Scroll compressor

Abstract

The invention belongs to the technical field of compressors and discloses a scroll compressor which comprises a shell, a static scroll plate and a dynamic scroll plate, and the static scroll plate and the dynamic scroll plate are positioned in the shell. The static scroll plate comprises a static plate body, static spiral teeth connected to the lower bottom wall of the static plate body, and a peripheral part connected to the periphery of the static plate body and located on the periphery of the static spiral teeth; the movable scroll plate comprises a movable plate body and movable spiral teeth connected to the lower bottom wall of the movable plate body; and a compression cavity is formed among the static disc body, the static rotating teeth, the peripheral part, the movable disc body and the movable rotating teeth. A first flow channel is formed in the static disc body and the peripheral part, the outlet end of the first flow channel communicates with the compression cavity, the inlet end of the first flow channel penetrates through the lower bottom wall of the peripheral part, and the first flow channel is used for conveying enthalpy increasing fluid into the compression cavity. The working performance of the scroll compressor is good; and secondly, the pipeline for conveying the enthalpy-increasing gas to the first flow channel is low in risk of cracks and even breakage, the maintenance frequency is low, and the service life of the pipeline is effectively prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and particularly to scroll compressors. Background Art

[0002] Compressors are usually provided with an ejector enthalpy-increasing pipeline to inject a part of the fluid at intermediate pressure into the compression chamber, and mix it with the fluid in the intermediate-pressure zone and / or high-pressure zone of the compression chamber, which can increase the circulation volume of the fluid and the enthalpy difference of the circulation loop, so as to achieve the purpose of improving the energy efficiency of the compressor.

[0003] At present, the ejector enthalpy-increasing pipelines in the existing technologies usually adopt pipelines such as copper pipes and are arranged on the stationary scroll plate and the housing outside the stationary scroll plate, which can achieve the purpose of improving the energy efficiency of the compressor. However, since the stationary scroll plate is located in the area near the upper end of the compressor in the height direction and the distance from the fixed end at the bottom of the compressor is relatively large, and the vibration caused by the operation of the compressor is more obvious at the top of the compressor, there is a risk that the pipeline is prone to cracks or even fractures, the service life of the pipeline is low, and the maintenance frequency is high. Summary of the Invention

[0004] The purpose of the present invention is to provide a scroll compressor to solve the above problems existing in the compressors in the existing technologies.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A scroll compressor, comprising a housing, and a stationary scroll plate and a moving scroll plate located inside the housing; the stationary scroll plate includes a stationary plate body, stationary spiral teeth connected to the lower bottom wall of the stationary plate body, and an outer peripheral part connected to the outer periphery of the stationary plate body and located outside the stationary spiral teeth; the moving scroll plate includes a moving plate body and moving spiral teeth connected to the lower bottom wall of the moving plate body; a compression chamber is formed between the stationary plate body, the stationary spiral teeth, the outer peripheral part, the moving plate body and the moving spiral teeth;

[0007] A first flow channel is formed on the stationary plate body and the outer peripheral part, the outlet end of the first flow channel communicates with the compression chamber, the inlet end of the first flow channel penetrates the lower bottom wall of the outer peripheral part, and the first flow channel is used to convey enthalpy-increasing fluid into the compression chamber.

[0008] As a preferred solution of the above scroll compressor, the scroll compressor further includes a bearing seat fixedly arranged inside the housing, and the moving scroll plate is located between the stationary scroll plate and the bearing seat; the bearing seat is provided with a second flow channel, the outlet end of the second flow channel is hermetically communicated with the inlet end of the first flow channel, and the inlet end of the second flow channel is used to introduce enthalpy-increasing fluid.

[0009] As a preferred solution of the above scroll compressor, a plug is protruded on one side of the bearing seat close to the outer peripheral part, the plug is sealingly inserted into the inlet end of the first flow channel, and the outlet end of the second flow channel penetrates through the plug;

[0010] Or, a plug is protruded on one side of the outer peripheral part close to the bearing seat, the plug is sealingly inserted into the outlet end of the second flow channel, and the inlet end of the first flow channel penetrates through the plug.

[0011] As a preferred solution of the above scroll compressor, the plug is slidable along its own insertion direction;

[0012] And / or, the insertion direction of the plug is parallel to the axial direction of the bearing seat.

[0013] As a preferred solution of the above scroll compressor, the scroll compressor further includes a first pipe sealingly connected to the bearing seat and partially protruding from the outer peripheral wall of the housing, and the outlet end of the first pipe is sealingly communicated with the inlet end of the second flow channel; the enthalpy-increasing fluid can flow through the first pipe, the second flow channel and the first flow channel in sequence and flow into the compression cavity.

[0014] As a preferred solution of the above scroll compressor, the scroll compressor further includes a buffer plugging member, a jack communicating with the first flow channel is provided on the outer peripheral part, and the buffer plugging member is slidably and sealingly inserted into the jack;

[0015] A first limiting surface is fixedly arranged in the housing, the buffer plugging member can move in the direction of withdrawing from the first flow channel along its own sliding direction and abut against the first limiting surface, and when the buffer plugging member abuts against the first limiting surface, the buffer plugging member is partially sealingly inserted into the jack.

[0016] As a preferred solution of the above scroll compressor, a second limiting surface is fixedly arranged in the housing, and / or the stationary disk body is provided with a second limiting surface, and / or the outer peripheral part is provided with a second limiting surface;

[0017] The buffer plugging member can move in the direction of extending into the first flow channel along its own sliding direction and abut against the second limiting surface, and when the buffer plugging member abuts against the second limiting surface, the buffer plugging member does not block the first flow channel.

[0018] As a preferred solution of the above scroll compressor, the sliding direction of the buffer plugging member is parallel to the axial direction of the stationary scroll disk; and / or,

[0019] The first flow channel includes a first input flow channel section, a buffer flow channel section, and a first output flow channel section that are connected in sequence. The inlet end of the first input flow channel section penetrates the lower bottom wall of the outer peripheral part. The outlet end of the first output flow channel section communicates with the compression cavity. The jack communicates with the buffer flow channel section. The minimum flow cross-sectional area of the buffer flow channel section > the maximum flow cross-sectional area of the first input flow channel section, and / or, the minimum flow cross-sectional area of the buffer flow channel section > the maximum flow cross-sectional area of the first output flow channel section.

[0020] As a preferred solution of the above scroll compressor, a process machining hole is recessed in the outer peripheral wall of the outer peripheral part. The process machining hole extends along the radial direction of the outer peripheral part and communicates with the first flow channel. The scroll compressor further includes a sealing plate that is detachably and sealingly connected to the outside of the outer peripheral part and blocks the process machining hole.

[0021] As a preferred solution of the above scroll compressor, the stationary scroll plate is fixedly arranged in the housing; or,

[0022] The stationary scroll plate is floatingly arranged in the housing along its own axial direction.

[0023] Advantages of the present invention:

[0024] The present invention provides a scroll compressor, which includes a housing, and a stationary scroll plate and a moving scroll plate located in the housing. The stationary scroll plate includes a stationary plate body, stationary spiral teeth connected to the lower bottom wall of the stationary plate body, and an outer peripheral part connected to the outside of the stationary plate body and located outside the stationary spiral teeth. The moving scroll plate includes a moving plate body and moving spiral teeth connected to the lower bottom wall of the moving plate body. A compression cavity is formed among the stationary plate body, the stationary spiral teeth, the outer peripheral part, the moving plate body, and the moving spiral teeth. A first flow channel is formed on the stationary plate body and the outer peripheral part. The outlet end of the first flow channel communicates with the compression cavity. The inlet end of the first flow channel penetrates the lower bottom wall of the outer peripheral part. The first flow channel is used to convey enthalpy-increasing fluid into the compression cavity.

[0025] The scroll compressor is provided with a first flow channel on the stationary plate body and the outer peripheral part, and conveys enthalpy-increasing fluid into the compression cavity through the first flow channel, so that the working performance of the scroll compressor can be effectively improved.

[0026] Among them, compared with the prior art, the inlet end of the first flow channel of the scroll compressor penetrates the lower bottom wall of the outer peripheral part, so that the position where the enthalpy-increasing gas flows into the first flow channel is at the height position of the lower bottom wall of the outer peripheral part, so that the inlet end of the first flow channel is closer to the bottom of the scroll compressor. Therefore, during the process of injecting enthalpy into the scroll compressor, the risk of cracks or even fractures in the pipeline for transporting the enthalpy-increasing gas caused by the vibration of the scroll compressor during operation can be effectively reduced, thereby further improving the working performance of the scroll compressor, reducing the maintenance frequency of the pipeline for transporting the enthalpy-increasing gas, and extending the service life of the pipeline for transporting the enthalpy-increasing gas.

[0027] Secondly, by setting the inlet end of the first flow channel to penetrate the lower bottom wall of the outer peripheral part, the distance between the inlet end and the outlet end of the first flow channel is increased, and the path for the enthalpy-increasing gas to flow into the compression chamber through the first flow channel is lengthened. During the process of injecting enthalpy into the scroll compressor, the pressure fluctuation of the enthalpy-increasing gas can be effectively buffered, thereby further improving the working performance of the scroll compressor.

[0028] Therefore, the scroll compressor has good working performance; secondly, the risk of cracks or even fractures in the pipeline for transporting the enthalpy-increasing gas is low, and the maintenance frequency is low, effectively extending the service life of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a cross-sectional view of the scroll compressor provided by a specific embodiment of the present invention Figure 1 ;

[0030] Figure 2 is a cross-sectional view of the scroll compressor provided by a specific embodiment of the present invention Figure 2 ;

[0031] Figure 3 is Figure 1 a partial view of

[0032] In the figure:

[0033] 1. Housing; 11. High-pressure chamber; 12. Low-pressure chamber;

[0034] 2. Stationary scroll disk; 21. Stationary disk body; 22. Stationary spiral tooth; 23. Outer peripheral part; 231. Second limiting surface; 24. First flow channel; 241. First input flow channel section; 242. Buffer flow channel section; 243. First output flow channel section;

[0035] 3. Moving scroll disk; 31. Moving disk body; 32. Moving spiral tooth;

[0036] 4. Bearing housing; 41. Housing body; 411. Second flow channel; 4111. Second input flow channel section; 4112. Second output flow channel section; 412. Insert block; 42. Thrust plate;

[0037] 51. First pipeline; 52. Pipe joint;

[0038] 6. Buffer sealing member; 61. Guide surface;

[0039] 7. Sound insulation cover; 71. First limiting surface;

[0040] 8. Sealing plate;

[0041] 91. First sealing ring; 92. Second sealing ring; 93. Third sealing ring; 94. Fourth sealing ring; 95. Fifth sealing ring;

[0042] 10. Bearing. Detailed implementation manners

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only parts related to the present invention rather than all structures are shown in the accompanying drawings.

[0044] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0045] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0046] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0047] The present invention provides a scroll compressor. The working fluid in the scroll compressor can be a liquid or a gas. Hereinafter, the case where the working fluid in the scroll compressor is a gas will be specifically introduced.

[0048] As Figure 1 and Figure 2 As shown, the scroll compressor includes a housing 1, a stationary scroll plate 2 and a moving scroll plate 3 located in the housing 1. The stationary scroll plate 2 includes a stationary plate body 21, a stationary spiral tooth 22 connected to the lower bottom wall of the stationary plate body 21, and an outer peripheral portion 23 connected to the outer periphery of the stationary plate body 21 and located outside the stationary spiral tooth 22; the moving scroll plate 3 includes a moving plate body 31 and a moving spiral tooth 32 connected to the lower bottom wall of the moving plate body 31; a compression chamber is formed between the stationary plate body 21, the stationary spiral tooth 22, the outer peripheral portion 23, the moving plate body 31 and the moving spiral tooth 32. A first flow channel 24 is formed on the stationary plate body 21 and the outer peripheral portion 23. The outlet end of the first flow channel 24 communicates with the compression chamber. The inlet end of the first flow channel 24 penetrates the lower bottom wall of the outer peripheral portion 23. The first flow channel 24 is used to transport the enthalpy-increasing fluid into the compression chamber.

[0049] The scroll compressor is provided with the first flow channel 24 on the stationary plate body 21 and the outer peripheral portion 23, and the enthalpy-increasing fluid is transported into the compression chamber through the first flow channel 24, so that the working performance of the scroll compressor can be effectively improved.

[0050] Among them, compared with the prior art, the inlet end of the first flow channel 24 of the scroll compressor penetrates the lower bottom wall of the outer peripheral portion 23, so that the position where the enthalpy-increasing gas flows into the first flow channel 24 is at the height position of the lower bottom wall of the outer peripheral portion 23, so that the inlet end of the first flow channel 24 is closer to the bottom of the scroll compressor. Therefore, during the process of injecting enthalpy into the scroll compressor, the risk of cracks or even fractures in the pipeline for transporting the enthalpy-increasing gas to the first flow channel 24 caused by the vibration caused by the operation of the scroll compressor can be effectively reduced, so that the working performance of the scroll compressor can be further improved, the maintenance frequency of the pipeline for transporting the enthalpy-increasing gas to the first flow channel 24 can be reduced, and the service life of the pipeline for transporting the enthalpy-increasing gas to the first flow channel 24 can be extended.

[0051] Secondly, by setting the inlet end of the first flow channel 24 to penetrate through the lower bottom wall of the outer peripheral portion 23, the distance between the inlet end and the outlet end of the first flow channel 24 is increased, and the path for the enthalpy-increasing gas to flow into the compression chamber through the first flow channel 24 becomes longer. During the process of injecting enthalpy into the scroll compressor, the pressure fluctuation of the enthalpy-increasing gas can be effectively buffered, thereby further improving the working performance of the scroll compressor.

[0052] Therefore, the scroll compressor has good working performance; secondly, the risk of cracks or even fractures in the pipeline for delivering the enthalpy-increasing gas to the first flow channel 24 is low, and the maintenance frequency is low, effectively extending the service life of the pipeline.

[0053] It can be understood that, as Figure 1 and Figure 2 shown, the lower bottom wall of the outer peripheral portion 23 is located below the lower bottom wall of the stationary disk body 21.

[0054] Specifically, in this embodiment, the outlet end of the first flow channel 24 communicates with the medium-pressure section of the compression chamber. In other embodiments, the outlet end of the first flow channel 24 can also be set to communicate with the high-pressure section of the compression chamber. In other embodiments, the outlet end of the first flow channel 24 can also be provided with two sub-outlet ends, one sub-outlet end communicates with the medium-pressure section of the compression chamber, and the other sub-outlet end communicates with the high-pressure section of the compression chamber.

[0055] Specifically, in this embodiment, as Figures 1 to 3 shown, the pipeline for delivering the enthalpy-increasing gas to the first flow channel 24 is the first pipeline 51.

[0056] Specifically, the stationary scroll disk 2 is fixedly arranged in the housing 1. Or, the stationary scroll disk 2 is axially floatingly arranged in the housing 1. It can be understood that the above scroll compressor can be either a scroll compressor with the stationary scroll disk 2 fixedly arranged or a scroll compressor with the stationary scroll disk 2 axially floatingly arranged.

[0057] Among them, as Figure 1 and Figure 2 shown, the scroll compressor further includes a bearing seat 4 fixedly arranged in the housing 1, and the bearing seat 4 is located between the stationary scroll disk 2 and the moving scroll disk 3. It can be understood that the height direction of the scroll compressor, the axial direction of the stationary scroll disk 2, the axial direction of the moving scroll disk 3, and the axial direction of the bearing seat 4 are all parallel.

[0058] Optionally, in this embodiment, as Figures 1 to 3 shown, the bearing seat 4 is provided with a second flow channel 411, the outlet end of the second flow channel 411 is hermetically communicated with the inlet end of the first flow channel 24, and the inlet end of the second flow channel 411 is used for introducing the enthalpy-increasing fluid.

[0059] The enthalpy-increasing gas flows through the second flow channel 411 and the first flow channel 24 in sequence and then flows into the compression chamber. Specifically, the pipeline for delivering the enthalpy-increasing gas to the first flow channel 24 first delivers the enthalpy-increasing gas to the second flow channel 411, and the gas flows from the second flow channel 411 to the first flow channel 24 and then from the first flow channel 24 to the compression chamber.

[0060] Such an arrangement makes the inlet end of the jet enthalpy-increasing channel formed by the first flow channel 24 and the second flow channel 411 closer to the bottom of the scroll compressor, thereby further reducing the risk of cracks or even fractures in the pipeline for delivering the enthalpy-increasing gas to the first flow channel 24. Secondly, such an arrangement makes the path for the enthalpy-increasing gas to flow into the compression chamber longer. During the process of jet enthalpy-increasing of the scroll compressor, the effect of buffering the pressure fluctuation of the enthalpy-increasing gas can be further improved, thereby further enhancing the working performance of the scroll compressor. Secondly, compared with the case where the outlet end of the second flow channel 411 is connected to the inlet end of the first flow channel 24 through a second pipeline, or the inlet end of the first flow channel 24 is directly provided with a third pipeline to deliver the enthalpy-increasing gas to the first flow channel 24, the size of the scroll compressor in its own height direction can be effectively reduced.

[0061] As an alternative solution, the outlet end of the second flow channel 411 is hermetically connected to the inlet end of the first flow channel 24 through a second pipeline. It can also achieve delivering the enthalpy-increasing gas to the first flow channel 24 and can effectively reduce the risk of cracks or even fractures in the second pipeline. Further optionally, the second pipeline is completely below the lower bottom wall of the outer peripheral part 23, or part of the second pipeline is below the lower bottom wall of the outer peripheral part 23.

[0062] As another alternative solution, a third pipeline is provided at the inlet end of the first flow channel 24. The third pipeline is hermetically connected to the first flow channel 24 and part of the third pipeline extends out of the outer peripheral wall of the housing 1. It can also achieve delivering the enthalpy-increasing gas to the first flow channel 24 and can effectively reduce the risk of cracks or even fractures in the third pipeline. Further optionally, the third pipeline is completely below the lower bottom wall of the outer peripheral part 23, or part of the third pipeline is below the lower bottom wall of the outer peripheral part 23.

[0063] Optionally, in this embodiment, as Figures 1 to 3As shown, on one side of the bearing housing 4 close to the outer peripheral portion 23, a plug 412 protrudes. The plug 412 is sealingly inserted into the inlet end of the first flow channel 24, and the outlet end of the second flow channel 411 penetrates through the plug 412. Or, on one side of the outer peripheral portion 23 close to the bearing housing 4, a plug 412 protrudes. The plug 412 is sealingly inserted into the outlet end of the second flow channel 411, and the inlet end of the first flow channel 24 penetrates through the plug 412. With such a setting, whether the stationary scroll disk 2 is fixed in the housing 1 or the stationary scroll disk 2 is floatingly arranged in the housing 1, the outlet end of the second flow channel 411 and the inlet end of the first flow channel 24 can be connected. Secondly, whether the stationary scroll disk 2 is fixed in the housing 1 or the stationary scroll disk 2 is floatingly arranged in the housing 1, the relative positions of the stationary scroll disk 2 and the bearing housing 4 can be defined by the plug 412. The functions of the plug 412 are integrated, and the structure of the scroll compressor can be simplified.

[0064] Further optionally, in this embodiment, the plug 412 is slidable along its own insertion direction. As Figures 1 to 3 shown, the insertion direction of the plug 412 is parallel to the axial direction of the bearing housing 4. With such a setting, it is applicable to a scroll compressor with the stationary scroll disk 2 fixed in the housing 1, and especially for the stationary scroll disk 2 floatingly arranged in the housing 1, it can not only connect the outlet end of the second flow channel 411 and the inlet end of the first flow channel 24, but also limit the stationary scroll disk 2 to float only up and down along its own axis, guide and limit the stationary scroll disk 2, and can further simplify the structure of the scroll compressor and reduce the processing cost.

[0065] In this embodiment, as Figure 1 and Figure 2 shown, a first sealing ring 91 is embedded in the outer peripheral wall of the plug 412.

[0066] For the case where the plug 412 protrudes on one side of the bearing housing 4 close to the outer peripheral portion 23, the first sealing ring 91 is clamped between the outer peripheral wall of the plug 412 and the inner peripheral wall of the first flow channel 24. For the case where the plug 412 protrudes on one side of the outer peripheral portion 23 close to the bearing housing 4, the first sealing ring 91 is clamped between the outer peripheral wall of the outer peripheral portion 23 and the inner peripheral wall of the second flow channel 411. To achieve the sealed connection between the inlet end of the first flow channel 24 and the outlet end of the second flow channel 411.

[0067] In other embodiments, for the plug 412 protruding from one side of the bearing seat 4 close to the outer peripheral portion 23, a first sealing ring 91 can also be embedded in the inner peripheral wall of the first flow channel 24, and the first sealing ring 91 is clamped between the outer peripheral wall of the plug 412 and the inner peripheral wall of the first flow channel 24. For the plug 412 protruding from one side of the outer peripheral portion 23 close to the bearing seat 4, a first sealing ring 91 can also be embedded in the inner peripheral wall of the second flow channel 411, and the first sealing ring 91 is clamped between the outer peripheral wall of the outer peripheral portion 23 and the inner peripheral wall of the second flow channel 411. It can also achieve the sealed connection between the inlet end of the first flow channel 24 and the outlet end of the second flow channel 411.

[0068] In this embodiment, as Figure 1 and Figure 2 shown, the first sealing ring 91 is arranged close to the free end of the plug 412 along the insertion direction. So that for the stationary scroll 2 fixed in the housing 1 or the stationary scroll 2 floatingly arranged in the housing 1, the first sealing ring 91 can always ensure the sealed connection between the inlet end of the first flow channel 24 and the outlet end of the second flow channel 411.

[0069] In this embodiment, as Figure 1 and Figure 2 shown, the number of the first sealing rings 91 is one. It can be understood that the number of the first sealing rings 91 can be adaptively adjusted according to the actual working conditions.

[0070] Among them, as Figures 1 to 3 shown, the scroll compressor further includes a first pipe 51 hermetically connected to the bearing seat 4 and partially extending out of the outer peripheral wall of the housing 1, and the outlet end of the first pipe 51 is hermetically connected to the inlet end of the second flow channel 411. When the enthalpy-increasing gas is conveyed to the first pipe 51, the enthalpy-increasing gas flows through the first pipe 51, the second flow channel 411 and the first flow channel 24 in sequence, and flows into the compression chamber. To achieve the ability to convey the enthalpy-increasing gas into the compression chamber.

[0071] Optionally, in this embodiment, as Figures 1 to 3 shown, the inlet end of the second flow channel 411 penetrates through the outer peripheral wall of the bearing seat 4 and is hermetically connected to the outlet end of the first pipe 51. That is, the inlet end of the second flow channel 411 is located between the upper top wall and the lower bottom wall of the bearing seat 4. It is convenient to arrange the first pipe 51, and compared with the inlet end of the second flow channel 411 penetrating through the lower bottom wall of the bearing seat 4, arranging the first pipe 51 will not increase the size of the scroll compressor in its own height direction.

[0072] In other embodiments, the inlet end of the second flow channel 411 can also penetrate through the lower bottom wall of the bearing housing 4 and be in sealed communication with the outlet end of the first pipeline 51. With such a setting, it can further make the inlet end of the jet enthalpy increase flow channel formed by the first flow channel 24 and the second flow channel 411 close to the bottom of the scroll compressor, thereby further reducing the risk of cracks or even fractures in the first pipeline 51.

[0073] Optionally, in this embodiment, as Figure 1 and Figure 2 shown, the first pipeline 51 is completely located below the lower bottom wall of the outer peripheral part 23. To further reduce the risk of cracks or even fractures in the first pipeline 51. In other embodiments, the first pipeline 51 is partially located below the lower bottom wall of the outer peripheral part 23.

[0074] Optionally, in this embodiment, as Figures 1 to 3 shown, an external thread is formed on the outer periphery of the first pipeline 51, and an internal thread is formed at the inlet end of the second flow channel 411, and the external thread is in threaded engagement with the internal thread. Further, a second sealing ring 92 is sleeved on the outer periphery of the first pipeline 51, and the second sealing ring 92 is axially located at one end of the external thread along the first pipeline 51 and is clamped between the outer peripheral wall of the first pipeline 51 and the inner peripheral wall of the second flow channel 411. To achieve sealed communication between the outlet end of the first pipeline 51 and the inlet end of the second flow channel 411. Further, the second sealing ring 92 is axially located at one end of the external thread along the first pipeline 51 and is arranged close to the output end of the first pipeline 51.

[0075] In other embodiments, the outlet end of the first pipeline 51 is press-fitted into the inlet end of the second flow channel 411. Or, the outlet end of the first pipeline 51 is inserted into the inlet end of the second flow channel 411, and the outer peripheral wall of the first pipeline 51 and the inner peripheral wall of the second flow channel 411 are sealed and welded by welding, etc. It is only necessary to achieve sealed communication between the outlet end of the first pipeline 51 and the inlet end of the second flow channel 411.

[0076] Among them, as Figures 1 to 3 shown, the scroll compressor further includes a pipe joint 52 located outside the housing 1, and the first end of the pipe joint 52 is hermetically sleeved on the outer periphery of the inlet end of the first pipeline 51. Specifically, the second end of the pipe joint 52 is used to communicate with the enthalpy-increasing gas source. To achieve the ability to transport enthalpy-increasing gas into the first pipeline 51.

[0077] In this embodiment, the first end of the pipe joint 52 is sleeved on the inlet end of the first pipeline 51 and is welded to both the first pipeline 51 and the housing 1. To achieve sealed communication between the first end of the pipe joint 52 and the inlet end of the first pipeline 51.

[0078] In this embodiment, as Figures 1 to 3As shown, a third sealing ring 93 is clamped between the inner peripheral wall of the first end of the pipe joint 52 and the outer peripheral wall of the first pipe 51, so as to further enhance the sealing connection effect between the first end of the pipe joint 52 and the inlet end of the first pipe 51.

[0079] Among them, as Figures 1 to 3 shown, the bearing housing 4 includes a housing body 41 and a thrust plate 42, and the housing body 41 and the thrust plate 42 are connected to form a bearing installation cavity. The scroll compressor further includes a bearing 10, the bearing 10 is located in the bearing installation cavity, and the outer ring of the bearing 10 is fixedly connected to the inner peripheral wall of the housing body 41. Further, in this embodiment, the second flow channel 411 and the insert block 412 are both arranged on the housing body 41.

[0080] Among them, as Figure 1 and Figure 2 shown, the scroll compressor further includes a silencing cover 7, the outer edge of the silencing cover 7 is hermetically connected to the inner peripheral wall of the housing 1 in the circumferential direction, and the interior of the housing 1 is divided into a high-pressure chamber 11 and a low-pressure chamber 12. The stationary scroll plate 2, the moving scroll plate 3, the bearing housing 4 and the bearing 10 are all located in the low-pressure chamber 12. The housing 1 is also provided with an inlet communicating with the low-pressure chamber 12 and an outlet communicating with the high-pressure chamber 11. Gas flows into the low-pressure chamber 12 from the inlet, and under the action of the pressure difference, the gas in the low-pressure chamber 12 automatically flows into the compression chamber formed by the moving scroll plate 3 and the stationary scroll plate 2, and after being compressed into high-pressure gas, it flows from the exhaust end of the stationary scroll plate 2 through the silencing cover 7 into the high-pressure chamber 11.

[0081] Among them, as Figure 2 shown, the scroll compressor further includes a buffer plugging member 6, the outer peripheral portion 23 is provided with a jack communicating with the first flow channel 24, and the buffer plugging member 6 is slidably and hermetically inserted into the jack; a first limiting surface 71 is fixedly arranged in the housing 1, and the buffer plugging member 6 can move in the direction of withdrawing from the first flow channel 24 along its sliding direction and abut against the first limiting surface 71. When the buffer plugging member 6 abuts against the first limiting surface 71, the buffer plugging member 6 is partially hermetically inserted into the jack.

[0082] During the process of performing jet enthalpy-increasing on the scroll compressor, with the pressure fluctuation of the gas in the jet enthalpy-increasing flow channel, the buffer plugging member 6 can slide relative to the jack to increase the volume of the jet enthalpy-increasing flow channel, so as to further buffer the pressure fluctuation of the gas in the jet enthalpy-increasing flow channel; secondly, especially for a scroll compressor in which the stationary scroll plate 2 is floatingly arranged in the housing 1, the functional integration of the buffer plugging member 6 can not only effectively buffer the pressure fluctuation of the gas in the jet enthalpy-increasing flow channel, but also effectively reduce the phenomenon that the stationary scroll plate 2 tilts and vibrates due to the uneven force caused by the acting force of the enthalpy-increasing gas.

[0083] The limiting structure can limit the buffer plugging member 6 to be always at least partially sealed and inserted into the jack. During the process of jet enthalpy increase of the scroll compressor, the leakage of the enthalpy-increasing gas can be effectively avoided.

[0084] It can be understood that the jack can be adaptively arranged on the outer peripheral part 23 and / or the stationary disk body 21 according to the actual working conditions and the spatial layout of the structure inside the housing 1.

[0085] Specifically, the first limiting surface 71 is fixedly arranged on the housing 1, including: the first limiting surface 71 is formed on the housing 1 itself; and / or, as Figure 2 shown, the first limiting surface 71 is formed on the sound insulation cover 7; and / or, a limiting block is fixedly connected inside the housing 1, and the first limiting surface 71 is the bottom wall of the limiting block, etc.

[0086] Specifically, as Figure 2 shown, a second limiting surface 231 is fixedly arranged inside the housing 1, and / or the stationary disk body 21 is provided with a second limiting surface 231, and / or the outer peripheral part 23 is provided with a second limiting surface 231; the buffer plugging member 6 can move in the direction of extending into the first flow channel 24 along its own sliding direction and abut against the second limiting surface 231. When the buffer plugging member 6 abuts against the second limiting surface 231, the buffer plugging member 6 does not block the first flow channel 24.

[0087] The first limiting surface 71 and the second limiting surface 231 cooperate to limit the sliding stroke of the buffer plugging member 6 along its own sliding direction, so that the buffer plugging member 6 is always at least partially sealed and inserted into the jack and does not block the first flow channel 24. Secondly, the first limiting surface 71 and the second limiting surface 231 cooperate, making it applicable to both the scroll compressor with the stationary scroll disk 2 fixedly arranged inside the housing 1 and the scroll compressor with the stationary scroll disk 2 floatingly arranged inside the housing 1, further improving the versatility.

[0088] It can be understood that the setting positions of the first limiting surface 71 and the second limiting surface 231 can be determined according to the spatial layout of the structure inside the housing 1, which can limit the sliding stroke of the buffer plugging member 6 along its own sliding direction, and make the buffer plugging member 6 always at least partially sealed and inserted into the jack without blocking the first flow channel 24.

[0089] Optionally, in this embodiment, as Figure 2As shown, the sliding direction of the buffer plug 6 is parallel to the axial direction of the stationary scroll disk 2. It can be understood that the jack is recessed downward along the upper top wall of the stationary scroll disk 2 and communicates with the first flow channel 24. The first limiting surface 71 and the second limiting surface 231 are spaced apart along the height direction of the scroll compressor, and the second limiting surface 231 is closer to the bearing seat 4 than the first limiting surface 71 along the height direction of the scroll compressor, that is, the second limiting surface 231 is located below the first limiting surface 71. Such a setting facilitates the arrangement of the buffer plug 6 and subsequent maintenance or even replacement of the buffer plug 6; secondly, compared with the case where the sliding direction of the buffer plug 6 is not parallel to the height direction of the scroll compressor, it is convenient to form the first flow channel 24 on the stationary scroll disk 2, that is, the jack is used as a process hole for machining the first flow channel 24 during the production stage.

[0090] In this embodiment, as Figure 2 shown, preferably, the first limiting surface 71 is the lower end surface of the silencing cover 7, and the second limiting surface 231 is the upper top wall of the outer peripheral portion 23. In this way, for a scroll compressor in which the stationary scroll disk 2 is fixedly arranged in the housing 1 or the stationary scroll disk 2 is floatingly arranged in the housing 1, the sliding stroke of the buffer plug 6 along its own sliding direction can be limited, and the buffer plug 6 is always at least partially inserted into the jack in a sealed manner without blocking the first flow channel 24; secondly, such a setting makes it unnecessary to additionally machine the structures of the housing 1, the silencing cover 7, and the stationary scroll disk 2, which is convenient for machining and manufacturing and has a low cost. Further, for the case where the stationary scroll disk 2 is floatingly arranged in the housing 1, preferably, the maximum insertion depth of the insertion block 412 > the maximum floating amount of the stationary scroll disk 2 along its own axial direction. In this way, for the case where the stationary scroll disk 2 is floatingly arranged in the housing 1, during the process of injecting enthalpy into the scroll compressor, leakage at the connection between the first flow channel 24 and the second flow channel 411 can be further avoided. It can be understood that for the case where the stationary scroll disk 2 is fixedly arranged in the housing 1, the insertion depth of the insertion block 412 remains unchanged, and based on the sealing function of the first sealing ring 91, the outlet end of the second flow channel 411 and the inlet end of the first flow channel 24 are always effectively sealed and connected.

[0091] In this embodiment, as Figure 1 and Figure 2 shown, the first flow channel 24 includes a first input flow channel section 241, a buffer flow channel section 242, and a first output flow channel section 243 that are sequentially connected. The inlet end of the first input flow channel section 241 penetrates the lower bottom wall of the outer peripheral portion 23, and the outlet end of the first output flow channel section 243 communicates with the compression chamber. The jack communicates with the buffer flow channel section 242.

[0092] Optionally, as Figure 1 and Figure 2As shown, the minimum flow cross-sectional area of the buffer flow channel section 242 > the maximum flow cross-sectional area of the first input flow channel section 241, and / or, the minimum flow cross-sectional area of the buffer flow channel section 242 > the maximum flow cross-sectional area of the first output flow channel section 243. Specifically, the inlet end of the first input flow channel section 241 communicates with the outlet end of the second flow channel 411. With such a setting, when the buffer flow channel section 242 is used in cooperation with the buffer plug 6 during the process of jet enthalpy increase of the scroll compressor, the pressure fluctuation effect of the gas in the buffer jet enthalpy increase flow channel can be further improved, and the phenomenon that the stationary scroll disk 2 tilts and vibrates due to uneven force caused by the force exerted by the enthalpy-increasing gas can be further reduced.

[0093] In this embodiment, as Figure 1 and Figure 2 shown, it is preferred that the minimum flow cross-sectional area of the buffer flow channel section 242 > the maximum flow cross-sectional area of the first input flow channel section 241, and the minimum flow cross-sectional area of the buffer flow channel section 242 > the maximum flow cross-sectional area of the first output flow channel section 243.

[0094] In this embodiment, as Figures 1 to 3 shown, it is exemplary that the second flow channel 411 includes a second input flow channel section 4111 and a second output flow channel section 4112 that are vertically connected. The second input flow channel section 4111 is hermetically connected to the first pipe 51, and the second output flow channel section 4112 is hermetically connected to the first input flow channel section 241. It can be understood that the shape of the second flow channel 411 can also be adjusted adaptively according to the actual working conditions.

[0095] Among them, as Figure 2 shown, the scroll compressor further includes a fourth sealing ring 94, and the fourth sealing ring 94 is clamped between the outer peripheral wall of the buffer plug 6 and the inner peripheral wall of the jack. To achieve that the buffer plug 6 is slidably and hermetically inserted into the jack, and to prevent the enthalpy-increasing gas from leaking through the gap between the outer peripheral wall of the buffer plug 6 and the inner peripheral wall of the jack.

[0096] For the fourth sealing ring 94 embedded in the outer peripheral wall of the buffer plug 6, it is preferred that the fourth sealing ring 94 is located at one end of the buffer plug 6 close to the buffer flow channel section 242. For the fourth sealing ring 94 embedded in the inner peripheral wall of the jack, it is preferred that the fourth sealing ring 94 is located at one end of the jack far from the buffer flow channel section 242. To ensure that the fourth sealing ring 94 can always seal the gap between the outer peripheral wall of the buffer plug 6 and the inner peripheral wall of the jack.

[0097] In this embodiment, the number of the fourth sealing rings 94 is one. It can be understood that the number of the fourth sealing rings 94 can be adjusted adaptively according to the actual working conditions.

[0098] Optionally, the buffer plug 6 is an elastic plug made of an elastic material such as rubber. It can further enhance the purpose of buffering the pressure fluctuation of the gas in the jet-assisted enthalpy-increasing flow channel. Further, the outer diameter of the buffer plug 6 is greater than the inner diameter of the through hole. It can further prevent the gas in the jet-assisted enthalpy-increasing flow channel from leaking.

[0099] As an alternative, the buffer plug 6 can also be made of plastic, copper, aluminum, steel, alloy, etc.

[0100] Optionally, in this embodiment, as Figure 2 shown, a guiding surface 61 is provided at one end of the buffer plug 6 close to the buffer flow channel section 242. The guiding surface 61 is used to guide the buffer plug 6 to slide and insert into the jack. It can improve the assembly efficiency. Further optionally, a third limiting surface is formed at one end of the inner peripheral wall of the jack close to the buffer flow channel section 242. The guiding surface 61 can abut against the third limiting surface along the sliding direction of the buffer plug 6. To further prevent the buffer plug 6 from blocking the first flow channel 24. Further optionally, the third limiting surface is manufactured conformally. In other words, the shape of the third limiting surface is the same as the shape of the guiding surface 61. When the guiding surface 61 abuts against the third limiting surface along the sliding direction of the buffer plug 6, it can further prevent the enthalpy-increasing gas from leaking through the gap between the outer peripheral wall of the buffer plug 6 and the inner peripheral wall of the jack.

[0101] Specifically, in this embodiment, when the guiding surface 61 abuts against the third limiting surface along the sliding direction of the buffer plug 6, the buffer plug 6 abuts against the second limiting surface 231.

[0102] Optionally, in this embodiment, as Figure 2 shown, a process hole is recessed in the outer peripheral wall of the outer peripheral part 23. The process hole extends along the radial direction of the outer peripheral part 23 and communicates with the first flow channel 24; the scroll compressor further includes a sealing plate 8, and the sealing plate 8 is detachably and sealingly connected to the outer periphery of the outer peripheral part 23 and blocks the process hole. By providing the process hole, it is convenient to form the first flow channel 24 on the stationary scroll 2 and convenient to maintain and repair the stationary scroll 2 through the process hole; secondly, setting the sealing plate 8 to seal the process hole on the stationary scroll 2 can further prevent the enthalpy-increasing gas from leaking.

[0103] Specifically, as Figure 2 shown, the scroll compressor further includes a fifth sealing ring 95. The fifth sealing ring 95 is clamped between the sealing plate 8 and the outer peripheral part 23, and the fifth sealing ring 95 is arranged around the outer periphery of the process hole. The fifth sealing ring 95 is used to seal the gap between the sealing plate 8 and the stationary scroll 2.

[0104] Preferably, the sealing plate 8 is manufactured conformally. In other words, at least the shape of the end face of the sealing plate 8 near the outer peripheral portion 23 is the same as the shape of the outer peripheral local area of the outer peripheral portion 23 where the process holes are provided. This is to further improve the sealing effect of the gap between the sealing plate 8 and the stationary scroll plate 2, and to minimize the volume of the sealing plate 8, facilitating the structural layout and assembly and disassembly within the housing 1.

[0105] Among them, the scroll compressor further includes a driving motor, which is fixedly arranged within the housing 1, fixedly passes through the inner ring of the bearing 10, and is connected to the moving scroll plate 3. The driving motor can drive the moving scroll plate 3 to engage with the stationary scroll plate 2. Thus, under the action of the pressure difference, the gas in the low-pressure chamber 12 can automatically flow into the compression chamber formed by the moving scroll plate 3 and the stationary scroll plate 2, and after being compressed into high-pressure gas, it flows from the exhaust end of the stationary scroll plate 2 through the silencing cover 7 into the high-pressure chamber 11.

[0106] Specifically, the specific structure of the stationary scroll plate 2 fixedly arranged within the housing 1 is as follows: the stationary scroll plate 2 is directly fixedly connected to the housing 1; or, the stationary scroll plate 2 is directly fixedly connected to the bearing seat 4, and the bearing seat 4 is directly fixedly connected to the housing 1; or, the stationary scroll plate 2 is directly fixedly connected to the bearing seat 4, and the bearing seat 4 is fixedly connected to the housing 1 through other structures within the housing 1. Further, the ways of fixed connection include but are not limited to screw connection, welding, bolt and nut mating connection, etc.

[0107] Among them, the specific structure of the stationary scroll plate 2 floatingly arranged within the housing 1 belongs to the prior art and will not be elaborated here. The specific structures of the housing 1, the moving scroll plate 3, the bearing seat 4, the silencing cover 7, and the driving motor all belong to the prior art, so they will not be elaborated here.

[0108] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A scroll compressor, comprising a housing (1), a stationary scroll plate (2) and a moving scroll plate (3) located within the housing (1); the stationary scroll plate (2) includes a stationary plate body (21), stationary scroll teeth (22) connected to the lower bottom wall of the stationary plate body (21), and an outer peripheral portion (23) connected to the outer periphery of the stationary plate body (21) and located outside the stationary scroll teeth (22); the moving scroll plate (3) includes a moving plate body (31) and moving scroll teeth (32) connected to the lower bottom wall of the moving plate body (31); a compression chamber is formed among the stationary plate body (21), the stationary scroll teeth (22), the outer peripheral portion (23), the moving plate body (31) and the moving scroll teeth (32); characterized in that: A first flow channel (24) is formed on the stationary plate body (21) and the outer peripheral portion (23), an outlet end of the first flow channel (24) communicates with the compression chamber, an inlet end of the first flow channel (24) penetrates through the lower bottom wall of the outer peripheral portion (23), and the first flow channel (24) is used for delivering an enthalpy-increasing fluid into the compression chamber.

2. The scroll compressor according to claim 1, characterized in that, The scroll compressor further includes a bearing seat (4) fixedly arranged within the housing (1), and the moving scroll plate (3) is located between the stationary scroll plate (2) and the bearing seat (4); the bearing seat (4) is provided with a second flow channel (411), an outlet end of the second flow channel (411) is hermetically communicated with an inlet end of the first flow channel (24), and an inlet end of the second flow channel (411) is used for introducing the enthalpy-increasing fluid.

3. The scroll compressor according to claim 2, wherein, A plug block (412) protrudes from a side of the bearing seat (4) close to the outer peripheral portion (23), and the plug block (412) is hermetically inserted into an inlet end of the first flow channel (24), and an outlet end of the second flow channel (411) penetrates through the plug block (412); Or, a plug block (412) protrudes from a side of the outer peripheral portion (23) close to the bearing seat (4), and the plug block (412) is hermetically inserted into an outlet end of the second flow channel (411), and an inlet end of the first flow channel (24) penetrates through the plug block (412).

4. The scroll compressor according to claim 3, characterized in that: The plug block (412) is slidable along its insertion direction; And / or, the insertion direction of the plug block (412) is parallel to the axial direction of the bearing seat (4).

5. The scroll compressor according to claim 2, characterized in that The scroll compressor further includes a first pipe (51) hermetically connected to the bearing seat (4) and partially protruding from the outer peripheral wall of the housing (1), and an outlet end of the first pipe (51) is hermetically communicated with an inlet end of the second flow channel (411); the enthalpy-increasing fluid can flow through the first pipe (51), the second flow channel (411) and the first flow channel (24) in sequence and flow into the compression chamber.

6. The scroll compressor according to any one of claims 1-5, characterized in that, The scroll compressor further includes a buffer plugging member (6), the outer peripheral portion (23) is provided with a jack communicating with the first flow channel (24), and the buffer plugging member (6) is slidably and hermetically inserted into the jack; A first limiting surface (71) is fixedly arranged inside the housing (1). The buffer plugging member (6) can move in the direction of exiting the first flow channel (24) along its sliding direction and abut against the first limiting surface (71). When the buffer plugging member (6) abuts against the first limiting surface (71), the buffer plugging member (6) is partially inserted into the jack in a sealed manner.

7. The scroll compressor according to claim 6, characterized in that, A second limiting surface (231) is fixedly arranged inside the housing (1), and / or the stationary scroll body (21) is provided with a second limiting surface (231), and / or the outer peripheral portion (23) is provided with a second limiting surface (231); The buffer plugging member (6) can move in the direction of extending into the first flow channel (24) along its sliding direction and abut against the second limiting surface (231). When the buffer plugging member (6) abuts against the second limiting surface (231), the buffer plugging member (6) does not block the first flow channel (24).

8. The scroll compressor according to claim 6, characterized in that, The sliding direction of the buffer plugging member (6) is parallel to the axial direction of the stationary scroll (2); and / or, The first flow channel (24) includes a first input flow channel section (241), a buffer flow channel section (242), and a first output flow channel section (243) that are sequentially connected. The inlet end of the first input flow channel section (241) penetrates the lower bottom wall of the outer peripheral portion (23). The outlet end of the first output flow channel section (243) communicates with the compression chamber. The jack communicates with the buffer flow channel section (242); The minimum flow cross-sectional area of the buffer flow channel section (242) > the maximum flow cross-sectional area of the first input flow channel section (241), and / or, the minimum flow cross-sectional area of the buffer flow channel section (242) > the maximum flow cross-sectional area of the first output flow channel section (243).

9. The scroll compressor according to any one of claims 1-5, characterized in that, A process machining hole is recessed in the outer peripheral wall of the outer peripheral portion (23). The process machining hole extends along the radial direction of the outer peripheral portion (23) and communicates with the first flow channel (24); The scroll compressor further includes a sealing plate (8). The sealing plate (8) is detachably and sealingly connected to the outer periphery of the outer peripheral portion (23) and plugs the process machining hole.

10. The scroll compressor according to any one of claims 1-5, characterized in that: The stationary scroll (2) is fixedly arranged inside the housing (1); or, The stationary scroll (2) is floatingly arranged inside the housing (1) along its own axial direction.

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