CN117419048A

CN117419048A - Pump body assembly, fluid machinery and heat exchange equipment

Info

Publication number: CN117419048A
Application number: CN202311512113.5A
Authority: CN
Inventors: 苏永强; 任丽萍; 扶峥; 颜伟豪; 姜秋来
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2023-11-13
Filing date: 2023-11-13
Publication date: 2024-01-19

Abstract

The invention provides a pump body assembly, a fluid machine and heat exchange equipment. The pump body assembly includes: the cylinder is provided with a first sliding vane groove; the roller is arranged in the cylinder and forms a first compression cavity with the inner wall of the cylinder; the first sliding piece is in sliding connection with the first sliding piece groove, at least one part of the first sliding piece is accommodated in the first sliding piece groove, and the top of the first sliding piece is connected with the roller; a crankshaft having an eccentric portion, at least a portion of an outer periphery of the eccentric portion being cut away so that the roller and the outer periphery of the eccentric portion form a second compression chamber; the roller is provided with a second sliding blade groove, the second sliding blade is in sliding connection with the second sliding blade groove, at least one part of the second sliding blade is accommodated in the second sliding blade groove, and the top of the second sliding blade is connected with the eccentric part. The invention solves the problem of lower cylinder volume utilization rate of the pump body assembly in the prior art.

Description

Pump body assembly, fluid machinery and heat exchange equipment

Technical Field

The invention relates to the technical field of heat exchange equipment, in particular to a pump body assembly, fluid machinery and heat exchange equipment.

Background

In the prior art, heat exchange devices have been very popular, and the heat exchange of the existing heat exchange devices is realized by a pump body assembly in a fluid machine. Common heat exchange devices and fluid machines are air conditioners and compressors. The existing rotary single-cylinder compressor operates under a low-temperature working condition, and the heating capacity is seriously attenuated, so that a two-stage compression and air injection enthalpy-increasing technology appears in the market to meet the heating requirement of a user in winter or a low-temperature environment, the heating capacity of an air conditioner circulating system at a low temperature can be improved, the structural complexity is increased, and the cost of the compressor is greatly increased.

The realization method of the existing rotary compressor with a single-cylinder multi-cavity structure is that a crescent volume cavity of a cylinder is divided into a plurality of independent compression cavities by a plurality of sliding sheets. The method causes the added sliding vane to occupy the crescent volume cavity, so that the volume utilization rate of the cylinder is reduced, and the volume of the cylinder needs to be made larger under the same displacement.

From the above, the problem of low cylinder volume utilization rate of the pump body assembly exists in the prior art.

Disclosure of Invention

The invention mainly aims to provide a pump body assembly, a fluid machine and heat exchange equipment, so as to solve the problem of low cylinder volume utilization rate of the pump body assembly in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a pump body assembly comprising: the cylinder is provided with a first sliding vane groove; the roller is arranged in the cylinder and forms a first compression cavity with the inner wall of the cylinder; the first sliding piece is in sliding connection with the first sliding piece groove, at least one part of the first sliding piece is accommodated in the first sliding piece groove, and the top of the first sliding piece is connected with the roller; a crankshaft having an eccentric portion, at least a portion of an outer periphery of the eccentric portion being cut away so that the roller and the outer periphery of the eccentric portion form a second compression chamber; the roller is provided with a second sliding blade groove, the second sliding blade is in sliding connection with the second sliding blade groove, at least one part of the second sliding blade is accommodated in the second sliding blade groove, and the top of the second sliding blade is connected with the eccentric part.

Further, the first sliding sheet is hinged with the roller; or the first slide sheet and the roller are integrally formed.

Further, the pump body assembly further comprises an elastic piece, wherein the elastic piece is accommodated in the second sliding piece groove and is abutted with the tail part of the second sliding piece.

Further, the central angle α corresponding to the cutting arc of the eccentric portion satisfies: alpha is less than or equal to 180 degrees.

Further, the central angle α corresponding to the cutting arc of the eccentric portion satisfies: alpha is less than or equal to 120 degrees.

Further, the included angle θ between the line connecting the rotation center of the crankshaft and the point where the eccentric circle of the eccentric portion is closest to the rotation center of the crankshaft, and the line connecting the rotation center of the crankshaft and the midpoint of the cutting arc of the eccentric portion satisfies: θ is greater than or equal to 180 °.

Further, the included angle θ between the line connecting the rotation center of the crankshaft and the point where the eccentric circle of the eccentric portion is closest to the rotation center of the crankshaft, and the line connecting the rotation center of the crankshaft and the midpoint of the cutting arc of the eccentric portion satisfies: θ is more than or equal to 210 degrees and less than or equal to 300 degrees.

Further, the eccentric circle of the eccentric portion includes a retracting section, an extending buffer section, an extending section and a retracting buffer section, wherein an extending length when the second sliding sheet contacts the extending section is h, then the extending length when the second sliding sheet contacts the extending buffer section and the retracting buffer section is 0.2h, and a phase angle of the extending buffer section and the retracting buffer section is less than or equal to 30 °.

Further, the eccentric portion has a second exhaust port in communication with the second compression chamber, and the pump body assembly further includes an exhaust valve assembly disposed on the eccentric portion and in communication with the second exhaust port.

Further, the pump body assembly further comprises a first flange and a second flange, the cylinder is located between the first flange and the second flange, the eccentric portion further comprises a second air suction port communicated with the second compression cavity, the first flange is provided with an air guide groove and a first air inlet channel, the exhaust valve assembly is communicated with the air guide groove, and the second air suction port is communicated with the first air inlet channel.

Further, the air guide groove is a kidney-shaped groove extending along the circumferential direction of the eccentric portion.

Further, the central shaft of the crankshaft is provided with a second air inlet channel which is respectively communicated with the second air suction port and the first air inlet channel.

Further, the first flange is further provided with a gas connecting cavity, the gas connecting cavity is annular and is arranged along the circumferential direction of the crankshaft, and the gas connecting cavity is respectively communicated with the first air inlet channel and the second air inlet channel.

Further, the central shaft of the crankshaft has a lubrication oil passage in communication with the sump and the friction pair of the pump body assembly.

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

According to another aspect of the present invention, there is provided a heat exchange device comprising a fluid machine as described above.

Further, the heat exchange device further comprises a condenser, a flash evaporator, an evaporator, a first throttling element, a second throttling element, a first opening and closing valve and a second opening and closing valve, wherein the evaporator and the condenser are respectively connected with an inlet and an outlet of the fluid machine, the first throttling element is respectively connected with an outlet of the condenser and an inlet of the flash evaporator, the second throttling element is respectively connected with a liquid refrigerant outlet of the flash evaporator and an inlet of the evaporator, the first opening and closing valve is respectively connected with a gas refrigerant outlet of the flash evaporator and an air supplementing and air inlet channel of the fluid machine, and the second opening and closing valve is respectively connected with an outlet of the evaporator and an air supplementing and air inlet channel of the fluid machine.

Further, the heat exchange apparatus further includes a third opening/closing valve connected to the outlet of the fluid machine and the air-supply intake passage of the fluid machine, respectively.

By applying the technical scheme of the invention, the pump body component comprises the air cylinder, the roller, the first sliding vane, the crankshaft and the second sliding vane, the air cylinder is provided with the first sliding vane groove, the roller is arranged in the air cylinder and forms a first compression cavity with the inner wall of the air cylinder, the first sliding vane is in sliding connection with the first sliding vane groove, at least one part of the first sliding vane is accommodated in the first sliding vane groove, the top of the first sliding vane is connected with the roller, the crankshaft is provided with the eccentric part, at least one part of the outer periphery of the eccentric part is cut off, so that the roller and the outer periphery of the eccentric part form a second compression cavity, the roller is provided with the second sliding vane groove, the top of the second sliding vane is connected with the eccentric part, and thus, on the premise of not increasing the volume of the pump body component per se, an independent second working cavity is realized in the same air cylinder, the displacement of the first working cavity is not influenced, the volume utilization rate of the air cylinder is improved, and the lower volume utilization rate of the pump body component in the prior art is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 shows a schematic diagram of a pump body assembly in accordance with a first embodiment of the present invention;

fig. 2 shows a schematic structural view at an eccentric portion in a first embodiment of the present invention;

FIG. 3 shows a schematic view of the structure of a first flange according to a first embodiment of the present invention;

fig. 4 shows a schematic structural view of a heat exchange apparatus according to a first embodiment of the present invention;

fig. 5 shows a schematic structural diagram of a heat exchange apparatus in a second embodiment of the present invention.

Wherein the above figures include the following reference numerals:

10. a cylinder; 11. a first slider groove; 12. a first compression chamber; 13. a first air suction port; 14. a first exhaust port; 20. a roller; 21. a second slide groove; 22. a second compression chamber; 30. a first slide; 40. a crankshaft; 41. a eccentric portion; 411. cutting off an arc line; 412. a retraction section; 413. extending the buffer section; 414. an extension section; 415. retracting the buffer section; 416. a second air suction port; 417. a second exhaust port; 42. a central shaft; 421. a second intake passage; 422. a lubrication oil passage; 50. a second slide; 60. an elastic member; 70. an exhaust valve assembly; 80. a first flange; 81. an air guide groove; 82. a first air intake passage; 83. a gas connection chamber; 100. a fluid machine; 110. a condenser; 120. a flash evaporator; 130. an evaporator; 140. a first throttle member; 150. a second throttle member; 160. a first opening/closing valve; 170. a second opening/closing valve; 180. a third opening/closing valve; 190. a liquid separator.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention provides a pump body assembly, fluid machinery and heat exchange equipment, and aims to solve the problem that the cylinder volume utilization rate of the pump body assembly is low in the prior art.

Example 1

As shown in fig. 1, the pump body assembly includes a cylinder 10, a roller 20, a first slide 30, a crankshaft 40, and a second slide 50. The cylinder 10 has a first vane slot 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 sliding vane 30 is slidably connected with the first sliding vane groove 11, at least a part of the first sliding vane 30 is accommodated in the first sliding vane groove 11, and the top of the first sliding vane 30 is connected with the roller 20. Crankshaft 40 has eccentric portion 41, and at least a portion of the outer peripheral edge of eccentric portion 41 is cut away so that roller 20 and the outer peripheral edge of eccentric portion 41 form second compression chamber 22. The roller 20 has a second slide 50, the second slide 50 is slidably connected to the second slide groove 21, 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.

Through setting up the pump body subassembly and including cylinder 10, roller 20, first gleitbretter 30, bent axle 40, second gleitbretter 50, cylinder 10 has first gleitbretter groove 11, roller 20 sets up in cylinder 10 and forms first compression chamber 12 with the inner wall of cylinder 10, first gleitbretter 30 and first gleitbretter groove 11 sliding connection and the at least partial accommodation of first gleitbretter 30 is in first gleitbretter groove 11, the top and the roller 20 of first gleitbretter 30 are connected, bent axle 40 has eccentric part 41, at least a portion of eccentric part 41's outer periphery is cut, so that roller 20 and eccentric part 41's outer periphery form second compression chamber 22, roller 20 has second gleitbretter 50, second gleitbretter groove 21 sliding connection and at least a portion accommodation of second gleitbretter 50 are in second gleitbretter groove 21, the top and eccentric part 41 are connected, can realize an independent second working chamber in same cylinder under the prerequisite that does not increase pump body subassembly own volume, and the volume utilization ratio of the pump body subassembly that can not influence the volume of the pump body, thereby the volume utilization ratio of the pump body subassembly has been improved.

In this embodiment, the first slide 30 is hinged to the roller 20. Of course, to ensure the connection between the roller 20 and the first slider 30, the first slider 30 and the roller 20 may be integrally formed.

As shown in fig. 1, the pump body assembly further includes an elastic member 60, where the elastic member 60 is accommodated in the second sliding vane groove 21 and abuts against the tail of the second sliding vane 50.

In this embodiment, the elastic member 60 is a spring. The second slider 50 is moved along the second slider groove 21 by the elastic force of the spring to provide a power source.

As shown in fig. 2, in the present embodiment, the central angle α corresponding to the cutting arc 411 of the eccentric portion 41 satisfies: alpha is less than or equal to 180 degrees. It will be appreciated that the cutting arc 411 is an arc of the outer periphery of the eccentric portion 41 after a portion is cut.

Further, in a preferred embodiment, the central angle α corresponding to the cutting arc 411 of the eccentric portion 41 satisfies: alpha is less than or equal to 120 degrees.

With the central angle α set in the above range, crankshaft 40 and roller 20 can have a sufficient mating angle, which is advantageous in forming an oil film therebetween to reduce friction. If the angle of the central angle α is greater than 180 °, the inner circle of the roller 20 and the outer circle of the eccentric portion 41 cannot be guaranteed to be attached, which easily results in a shaking allowance of the roller 20 on the crankshaft 40, thereby reducing the compression efficiency and the service life of the pump body assembly.

In the present embodiment, the angle θ between the line between the rotation center of crankshaft 40 and the point where the eccentric circle of eccentric portion 41 is closest to the rotation center of crankshaft 40, the line between the rotation center of crankshaft 40 and the midpoint of the cutting arc 411 of eccentric portion 41 satisfies: θ is greater than or equal to 180 °. Specifically, the closest point to eccentric portion 41 of the center of rotation of crankshaft 40 is set to be the 0 ° point, the farthest point is the 180 ° point, and angle θ is the angle between the midpoint of the cut-out arc 411 closest to the center of rotation of crankshaft 40 and the 0 ° point, as the angle θ in fig. 2 is 180 °. Because of the friction pair between the eccentric portion 41 and the roller 20 during the compression of the fluid machine, the pressure generated by the operation of the first compression chamber 12 is mainly applied to the eccentric portion 41 at an angle of between 0 ° and 150 °. To ensure a bearing surface area of crankshaft 40, included angle θ is at least greater than 180 degrees. The cut-out span ensures an angle that allows the force bearing angle of crankshaft 40 to be sufficiently long.

Further, in a preferred embodiment, the angle θ between the line between the center of rotation of crankshaft 40 and the point where the eccentric circle of eccentric portion 41 is closest to the center of rotation of crankshaft 40, the line between the center of rotation of crankshaft 40 and the midpoint of the cutting arc 411 of eccentric portion 41 satisfies: θ is more than or equal to 210 degrees and less than or equal to 300 degrees.

As shown in fig. 2, the eccentric circle of the eccentric portion 41 includes a retracting section 412, an extending buffer section 413, an extending section 414, and a retracting buffer section 415. Wherein, when the second sliding vane 50 contacts the extension section 414, the extension length is h, and when the second sliding vane 50 contacts the extension buffer section 413 and the retraction buffer section 415, the extension length is 0.2h, and the phase angle of the extension buffer section 413 and the retraction buffer section 415 is less than or equal to 30 °. The molded line formed by the arrangement can slow down the vibration and noise generated by the impact generated by the overlarge extending speed of the second sliding vane 50, thereby avoiding the second sliding vane 50 from causing larger impact on the cylinder 10 and prolonging the service life of the cylinder.

As shown in fig. 1, the eccentric portion 41 has a second discharge port 417 communicating with the second compression chamber 22. The pump body assembly further includes a vent valve assembly 70, the vent valve assembly 70 being disposed on the eccentric portion 41 and in communication with the second vent 417. Specifically, the discharge valve assembly 70 includes a discharge groove, a discharge valve plate, and a discharge baffle plate as check valves of the second compression chamber 22, preventing the 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 in the second compression chamber 22.

As shown in fig. 3, the pump body assembly further 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 suction port 416 communicating with the second compression chamber 22. The first flange 80 has an air guide groove 81 and a first air intake passage 82, the air discharge valve assembly 70 communicates with the air guide groove 81, and the second air suction port 416 communicates with the first air intake passage 82.

In the present embodiment, the air guide groove 81 is a kidney-shaped groove extending in the circumferential direction of the eccentric portion 41.

As shown in fig. 1 and 3, the center shaft 42 of the crankshaft 40 has a second intake passage 421, and the second intake passage 421 communicates with the second intake port 416 and the first intake passage 82, respectively.

As shown in fig. 1 and 3, the first flange 80 further has a gas connection chamber 83, the gas connection chamber 83 being annular provided in the circumferential direction of the crankshaft 40, the gas connection chamber 83 being in communication with the first intake passage 82 and the second intake passage 421, respectively.

Specifically, the air outside the pump body assembly reaches the air connecting cavity 83 through the first air inlet channel 82 and reaches the second compression cavity 22 through the second air inlet channel 421 and the second air suction port 416, so that the second compression cavity 22 can be always supplemented with external air, and the sufficiency of air to be compressed in the second compression cavity 22 is ensured. The gas compressed in the second compression chamber 22 reaches the discharge valve assembly 70 through the second discharge port 417 and is discharged out of the pump body assembly through the gas guide groove 81 communicating with the discharge valve assembly 70.

While the crankshaft 40 rotates to compress the gas in the second compression chamber 22, the roller 20 moves eccentrically in the cylinder 10 along with the rotation of the crankshaft 40, compresses the gas sucked through the first suction port 13, and then discharges the compressed gas out of the pump body assembly through the first exhaust port 14, thereby realizing double-cylinder compression.

As shown in fig. 3, the central shaft 42 of the crankshaft 40 has a lubrication oil passage 422, and the lubrication oil passage 422 communicates with the oil sump and the friction pair of the pump body assembly, thereby lubricating and dissipating heat for the pump body assembly.

The invention also provides a fluid machine comprising the pump body assembly.

In this embodiment, the fluid machine is a compressor.

Furthermore, the invention also provides heat exchange equipment comprising the fluid machinery.

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

As shown in fig. 4, the heat exchange apparatus further includes a condenser 110, a flash evaporator 120, an evaporator 130, a first throttle 140, a second throttle 150, a first on-off valve 160, and a second on-off valve 170. The evaporator 130 and the condenser 110 are connected to an inlet and an outlet of the fluid machine 100, respectively, the first throttle member 140 is connected to an outlet of the condenser 110 and an inlet of the flash evaporator 120, respectively, the second throttle member 150 is connected to a liquid refrigerant outlet of the flash evaporator 120 and an inlet of the evaporator 130, respectively, the first opening/closing valve 160 is connected to a gas refrigerant outlet of the flash evaporator 120 and a gas supply/intake passage of the fluid machine 100, respectively, and the second opening/closing valve 170 is connected to an outlet of the evaporator 130 and a gas supply/intake passage of the fluid machine 100, respectively.

Specifically, the fluid machine 100 is further provided with a dispenser 190. Optionally, the first on-off valve 160 is opened, the second on-off valve 170 is closed, the medium-pressure gas refrigerant separated by the flash evaporator 120 is fed into the fluid machine 100, and the medium-pressure gas refrigerant and the low-pressure gas refrigerant are compressed after being mixed, so that the enthalpy difference value is increased, and the efficiency of the fluid machine is greatly improved. The first on-off valve 160 is closed and the second on-off valve 170 is opened, at this time, the outlet of the evaporator 130 is communicated with the fluid machine 100, the fluid machine 100 can supplement the low-pressure gas refrigerant generated by the evaporator 130, the multiple gas refrigerant supplement modes of the fluid machine 100 are realized through the selective opening and closing of the on-off valve, and different compression effects can be realized by supplementing the gas with different pressures.

Example two

As shown in fig. 5, the second embodiment is different from the first embodiment in that the heat exchange apparatus further includes a third opening/closing valve 180, and the third opening/closing valve 180 is connected to the outlet of the fluid machine 100 and the air supply and air intake passage of the fluid machine 100, respectively.

When the first and third on-off valves 160 and 180 are closed and the second on-off valve 170 is opened, the low-pressure gas refrigerant at the outlet of the evaporator 130 is introduced into the air-supplementing intake passage of the fluid machine 100, and the low-pressure gas refrigerant can be fully compressed.

When the second and third on-off valves 170 and 180 are closed and the first on-off valve 160 is opened, the medium-pressure gas refrigerant separated by the flash evaporator 120 is introduced into the air-supply intake passage of the fluid machine 100, thereby achieving the function of enthalpy increase.

By closing the first on-off valve 160, the second on-off valve 170, and opening the third on-off valve 180, the fluid machine 100 introduces the high-pressure gas refrigerant generated by the pump body assembly, and the high-pressure gas refrigerant at this time cannot be compressed, so that the second compression chamber 22 is empty, that is, the second compression chamber 22 becomes an empty chamber.

From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: by providing a pump body assembly comprising a cylinder 10, a roller 20, a first slide 30, a crankshaft 40, a second slide 50, the cylinder 10 has a first slide 30. The roller 20 is arranged in the cylinder 10 and forms a first compression cavity 12 with the inner wall of the cylinder 10, the first sliding vane 30 is in sliding connection with the first sliding vane 30, at least one part of the first sliding vane 30 is accommodated in the first sliding vane 30, the top of the first sliding vane 30 is connected with the roller 20, the crankshaft 40 is provided with an eccentric part 41, at least one part of the outer periphery of the eccentric part 41 is cut off, so that the roller 20 and the outer periphery of the eccentric part 41 form a second compression cavity 22, the roller 20 is provided with a second sliding vane 50, the second sliding vane 50 is in sliding connection with the second sliding vane 50, at least one part of the first sliding vane 30 is accommodated in the first sliding vane 30, and the top of the second sliding vane 50 is connected with the eccentric part 41.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pump body assembly, comprising:

a cylinder (10), the cylinder (10) having a first slide groove (11);

a roller (20), the roller (20) being arranged within the cylinder (10) and forming a first compression chamber (12) with the inner wall of the cylinder (10);

the first sliding blade (30), the first sliding blade (30) is in sliding connection with the first sliding blade groove (11), at least one part of the first sliding blade (30) is accommodated in the first sliding blade groove (11), and the top of the first sliding blade (30) is connected with the roller (20);

-a crankshaft (40), the crankshaft (40) having an eccentric portion (41), at least a portion of the outer periphery of the eccentric portion (41) being cut away so that the roller (20) and the outer periphery of the eccentric portion (41) form a second compression chamber (22);

the second sliding blade (50), the roller (20) has second gleitbretter groove (21), second gleitbretter (50) with second gleitbretter groove (21) sliding connection just at least a portion of second gleitbretter (50) are held in second gleitbretter groove (21), the top of second gleitbretter (50) with eccentric part (41) are connected.

2. The pump body assembly of claim 1, wherein,

the first sliding sheet (30) is hinged with the roller (20); or alternatively

The first sliding sheet (30) and the roller (20) are integrally formed.

3. Pump body assembly according to claim 1, characterized in that it further comprises an elastic element (60), said elastic element (60) being housed in said second slide groove (21) and abutting against the tail of said second slide (50).

4. Pump body assembly according to claim 1, characterized in that the central angle α corresponding to the cutting arc (411) of the eccentric portion (41) satisfies: alpha is less than or equal to 180 degrees.

5. Pump body assembly according to claim 4, characterized in that the central angle α corresponding to the cutting arc (411) of the eccentric (41) satisfies: alpha is less than or equal to 120 degrees.

6. Pump body assembly according to claim 1, characterized in that the angle θ of the line between the centre of rotation of the crankshaft (40) and the point of the eccentric circle of the eccentric (41) closest to the centre of rotation of the crankshaft (40), the line between the centre of rotation of the crankshaft (40) and the midpoint of the cutting-out arc (411) of the eccentric (41) is such that: θ is greater than or equal to 180 °.

7. Pump body assembly according to claim 6, characterized in that the angle θ between the line of rotation of the crankshaft (40) and the point of closest distance of the eccentric circle of the eccentric (41) from the rotation of the crankshaft (40), the line of rotation of the crankshaft (40) and the midpoint of the cutting-out arc (411) of the eccentric (41) is such that: θ is more than or equal to 210 degrees and less than or equal to 300 degrees.

8. Pump body assembly according to claim 1, wherein the eccentric circle of the eccentric portion (41) comprises a retraction section (412), an extension buffer section (413), an extension section (414) and a retraction buffer section (415), wherein the extension length when the second slide (50) is in contact with the extension section (414) is h, the extension length when the second slide (50) is in contact with the extension buffer section (413) and the retraction buffer section (415) is 0.2h, and the phase angle of the extension buffer section (413) and the retraction buffer section (415) is 30 ° or less.

9. Pump body assembly according to claim 1, wherein the eccentric portion (41) has a second exhaust port (417) communicating with the second compression chamber (22), the pump body assembly further comprising an exhaust valve assembly (70), the exhaust valve assembly (70) being arranged on the eccentric portion (41) and communicating with the second exhaust port (417).

10. The pump body assembly of claim 9, further comprising a first flange (80) and a second flange, wherein the cylinder (10) is located between the first flange (80) and the second flange, wherein the eccentric portion (41) further has a second suction port (416) in communication with the second compression chamber (22), wherein the first flange (80) has a gas guide groove (81) and a first intake passage (82), wherein the vent valve assembly (70) is in communication with the gas guide groove (81), and wherein the second suction port (416) is in communication with the first intake passage (82).

11. Pump body assembly according to claim 10, characterized in that the air guide groove (81) is a kidney-shaped groove extending in the circumferential direction of the eccentric portion (41).

12. Pump body assembly according to claim 10, characterized in that the central shaft (42) of the crankshaft (40) has a second intake channel (421), the second intake channel (421) being in communication with the second suction opening (416) and the first intake channel (82), respectively.

13. Pump body assembly according to claim 12, wherein the first flange (80) further has a gas connection chamber (83), the gas connection chamber (83) being annular arranged along the circumference of the crankshaft (40), the gas connection chamber (83) being in communication with the first intake channel (82) and the second intake channel (421), respectively.

14. Pump body assembly according to claim 1, characterized in that the central shaft (42) of the crankshaft (40) has a lubrication oil channel (422), the lubrication oil channel (422) being in communication with an oil sump and a friction pair of the pump body assembly.

15. A fluid machine comprising a pump body assembly according to any one of claims 1 to 14.

16. A heat exchange device comprising the fluid machine of claim 15.

17. The heat exchange device according to claim 16, further comprising a condenser (110), a flash evaporator (120), an evaporator (130), a first throttle (140), a second throttle (150), a first on-off valve (160) and a second on-off valve (170), the evaporator (130) and the condenser (110) being connected with the inlet and the outlet of the fluid machine, respectively, the first throttle (140) being connected with the outlet of the condenser (110) and the inlet of the flash evaporator (120), respectively, the second throttle (150) being connected with the liquid refrigerant outlet of the flash evaporator (120) and the inlet of the evaporator (130), respectively, the first on-off valve (160) being connected with the gas refrigerant outlet of the flash evaporator (120) and the gas-make-up intake passage of the fluid machine, respectively, the second on-off valve (170) being connected with the outlet of the evaporator (130) and the gas-make-up intake passage of the fluid machine, respectively.

18. The heat exchange apparatus according to claim 16, further comprising a third opening/closing valve (180), said third opening/closing valve (180) being connected to an outlet of said fluid machine and a make-up air intake passage of said fluid machine, respectively.