Scroll compressor

Abstract

This invention relates to a scroll compressor, comprising: a scroll element having a makeup gas inlet; and a jet enthalpy enhancement connection channel for communicating with a jet enthalpy enhancement fluid source and conveying fluid from the jet enthalpy enhancement fluid source to the makeup gas inlet of the scroll element. The jet enthalpy enhancement connection channel includes: a fluid input pipe for communicating with the jet enthalpy enhancement fluid source; a connecting plate for connecting the fluid input pipe and the scroll element, the connecting plate having a fluid input pipe connection port; and a transition cavity disposed on the peripheral wall of the connecting plate and / or the scroll element, comprising a fluid inlet for communicating with the fluid input pipe connection port and a fluid outlet for communicating with the makeup gas inlet. The transition cavity includes an opening of a predetermined length along the axial direction of the scroll compressor on either the fluid inlet side or the fluid outlet side. The scroll compressor according to the invention has lower requirements for the compressor housing in terms of axial height, is less prone to overlapping welding, and has less impact on the jet enthalpy enhancement fluid injection pressure, thus reducing fluid pressure loss.

Description

Technical Field

[0001] This disclosure relates to the field of compressors, and more specifically, to a scroll compressor including a jet enthalpy-increasing connection channel. Background Technology

[0002] This section provides background information relating to this disclosure, which does not necessarily constitute prior art.

[0003] Vapor injection enthalpy enhancement technology is widely used in compressors (such as scroll compressors). It injects a portion of intermediate-pressure gas into the compressor's compression chamber (specifically, the intermediate compression chamber) via a vapor injection enthalpy enhancement connection channel to mix with the partially compressed refrigerant and then compress it. This increases the refrigerant circulation volume and the enthalpy difference of the main circulation loop, thereby greatly improving the compressor's efficiency.

[0004] A jet enthalpy booster in a scroll compressor is a device used to inject fluid from a jet enthalpy booster fluid source (such as an economizer or flash tank) in the refrigerant circulation loop back into the scroll compressor chamber of the scroll compressor mechanism.

[0005] There are two main types of jet enthalpy enhancement devices for scroll compressors in related technologies. One type is the vertical type, where the connecting pipe between the injection pipe and the scroll compressor's gas inlet is installed in the same direction as the compressor's height (i.e., the axial direction). The jet enthalpy enhancement device (e.g., the injection pipe of the jet enthalpy enhancement device) is connected to the compressor's main bearing housing via a tapered thread. This method requires the use of bolt holes on the main bearing housing, reducing the number of scroll bolts and affecting the overall connection strength between the scroll and the main bearing housing. Furthermore, the flow path from the injection pipe to the scroll gas inlet involves multiple right-angle reversals, resulting in some pressure loss during injection. The other type is the horizontal type, where the connecting pipe is installed perpendicular to the compressor's height. Gas is directly injected into the scroll from the injection pipe through the connecting pipe without conversion or bends, thus avoiding pressure loss. Additionally, due to the short flow path, the impact on system performance is minimal in non-jet operating ranges. However, because the connecting pipe directly connects the injection pipe and the vortex air inlet, the vortex air inlet must be at the same height as the injection pipe. Often, the height of the vortex is almost the same as the upper surface of the cylindrical casing of the compressor, causing the welding position between the injection pipe and the cylindrical casing to be too close to the casing end. Simultaneously, the compressor's muffler cover also needs to be welded to the casing end, increasing the risk of overlapping welds. Overlapping welds refer to the welding position between the injection pipe and the casing being too close to the welding position between the muffler cover and the casing end. This causes the two welds to negatively impact each other. For example, if the circumferential welding of the injection pipe overlaps with the welding of the top cover of the muffler cover, the second weld will cause solder to pile up, resulting in uneven internal stress or increased residual stress in the solder, further leading to solder cracking and affecting weld strength. To avoid this risk, the muffler cover is often made very low (i.e., the muffler cover has a flatter shape), which affects the strength of the muffler cover. Summary of the Invention

[0006] This section provides a general summary of the disclosure, rather than a full disclosure of the entire scope or all features of the disclosure.

[0007] This disclosure provides a scroll compressor, particularly a scroll compressor including a jet enthalpy-enhancing connection channel, which can solve or mitigate at least one of the aforementioned problems in the related art.

[0008] In particular, one object of this disclosure is to provide a scroll compressor including a jet enthalpy-enhancing connection channel, which places lower requirements on the cylindrical housing body of the compressor housing in terms of axial height, is less prone to overlapping welding, and has less impact on the injection pressure of the jet enthalpy-enhancing fluid, thereby reducing fluid pressure loss.

[0009] According to a first aspect of the present invention, a scroll compressor is provided. The scroll compressor includes: a scroll element having a makeup gas inlet; and a jet enthalpy enhancement connection channel for communicating with a jet enthalpy enhancement fluid source and conveying fluid from the jet enthalpy enhancement fluid source to the makeup gas inlet of the scroll element. The jet enthalpy enhancement connection channel includes: a fluid input pipe for communicating with the jet enthalpy enhancement fluid source; a connecting plate for connecting the fluid input pipe and the scroll element, the connecting plate having a fluid input pipe connection port; the jet enthalpy enhancement connection channel further includes a transition cavity disposed on the peripheral wall of the connecting plate and / or the scroll element, the transition cavity including a fluid inlet and a fluid outlet, the fluid inlet communicating with the fluid input pipe connection port, and the fluid outlet communicating with the makeup gas inlet. The transition chamber includes an opening of a predetermined length along the axial direction of the scroll compressor on the fluid inlet side or the fluid outlet side, and the fluid input pipe connection or the gas supply inlet is configured to be in fluid communication with the transition chamber at any position within the opening range.

[0010] In the aforementioned scroll compressor, when the connecting plate is installed on the scroll compressor, the opening covers at least a portion of the fluid input pipe connection port or the gas injection inlet.

[0011] In the aforementioned scroll compressor, the longitudinal axis of the transition chamber is at an angle to the longitudinal axis of the compressor.

[0012] In the aforementioned scroll compressor, the angle is 2-5°.

[0013] In the aforementioned scroll compressor, the transition chamber is disposed on the connecting plate, and the opening of the transition chamber is located on the fluid outlet side, adapted to cover at least a portion of the make-up gas inlet.

[0014] In the aforementioned scroll compressor, the connecting plate is generally disc-shaped, and a sidewall defining the transition cavity is provided in the connecting plate, making the transition cavity longitudinally elongated.

[0015] In the aforementioned scroll compressor, the transition cavity is disposed on the outer peripheral wall of the scroll component, and the opening of the transition cavity is located on the fluid inlet side, adapted to cover at least a portion of the fluid input pipe connection port.

[0016] In the aforementioned scroll compressor, the fluid input pipe includes an injection pipe and a connecting pipe. The injection pipe is adapted to connect to the housing of the scroll compressor, and the connecting pipe is adapted to connect the injection pipe and the fluid input pipe connection port of the connecting plate.

[0017] In the aforementioned scroll compressor, the fluid input pipe connection port is provided with a stepped portion, and the connection pipe is adapted to abut against the stepped portion.

[0018] The scroll compressor described above also includes a one-way valve, which is adapted to be installed in the gas supply inlet.

[0019] The scroll compressor described above also includes a gasket, which is adapted to be disposed between the connecting plate and the scroll component.

[0020] In the aforementioned scroll compressor, the connecting pipe is constructed with both ends being approximately spherical, and the jet enthalpy-enhancing connecting channel also includes a plug arranged in the injection pipe for abutting the outer end of the connecting pipe.

[0021] In the aforementioned scroll compressor, the transition cavity is provided with a rounded transition section.

[0022] The scroll compressor disclosed herein can achieve at least the following beneficial effects:

[0023] In the scroll compressor according to embodiments of the present disclosure, the injection pipe is specifically connected to the scroll air inlet of the scroll compression mechanism via a connecting pipe and a connecting plate. Since the connecting plate and / or the scroll component of the scroll compressor has a transition cavity along the height direction of the compressor, the injection pipe and connecting pipe can be positioned below (particularly, slightly below) the scroll air inlet, avoiding the risk of overlapping welding that might occur if the injection pipe is too close to the shell end. Specifically, one side of the longitudinally elongated transition cavity is open, and this opening can be configured to have a predetermined length along the axial direction of the scroll compressor. Simultaneously, the fluid input pipe connection port or air inlet can be configured to be in fluid communication with the transition cavity at any position within the opening range, thus allowing the fluid input pipe, including the injection pipe and connecting pipe, to have a suitable range of free axial mounting positions relative to the scroll component. On the other hand, by using a roughly disc-shaped connecting plate instead of a tubular connector, fluid can flow into and out of the connecting plate substantially radially. Furthermore, by providing a transition cavity at an angle to the vertical direction with a rounded corner, pressure loss in the flow of the jet enthalpy-enhancing fluid from the injection pipe to the vortex inlet is reduced. Moreover, since the connecting plate ensures substantially radial flow into and out of the connecting plate, the jet enthalpy-enhancing connection channel no longer needs to be connected to the main bearing housing, thus avoiding any impact on the connection between the vortex component and the main bearing housing. Attached Figure Description

[0024] The accompanying drawings illustrate, by way of example only, some embodiments of the related technologies and the present invention, but the present invention is not limited to the embodiments shown in the drawings.

[0025] Figure 1 This is a schematic diagram of a portion of a compressor including a jet enthalpy-increasing connection channel according to a first embodiment of the present disclosure.

[0026] Figure 2 This is an exploded view of a portion of a compressor including a jet enthalpy-enhancing connection channel according to a first embodiment of the present disclosure, wherein the jet pipe is not shown.

[0027] Figure 3 This is a front view of the connecting plate according to the first embodiment of this disclosure.

[0028] Figure 4 for Figure 3 AA section view in the image.

[0029] Figure 5 This is a rear view of the connecting plate according to the first embodiment of this disclosure.

[0030] Figure 6 This is an exploded view of a portion of a compressor including a jet enthalpy-enhancing connection channel according to a second embodiment of the present disclosure, wherein the injection pipe is not shown.

[0031] Figure 7 This is a front view of the scroll component of a compressor according to the second embodiment of this disclosure.

[0032] Figure 8 for Figure 7 BB section view in the middle.

[0033] Figure 9 This is a front view of the connecting plate according to the second embodiment of this disclosure.

[0034] Figure 10 for Figure 9 CC section view in the image.

[0035] Figure 11 This is a schematic diagram of a portion of a compressor including a jet enthalpy-enhancing connection channel according to a preferred embodiment of the present disclosure. Detailed Implementation

[0036] The present disclosure will now be described in detail with reference to the accompanying drawings through exemplary embodiments. In several drawings, similar reference numerals denote similar parts and components. The following detailed description of the present disclosure is for illustrative purposes only and is not intended to limit the present disclosure or its application or use. The embodiments described in this specification are not exhaustive, but merely some of many possible embodiments. Exemplary embodiments may be implemented in many different forms and should not be construed as limiting the scope of the present disclosure. In some exemplary embodiments, well-known processes, well-known apparatus structures, and well-known techniques may not be described in detail.

[0037] The following will refer to Figures 1 to 5A first embodiment of a scroll compressor including a jet enthalpy-enhancing connection channel according to this disclosure is described. In the drawings, similar reference numerals denote similar parts and / or components.

[0038] Figure 1 A schematic diagram of a portion of a compressor 100 including a jet enthalpy-increasing connection channel according to a first embodiment of the present disclosure is shown. Figure 2 An exploded view of a portion of a compressor 100 including a jet enthalpy-enhancing connection channel according to a first embodiment of the present disclosure, wherein the jet pipe is not shown; Figure 3 This is a front view of the connecting plate according to the first embodiment of this disclosure; Figure 4 for Figure 3 AA section view in the middle; Figure 5 This is a rear view of the connecting plate according to the first embodiment of this disclosure.

[0039] See Figure 1 and Figure 2 The vapor injection enthalpy-enhancing connection channel is installed on the scroll member 40 (specifically, the fixed scroll) of the compressor for conveying vapor injection enthalpy-enhancing fluid from the refrigerant circulation loop to the scroll compression chamber of the scroll member 40 (specifically, the intermediate compression chamber with intermediate pressure).

[0040] Specifically, the jet enthalpy-enhancing connection channel may include a jet pipe 10, a connecting pipe 20, and a connecting plate 30 (according to this embodiment, the jet pipe 10 and the connecting pipe 20 constitute the fluid input pipe according to this application). It should be noted that "jet enthalpy-enhancing connection channel" is intended to represent an apparatus or structure, which may include physical components or a chamber defined by corresponding components. Jet enthalpy-enhancing fluid from the refrigerant circulation loop is injected into the scroll compressor chamber of the scroll compressor through the jet pipe 10, connecting pipe 20, and connecting plate 30. The outlet of the jet pipe 10 is connected to one end of the connecting pipe 20, and the other end of the connecting pipe 20 is connected to the connecting plate 30. The fluid enters the make-up gas inlet 41 of the scroll compressor chamber through the connecting plate 30. Figure 2 In the example shown, the connecting tube 20 is constructed in the shape of a dog bone with both ends being approximately spherical. Grooves for accommodating sealing rings may be provided at the two approximately spherical ends.

[0041] Furthermore, such as Figure 1 and Figure 2 As shown, the jet enthalpy enhancement connection channel also includes a plug 50, which is installed between the connecting pipe 20 and the injection pipe 10 to restrict the movement of the connecting pipe 20 in a direction perpendicular to the height of the compressor.

[0042] In this embodiment, such as Figures 3 to 5As shown, the connecting plate 30 is generally plate-shaped (specifically, roughly disk-shaped). The connecting plate 30 includes a fluid input pipe connection port 31 and a transition cavity 32 interconnected with each other. The transition cavity 32 includes a fluid inlet 321 and a fluid outlet 322. The fluid inlet 321 communicates with the fluid input pipe connection port 31, and the fluid outlet 322 communicates with the make-up air inlet 41. The transition cavity 32 includes an opening of a predetermined length along the axial direction of the scroll compressor on the fluid outlet 322 side. When the connecting plate 30 is installed on the scroll compressor, the opening covers at least a portion of the make-up air inlet 41. The fluid inlet 321 is located at the lower end of the transition cavity 32, and the center of the fluid outlet 322 is higher than the position of the fluid input pipe connection port 31. The fluid inlet 31 of the connecting plate 30 is connected to the connecting pipe 20, and the fluid outlet 322 of the connecting plate 30 is aligned with the air inlet 41 of the vortex compression chamber, so that the jet enthalpy-enhancing fluid from the jet pipe 10 enters the vortex compression chamber through the connecting pipe 20 and the connecting plate 30.

[0043] In the illustrated example, the connecting plate 30 is configured to have a recess, thereby providing sidewalls 32a defining two circumferential sides of the transition cavity 32 (see Figure 1). Figure 5 This makes the transition cavity 32 longitudinally elongated. Furthermore, the radially inner and radially outer portions of the transition cavity 32 are respectively formed by the corresponding portions of the outer periphery of the vortex member 40 and the bottom wall 32b of the recess of the connecting plate 30 (see...). Figure 4 The transition cavity 32 is reliably defined in this manner, allowing fluid to flow smoothly through the connecting plate 30 in a predetermined direction, and allowing the fluid inlet 31 of the connecting plate 30 to be axially offset (particularly, slightly offset) from the air inlet 41 of the vortex element, thereby appropriately lowering the connection position of the injection pipe 10 to the compressor housing.

[0044] It should be understood that the shape of the connecting plate 30 according to the embodiments of this disclosure is not limited to the disc shape shown in the drawings, but can be changed as needed, as long as the function of the connecting plate 30 can be realized. For example, the connecting plate 30 can be an elliptical plate or a square plate, etc.

[0045] In this embodiment, the connecting plate 30 is fixedly connected to the scroll member 40, for example, by bolts 60. Figure 2 As shown, bolt holes are provided at corresponding positions on the connecting plate 30 and the scroll member 40, and bolts 60 pass through the bolt holes on the connecting plate 30 and the scroll member 40 to connect the connecting plate 30 and the scroll member 40. In the example shown, a flat portion suitable for mounting the connecting plate 30 is provided on the outer periphery of the scroll member 40.

[0046] It should be understood that the connection method between the connecting plate 30 and the scroll member 40 according to the embodiments of this disclosure is not limited to the specific examples shown in the drawings or described herein, but can be changed as needed. For example, the connecting plate 30 and the scroll member 40 can be connected by welding.

[0047] In this embodiment, such as Figure 2 As shown, a gasket 70 is also provided between the connecting plate 30 and the vortex component 40 to prevent fluid leakage. The gasket 70 is fixed between the connecting plate 30 and the vortex component 40 by bolts 60, and the gasket 70 has a hole corresponding to the opening of the transition cavity 32.

[0048] like Figure 4 As shown, the fluid input pipe connection port 31 of the connecting plate 30 includes at least two coaxial first holes 311 and second holes 312. The second hole 312 is close to the transition cavity 32, and the inner diameter of the second hole 312 is smaller than the inner diameter of the first hole 311, thereby forming a step portion in the fluid input pipe connection port 31. One end of the connecting pipe 20 connected to the connecting plate 30 abuts against the step portion. On the one hand, this allows the connecting pipe 20 to extend into the fluid input pipe connection port 31, enabling the fluid at the outlet of the connecting pipe 20 to quickly reach the transition cavity 32. On the other hand, the abutment of the connecting pipe 20 against the step portion prevents the sealing ring in the groove at the end of the connecting pipe 20 from falling out and causing fluid leakage.

[0049] In this embodiment, such as Figure 4 As shown, the longitudinal axis of the transition chamber 32 and the longitudinal axis of the connecting plate 30 (the axial direction of the compressor) have an angle α greater than zero, and the upper end of the transition chamber 32 has a rounded transition, thereby allowing the jet enthalpy-enhancing fluid to be injected more smoothly into the vortex compression chamber. Furthermore, although not explicitly shown in the figures, it is conceivable that a rounded transition portion is provided between the transition chamber 32 and the fluid input pipe connection port 31 (i.e., the second hole 312). With rounded transition portions provided at the upper end of the transition chamber 32 and between the transition chamber 32 and the fluid input pipe connection port 31, the jet enthalpy-enhancing fluid can be injected more smoothly into the vortex compression chamber.

[0050] In a preferred embodiment of this disclosure, the angle α between the longitudinal axis of the transition cavity 32 and the longitudinal axis of the connecting plate 30 is 2-5°, preferably 3-4°. The inventors have found that if the angle is too large, the connecting plate will become too thick, while if the angle is too small, the guiding effect will be affected. By setting the angle in this way, and especially in coordination with the rounded transition portion at the inlet and / or the upper end, the jet enthalpy-enhancing fluid flows smoothly through the connecting plate, while avoiding undesirable thickening of the connecting plate.

[0051] In the jet enthalpy-enhancing connection channel according to the present disclosure, the jet pipe 10 is connected to the gas injection inlet 41 of the scroll compressor chamber via the connecting pipe 20 and the connecting plate 30. Since the connecting plate 30 is provided with a transition cavity 32 along the compressor height direction, the jet pipe 10 and the connecting pipe 20 can be positioned below the gas injection inlet 41, avoiding the risk of overlapping welding that might occur if the jet pipe 10 is too close to the shell end. On the other hand, the connection between the jet pipe 10 and the gas injection inlet 41 via the transition cavity 32, which is at a certain angle to the vertical direction and has a rounded transition portion, reduces the pressure loss of the jet enthalpy-enhancing fluid. It should be noted that, according to this application, since a connecting plate is used instead of the connecting pipe extending along the compressor axial direction and needing to connect to the main bearing housing as in related technologies, on the one hand, fluid still flows substantially radially into and out of the connecting plate; on the other hand, the jet enthalpy-enhancing connection channel no longer needs to be connected to the main bearing housing, which avoids occupying the bolt connection points of the main bearing housing and thus avoids affecting the bolt connection between the scroll component and the main bearing housing.

[0052] The following will refer to Figures 6 to 10 A second embodiment of the scroll compressor including a jet enthalpy-enhancing connection channel according to this disclosure will be described. Figures 6 to 10 In the figures, similar reference numerals as those above indicate similar parts and / or components.

[0053] Figure 6 An exploded view schematically shows a portion of a compressor 200 including a jet enthalpy-enhancing connection channel according to a second embodiment of the present disclosure, wherein the injection pipe 10 is not shown; Figure 7 A front view of the scroll member 240 of the compressor 200 according to the second embodiment of this disclosure; Figure 8 for Figure 7 BB section view in the middle; Figure 9 This is a front view of the connecting plate according to the second embodiment of this disclosure; Figure 10 for Figure 9 CC section view in the image.

[0054] The following will focus on describing the differences between this embodiment and the first embodiment, while the similarities will not be repeated.

[0055] like Figure 6 As shown, the vapor-injected enthalpy-enhancing fluid from the refrigerant circulation loop is injected into the scroll compressor chamber of the scroll compressor through the injection pipe 10 (not shown) via the connecting pipe 20 and the connecting plate 230. A gasket 70 is provided between the connecting plate 230 and the scroll component 240 to prevent fluid leakage.

[0056] like Figure 7 and Figure 8As shown, the scroll component 240 is provided with a transition cavity 232 along the height direction of the compressor, and the transition cavity 232 ends at the air supply inlet 241 of the scroll compression cavity. The transition cavity 232 includes a fluid inlet 2321 and a fluid outlet 2322.

[0057] like Figure 9 and Figure 10 As shown, the connecting plate 230 is provided with a fluid input pipe connection port 231, which includes at least two coaxial first holes 2311 and second holes 2312. The inner diameter of the second hole 2312 is smaller than the inner diameter of the first hole 2311, thereby forming a stepped portion within the fluid input pipe connection port 231. The first holes 2311 and second holes 2312 together form a through hole in the thickness direction of the connecting plate 230. One end of the connecting pipe 20 connected to the connecting plate 230 abuts against the stepped portion.

[0058] In this embodiment, the fluid input pipe connection port 231 of the connecting plate 230 is aligned with the fluid inlet 2321 of the transition chamber 232, and the fluid outlet 2322 is connected to the make-up air inlet 241. The transition chamber 232 includes an opening of a predetermined length along the axial direction of the scroll compressor on the fluid inlet 2321 side. When the connecting plate 230 is installed on the scroll compressor, the opening covers at least a portion of the fluid input pipe connection port 231. The jet enthalpy-enhancing fluid from the injection pipe 10 (not shown) enters the fluid input pipe connection port 231 of the connecting plate 230 through the connecting pipe 20, and then enters the make-up air inlet 241 through the transition chamber 232.

[0059] The scroll compressor according to this embodiment can achieve similar beneficial effects to the scroll compressor according to the first embodiment. Furthermore, since the transition chamber no longer needs to be provided in the connecting plate, i.e., only a generally radially extending fluid inlet pipe connection 231 needs to be provided in the connecting plate, the structure of the connecting plate is simplified.

[0060] In a preferred embodiment of this disclosure, such as Figure 11 As shown, it also includes a one-way valve 80. The one-way valve 80 is installed at the air supply inlets 41 and 241 to prevent the jet enthalpy-enhancing fluid entering the air supply inlets 41 and 241 from flowing back or to prevent the fluid from the scroll compressor mechanism from flowing out of the scroll compressor mechanism through the scroll air supply inlet when jet enthalpy enhancement is not used.

[0061] It should be noted that the jet enthalpy-enhancing connection channel in this embodiment may not include the connecting pipe 20. The jet pipe 10 can be directly connected to the connecting plate 30 or the connecting plate 230 (in this variant, the jet pipe 10 constitutes the fluid input pipe according to this application). The fluid input pipe connection port 31, 231 of the connecting plate may, for example, be provided with an outwardly extending protruding tubular portion (not shown in the figure), so that the fluid input pipe connection port of the connecting plate extends outward and can be connected to the jet pipe 10. According to this variant, the structure of the fluid input pipe and thus the jet enthalpy-enhancing connection channel is appropriately simplified by omitting the connecting pipe 20. Furthermore, according to the present invention, it is also conceivable that transition cavities can be provided in both the connecting plate and the peripheral wall of the scroll member. In this variant, each of the two transition cavities includes an opening having a predetermined length along the axial direction of the scroll compressor, and the two openings can communicate with each other.

[0062] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the specific embodiments described and shown herein, and various changes can be made to the exemplary embodiments by those skilled in the art without departing from the scope defined by the claims.

Claims

1. A scroll compressor, the scroll compressor comprising: A scroll component, wherein the scroll component has a supplementary air inlet; A jet enthalpy-enhancing connection channel, wherein the jet enthalpy-enhancing connection channel is used to communicate with a jet enthalpy-enhancing fluid source and to transport fluid from the jet enthalpy-enhancing fluid source to the gas injection inlet of the vortex component; characterized in that, The jet enthalpy enhancement connection channel includes: A fluid input pipe, the fluid input pipe being used to communicate with a jet enthalpy-enhancing fluid source; A connecting plate is provided for connecting the fluid input pipe and the vortex component, and the connecting plate is provided with a fluid input pipe connection port; The jet enthalpy enhancement connection channel further includes a transition cavity disposed on the peripheral wall of the connecting plate and / or the vortex component. The transition cavity includes a fluid inlet and a fluid outlet. The fluid inlet is used to communicate with the fluid input pipe connection port, and the fluid outlet is used to communicate with the supplementary gas inlet. The transition chamber includes an opening of a predetermined length along the axial direction of the scroll compressor on the fluid inlet side or the fluid outlet side, and the fluid input pipe connection or the gas supply inlet is configured to be in fluid communication with the transition chamber at any position within the opening range.

2. The scroll compressor according to claim 1, characterized in that, When the connecting plate is installed on the scroll compressor, the opening covers at least a portion of the fluid input pipe connection or the gas injection inlet.

3. The scroll compressor according to claim 1, characterized in that, The longitudinal axis of the transition cavity is at an angle to the longitudinal axis of the scroll compressor.

4. The scroll compressor according to claim 3, characterized in that, The angle is 2-5°.

5. The scroll compressor according to claim 2, characterized in that, The transition cavity is disposed on the connecting plate, and the opening of the transition cavity is located on the fluid outlet side, adapted to cover at least a portion of the gas inlet.

6. The scroll compressor according to claim 5, characterized in that, The connecting plate is generally disc-shaped, and a sidewall is provided in the connecting plate to define the transition cavity, so that the transition cavity is longitudinally elongated.

7. The scroll compressor according to claim 2, characterized in that, The transition cavity is disposed on the outer peripheral wall of the vortex member, and the opening of the transition cavity is located on the fluid inlet side, adapted to cover at least a portion of the fluid input pipe connection port.

8. The scroll compressor according to any one of claims 1 to 7, characterized in that, The fluid input pipe includes an injection pipe and a connecting pipe. The injection pipe is adapted to be connected to the housing of the scroll compressor, and the connecting pipe is adapted to connect the injection pipe and the fluid input pipe connection port of the connecting plate.

9. The scroll compressor according to any one of claims 1 to 7, characterized in that, It also includes a one-way valve, which is adapted to be installed in the air supply inlet.

10. The scroll compressor according to claim 8, characterized in that, The connecting pipe is constructed with both ends being approximately spherical, and the jet enthalpy-enhancing connecting channel also includes a plug arranged in the jet pipe for abutting the outer end of the connecting pipe.

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