Scroll compressor

Abstract

The utility model belongs to the technical field of compressors, and discloses a scroll compressor which comprises a shell, a silencing cover, a static scroll plate and a floating sealing assembly, the outer edge of the silencing cover is fixed to the inner circumferential wall of the shell in a sealing mode in the circumferential direction, and an inner cavity of the shell is divided into a high-pressure cavity and a low-pressure cavity; the floating sealing assembly is arranged between the static vortex plate and the silencing cover; the static vortex plate is fixedly arranged in the low-pressure cavity; a back pressure cavity and a first flow channel are formed in the floating sealing assembly, and a compression output port of the static vortex plate is communicated with the back pressure cavity through the first flow channel; the floating sealing assembly comprises a floating sealing ring, and fluid flowing into the backpressure cavity can drive the floating sealing ring to abut against the silencing cover in the axial direction so that the floating sealing assembly can make the compression output port and the first communicating hole of the silencing cover communicate in a sealed mode, and the compression output port can communicate with the high-pressure cavity. The scroll compressor is good in working performance, low in design difficulty, low in machining difficulty and convenient to assemble.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to scroll compressors. Background Technology

[0002] A scroll compressor consists of a housing, a silencer cover, a scroll compression assembly, and a sealing structure. A high-pressure chamber is formed between the silencer cover and the housing on the side furthest from the scroll compression assembly, while a low-pressure chamber is formed between the silencer cover and the housing on the side closer to the scroll compression assembly. The sealing structure is located between the stationary scroll and the silencer cover to ensure that the high-pressure fluid generated during compression within the scroll compression chamber can flow smoothly to the high-pressure chamber. The sealing structure is classified into static sealing structures and floating sealing structures according to the installation method of the stationary scroll. A static sealing structure is typically used when the stationary scroll is fixed inside the housing, while a floating sealing structure is used when the stationary scroll floats inside the housing.

[0003] For the floating seal structure between the stationary scroll and the muffler cover, existing technologies typically create a back pressure chamber between the top surface of the stationary scroll along the axial direction and the bottom surface of the floating seal structure along the axial direction. A channel is provided on the stationary scroll to connect the back pressure chamber and the intermediate pressure zone of the scroll compression chamber. When the scroll compressor is in compression mode, the fluid flowing into the back pressure chamber drives the floating seal structure to press against the muffler cover axially to achieve a floating seal. However, this floating seal method requires sufficient space to be reserved on the stationary scroll to correspond to the intermediate pressure zone of the scroll compression chamber, so that a channel connecting the back pressure chamber and the intermediate pressure zone of the scroll compression chamber can be provided on the stationary scroll. This results in limited space for the exhaust port on the stationary scroll. Secondly, the response speed and reliability of the floating seal structure sealing the stationary scroll and the muffler cover still need to be improved. Utility Model Content

[0004] The purpose of this invention is to provide a scroll compressor to solve the aforementioned problems existing in the scroll compressors of the prior art.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A scroll compressor includes a housing, a silencer cover, a stationary scroll, and a floating seal assembly. The outer edge of the silencer cover is circumferentially sealed and fixed to the inner peripheral wall of the housing, dividing the inner cavity of the housing into a high-pressure chamber and a low-pressure chamber. The floating seal assembly is disposed between the stationary scroll and the silencer cover.

[0007] The stationary vortex disk is fixedly disposed inside the low-pressure chamber;

[0008] The floating sealing assembly has a back pressure chamber and a first flow channel. The compression output port of the stationary vortex disk is connected to the back pressure chamber through the first flow channel. The floating sealing assembly includes a floating sealing ring. The fluid flowing into the back pressure chamber can drive the floating sealing ring to press against the muffler cover axially, so that the floating sealing assembly seals the compression output port with the first connecting hole of the muffler cover, thereby connecting the compression output port with the high pressure chamber.

[0009] As a preferred embodiment of the above-mentioned scroll compressor, the floating seal assembly further includes a sealing transition ring that is sealed to the stationary scroll, the back pressure chamber is formed between the sealing transition ring and the floating seal ring, and the back pressure chamber and the low pressure chamber are isolated from each other; the sealing transition ring and the floating seal ring also form a second flow channel, and the compression output port is connected to the first connecting hole through the second flow channel;

[0010] The first flow channel is disposed on the sealing transition ring, and / or, the first flow channel is disposed on the floating sealing ring, and / or, the first flow channel is the fitting gap between the sealing transition ring and the floating sealing ring at the inner circumference of the back pressure cavity; one end of the first flow channel is connected to the second flow channel, and the other end of the first flow channel is connected to the back pressure cavity.

[0011] As a preferred embodiment of the above-mentioned scroll compressor, the floating seal assembly further includes a sealing transition ring that is sealed to the stationary scroll, the back pressure chamber is formed between the sealing transition ring and the floating seal ring, and the back pressure chamber and the low pressure chamber are isolated from each other;

[0012] The first flow channel is disposed on the sealing adapter ring, one end of the first flow channel is connected to the compression output port, and the other end of the first flow channel is connected to the back pressure chamber.

[0013] As a preferred embodiment of the aforementioned scroll compressor, the extension direction of the first flow channel is parallel to the axial direction of the sealing transition ring; and / or, the maximum flow cross-sectional area of ​​the first flow channel is smaller than the minimum flow cross-sectional area of ​​the compression output port.

[0014] As a preferred embodiment of the aforementioned scroll compressor, at least one of the adjacent end faces of the sealing transition ring and the floating sealing ring is recessed with a groove, and the recessed end face is closed by the other end face of the sealing transition ring and the floating sealing ring to form the back pressure chamber.

[0015] As a preferred embodiment of the above-mentioned scroll compressor, the scroll compressor further includes a first sealing ring, which is disposed between the sealing transition ring and the floating sealing ring, and is used to isolate the back pressure chamber and the low pressure chamber from each other.

[0016] As a preferred embodiment of the aforementioned scroll compressor, the sealing transition ring is integrally formed into the stationary scroll; or...

[0017] The sealing adapter ring and the stationary vortex disk are formed separately, and the sealing adapter ring is sealed and fixedly connected to the stationary vortex disk.

[0018] As a preferred embodiment of the above-mentioned scroll compressor, the sealing transition ring and the stationary scroll are formed separately. The scroll compressor also includes a second sealing ring, which is located on the outer periphery of the compression output port and sandwiched between the sealing transition ring and the stationary scroll.

[0019] As a preferred embodiment of the above-mentioned scroll compressor, the scroll compressor further includes an elastic sealing structure, which includes an elastic element and a third sealing ring. A first limiting groove is recessed in one of the ends of the floating sealing ring and the silencer cover that are close to each other. One end of the elastic element is disposed in the first limiting groove, and the third sealing ring is disposed at the other end of the elastic element.

[0020] The third sealing ring is radially elastically pressed against the inner circumferential wall of the first limiting groove, and axially elastically pressed against the other end of the floating sealing ring and the silencer cover that are close to each other.

[0021] As a preferred embodiment of the above-mentioned scroll compressor, the scroll compressor further includes a bearing housing fixedly disposed in the low-pressure chamber, and the stationary scroll is fixedly connected to one end of the bearing housing near the muffler cover.

[0022] The beneficial effects of this utility model are:

[0023] This utility model provides a scroll compressor, which includes a housing, a silencer cover, a stationary scroll, and a floating sealing assembly. The outer edge of the silencer cover is circumferentially sealed and fixed to the inner circumferential wall of the housing, dividing the housing cavity into a high-pressure chamber and a low-pressure chamber. The floating sealing assembly is disposed between the stationary scroll and the silencer cover. The stationary scroll is fixedly disposed within the low-pressure chamber. The floating sealing assembly forms a back pressure chamber and a first flow channel. The compression output port of the stationary scroll communicates with the back pressure chamber through the first flow channel. The floating sealing assembly includes a floating sealing ring. Fluid flowing into the back pressure chamber drives the floating sealing ring to axially press against the silencer cover, thereby sealing the compression output port with the first connecting hole of the silencer cover, thus connecting the compression output port with the high-pressure chamber.

[0024] When the scroll compressor is in compression operation, the high-pressure fluid output from the compression output port of the stationary scroll is divided into a first part and a second part. The first part of the high-pressure fluid flows into the high-pressure chamber through the floating sealing assembly and the first connecting hole, while the second part of the high-pressure fluid flows into the back pressure chamber through the first flow channel. The high-pressure fluid flowing into the back pressure chamber pushes the floating sealing ring to move axially, causing the floating sealing ring to press against the muffler cover and seal the gap between it and the muffler cover, thereby enabling the first part of the high-pressure fluid to flow stably into the high-pressure chamber.

[0025] In particular, since the fluid delivered to the back pressure chamber is a high-pressure fluid, compared with the prior art, the force of the fluid flowing into the back pressure chamber pushing the floating sealing ring to press against the muffler cover along the axial direction is increased, which can effectively improve the reliability of the gap between the floating sealing ring and the muffler cover.

[0026] Secondly, since the fluid delivered to the back pressure chamber is a high-pressure fluid, compared with existing technologies, the scroll compressor can quickly and efficiently build up pressure in the early stage of startup, so that the floating sealing ring seals the gap between the sealing ring and the silencer cover, which can effectively prevent the disc from coming off.

[0027] Secondly, compared with the existing technology that opens a channel on the stationary volute to connect the back pressure chamber and the medium pressure zone of the compression chamber, this method can avoid setting a channel on the stationary volute, so that the stationary volute has enough space to set the compression output port, effectively reducing the design and processing difficulty of the stationary volute, and also helping to reduce the processing and assembly accuracy of the end of the stationary volute close to the muffler cover along the axial direction.

[0028] Therefore, this scroll compressor has good working performance, low design difficulty, low processing difficulty, and is easy to assemble. Attached Figure Description

[0029] Figure 1 This is a partial structural schematic diagram of a scroll compressor provided in a specific embodiment of this utility model;

[0030] Figure 2 yes Figure 1 A partial view;

[0031] Figure 3 This is a cross-sectional view of the sealing adapter ring provided in a specific embodiment of this utility model;

[0032] Figure 4 This is a cross-sectional view of the floating sealing ring provided in a specific embodiment of this utility model.

[0033] In the picture:

[0034] 1. Shell;

[0035] 2. Silencer cover;

[0036] 3. Static scroll plate; 31. Compression output port; 311. First output section; 312. Second output section;

[0037] 4. Floating sealing assembly; 41. Floating sealing ring; 411. Second groove; 412. First limiting groove; 413. Second limiting groove; 414. Third connecting hole; 42. Sealing adapter ring; 421. First groove; 422. Second connecting hole; 4221. First hole segment; 4222. Second hole segment; 423. First connecting hole;

[0038] 51. High-pressure chamber; 52. Low-pressure chamber;

[0039] 61. Back pressure chamber; 62. First flow channel; 63. Second flow channel;

[0040] 7. First sealing ring; 71. First annular sealing part; 72. Second annular sealing part;

[0041] 8. Second sealing ring;

[0042] 9. Elastic sealing structure; 91. Elastic element; 92. Third sealing ring; 921. Third annular sealing part; 922. Fourth annular sealing part;

[0043] 10. Moving scroll plate. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0045] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0048] Example 1

[0049] This invention provides a scroll compressor, which can compress either liquid or gas. The following description will focus on the case where the fluid compressed by the scroll compressor is gas.

[0050] like Figure 1-4 As shown, the scroll compressor includes a housing 1, a silencer cover 2, a stationary scroll 3, and a floating sealing assembly 4. The outer edge of the silencer cover 2 is circumferentially sealed and fixed to the inner circumferential wall of the housing 1, dividing the inner cavity of the housing 1 into a high-pressure chamber 51 and a low-pressure chamber 52. The floating sealing assembly 4 is disposed between the stationary scroll 3 and the silencer cover 2. The stationary scroll 3 is fixedly disposed within the low-pressure chamber 52. The floating sealing assembly 4 forms a back pressure chamber 61 and a first flow channel 62. The compression output port 31 of the stationary scroll 3 communicates with the back pressure chamber 61 through the first flow channel 62. The floating sealing assembly 4 includes a floating sealing ring 41. The fluid flowing into the back pressure chamber 61 drives the floating sealing ring 41 to press axially against the silencer cover 2, thereby sealing the compression output port 31 with the first connecting hole of the silencer cover 2, thus connecting the compression output port 31 with the high-pressure chamber 51.

[0051] When the scroll compressor is in compression operation, the high-pressure fluid output from the compression output port 31 of the stationary scroll 3 is divided into a first part and a second part. The first part of the high-pressure fluid flows into the high-pressure chamber 51 through the floating sealing assembly 4 and the first connecting hole. The second part of the high-pressure fluid flows into the back pressure chamber 61 through the first flow channel 62. The high-pressure fluid flowing into the back pressure chamber 61 pushes the floating sealing ring 41 to move axially, so that the floating sealing ring 41 presses against the muffler cover 2 and seals the gap between it and the muffler cover 2, thereby enabling the first part of the high-pressure fluid to flow stably into the high-pressure chamber 51.

[0052] Since the fluid delivered to the back pressure chamber 61 is a high-pressure fluid, compared with the prior art, the force of the fluid flowing into the back pressure chamber 61 pushing the floating sealing ring 41 to press against the muffler cover 2 in the axial direction is increased, which can effectively improve the reliability of the gap between the floating sealing ring 41 and the muffler cover 2.

[0053] Secondly, since the fluid delivered to the back pressure chamber 61 is a high-pressure fluid, compared with the prior art, the scroll compressor can quickly and efficiently build up pressure in the early stage of startup, so that the floating sealing ring 41 seals the gap between the silencer cover 2, which can effectively prevent the disc from coming off.

[0054] Secondly, compared with the existing technology of opening a channel on the stationary volute to connect the back pressure chamber and the medium pressure zone of the compression chamber, it can avoid setting a channel on the stationary volute 3, so that the stationary volute 3 has enough space to set the compression output port 31, which effectively reduces the design and processing difficulty of the stationary volute 3, and is also conducive to reducing the processing accuracy and assembly accuracy of the end of the stationary volute 3 close to the muffler cover 2 along the axial direction.

[0055] Therefore, this scroll compressor has good working performance, low design difficulty, low processing difficulty, and is easy to assemble.

[0056] Specifically, "disengagement" refers to the phenomenon where the moving scroll 10 and the stationary scroll 3 fail to mesh during operation due to abnormal stress or assembly problems. This manifests as the moving teeth of the moving scroll 10 deviating from their normal meshing position from the stationary teeth of the stationary scroll 3, causing leakage in the compression chamber or even mechanical collision.

[0057] Among them, such as Figure 1-3 As shown, the floating seal assembly 4 also includes a sealing transition ring 42 that is sealed to the stationary volute 3, and a back pressure cavity 61 is formed between the sealing transition ring 42 and the floating seal ring 41. This arrangement effectively reduces the design and manufacturing difficulty of the stationary volute 3 and the floating seal assembly 4 compared to the prior art where a back pressure cavity is directly formed between the stationary volute and the floating seal structure.

[0058] Specifically, such as Figure 1-4As shown, at least one of the adjacent end faces of the sealing transition ring 42 and the floating sealing ring 41 is recessed with a groove, and the recessed groove is closed by the other of the sealing transition ring 42 and the floating sealing ring 41 to form a back pressure cavity 61. That is, the end face of the sealing transition ring 42 near the floating sealing ring 41 is recessed with a groove, and the end face of the floating sealing ring 41 near the sealing transition ring 42 closes the groove to form a back pressure cavity 61; and / or, the end face of the floating sealing ring 41 near the sealing transition ring 42 is recessed with a groove, and the end face of the sealing transition ring 42 near the floating sealing ring 41 closes the groove to form a back pressure cavity 61. This allows the back pressure cavity 61 to be formed.

[0059] In this embodiment, as Figure 1-4 As shown, the exemplary groove configuration includes a first groove 421 and a second groove 411. The first groove 421 is recessed on the end face of the sealing adapter ring 42 near the floating sealing ring 41, and the second groove 411 is recessed on the end face of the floating sealing ring 41 near the sealing adapter ring 42. The outer periphery of the floating sealing ring 41 slides axially to seal the first groove 421, and the inner periphery of the sealing adapter ring 42 is axially inserted into the second groove 411. The first groove 421 and the second groove 411 are connected to form a back pressure cavity 61. It is understood that the specific structural form of the groove is not limited, as long as it can form a back pressure cavity 61.

[0060] Preferably, such as Figure 2 As shown, the scroll compressor also includes a first sealing ring 7, which is disposed between the sealing transition ring 42 and the floating sealing ring 41. The first sealing ring 7 is used to isolate the back pressure chamber 61 and the low pressure chamber 52 from each other. That is, the mating gap between the sealing transition ring 42 and the floating sealing ring 41 at the outer periphery of the back pressure chamber 61 is sealed by the first sealing ring 7, thereby isolating the back pressure chamber 61 and the low pressure chamber 52 from each other. This prevents the high-pressure fluid entering the back pressure chamber 61 from leaking into the low pressure chamber 52, thereby further improving the reliability of the sealing gap between the floating sealing ring 41 and the silencer cover 2, and further improving the efficiency and effect of the scroll compressor in building up pressure during the initial startup phase.

[0061] Specifically, in this embodiment, such as Figure 2 As shown, the exemplary configuration of the first sealing ring 7 includes a first annular sealing portion 71 and a second annular sealing portion 72 connected to each other. The first annular sealing portion 71 is partially embedded in the outer periphery of the floating sealing ring 41 and sandwiched between the sealing transition ring 42 and the floating sealing ring 41. The second annular sealing portion 72 elastically presses against the outer peripheral wall of the first groove 421 radially. This ensures that the first sealing ring 7 isolates the back pressure chamber 61 and the low pressure chamber 52 from each other, and even if the floating sealing ring 41 moves axially relative to the sealing transition ring 42 and approaches the muffler cover 2, the back pressure chamber 61 and the low pressure chamber 52 can still be isolated from each other. Further, in this embodiment, as... Figure 2As shown, when the first sealing ring 7 is not subjected to external force, the first annular sealing portion 71 and the second annular sealing portion 72 are vertically distributed, and the cross-section of the first sealing ring 7 along the circumferential direction is L-shaped. Further, in this embodiment, as... Figure 4 As shown, the outer peripheral wall of the floating seal is recessed with a second limiting groove 413, and the first annular sealing part 71 is partially embedded in the second limiting groove 413 and sandwiched between the sealing transition ring 42 and the floating sealing ring 41. In other embodiments, the first sealing ring 7 can also be an O-ring, located on the outer periphery of the back pressure cavity 61, and always completely sandwiched between the sealing transition ring 42 and the floating sealing ring 41. This also achieves the goal of always isolating the back pressure cavity 61 and the low pressure cavity 52 from each other. It is understood that the specific structural form of the first sealing ring 7 is not limited, as long as it can always isolate the back pressure cavity 61 and the low pressure cavity 52 from each other.

[0062] Optionally, such as Figure 1-4 As shown, the sealing adapter ring 42 and the stationary volute 3 are separately formed, with the sealing adapter ring 42 being sealed and fixedly connected to the stationary volute 3. This allows the sealing adapter ring 42 to be sealed on the stationary volute 3, and facilitates the forming of the compression output port 31 on the stationary volute 3, as well as the forming of a groove on the sealing adapter ring 42. Specifically, the sealing adapter ring 42 and the stationary volute 3 are fixedly connected by welding, screw connection, bolt and nut connection, etc.

[0063] As an alternative, the sealing adapter ring 42 is integrally formed into the stationary scroll plate 3. This also allows the sealing adapter ring 42 to be sealed within the stationary scroll plate 3, while reducing the number of parts.

[0064] In this embodiment, as Figure 1-4 As shown, in an exemplary embodiment, the sealing transition ring 42 and the stationary scroll 3 are separately formed, with the sealing transition ring 42 being sealed and fixedly connected to the stationary scroll 3. Further, in this embodiment, as... Figure 1 and Figure 3 As shown, the exemplary setting of the sealing adapter ring 42 is provided with a first connecting hole 423, the stationary vortex 3 is provided with a second connecting hole, and the screw passes through the first connecting hole 423 and is threadedly connected to the second connecting hole.

[0065] Furthermore, in this embodiment, as Figure 2 As shown, the scroll compressor also includes a second sealing ring 8, which is located on the outer periphery of the compression outlet 31 and is sandwiched between the sealing transition ring 42 and the stationary scroll 3. This achieves a sealed and fixed connection between the sealing transition ring 42 and the stationary scroll 3. Further, as... Figure 2 As shown, in this embodiment, the second sealing ring 8 is an O-ring. It is understood that the specific structure of the second sealing ring 8 can be adapted to meet actual working conditions.

[0066] Among them, such as Figure 1 As shown, the sealing transition ring 42 and the floating sealing ring 41 also form a second flow channel 63, through which the compression output port 31 is connected to the first connecting hole. That is, the high-pressure fluid flowing out of the compression output port 31 flows through the second flow channel 63 to the first connecting hole, and then flows into the high-pressure chamber 51 through the first connecting hole. This achieves the connection between the compression output port 31 and the high-pressure chamber 51.

[0067] Specifically, such as Figure 1-4 As shown, the sealing adapter ring 42 is provided with a second connecting hole 422, and the floating sealing ring 41 is provided with a third connecting hole 414. The second connecting hole 422 and the third connecting hole 414 form a second flow channel 63. The compression output port 31, the second connecting hole 422, the third connecting hole 414, the first connecting hole, and the high-pressure chamber 51 are connected in sequence to achieve the connection between the compression output port 31 and the high-pressure chamber 51.

[0068] In this embodiment, as Figure 1 As shown, preferably, the central axis of the second connecting hole 422, the central axis of the third connecting hole 414, and the central axis of the first connecting hole are collinear. This improves the efficiency of the high-pressure fluid flowing sequentially through the second flow channel 63 and the first connecting hole into the high-pressure chamber 51, and also effectively reduces the volume and design complexity of the sealing transition ring 42 and the floating sealing ring 41. Furthermore, in this embodiment, as... Figure 1 As shown, the central axis of the second connecting hole 422, the central axis of the third connecting hole 414, the central axis of the first connecting hole, the axial direction of the floating sealing ring 41, the axial direction of the sealing transition ring 42, and the axial direction of the stationary volute 3 are all parallel.

[0069] Among them, such as Figure 1 and Figure 2 As shown, the scroll compressor also includes an elastic sealing structure 9, which includes an elastic element 91 and a third sealing ring 92. One of the ends of the floating sealing ring 41 and the muffler cover 2 that are close to each other is recessed with a first limiting groove 412. One end of the elastic element 91 is disposed in the first limiting groove 412, and the third sealing ring 92 is disposed at the other end of the elastic element 91. The third sealing ring 92 elastically presses against the inner peripheral wall of the first limiting groove 412 in the radial direction, and elastically presses against the other end of the floating sealing ring 41 and the muffler cover 2 that are close to each other in the axial direction.

[0070] The scroll compressor is less affected by factors such as vibration during the initial pressure build-up phase. Therefore, the force applied by the elastic element 91 to the third sealing ring 92 enables the third sealing ring 92 to effectively seal the gap between itself and the inner circumferential wall of the first limiting groove 412, and also effectively seal the gap between itself and the silencer cover 2. This further improves the efficiency and effectiveness of the scroll compressor in building up pressure during the initial startup phase.

[0071] After the scroll compressor finishes startup and enters the compression working state, it is greatly affected by factors such as vibration. Therefore, under the influence of these factors, the force applied by the elastic element 91 to the third sealing ring 92 cannot ensure that the third sealing ring 92 can effectively seal the gap between itself and the inner peripheral wall of the first limiting groove 412, and effectively seal the gap between itself and the muffler cover 2. However, after the scroll compressor finishes startup and enters the compression working state, the high-pressure fluid in the back pressure chamber 61 pushes the floating sealing ring 41 to move axially, causing the floating sealing ring 41 to press against the muffler cover 2 and seal the gap between itself and the muffler cover 2. This can be understood as... The axial force exerted by the high-pressure fluid in the back pressure chamber 61 on the floating sealing ring 41 is much greater than the axial force exerted by the elastic element 91 on the floating sealing ring 41. The axial force exerted by the high-pressure fluid in the back pressure chamber 61 on the floating sealing ring 41 can overcome the force exerted by the elastic element 91 on the floating sealing ring 41, so that the floating sealing ring 41 and the third sealing ring 92 are reliably pressed against the muffler cover 2 along the axial direction. The floating sealing ring 41 and the third sealing ring 92 jointly seal the gap between the floating sealing ring 41 and the muffler cover 2, thereby further improving the reliability of the floating sealing ring 41 in sealing the gap between the floating sealing ring 41 and the muffler cover 2.

[0072] In this embodiment, the elastic element 91 is exemplarily taken as a compression spring. In other embodiments, the elastic element 91 may also be made of a material with elastic deformation capability, such as rubber.

[0073] In this embodiment, as Figure 1 , Figure 2 and Figure 4As shown, the first limiting groove 412 is disposed on the floating sealing ring 41; the third sealing ring 92 is provided with a fourth connecting hole, one end of which is connected to the third connecting hole 414, and the other end of which is connected to the first connecting hole. The high-pressure fluid flowing to the third connecting hole 414 flows through the elastic member 91 and the fourth connecting hole to the first connecting hole, and then flows into the high-pressure chamber 51 through the first connecting hole. Further, in this embodiment, it is preferable that the first limiting groove 412 is connected to the third connecting hole 414 and located on the outer periphery of the third connecting hole 414, and the central axis of the first limiting groove 412 is collinear with the central axis of the third connecting hole 414. This can reduce the design and manufacturing difficulty of the floating sealing ring 41. In other embodiments, the first limiting groove 412 can also be disposed on the silencer cover 2. In other embodiments, a first limiting groove 412 may be provided on both the muffler cover 2 and the floating sealing ring 41 at one end. The first limiting groove 412 provided on the muffler cover 2 is a first sub-limiting groove, and the first limiting groove 412 provided on the floating sealing ring 41 is a second sub-limiting groove. One end of the elastic member 91 is provided in one of the first sub-limiting groove and the second sub-limiting groove, and the third sealing ring 92 is provided at the other end of the elastic member 91. The third sealing ring 92 elastically abuts against the inner peripheral wall of the first sub-limiting groove and the inner peripheral wall of the second sub-limiting groove in the radial direction, and elastically abuts against the inner bottom wall of the other of the first sub-limiting groove and the second sub-limiting groove in the axial direction.

[0074] In this embodiment, as Figure 1 , Figure 2 and Figure 4 As shown, the exemplary configuration of the third sealing ring 92 includes a third annular sealing portion 921 and a fourth annular sealing portion 922 connected together. A mounting limiting groove is formed between the third annular sealing portion 921 and the fourth annular sealing portion 922. The other end of the elastic member 91 is inserted into the mounting limiting groove. The third annular sealing portion 921 elastically presses against the inner peripheral wall of the first limiting groove 412 radially, and the fourth annular sealing portion 922 elastically presses against the silencer cover 2 axially. The fourth annular sealing portion 922 also forms a fourth communicating hole. Further, in this embodiment, when the third sealing ring 92 is not subjected to external force, the third annular sealing portion 921 and the fourth annular sealing portion 922 are vertically distributed, and the cross-section of the third sealing ring 92 along the circumferential direction is L-shaped. In other embodiments, the third sealing ring 92 can also be a sealing ring with a rectangular circumferential cross-section, and the axial end face and outer peripheral face of the third sealing ring 92 are used for sealing. Understandably, the specific structural form of the third sealing ring 92 is not limited. As long as the gap between the floating sealing ring 41 and the silencer cover 2 is sealed during the initial pressure build-up phase of the scroll compressor, it is sufficient.

[0075] Among them, such as Figure 1As shown, the scroll compressor also includes a moving scroll 10, which meshes with the stationary scroll 3 to form a compression chamber. Specifically, the scroll compressor also includes a drive motor, the stator of which is fixedly disposed inside the housing 1, and the drive shaft of which is fixedly disposed through the rotor of the drive motor and connected to the moving scroll 10. The drive shaft can drive the moving scroll 10 to mesh with the stationary scroll 3. Under the action of pressure difference, the fluid in the low-pressure chamber 52 can automatically flow into the compression chamber formed by the moving scroll 10 and the stationary scroll 3. After being compressed into high-pressure fluid, it flows out from the compression output port 31 of the stationary scroll 3. The high-pressure fluid output from the compression output port 31 of the stationary scroll 3 is divided into a first part and a second part. The first part of the high-pressure fluid flows into the high-pressure chamber 51 through the second connecting hole 422, the third connecting hole 414, the fourth connecting hole and the first connecting hole. The second part of the high-pressure fluid flows into the back pressure chamber 61 through the first flow channel 62. The high-pressure fluid flowing into the back pressure chamber 61 pushes the floating sealing ring 41 to move axially, so that the floating sealing ring 41 presses against the muffler cover 2 and seals the gap between it and the muffler cover 2, thereby enabling the first part of the high-pressure fluid to flow stably into the high-pressure chamber 51. Specifically, the drive motor and the moving scroll 10 are both located in the low-pressure chamber 52.

[0076] The scroll compressor also includes a bearing housing fixedly installed within the low-pressure chamber 52, with the stationary scroll 3 fixedly connected to one end of the bearing housing near the muffler cover 2. This ensures that the stationary scroll 3 is fixedly installed within the housing 1.

[0077] Optionally, the bearing housing is fixedly connected to the housing 1. This ensures that the bearing housing is fixedly installed within the low-pressure chamber 52. Specifically, the bearing housing is fixed to the housing 1 by welding, bolts, and nuts.

[0078] As an alternative, the scroll compressor also includes a cylinder liner fixedly connected to the inner peripheral wall of the housing 1. The cylinder liner is located away from the stationary scroll 3 relative to the bearing housing, and the bearing housing is fixedly connected to the cylinder liner and spaced apart from the inner peripheral wall of the housing 1. The stator of the drive motor is fixedly mounted on the cylinder liner. This also allows for fixing the bearing housing in the low-pressure chamber 52. The cylinder liner is fixedly connected to the inner peripheral wall of the housing 1 by means of integral molding, interference fit, welding, screw connection, bolt and nut connection, etc. Specifically, the cylinder liner is located in the low-pressure chamber 52.

[0079] As an alternative, the stationary scroll 3 is fixedly connected to the inner peripheral wall of the housing 1. The stationary scroll 3 and the housing 1 are fixedly connected by welding, screw connection, bolt and nut connection, etc.

[0080] The bearing housing has a mounting cavity, and the bearing is located within the mounting cavity. The outer ring of the bearing is fixedly connected to the inner circumferential wall of the mounting cavity. The drive shaft of the drive motor is fixedly inserted through the rotor and the inner ring of the bearing and connected to the moving scroll 10. This improves the smoothness of the drive motor's output shaft driving the moving scroll 10. The drive shaft of the drive motor is positioned relative to the inner ring of the bearing in the circumferential direction by means of key connection, integral molding, or other methods.

[0081] The housing 1 has an inlet communicating with the low-pressure chamber 52 and an outlet communicating with the high-pressure chamber 51. Gas flows into the low-pressure chamber 52 through the inlet. Under the action of the pressure difference, the gas in the low-pressure chamber 52 automatically flows into the compression chamber formed by the moving volute 10 and the stationary volute 3. After being compressed into high-pressure gas, it flows sequentially through the compression output port 31, the second connecting hole 422, the third connecting hole 414, the fourth connecting hole, the first connecting hole and the high-pressure chamber 51, and is discharged from the outlet.

[0082] Example 2

[0083] This embodiment includes the scroll compressor described in Embodiment 1, and Embodiment 1 will be further described as follows:

[0084] Among them, such as Figure 1-3 As shown, the first flow channel 62 is disposed on the sealing transition ring 42; one end of the first flow channel 62 is connected to the second flow channel 63, and the other end of the first flow channel 62 is connected to the back pressure chamber 61. Specifically, one end of the first flow channel 62 is connected to the second connecting hole 422, and the other end of the first flow channel 62 is connected to the back pressure chamber 61. This allows the high-pressure fluid output from the compression output port 31 of the stationary vortex disk 3 to be divided into a first part and a second part. The first part of the high-pressure fluid flows into the high-pressure chamber 51, and the second part of the high-pressure fluid flows into the back pressure chamber 61. The high-pressure fluid flowing into the back pressure chamber 61 pushes the floating sealing ring 41 to move axially, causing the floating sealing ring 41 to press against the muffler cover 2 and seal the gap between it and the muffler cover 2, thereby allowing the first part of the high-pressure fluid to flow stably into the high-pressure chamber 51.

[0085] Specifically, the first flow channel 62 can be adapted to be a straight flow channel or a non-straight flow channel according to the actual working conditions. Furthermore, if the first flow channel 62 is a straight flow channel, the extension direction of the first flow channel 62 can be adapted to be parallel, perpendicular or at an angle to the axial direction of the sealing transition ring 42 according to the actual working conditions.

[0086] In this embodiment, as Figure 1-3As shown, the exemplary configuration of the compression output port 31 includes a first output segment 311 and a second output segment 312 that are connected and have collinear central axes. The second output segment 312 is closer to the sealing transition ring 42 relative to the first output segment 311, and the diameter of the second output segment 312 is larger than the diameter of the first output segment 311. The second connecting hole 422 includes a first hole segment 4221 and a second hole segment 4222 that are connected and have collinear central axes. The first hole segment 4221 is closer to the stationary volute 3 relative to the second hole segment 4222, and the diameter of the first hole segment 4221 is larger than the diameter of the second hole segment 4222. The first output segment 311, the second output segment 312, the first hole segment 4221, and the second hole segment 4222 are connected sequentially. The diameter of the second output segment 312 is equal to the diameter of the first hole segment 4221.

[0087] In this embodiment, as Figure 1-3 As shown, the extension direction of the first flow channel 62 is parallel to the axial direction of the sealing transition ring 42. One end of the first flow channel 62 is connected to the first hole section 4221, and the other end of the first flow channel 62 is connected to the back pressure chamber 61. This configuration allows the high-pressure fluid output from the second output section 312 to flow directly into the back pressure chamber 61 along the axial direction of the stationary scroll plate 3 through the first flow channel 62. This effectively improves the efficiency of delivering high-pressure fluid into the back pressure chamber 61, thereby further improving the efficiency and effect of rapid pressure build-up of the scroll compressor in the initial stage of startup. It also further improves the reliability of the gap between the floating sealing ring 41 and the silencer cover 2 after the scroll compressor finishes startup and enters the compression working state.

[0088] In other embodiments, one end of the first flow channel 62 may be connected to the first hole section 4221, and the other end of the first flow channel 62 may be connected to the back pressure cavity 61. The extension direction of the first flow channel 62 is not parallel to the axial direction of the sealing transition ring 42.

[0089] In other embodiments, one end of the first flow channel 62 may be connected to the second orifice 4222, and the other end of the first flow channel 62 may be connected to the back pressure chamber 61. Further, the extending direction of the first flow channel 62 may be perpendicular to or at an angle to the axial direction of the sealing transition ring 42. Under this premise, the diameter of the first output section 311 may be equal to the diameter of the second output end, or the diameter of the first output section 311 may be larger than the diameter of the second output end. Under this premise, the diameter of the first orifice 4221 may be equal to the diameter of the second orifice 4222, or the diameter of the first orifice 4221 may be smaller than the diameter of the second orifice 4222.

[0090] Preferably, such as Figure 1-3As shown, the maximum flow cross-sectional area of ​​the first flow channel 62 is smaller than the minimum flow cross-sectional area of ​​the compression output port 31. This causes most of the high-pressure fluid output from the compression output port 31 to flow into the high-pressure chamber 51, while a small portion flows into the back pressure chamber 61. Specifically, the volume of the back pressure chamber 61 is much smaller than the volume of the high-pressure chamber 51.

[0091] In this embodiment, the aperture of the first flow channel 62 is set to 1.5 mm. In other embodiments, the aperture of the first flow channel 62 can be adjusted adaptively according to actual working conditions, or the cross-sectional shape and size of the first flow channel 62 can be adjusted adaptively.

[0092] Optionally, for the first flow channel 62 being disposed on the sealing transition ring 42, with one end of the first flow channel 62 communicating with the second flow channel 63 and the other end of the first flow channel 62 communicating with the back pressure cavity 61, it can be configured such that the fitting gap between the sealing transition ring 42 and the floating sealing ring 41 at the inner circumference of the back pressure cavity 61 is sealed by the fifth sealing ring, thereby isolating the back pressure cavity 61 and the second flow channel 63 from each other; Figure 2 As shown, it is also possible to configure a fitting gap between the sealing transition ring 42 and the floating sealing ring 41 at the inner circumference of the back pressure cavity 61 to connect the back pressure cavity 61 and the second flow channel 63.

[0093] Specifically, the fifth sealing ring seals the fit gap between the sealing transition ring 42 and the floating sealing ring 41 at the inner circumference of the back pressure cavity 61, thereby isolating the back pressure cavity 61 and the second flow channel 63 from each other, resulting in a good sealing effect for the back pressure cavity 61.

[0094] Specifically, such as Figure 2 As shown, the fitting gap between the sealing transition ring 42 and the floating sealing ring 41 at the inner circumference of the back pressure chamber 61, which connects the back pressure chamber 61 and the second flow channel 63, can also serve as a channel connecting the second flow channel 63 and the back pressure chamber 61. This arrangement eliminates the need for a fifth sealing ring to isolate the back pressure chamber 61 and the second flow channel 63, effectively simplifying the structure and improving production efficiency. It also increases the amount of high-pressure fluid delivered to the back pressure chamber 61 per unit time, further enhancing the efficiency and effectiveness of rapid pressure build-up in the initial startup phase of the scroll compressor, and effectively improving the operational safety of the scroll compressor after startup and when it enters the compression working state.

[0095] Example 3

[0096] This embodiment includes the scroll compressor described in Embodiment 1 or Embodiment 2, and will be further described as follows:

[0097] The first flow channel 62 is disposed on the floating sealing ring 41; one end of the first flow channel 62 is connected to the second flow channel 63, and the other end of the first flow channel 62 is connected to the back pressure cavity 61. Specifically, one end of the first flow channel 62 is connected to the third connecting hole 414, and the other end of the first flow channel 62 is connected to the back pressure cavity 61.

[0098] The high-pressure fluid output from the compression output port 31 of the static vortex disk 3 is divided into a first part and a second part. The first part of the high-pressure fluid flows into the high-pressure chamber 51, and the second part of the high-pressure fluid flows into the back pressure chamber 61. The high-pressure fluid flowing into the back pressure chamber 61 pushes the floating sealing ring 41 to move axially, so that the floating sealing ring 41 presses against the muffler cover 2 and seals the gap between it and the muffler cover 2, thereby enabling the first part of the high-pressure fluid to flow stably into the high-pressure chamber 51.

[0099] Specifically, the first flow channel 62 can be adapted to be a straight flow channel or a non-straight flow channel according to the actual working conditions. Furthermore, if the first flow channel 62 is a straight flow channel, the extension direction of the first flow channel 62 can be adapted to be perpendicular to or at an angle to the axial direction of the floating sealing ring 41 according to the actual working conditions.

[0100] Example 4

[0101] This embodiment includes the scroll compressor described in Embodiment 1, and Embodiment 1 will be further described as follows:

[0102] Among them, such as Figure 2 As shown, the first flow channel 62 is the fitting gap between the sealing transition ring 42 and the floating sealing ring 41 at the inner circumference of the back pressure cavity 61; one end of the first flow channel 62 is connected to the second flow channel 63, and the other end of the first flow channel 62 is connected to the back pressure cavity 61.

[0103] The high-pressure fluid output from the compression output port 31 of the static vortex disk 3 is divided into a first part and a second part. The first part of the high-pressure fluid flows into the high-pressure chamber 51, and the second part of the high-pressure fluid flows into the back pressure chamber 61. The high-pressure fluid flowing into the back pressure chamber 61 pushes the floating sealing ring 41 to move axially, so that the floating sealing ring 41 presses against the muffler cover 2 and seals the gap between it and the muffler cover 2, thereby enabling the first part of the high-pressure fluid to flow stably into the high-pressure chamber 51.

[0104] Secondly, this arrangement eliminates the need for a fifth sealing ring at the mating gap between the sealing transition ring 42 and the floating sealing ring 41 at the inner circumference of the back pressure chamber 61, and also eliminates the need to create flow channels separately on the sealing transition ring 42 and the floating sealing ring 41, thereby further simplifying the structure and improving production efficiency.

[0105] Understandably, the shape of the first flow channel 62 is determined by the specific structure of the sealing transition ring 42 and the floating sealing ring 41.

[0106] Example 5

[0107] This embodiment includes the scroll compressor described in Embodiment 1, and Embodiment 1 will be further described as follows:

[0108] The first flow channel 62 is disposed on the sealing transition ring 42. One end of the first flow channel 62 is connected to the compression output port 31, and the other end of the first flow channel 62 is connected to the back pressure chamber 61. Specifically, the first end of the first flow channel 62 is connected to the compression output port 31, and the second end of the first flow channel 62 is connected to the back pressure chamber 61.

[0109] It is understood that the first flow channel 62 and the second connecting hole 422 are independent of each other and both are connected to the compression output port 31. At least the first end of the first flow channel 62 is located within the orthogonal projection of the outlet end of the compression output port 31 along the axial direction of the stationary vortex disk 3.

[0110] The high-pressure fluid output from the compression output port 31 of the static vortex disk 3 is divided into a first part and a second part. The first part of the high-pressure fluid flows into the high-pressure chamber 51, and the second part of the high-pressure fluid flows into the back pressure chamber 61. The high-pressure fluid flowing into the back pressure chamber 61 pushes the floating sealing ring 41 to move axially, so that the floating sealing ring 41 presses against the muffler cover 2 and seals the gap between it and the muffler cover 2, thereby enabling the first part of the high-pressure fluid to flow stably into the high-pressure chamber 51.

[0111] Preferably, the extension direction of the first flow channel 62 is parallel to the axial direction of the sealing transition ring 42. This configuration allows the high-pressure fluid output from the outlet end of the compression output port 31 to flow directly into the back pressure chamber 61 along the axial direction of the stationary scroll plate 3 through the first flow channel 62. This effectively improves the efficiency of delivering high-pressure fluid into the back pressure chamber 61, thereby further improving the efficiency and effect of rapid pressure build-up of the scroll compressor during the initial startup phase. It also further improves the reliability of the seal between the floating sealing ring 41 and the silencer cover 2 after the scroll compressor enters the compression working state after startup.

[0112] In other embodiments, the extension direction of the first flow channel 62 may be set at an angle to the axial direction of the sealing transition ring 42. This ensures that the first end of the first flow channel 62 is connected to the compression output port 31, and the second end of the first flow channel 62 is connected to the back pressure chamber 61.

[0113] Preferably, the maximum flow cross-sectional area of ​​the first flow channel 62 is smaller than the minimum flow cross-sectional area of ​​the compression output port 31. This ensures that most of the high-pressure fluid output from the compression output port 31 flows into the high-pressure chamber 51, while a small portion flows into the back pressure chamber 61. Specifically, the volume of the back pressure chamber 61 is much smaller than the volume of the high-pressure chamber 51.

[0114] Optionally, for the first flow channel 62 being disposed on the sealing transition ring 42, with one end of the first flow channel 62 communicating with the compression output port 31 and the other end of the first flow channel 62 communicating with the back pressure chamber 61, it can be configured such that the fitting gap between the sealing transition ring 42 and the floating sealing ring 41 at the inner circumference of the back pressure chamber 61 is sealed by the fifth sealing ring, thereby isolating the back pressure chamber 61 and the second flow channel 63 from each other; Figure 2 As shown, it is also possible to configure a fitting gap between the sealing transition ring 42 and the floating sealing ring 41 at the inner circumference of the back pressure cavity 61 to connect the back pressure cavity 61 and the second flow channel 63.

[0115] Specifically, the fifth sealing ring seals the fit gap between the sealing transition ring 42 and the floating sealing ring 41 at the inner circumference of the back pressure cavity 61, thereby isolating the back pressure cavity 61 and the second flow channel 63 from each other, resulting in a good sealing effect for the back pressure cavity 61.

[0116] Specifically, such as Figure 2 As shown, the fitting gap between the sealing transition ring 42 and the floating sealing ring 41 at the inner circumference of the back pressure chamber 61, which connects the back pressure chamber 61 and the second flow channel 63, can also serve as a channel connecting the compression output port 31 and the back pressure chamber 61. This arrangement eliminates the need for a fifth sealing ring to isolate the back pressure chamber 61 and the second flow channel 63, effectively simplifying the structure and improving production efficiency. It also increases the amount of high-pressure fluid delivered to the back pressure chamber 61 per unit time, further enhancing the efficiency and effectiveness of rapid pressure build-up in the initial startup phase of the scroll compressor, and effectively improving the operational safety of the scroll compressor after startup and transition to compression operation.

[0117] Optionally, for the first flow channel 62 being disposed on the sealing transition ring 42, with one end of the first flow channel 62 connected to the compression output port 31 and the other end of the first flow channel 62 connected to the back pressure chamber 61, a channel connecting the second flow channel 63 and the back pressure chamber 61 may be further provided on the floating sealing ring 41.

[0118] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. Scroll compressor, comprising a housing (1), a sound cover (2), a fixed scroll (3) and a floating seal assembly (4), the outer edge of the sound cover (2) is fixedly sealed to the inner circumferential wall of the housing (1) in the circumferential direction to separate the inner cavity of the housing (1) into a high-pressure cavity (51) and a low-pressure cavity (52), and the floating seal assembly (4) is arranged between the fixed scroll (3) and the sound cover (2); characterized in that: the fixed scroll (3) is fixedly arranged in the low-pressure cavity (52); the floating seal assembly (4) is formed with a back pressure cavity (61) and a first flow channel (62), the compression outlet (31) of the fixed scroll (3) communicates with the back pressure cavity (61) through the first flow channel (62); the floating seal assembly (4) comprises a floating seal ring (41), the fluid flowing into the back pressure cavity (61) can drive the floating seal ring (41) to abut against the sound cover (2) in the axial direction, so that the floating seal assembly (4) seals and communicates the compression outlet (31) with the first communication hole of the sound cover (2), so that the compression outlet (31) communicates with the high-pressure cavity (51). the floating seal assembly (4) further comprises a sealing adapter ring (42) sealingly arranged on the fixed scroll (3), the sealing adapter ring (42) and the floating seal ring (41) form the back pressure cavity (61), and the back pressure cavity (61) and the low-pressure cavity (52) are isolated from each other; the sealing adapter ring (42) and the floating seal ring (41) further form a second flow channel (63), and the compression outlet (31) communicates with the first communication hole through the second flow channel (63); the first flow channel (62) is arranged on the sealing adapter ring (42), and / or the first flow channel (62) is arranged on the floating seal ring (41), and / or the first flow channel (62) is a fitting gap between the sealing adapter ring (42) and the floating seal ring (41) at the inner periphery of the back pressure cavity (61); one end of the first flow channel (62) communicates with the second flow channel (63), and the other end of the first flow channel (62) communicates with the back pressure cavity (61).

2. The scroll compressor of claim 1, wherein the floating seal assembly (4) further comprises a sealing adapter ring (42) sealingly arranged on the fixed scroll (3), the sealing adapter ring (42) and the floating seal ring (41) form the back pressure cavity (61), and the back pressure cavity (61) and the low-pressure cavity (52) are isolated from each other; the first flow channel (62) is arranged on the sealing adapter ring (42), one end of the first flow channel (62) communicates with the compression outlet (31), and the other end of the first flow channel (62) communicates with the back pressure cavity (61).

3. The scroll compressor of claim 1, wherein the extension direction of the first flow channel (62) is parallel to the axial direction of the sealing adapter ring (42); and / or the maximum flow cross-sectional area of the first flow channel (62) is smaller than the minimum flow cross-sectional area of the compression outlet (31). ​ 4. The scroll compressor of claim 3, wherein ​ 5. The scroll compressor of any one of claims 2-4, wherein, At least one of the end faces of the sealing adapter ring (42) and the floating sealing ring (41) is recessed with a groove, and the one recessed with the groove is closed by the other one of the sealing adapter ring (42) and the floating sealing ring (41) to form the back pressure cavity (61).

6. The scroll compressor of any one of claims 2-4, wherein, The scroll compressor further comprises a first sealing ring (7) arranged between the sealing adapter ring (42) and the floating sealing ring (41), and the first sealing ring (7) is used to isolate the back pressure cavity (61) and the low pressure cavity (52) from each other.

7. The scroll compressor according to any one of claims 2-4, characterized in that: The sealing adapter ring (42) is integrally formed with the static scroll (3); or The sealing adapter ring (42) and the static scroll (3) are formed separately, and the sealing adapter ring (42) is sealingly and fixedly connected to the static scroll (3).

8. The scroll compressor of claim 7, wherein, The sealing adapter ring (42) and the static scroll (3) are formed separately, and the scroll compressor further comprises a second sealing ring (8) located at the outer periphery of the compression outlet (31) and clamped between the sealing adapter ring (42) and the static scroll (3).

9. The scroll compressor of any one of claims 1-4, wherein, The scroll compressor further comprises an elastic sealing structure (9) comprising an elastic member (91) and a third sealing ring (92), one of the ends of the floating sealing ring (41) and the sound cover (2) is recessed with a first limiting groove (412), one end of the elastic member (91) is arranged in the first limiting groove (412), and the third sealing ring (92) is arranged at the other end of the elastic member (91). The third sealing ring (92) is elastically pressed against the inner peripheral wall of the first limiting groove (412) in the radial direction and elastically pressed against the other one of the ends of the floating sealing ring (41) and the sound cover (2) in the axial direction.

10. The scroll compressor of any one of claims 1-4, wherein, The scroll compressor further comprises a bearing seat fixedly arranged in the low pressure cavity (52), and the static scroll (3) is fixedly connected to one end of the bearing seat close to the sound cover (2).

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