Rotary compressor pump body, compressor and air conditioner

Abstract

A rotary compressor pump body, a compressor, and an air conditioner. The rotary compressor pump body comprises: a first cylinder (1) and a second cylinder (2), the first cylinder (1) being provided with a first gas suction port (3), a first gas discharge port (4) and a second gas discharge port (5), and the second cylinder (2) being provided with a second gas suction port (6) and a third gas discharge port (7). The first cylinder (1) can suck a gas through the first gas suction port (3) and compress same in the first cylinder (1); the first gas discharge port (4) and the second gas discharge port (5) are arranged at different positions on the first cylinder (1); and the first gas discharge port (4) can communicate with the second gas suction port (6) of the second cylinder (2), such that the gas discharged from the first gas discharge port (4) enters the second cylinder (2) through the second gas suction port (6), and is compressed, thus forming secondary compression. The compressed gas in the first cylinder (1) can also be directly discharged through the second gas discharge port (5), and is mixed with the gas compressed in the second cylinder (2) and discharged through the third gas discharge port (7). The rotary compressor can solve the problems of over-high exhaust temperature and low energy efficiency of compressors, thereby promoting the energy efficiency of compressors while reducing the exhaust temperature.

Description

Rotor compressor pump body, compressor and air conditioner

[0001] This disclosure claims priority to the Chinese patent application filed with the China Patent Office on September 11, 2023, with application number 202311165169.8 and invention name “A Rotary Compressor Pump Body, Compressor and Air Conditioner”, the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0002] The present disclosure 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

[0003] Common rotary compressors can be divided into single-stage compressors and two-stage compressors based on different compression methods. Among them, 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 leading to low energy efficiency.

[0004] Since the compressors in the related art cannot solve technical problems such as excessively high exhaust temperature and low energy efficiency at the same time, the present invention studies and designs a rotor-type compressor pump body, a compressor and an air conditioner.

[0005] Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present disclosure is to overcome the defects of the compressor in the related 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.

[0007] In order to solve the above problems, the present disclosure provides a rotor compressor pump body, which includes:

[0008] 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 to the second intake port of the second cylinder, so that the gas discharged from the first outlet 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.

[0009] In some embodiments,

[0010] 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.

[0011] In some embodiments,

[0012] 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 to the intake chamber, the first outlet and the second outlet are both connected to the compression chamber, and the second outlet is provided at a position close to the first slide groove relative to the first outlet; with the movement of the roller, part of the gas in the compression chamber is first discharged from the first outlet, and part or all of the remaining gas is further compressed in the compression chamber and discharged from the second outlet.

[0013] In some embodiments,

[0014] 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 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. 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.

[0015] In some embodiments,

[0016] In the axial projection plane, both the first air outlet and the second air outlet are in the form of crescent-shaped structures.

[0017] In some embodiments,

[0018] The invention further comprises a first flange, wherein the first flange 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;

[0019] A first exhaust port is axially provided on the first flange. 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.

[0020] In some embodiments,

[0021] 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 to the intermediate cavity through the second exhaust port, and the intermediate cavity is also connected to 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 to be able 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 to be able to supply air to the second cylinder.

[0022] In some embodiments,

[0023] 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 air outlet 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. The exhaust chamber is connected with the third exhaust port.

[0024] In some embodiments,

[0025] A first flow hole is provided on the first flange axially extending through both axial ends thereof, a second flow hole is provided on the first cylinder axially extending through both axial ends thereof, a third flow hole is provided on the partition plate axially extending through both axial ends thereof, a fourth flow hole is provided on the second cylinder axially extending through both axial ends thereof, and a fifth flow hole is provided on the second flange axially extending through both axial ends thereof. 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 are 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.

[0026] In some embodiments,

[0027] It also includes a shell, the first cylinder and the second cylinder are both arranged inside the shell, the compressed gas in the first cylinder is discharged into the shell through the second gas outlet, and the compressed gas in the second cylinder is discharged into the shell through the third gas outlet, and the gas compressed by the first cylinder and the gas compressed by the second cylinder are mixed in the shell.

[0028] The present disclosure also provides a compressor, which includes the aforementioned rotor-type compressor pump body.

[0029] The present disclosure also provides an air conditioner, which includes the aforementioned compressor.

[0030] The present invention provides a rotary compressor pump body, a compressor, and an air conditioner with the following beneficial effects:

[0031] 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 can fully respond to different working conditions and maintain high efficiency and high reliability, and can simultaneously solve the problems 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 fully respond to different working conditions, and improve the overall energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a longitudinal sectional view of a rotary compressor pump body of the present disclosure;

[0033] FIG2 is a top view of the first cylinder of the rotary compressor pump body of the present disclosure;

[0034] 3 is a schematic diagram of the compression process of the intermediate pressure section of the first cylinder of the rotary compressor pump body disclosed in the present invention;

[0035] FIG4 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 disclosure;

[0036] 5 is a top view of the first flange of the rotary compressor pump body of the present disclosure;

[0037] FIG6 is a top view of a partition plate of a rotary compressor pump body of the present disclosure;

[0038] 7 is a longitudinal sectional view of the rotary compressor pump body (intermediate pressure section flow path diagram) of the present disclosure;

[0039] FIG8 is a longitudinal sectional view of the rotor compressor pump body (high-pressure section flow path diagram) of the present disclosure;

[0040] FIG9 is a graph comparing the energy efficiency ratios of the rotary compressor pump body of the present disclosure with those of the existing single-stage compression and two-stage compression;

[0041] FIG10 is a graph comparing the exhaust gas temperature of the rotary compressor pump body of the present disclosure with that of the conventional single-stage compression and two-stage compression;

[0042] Figure 11 is a schematic diagram of a single-stage compression principle;

[0043] Figure 12 is a schematic diagram of the two-stage compression principle.

[0044] The accompanying drawings are marked as follows: 1. First cylinder; 2. Second cylinder; 3. First air intake port; 4. First air outlet port; 5. Second air outlet port; 6. Second air intake port; 7. Third air outlet port; 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. Housing; 27. Second exhaust port; 28. Roller 2; 29. ​​Crankshaft; 30. Air supply channel; 31. Air supply port. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0046] 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 disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is 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, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0047] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0048] In the description of the present disclosure, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element 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 disclosure; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0049] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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.

[0050] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this disclosure.

[0051] Figure 11 shows a single-stage compression principle diagram. After the compressor inhales the low-temperature, low-pressure refrigerant from the evaporator, it compresses it to obtain high-temperature, high-pressure refrigerant. The high-temperature, high-pressure refrigerant enters the condenser for heat exchange, then passes through the throttling device for pressure reduction, and enters the evaporator again for heat exchange to obtain low-temperature, low-pressure refrigerant to complete the cycle.

[0052] Figure 12 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, low-pressure refrigerant from the evaporator is first sucked into the low-pressure stage compression part of the compressor. The low-pressure stage is compressed to obtain medium-pressure refrigerant. This medium-pressure refrigerant is mixed with the medium-pressure refrigerant from the flash evaporator and then sucked into the high-pressure stage cylinder. It is compressed again to obtain high-temperature, high-pressure refrigerant. This high-temperature, 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. The saturated liquid continues to pass through the secondary throttling device for pressure reduction. Finally, after heat exchange in the evaporator, the low-temperature, low-pressure refrigerant is obtained, completing the two-stage cycle.

[0053] The only moving parts of a rolling rotor compressor are the crankshaft, rollers, and vanes. Gas is discharged directly into the outer casing to cool the motor before being discharged outside. A cylindrical roller is installed in a cylindrical cylinder. Driven by the crankshaft, the roller rotates within the cylinder cavity. The roller's center of rotation coincides with the center of the cylinder, but the roller's outer surface is asymmetrical with respect to the roller's centerline. A vane is mounted in the center of the upper cylinder, allowing it to slide back and forth. This movement is driven by a spring. The arc-shaped end of the vane is in constant 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 that varies with the rotational position of the roller.

[0054] For a two-cylinder compressor, when it is a single-stage compression, the first cylinder 1 and the second cylinder 2 are connected in parallel. After the first cylinder 1 and the second cylinder 2 complete compression, they are directly discharged from the pump body. In relatively severe operating conditions, when the high and low pressure ratios are large, the exhaust temperature will be high, affecting the reliability of the compressor.

[0055] To ensure reliable operation under these harsh operating conditions, the compressor utilizes a two-stage compression system. The first cylinder (1) and the second cylinder (2) are connected in series. After completing the first stage of compression, the first cylinder (1) discharges the resulting medium-pressure refrigerant into the pump's intermediate-pressure chamber. Medium-pressure make-up air from the system's flash evaporator then enters the intermediate-pressure chamber, mixing with the intermediate-pressure refrigerant from the first stage exhaust, thereby cooling the compressor. The second cylinder (2) then draws air from the intermediate-pressure chamber, completing the second stage of compression to produce high-pressure refrigerant. However, in low-load conditions with a small compression ratio, unnecessary decomposition of the compression ratio can lead to overcompression and reduced compressor efficiency.

[0056] 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.

[0057] As shown in Figures 1-10, the present disclosure provides a rotor compressor pump body, which includes:

[0058] A first cylinder 1 and a second cylinder 2, the first cylinder 1 having a first intake port 3, a first outlet port 4 and a second outlet port 5, the second cylinder 2 having a second intake port 6 and a third outlet port 7, the first cylinder 1 can inhale gas from the first intake port 3 and compress it in the first cylinder 1, the first outlet port 4 and the second outlet port 5 are arranged at different positions on the first cylinder 1, the first outlet port 4 can be connected with the second intake port 6 of the second cylinder 2, so that the gas discharged from the first outlet port 4 enters the second cylinder 2 through the second 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 outlet port 5 and mixed with the gas compressed in the second cylinder 2 and discharged through the third outlet port 7.

[0059] 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 can fully respond to different working conditions and maintain high efficiency and high reliability, and can simultaneously solve the problems 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 fully respond to different working conditions, and improve the overall energy efficiency.

[0060] Figure 1 shows the assembly diagram of the pump body structure of this 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 provided 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 communicating with the oil pool. In this 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 further compresses. Based on the change in pressure, the displacement of the second cylinder 2 needs to be smaller than that of the first cylinder 1).

[0061] Among them, the first cylinder 1 is shown in Figure 2. 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 conventional double-exhaust cylinders, the angles of the two crescent grooves on the circumference of the upper and lower crescent grooves 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. As shown in Figure 3, when starting work, the first cylinder 1 inhales 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 roller 10 position exceeds the first air outlet 4, and this section of compression is completed. At this time, the discharged refrigerant is medium pressure. The roller then continues to rotate and compress the refrigerant. As shown in Figure 4, 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 of the two-stage compression part to the displacement of the high-pressure cylinder is manifested as a difference in volume ratio, and the energy efficiency performance under different application conditions will be different.

[0062] As shown in Figure 9, as the operating pressure ratio continues to increase, 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 disclosed in 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. As shown in Figure 10, two-stage compression is significantly 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, 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 single-stage compressors.

[0063] Compared with the existing method of setting 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 will not have three pressures in one cylinder at the same time, which will not cause gas leakage or reduce the leakage rate.

[0064] In some embodiments,

[0065] 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.

[0066] This is the preferred structural form of the first air outlet and the second air outlet of the first cylinder disclosed in 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 it is compressed to the medium pressure, thereby forming a two-stage compression. Since the pressure of the second air outlet is greater than the pressure of the first 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 close to each other, or the difference is not large, or they are equal, which can effectively avoid In order to avoid the situation where the two gases suffer pressure loss due to the large pressure difference when mixing, the combined structure of single-stage compression + two-stage compression disclosed in the present invention can reduce the exhaust temperature, improve energy efficiency, and reduce the mixing pressure loss while 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 sets the second air outlet 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 to the other side into the shell, forming different medium-pressure exhaust and high-pressure exhaust on both sides, ensuring that the combination of single-stage compression and two-stage compression can be achieved.

[0067] In some embodiments,

[0068] It also includes a first slide 8 and a roller 10. A first slide groove 9 is provided on the first cylinder 1. The first slide 8 is at least partially inserted in the first slide groove 9. The roller 10 is provided 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 chamber and a compression chamber. The first intake port 3 is connected to the intake chamber, and the first air outlet 4 and the second air outlet 5 are both connected to the compression chamber, and the second air outlet 5 is provided at a position close to the first slide groove 9 relative to the first air outlet 4. As the roller 10 moves, part of the gas in the compression chamber is first discharged from the first air outlet 4, and part or all of the remaining gas is further compressed in the compression chamber and discharged from the second air outlet 5.

[0069] This is the preferred structural form of the first cylinder of the compressor disclosed in 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 to 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 to 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 is greater than the exhaust pressure of the first outlet, so that the pressure of the gas discharged from the second outlet by single-stage compression is the same as the discharge 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 disclosed in 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 the operation mode 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.

[0070] In some embodiments,

[0071] 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 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. The 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.

[0072] This is a further preferred structural form of the first air outlet and the second air outlet disclosed in 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 area of ​​the compression chamber, and the second air outlet is arranged in the high-pressure area of ​​the compression chamber, which further creates a pressure difference between the two. The gas in the medium-pressure area is discharged to the second cylinder through the first air outlet for secondary compression, and the gas in the high-pressure area 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 area, it can automatically discharge part of the gas with medium pressure in the compression chamber, and when the roller moves to the high-pressure area, 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.

[0073] In some embodiments,

[0074] In the axial projection plane, the first air outlet 4 and the second air outlet 5 are both in the form of a crescent groove, which is the preferred structural form of the first and second air outlets disclosed in the present invention. The crescent groove is convenient for processing and can discharge the gas in the inner cavity of the cylinder.

[0075] The working chamber of the first cylinder 1 of the present disclosure is divided into two parts, one for primary compression and the other for secondary compression. An intermediate chamber (i.e., a medium-pressure chamber) is provided inside the pump body and is composed of two partitions. The second cylinder 2 serves as the high-pressure cylinder and draws air from the medium-pressure chamber.

[0076] There are crescent grooves on both sides of the first cylinder 1, and the two crescent grooves are located 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.

[0077] The intermediate-pressure refrigerant obtained by the partial compression of the first cylinder 1 through the first stage enters the intermediate-pressure chamber. The high-pressure refrigerant obtained by the partial compression of the first cylinder 1 through the single stage is discharged from the pump body through the first exhaust port 14. The second cylinder 2 draws the intermediate-pressure refrigerant from the intermediate-pressure chamber, performs a secondary compression, and then discharges the refrigerant 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 mix outside the pump body to achieve temperature neutralization.

[0078] In some embodiments,

[0079] 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;

[0080] A first exhaust port 14 is axially provided on the first flange 13. 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.

[0081] The present invention preferably uses the first flange to make the second outlet of the first cylinder face 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 interior of the shell through the first exhaust hole on the first flange, thereby completing the effect of single-stage compression and exhaust.

[0082] In some embodiments,

[0083] 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 to the intermediate cavity 16 through the second exhaust port 27. The intermediate cavity 16 is also connected to 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 to external air supply, and the air supply port 31 is connected between the air supply channel 30 and the intermediate cavity 16 to be able to supply air to the second cylinder 2.

[0084] The present disclosure 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 disclosure, which can guide the gas compressed to medium pressure in the first cylinder into the intermediate cavity through the second exhaust port relative to the first outlet for buffering. The intermediate cavity is then connected to the second intake port of the second cylinder, which can guide the medium-pressure gas into the second cylinder, effectively achieving the effect of two-stage compression; the present disclosure further preferably provides an air supply channel on the first cylinder, and an air supply port is provided on the partition, which can be connected with 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.

[0085] On the other hand, as shown in Figure 7, the medium-pressure refrigerant discharged from the first cylinder 1 first enters the intermediate chamber. Due to the characteristics of the two-stage compression method, this exhaust gas mixes with the medium-pressure refrigerant from the system flash evaporator, thus reducing its temperature. The intake port of the second cylinder 2 is connected to the intermediate-pressure chamber. Therefore, the second cylinder 2 draws in the intermediate-pressure refrigerant from the intermediate-pressure chamber through its intake port. After completing the second-stage compression, this compressed refrigerant is discharged through the third exhaust port 19 into the chamber formed by the lower flange and muffler. Here, the muffler serves to reduce aerodynamic noise and isolate the high-pressure refrigerant from the oil sump. The structure of this patent is equipped with an exhaust flow hole running from top to bottom. The high-pressure refrigerant in the chamber formed by the lower flange and muffler is discharged through this exhaust flow hole. Compared to the high-pressure exhaust refrigerant from the first cylinder 1, the high-pressure refrigerant generated by the second-stage compression of the second cylinder 2 has a cooling effect due to the mixing effect of the medium-pressure feed air from the system flash evaporator. The temperature of this high-pressure refrigerant is lower than that of the high-pressure compressed refrigerant discharged from the first cylinder 1. Finally, the two parts of high-pressure refrigerant are mixed in the shell cavity, achieving the effect of lowering the exhaust temperature.

[0086] In some embodiments,

[0087] 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 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 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.

[0088] The present disclosure also preferably includes a second flange and a muffler, and an exhaust chamber is formed between the muffler and the second flange, which can guide the gas after secondary compression in the second cylinder into the exhaust chamber for buffering and then discharge it into the shell.

[0089] In some embodiments,

[0090] A first flow hole 21 is provided on the first flange 13 axially through both axial ends thereof, a second flow hole 22 is provided on the first cylinder 1 axially through both axial ends thereof, a third flow hole 23 is provided on the partition plate 15 axially through both axial ends thereof, a fourth flow hole 24 is provided on the second cylinder 2 axially through both axial ends thereof, and a fifth flow hole 25 is provided on the second flange 17 axially 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 to 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.

[0091] The present disclosure further preferably discharges the gas in the exhaust chamber after secondary compression into the shell through multiple flow holes provided on the first flange, the first cylinder, the second cylinder, the partition and the second flange, thereby mixing with the gas after single-stage compression in the shell to form a structure combining single-stage compression + two-stage compression, and at the same time solves the problems of low energy efficiency and high exhaust temperature.

[0092] In some embodiments,

[0093] 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.

[0094] 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 it with the gas after two-stage compression in the second cylinder discharged into the shell through the third air outlet. The gas mixing effect of single-stage compression and two-stage compression can be completed in the shell, forming a structure combining single-stage compression + two-stage compression, while solving the problems of low energy efficiency and high exhaust temperature.

[0095] The present disclosure also provides a compressor, which includes the aforementioned rotor-type compressor pump body.

[0096] The present disclosure can solve the following technical problems:

[0097] 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, enabling 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.

[0098] Therefore, the present disclosure 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 excessive compression and the problem of excessively high exhaust temperature.

[0099] The present disclosure also provides an air conditioner, which includes the aforementioned compressor.

[0100] The above description is merely a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure. The above description is merely a preferred embodiment of the present disclosure. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present disclosure, and such improvements and variations shall also be considered within the scope of protection of the present disclosure.

Claims

1. A rotor compressor pump body, comprising: 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).

2. The rotary compressor pump body according to claim 1, wherein: The gas pressure at the first gas outlet (4) is lower than the gas pressure at the second gas outlet (5); 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).

3. The rotary compressor pump body according to claim 1, wherein: The gas pressure at the first gas outlet (4) is lower than the gas pressure at the second gas outlet (5).

4. The rotary compressor pump body according to claim 1, wherein: The first air outlet (4) is a groove structure opened on one axial end surface of the first cylinder (1), and the second air outlet (5) is a groove structure opened on the other axial end surface of the first cylinder (1).

5. The rotary compressor pump body according to any one of claims 2 to 4, wherein: 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).

6. The rotary compressor pump body according to claim 5, wherein: 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).

7. The rotary compressor pump body according to any one of claims 2 to 4, wherein: 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.

8. The rotary compressor pump body according to any one of claims 2 to 7, wherein: The first cylinder (1) further comprises a first flange (13), wherein the first flange (13) is 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). Side settings; 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).

9. The rotary compressor pump body according to claim 8, wherein: 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).

10. The rotary compressor pump body according to claim 9, wherein: 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).

11. The rotary compressor pump body according to claim 10, wherein: The first flange (13) is provided with a first flow hole (21) axially penetrating through both ends thereof, and the first cylinder (1) is provided with a second flow hole (22) axially penetrating through both ends thereof. A third flow hole (23) is provided on the partition (15) axially through both ends thereof, a fourth flow hole (24) is provided on the second cylinder (2) axially through both ends thereof, a fifth flow hole (25) is provided on the second flange (17) axially through both 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 to the exhaust chamber (20), so that the gas compressed by the second cylinder (2) is discharged 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.

12. The rotary compressor pump body according to any one of claims 1 to 11, wherein: 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).

13. A compressor comprising the rotor compressor pump body according to any one of claims 1 to 12.

14. An air conditioner comprising the compressor according to claim 13.

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