Pump body assembly, fluid machine and heat exchange device

Abstract

The application provides a pump body assembly, a fluid machine and a heat exchange device. The pump body assembly comprises a cylinder, the cylinder having a first sliding vane groove; a roller, the roller being arranged in the cylinder and forming a first compression cavity with an inner wall of the cylinder; a first sliding vane, the first sliding vane being in sliding connection with the first sliding vane groove and at least a part of the first sliding vane being accommodated in the first sliding vane groove, a top of the first sliding vane being connected with the roller; a crankshaft, the crankshaft having an eccentric part, at least a part of an outer periphery of the eccentric part being cut off to form a second compression cavity between the roller and the outer periphery of the eccentric part; and a second sliding vane, the roller having a second sliding vane groove, the second sliding vane being in sliding connection with the second sliding vane groove and at least a part of the second sliding vane being accommodated in the second sliding vane groove, a top of the second sliding vane being connected with the eccentric part. The application solves the problem of low cylinder volume utilization rate of the pump body assembly in the prior art.

Description

Technical Field

[0001] This invention relates to the field of heat exchange equipment technology, and more specifically, to a pump assembly, fluid machinery, and heat exchange equipment. Background Technology

[0002] In existing technologies, heat exchange equipment is already very common, and heat exchange in current equipment is achieved by pump components in fluid machinery. Common heat exchange equipment and fluid machinery include air conditioners and compressors. Existing rotary single-cylinder compressors experience a significant decrease in heating capacity when operating under low-temperature conditions. Therefore, two-stage compression and vapor injection enthalpy enhancement technologies have emerged in the market to meet users' heating needs in winter or low-temperature environments. These technologies can improve the heating capacity of air conditioning circulation systems at low temperatures, but they also increase the complexity of the structure, leading to a significant increase in compressor costs.

[0003] Existing single-cylinder multi-chamber rotary compressors typically employ a method of dividing the cylinder's crescent-shaped volume chamber into several independent compression chambers using sliding vanes. This method results in the added vanes occupying the crescent-shaped volume chamber, leading to a decrease in cylinder volume utilization and requiring a larger cylinder size for the same displacement.

[0004] As can be seen from the above, the existing technology has the problem of low cylinder volume utilization rate of the pump body assembly. Summary of the Invention

[0005] The main objective of this invention is to provide a pump body assembly, fluid machinery, and heat exchange equipment to solve the problem of low cylinder volume utilization in existing pump body assemblies.

[0006] To achieve the above objectives, according to one aspect of the present invention, a pump body assembly is provided, comprising: a cylinder having a first vane groove; a roller disposed within the cylinder and forming a first compression chamber with the inner wall of the cylinder; a first vane slidably connected to the first vane groove and at least a portion of the first vane being accommodated within the first vane groove, the top of the first vane being connected to the roller; a crankshaft having an eccentric portion, at least a portion of the outer periphery of the eccentric portion being cut off to form a second compression chamber with the roller and the outer periphery of the eccentric portion; and a second vane, the roller having a second vane groove, the second vane slidably connected to the second vane groove and at least a portion of the second vane being accommodated within the second vane groove, the top of the second vane being connected to the eccentric portion.

[0007] Furthermore, the first sliding plate is hinged to the roller; or the first sliding plate and the roller are integrally formed.

[0008] Furthermore, the pump body assembly also includes an elastic element that is accommodated in the second vane groove and abuts against the tail of the second vane.

[0009] Furthermore, the central angle α corresponding to the cut arc of the eccentric part satisfies: α≤180°.

[0010] Furthermore, the central angle α corresponding to the cut-off arc of the eccentric part satisfies: α≤120°.

[0011] Furthermore, the angle θ between the line connecting the rotation center of the crankshaft and the point on the eccentric circle of the eccentric part that is closest to the rotation center of the crankshaft, and between the rotation center of the crankshaft and the midpoint of the cut-off arc of the eccentric part, satisfies: θ≥180°.

[0012] Furthermore, the angle θ between the line connecting the rotation center of the crankshaft and the point on the eccentric circle of the eccentric part that is closest to the rotation center of the crankshaft, and between the rotation center of the crankshaft and the midpoint of the cut-off arc of the eccentric part, satisfies: 210°≤θ≤300°.

[0013] Furthermore, the eccentric circle of the eccentric part includes a retracted section, an extended buffer section, an extended section, and a retracted buffer section. When the second slider contacts the extended section, the extension length is h. When the second slider contacts the extended buffer section and the retracted buffer section, the extension length is 0.2h. The phase angle between the extended buffer section and the retracted buffer section is less than or equal to 30°.

[0014] Furthermore, the eccentric portion has a second exhaust port communicating with the second compression chamber, and the pump body assembly also includes an exhaust valve assembly, which is disposed on the eccentric portion and communicates with the second exhaust port.

[0015] Furthermore, the pump body assembly also includes a first flange and a second flange, with the cylinder located between the first flange and the second flange. The eccentric portion also has a second intake port that communicates with the second compression chamber. The first flange has an air guide groove and a first intake channel. The exhaust valve assembly communicates with the air guide groove, and the second intake port communicates with the first intake channel.

[0016] Furthermore, the air guide groove is a waist-shaped groove extending circumferentially along the eccentric portion.

[0017] Furthermore, the central shaft of the crankshaft has a second intake channel, which is connected to both the second intake port and the first intake channel.

[0018] Furthermore, the first flange also has a gas connection cavity, which is annular and arranged along the circumference of the crankshaft. The gas connection cavity is connected to the first intake channel and the second intake channel respectively.

[0019] Furthermore, the central shaft of the crankshaft has a lubricating oil passage that communicates with the friction pair of the oil sump and pump body assembly.

[0020] According to another aspect of the invention, a fluid machine is provided, comprising the pump body assembly described above.

[0021] According to another aspect of the present invention, a heat exchange device is provided, comprising the fluid machinery described above.

[0022] Furthermore, the heat exchange equipment also includes a condenser, a flash evaporator, an evaporator, a first throttling element, a second throttling element, a first on-off valve, and a second on-off valve. The evaporator and condenser are respectively connected to the inlet and outlet of the fluid machinery. The first throttling element is respectively connected to the outlet of the condenser and the inlet of the flash evaporator. The second throttling element is respectively connected to the liquid refrigerant outlet of the flash evaporator and the inlet of the evaporator. The first on-off valve is respectively connected to the gas refrigerant outlet of the flash evaporator and the gas supply inlet channel of the fluid machinery. The second on-off valve is respectively connected to the outlet of the evaporator and the gas supply inlet channel of the fluid machinery.

[0023] Furthermore, the heat exchange equipment also includes a third on / off valve, which is connected to the outlet of the fluid machinery and the air supply channel of the fluid machinery, respectively.

[0024] The pump assembly using the technical solution of this invention includes a cylinder, a roller, a first vane, a crankshaft, and a second vane. The cylinder has a first vane groove. The roller is disposed inside the cylinder and forms a first compression chamber with the inner wall of the cylinder. The first vane is slidably connected to the first vane groove, and at least a portion of the first vane is accommodated within the first vane groove. The top of the first vane is connected to the roller. The crankshaft has an eccentric portion, and at least a portion of the outer periphery of the eccentric portion is cut off so that the roller and the outer periphery of the eccentric portion form a second compression chamber. The roller has a second vane groove, and the second vane is slidably connected to the second vane groove, and at least a portion of the second vane is accommodated within the second vane groove. The top of the second vane is connected to the eccentric portion. In this way, a second compression chamber is formed between the roller and the outer periphery of the eccentric portion. This allows for the addition of an independent second working chamber within the same cylinder without increasing the volume of the pump assembly itself, and without affecting the displacement of the first working chamber. This improves the volume utilization rate of the cylinder and solves the problem of low cylinder volume utilization rate in the prior art. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0026] Figure 1 A schematic diagram of the pump body assembly in Embodiment 1 of the present invention is shown;

[0027] Figure 2 A schematic diagram of the eccentric portion in Embodiment 1 of the present invention is shown;

[0028] Figure 3 A schematic diagram of the structure at the first flange in Embodiment 1 of the present invention is shown;

[0029] Figure 4 A schematic diagram of the heat exchange device in Embodiment 1 of the present invention is shown;

[0030] Figure 5 A schematic diagram of the heat exchange device in Embodiment 2 of the present invention is shown.

[0031] The above figures include the following reference numerals:

[0032] 10. Cylinder; 11. First vane groove; 12. First compression chamber; 13. First intake port; 14. First exhaust port; 20. Roller; 21. Second vane groove; 22. Second compression chamber; 30. First vane; 40. Crankshaft; 41. Eccentric portion; 411. Cut-off arc; 412. Retracted section; 413. Extended buffer section; 414. Extended section; 415. Retracted buffer section; 416. Second intake port; 417. Second exhaust port; 42. Central shaft; 421. Second intake channel; 422, Lubricating oil channel; 50, Second sliding vane; 60, Elastic element; 70, Exhaust valve assembly; 80, First flange; 81, Air guide groove; 82, First intake channel; 83, Gas connection chamber; 100, Fluid machinery; 110, Condenser; 120, Flash evaporator; 130, Evaporator; 140, First throttling element; 150, Second throttling element; 160, First on / off valve; 170, Second on / off valve; 180, Third on / off valve; 190, Liquid distributor. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. 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.

[0034] To address the problem of low cylinder volume utilization in existing pump body assemblies, this invention provides a pump body assembly, fluid machinery, and heat exchange equipment.

[0035] Example 1

[0036] like Figure 1As shown, the pump assembly includes a cylinder 10, a roller 20, a first vane 30, a crankshaft 40, and a second vane 50. The cylinder 10 has a first vane groove 11. The roller 20 is disposed within the cylinder 10 and forms a first compression chamber 12 with the inner wall of the cylinder 10. The first vane 30 is slidably connected to the first vane groove 11, and at least a portion of the first vane 30 is accommodated within the first vane groove 11; the top of the first vane 30 is connected to the roller 20. The crankshaft 40 has an eccentric portion 41, at least a portion of the outer periphery of the eccentric portion 41 is cut off, so that the roller 20 and the outer periphery of the eccentric portion 41 form a second compression chamber 22. The roller 20 has a second vane 50, which is slidably connected to the second vane groove 21, and at least a portion of the second vane 50 is accommodated within the second vane groove 21; the top of the second vane 50 is connected to the eccentric portion 41.

[0037] The pump assembly includes a cylinder 10, a roller 20, a first vane 30, a crankshaft 40, and a second vane 50. The cylinder 10 has a first vane groove 11. The roller 20 is disposed inside the cylinder 10 and forms a first compression chamber 12 with the inner wall of the cylinder 10. The first vane 30 is slidably connected to the first vane groove 11, and at least a portion of the first vane 30 is accommodated in the first vane groove 11. The top of the first vane 30 is connected to the roller 20. The crankshaft 40 has an eccentric portion 41, and at least a portion of the outer periphery of the eccentric portion 41 is cut off so that the roller 20 and the outer periphery of the eccentric portion 41 form a... A second compression chamber 22 is formed. The roller 20 has a second sliding vane 50, which is slidably connected to a second sliding vane groove 21 and at least a portion of the second sliding vane 50 is accommodated in the second sliding vane groove 21. The top of the second sliding vane 50 is connected to the eccentric portion 41. In this way, a second compression chamber 22 is formed on the outer periphery of the roller 20 and the eccentric portion 41. This allows for the addition of an independent second working chamber in the same cylinder without increasing the volume of the pump body assembly itself, and without affecting the displacement of the first working chamber, thereby improving the volume utilization rate of the cylinder and the cylinder volume utilization rate of the pump body assembly.

[0038] In this embodiment, the first sliding plate 30 is hinged to the roller 20. Of course, in order to ensure the connection between the roller 20 and the first sliding plate 30, the first sliding plate 30 and the roller 20 can also be integrally formed.

[0039] like Figure 1 As shown, the pump body assembly also includes an elastic element 60, which is accommodated in the second vane groove 21 and abuts against the tail of the second vane 50.

[0040] In this embodiment, the elastic element 60 is a spring. The spring force provides the power source for the second slider 50 to move along the second slider groove 21.

[0041] like Figure 2As shown, in this embodiment, the central angle α corresponding to the cut arc 411 of the eccentric portion 41 satisfies: α≤180°. It can be understood that the cut arc 411 is the arc of the outer periphery after a portion of the eccentric portion 41 has been cut off.

[0042] Furthermore, in a preferred embodiment, the central angle α corresponding to the cut arc 411 of the eccentric portion 41 satisfies: α≤120°.

[0043] By setting the central angle α within the aforementioned range, the crankshaft 40 and the roller 20 can have a sufficient engagement angle, which is beneficial for the formation of an oil film between them to reduce friction. If the central angle α is greater than 180°, it cannot be guaranteed that the inner circle of the roller 20 and the outer circle of the eccentric part 41 will fit together, which may easily lead to the roller 20 having a wobble allowance on the crankshaft 40, thereby reducing the compression efficiency and the service life of the pump body assembly.

[0044] In this embodiment, the angle θ between the line connecting the rotation center of the crankshaft 40 and the point on the eccentric circle of the eccentric portion 41 closest to the rotation center of the crankshaft 40, and the line connecting the rotation center of the crankshaft 40 and the midpoint of the cut arc 411 of the eccentric portion 41, satisfies: θ ≥ 180°. Specifically, the closest point of the rotation center of the crankshaft 40 to the eccentric portion 41 is set as 0°, and the farthest point is set as 180°. The angle θ is the angle between the midpoint of the cut arc 411 closest to the rotation center of the crankshaft 40 and the 0° point. Figure 2 The included angle θ is 180°. Due to the friction pair between the eccentric part 41 and the roller 20 during the compression process of the fluid machinery, the main force angle of the pressure generated by the operation of the first compression chamber 12 is between 0° and 150° in the eccentric part 41. To ensure the force-bearing area of ​​the crankshaft 40, the included angle θ must be at least greater than 180 degrees. The cut-off span ensures a certain angle, making the force-bearing angle of the crankshaft 40 sufficiently long.

[0045] Furthermore, in a preferred embodiment, the angle θ between the line connecting the rotation center of the crankshaft 40 and the point on the eccentric circle of the eccentric portion 41 closest to the rotation center of the crankshaft 40, and the line connecting the rotation center of the crankshaft 40 and the midpoint of the cut arc 411 of the eccentric portion 41, satisfies: 210°≤θ≤300°.

[0046] like Figure 2As shown, the eccentric circle of the eccentric portion 41 includes a retracted section 412, an extended buffer section 413, an extended section 414, and a retracted buffer section 415. The extension length of the second sliding plate 50 when it contacts the extended section 414 is h. Therefore, the extension length of the second sliding plate 50 when it contacts the extended buffer section 413 and the retracted buffer section 415 is 0.2h, and the phase angle between the extended buffer section 413 and the retracted buffer section 415 is less than or equal to 30°. The profile formed by the above arrangement can mitigate the vibration and noise caused by the impact of excessive extension speed of the second sliding plate 50, thereby avoiding excessive impact from the second sliding plate 50 on the cylinder 10 and extending the service life of the cylinder.

[0047] like Figure 1 As shown, the eccentric portion 41 has a second exhaust port 417 communicating with the second compression chamber 22. The pump body assembly also includes an exhaust valve assembly 70, which is disposed on the eccentric portion 41 and communicates with the second exhaust port 417. Specifically, the exhaust valve assembly 70 includes an exhaust groove, an exhaust valve plate, and an exhaust baffle, serving as a check valve for the second compression chamber 22 to prevent high-pressure refrigerant from flowing back into the second compression chamber 22. The compressed gas in the second compression chamber 22 reaches the exhaust valve assembly 70 through the second exhaust port 417, thereby releasing the compressed gas from the second compression chamber 22.

[0048] like Figure 3 As shown, the pump body assembly also includes a first flange 80 and a second flange. The cylinder 10 is located between the first flange 80 and the second flange. The eccentric portion 41 also has a second intake port 416 communicating with the second compression chamber 22. The first flange 80 has an air guide groove 81 and a first intake passage 82, the exhaust valve assembly 70 is communicating with the air guide groove 81, and the second intake port 416 is communicating with the first intake passage 82.

[0049] In this embodiment, the air guide groove 81 is a waist-shaped groove extending circumferentially along the eccentric portion 41.

[0050] like Figure 1 and Figure 3 As shown, the central shaft 42 of the crankshaft 40 has a second intake channel 421, which is connected to the second intake port 416 and the first intake channel 82 respectively.

[0051] like Figure 1 and Figure 3 As shown, the first flange 80 also has a gas connection cavity 83, which is annular along the circumference of the crankshaft 40. The gas connection cavity 83 is connected to the first intake channel 82 and the second intake channel 421 respectively.

[0052] Specifically, gas outside the pump assembly reaches the gas connection chamber 83 through the first air intake channel 82 and then reaches the second compression chamber 22 through the second air intake channel 421 and the second suction port 416. This ensures that the second compression chamber 22 is always replenished with external gas, guaranteeing a sufficient supply of the gas to be compressed within it. The compressed gas in the second compression chamber 22 reaches the exhaust valve assembly 70 through the second exhaust port 417 and is discharged from the pump assembly through the air guide groove 81 connected to the exhaust valve assembly 70.

[0053] While the crankshaft 40 rotates to compress the gas in the second compression chamber 22, the roller 20 moves eccentrically in the cylinder 10 as the crankshaft 40 rotates, compressing the gas drawn in by the first intake port 13 and discharging it through the first exhaust port 14 to the pump assembly, thus achieving dual-cylinder compression.

[0054] like Figure 3 As shown, the central shaft 42 of the crankshaft 40 has a lubricating oil channel 422, which is connected to the friction pair of the oil sump and the pump body assembly, thereby providing lubrication and heat dissipation for the pump body assembly.

[0055] The present invention also provides a fluid machine including the pump assembly described above.

[0056] In this embodiment, the fluid machinery is a compressor.

[0057] Furthermore, the present invention also provides a heat exchange device, including the fluid machinery described above.

[0058] In this embodiment, the heat exchange device is an air conditioner.

[0059] like Figure 4 As shown, the heat exchange equipment also includes a condenser 110, a flash evaporator 120, an evaporator 130, a first throttling element 140, a second throttling element 150, a first on / off valve 160, and a second on / off valve 170. The evaporator 130 and condenser 110 are connected to the inlet and outlet of the fluid machinery 100, respectively. The first throttling element 140 is connected to the outlet of the condenser 110 and the inlet of the flash evaporator 120, respectively. The second throttling element 150 is connected to the liquid refrigerant outlet of the flash evaporator 120 and the inlet of the evaporator 130, respectively. The first on / off valve 160 is connected to the gas refrigerant outlet of the flash evaporator 120 and the gas supply inlet channel of the fluid machinery 100, respectively. The second on / off valve 170 is connected to the outlet of the evaporator 130 and the gas supply inlet channel of the fluid machinery 100, respectively.

[0060] Specifically, the fluid machinery 100 is also equipped with a distributor 190. Optionally, by opening the first on / off valve 160 and closing the second on / off valve 170, medium-pressure gaseous refrigerant separated by the flash evaporator 120 is introduced into the fluid machinery 100. The medium-pressure gaseous refrigerant mixes with the low-pressure gaseous refrigerant and is then compressed, increasing the enthalpy difference and greatly improving the efficiency of the fluid machinery. By closing the first on / off valve 160 and opening the second on / off valve 170, the outlet of the evaporator 130 is connected to the fluid machinery 100, allowing the fluid machinery 100 to be replenished with low-pressure gaseous refrigerant generated by the evaporator 130. Through the selective opening and closing of the on / off valves, multiple gaseous refrigerant replenishment methods are achieved for the fluid machinery 100, and different compression effects can be achieved by replenishing gas at different pressures.

[0061] Example 2

[0062] like Figure 5 As shown, the difference between Embodiment 2 and Embodiment 1 is that the heat exchange equipment further includes a third on / off valve 180, which is connected to the outlet of the fluid machinery 100 and the air supply channel of the fluid machinery 100, respectively.

[0063] When the first on / off valve 160 and the third on / off valve 180 are closed and the second on / off valve 170 is opened, the gas supply channel of the fluid machinery 100 introduces the low-pressure gas refrigerant from the outlet of the evaporator 130, and the low-pressure gas refrigerant can be fully compressed.

[0064] When the second on / off valve 170 and the third on / off valve 180 are closed and the first on / off valve 160 is opened, the gas supply channel of the fluid machinery 100 introduces the medium-pressure gas refrigerant separated by the flash evaporator 120, thereby increasing the enthalpy.

[0065] By closing the first on / off valve 160 and the second on / off valve 170 and opening the third on / off valve 180, the fluid machinery 100 introduces the high-pressure gas refrigerant generated by the pump body assembly. At this time, the high-pressure gas refrigerant cannot be compressed, so the second compression chamber 22 achieves the effect of being unloaded, that is, the second compression chamber 22 becomes an unloaded chamber.

[0066] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: By setting the pump body assembly to include a cylinder 10, a roller 20, a first sliding vane 30, a crankshaft 40, and a second sliding vane 50, the cylinder 10 has a first sliding vane 30. The roller 20 is disposed inside the cylinder 10 and forms a first compression chamber 12 with the inner wall of the cylinder 10. The first sliding vane 30 is slidably connected to the first sliding vane 30, and at least a portion of the first sliding vane 30 is accommodated within the first sliding vane 30. The top of the first sliding vane 30 is connected to the roller 20. The crankshaft 40 has an eccentric portion 41, and at least a portion of the outer periphery of the eccentric portion 41 is cut off so that the roller 20 and the outer periphery of the eccentric portion 41 form a second compression chamber 22. The roller 20 has a second sliding vane 50. The roller 20 is slidably connected to the second slide 50, and at least a portion of the first slide 30 is housed within the first slide 30. The top of the second slide 50 is connected to the eccentric portion 41. Thus, a second compression chamber 22 is formed on the outer periphery of the roller 20 and the eccentric portion 41. This allows for the addition of an independent second working chamber within the same cylinder without increasing the volume of the pump assembly itself, and without affecting the displacement of the first working chamber. This improves the volume utilization rate of the cylinder and the cylinder volume utilization rate of the pump assembly.

[0067] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0068] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0069] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0070] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0071] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0072] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0073] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0074] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pump body assembly, characterized in that, include: Cylinder (10), the cylinder (10) having a first sliding vane groove (11); Roller (20), the roller (20) is disposed in the cylinder (10) and forms a first compression chamber (12) with the inner wall of the cylinder (10); The first slide (30) is slidably connected to the first slide groove (11) and at least a portion of the first slide (30) is accommodated in the first slide groove (11), and the top of the first slide (30) is connected to the roller (20). A crankshaft (40) having an eccentric portion (41) at least a portion of the outer periphery of the eccentric portion (41) is cut off so that the roller (20) and the outer periphery of the eccentric portion (41) form a second compression cavity (22). The second slide (50) and the roller (20) have a second slide groove (21), the second slide (50) is slidably connected to the second slide groove (21) and at least a portion of the second slide (50) is accommodated in the second slide groove (21), and the top of the second slide (50) is connected to the eccentric portion (41).

2. The pump body assembly according to claim 1, characterized in that, The first sliding plate (30) is hinged to the roller (20); or The first sliding plate (30) and the roller (20) are integrally formed.

3. The pump body assembly according to claim 1, characterized in that, The pump body assembly also includes an elastic element (60) that is accommodated in the second vane groove (21) and abuts against the tail of the second vane (50).

4. The pump body assembly according to claim 1, characterized in that, The central angle α corresponding to the cut arc (411) of the eccentric part (41) satisfies: α≤180°.

5. The pump body assembly according to claim 4, characterized in that, The central angle α corresponding to the cut arc (411) of the eccentric part (41) satisfies: α≤120°.

6. The pump body assembly according to claim 1, characterized in that, The angle θ between the line connecting the rotation center of the crankshaft (40) and the point on the eccentric circle of the eccentric part (41) closest to the rotation center of the crankshaft (40), and the line connecting the rotation center of the crankshaft (40) and the midpoint of the cut arc (411) of the eccentric part (41), satisfies: θ≥180°.

7. The pump body assembly according to claim 6, characterized in that, The angle θ between the line connecting the rotation center of the crankshaft (40) and the point on the eccentric circle of the eccentric part (41) closest to the rotation center of the crankshaft (40), and the line connecting the rotation center of the crankshaft (40) and the midpoint of the cut arc (411) of the eccentric part (41), satisfies: 210°≤θ≤300°.

8. The pump body assembly according to claim 1, characterized in that, The eccentric circle of the eccentric part (41) includes a retracted section (412), an extended buffer section (413), an extended section (414), and a retracted buffer section (415), wherein the phase angle between the extended buffer section (413) and the retracted buffer section (415) is less than or equal to 30°.

9. The pump body assembly according to claim 1, characterized in that, The eccentric portion (41) has a second exhaust port (417) communicating with the second compression chamber (22), and the pump body assembly further includes an exhaust valve assembly (70), which is disposed on the eccentric portion (41) and communicates with the second exhaust port (417).

10. The pump body assembly according to claim 9, characterized in that, The pump body assembly also includes a first flange (80) and a second flange, the cylinder (10) is located between the first flange (80) and the second flange, the eccentric part (41) also has a second air intake port (416) communicating with the second compression chamber (22), the first flange (80) has an air guide groove (81) and a first air intake channel (82), the exhaust valve assembly (70) is communicating with the air guide groove (81), and the second air intake port (416) is communicating with the first air intake channel (82).

11. The pump body assembly according to claim 10, characterized in that, The air guide groove (81) is a waist-shaped groove that extends circumferentially along the eccentric portion (41).

12. The pump body assembly according to claim 10, characterized in that, The crankshaft (40) has a central shaft (42) with a second intake channel (421) which is connected to the second intake port (416) and the first intake channel (82) respectively.

13. The pump body assembly according to claim 12, characterized in that, The first flange (80) also has a gas connection cavity (83), which is annular along the circumference of the crankshaft (40) and is connected to the first intake channel (82) and the second intake channel (421) respectively.

14. The pump body assembly according to claim 1, characterized in that, The crankshaft (40) has a central shaft (42) with a lubricating oil passage (422) that is connected to the friction pair of the oil sump and the pump body assembly.

15. A fluid machine, characterized in that, Includes the pump body assembly as described in any one of claims 1 to 14.

16. A heat exchange device, characterized in that, Including the fluid machinery as described in claim 15.

17. The heat exchange device according to claim 16, characterized in that, The heat exchange equipment further includes a condenser (110), a flash evaporator (120), an evaporator (130), a first throttling element (140), a second throttling element (150), a first on / off valve (160), and a second on / off valve (170). The evaporator (130) and the condenser (110) are respectively connected to the inlet and outlet of the fluid machinery. The first throttling element (140) is respectively connected to the outlet of the condenser (110) and the inlet of the flash evaporator (120). The second throttling element (150) is respectively connected to the liquid refrigerant outlet of the flash evaporator (120) and the inlet of the evaporator (130). The first on / off valve (160) is respectively connected to the gas refrigerant outlet of the flash evaporator (120) and the gas supply inlet channel of the fluid machinery. The second on / off valve (170) is respectively connected to the outlet of the evaporator (130) and the gas supply inlet channel of the fluid machinery.

18. The heat exchange device according to claim 16, characterized in that, The heat exchange equipment also includes a third on / off valve (180), which is connected to the outlet of the fluid machinery and the air supply channel of the fluid machinery, respectively.

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