Compressor exhaust structure and compressor

Abstract

The present invention provides a compressor exhaust structure and a compressor, wherein the compressor exhaust structure includes: a stator and a rotor, a compression chamber formed between the rotor and the stator, a first exhaust port provided on the stator, and a first connecting hole provided on the rotor, the first exhaust port and the first connecting hole respectively communicating with the compression chamber, and the outlet of the first connecting hole at least partially communicating with the first exhaust port. According to the present invention, the defect of the prior art in which the scroll head of the exhaust driven scroll of the static scroll of the compressor intrudes, resulting in a reduced flow cross-sectional area of ​​the exhaust port, can be overcome, thereby improving the reliability of the compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to an exhaust structure of a compressor and a compressor. Background Art

[0002] Scroll compressors are widely used in commercial air conditioning systems, heat pumps, and refrigeration systems. They primarily consist of a housing, compression mechanism, support mechanism, drive mechanism, working fluid intake pipe, and working fluid discharge pipe. The orbiting scroll and fixed scroll are mounted on an upper bracket, 180 degrees out of phase with each other. An anti-rotation mechanism is located between the orbiting scroll and the upper bracket to prevent the orbiting scroll from rotating. Driven by the drive component and constrained by the anti-rotation mechanism, the orbiting scroll rotates linearly around the center of the fixed scroll at a base radius. These meshing chambers form a series of isolated compression chambers with continuously changing volumes. The refrigerant working fluid enters the scroll pump body through the intake pipe. The compression structure, formed by the spiral scrolls on the orbiting and fixed scrolls, draws in and compresses the refrigerant. The high-pressure gas compressed by the compression structure then exits the pump body through the exhaust port of the fixed scroll and into the housing. The high-pressure gas then enters the refrigeration cycle through the fluid discharge pipe on the housing.

[0003] As the technical requirements for commercial multi-split units and other refrigeration systems increase, scroll compressors are continuously developing towards high-speed operation. During the exhaust process, the exhaust port opened in the static scroll will be invaded by the scroll head on the passive scroll, squeezing the exhaust flow cross-sectional area and reducing the effective flow cross-sectional area. This will cause the exhaust resistance of the scroll compressor to increase rapidly under high-speed operating conditions, increase over-compression losses, reduce compression efficiency, and increase the energy consumption of the entire machine. At the same time, due to the severe over-compression under high-speed operating conditions, the pressure and temperature inside the pump body compression chamber are higher than those when operating at medium and low speeds, affecting the internal deformation of the pump body and the lubrication effect of the refrigeration oil, which will ultimately affect the operating reliability of the compressor.

[0004] Since the compressor in the prior art has a technical problem that the exhaust port of the static vortex may be invaded by the scroll head on the passive vortex, resulting in a reduction in the flow cross-sectional area of ​​the exhaust port, the present invention studies and designs an exhaust structure of the compressor and a compressor. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the scroll head on the exhaust passive vortex of the compressor static vortex invades, resulting in a reduction in the flow cross-sectional area of ​​the exhaust port, thereby providing a compressor exhaust structure and a compressor.

[0006] In order to solve the above problems, the present invention provides an exhaust structure of a compressor, which includes:

[0007] A static plate and a dynamic plate, a compression chamber is formed between the dynamic plate and the static plate, a first exhaust port is provided on the static plate, and a first connecting hole is provided on the dynamic plate. The first exhaust port and the first connecting hole are respectively connected to the compression chamber, and an outlet of the first connecting hole is at least partially connected to the first exhaust port.

[0008] In some embodiments, the movable plate includes a scroll, and the first communicating hole is provided on the scroll along the axial direction of the first exhaust port. When the first exhaust port is exhausting, the outlet of the first communicating hole is at least partially connected to the first exhaust port.

[0009] In some embodiments, an inlet of the first communicating hole is disposed on a side wall of the scroll, and an angle exists between a center line of the first communicating hole and a center line of the moving plate.

[0010] In some embodiments, the movable plate includes a base plate, a second exhaust port is provided on a side of the base plate facing the compression chamber, the second exhaust port is connected to the inlet of the first communicating hole, and the second exhaust port is located at the center of the base plate.

[0011] In some embodiments, a second communicating hole is provided on the substrate along a radial direction of the substrate, and the second exhaust port is connected to the first communicating hole through the second communicating hole.

[0012] In some embodiments, the second communication hole passes through the substrate, and a sealing member is provided at one end of the substrate facing away from the second exhaust port.

[0013] In some embodiments, the second exhaust port includes a first section and a second section, the first section is connected to the compression chamber, and both ends of the second section are respectively connected to the first section and the second connecting hole, and a valve plate is provided in the second section, and the valve plate can open or close the outlet of the first section.

[0014] In some embodiments, the inner diameter of the second section is larger than the inner diameter of the first section, a plurality of through holes are provided on the valve plate along the circumference of the second section, and the shortest distance between the through holes and the center of the valve plate is smaller than the inner diameter of the first section.

[0015] In some embodiments, the second section is provided with a fixing member and an elastic member, one end of the elastic member is connected to the valve plate, and the other end is connected to the fixing member, and the fixing member is an annular structure.

[0016] The present invention also provides a compressor, which includes the exhaust structure of the compressor described in any of the preceding items.

[0017] The exhaust structure of a compressor and the compressor provided by the present invention have the following beneficial effects:

[0018] When the scroll compressor is running at high speed, the exhaust flow rate increases, and when the head of the scroll of the moving disk invades the first exhaust port of the stationary disk, the exhaust resistance increases rapidly, the exhaust flow is difficult to discharge, the exhaust pressure rises, and part of the exhaust is repeatedly compressed, resulting in a high exhaust temperature. By providing a first connecting hole on the moving disk, the outlet of the first connecting hole is at least partially connected to the first exhaust port, and part of the exhaust flow flows out of the first exhaust port through the first connecting hole provided on the moving disk, reducing the invasion area of ​​the first exhaust port, increasing the effective exhaust flow cross-sectional area, reducing over-compression loss and the energy consumption of the compressor at high-speed operation, reducing the exhaust pressure and the exhaust temperature, and improving the overall operating reliability of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the exhaust structure of a compressor according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 A partial enlarged view of part A in FIG;

[0021] Figure 3 A top view of a first exhaust port in the exhaust structure of a compressor according to an embodiment of the present invention;

[0022] Figure 4 is a cross-sectional view of a moving plate in an exhaust structure of a compressor according to an embodiment of the present invention;

[0023] Figure 5 A top view of a first exhaust port in an exhaust structure of a compressor according to another embodiment of the present invention;

[0024] Figure 6 A cross-sectional view of a moving plate in an exhaust structure of a compressor according to another embodiment of the present invention;

[0025] Figure 7 Schematic diagram of the structure of a sealing member in the exhaust structure of a compressor according to an embodiment of the present invention;

[0026] Figure 8 This is a schematic structural diagram of a moving plate in the exhaust structure of a compressor according to an embodiment of the present invention.

[0027] The reference numerals indicate:

[0028] 1. Intake pipe; 2. Stator plate; 3. Rotor plate; 4. Upper bracket; 5. Exhaust pipe; 6. Stator; 7. Rotor; 8. Lower bracket assembly; 9. Oil suction pump; 10. Lower cover; 11. Oil sump; 12. Secondary balance block; 13. Main balance block; 14. Oil return cover; 15. Crankshaft; 16. Housing; 17. Cross ring; 18. Floating seal assembly; 19. Upper cover; 20. Seal; 21. First exhaust port; 22. Second connecting hole; 23. Second exhaust port; 24. First connecting hole; 25. Base plate; 26. Scroll. DETAILED DESCRIPTION

[0029] See also Figures 1 to 8 As shown, according to an embodiment of the present invention, there is provided an exhaust structure of a compressor, comprising: a stator plate 2 and a rotor plate 3, wherein a compression chamber is formed between the rotor plate 3 and the stator plate 2, a first exhaust port 21 is provided on the stator plate 2, and a first connecting hole 24 is provided on the rotor plate 3, wherein the first exhaust port 21 and the first connecting hole 24 are respectively connected to the compression chamber, and an outlet of the first connecting hole 24 is at least partially connected to the first exhaust port 21. In this technical solution, when the scroll compressor is running at high speed, the exhaust flow rate increases, and the scroll head of the rotor plate 3 invades the first exhaust port 21 of the stator plate 2, the exhaust resistance increases rapidly, the exhaust airflow is difficult to be discharged, the exhaust pressure rises, and part of the exhaust is repeatedly compressed, resulting in a high exhaust temperature. A first connecting hole 24 is provided on the movable plate 3, and the outlet of the first connecting hole 24 is at least partially connected to the first exhaust port 21. Part of the exhaust gas flow flows out from the first exhaust port 21 through the first connecting hole 24 provided on the movable plate 3, thereby reducing the intrusion area of ​​the first exhaust port 21, increasing the effective exhaust flow cross-sectional area, reducing over-compression loss and energy consumption of high-speed operation of the compressor, reducing exhaust pressure, reducing exhaust temperature, and improving the operating reliability of the entire compressor.

[0030] The compressor of the present invention is mainly composed of a motor stator 6, a rotor 7, an upper bracket 4, a lower bracket assembly 8, a stator 2, a moving disc 3, a cross slip ring 17, a crankshaft 15, etc. The motor stator 6 is fixed to the housing 16 by shrink fitting, and the upper bracket 4 is fixed to the housing 16 by spot welding. The moving disc 3 and the stator 2 are mounted on the upper bracket 4 opposite to each other with a phase angle difference of 180°. The moving disc 3 moves under the drive of the crankshaft 15. The moving disc and the stator 2 engage to form a series of crescent-shaped closed cavities that are isolated from each other and have continuously changing volumes, namely compression chambers. The stator 2 is fixed to the upper bracket 4 by screw fasteners. The lower bracket assembly 8 is fixed to the housing 16 by spot welding. When the compressor is running, the motor rotor 7 drives the crankshaft 15 to rotate, and the crank of the crankshaft 15 drives the moving scroll 3 to move. Under the anti-rotation constraint of the cross slip ring 17, the moving disc 3 rotates linearly around the center of the crankshaft 15 with a fixed radius e. The crankshaft 15 and the rotor 7 are provided with a main balancing weight 13 and a secondary balancing weight 12, respectively, for balancing the eccentric mass of the moving disk 3. The floating seal assembly 18 enables axial sealing of the continuously sealed compression chamber of the vortex pump body. The refrigerant entering through the vortex suction pipe 1 provided in the upper cover 19 is sucked into the crescent-shaped suction chamber formed by the moving scroll 3 and the stator 2. After compression, it is discharged through the exhaust hole 21 of the stator 2, entering the chamber between the upper cover 19 and the stator 2, and then entering the chamber between the upper support 4 and the motor stator 6 through the exhaust groove of the stator 2 and the upper support 4. Part of it enters the lower end of the motor stator 6 through the flow groove between the motor stator 6 and the housing 16. Finally, the high-pressure exhaust refrigerant is discharged through the vortex exhaust pipe 5.

[0031] Since a refrigeration oil circuit is also opened on the crankshaft 15, when the refrigeration oil compressor is static, the refrigeration oil is concentrated in the compressor lower cover 10 to form an oil pool 11. After the compressor is started, the refrigeration oil is led to the oil pump port on the crankshaft 15 through the oil suction pump 9, and then lubricated parts are lubricated. Finally, it returns to the compressor oil pool 11 through the oil return hole and oil return cover 14 of the upper bracket 4, completing the cycle.

[0032] In some embodiments, the movable disc 3 includes a scroll 26. The first connecting hole 24 is provided on the scroll 26 along the axial direction of the first exhaust port 21. When the first exhaust port 21 is exhausting, the outlet of the first connecting hole 24 is at least partially connected to the first exhaust port 21. In this technical solution, the first connecting hole 24 is provided on the scroll 26 along the axial direction of the first exhaust port 21. When the first exhaust port 21 is exhausting, the outlet of the first connecting hole 24 is at least partially connected to the first exhaust port 21. In this embodiment, the outlet of the first connecting hole 24 can at least partially be in continuous communication with the first exhaust port 21, ensuring that part of the exhaust gas flow flows out of the first exhaust port 21 through the first connecting hole 24, reducing the intrusion area of ​​the first exhaust port 21 and increasing the effective exhaust flow cross-sectional area. The outlet of the first connecting hole 24 can at least partially be not in continuous communication with the first exhaust port 21. That is, when the movable disc 3 and the stator disc 2 are not compressing, the outlet of the first connecting hole 24 can be sealed with the base plate of the stator disc 2 to ensure the sealing effect of the compression chamber and prevent gas leakage.

[0033] In some embodiments, the inlet of the first connecting hole 24 is arranged on the side wall of the scroll 26, and an angle is formed between the center line of the first connecting hole 24 and the center line of the movable disk 3. In this technical solution, the inlet of the first connecting hole 24 is arranged on the side wall of the scroll 26, and an angle is formed between the center line of the first connecting hole 24 and the center line of the movable disk 3, that is, the first connecting hole 24 with an inclined angle is provided on the scroll 26, which can directly connect the compression chamber and the first exhaust port 21, thereby greatly reducing the area of ​​the head of the scroll 26 of the movable disk 3 invading the first exhaust port 21 of the static disk 2, increasing the effective exhaust flow cross-sectional area, reducing over-compression loss and energy consumption of high-speed operation of the compressor, reducing exhaust temperature, and improving the reliability of the overall operation of the compressor.

[0034] In some embodiments, the movable plate 3 includes a base plate 25. A second exhaust port 23 is provided on the side of the base plate 25 facing the compression chamber. The second exhaust port 23 is connected to the inlet of the first connecting hole 24. The second exhaust port 23 is located at the center of the base plate 25. In this technical solution, the second exhaust port 23 is provided on the side of the base plate 25 facing the compression chamber. The second exhaust port 23 is connected to the inlet of the first connecting hole 24. The high-pressure gas in the compression chamber is introduced into the first connecting hole 24 through the second exhaust port 23 and then discharged through the first exhaust port 21. This reduces the area of ​​the head of the scroll 26 of the movable plate 3 that intrudes into the first exhaust port 21 of the stator plate 2, thereby increasing the effective exhaust flow cross-sectional area.

[0035] In some embodiments, a second communication hole 22 is provided on the base plate 25 along its radial direction, and the second exhaust port 23 communicates with the first communication hole 24 through the second communication hole 22. In this technical solution, the second exhaust port 23 communicates with the first communication hole 24 through the second communication hole 22, reducing the strength of the through hole on the head of the scroll 26. The second exhaust port 23 does not penetrate the base plate 25, and the second communication hole 22 is arranged in the middle of the base plate 25, improving the manufacturability of the structure.

[0036] In some embodiments, the second connecting hole 22 passes through the substrate 25, and a seal 20 is provided at one end of the substrate 25 facing away from the second exhaust port 23. In this technical solution, the second connecting hole 22 passes through the substrate 25, and a seal 20 is provided at one end of the substrate 25 facing away from the second exhaust port 23, which facilitates the processing of the second connecting hole 22. The seal 20 ensures that the gas in the second connecting hole 22 flows into the first connecting hole 24, ensuring the exhaust effect. The opening of the first connecting hole 24 adopts a special-shaped hole, making full use of the head of the scroll 26. The first connecting hole 24 is a circular group of holes composed of one or more holes to improve the exhaust efficiency. The cross-section of the second connecting hole 22 is rectangular, and the seal 20 is rectangular. However, circular holes and other forms of radial connecting holes and plugs can also be provided according to actual needs to achieve the same purpose.

[0037] In some embodiments, the second exhaust port 23 includes a first section and a second section. The first section communicates with the compression chamber, and the second section's ends communicate with the first section and the second communicating hole 22, respectively. A valve is disposed within the second section, capable of opening or closing the outlet of the first section. In this technical solution, the valve disposed within the second section, capable of opening or closing the outlet of the first section, prevents exhaust backflow during low-pressure-ratio, high-flow operation of the compressor, thereby reducing under-compression losses in the compressor.

[0038] In some embodiments, the inner diameter of the second section is larger than the inner diameter of the first section, and the valve disc is provided with multiple through holes along the circumference of the second section, wherein the shortest distance between the through holes and the center of the valve disc is less than the inner diameter of the first section. In this technical solution, the valve disc is provided with multiple through holes along the circumference of the second section, and the shortest distance between the through holes and the center of the valve disc is less than the inner diameter of the first section. When the valve disc is in contact with the inner wall of the second section of the movable disc 3, the through holes can form a seal with the inner wall of the second section, thereby preventing gas in the first section 30 from flowing out of the second section or gas in the second section from flowing into the first section.

[0039] In some embodiments, the second section is provided with a fixing part and an elastic part, one end of the elastic part is connected to the valve plate, and the other end is connected to the fixing part, and the fixing part is an annular structure. In this technical solution, one end of the elastic part is connected to the valve plate, and the other end is connected to the fixing part, and the fixing part is an annular structure. When the second exhaust port 23 is exhausted, high-pressure gas flows out from the first section, so that the high-pressure gas pushes the valve plate to compress the elastic part, so that the gas can flow into the second section through the through hole. When the exhaust is completed, the valve plate is attached to the inner wall of the second section under the action of the rebound force of the elastic part, preventing the gas in the first section from flowing out of the second section, or the gas in the second section from flowing into the first section, thereby ensuring the sealing of the compression chamber, thereby avoiding exhaust backflow of the compressor under low pressure ratio and high flow conditions, reducing the under-compression loss of the compressor, and improving the compression effect.

[0040] The present invention also provides a compressor, which includes the exhaust structure of the compressor.

[0041] The above description is merely 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 principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A compressor exhaust structure, characterized in that: include: The invention comprises a static plate (2) and a dynamic plate (3), wherein a compression chamber is formed between the dynamic plate (3) and the static plate (2), a first exhaust port (21) is provided on the static plate (2), and a first connecting hole (24) is provided on the dynamic plate (3), wherein the first exhaust port (21) and the first connecting hole (24) are respectively connected to the compression chamber, and an outlet of the first connecting hole (24) is at least partially connected to the first exhaust port (21); The movable disk (3) includes a scroll (26), and the first communicating hole (24) is provided on the scroll (26) along the axial direction of the first exhaust port (21). When the first exhaust port (21) is exhausting, the outlet of the first communicating hole (24) is at least partially connected to the first exhaust port (21); The inlet of the first communicating hole (24) is arranged on the side wall of the scroll (26), and an angle exists between the center line of the first communicating hole (24) and the center line of the moving disk (3).

2. The exhaust structure of the compressor according to claim 1, characterized in that: The movable plate (3) comprises a base plate (25), and a second exhaust port (23) is provided on a side of the base plate (25) facing the compression chamber. The second exhaust port (23) is connected to the inlet of the first connecting hole (24), and the second exhaust port (23) is located at the center of the base plate (25).

3. The exhaust structure of the compressor according to claim 2, characterized in that: A second communication hole (22) is provided on the substrate (25) along the radial direction of the substrate (25), and the second exhaust port (23) is connected to the first communication hole (24) through the second communication hole (22).

4. The exhaust structure of the compressor according to claim 3, characterized in that: The second communication hole (22) passes through the substrate (25), and a sealing member (20) is provided at one end of the substrate (25) facing away from the second exhaust port (23).

5. The exhaust structure of the compressor according to claim 3, characterized in that: The second exhaust port (23) comprises a first section and a second section, the first section being connected to the compression chamber, and both ends of the second section being connected to the first section and the second connecting hole (22) respectively, and a valve plate is provided in the second section, and the valve plate can open or close the outlet of the first section.

6. The exhaust structure of the compressor according to claim 5, characterized in that: The inner diameter of the second section is larger than that of the first section. A plurality of through holes are provided on the valve plate along the circumference of the second section, and the shortest distance between the through holes and the center of the valve plate is smaller than the inner diameter of the first section.

7. The exhaust structure of the compressor according to claim 5, characterized in that: The second section is provided with a fixing member and an elastic member. One end of the elastic member is connected to the valve plate, and the other end is connected to the fixing member. The fixing member is an annular structure.

8. A compressor, comprising an exhaust structure of the compressor, characterized in that: The exhaust structure of the compressor is the exhaust structure of the compressor according to any one of claims 1 to 7.

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