Compressor back pressure adjusting structure and compressor

Abstract

The application provides a compressor back pressure adjusting structure and a compressor. The compressor back pressure adjusting structure comprises a support for supporting a compression assembly of the compressor; a main body arranged on the support, wherein a gas flow discharged by the compression assembly can at least partially flow between the main body and the support and push the support to rotate; and a plurality of first channels with different flow areas are arranged on the main body, wherein the first channels have first ends and second ends, the first ends are open towards the compression assembly, and the second ends are arranged on the outer wall of the main body, and the gas flow between the main body and the support flows into one of the first channels through the second end and is discharged from the first end. According to the application, the defect that the back pressure of the compressor cannot be adjusted in the prior art, which leads to poor stability of the compressor in operation, can be overcome, and the volumetric efficiency of the compressor can be effectively improved and the power consumption of the compressor can be reduced.

Description

Technical Field

[0001] This invention belongs to the field of compressor technology, specifically relating to a compressor back pressure adjustment structure and a compressor. Background Technology

[0002] When a scroll compressor is running, the suction and discharge pressure ratio is relatively small, and the pressure difference is large. The pump body generates a large axial force when compressing the refrigerant, which pushes the moving and stationary discs of the pump body apart, causing gas leakage and reducing the volumetric efficiency of the compressor. Since the stationary disc is not floating, back pressure is needed to push the moving disc towards the stationary disc to make it fit as closely as possible. Different back pressures have different effects on the stable operation of the pump body. If the back pressure is too small, it will not work, and gas will still leak in the pump body and be repeatedly compressed inside the pump body. If the back pressure is too large, the compressor will generate greater power consumption and will also cause irreversible wear on the moving and stationary discs.

[0003] Because existing technologies cannot regulate the back pressure of the compressor, resulting in poor stability of scroll compressor operation and severe wear of the moving and stationary discs, this invention studies and designs a compressor back pressure regulation structure and a compressor. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the prior art that the back pressure of the compressor cannot be regulated, resulting in poor stability of compressor operation, thereby providing a compressor back pressure regulation structure and a compressor.

[0005] To address the above problems, the present invention provides a compressor back pressure regulating structure, including...

[0006] A bracket for supporting the compression assembly of the compressor;

[0007] The main body is mounted on the support, and at least a portion of the airflow discharged by the compression assembly flows between the main body and the support, thereby driving the support to rotate.

[0008] The main body is provided with multiple first channels with different flow areas. Each first channel has a first end and a second end. The first end opens toward the compression component, and the second end is disposed on the outer wall of the main body. Airflow between the main body and the support flows into one of the first channels through the second end and exits from the first end.

[0009] In some embodiments, one end of the main body is provided with four first grooves, and a first fixing member, a second fixing member, a third fixing member and a fourth fixing member are respectively provided in the four first grooves. Each of the first fixing member, the second fixing member and the first groove, the third fixing member and the first groove, and the fourth fixing member and the first groove form a first channel.

[0010] In some embodiments, the first channel is arranged in a spiral shape, and a plurality of first inlets are provided on the outer peripheral wall of the main body. The plurality of first inlets correspond one-to-one with a plurality of second ends, and the first inlets are connected to the second ends. Airflow flows into the first channel through the first inlets.

[0011] In some embodiments, a fan blade is provided at the other end of the main body, and the airflow between the main body and the support drives the main body to rotate through the fan blade. A fourth groove is provided at one end of the support facing the compression assembly, and the main body is located in the fourth groove.

[0012] In some embodiments, a first cavity is formed between the support and the compression assembly, and a second inlet is provided on the support. The first cavity and the fourth groove are connected through the second inlet, and the airflow discharged from the second end can flow into the first cavity through the second inlet.

[0013] In some embodiments, the bracket has a third cavity on the side opposite to the compression assembly, and the bracket is also provided with a mounting hole. The third cavity is connected to the first cavity through the mounting hole. The main body is provided with a boss, and an elastic element is provided on the boss. One end of the elastic element is connected to the elastic element, and the other end is connected to the inner wall of the fourth groove. A sealing element is provided between the outer peripheral wall of the main body and the fourth groove.

[0014] In some embodiments, a fifth fixing member is provided in the mounting hole, the fifth fixing member is provided with a fifth groove, a fourth channel is formed between the fifth groove and the mounting hole, the bracket is provided with a third inlet, the first cavity is connected to the mounting hole through the third inlet, and the air in the first cavity can enter the mounting hole through the third inlet and then flow into the third cavity through the fourth channel.

[0015] In some embodiments, the compressor back pressure regulating structure further includes a cover body disposed on the compression assembly, a second cavity enclosing the cover body and the compression assembly, the compression assembly having an outlet, the compression assembly discharging airflow into the second cavity through the outlet, the cover body also having a third channel, and the fourth groove communicating with the second cavity through the third channel.

[0016] In some embodiments, when multiple first inlets are provided on the outer peripheral wall of the main body, a second groove is provided on the inner side wall of the bracket, the second groove being able to communicate with the first inlets, and a second channel is provided on the bracket, one end of the second channel being connected to the third channel, and the other end being opened on the inner wall of the second groove.

[0017] The present invention also provides a compressor, including the compressor back pressure regulating structure described in any of the preceding claims.

[0018] The compressor back pressure regulating structure and compressor provided by this invention have the following beneficial effects:

[0019] The compressor utilizes multiple first channels with varying flow areas to achieve different throttling effects. The airflow discharged from the compression assembly flows between the main body and the support, causing the support to rotate. Under different operating conditions, the airflow pressure discharged by the compressor varies, resulting in different rotation angles of the main body. This allows different exhaust pressures to enter the first channels with corresponding throttling effects. The airflow discharged from the first end flows into the back pressure chamber, thus obtaining different back pressures. Regardless of the compressor's operating conditions or pressure changes, different adaptive back pressures can be generated through the first channels, maintaining the back pressure within a suitable range. This reduces the compressor's power consumption, meets the requirements for stable pump operation, and enables the compressor to operate stably under various conditions, thereby improving the compression efficiency and volumetric efficiency of the scroll compressor. Attached Figure Description

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0021] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0022] Figure 1 This is a perspective view of the compressor back pressure adjustment structure according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the compressor back pressure adjustment structure according to an embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of the compressor back pressure adjustment structure according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the elastic element in the compressor back pressure adjustment structure according to an embodiment of the present invention;

[0026] Figure 5 This is a cross-sectional view of the bracket in the compressor back pressure adjustment structure according to an embodiment of the present invention;

[0027] Figure 6 This is a cross-sectional view of the compressor back pressure adjustment structure according to an embodiment of the present invention, when the main body is mounted on the bracket;

[0028] Figure 7 This is a flow diagram of the airflow direction in the compressor back pressure regulating structure according to an embodiment of the present invention.

[0029] The reference numerals in the attached figures are as follows:

[0030] 1. Main body; 2. Fan blade; 3. Sealing element; 4. Boss; 5. First fixing element; 6. Second fixing element; 7. Third fixing element; 8. Fourth fixing element; 9. First channel; 10. First inlet; 11. Elastic element; 12. Second channel; 13. Second groove; 14. Second inlet; 15. First cavity; 16. Third inlet; 17. Mounting hole; 18. Bracket; 19. Fifth fixing element; 20. Outlet; 21. Second cavity; 22. Third channel; 23. Third cavity; 24. Central column. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0034] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0035] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0036] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0037] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0038] See also Figures 1 to 7As shown, according to an embodiment of the present invention, a compressor back pressure adjustment structure is provided, including a bracket 18 for supporting the compression assembly of the compressor; a main body 1 disposed on the bracket 18, wherein at least a portion of the airflow discharged from the compression assembly can flow between the main body 1 and the bracket 18, and push the bracket 18 to rotate; the main body 1 is provided with a plurality of first channels 9 with different flow areas, each first channel 9 having a first end and a second end, the first end opening towards the compression assembly, and the second end disposed on the outer wall of the main body 1, wherein the airflow between the main body 1 and the bracket 18 flows into one of the first channels 9 through the second end and is discharged from the first end. In this technical solution, multiple first channels 9 with different flow areas are used to achieve different throttling effects. The airflow discharged from the compression assembly flows between the main body 1 and the support 18, and pushes the support 18 to rotate. Under different operating conditions, the airflow pressure discharged by the compressor is different. Therefore, the rotation angle of the main body 1 is different, so that different exhaust pressures can enter the first channel 9 with corresponding throttling effects. The airflow discharged from the first end flows into the back pressure chamber, thereby obtaining different back pressures. No matter what operating condition the compressor is in or how the pressure changes, different adaptive back pressures can be generated through the first channel 9 to maintain the back pressure within a suitable range, reduce the power consumption of the compressor, meet the requirements for stable operation of the pump body, and enable the compressor to operate stably under various conditions, thereby improving the compression efficiency and volumetric efficiency of the scroll compressor.

[0039] In some implementations, see reference Figure 1 and Figure 2 As shown, one end of the main body 1 is provided with four first grooves. A first fixing member 5, a second fixing member 6, a third fixing member 7, and a fourth fixing member 8 are respectively disposed in the four first grooves. Each of the first fixing member 5, second fixing member 6, third fixing member 7, and fourth fixing member 8 has a third groove. A first channel 9 is formed between the first fixing member 5 and the first groove, between the second fixing member 6 and the first groove, and between the third fixing member 7 and the fourth fixing member 8 and the first groove. In this technical solution, preferably, there are four first channels 9. Of course, other numbers of first channels 9 are also possible, as long as the flow rate of the multiple first channels 9 is different to meet different throttling effects. Different throttling effects can be achieved by setting different groove widths for the third grooves. After the airflow discharged from the compression component flows between the main body 1 and the bracket 18, it selects to enter any one of the first channels 9 between the first fixing member 5 and the first groove, between the second fixing member 6 and the first groove, between the third fixing member 7 and the first groove, or between the fourth fixing member 8 and the first groove, depending on the pressure, and then exits from the first end, thereby adjusting different back pressures.

[0040] In some implementations, see reference Figure 3 As shown, the first channel 9 is arranged in a spiral shape. Multiple first inlets 10 are provided on the outer peripheral wall of the main body 1. Each of the multiple first inlets 10 corresponds one-to-one with a multiple second ends, and the first inlets 10 are connected to the second ends. Airflow flows into the first channel 9 through the first inlets 10. In this technical solution, the spiral arrangement of the first channel 9 increases the flow path of the airflow in the first channel 9, improving the throttling effect. The first inlets 10 are located on the outer peripheral wall of the main body 1 and are evenly distributed along the circumference of the main body 1. When the main body 1 stops rotating, the airflow can only enter one first channel 9 through one first inlet 10. The first channel 9 at this time is the suitable first channel 9 for the current exhaust pressure. The first grooves are evenly distributed on the end face of the main body 1. (See also...) Figure 3 As described, when four first grooves are formed on the main body 1, a central column 24 is formed in the middle of the main body 1. The four first grooves are evenly distributed along the axial direction of the central column 24. Preferably, the first fixing member 5, the second fixing member 6, the third fixing member 7, and the fourth fixing member 8 are spiral throttling pins, that is, a third groove is formed on the outer peripheral wall of the throttling pin, and the third groove is spirally arranged along the axial direction of the throttling pin. (See also...) Figure 2 In practice, the first fixing member 5 has the largest spiral channel and the weakest throttling capacity, the second fixing member 6 has the third smallest spiral channel and the weakest throttling capacity, the third fixing member 7 has the second smallest spiral channel and the strongest throttling capacity, and the fourth fixing member 8 has the smallest spiral channel and the strongest throttling capacity.

[0041] In some embodiments, a fan blade 2 is provided at the other end of the main body 1. Airflow between the main body 1 and the support 18 passes through the fan blade 2, driving the main body 1 to rotate. A fourth groove is provided at the end of the support 18 facing the compression assembly, and the main body 1 is located in the fourth groove. In this technical solution, preferably, the inner area of ​​the fan blade 2 is larger than the outer area, and the exhaust pressure of the compressor can drive the main body 1 to rotate clockwise, thereby providing power for the rotation of the main body 1. In this application, a fixing member can also be provided on the bottom surface of the fourth groove, and the main body 1 is mounted on the fixing member, so that the main body 1 can rotate around its central axis, avoiding friction between the fan blade 2 and the bottom surface of the fourth groove, which would affect the rotation of the main body 1.

[0042] In some embodiments, a first cavity 15 is formed between the support 18 and the compression assembly. A second inlet 14 is provided on the support 18. The first cavity 15 and the fourth groove are connected via the second inlet 14, allowing the airflow discharged from the second end to flow into the first cavity 15 through the second inlet 14. In this technical solution, the first cavity 15 is a back pressure chamber. When the scroll compressor starts running, compressed gas flows from the outlet 20... The gas flows through the second cavity 21, then through the third oil-gas channel 22 of the front cover, and into the second oil-gas channel 12 of the bracket. Reaching the main body 1, the pressure discharge begins to act on the fan blades 2 at the bottom of the central column 24. Because the inner surface of the fan blades is larger than the outer surface, the pressure discharge can push the main body 1 to rotate clockwise. The ring spring 11 acting on the boss 4 can limit the rotation angle of the sleeve. When the compressor stops, the ring spring also acts as a reset mechanism. By opening a second groove 13 on the bracket, the oil and gas can only connect to one suitable inlet 10 of the main body 1 at any given time. Starting from the boss 4, the spiral throttling pin is installed clockwise into the main body 1 according to the throttling capacity, from weak to strong. The oil and gas pass through the spiral throttling pin. After the passage is completed, the pressure is throttled to form a back pressure suitable for the current operating conditions. The back pressure enters the first cavity 15 through the second back pressure inlet 14. The optimal back pressure obtained by the back pressure regulating component can make the moving and stationary plates fit as closely as possible, reduce gas leakage between the pump bodies, improve the volumetric efficiency of the compressor, and reduce the power consumption of the compression connection. Finally, the back pressure in the first cavity 15 can enter the fifth pressure relief fixing part 19 through the back pressure chamber third back pressure inlet 16 and be released out into the third cavity 23. Thus, a complete closed circulation oil and gas passage is formed. The oil and gas passage of the second cavity 21, the first cavity 15, and the third cavity 23 can transport the refrigeration oil to the bearings and low-pressure side parts for lubrication and cooling, thereby improving the life and reliability of the compressor.

[0043] In some embodiments, the bracket 18 has a third cavity 23 on the side facing away from the compression assembly. The bracket 18 also has a mounting hole 17. The third cavity 23 communicates with the first cavity 15 through the mounting hole 17. The main body 1 has a boss 4, and an elastic element 11 is provided on the boss 4. One end of the elastic element 11 is connected to the elastic element 11, and the other end is connected to the inner wall of the fourth groove. A sealing element 3 is provided between the outer peripheral wall of the main body 1 and the fourth groove. In this technical solution, the third cavity 23 is a suction chamber, i.e., a suction chamber, the chamber between the lower end of the bracket 18 and the compressor housing. The airflow discharged from the back pressure chamber flows into the third cavity 23 through the mounting hole 17, mixes with the airflow in the third cavity 23, and transports the refrigerant oil in the third cavity 23 to the bearings and low-pressure side components for lubrication and cooling, improving the compressor's lifespan and reliability. In this application, the boss 4 is preferably located near the end of the main body 1 facing the compression assembly. (See also...) Figure 4 As shown, the elastic element 11 is a ring spring. When the main body 1 rotates, the boss 4 cooperates with the elastic element 11 to limit the rotation angle of the main body 1. When the compressor stops working, it resets the main body 1. The sealing element 3 can be a sealing ring. Preferably, the airflow discharged from the compression assembly enters the fourth groove through the bottom of the fourth groove. The first inlet 10 is also located near the bottom of the fourth groove. The sealing element 3 is located between the first inlet 10 and the compression assembly. Through the sealing element 3, the airflow at the bottom of the fourth groove is prevented from leaking through the gap between the main body and the inner wall of the fourth groove, so that all the airflow flows into the first channel 9. Preferably, grooves can also be provided opposite to each other on the inner side wall of the fourth groove and the outer peripheral wall of the main body 1. The sealing element 3 is located in the two grooves, that is, the outer part of the sealing element 3 is located in the groove of the inner side wall of the fourth groove, and the inner part of the sealing element 3 is located in the groove of the outer peripheral wall of the main body 1. The sealing element 3 can rotate in the groove of the inner side wall of the fourth groove, thereby providing axial limiting for the main body 1.

[0044] In some implementations, see reference Figure 6As shown, a fifth fixing member 19 is provided in the mounting hole 17, and a fifth groove is provided on the fifth fixing member 19. A fourth channel is formed between the fifth groove and the mounting hole 17. A third inlet 16 is provided on the bracket 18. The first cavity 15 and the mounting hole 17 are connected through the third inlet 16. The air in the first cavity 15 can enter the mounting hole 17 through the third inlet 16, and then flow into the third cavity 23 through the fourth channel. In this technical solution, the fourth channel is arranged in a spiral shape, which further increases the airflow process, thereby throttling the airflow flowing out of the first cavity 15. Preferably, the mounting hole 17 can be divided into two parts, with the diameter of the mounting hole near the compression assembly being larger than the diameter of the mounting hole near the third cavity 23. This facilitates the installation of the fifth fixing member 19. The fifth fixing member 19 uses a spiral throttling pin, which, through the fourth channel, reduces the airflow pressure exiting the first cavity 15. When the airflow enters the third cavity 23, it will not affect the pressure in the third cavity 23, thus ensuring the normal intake and oil supply of the compressor. When the compressor starts operating under ultra-high operating conditions, the required back pressure should be greater; otherwise, gas leakage will occur in the pump body, resulting in repeated compression within the pump body. As the compressor operates under extremely high pressure, the discharge pressure increases, leading to a larger rotation angle of the main body 1. At this angle, the spiral throttling channel of the connecting spiral throttling pin becomes larger, resulting in a weaker throttling capacity and ultimately a larger back pressure. Simultaneously, the pressure in the first cavity 15 enters the fourth channel between the fifth fixing member 19 and the mounting hole 17 through the third inlet 16 of the back pressure chamber, and then flows into the third cavity 23 after pressure relief, causing the back pressure to stabilize. In this application, the spiral throttling pin can be replaced with other throttling mechanisms to achieve the same effect.

[0045] In some implementations, see reference Figure 7 As shown, the compressor back pressure regulating structure also includes a cover, which is disposed on the compression assembly. A second cavity 21 is enclosed between the cover and the compression assembly. The compression assembly has an outlet 20, through which airflow is discharged into the second cavity 21. A third channel 22 is also provided on the cover, and the fourth groove communicates with the second cavity 21 through the third channel 22. In this technical solution, an exhaust port is also provided on the cover, and the third channel 22 is also connected to the exhaust port. Through the third channel 22, part of the high-pressure airflow discharged from the compression assembly is discharged outside the compressor through the exhaust port, and the other part is discharged into the fourth groove.

[0046] This invention designs a back pressure regulating structure that can be installed on a compressor bracket, taking into account the characteristics of the refrigerant and the structural features of the scroll compressor. It utilizes the pressure discharge to drive the main body 1 to rotate. Under different operating conditions, the rotation angle of the main body 1 connects to different first channels 9, throttling the discharge pressure to obtain different back pressures. Furthermore, the compressor has a closed-loop oil-gas passage, allowing the refrigerant oil to quickly and timely lubricate and cool relevant components, effectively improving the compressor's volumetric efficiency and reducing power consumption. This improves the stable operation of the scroll compressor and increases its volumetric efficiency. When the compressor operates under different conditions, the rotation of the main body 1 connects to different first channels 9, generating different back pressures. Pressure is then released through the fourth channel, maintaining the back pressure within a suitable range and reducing power consumption. The refrigerant oil can flow through the second cavity 21 to the first cavity 15 and then through the fourth channel to the third cavity 23. Along these paths, the refrigerant oil lubricates and cools bearings, motors, and other components, improving the compressor's lifespan and reliability.

[0047] In some implementations, see reference Figure 5 As shown, when multiple first inlets 10 are provided on the outer peripheral wall of the main body 1, a second groove 13 is provided on the inner side wall of the bracket 18. The second groove 13 can communicate with the first inlets 10. A second channel 12 is provided on the bracket 18. One end of the second channel 12 is connected to the third channel 22, and the other end is opened on the inner wall of the second groove 13. In this technical solution, the present invention can also be used to improve the volumetric efficiency of the compressor and reduce the power consumption of the compressor. Based on the refrigerant characteristics and the structural characteristics of the scroll compressor, the space of the scroll compressor bracket is effectively utilized. When the pump operates, the compressed gas is discharged through the opening of the stationary plate into the second cavity 21, and then flows through the second channel 12 and the third channel 22 to the main body 1 of the support 18. The pressure discharge acts on the fan blade 2 of the main body 1. Since the inner area of ​​the fan blade 2 in contact with the pressure discharge is larger than the outer area, the pressure discharge can push the main body 1 to rotate clockwise. In the main body 1, there are multiple first flow paths 9 with different flow rates. Starting from the boss 4 and counting clockwise, the throttling capacity of the first flow path 9 is continuously enhanced. Within a certain angle range, the second groove 13 can only connect to one air inlet 10 on the main body 1. The rotation angle of the main body 1 can connect different first flow paths 9 to obtain different throttling channels to obtain the appropriate back pressure. At the same time, a sealing ring is used on the main body 1 to seal and separate the first cavity 15 and the second cavity 21. A ring spring is used to act on the boss 4 to reset and limit the main body 1. Finally, the back pressure is released through the fourth channel on the support 18 to the third cavity 23, thus forming a closed-loop oil and gas passage. The oil-gas passage connecting the first cavity 15, the second cavity 21, and the third cavity 23 can transport refrigeration oil to the bearings and low-pressure side components for lubrication and cooling, thereby improving the compressor's lifespan and reliability.

[0048] The present invention also provides a compressor, including the compressor back pressure regulating structure described in any of the preceding claims.

[0049] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A compressor back pressure regulating structure, characterized in that, include A bracket (18) for supporting the compression assembly of the compressor; The main body (1) is disposed on the support (18), and the airflow discharged by the compression assembly can at least partially flow between the main body (1) and the support (18) and push the support (18) to rotate; The main body (1) is provided with a plurality of first channels (9) with different flow areas. Each first channel (9) has a first end and a second end. The first end opens toward the compression assembly, and the second end is disposed on the outer wall of the main body (1). Airflow between the main body (1) and the support (18) flows into one of the first channels (9) through the second end and is discharged from the first end. The main body (1) has four first grooves at one end and a fan blade (2) at the other end. The airflow between the main body (1) and the support (18) drives the main body (1) to rotate through the fan blade (2). The support (18) has a fourth groove at one end facing the compression component, and the main body (1) is located in the fourth groove. The main body (1) has a boss (4) on it, and an elastic element (11) on the boss (4). One end of the elastic element (11) is connected to the elastic element (11), and the other end is connected to the inner wall of the fourth groove. The support (18) has a second groove (13) on its inner side wall, and the second groove (13) can communicate with the first inlet (10).

2. The compressor back pressure regulating structure according to claim 1, characterized in that, A first fixing member (5), a second fixing member (6), a third fixing member (7), and a fourth fixing member (8) are respectively provided in the four first grooves. A third groove is provided on each of the first fixing member (5), the second fixing member (6), the third fixing member (7), and the fourth fixing member (8). A first channel (9) is formed between the first fixing member (5) and the first groove, between the second fixing member (6) and the first groove, between the third fixing member (7) and the first groove, and between the fourth fixing member (8) and the first groove.

3. The compressor back pressure regulating structure according to claim 1, characterized in that, The first channel (9) is arranged in a spiral shape. Multiple first inlets (10) are provided on the outer peripheral wall of the main body (1). The multiple first inlets (10) correspond one-to-one with multiple second ends. The first inlets (10) are connected to the second ends. Airflow flows into the first channel (9) through the first inlets (10).

4. The compressor back pressure regulating structure according to claim 1, characterized in that, A first cavity (15) is formed between the bracket (18) and the compression assembly. A second inlet (14) is provided on the bracket (18). The first cavity (15) and the fourth groove are connected through the second inlet (14). The airflow discharged from the second end can flow into the first cavity (15) through the second inlet (14).

5. The compressor back pressure regulating structure according to claim 4, characterized in that, The bracket (18) has a third cavity (23) on the side facing away from the compression assembly. The bracket (18) is also provided with a mounting hole (17). The third cavity (23) is connected to the first cavity (15) through the mounting hole (17). A sealing element (3) is provided between the outer peripheral wall of the main body (1) and the fourth groove.

6. The compressor back pressure regulating structure according to claim 5, characterized in that, A fifth fixing member (19) is provided in the mounting hole (17). A fifth groove is provided on the fifth fixing member (19). A fourth channel is formed between the fifth groove and the mounting hole (17). A third inlet (16) is provided on the bracket (18). The first cavity (15) and the mounting hole (17) are connected through the third inlet (16). The air in the first cavity (15) can enter the mounting hole (17) through the third inlet (16) and then flow into the third cavity (23) through the fourth channel.

7. The compressor back pressure regulating structure according to claim 5, characterized in that, The compressor back pressure adjustment structure also includes a cover, which is disposed on the compression assembly. A second cavity (21) is enclosed between the cover and the compression assembly. The compression assembly has an outlet (20). The compression assembly discharges airflow into the second cavity (21) through the outlet (20). A third channel (22) is also provided on the cover. The fourth groove is connected to the second cavity (21) through the third channel (22).

8. The compressor back pressure regulating structure according to claim 7, characterized in that, When the outer peripheral wall of the main body (1) is provided with a plurality of first inlets (10), the bracket (18) is provided with a second channel (12), one end of the second channel (12) is connected to the third channel (22), and the other end is opened on the inner wall of the second groove (13).

9. A compressor, characterized in that, The compressor back pressure regulating structure includes any one of claims 1 to 8.

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