fluorine pump has a large pressure difference between the suction side and the exhaust side of the cylinder, and between the compression chamber and the suction chamber, which causes uneven force on the roller. The high-pressure side always pushes the roller toward the low-pressure side, and the load-bearing side of the inner circle of the cylinder is subjected to a large force, resulting in increased wear and friction power consumption on the low-pressure load-bearing side of the inner circle of the cylinder, affecting the performance and reliability of the air-conditioning equipment.

[0004] As can be seen from the above, the air conditioning equipment in the prior art has the problem of wear between the cylinder and the roller, which affects the performance and reliability of the air conditioning equipment. Summary of the invention

[0005] The main purpose of the present invention is to provide a pump body structure, a fluid machine and a heat exchange device to solve the problem of wear between the cylinder and the roller of the air-conditioning equipment in the prior art, which affects the performance and reliability of the air-conditioning equipment.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a pump body structure is provided, which includes a cylinder, the cylinder has an inner hole, the inner wall surface of the inner hole has a surface on the side of the air inlet as a bearing surface, the cylinder also has a liquid hole, the end opening of the liquid hole connected to the inner hole is formed on the bearing surface, and the interior of the liquid hole accommodates lubricating liquid; a roller, the roller is arranged inside the inner hole, and the outer peripheral surface of the roller is in contact with the bearing surface and in contact with the lubricating liquid.

[0007] Furthermore, the cylinder has an air intake passage connected to the inner hole, the opening of the air intake passage connected to the inner hole is an air intake port, a plurality of air intake ports are provided and spaced apart along the axial direction of the cylinder, and a bearing surface is formed between two adjacent air intake ports.

[0008] Furthermore, one end of the inlet of the liquid hole is connected to the air intake passage, and along the axial direction of the cylinder, the end opening of the liquid hole connected to the inner hole is arranged on one side of the air intake port.

[0009] Furthermore, the axial air inlet of the cylinder is arranged at both ends of the inner wall surface of the inner hole, the height of the cylinder is H1, the height of the bearing surface is H2, and H1 and H2 satisfy 0.1≤H1 / H2≤0.9.

[0010] Furthermore, the distance between the liquid hole and the top end of the bearing surface is H3, the distance between the liquid hole and the bottom end of the bearing surface is H4, and H2, H3, and H4 satisfy 0.2≤(H3+H4) / H2≤0.8.

[0011] Furthermore, 0.5mm≤H3≤5mm; 0.5mm≤H4≤5mm.

[0012] Furthermore, the distance between the two circumferential edges of the air inlet is B1, the distance between the liquid hole and one of the edges is B2, and the distance between the liquid hole and the other edge is B3, wherein B1, B2 and B3 satisfy 0.2≤(B2+B3) / B1≤0.8.

[0013] Furthermore, 0.5mm≤B1≤5mm; 0.5mm≤B2≤5mm.

[0014] Further, one or more liquid holes are arranged along the circumferential direction of the cylinder; and / or one or more liquid holes are arranged along the axial direction of the cylinder.

[0015] Furthermore, the opening shape of the liquid-passing hole is one of circular, rectangular, triangular, elliptical, waist-shaped, square, and conical.

[0016] Furthermore, the roller has a first part, a middle part and a second part which are arranged in sequence along the circumference of the cylinder, the first part forms a first cavity, the second part forms a second cavity, the first cavity and the second cavity are arranged on both sides of the height direction of the middle part, and the outer wall surface of the middle part is in contact with the lubricating liquid inside the liquid hole.

[0017] Furthermore, the first cavity is the first channel, the second cavity is the second channel, the inner circumferential wall of the cylinder blocks the end openings of the first channel and the second channel, the pump body structure also includes a first slider and a second slider, the first slider is slidably arranged inside the first cavity, the second slider is slidably arranged inside the second cavity, the first slider, the first part and the inner circumferential wall of the cylinder form a first compression chamber, and the second slider, the second part and the inner circumferential wall of the cylinder form a second compression chamber.

[0018] Furthermore, the bearing surface is the low-pressure side, and the inner wall surface of the inner hole also has a high-pressure side arranged opposite to the low-pressure side. The high-pressure side and the low-pressure side are arranged at intervals along the circumference of the cylinder. The cylinder also has an exhaust port connected to the inner hole, and the opening connecting the exhaust port and the inner hole is arranged on the high-pressure side.

[0019] According to another aspect of the present invention, a fluid machine is provided, the fluid machine comprising the above-mentioned pump body structure.

[0020] According to another aspect of the present invention, a heat exchange device is provided, and the heat exchange device includes the above-mentioned fluid machinery.

[0021] According to the technical solution of the present invention, the pump body structure includes a cylinder and a roller, the cylinder has an inner hole, the inner wall surface of the inner hole has a surface on the side of the air inlet as a bearing surface, the cylinder also has a liquid hole, the end opening of the liquid hole connected to the inner hole is formed on the bearing surface, the interior of the liquid hole contains lubricating liquid, the roller is arranged inside the inner hole, and the outer peripheral surface of the roller is in contact with the bearing surface and in contact with the lubricating liquid.

[0022] From the above, it can be seen that the pump body structure of the present application adopts a liquid hole set on the bearing surface of the cylinder to realize lubrication of the roller and the bearing surface through the lubricating liquid inside the liquid hole, and then lubricates the contact part between the roller and the bearing surface, thereby reducing the wear and friction power consumption between the roller and the cylinder, ensuring the energy efficiency and reliability of the pump body structure, and also improving the stability and reliability of the air-conditioning equipment using the pump body structure.

[0023] The present application injects lubricating liquid into the liquid passage hole so that the roller can contact with the lubricating liquid. The lubricating liquid also has sealing and lubricating functions, thereby helping to reduce the friction power consumption of the pump body structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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:

[0025] Figure 1 An exploded view of the pump structure of the present invention is shown;

[0026] Figure 2 A cross-sectional view showing the pump structure of the present invention;

[0027] Figure 3 A three-dimensional structural schematic diagram of a cylinder of the present invention is shown;

[0028] Figure 4 One of the cross-sectional views of the pump body structure of the present invention is shown;

[0029] Figure 5 A side view of the cylinder of the present invention is shown;

[0030] Figure 6 A side view of the cylinder of the present invention is shown, wherein the liquid hole opening is rectangular;

[0031] Figure 7A side view of the cylinder of the present invention is shown, wherein the opening of the liquid hole is circular;

[0032] Figure 8 A side view of the cylinder of the present invention is shown, wherein the liquid hole opening is oval;

[0033] Fig. 9 A side view of the cylinder of the present invention is shown, wherein the liquid hole opening is triangular;

[0034] Fig.10 A side view of the cylinder of the present invention is shown, wherein the liquid hole opening is square;

[0035] Fig.11 It shows a schematic structural diagram of three liquid holes arranged on the cylinder of the present invention;

[0036] Fig.12 It shows a schematic structural diagram of a cylinder provided with a plurality of liquid holes according to the present invention;

[0037] Fig.13 The schematic diagram of the structure of the liquid passage hole with multiple micro-holes arranged on the cylinder of the present invention is shown.

[0038] The above drawings include the following reference numerals:

[0039] 10. Cylinder; 110. Inner hole; 120. Liquid hole; 130. Bearing surface; 140. Inlet port; 150. Exhaust port; 20. Roller; 210. First part; 211. First cavity; 220. Middle part; 230. Second part; 231. Second cavity; 30. First slider; 40. Second slider; 50. Crankshaft. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] Embodiment 1

[0044] In order to solve the problem that the performance and reliability of the air-conditioning equipment are affected by the wear between the cylinder and the roller in the prior art air-conditioning equipment, the present invention provides a pump body structure.

[0045] The pump body structure in this embodiment is a fluorine pump, which is used to be installed inside the air conditioner to provide power. Especially in the fields of data centers, computer room air conditioners, etc., the fluorine pump has a good power effect.

[0046] like Figures 1 to 13 As shown, the pump body structure includes a cylinder 10 and a roller 20. The cylinder 10 has an inner hole 110. The inner wall surface of the inner hole 110 has a surface on the side of the air inlet 140 as a bearing surface 130. The cylinder 10 also has a liquid hole 120. The end opening of the liquid hole 120 connected to the inner hole 110 is formed on the bearing surface 130. The interior of the liquid hole 120 accommodates lubricating liquid. The roller 20 is arranged inside the inner hole 110, and the outer peripheral surface of the roller 20 is in contact with the bearing surface 130 and in contact with the lubricating liquid.

[0047] In this embodiment, the pump body structure also includes a shell, and the cylinder 10 is arranged inside the shell. The interior of the shell has a liquid supply mechanism connected to the liquid hole 120. The liquid supply mechanism is a component that can provide lubricating oil, and specifically can be a combination of an oil pipe and an oil pump.

[0048] The bearing surface 130 is Figure 4 The S surface is shown.

[0049] In this embodiment, the roller 20 is rotatably disposed inside the inner hole 110 , and friction exists between the roller 20 and the bearing surface 130 of the inner hole 110 of the cylinder 10 .

[0050] It is understandable that the roller 20 is subjected to unbalanced pressure inside the cylinder 10, which causes the roller 20 to have a tendency to tilt toward the bearing surface 130 of the cylinder 10, thereby causing wear between the roller 20 and the bearing surface 130. The pump body structure provided in this application is used to overcome the above problems.

[0051] Specifically, the pump body structure of the present application adopts a liquid hole 120 set on the bearing surface 130 of the cylinder 10, so as to lubricate the roller 20 and the bearing surface 130 through the lubricating liquid inside the liquid hole 120, and then lubricate the contact part between the roller 20 and the bearing surface 130, thereby reducing the wear and friction power consumption between the roller 20 and the cylinder 10, ensuring the energy efficiency and reliability of the pump body structure, and also improving the stability and reliability of the air-conditioning equipment using the pump body structure.

[0052] In this embodiment, by injecting lubricating liquid into the liquid passage hole 120, the roller 20 can contact with the lubricating liquid, and the lubricating liquid also has the functions of sealing and lubricating, thereby facilitating reducing the friction power consumption of the pump structure.

[0053] like Figures 1 to 4 As shown, the cylinder 10 has an intake passage connected to the inner hole 110 , and the opening connecting the intake passage and the inner hole 110 is an intake port 140 . There are multiple intake ports 140 and they are spaced apart along the axial direction of the cylinder 10 , and a bearing surface 130 is formed between two adjacent intake ports 140 .

[0054] Specifically, a bearing surface 130 is formed between two adjacent air inlets 140 along the axial direction of the cylinder 10. The bearing surface 130 serves to support the limiting roller 20. The present application sets a liquid hole 120 on the bearing surface 130, and realizes lubrication between the bearing surface 130 and the roller 20 through the lubricating oil inside the liquid hole 120, which is beneficial to reduce wear and improve the operating stability of the roller 20, thereby improving the operating stability of the pump body structure.

[0055] In this embodiment, two or more air inlets 140 may be provided, and the air inlets 140 may be provided as required.

[0056] In this embodiment, one inlet end of the liquid hole 120 is connected to the air intake passage, and along the axial direction of the cylinder 10 , the end opening of the liquid hole 120 connected to the inner hole 110 is arranged on the bearing surface 130 .

[0057] The inlet of the liquid hole 120 is connected to the air inlet channel, which is conducive to liquid injection and convenient operation.

[0058] like Figures 1 to 5 As shown, in this embodiment, two air inlets 140 are provided, and the air inlets 140 are provided at two ends of the inner wall surface of the inner hole 110 along the axial direction of the cylinder 10 .

[0059] Among them, the height of the cylinder 10 is H1, the height of the bearing surface 130 is H2, and H1 and H2 satisfy 0.1≤H1 / H2≤0.9. When H1 and H2 satisfy 0.1≤H1 / H2≤0.9, it is beneficial to ensure that the fluorine pump has no suction loss during operation, and at the same time, the cylinder 10 and the roller 20 have a certain bearing surface 130 area to ensure the reliability of the fluorine pump.

[0060] In this embodiment, the distance between the liquid hole 120 and the top of the bearing surface 130 is H3, the distance between the liquid hole 120 and the bottom of the bearing surface 130 is H4, and H2, H3, and H4 satisfy 0.2≤(H3+H4) / H2≤0.8. When H2, H3, and H4 satisfy 0.2≤(H3+H4) / H2≤0.8, it is beneficial to ensure the reliability of the fluorine pump while playing a certain lubrication and sealing role, thereby improving the energy efficiency and reliability of the fluorine pump.

[0061] Specifically, 0.5mm≤H3≤5mm, 0.5mm≤H4≤5mm. At this time, the lubrication effect between the cylinder 10 and the roller 20 is ensured while meeting the bearing surface 130 area requirements of the cylinder 10 and the roller 20. Among them, H3 can be 1mm, 2mm, 3mm, 4mm, 5mm, and H4 can be 1mm, 2mm, 3mm, 4mm, 5mm. Of course, H3 and H4 can be the same or different.

[0062] like Figures 1 to 5 As shown, the distance between the two circumferential edges of the air inlet 140 is B1, the distance between the liquid hole 120 and one of the edges is B2, and the distance between the liquid hole 120 and the other edge is B3, wherein B1, B2 and B3 satisfy 0.2≤(B2+B3) / B1≤0.8.

[0063] Specifically, when B1, B2 and B3 satisfy 0.2≤(B2+B3) / B1≤0.8, it is beneficial to ensure the reliability of the fluorine pump while playing a certain lubrication and sealing role, thereby improving the energy efficiency and reliability of the fluorine pump.

[0064] In this embodiment, B1 and B2 satisfy 0.5mm≤B1≤5mm, 0.5mm≤B2≤5mm, so as to ensure that the cylinder 10 and the roller 20 have a certain bearing surface 130 area, and at the same time ensure that the liquid hole 120 and the compression chamber on the roller 20 have a certain sealing angle in the circumferential direction.

[0065] like Figure 1 As shown, the roller 20 has a first part 210, a middle part 220 and a second part 230 which are sequentially arranged along the axial direction of the cylinder 10, the first part 210 forms a first cavity 211, the second part 230 forms a second cavity 231, the first cavity 211 and the second cavity 231 are arranged on both sides of the height direction of the middle part 220, and the outer wall surface of the middle part 220 blocks the liquid hole 120.

[0066] Specifically, the middle portion 220 is used to block the liquid hole 120, thereby ensuring that there is no leakage between the liquid hole 120 and the roller 20, thereby ensuring the sealing of the structure.

[0067] like Figure 1 As shown, the first cavity 211 is the first channel, the second cavity 231 is the second channel, the inner peripheral wall of the cylinder 10 blocks the end openings of the first channel and the second channel, and the first cavity 211 and the second cavity 231 are formed into two installation spaces.

[0068] Specifically, the pump body structure also includes a first slider 30 and a second slider 40. The first slider 30 is slidably arranged inside the first cavity 211, and the second slider 40 is slidably arranged inside the second cavity 231. The first slider 30, the first part 210 and the inner circumferential wall of the cylinder 10 form a first compression chamber, and the second slider 40, the second part 230 and the inner circumferential wall of the cylinder 10 form a second compression chamber.

[0069] The pump body structure further includes a crankshaft 50 , which passes through the first slider 30 , the roller 20 and the second slider 40 , and provides driving force for the first slider 30 , the roller 20 and the second slider 40 to move.

[0070] In this embodiment, the first compression chamber and the second compression chamber are respectively arranged on both sides of the axial direction of the middle part 220, so that gas compression can be achieved by moving the slider inside the channel.

[0071] In this embodiment, if Figures 6 to 13 As shown, there can be one or more liquid holes 120. When there are multiple liquid holes 120, the multiple liquid holes 120 can be spaced along the circumference of the cylinder 10, or can be spaced along the axial direction of the cylinder 10, or can be spaced along both the circumference and the axial direction of the cylinder 10. The provision of multiple liquid holes 120 is conducive to improving the uniformity of the force on the roller 20, thereby better ensuring the stable operation of the roller 20. When there are multiple liquid holes 120, in order to increase the number of liquid holes 120, the liquid holes 120 can be provided in a microporous structure.

[0072] In this embodiment, the opening shape of the liquid hole 120 is one of circular, rectangular, triangular, elliptical, waist-shaped, square, and conical. When multiple liquid holes 120 are provided, the shapes of the multiple liquid holes 120 can be the same or different.

[0073] In this embodiment, the bearing surface 130 is the low-pressure side, and the inner wall surface of the inner hole 110 also has a high-pressure side arranged opposite to the low-pressure side. The high-pressure side and the low-pressure side are arranged at intervals along the circumference of the cylinder 10. The cylinder 10 also has an exhaust port 150 connected to the inner hole 110, and the opening of the exhaust port 150 connected to the inner hole 110 is arranged on the high-pressure side.

[0074] It is understandable that in this embodiment, the roller 20 is subjected to different pressures on the low-pressure side and the high-pressure side inside the cylinder 10, resulting in an unbalanced force tilting toward the low-pressure side, which in turn causes wear between the roller 20 and the low-pressure side of the cylinder 10. The pump body structure provided in the present application adopts a liquid hole 120 provided on the low-pressure side of the cylinder 10 to achieve lubrication of the cylinder 10 and the roller 20 through the lubricating liquid inside the liquid hole 120, thereby reducing the wear and friction power consumption between the roller 20 and the cylinder 10, ensuring the energy efficiency and reliability of the pump body structure, and also improving the stability and reliability of the air-conditioning equipment using the pump body structure.

[0075] Embodiment 2

[0076] This embodiment provides a fluid machine, and the fluid machine includes the pump body structure in the first embodiment.

[0077] Embodiment 3

[0078] This embodiment provides a heat exchange device, and the heat exchange device includes the fluid machinery in the second embodiment.

[0079] In this embodiment, the heat exchange device is an air conditioner.

[0080] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0081] The pump body structure of the present application adopts a method of setting a liquid hole 120 on the bearing surface 130 of the cylinder 10, so as to lubricate the roller 20 and the bearing surface 130 through the lubricating liquid inside the liquid hole 120, and then lubricate the contact part between the roller 20 and the bearing surface 130, thereby reducing the wear and friction power consumption between the roller 20 and the cylinder 10, ensuring the energy efficiency and reliability of the pump body structure, and also improving the stability and reliability of the air-conditioning equipment using the pump body structure.

[0082] In the present application, lubricating liquid is injected into the liquid passage hole 120 , so that the roller 20 can contact with the lubricating liquid. The lubricating liquid also has the functions of sealing and lubrication, thereby helping to reduce the friction power consumption of the pump body structure.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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 (10), wherein the cylinder (10) has an inner hole (110), the inner wall surface of the inner hole (110) having a surface on the side of the air inlet (140) as a bearing surface (130), the cylinder (10) also has a liquid hole (120), an end opening of the liquid hole (120) communicating with the inner hole (110) is formed on the bearing surface (130), and a lubricating liquid is contained inside the liquid hole (120); A roller (20) is arranged inside the inner hole (110), and an outer peripheral surface of the roller (20) is in contact with the bearing surface (130) and in contact with the lubricating liquid.

2. The pump body structure according to claim 1, characterized in that: The cylinder (10) has an air intake passage connected to the inner hole (110); the opening of the air intake passage connected to the inner hole (110) is an air intake port (140); a plurality of air intake ports (140) are provided and spaced apart along the axial direction of the cylinder (10); and the bearing surface (130) is formed between two adjacent air intake ports (140).

3. The pump body structure according to claim 2, characterized in that: One inlet end of the liquid hole (120) is connected to the air intake channel, and along the axial direction of the cylinder (10), the end opening of the liquid hole (120) connected to the inner hole (110) is arranged on the bearing surface (130).

4. The pump structure according to claim 2, characterized in that: The air inlet (140) is arranged at two ends of the inner wall surface of the inner hole (110) along the axial direction of the cylinder (10). The height of the cylinder (10) is H1, the height of the bearing surface (130) is H2, and H1 and H2 satisfy 0.1≤H1 / H2≤0.

9.

5. The pump structure according to claim 4, characterized in that: The distance between the liquid passage hole (120) and the top end of the bearing surface (130) is H3, the distance between the liquid passage hole (120) and the bottom end of the bearing surface (130) is H4, and H2, H3, and H4 satisfy 0.2≤(H3+H4) / H2≤0.

8.

6. The pump structure according to claim 5, characterized in that: 0.5mm≤H3≤5mm; 0.5mm≤H4≤5mm.

7. The pump structure according to claim 1, characterized in that: The distance between the two circumferential edges of the air inlet (140) is B1, the distance between the liquid hole (120) and one of the edges is B2, and the distance between the liquid hole (120) and the other edge is B3, wherein B1, B2 and B3 satisfy 0.2≤(B2+B3) / B1≤0.

8.

8. The pump structure according to claim 7, characterized in that: 0.5mm≤B1≤5mm; 0.5mm≤B2≤5mm.

9. The pump body structure according to any one of claims 1 to 8, characterized in that: One or more liquid passage holes (120) are provided along the circumference of the cylinder (10); and / or One or more liquid passage holes (120) are arranged along the axial direction of the cylinder (10).

10. The pump structure according to any one of claims 1 to 8, characterized in that: The opening shape of the liquid passage hole (120) is one of a circle, a rectangle, a triangle, an ellipse, a waist, a square, and a cone.

11. The pump structure according to any one of claims 1 to 8, characterized in that: The roller (20) comprises a first part (210), a middle part (220) and a second part (230) which are arranged in sequence along the circumferential direction of the cylinder (10); the first part (210) forms a first cavity (211); the second part (230) forms a second cavity (231); the first cavity (211) and the second cavity (231) are arranged on both sides of the middle part (220) in a height direction; and the outer wall surface of the middle part (220) contacts the lubricating liquid inside the liquid hole (120).

12. The pump structure according to claim 11, characterized in that: The first cavity (211) is a first channel, and the second cavity (231) is a second channel. The inner peripheral wall of the cylinder (10) blocks the end openings of the first channel and the second channel. The pump body structure also includes a first slider (30) and a second slider (40). The first slider (30) is slidably arranged inside the first cavity (211), and the second slider (40) is slidably arranged inside the second cavity (231). The first slider (30), the first part (210) and the inner peripheral wall of the cylinder (10) form a first compression chamber, and the second slider (40), the second part (230) and the inner peripheral wall of the cylinder (10) form a second compression chamber.

13. The pump structure according to any one of claims 1 to 8, characterized in that: The bearing surface (130) is a low-pressure side, and the inner wall surface of the inner hole (110) also has a high-pressure side arranged opposite to the low-pressure side, and the high-pressure side and the low-pressure side are arranged at intervals along the circumference of the cylinder (10). The cylinder (10) also has an exhaust port (150) arranged in communication with the inner hole (110), and the opening of the exhaust port (150) in communication with the inner hole (110) is arranged on the high-pressure side.

14. A fluid machine, characterized in that: The fluid machine comprises the pump body structure according to any one of claims 1 to 13.

15. A heat exchange device, characterized in that: The heat exchange equipment includes the fluid machinery according to claim 14.

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