Scroll compressor

Abstract

The utility model provides a kind of scroll compressor, it includes fixed scroll and jet augmenting assembly, jet augmenting assembly includes liftable sealing component, injection assembly and control assembly.The communication groove with injection hole is set on fixed scroll, control assembly can be actuated to make liftable sealing component move between opening position and closed position, to close and open injection hole by liftable sealing component as needed, to change the communication state of communication groove, injection hole and compression cavity in this way.In this way, injection hole for EVI function can be arranged on fixed scroll in relatively unrestricted and flexible manner, in more number, to improve EVI effect, to improve the working efficiency of compressor further, and the processing difficulty of this communication groove and injection hole is also relatively lower.In addition, for the case of not enabling EVI function, since communication groove and injection hole are filled by liftable sealing component, clearance volume is basically eliminated.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and more specifically to a scroll compressor that can effectively improve the jet enthalpy enhancement effect and significantly reduce the clearance volume during compression when the jet enthalpy enhancement function is not enabled. Background Technology

[0002] The content in this section provides only background information related to this disclosure and may not constitute prior art.

[0003] To achieve high efficiency in scroll compressors, especially in low-temperature environments, an enhanced vapor injection (EVI) system is typically installed in the compressor. Compared to ordinary scroll compressors, this system mainly involves adding a second suction port to the compressor to supply refrigerant fluid (eVI fluid) to the compression chamber. This increases the refrigerant flow rate in the main cycle and widens the enthalpy difference of the refrigerant in the main cycle, thereby improving the compressor's cooling or heating efficiency and achieving high energy efficiency.

[0004] In related technologies, to achieve the vapor injection enthalpy enhancement function, a slender transverse orifice and an injection orifice communicating with the transverse orifice are typically arranged on the fixed scroll component of the scroll compressor. When the EVI function is activated, the refrigerant injected through the second suction port can enter the compression chamber through the transverse orifice and the injection orifice.

[0005] However, without the EVI function enabled, the aforementioned transverse orifices and injection orifices create a large clearance volume (or dead volume). Since they are constantly connected to the compression chamber, fluid interaction occurs between them during compression, leading to reduced compression efficiency. Furthermore, the elongated transverse orifices make machining very difficult, and the connection between the transverse orifices and injection orifices restricts the arrangement of the injection orifices on the fixed vortex component. Therefore, it is impossible to effectively improve the jet enthalpy enhancement effect by arranging a large number of injection orifices.

[0006] Therefore, it is necessary to improve the jet enthalpy enhancement structure of the scroll compressor to effectively improve the jet enthalpy enhancement effect while effectively reducing the clearance volume during the compression process when the jet enthalpy enhancement function is not enabled. Utility Model Content

[0007] One objective of this invention is to provide a scroll compressor that can improve the jet enthalpy enhancement effect and significantly reduce the clearance volume during the compression process when the jet enthalpy enhancement function is not enabled.

[0008] Another objective of this invention is to enable the use of the adjustable regulating component and regulating valve originally installed in the two-stage scroll compressor for changing the compressor capacity to realize the adjustable sealing component and control assembly for the EVI function, without making significant structural adjustments to the scroll compressor, thus greatly saving design and manufacturing costs.

[0009] Another objective of this invention is to improve the EVI effect by easily setting two or more sets of injection holes at the connecting groove to more accurately inject refrigerant fluid into different compression chambers or to inject more refrigerant fluid.

[0010] In view of this, embodiments of this application provide a scroll compressor, which includes a compression mechanism with a fixed scroll member and a jet enthalpy enhancement assembly. The jet enthalpy enhancement assembly is used to inject jet enthalpy-enhancing fluid into the compression chamber of the compression mechanism in a controlled manner. The fixed scroll member includes an end plate, a connecting groove is provided at the end plate, and an injection hole is opened at the bottom of the connecting groove to connect the connecting groove and the compression chamber. The jet enthalpy enhancement assembly includes a liftable sealing member, an injection assembly, and a control assembly. The injection assembly is used to transport jet enthalpy-enhancing fluid from outside the scroll compressor to the connecting groove. The liftable sealing member is configured to move between an open position and a closed position under the action of the control assembly. When in the open position, the liftable sealing member moves away from the bottom of the connecting groove and opens the injection hole, so that the connecting groove is fluidly connected to the compression chamber through the injection hole. When in the closed position, the liftable sealing member moves to fill the connecting groove and contact the bottom of the connecting groove to close the injection hole, so that the connecting groove is fluidly isolated from the compression chamber.

[0011] In some embodiments, the scroll compressor is provided with a liftable modulating component including an inner ring, the lower portion of which constitutes a liftable sealing component and is sized such that when in a closed position, it can fill the communication groove and contact the bottom of the communication groove, and when in an open position, the lower end surface of the lower portion of the inner ring forms a sealed fluid passage with the communication groove.

[0012] In some embodiments, the inner ring portion is provided with a first seal on both the inner and outer sides.

[0013] In some embodiments, the height-adjustable modulation component further includes an outer ring portion and a circular ring portion, the circular ring portion having an inner circumferential edge and an outer circumferential edge, the inner ring portion extending axially from the inner circumferential edge, and the outer ring portion extending axially from the outer circumferential edge.

[0014] In some embodiments, the upper portions of the outer ring, circular ring, and inner ring of the liftable modulation member define an adjustment cavity to form part of a control assembly. The pressure within the adjustment cavity can be controlled to change, thereby enabling the liftable modulation member to move up and down, and thus enabling the lower portion of the inner ring constituting the liftable sealing member to move between an open position and a closed position.

[0015] In some embodiments, the control assembly further includes a regulating valve having a first port communicating with a low-pressure suction region of the scroll compressor, a second port communicating with a high-pressure discharge region of the scroll compressor, and a third port communicating with a regulating chamber. The third port is configured to selectively connect with either the first or the second port to change the pressure within the regulating chamber. When the third port is connected with the first port, under the action of a pressure difference, the liftable modulation component can be moved to a closed position, and when the third port is connected with the second port, under the action of a pressure difference, the liftable modulation component can be moved to an open position, causing the liftable sealing component to be in an open position.

[0016] In some embodiments, the injection holes include a first set of injection holes and a second set of injection holes arranged circumferentially along the end plate and spaced apart from each other, the first set of injection holes and the second set of injection holes leading to different compression chambers respectively.

[0017] In some embodiments, the connecting groove is configured as an annular groove extending along the entire circumference of the end plate, or the connecting groove is configured as a generally C-shaped groove extending along a portion of the circumference of the end plate.

[0018] In some embodiments, the radial dimension of the lower portion of the inner ring constituting the liftable sealing member is greater than the radial dimension of the upper portion of the inner ring.

[0019] In some embodiments, a jet enthalpy inlet and a jet enthalpy transverse hole capable of communicating with a connecting groove are further provided at the end plate of the fixed scroll component. The injection assembly includes an injection fitting at the jet enthalpy intake port attached to the housing of the scroll compressor and an injection pipe connecting the injection fitting and the jet enthalpy inlet. Thus, when the liftable sealing component is in the open position, the jet enthalpy fluid flows sequentially through the injection fitting, injection pipe, jet enthalpy inlet, jet enthalpy transverse hole, connecting groove and injection hole into the compression chamber.

[0020] This utility model provides a scroll compressor, including a fixed scroll component and an injection enthalpy enhancement assembly. The injection enthalpy enhancement assembly includes a liftable sealing component, an injection component, and a control component. The fixed scroll component is provided with a connecting groove and injection holes. The control component can be actuated to move the liftable sealing component between an open position and a closed position, thereby opening and closing the injection holes as needed by means of the liftable sealing component, thus changing the communication state between the connecting groove, the injection holes, and the compression chamber. In this way, the injection holes for the EVI function can be arranged on the fixed scroll component in a relatively unrestricted and flexible manner, thereby effectively improving the EVI effect and thus improving the working efficiency of the compressor. Furthermore, since the machining of long and thin horizontal holes is eliminated, the height of the fixed scroll component will not be undesirably increased, and the machining difficulty of the connecting groove and injection holes is relatively low. In the case where the EVI function is not enabled, since the connecting groove and injection holes near the compression chamber are filled and closed by the liftable sealing component, the clearance volume during the compression process is basically eliminated, avoiding the reduction in compression efficiency due to the presence of clearance volume. Furthermore, the liftable sealing component and control assembly for the EVI function in this application embodiment can be implemented using the liftable modulation component and regulating valve originally provided in the two-stage scroll compressor for changing the compressor capacity, without requiring significant structural adjustments to the scroll compressor, thus greatly saving design and manufacturing costs. Additionally, two or more sets of spaced-apart injection holes arranged circumferentially can be easily provided at the connecting slot, enabling more precise injection of refrigerant fluid into different compression chambers or the injection of more refrigerant fluid to further improve the EVI effect. Attached Figure Description

[0021] The features and advantages of embodiments of the present invention will become more readily understood from the following description with reference to the accompanying drawings. In the various drawings, identical or similar parts are indicated by the same reference numerals. In the drawings:

[0022] Figure 1 This is a cross-sectional view of the fixed scroll component of a scroll compressor in related technologies, wherein the end plate of the fixed scroll component is provided with a transverse hole and multiple injection holes that are in fluid communication with the transverse hole.

[0023] Figure 2 This is a partial longitudinal sectional view of a scroll compressor according to an embodiment of this application.

[0024] Figure 3 yes Figure 2 A longitudinal sectional view of the fixed vortex component in the image.

[0025] Figure 4 yes Figure 2 A top view of the fixed vortex component in the image.

[0026] Figure 5 yes Figure 2 Exploded view of the fixed vortex component, control assembly, and liftable sealing component.

[0027] Figure 6 It is a longitudinal sectional view of the assembled fixed vortex component and jet enthalpy enhancement assembly, wherein the liftable sealing component of the jet enthalpy enhancement assembly is in the open position.

[0028] Figure 7 It is a longitudinal sectional view of the assembled fixed vortex component and jet enthalpy enhancement assembly, wherein the liftable sealing component of the jet enthalpy enhancement assembly is in the closed position.

[0029] Figure 8 This is a schematic diagram of the structure of the adjustable modulation component according to an embodiment of this application. Detailed Implementation

[0030] The following description is exemplary in nature and is not intended to limit the present invention or its applications and uses. The various figures only schematically illustrate the concept and principles of embodiments of the present invention and do not necessarily show the specific dimensions and proportions of each embodiment. Certain parts of certain figures may be exaggerated to illustrate relevant details or structures of embodiments of the present invention.

[0031] In this document, when used, directional terms such as "above," "below," "top," "bottom," etc., are based on the orientation shown in the corresponding drawings or the relative orientation between structures when the product is typically arranged. However, in practical applications, these directional terms can be limited according to the actual situation. In this utility model, when used, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Figure 1 This is a cross-sectional view of the fixed scroll component 2 of a scroll compressor in the related art. The end plate of the fixed scroll component 2 is provided with multiple transverse holes (transverse channels) 21 for realizing the EVI function and multiple injection holes 22 communicating with the transverse holes 21. The supplemented refrigerant fluid can be delivered to the transverse holes 21 through the second suction port of the scroll compressor by means of the injection assembly, and then injected into the compression chamber through the injection holes 22.

[0033] However, a specific positional relationship is required between the injection hole 22 and the transverse hole 21 to achieve fluid communication, thus demanding high machining precision and presenting significant machining challenges. Furthermore, machining a suitable transverse hole requires a relatively thick fixed scroll component 2, which undesirably increases the overall height of the scroll compressor. In addition, regarding the use of the jet enthalpy enhancement function, if an attempt is made to further improve the EVI effect by increasing the number of injection holes, then in order to achieve fluid communication with the transverse hole, the additional injection holes must be arranged along a specific trajectory or even require forming transverse holes with a different orientation, such as... Figure 1 As shown, the arrangement of the injection holes on the fixed scroll component is therefore very limited, resulting in low space utilization. In this way, only a small number of injection holes can be added to the fixed scroll component, thus failing to significantly improve the EVI effect, and the added injection holes are also difficult to machine. On the other hand, when the jet enthalpy enhancement function is not used, the transverse hole 21 and the injection hole 22 will form a large clearance volume during compression. Since they are always connected to the compression chamber, there will be fluid interaction between them during compression, leading to a significant reduction in compression efficiency.

[0034] Therefore, this application provides a scroll compressor that can effectively improve EVI performance and significantly reduce clearance volume during compression. The following will be combined with... Figures 2 to 8 The structure of the scroll compressor will be described in detail below.

[0035] Figure 2 This is a longitudinal sectional view of the scroll compressor 1 according to an embodiment of this application. Figure 2 As shown, the scroll compressor 1 includes a fixed scroll element 11, a moving scroll element (not shown in the figure), and a jet enthalpy enhancement assembly 12. The fixed scroll element 11 and the moving scroll element constitute the compression mechanism of the scroll compressor 1. Each of the fixed scroll element 11 and the moving scroll element includes a helical scroll, which together define a series of compression chambers 14 (e.g., ...). Figure 3 (As shown). The jet enthalpy enhancement assembly 12 is used to inject jet enthalpy enhancement fluid, i.e., refrigerant fluid, into the compression chamber 14 in a controlled manner to improve the operating efficiency of the compressor. It is understood that the scroll compressor 1 according to the embodiments of this application may also include other structures and / or components, but for clarity, only the structures and / or components related to the technical solutions of this application are mainly described herein.

[0036] Figure 3 This is a longitudinal sectional view of the fixed vortex member 11 according to an embodiment of this application. Figure 3 As shown, the fixed scroll member 11 also includes an end plate 111 and a hub 115 extending upward from the end plate 111. A communicating groove 112 for conveying fluid to the compression chamber 14 is provided at the end plate 111. Figure 3As shown, the connecting groove 112 can be provided on the upper surface of the end plate 111 and located radially outside the hub 115. Figure 4 This is a top view of the fixed vortex member 11 according to an embodiment of this application. Figure 3 and Figure 4 As shown, the connecting groove 112 can be configured to extend circumferentially along the end plate 111 and have a certain width (radial dimension) and depth (axial dimension). In some embodiments, the connecting groove 112 can extend along the entire circumference of the end plate 111, that is, it is substantially in the shape of a complete annulus, such as... Figure 4 As shown. In other embodiments, the connecting groove 112 may extend circumferentially along a portion of the end plate 111, i.e., in an arc shape, such as approximately C-shaped. A plurality of injection holes 113 are provided at the connecting groove 112, opening at the bottom of the connecting groove to achieve fluid communication with both the connecting groove 112 and the compression chamber 14, thereby injecting refrigerant fluid into the compression chamber 14. In this way, a large number of injection holes 113 can be arranged at the connecting groove 112 with relative flexibility and freedom, effectively improving the EVI effect, and the machining difficulty of the connecting groove 112 and the injection holes 113 is relatively low. Furthermore, it does not cause an undesirable increase in the height of the fixed scroll member 11. Furthermore, as... Figure 3 and Figure 6 As shown, a jet enthalpy inlet (not shown) and a jet enthalpy transverse hole D that can communicate with the connecting groove 112 are also provided at the end plate 111 of the fixed vortex component 11.

[0037] In particular, such as Figure 4 As shown, the connecting groove 112 is provided with a first set of injection holes 1131 and a second set of injection holes 1132 arranged circumferentially along the end plate 111 and spaced apart from each other. The first set of injection holes 1131 and the second set of injection holes 1132 lead to different compression chambers 14, so as to inject fluid into the corresponding compression chambers 14 more efficiently and accurately. As needed, the first set of injection holes 1131 and the second set of injection holes 1132 may include a number of injection holes, such as two, three, etc.

[0038] To achieve the supply of refrigerant fluid to the connecting tank 112, such as Figure 2 As shown, the jet enthalpy enhancement assembly 12 may include a jet assembly 122. The jet assembly 122 may include a jet fitting 127 attached to the second intake port B (jet enthalpy enhancement intake port) of the scroll compressor housing and a jet pipe 124 connecting the jet fitting 127 and the jet enthalpy enhancement inlet. The jet enthalpy enhancement fluid may flow sequentially through the jet fitting 127, the jet pipe 124, the jet enthalpy enhancement inlet, the jet enthalpy enhancement transverse orifice D, the connecting groove, and the jet orifice into the compression chamber.

[0039] To achieve the communication state between the control communication groove 112, the injection hole 113, and the compression chamber 14, the jet enthalpy enhancement assembly 12 also includes a liftable sealing component 121 and a control component 123 (see...). Figures 5 to 8 Under the control of the control component 123, the liftable sealing component 121 can move between the open position and the closed position to switch positions to meet different needs.

[0040] When in the open position, the liftable sealing member 121 moves away from the bottom of the connecting groove 112, causing the injection hole 113 to open, thereby establishing fluid communication between the injection hole 113 and the compression chamber 14. This allows the fluid injected by the injection pipe 124 to be injected into the compression chamber 14 via the connecting groove 112 and the injection hole 113. Specifically, when in the open position, the lower end surface of the liftable sealing member 121 defines a sealed fluid passage for fluid flow between itself and the connecting groove 112. Figure 6 The image shows the liftable sealing component 121 in the open position, with the EVI function activated. In this position, the injection pipe 124 injects fluid into the connecting groove 112, and the fluid is injected into the compression chamber 14 via multiple injection holes 113 on the connecting groove 112. When in the closed position, the liftable sealing component 121 moves to fill the connecting groove 112, thereby closing the injection holes 113 and isolating them from the fluid in the compression chamber 14. Figure 7 The image shows the liftable sealing member 121 in the closed position, completely filling the connecting groove 112. The lower end surface of the liftable sealing member 121 is in contact with the lower end surface of the connecting groove 112, and the EVI function is not enabled in this position. In this way, when the EVI function is not enabled, since the connecting groove 112 and the injection hole 113 are filled and closed by the liftable sealing member 121, the clearance volume can be essentially completely eliminated. Based on this, there is virtually no fluid interaction between the compression chamber 14 and the connecting groove 112 and the injection hole 113 during compression, thereby significantly improving the compression efficiency of the compressor.

[0041] In the case where the connecting groove 112 is constructed as an annular groove, the correspondingly liftable sealing member 121 can also be annular and sized to fit the annular groove, that is, it can completely fill the annular groove. The annular groove can be provided with the first set of injection holes 1131 and the second set of injection holes 1132 in the above embodiment.

[0042] In the case where the connecting groove 112 is constructed as a C-shaped groove, the corresponding liftable sealing member 121 can also be C-shaped and sized to fit the C-shaped groove, that is, it can completely fill the C-shaped groove. The C-shaped groove can also be provided with the first set of injection holes 1131 and the second set of injection holes 1132 in the above embodiment.

[0043] Specifically, in some embodiments, the scroll compressor 1 is modified from a two-stage scroll compressor. The scroll compressor 1 is equipped with a height-adjustable regulating component 15 (e.g., Figure 2 (as shown) and regulating valve AV (e.g., solenoid valve, such as Figure 5 As shown, a back pressure chamber (not shown) can be defined between the hub 115 and the adjustable height modulating component 15 to push the stationary scroll member 11 toward the moving scroll member. Under the action of the regulating valve AV, the adjustable height modulating component 15 can move up and down to open and close several bypass holes (bypass channels) located on the stationary scroll member 11, thereby controlling the communication state between the bypass holes and the compression chamber 14 to change the compressor capacity, thus realizing the full load and partial load operation of the scroll compressor. In this case, the original adjustable height modulating component 15 and regulating valve AV of the two-stage scroll compressor can realize the functions of the aforementioned adjustable height sealing component 121 and control component 123. That is to say, for the original two-stage scroll compressor, the communication state between the connecting groove 112 and the compression chamber 14 can be changed by means of the original structure or components, without making significant structural modifications to the compressor, thus greatly saving design and manufacturing costs.

[0044] Figure 8 This is a schematic diagram of the structure of the adjustable height modulated component 15 in a scroll compressor according to an embodiment of this application. Figure 8 As shown, the height-adjustable modulation component 15 may include an inner ring portion 151, an outer ring portion 152, and an annular portion 153 connecting the inner ring portion 151 and the outer ring portion 152. The annular portion 153 has an inner circumferential edge and an outer circumferential edge, wherein the inner circumferential edge defines a central aperture 154 for receiving the hub portion 115 of the fixed scroll member 11. The inner ring portion 151 is connected to the inner circumferential edge and extends axially from the inner circumferential edge, while the outer ring portion 152 is connected to the outer circumferential edge and extends axially from the outer circumferential edge. The inner ring portion 151 may include a lower portion 151A and an upper portion 151B, wherein the lower portion 151A serves as the aforementioned liftable sealing member 121, and the lower portion 151A is sized such that it can fill the connecting groove 112 when in the closed position, and when in the open position, the lower end surface of the lower portion 151A forms a sealed fluid channel with the connecting groove 112, so that fluid can be injected into the compression chamber 14 through the fluid channel and the injection hole 113. Specifically, the radial dimension of the lower portion 151A is larger than the radial dimension of the upper portion 151B to completely fill the connecting groove and close the injection hole. To further improve the sealing effect of the inner ring portion 151, such as... Figure 7 As shown, a first sealing element 114, such as a sealing ring, is provided on both the inner and outer sides of the inner ring portion 151 and the particularly underground portion 151A along the circumferential direction.

[0045] The adjustable modulation component 15 defines the adjustment cavity A. Specifically, as... Figure 7 As shown, the inner ring portion 151 (particularly the upper portion 151B of the inner ring portion 151), the annular portion 153, and the outer ring portion 152 define a channel with a generally U-shaped longitudinal cross-section. A second seal 16 is provided at the opening of this U-shaped channel to seal the U-shaped channel, thereby forming a regulating chamber A. The regulating valve AV is actuated to change the pressure in the regulating chamber A, thereby enabling the adjustable modulation component 15 to move between an open position and a closed position under the action of a pressure difference (e.g., the pressure difference between the pressure in the regulating chamber A and the pressure in the back pressure chamber).

[0046] In this embodiment, the upper portion 151B of the inner ring 151, the annular portion 153, the outer ring 152, the second seal 16, and the regulating valve AV are components of the control assembly 123. In this way, the control assembly 123 can control the movement of the liftable sealing member 121 between the open and closed positions.

[0047] As an exemplary structure of the regulating valve AV in a scroll compressor (not shown in the figure), the regulating valve AV has a first port connected to the low-pressure suction area of ​​the scroll compressor, a second port connected to the high-pressure discharge area of ​​the scroll compressor, and a third port connected to the regulating chamber A. The third port is selectively connected to either the first or the second port to change the pressure in the regulating chamber A. When the third port is connected to the first port, under the action of the pressure difference, the liftable modulation component 15 can move downward to put the liftable sealing component in a closed position, so that the liftable sealing component fills the connecting groove 112 and closes the injection hole 113, thereby isolating the injection hole 113 from the compression chamber 14. And when the third port is connected to the second port, under the action of the pressure difference, the liftable modulation component 15 can move upward to put the liftable sealing component in an open position, so that the liftable sealing component moves out of the connecting groove 112 and opens the injection hole 113, thereby connecting the injection hole 113 to the compression chamber 14.

[0048] It is understood that the liftable sealing component 121 and control component 123 in the embodiments of this application are also applicable to scroll compressors that are not two-stage scroll compressors (i.e., the scroll compressor of this application may not be based on a two-stage scroll compressor with a liftable modulation component). In this case, the liftable sealing component and injection component of the jet enthalpy enhancement assembly may have a structure similar to the liftable sealing component and injection component described above, while the control component may adopt other suitable structures (e.g., an electromagnetic coil connected to the liftable sealing component, which, for example, can cause the liftable sealing component to move downward when energized and to move upward when de-energized).

[0049] Although various embodiments of the present invention have been described in detail herein, it should be understood that the present invention is not limited to the specific embodiments described and shown herein, and any combination of the illustrated embodiments can be made where technically feasible. Other embodiments of the present invention will be conceived by those skilled in the art upon consideration of the specification and practice of the present invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed herein.

Claims

1. A scroll compressor, the scroll compressor comprising a compression mechanism having a fixed scroll element and a jet enthalpy enhancement assembly, the jet enthalpy enhancement assembly being used to inject jet enthalpy enhancement fluid into the compression chamber of the compression mechanism in a controlled manner. Its features are, The fixed vortex component includes an end plate, on which a connecting groove is provided and an opening at the bottom of the connecting groove is provided to connect the connecting groove with the injection hole of the compression chamber. The jet enthalpy enhancement assembly includes a liftable sealing component, a jetting component, and a control component. The injection assembly is used to deliver jet-enhanced enthalpy fluid from outside the scroll compressor to the connecting slot. The liftable sealing component is configured to move between an open position and a closed position under the action of the control component. When in the open position, the liftable sealing component moves away from the bottom of the communication groove to open the injection hole, so that the communication groove is in fluid communication with the compression chamber through the injection hole. When in the closed position, the liftable sealing component moves to fill the communication groove and contact the bottom of the communication groove to close the injection hole, so that the communication groove is fluidly isolated from the compression chamber.

2. The scroll compressor according to claim 1, characterized in that, The scroll compressor is equipped with a height-adjustable modulation component including an inner ring. The lower portion of the inner ring constitutes the liftable sealing component and is sized such that when in the closed position, it can fill the communicating groove and contact the bottom of the communicating groove, and when in the open position, the lower end surface of the lower portion of the inner ring forms a sealed fluid channel with the communicating groove.

3. The scroll compressor according to claim 2, characterized in that, The inner ring portion is provided with a first sealing element on both the inner and outer sides.

4. The scroll compressor according to claim 2, characterized in that, The height-adjustable modulation component also includes an outer ring and a circular ring. The annular portion has an inner circumferential edge and an outer circumferential edge, the inner annular portion extending axially from the inner circumferential edge, and the outer annular portion extending axially from the outer circumferential edge.

5. The scroll compressor according to claim 4, characterized in that, The upper portions of the outer ring, the circular ring, and the inner ring of the liftable modulating member define an adjustment cavity, which forms part of the control assembly. The pressure in the adjustment cavity can be controlled to change, thereby enabling the liftable modulating member to move up and down, and thus enabling the lower portion of the inner ring of the liftable sealing member to move between the open position and the closed position.

6. The scroll compressor according to claim 5, characterized in that, The control assembly further includes a regulating valve having a first port connected to a low-pressure suction region of the scroll compressor, a second port connected to a high-pressure discharge region of the scroll compressor, and a third port connected to the regulating chamber. The third port is configured to selectively connect with either the first port or the second port to change the pressure within the regulating chamber. When the third port is connected with the first port, under the action of a pressure difference, the liftable modulation component can move to the closed position of the liftable sealing component. When the third port is connected with the second port, under the action of a pressure difference, the liftable modulation component can move to the open position of the liftable sealing component.

7. The scroll compressor according to any one of claims 1 to 6, characterized in that, The injection holes include a first group of injection holes and a second group of injection holes arranged circumferentially along the end plate and spaced apart from each other, the first group of injection holes and the second group of injection holes leading to different compression chambers respectively.

8. The scroll compressor according to any one of claims 1 to 6, characterized in that, The connecting groove is configured as an annular groove extending along the entire circumference of the end plate, or The connecting groove is configured as a generally C-shaped groove extending circumferentially along a portion of the end plate.

9. The scroll compressor according to any one of claims 2 to 6, characterized in that, The radial dimension of the lower portion of the inner ring constituting the liftable sealing component is greater than the radial dimension of the upper portion of the inner ring.

10. The scroll compressor according to any one of claims 1 to 6, characterized in that, The end plate of the fixed vortex component is also provided with a jet enthalpy-increasing inlet and a jet enthalpy-increasing transverse hole that can communicate with the communicating groove. The injection assembly includes an injection fitting attached to the housing of the scroll compressor at the injection enthalpy inlet and an injection pipe connecting the injection fitting and the injection enthalpy inlet, whereby, when the liftable sealing component is in the open position, the injection enthalpy fluid flows sequentially through the injection fitting, the injection pipe, the injection enthalpy inlet, the injection enthalpy transverse hole, the communicating groove, and the injection hole into the compression chamber.

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