Rotary compressor pump body, compressor and air conditioner

Abstract

The present invention provides a rotor compressor pump body, a compressor and an air conditioner. The rotor compressor pump body includes: a first cylinder and a second cylinder. The first cylinder has a first air intake, a first air outlet and a second air outlet. The second cylinder has a second air intake and a third air outlet. The first cylinder can inhale gas from the first air intake and compress it in the first cylinder. The first air outlet and the second air outlet are arranged at different positions on the first cylinder. The first air outlet can be connected with the second air intake of the second cylinder, so that the gas discharged from the first air outlet enters the second cylinder through the second air intake and is compressed, forming a two-stage compression. The compressed gas in the first cylinder can also be directly discharged through the second air outlet and mixed with the gas compressed in the second cylinder and discharged through the third air outlet. According to the present invention, the problem of too high exhaust temperature of the compressor and the problem of low energy efficiency can be solved at the same time, and the energy efficiency of the compressor can be improved while reducing the exhaust temperature.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to a rotor type compressor pump body, a compressor and an air conditioner. Background Art

[0002] Common rotary compressors can be divided into single-stage compressors and two-stage compressors according to different compression methods. When single-stage compressors are used in harsh working conditions, there is a problem of excessive exhaust temperature affecting reliability; two-stage compressors can improve this situation, so they are widely used in harsh working conditions. However, when two-stage compressors are used in normal working conditions, there is a problem of over-compression resulting in low energy efficiency.

[0003] Since the compressors in the prior art cannot solve the technical problems of excessively high exhaust temperature and low energy efficiency at the same time, the present invention studies and designs a rotor compressor pump body, a compressor and an air conditioner. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the compressor in the prior art that the exhaust temperature is too high and the energy efficiency is low, thereby providing a rotor compressor pump body, a compressor and an air conditioner.

[0005] In order to solve the above problems, the present invention provides a rotor compressor pump body, which includes:

[0006] A first cylinder and a second cylinder, the first cylinder having a first intake port, a first outlet port, and a second outlet port, the second cylinder having a second intake port and a third outlet port, the first cylinder can inhale gas from the first intake port and compress it in the first cylinder, the first outlet port and the second outlet port are arranged at different positions on the first cylinder, the first outlet port can be connected with the second intake port of the second cylinder, so that the gas discharged from the first outlet port enters the second cylinder through the second intake port for compression, forming a two-stage compression, the compressed gas in the first cylinder can also be directly discharged through the second outlet port and mixed with the gas compressed in the second cylinder and discharged through the third outlet port.

[0007] In some embodiments,

[0008] The gas pressure at the first gas outlet is lower than the gas pressure at the second gas outlet; and / or, the first gas outlet is a groove structure opened on the end face of one axial side of the first cylinder, and the second gas outlet is a groove structure opened on the end face of the other axial side of the first cylinder.

[0009] In some embodiments,

[0010] It also includes a first slide and a roller, a first slide groove is provided on the first cylinder, the first slide is at least partially inserted in the first slide groove, and the roller is provided in the hollow inner cavity of the first cylinder, the first slide and the roller can divide the hollow inner cavity of the first cylinder into an intake chamber and a compression chamber, the first intake port is connected with the intake chamber, the first air outlet and the second air outlet are both connected with the compression chamber, and the second air outlet is arranged at a position close to the first slide groove relative to the first air outlet; with the movement of the roller, part of the gas in the compression chamber is first discharged from the first air outlet, and part or all of the remaining gas is further compressed in the compression chamber and discharged from the second air outlet.

[0011] In some embodiments,

[0012] In the axial projection plane, the center line of the first vane groove passes through the center of the first cylinder and forms a first dividing line, the first air intake port is arranged on the first cylinder and is located on one side of the first dividing line, the first air outlet and the second air outlet are both arranged on the first cylinder and are located on the other side of the first dividing line, the second dividing line passes through the center of the first cylinder and is perpendicular to the first dividing line, and the first air outlet is located on the side of the second dividing line away from the first vane groove, and the second air outlet is located on the side of the second dividing line close to the first vane groove.

[0013] In some embodiments,

[0014] In the axial projection plane, both the first air outlet and the second air outlet are in the form of crescent grooves.

[0015] In some embodiments,

[0016] It also includes a first flange, which is arranged on an axial side of the first cylinder away from the second cylinder, so that the first air outlet is arranged toward a side of the second cylinder, and the second air outlet is arranged toward a side of the first flange;

[0017] A first exhaust port is axially arranged on the first flange, and the first exhaust port is axially arranged opposite to and connected to the second exhaust port of the first cylinder, so that the gas discharged from the first cylinder through the second exhaust port can be discharged through the first exhaust port of the first flange.

[0018] In some embodiments,

[0019] It also includes a partition, which is arranged between the first cylinder and the second cylinder in the axial direction, and the partition has a second exhaust port and an intermediate cavity, the first exhaust port is connected with the intermediate cavity through the second exhaust port, and the intermediate cavity is also connected with the second intake port of the second cylinder; the first cylinder is also provided with an air supply channel, which can be connected with external air supply, and the air supply channel is connected with the intermediate cavity so as to supply air to the second cylinder; the first cylinder is also provided with an air supply channel, and the partition is also provided with an air supply port, which is connected between the air supply channel and the intermediate cavity so as to supply air to the second cylinder.

[0020] In some embodiments,

[0021] It also includes a second flange and a muffler, the second flange is arranged on the axial end face of the second cylinder away from the partition, the second flange is provided with a third exhaust port, the third exhaust port is opposite to and connected with the third exhaust port of the second cylinder, the muffler cover is arranged on the axial side of the second flange away from the second cylinder, and an exhaust chamber is formed between the muffler and the second flange, and the exhaust chamber is connected with the third exhaust port.

[0022] In some embodiments,

[0023] A first flow hole is arranged on the first flange axially through both axial ends, a second flow hole is arranged on the first cylinder axially through both axial ends, a third flow hole is arranged on the partition plate axially through both axial ends, a fourth flow hole is arranged on the second cylinder axially through both axial ends, and a fifth flow hole is arranged on the second flange axially through both axial ends. The first flow hole, the second flow hole, the third flow hole, the fourth flow hole and the fifth flow hole are all axially opposite to each other and connected in sequence. The fifth flow hole is connected to the exhaust chamber, so that the gas compressed by the second cylinder passes through the exhaust chamber, the fifth flow hole, the fourth flow hole, the third flow hole, the second flow hole and the first flow hole in sequence and is discharged.

[0024] In some embodiments,

[0025] It also includes a shell, the first cylinder and the second cylinder are both arranged inside the shell, the gas compressed in the first cylinder is discharged into the shell through the second outlet, and the gas compressed in the second cylinder is discharged into the shell through the third outlet, and the gas compressed by the first cylinder and the gas compressed by the second cylinder are mixed in the shell.

[0026] The present invention also provides a compressor, which comprises the above-mentioned rotor compressor pump body.

[0027] The present invention also provides an air conditioner, which comprises the aforementioned compressor.

[0028] The present invention provides a rotor compressor pump body, a compressor and an air conditioner, which have the following beneficial effects:

[0029] The present invention is provided with more than two cylinders, and in particular, two air outlets are provided on the first cylinder, so that the gas discharged from the first air outlet in the first cylinder can enter the second cylinder for compression, thereby forming a two-stage compression. At the same time, through the second air outlet opened on the first cylinder, part of the gas can form a single-stage compression in the first cylinder and be discharged from the second air outlet, so that the pump body can simultaneously operate both single-stage compression and two-stage compression. Among them, the work of the single-stage part can make up for the problem of over-compression, and the work of the two-stage part can play a role in decomposing the pressure ratio and reducing the exhaust temperature, thereby obtaining a new structure that comprehensively responds to different working conditions and maintains high efficiency and high reliability, and can simultaneously solve the problem of excessively high exhaust temperature and low energy efficiency of the compressor, improve the energy efficiency of the compressor and reduce the exhaust temperature. The present invention combines the advantages of single-stage compression and two-stage compression, can comprehensively respond to different working conditions, and improves the overall energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a longitudinal sectional view of a rotor compressor pump body of the present invention;

[0031] Figure 2 is a top view of a first cylinder of a rotary compressor pump body of the present invention;

[0032] Figure 3 It is a schematic diagram of the compression process of the intermediate pressure section of the first cylinder of the rotary compressor pump body of the present invention;

[0033] Figure 4 It is a schematic diagram of the compression process of the high-pressure section of the first cylinder of the rotary compressor pump body of the present invention;

[0034] Figure 5 is a top view of a first flange of a rotor compressor pump body of the present invention;

[0035] Figure 6 is a top view of a partition of a rotor compressor pump body of the present invention;

[0036] Figure 7 It is a longitudinal cross-sectional view (medium-pressure section flow path diagram) of the rotor compressor pump body of the present invention;

[0037] Figure 8 It is a longitudinal cross-sectional view (high-pressure section flow path diagram) of the rotor compressor pump body of the present invention;

[0038] Fig. 9 It is a curve diagram comparing the energy efficiency ratio of the rotary compressor pump body of the present invention with that of the existing single-stage compression and two-stage compression;

[0039] Fig.10 It is a comparison curve of the exhaust temperature of the rotor compressor pump body of the present invention and the existing single-stage compression and two-stage compression;

[0040] Fig.11 It is a single-stage compression schematic;

[0041] Fig.12 It is a double-stage compression schematic.

[0042] The accompanying drawings are marked as follows:

[0043] 1. First cylinder; 2. Second cylinder; 3. First air intake port; 4. First air outlet; 5. Second air outlet; 6. Second air intake port; 7. Third air outlet; 8. First vane; 9. First vane groove; 10. Roller; 11. First dividing line; 12. Second dividing line; 13. First flange; 14. First exhaust port; 15. Partition; 16. Middle cavity; 17. Second flange; 18. Muffler; 19. Third exhaust port; 20. Exhaust cavity; 21. First flow hole; 22. Second flow hole; 23. Third flow hole; 24. Fourth flow hole; 25. Fifth flow hole; 26. Shell; 27. Second exhaust port; 28. Second roller; 29. ​​Crankshaft; 30. Air supply channel; 31. Air supply port. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] 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.

[0046] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0047] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0048] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0049] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0050] Fig.11The figure shows a single-stage compression principle diagram. After the compressor inhales the low-temperature and low-pressure refrigerant from the evaporator, it compresses it to obtain high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant enters the condenser for heat exchange, then passes through the throttling device to reduce the pressure, and enters the evaporator again for heat exchange to obtain low-temperature and low-pressure refrigerant to complete the cycle.

[0051] Fig.12 The figure shows the principle diagram of two-stage compression. Compared with single-stage compression, the system adds a flash evaporator and a throttling device. The low-temperature and low-pressure refrigerant from the evaporator is first sucked into the low-pressure compression part of the compressor. The low-pressure part is compressed to obtain medium-pressure refrigerant. This part of medium-pressure refrigerant is mixed with the medium-pressure refrigerant from the flash evaporator and then sucked into the high-pressure cylinder. It is compressed again to obtain high-temperature and high-pressure refrigerant. This high-temperature and high-pressure refrigerant enters the condenser for heat exchange, then enters the primary throttling device for pressure reduction, and then enters the flash evaporator. The saturated gas in the flash evaporator enters the medium-pressure chamber of the compressor, and the saturated liquid continues to be depressurized through the secondary throttling device. Finally, after heat exchange in the evaporator, the low-temperature and low-pressure refrigerant is obtained, completing the two-stage cycle.

[0052] The moving parts of the rolling rotor compressor are only the crankshaft, roller and vane. The gas is directly discharged into the outer shell to cool the motor first, and then discharged outside the shell. A cylindrical roller is installed in the cylindrical cylinder. The roller is driven by the crankshaft to rotate in the cylinder cavity. The rotation center of the roller coincides with the center of the cylinder, but the outer surface of the roller and the center line of the roller rotation are asymmetrical. In the middle above the cylinder, a vane that can slide back and forth is installed. The vane moves back and forth with the action of the spring. The arc end of the vane is always in contact with the outer surface of the roller. Therefore, the vane, the inner surface of the cylinder, the outer surface of the roller, and the upper and lower flanges on the upper and lower sides of the cylinder form a closed volume, which changes with the rotation position of the roller.

[0053] For a two-cylinder compressor, when it is a single-stage compression, the first cylinder 1 and the second cylinder 2 are in parallel relationship, and the first cylinder 1 and the second cylinder 2 are directly discharged from the pump body after completing compression. For relatively severe working conditions, when the high and low pressure ratios are large, the exhaust temperature will be high, which will affect the reliability of the compressor.

[0054] In order to make the compressor operate reliably under such harsh working conditions, a two-stage compression method is adopted. At this time, the first cylinder 1 and the second cylinder 2 are in series. After the first cylinder 1 completes the first-stage compression, the obtained medium-pressure refrigerant is discharged into the medium-pressure cavity of the pump body. The medium-pressure replenishing air from the system flash evaporator enters the medium-pressure cavity and mixes with the medium-pressure refrigerant of the first-stage exhaust to play a cooling role. Then the second cylinder 2 inhales air from the medium-pressure cavity and obtains high-pressure refrigerant after completing the second-stage compression. However, for low-load conditions with a small compression ratio, unnecessary decomposition of the compression ratio will cause over-compression and reduce the efficiency of the compressor.

[0055] In view of the advantages and disadvantages of the above single-stage compression and two-stage compression, the present invention designs a new compressor pump body structure.

[0056] like Figure 1-10 As shown, the present invention provides a rotor compressor pump body, which includes:

[0057] A first cylinder 1 and a second cylinder 2, wherein the first cylinder 1 has a first air intake port 3, a first air outlet port 4 and a second air outlet port 5, and the second cylinder 2 has a second air intake port 6 and a third air outlet port 7. The first cylinder 1 can inhale gas from the first air intake port 3 and compress it in the first cylinder 1. The first air outlet port 4 and the second air outlet port 5 are arranged at different positions on the first cylinder 1. The first air outlet port 4 can be connected with the second air intake port 6 of the second cylinder 2, so that the gas discharged from the first air outlet port 4 enters the second cylinder 2 through the second air intake port 6 for compression, forming a two-stage compression. The compressed gas in the first cylinder 1 can also be discharged through the second air outlet port 5 and mixed with the gas compressed in the second cylinder 2 and discharged through the third air outlet 7.

[0058] The present invention is provided with more than two cylinders, and in particular, two air outlets are provided on the first cylinder, so that the gas discharged from the first air outlet in the first cylinder can enter the second cylinder for compression, thereby forming a two-stage compression. At the same time, through the second air outlet opened on the first cylinder, part of the gas can form a single-stage compression in the first cylinder and be discharged from the second air outlet, so that the pump body can simultaneously operate both single-stage compression and two-stage compression. Among them, the work of the single-stage part can make up for the problem of over-compression, and the work of the two-stage part can play a role in decomposing the pressure ratio and reducing the exhaust temperature, thereby obtaining a new structure that comprehensively responds to different working conditions and maintains high efficiency and high reliability, and can simultaneously solve the problem of excessively high exhaust temperature and low energy efficiency of the compressor, improve the energy efficiency of the compressor and reduce the exhaust temperature. The present invention combines the advantages of single-stage compression and two-stage compression, can comprehensively respond to different working conditions, and improves the overall energy efficiency.

[0059] Figure 1The figure shows the assembly diagram of the pump structure of the present patent. The first flange 13 (upper flange) is located above the first cylinder 1, and the partition 15 is located below the first cylinder 1. The partition includes a first partition and a second partition. The first partition is a hollow structure and forms an intermediate cavity with the second partition. The second partition is located above the second cylinder 2, and the second flange 17 (lower flange) is located below the second cylinder 2. A muffler 18 is arranged below the second flange. The muffler 18 can have a certain noise reduction effect and can isolate the exhaust of the second cylinder 2 from being connected to the oil pool. In the present patent, the first cylinder 1 is a low-pressure cylinder, and the second cylinder 2 is a high-pressure cylinder. The displacement of the first cylinder 1 is greater than that of the second cylinder 2 (the second cylinder 2 is a secondary cylinder, that is, after the first cylinder 1 completes compression, the second cylinder 2 is further compressed. Based on the change in pressure, the displacement of the second cylinder 2 needs to be smaller than that of the first cylinder 1).

[0060] Among them, the first cylinder 1 is as follows Figure 2 As shown, the cylinder has two crescent grooves in the circumferential direction, and the two crescent grooves are located on the upper and lower sides of the cylinder. Compared with the conventional double exhaust cylinder, the angles of the two crescent grooves on the circumference of the patent structure are different. Among them, the first crescent groove (i.e., the first air outlet 4) corresponds to the first exhaust port 14 set on the upper flange, and the second crescent groove (i.e., the second air outlet 5) corresponds to the second exhaust port 27 set on the partition 15. Figure 3 As shown, when the work starts, the first cylinder 1 sucks in low-pressure refrigerant through the air intake port. Based on the characteristics of the two-stage compression method, the pressure of the medium-pressure chamber can be controlled by the air supply port on the partition 15. After the intermediate pressure is given, during the compression process of the first cylinder 1, when the compression chamber pressure reaches the intermediate chamber pressure, it will first be exhausted through the first crescent groove (first air outlet 4) until the position of the roller 10 exceeds the first air outlet 4, and this section of compression is completed. At this time, the discharged refrigerant is medium pressure. Then the roller continues to rotate and continues to compress the refrigerant, as shown in FIG. Figure 4 As shown, after the remaining refrigerant reaches the high pressure given by the working condition, it will be exhausted through the second crescent groove (second air outlet 5). At this time, the refrigerant discharged from the compression part is high-pressure refrigerant. By adjusting the relative positions of the first air outlet 4 and the second air outlet 5, the displacement ratio of the single-stage compression part and the two-stage compression part in the first cylinder 1 can be changed. Among them, the ratio of the displacement used for the two-stage compression part to the displacement of the high-pressure cylinder is manifested as a different volume ratio, and the energy efficiency performance under different application conditions will be different.

[0061] like Fig. 9 As shown in the figure, as the operating pressure ratio increases, the energy efficiency of both single-stage compression and two-stage compression will decrease. There is a certain pressure ratio value, so that when the operating pressure ratio is less than the limit value, single-stage compression is optimal; when it is greater than the limit value, two-stage compression is optimal. The compression method of the present invention combines single-stage compression and two-stage compression, and its energy efficiency is also between the two, which makes the present invention have advantages in comprehensive energy efficiency. Fig.10As shown, two-stage compression is obviously better than single-stage compression in terms of exhaust temperature. Based on the fact that there is a process of mixing single-stage compression exhaust and two-stage compression exhaust during the compression process of the present invention, the exhaust temperature of the present invention is between single-stage compression and two-stage compression, and the application range is wider than that of a single-stage compressor.

[0062] Compared with the existing method of arranging two slides in the same cylinder to form a two-stage compression, the present invention does not add a slide in the same cylinder, and the exhaust chambers corresponding to the two crescents are different. It can increase the displacement and volumetric efficiency, and there will not be three pressures in one cylinder at the same time, which will not cause gas leakage or reduce the leakage rate.

[0063] In some embodiments,

[0064] The gas pressure at the first gas outlet 4 is lower than the gas pressure at the second gas outlet 5; and / or, the first gas outlet 4 is a groove structure opened on the end face of one axial side of the first cylinder 1, and the second gas outlet 5 is a groove structure opened on the end face of the other axial side of the first cylinder 1.

[0065] This is a preferred structural form of the first air outlet and the second air outlet of the first cylinder of the present invention. The position of the first air outlet is set at a position with a lower pressure than that of the second air outlet, so that the gas in the first cylinder can be discharged through the first air outlet to the second cylinder for further compression when compressed to the medium pressure, thereby forming a two-stage compression. Since the pressure of the second air outlet is greater than that of the first air outlet, the high-pressure pressure of the second air outlet compressed by the first cylinder is directly discharged into the shell and mixed with the gas discharged from the second cylinder after completing the two-stage compression, so that the gas pressure values ​​after single-stage compression and two-stage compression are in a close range, or the difference is not large, or they are equal, which can effectively avoid In order to avoid the situation where pressure loss is caused by the large pressure difference when the two gases are mixed, the combined structure of single-stage compression + two-stage compression of the present invention can reduce the exhaust temperature, improve energy efficiency, and reduce the mixing pressure loss at the same time, thereby further improving energy efficiency; and the present invention further sets the first air outlet as a groove structure on the end face on one axial side, and the second air outlet is set as a groove structure facing the end face on the other axial side, so that the gas discharged from the first air outlet can enter the second cylinder for compression, while the second air outlet is discharged into the shell toward the other side, forming different medium-pressure exhaust and high-pressure exhaust on both sides, thereby ensuring that the combination of single-stage compression and two-stage compression can be achieved.

[0066] In some embodiments,

[0067] It also includes a first slide 8 and a roller 10. The first cylinder 1 is provided with a first slide groove 9. The first slide 8 is at least partially inserted in the first slide groove 9. The roller 10 is arranged in the hollow inner cavity of the first cylinder 1. The first slide 8 and the roller 10 can divide the hollow inner cavity of the first cylinder 1 into an intake cavity and a compression cavity. The first intake port 3 is connected to the intake cavity, and the first air outlet 4 and the second air outlet 5 are both connected to the compression cavity, and the second air outlet 5 is arranged at a position close to the first slide groove 9 relative to the first air outlet 4. With the movement of the roller 10, part of the gas in the compression cavity is first discharged from the first air outlet 4, and part or all of the remaining gas is further compressed in the compression cavity and discharged from the second air outlet 5.

[0068] This is the preferred structural form of the first cylinder of the compressor of the present invention, that is, the first vane and the roller divide the inner cavity of the first cylinder into an intake cavity and a compression cavity, the first intake port is connected with the intake cavity so that air can be introduced into the intake cavity through the first intake port, the first outlet port and the second outlet port are both connected with the compression cavity, so that the gas compressed in the compression cavity can be discharged through the first and second outlet ports respectively, ensuring that the gas discharged from the two outlet ports is compressed gas with a certain pressure, and the second outlet port is arranged close to the first vane groove relative to the first outlet port, so that the compression path of the roller during movement is longer, and finally the space of the compression cavity is smaller, so that the exhaust pressure of the second outlet port is greater than the exhaust pressure of the first outlet port, so that the gas pressure discharged from the second outlet port after single-stage compression is the same as the exhaust pressure after two-stage compression. The gap will not be too large, thereby reducing the pressure loss when the gases are mixed after single-stage and two-stage compression, and can further improve energy efficiency; and due to the setting positions of the first and second air outlets of the present invention, part of the gas in the compression chamber can be compressed to medium pressure, that is, the roller discharges part of the gas with medium pressure in the compression chamber when it moves to the vicinity of the first air outlet, and the roller can discharge the gas with high pressure in the compression chamber only when it moves to the vicinity of the second air outlet, so that the operation process of the first cylinder (rotation of the roller) is the same as that of the conventional cylinder and roller, and the exhaust after the first stage compression of the two-stage compression and the exhaust process of the single-stage compression can be completed during the normal movement of the roller, effectively realizing the combination of single-stage + two-stage compression, and solving the problems of high exhaust temperature and low energy efficiency.

[0069] In some embodiments,

[0070] In the axial projection plane, the center line of the first vane slot 9 passes through the center of the first cylinder 1 and forms a first dividing line 11, the first air intake port 3 is arranged on the first cylinder 1 and is located on one side of the first dividing line 11, the first air outlet 4 and the second air outlet 5 are both arranged on the first cylinder 1 and are located on the other side of the first dividing line 11, and the second dividing line 12 passes through the center of the first cylinder 1 and is perpendicular to the first dividing line 11, and the first air outlet 4 is located on the side of the second dividing line 12 away from the first vane slot 9, and the second air outlet 5 is located on the side of the second dividing line 12 close to the first vane slot 9.

[0071] This is a further preferred structural form of the first air outlet and the second air outlet of the present invention, that is, the first air outlet is located on the side of the second dividing line away from the first vane groove, and the second air outlet is located on the side of the second dividing line close to the first vane groove, so that the first air outlet is arranged in the medium-pressure zone of the compression chamber, and the second air outlet is arranged in the high-pressure zone of the compression chamber, which further creates a pressure difference between the two. The gas in the medium-pressure zone is discharged to the second cylinder through the first air outlet for secondary compression, and the gas in the high-pressure zone is discharged to the inside of the shell through the second air outlet to complete single-stage compression. When the roller moves to the medium-pressure zone, it can automatically discharge part of the gas with medium pressure in the compression chamber, and when the roller moves to the high-pressure zone, it can automatically discharge the gas with high pressure in the compression chamber, effectively realizing the combination of single-stage + two-stage compression, and at the same time solving the problems of high exhaust temperature and low energy efficiency.

[0072] In some embodiments,

[0073] In the axial projection plane, the first gas outlet 4 and the second gas outlet 5 are both in the form of a crescent groove, which is the preferred structural form of the first gas outlet and the second gas outlet of the present invention. The crescent groove is convenient for processing and can discharge the gas in the inner cavity of the cylinder.

[0074] The working chamber of the first cylinder 1 of the present invention is divided into two parts, one part performs primary compression and the other part performs secondary compression. An intermediate chamber (i.e., medium-pressure chamber) is arranged inside the pump body, which is composed of two partitions. The second cylinder 2 serves as a high-pressure cylinder and inhales air from the medium-pressure chamber.

[0075] There are crescent grooves on both sides of the first cylinder 1, and the two crescent grooves are at different positions on the circumference; among them, the first crescent groove (first air outlet 4) corresponds to the second exhaust port 27, the second crescent groove (second air outlet 5) corresponds to the first exhaust port 14, and the second exhaust port 27 is connected to the medium-pressure chamber of the pump body.

[0076] The medium-pressure refrigerant obtained by partial compression of the first cylinder 1 through the first-stage compression enters the medium-pressure chamber; the high-pressure refrigerant obtained by partial compression of the first cylinder 1 through the single-stage compression is discharged from the pump body through the first exhaust port 14. The second cylinder 2 inhales the medium-pressure refrigerant from the medium-pressure chamber, performs two-stage compression, and then discharges it from the pump body through the third exhaust port 19; finally, the refrigerants from the first exhaust port 14 and the third exhaust port 19 are mixed outside the pump body to achieve temperature neutralization.

[0077] In some embodiments,

[0078] It also includes a first flange 13, which is arranged on the axial side of the first cylinder 1 away from the second cylinder 2, so that the first air outlet 4 is arranged toward the side of the second cylinder 2, and the second air outlet 5 is arranged toward the side of the first flange 13;

[0079] A first exhaust port 14 is axially arranged on the first flange 13 , and the first exhaust port 14 is axially arranged opposite to and connected to the second air outlet 5 of the first cylinder 1 , so that the gas discharged from the first cylinder 1 through the second air outlet 5 can be discharged through the first exhaust port 14 of the first flange 13 .

[0080] The present invention preferably uses the first flange so that the second outlet of the first cylinder faces the first flange, and through the first exhaust port on the first flange, part of the gas after single-stage compression of the first cylinder can be discharged to the inside of the shell through the first exhaust hole on the first flange, thereby completing the effect of single-stage compression and exhaust.

[0081] In some embodiments,

[0082] It also includes a partition 15, which is arranged between the first cylinder 1 and the second cylinder 2 in the axial direction. The partition 15 has a second exhaust port 27 and an intermediate cavity 16. The first air outlet 4 is connected with the intermediate cavity 16 through the second exhaust port 27, and the intermediate cavity 16 is also connected with the second air intake port 6 of the second cylinder 2; an air supply channel 30 is also provided on the first cylinder 1, and an air supply port 31 is also provided on the partition 15. The air supply channel 30 can be connected with external air supply, and the air supply port 31 is connected between the air supply channel 30 and the intermediate cavity 16, so as to supply air to the second cylinder 2.

[0083] The present invention further includes a partition, which is arranged between the first and second cylinders. The function of the partition is to isolate, seal and support the compression chambers of the two cylinders. A second exhaust port and an intermediate cavity are also provided on the partition of the present invention, which can guide the gas compressed to the medium pressure in the first cylinder into the intermediate cavity through the second exhaust port relative to the first exhaust port for buffering. The intermediate cavity is then connected to the second intake port of the second cylinder, so that the medium-pressure gas can be guided to the second cylinder, effectively achieving the effect of two-stage compression; the present invention further preferably provides an air supply channel on the first cylinder, and an air supply port on the partition, which can be connected to the intermediate cavity, so that when air supply is needed, the gas can be supplied to the intermediate cavity through the air supply channel and the air supply port for mixing and buffering, and then guided to the second cylinder to form medium-pressure air supply to the second cylinder, so as to meet the air supply and enthalpy increase requirements of the two-stage compression.

[0084] On the other hand, regarding the medium-pressure refrigerant discharged from the first cylinder 1, Figure 7 As shown, this part of the refrigerant first enters the middle cavity. Based on the characteristics of the two-stage compression method, this part of the exhaust gas will be mixed with the medium-pressure refrigerant from the system flash evaporator to play a cooling role. The air intake of the second cylinder 2 is connected to the medium-pressure cavity, so the second cylinder 2 inhales the medium-pressure refrigerant from the medium-pressure cavity through its air intake. After completing the secondary compression, this part of the compressed refrigerant will be discharged through the third exhaust port 19 and enter the cavity composed of the lower flange and the muffler. Here, the muffler plays the role of reducing aerodynamic noise on the one hand and isolating the high-pressure refrigerant from the oil pool on the other hand. The structure of this patent is provided with an exhaust flow hole from top to bottom. At this time, the high-pressure refrigerant in the cavity composed of the lower flange and the muffler is discharged through the exhaust flow hole. Compared with the high-pressure exhaust refrigerant of the first cylinder 1, the high-pressure refrigerant generated by the secondary compression of the second cylinder 2 has a mixed cooling effect due to the medium-pressure replenishment air from the system flash evaporator. The temperature of this part of the high-pressure refrigerant will be lower than the temperature of the refrigerant discharged from the high-pressure compressed part of the first cylinder 1. Finally, the two parts of high-pressure refrigerant are mixed in the shell cavity to achieve the effect of reducing the final exhaust temperature.

[0085] In some embodiments,

[0086] It also includes a second flange 17 and a muffler 18. The second flange 17 is arranged on the axial end face of the second cylinder 2 which is away from the partition 15. The second flange 17 is provided with a third exhaust port 19. The third exhaust port 19 is opposite to and connected with the third exhaust port 7 of the second cylinder 2. The muffler 18 is covered on the axial side of the second flange 17 which is away from the second cylinder 2, and an exhaust chamber 20 is formed between the muffler 18 and the second flange 17. The exhaust chamber 20 is connected with the third exhaust port 19.

[0087] The present invention also preferably includes a second flange and a muffler, and an exhaust chamber is formed between the muffler and the second flange, so that the gas after secondary compression in the second cylinder can be introduced into the exhaust chamber for buffering and then discharged into the shell.

[0088] In some embodiments,

[0089] A first flow hole 21 is axially provided on the first flange 13 and penetrates through both axial ends thereof, a second flow hole 22 is axially provided on the first cylinder 1 and penetrates through both axial ends thereof, a third flow hole 23 is axially provided on the partition plate 15 and penetrates through both axial ends thereof, a fourth flow hole 24 is axially provided on the second cylinder 2 and penetrates through both axial ends thereof, a fifth flow hole 25 is axially provided on the second flange 17 and penetrates through both axial ends thereof, the first flow hole 21, the second flow hole 22, the third flow hole 23, the fourth flow hole 24 and the fifth flow hole 25 are all axially opposite to each other and are connected in sequence, the fifth flow hole 25 is connected with the exhaust chamber 20, so that the gas compressed by the second cylinder 2 passes through the exhaust chamber 20, the fifth flow hole 25, the fourth flow hole 24, the third flow hole 23, the second flow hole 22 and the first flow hole 21 in sequence and is discharged.

[0090] The present invention further preferably discharges the gas after secondary compression in the exhaust chamber into the shell through multiple flow holes arranged on the first flange, the first cylinder, the second cylinder, the partition and the second flange, so as to mix with the gas after single-stage compression in the shell, thereby forming a structure combining single-stage compression + two-stage compression, and solving the problems of low energy efficiency and high exhaust temperature.

[0091] In some embodiments,

[0092] It also includes a shell 26, and the first cylinder 1 and the second cylinder 2 are both arranged inside the shell 26. The compressed gas in the first cylinder 1 is discharged into the shell 26 through the second gas outlet 5, and the compressed gas in the second cylinder 2 is discharged into the shell 26 through the third gas outlet 7. The gas compressed by the first cylinder 1 and the gas compressed by the second cylinder 2 are mixed in the shell 26.

[0093] The present invention preferably discharges the gas after single-stage compression in the first cylinder into the shell through the second air outlet, and mixes with the gas after two-stage compression in the second cylinder through the third air outlet into the shell, thereby completing the mixing of single-stage compression and two-stage compression gases in the shell, forming a structure combining single-stage compression + two-stage compression, and solving the problems of low energy efficiency and high exhaust temperature.

[0094] The present invention also provides a compressor, which comprises the above-mentioned rotor compressor pump body.

[0095] The present invention can solve the following technical problems:

[0096] Single-stage compressors cannot be used in harsh working conditions due to compression ratio and exhaust temperature limitations; two-stage compressors have the characteristic of decomposing the compression ratio, which enables them to operate stably and reliably under harsh working conditions. However, when two-stage compressors are used in normal working conditions, there will be a problem of over-compression resulting in low energy efficiency.

[0097] Therefore, the present invention provides a new structure that can combine the advantages of two-stage compression and single-stage compression, taking into account different application conditions, while solving the problem of low energy efficiency caused by over-compression and the problem of excessive exhaust temperature.

[0098] The present invention also provides an air conditioner, which comprises the aforementioned compressor.

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A rotor compressor pump body, characterized in that: include: A first cylinder (1) and a second cylinder (2), wherein the first cylinder (1) has a first air intake port (3), a first air outlet port (4) and a second air outlet port (5), and the second cylinder (2) has a second air intake port (6) and a third air outlet port (7); the first cylinder (1) can inhale gas from the first air intake port (3) and compress it in the first cylinder (1); the first air outlet port (4) and the second air outlet port (5) are arranged at different positions on the first cylinder (1); the first air outlet port (4) can be connected to the second air intake port (6) of the second cylinder (2), so that the gas discharged from the first air outlet port (4) enters the second cylinder (2) through the second air intake port (6) for compression, thereby forming a two-stage compression; the gas compressed in the first cylinder (1) can also be discharged through the second air outlet port (5) and mixed with the gas compressed in the second cylinder (2) and discharged through the third air outlet port (7); The gas pressure at the first gas outlet (4) is lower than the gas pressure at the second gas outlet (5); and / or the first gas outlet (4) is a groove structure opened on the end face of one axial side of the first cylinder (1), and the second gas outlet (5) is a groove structure opened on the end face of the other axial side of the first cylinder (1).

2. The rotor compressor pump body according to claim 1, characterized in that: The invention also comprises a first slide vane (8) and a roller (10); a first slide vane groove (9) is provided on the first cylinder (1); the first slide vane (8) is at least partially inserted in the first slide vane groove (9); the roller (10) is arranged in the hollow inner cavity of the first cylinder (1); the first slide vane (8) and the roller (10) can divide the hollow inner cavity of the first cylinder (1) into an intake cavity and a compression cavity; the first intake port (3) is connected to the intake cavity; the first air outlet (4) and the second air outlet (5) are both connected to the compression cavity; and the second air outlet (5) is arranged at a position close to the first slide vane groove (9) relative to the first air outlet (4); as the roller (10) moves, part of the gas in the compression cavity is first discharged from the first air outlet (4); part or all of the remaining gas is further compressed in the compression cavity and discharged from the second air outlet (5).

3. The rotor compressor pump body according to claim 2, characterized in that: In the axial projection plane, the center line of the first vane groove (9) passes through the center of the first cylinder (1) and forms a first dividing line (11); the first air intake port (3) is arranged on the first cylinder (1) and is located on one side of the first dividing line (11); the first air outlet (4) and the second air outlet (5) are both arranged on the first cylinder (1) and are located on the other side of the first dividing line (11); a second dividing line (12) passes through the center of the first cylinder (1) and is perpendicular to the first dividing line (11); the first air outlet (4) is located on the side of the second dividing line (12) away from the first vane groove (9); and the second air outlet (5) is located on the side of the second dividing line (12) close to the first vane groove (9).

4. The rotor compressor pump body according to claim 1, characterized in that: In the axial projection plane, the first air outlet (4) and the second air outlet (5) are both in the form of crescent-shaped structures.

5. The rotor compressor pump body according to claim 1, characterized in that: It also comprises a first flange (13), the first flange (13) being arranged on an axial side of the first cylinder (1) away from the second cylinder (2), so that the first air outlet (4) is arranged toward a side of the second cylinder (2), and the second air outlet (5) is arranged toward a side of the first flange (13); A first exhaust port (14) is axially penetrated on the first flange (13); the first exhaust port (14) is axially arranged opposite to and connected to the second exhaust port (5) of the first cylinder (1), so that the gas discharged from the first cylinder (1) through the second exhaust port (5) can be discharged through the first exhaust port (14) of the first flange (13).

6. The rotor compressor pump body according to claim 5, characterized in that: The invention also comprises a partition plate (15), wherein the partition plate (15) is arranged between the first cylinder (1) and the second cylinder (2) in the axial direction, and the partition plate (15) has a second exhaust port (27) and an intermediate cavity (16), wherein the first exhaust port (4) is connected to the intermediate cavity (16) via the second exhaust port (27), and the intermediate cavity (16) is also connected to the second intake port (6) of the second cylinder (2); an air supply channel (30) is also arranged on the first cylinder (1), and an air supply port (31) is also arranged on the partition plate (15), wherein the air supply channel (30) can be connected to external air supply, and the air supply port (31) is connected between the air supply channel (30) and the intermediate cavity (16) so as to supply air to the second cylinder (2).

7. The rotor compressor pump body according to claim 6, characterized in that: The invention also comprises a second flange (17) and a muffler (18), wherein the second flange (17) is arranged on an axial end face of the second cylinder (2) which is away from the partition (15), and a third exhaust port (19) is arranged on the second flange (17), and the third exhaust port (19) is opposite to and communicated with the third exhaust port (7) of the second cylinder (2). The muffler (18) is covered on an axial side of the second flange (17) which is away from the second cylinder (2), and an exhaust chamber (20) is formed between the muffler (18) and the second flange (17), and the exhaust chamber (20) is communicated with the third exhaust port (19).

8. The rotary compressor pump body according to claim 7, characterized in that: A first flow hole (21) is provided on the first flange (13) and axially penetrates both axial ends thereof, a second flow hole (22) is provided on the first cylinder (1) and axially penetrates both axial ends thereof, a third flow hole (23) is provided on the partition plate (15) and axially penetrates both axial ends thereof, a fourth flow hole (24) is provided on the second cylinder (2) and axially penetrates both axial ends thereof, and a fifth flow hole (25) is provided on the second flange (17) and axially penetrates both axial ends thereof, the first flow hole (21), the second flow hole (22), the third flow hole (23), the fourth flow hole (24) and the fifth flow hole (25) are all axially opposite to each other and are connected in sequence, the fifth flow hole (25) is connected with the exhaust chamber (20), so that the gas compressed by the second cylinder (2) passes through the exhaust chamber (20), the fifth flow hole (25), the fourth flow hole (24), the third flow hole (23), the second flow hole (22) and the first flow hole (21) in sequence and is discharged.

9. The rotor compressor pump body according to any one of claims 1 to 8, characterized in that: It also includes a shell (26), wherein the first cylinder (1) and the second cylinder (2) are both arranged inside the shell (26), the gas compressed in the first cylinder (1) is discharged into the shell (26) through the second gas outlet (5), and the gas compressed in the second cylinder (2) is discharged into the shell (26) through the third gas outlet (7), and the gas compressed in the first cylinder (1) and the gas compressed in the second cylinder (2) are mixed in the shell (26).

10. A compressor, characterized in that: A rotor compressor pump body comprising any one of claims 1-9.

11. An air conditioner, characterized in that: Comprising the compressor as claimed in claim 10.

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