CN217055583U - Scroll compressor having a discharge port for discharging refrigerant from a discharge chamber - Google Patents

Abstract

The utility model provides a scroll compressor, this scroll compressor includes: a housing enclosing an interior space; and a scroll mechanism, the scroll mechanism is disposed in the inner space, the scroll mechanism includes a fixed scroll, the fixed scroll includes an end plate, a fixed scroll wrap extending from a first end surface of the end plate and a circumferential wall disposed around an outer periphery of the end plate and the fixed scroll wrap, wherein the fixed scroll includes a sealing portion located at a radial outer surface of the circumferential wall, the sealing portion is in sealing contact with the housing, thereby dividing the inner space into a high pressure region and a low pressure region which are respectively located at two sides of the sealing portion and are isolated with respect to each other, the scroll compressor further includes an enhanced vapor injection joint device connected to the fixed scroll, thereby forming an injection passage adapted to convey enhanced vapor injection fluid from an enhanced vapor injection fluid source to at least one compression chamber of the scroll mechanism. According to the utility model discloses a scroll compressor, efficient, simple structure and low cost.

Description

Scroll compressor having a discharge port for discharging refrigerant from a discharge chamber

Technical Field

The utility model relates to a scroll compressor, more specifically relates to a large discharge capacity scroll compressor including enhanced vapor injection piecing devices.

Background

An existing general compressor system for cooling/heating (including an air conditioner, a refrigerating apparatus, etc.) generally includes a compressor, a condenser, a main throttle device, and an evaporator, which are sequentially connected to form a circulation loop. In the low-temperature heating working condition, in order to increase the heating quantity, the design of enhanced vapor injection is adopted in the prior art. Enhanced vapor injection systems typically include an economizer with a throttling device connected to the gas make-up port of the compressor to supplement the enhanced vapor injection fluid to at least one compression chamber of the compressor to increase the compressor discharge and thereby increase the amount of heating at low temperatures. Similarly, supplemental enhanced vapor injection (make-up) fluid may be used to increase the capacity of the compressor system.

However, at present, the large-displacement scroll compressor has not been designed with enhanced vapor injection, and particularly, since the large-displacement scroll compressor separates a high-pressure region and a low-pressure region in a completely different manner from a common compressor, the design of a joint device of an enhanced vapor injection pipeline and a fixed scroll is more demanding.

Therefore, the requirement for designing the enhanced vapor injection joint device of the large-displacement scroll compressor exists, so that the performance of the compressor is improved by using the enhanced vapor injection system, the occupied space of the joint is saved, the joint structure is simplified, and the production and processing costs of the joint and the fixed scroll are reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a scroll compressor including enhanced vapor injection piecing devices, this scroll compressor not only has big discharge capacity, and its enhanced vapor injection piecing devices can be connected in order to promote the wholeness ability of compressor with enhanced vapor injection system moreover.

Another object of the utility model is to provide a scroll compressor including enhanced vapor injection piecing devices, wherein, enhanced vapor injection piecing devices can be applicable to the less condition of the machining allowance of deciding the vortex or the more complicated condition of injection route, simple structure, low cost.

According to an aspect of the present invention, there is provided a scroll compressor, including: a housing enclosing an interior space; and a scroll mechanism, the scroll mechanism is arranged in the inner space, the scroll mechanism comprises a fixed scroll, the fixed scroll comprises an end plate, a fixed scroll extending from a first end surface of the end plate and a circumferential wall arranged around the outer periphery of the end plate and the fixed scroll, wherein the fixed scroll comprises a sealing part positioned at the radial outer surface of the circumferential wall, the sealing part is in sealing contact with the shell, so that the inner space is divided into a high pressure area and a low pressure area which are respectively positioned at two sides of the sealing part and are isolated relative to each other, the scroll compressor further comprises an enhanced vapor injection joint device, the enhanced vapor injection joint device is connected to the fixed scroll, and an injection passage suitable for conveying enhanced vapor injection fluid from an enhanced vapor injection fluid source to at least one compression cavity of the scroll mechanism is formed.

Optionally, the non-orbiting scroll comprises a receptacle for receiving the enhanced vapor injection joint device, the receptacle being provided at a second end face of the end plate opposite to the first end face and/or at a radially outer surface of the circumferential wall, the receptacle comprising a first abutment face for abutment with the enhanced vapor injection joint device.

Optionally, the injection channel comprises a first channel section, a second channel section and a third channel section connected in series, the third channel section being formed in the end plate and comprising at least an axial section extending substantially in an axial direction of the scroll compressor communicating to the at least one compression cavity, the first channel section being formed in the enhanced vapor injection fitting arrangement and extending substantially in a direction perpendicular to the axial direction of the scroll compressor and being connected to a source of enhanced vapor injection fluid, the second channel section being formed in the non-orbiting scroll and/or the enhanced vapor injection fitting arrangement.

Optionally, a communication duct extending substantially in a direction perpendicular to an axial direction of the scroll compressor is formed in the end plate to constitute a second duct section, the communication duct extends to the first abutting surface and forms a first opening at the first abutting surface, the enhanced vapor injection joint device includes an external connection portion and an internal connection portion, the first duct section is disposed in the external connection portion and the internal connection portion, one end of the internal connection portion is connected with the external connection portion, and the other end of the internal connection portion includes a second abutting surface abutting against the first abutting surface, so that the first duct section is connected with the first opening.

Optionally, the enhanced vapor injection joint arrangement comprises an circumscribing portion in which the first channel segment is disposed and an inscribed portion configured as a tubular member extending generally in a direction perpendicular to an axial direction of the scroll compressor to define the second channel segment, the third channel segment extending to the first abutment surface and forming a first opening at the first abutment surface, one end of the inscribed portion being connected with the circumscribing portion, the other end of the inscribed portion comprising a second abutment surface abutting the first abutment surface, thereby connecting the second channel segment with the first opening.

Optionally, the enhanced vapor injection joint device comprises an outer junction in which the first channel section is disposed and an inner junction configured as a cap-like member extending substantially in a direction perpendicular to an axial direction of the scroll compressor, the inner junction having a second abutment surface in abutment with the first abutment surface, the first and/or second abutment surface forming a channel there between defining the second channel section between the inner junction and the fixed scroll, the third channel section extending to the first abutment surface and forming a first opening there, the first opening being located in the channel.

Optionally, the extension portion includes a horizontal passage and a vertical passage forming the first passage section, one end of the vertical passage being connected to the horizontal passage and the other end of the vertical passage being connected to the channel.

Optionally, the enhanced vapor injection fitting further comprises a sealing gasket disposed between the first abutment surface and the second abutment surface to form a seal therebetween.

Optionally, the second channel section comprises a first branch and a second branch extending in different directions, the enhanced vapor injection fluid entering the third channel section via the first branch and the second branch, respectively.

Optionally, the first abutment surface is configured to extend substantially in an axial direction of the scroll compressor or substantially in a direction perpendicular to the axial direction of the scroll compressor.

Optionally, the receptacle is configured as a recess provided at the second end face of the end plate and/or the radially outer surface of the circumferential wall.

Optionally, the receptacle is disposed within a low pressure zone or a high pressure zone.

Optionally, the first opening is configured as one or more.

Optionally, the seal is configured as a flange projecting from a radially outer surface of the circumferential wall, the flange being an interference fit with the housing; or the seal portion is configured to include a groove recessed from a radially outer surface of the circumferential wall and a seal member accommodated in the groove, the seal member abutting against the housing.

Optionally, the scroll compressor is a large discharge scroll compressor.

According to the scroll compressor of the utility model, the outer peripheral wall of the fixed scroll and the shell form a sealing contact to divide the inner space of the shell into a high pressure area and a low pressure area, and the fixed scroll is connected with the enhanced vapor injection joint device, thereby further improving the system performance of the compressor by utilizing the enhanced vapor injection technology; the enhanced vapor injection joint device has the advantages of simple structure, easiness in processing and assembling and low cost, and can be widely applied to various large-discharge-capacity scroll compressors, particularly applied to the conditions that the processing allowance of a fixed scroll is small or the injection path is complex, so that the performance of the compressor is improved and the production cost of the compressor is effectively controlled.

Drawings

The features and advantages of one or more embodiments of the present invention will become more readily apparent from the following description taken in conjunction with the accompanying drawings. The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. The figures are not drawn to scale, and some features may be exaggerated or minimized to show details of particular components. In the drawings:

fig. 1 is a longitudinal sectional view of a scroll compressor according to a first embodiment of the present invention;

fig. 2a and 2b are enlarged views of two examples (example a and example a ') of detail a, a' in fig. 1, respectively;

fig. 3 is a schematic perspective view of a non-orbiting scroll of a scroll compressor according to a first embodiment of the present invention;

fig. 4a is an exploded perspective view of a non-orbiting scroll and enhanced vapor injection fitting arrangement of a scroll compressor according to a first embodiment of the present invention;

fig. 4b is a schematic perspective view of the non-orbiting scroll of the scroll compressor according to the first embodiment of the present invention and the enhanced vapor injection joint device (when both are connected);

FIG. 5 is a longitudinal cross-sectional view of the non-orbiting scroll of the scroll compressor according to the first embodiment of the present invention and the enhanced vapor injection fitting apparatus (when connected together);

FIG. 6 is a cross-sectional view of the non-orbiting scroll of the scroll compressor and the enhanced vapor injection fitting arrangement (when connected) according to the first embodiment of the present invention;

fig. 7 is a longitudinal sectional view of a scroll compressor according to a second embodiment of the present invention;

fig. 8a is an exploded perspective view of a non-orbiting scroll and enhanced vapor injection fitting arrangement of a scroll compressor according to a third embodiment of the present invention;

figure 8b is a schematic perspective view of a non-orbiting scroll and enhanced vapor injection fitting arrangement (when connected) of a scroll compressor according to a third embodiment of the present invention;

fig. 9 is a schematic perspective view of a body member of a third embodiment enhanced vapor injection fitting apparatus according to the present invention;

fig. 10a is a top view of a non-orbiting scroll and enhanced vapor injection fitting arrangement (when connected) of a scroll compressor according to a third embodiment of the present invention, with the body pieces and fasteners of the enhanced vapor injection fitting arrangement removed;

FIG. 10B is an enlarged view of detail B in FIG. 10 a;

FIG. 11a is a longitudinal cross-sectional view of a non-orbiting scroll and an enhanced vapor injection fitting arrangement (when connected) of a scroll compressor according to a third embodiment of the present invention;

FIG. 11b is a cross-sectional view of the non-orbiting scroll of the scroll compressor in accordance with the third embodiment of the present invention and the enhanced vapor injection fitting arrangement (when connected);

FIG. 12 is an exploded perspective view of a non-orbiting scroll and enhanced vapor injection fitting arrangement of a scroll compressor according to a fourth embodiment of the present invention;

FIG. 13 is a schematic perspective view of a non-orbiting scroll and enhanced vapor injection fitting arrangement (when connected) of a scroll compressor according to a fourth embodiment of the present invention with the body pieces and fasteners of the enhanced vapor injection fitting arrangement removed;

fig. 14 is a schematic perspective view of a body member of an enhanced vapor injection fitting arrangement according to a fourth embodiment of the present invention;

fig. 15 is a longitudinal sectional view of a non-orbiting scroll and enhanced vapor injection fitting arrangement (when connected) of a scroll compressor according to a fourth embodiment of the present invention;

fig. 16a is an exploded perspective view of a non-orbiting scroll and enhanced vapor injection fitting arrangement of a scroll compressor according to a fifth embodiment of the present invention; and

fig. 16b is a schematic perspective view of a non-orbiting scroll and an enhanced vapor injection fitting device (when both are connected) of a scroll compressor according to a fifth embodiment of the present invention.

Detailed Description

The preferred embodiments of the present invention will now be described with reference to the accompanying drawings, which are given by way of illustration only, and are not to be construed as limiting the invention and its applications.

Fig. 1 is a partial longitudinal sectional view of a scroll compressor according to a first exemplary embodiment of the present invention. As shown in fig. 1, the scroll compressor 100a mainly includes a housing 10, a scroll mechanism, a main bearing housing 40, a drive shaft 50, a motor 60, and the like. The housing 10 generally includes a housing body 14 having a generally cylindrical shape, a top cover 12, and a bottom cover 16. The housing body 14, top cover 12 and bottom cover 16 form the complete housing 10, such as by welding, to enclose an interior space for housing a series of compressor components, such as a scroll mechanism. The internal space is divided into a high-pressure region CH and a low-pressure region CL. In the internal space, the scroll mechanism is supported by a main bearing housing 40, and the main bearing housing 40 is fixedly connected to the casing 10 by, for example, caulking or the like or is formed integrally with the casing 10. The scroll mechanism includes a fixed scroll 20a and an orbiting scroll 30, which is capable of performing a translational rotation with respect to the fixed scroll 30 via the driving of a motor 60 and a drive shaft 50. In other words, the axis of the orbiting scroll 30 orbits with respect to the axis of the non-orbiting scroll 20a, but both the orbiting scroll 30 and the non-orbiting scroll 20a do not rotate on their own axes.

Orbiting scroll 30 includes an end plate 32 and a spiral wrap 34 extending upwardly from one side of end plate 32. The non-orbiting scroll 20a includes an end plate 22, a spiral wrap 24 extending downward from a first end surface of one side of the end plate 22, and a circumferential wall 23 provided around the outer peripheries of the end plate 22 and the wrap 24. In particular, and especially for large displacement scroll compressors, as shown in FIG. 3, non-orbiting scroll 20a further includes a plurality of axially extending holes 234 disposed in circumferential wall 23 thereof, and fasteners are able to pass through plurality of holes 234 to secure non-orbiting scroll 20a to main bearing housing 40. The wrap 24 of the non-orbiting scroll 20a and the wrap 34 of the orbiting scroll 30 mesh with each other to form a series of compression pockets therebetween for compressing a fluid, such as a refrigerant. The working fluid enters the low pressure region CL in the interior space of the housing 10 through a suction fitting provided on the housing 10 (typically the housing body 14), is compressed through a series of compression chambers of the scroll mechanism and enters the high pressure region CH through a central discharge port 28 (fig. 6) in the center of the non-orbiting scroll 20a, and is then discharged out of the scroll compressor 100a through a discharge port fitting provided on the housing 10 (typically the top head 12).

In order to divide the internal space of the housing into a low-pressure region and a high-pressure region, in some prior art, this is usually achieved by providing a partition between the top cover and the housing body. However, for certain compressor types, such as large displacement scroll compressors, other simpler and more reliable separation means are required. Fig. 2a and 2b show two exemplary ways of dividing the inner space of the casing into a low pressure region and a high pressure region, respectively, in which there is a gap between the radially outer surface of the circumferential wall 23 of the non-orbiting scroll 20a and the inner wall of the casing 10, the non-orbiting scroll 20a further includes a sealing portion 26 at the radially outer surface 231 of the circumferential wall 23, and the inner space of the casing is divided into a high pressure region CH and a low pressure region CL, which are located at both sides of the sealing portion 26, respectively, and are isolated with respect to each other, by the sealing portion 26. As shown in fig. 2a, the sealing portion 26 is configured as a flange 232 protruding from a radial outer surface 231 of the circumferential wall 23 toward an inner wall of the housing 10 (shown as the top cover 12 in fig. 2 a), and the flange 232 is substantially annular and extends along the circumferential direction of the circumferential wall 23, and is in interference fit with the inner wall of the housing, thereby achieving sealing isolation of spaces on the upper and lower sides of the flange 232. As also shown in fig. 2b, the sealing portion 26 may be further configured to include a groove 232 'recessed from the radially outer surface 231' of the circumferential wall 23 toward a direction opposite to the inner wall of the housing 10 (shown as the top cover 12 in fig. 2 b) and a sealing member 233 'accommodated in the groove 232', the groove 232 'being configured as a substantially circular through groove extending along the circumference of the circumferential wall 23, and accordingly, the sealing member 233' is also substantially circular, and the sealing member 233 'abuts against the inner wall of the housing, thereby achieving sealing isolation of the spaces on the upper and lower sides of the sealing member 233'. The two exemplary separation methods shown in fig. 2a and 2b not only omit the partition plate, so that the compressor has simple structure and easy production and installation operation, but also have more reliable separation effect between the high pressure region and the low pressure region, and are especially suitable for the large discharge scroll compressor.

In order to further improve the performance of the compressor, especially the large displacement scroll compressor, the scroll compressor 100a according to the first embodiment of the present invention also has an enhanced vapor injection design. Specifically, as shown in fig. 1, scroll compressor 100a includes an enhanced vapor injection fitting device 70a, which enhanced vapor injection fitting device 70a is connected to the non-orbiting scroll 20a and is capable of passing through the housing 10 or engaging with an enhanced vapor injection inlet fitting on the housing 10 to thereby connect the scroll compressor 100a with an enhanced vapor injection system external to the scroll compressor 100 a.

A detailed description of a specific connection structure of the scroll compressor 100a and the enhanced vapor injection system according to the first embodiment of the present invention is provided below with reference to fig. 4a, 4b, 5 and 6. As shown in fig. 4a and 4b, the non-orbiting scroll 20a includes an accommodating portion 221a for accommodating the enhanced vapor injection joint device 70a, the accommodating portion 221a being provided at a second end surface of the end plate 22 of the non-orbiting scroll 20a, which is an end surface of the end plate 22 opposite to the first end surface provided with the wrap 24, and a radially outer surface of the circumferential wall 23, configured as a substantially rectangular recessed portion provided at the second end surface and the radially outer surface of the circumferential wall. In other words, the generally rectangular recess is defined to extend inwardly (i.e., toward the opposite direction from the housing) from the radially outer side wall of the circumferential wall 23 and a distance above the end plate 22. This distance does not exceed the radius of the non-orbiting scroll 20a, thereby avoiding the impact of the mounting of the enhanced vapor injection fitting arrangement on the exhaust structure (e.g., central exhaust port 28) and/or pressure relief structure in the center of the non-orbiting scroll 20 a. A first abutment surface 222a extending substantially in the axial direction of the scroll compressor is formed at an extending tip end of the accommodating portion 221a (or the substantially rectangular recessed portion), and the first abutment surface 222a is for abutment with the enhanced vapor injection joint device 70 a. The depth of the accommodating portion 221a recessed downward corresponds to the thickness of the enhanced vapor injection fitting device 70a, but at least the bottom of the accommodating portion 221a must remain above the sealing portion 26. That is, the accommodating part 221a is disposed within the high pressure zone CH. Also formed in the end plate 22 of the non-orbiting scroll 20a are communication port holes 2231a, 2232a extending substantially in a direction perpendicular to the axial direction of the scroll compressor 100a and two different vertical port holes extending substantially in the axial direction of the scroll compressor 100a so as to communicate with a compression chamber (e.g., an intermediate-pressure chamber), the communication port holes 2231a, 2232a extending in different directions, one end of both extending commonly to the first abutment surface 222a and forming a first opening 223a at the first abutment surface 222a, and the other end being provided with an opening 2233a for communication respectively to the corresponding vertical port holes.

The enhanced vapor injection fitting arrangement 70a includes a fitting body portion 72a, a sealing gasket 71a, and a fastener 73a, such as a screw. The joint main body portion 72a is formed in a substantially linear shape, and is formed by interconnecting an external portion 726a and an internal portion 724a or is integrally formed, and a duct 722a extending substantially in the axial direction of the joint main body portion 72a is formed inside the joint main body portion 72 a. The external connecting portion 726a can be connected to an enhanced vapor injection fluid source, one end of the internal connecting portion 724a is connected to the external connecting portion 726a, and the other end of the internal connecting portion 724a includes a wing portion for fixedly connecting with the fixed scroll 20 a. The wing is configured to extend from the axis of the joint main body portion 72a toward both left and right sides of the axis in a plane perpendicular to the axis of the joint main body portion 72a, and a through hole 721a for the fastener 73a is formed at a position near the outer edge of the wing. An end surface of the wing portion opposite to the external portion 726a constitutes a second abutment surface 723a for abutting against the first abutment surface 222 a. An outlet of the orifice 722a is formed at the second abutting surface 723 a. The sealing gasket 71a is provided between the second abutment surface 723a and the first abutment surface 222a to form a seal therebetween. A fastening hole 224a for receiving the fastener 73a is provided at the first abutment surface 222a corresponding to the through hole 721a of the joint main body portion 72a, and a through hole 712a through which the fastener 73a passes is provided on the seal gasket 71 a. Corresponding to the outlet of the port 722a at the second abutment surface 723a of the joint main body portion 72a, the first abutment surface 222a is provided with a first opening 223a that is aligned with and communicates with the outlet of the port 722a, and the seal gasket 71a is provided with an opening 711a that is aligned with and communicates with the outlet of the port 722a and the first opening 223a, respectively. In mounting and fixing the enhanced vapor injection joint device 70a to the fixed scroll 20a, the enhanced vapor injection joint device 70a is first placed in the accommodating portion 221a, and then the fastening member 73a is sequentially inserted through the through hole 721a of the joint main body portion 72a, the through hole 712a of the sealing gasket 71a, and finally inserted into the fastening hole 224a of the fixed scroll 20a, so that the enhanced vapor injection joint device 70a is fixedly mounted in place on the fixed scroll 20 a.

When the enhanced vapor injection fitting device 70a is in place on the non-orbiting scroll 20a, the outlet of the orifice 722a in the enhanced vapor injection fitting device 70a is aligned with and communicates with the opening 711a of the sealing gasket 71a and the first opening 223a at the first abutment surface 222a of the non-orbiting scroll 20a, thereby forming an injection passage in the enhanced vapor injection fitting device 70a and the non-orbiting scroll 20a adapted to deliver enhanced vapor injection fluid from the enhanced vapor injection fluid source to at least one compression chamber of the scroll mechanism. Referring to fig. 5 and 6, the injection passage includes first, second and third passage sections connected in sequence from the exterior to the interior of the non-orbiting scroll 20a, the first passage section being formed within the enhanced vapor injection fitting arrangement 70a (i.e., in the inboard and outboard sections 724a, 726 a) and extending generally in a direction perpendicular to the axial direction of the scroll compressor 100a, i.e., being primarily constituted by the port 722a within the fitting body portion 72 a. The second passage section is formed in the non-orbiting scroll 20a, that is, is constituted by the communicating hole passages 2231a, 2232a in the end plate 22 of the non-orbiting scroll 20a, that is, the second passage section has two branches extending in different directions. The third passage section is formed in the end plate 22 and includes at least an axial section extending in the axial direction of the scroll compressor 100a, i.e., is constituted by a vertical bore communicating with at least one compression chamber of the compressor. The number of the vertical pore channels corresponds to the number of the communication pore channels. That is, the communicating ducts 2231a, 2232a communicate with the duct 722a of the enhanced vapor injection joint device 70a, on the one hand, through the first openings 223a, and to the source of enhanced vapor injection fluid, and on the other hand, with the respective vertical ducts via the openings 2233a of the communicating ducts 2231a, 2232a, respectively, and thus to the compression chambers of the compressor. Thereby, fluid from the enhanced vapor injection fluid source is able to flow sequentially through the orifices 722a, the outlets of the orifices 722a at the second abutment surface 723a, the openings 711a of the sealing gasket 71a, the first openings 223a, and then into at least one compression chamber of the compressor via the communication passages 2231a, 2232a, the openings 2233a in the communication orifices 2231a, 2232a, and the vertical orifices in the end plate 22, respectively.

In addition, as shown in fig. 6, there are two communicating ports 2231a, 2232a in this example as two branches of the second channel section extending in different directions, both configured to be arranged substantially symmetrically, so as to deliver the enhanced vapor injection fluid to the two compression chambers substantially symmetrically, to facilitate balancing of the compressor. It will be understood by those skilled in the art that the communication channel may be provided in one or more.

According to the utility model discloses a scroll compressor of first embodiment has not only realized the overall performance of jet enthalpy-increasing design in order effectively to improve compressor system, and jet enthalpy-increasing piecing devices 70a simple structure, installation are easy moreover, are favorable to reducing the processing cost who decides the connection structure between vortex and the jet enthalpy-increasing piecing devices, and the specially adapted decides the up end (second terminal surface) machining allowance than sufficient condition of vortex.

Fig. 7 shows a scroll compressor 100b according to a second embodiment of the present invention. In the second embodiment of the present invention, the main structure and function of the scroll compressor 100b are substantially the same as those of the scroll compressor 100a of the first embodiment, and the main structure of the enhanced vapor injection joint device 70b, the main structure of the communication channel and the vertical hole in the fixed scroll 20b, and the connection mode of the enhanced vapor injection joint device 70b and the fixed scroll 20b in the scroll compressor 100b are similar to those of the first embodiment, and therefore are not described again. With the difference that enhanced vapor injection joint arrangement 70b is disposed in low pressure zone CL rather than high pressure zone CH. This arrangement is particularly suitable for the case where the machining allowance of the upper end face (second end face) of the fixed scroll is insufficient. Specifically, the non-orbiting scroll 20b includes a receiving portion 221b for receiving the enhanced vapor injection joint device 70b, the receiving portion 221b is formed by a recessed portion having a substantially rectangular shape at a radially outer side surface of the circumferential wall 23 of the non-orbiting scroll 20b, and a bottom surface of the recessed portion (the bottom surface extending in the axial direction of the scroll compressor) constitutes a first abutment surface 222 b. The generally rectangular recessed portion is defined to extend downwardly from below the seal portion 26a distance commensurate with the thickness of the enhanced vapor injection fitting arrangement 70 b. However, the accommodating portion 221b may extend downward from below the sealing portion 26 to the lowermost end of the circumferential wall 23, as shown in fig. 7, thereby facilitating the processing.

In the second embodiment, similar to the first exemplary embodiment, not only is the enhanced vapor injection design realized to effectively improve the overall performance of the compressor system, but also the enhanced vapor injection joint device 70b has a simple structure, is easy to install, and is beneficial to reducing the production cost. More importantly, the enhanced vapor injection system can be connected with the fixed scroll in a simple and easy installation and low cost manner under the condition that the machining allowance of the upper end face (second end face) of the fixed scroll is insufficient.

Fig. 8a and 8b show a non-orbiting scroll 20c and an enhanced vapor injection fitting arrangement 70c of a scroll compressor according to a third embodiment of the present invention. In the third embodiment of the present invention, the main structure and function of the scroll compressor are substantially the same as those of the scroll compressor 100a of the first embodiment, and therefore, the description thereof is omitted. The difference is that the enhanced vapor injection joint device 70c and the fixed scroll 20c according to the third embodiment of the present invention have different configurations and connection manners from the enhanced vapor injection joint device 70a and the fixed scroll 20a of the first embodiment.

As shown in fig. 8a and 8b, the non-orbiting scroll 20c includes an accommodating portion 221c for accommodating the enhanced vapor injection joint device 70c, the accommodating portion 221c being provided at the second end surface of the end plate 22 of the non-orbiting scroll 20 c. The accommodating portion 221c has a substantially arc shape whose arc-shaped extending path is defined to extend from a point on the second end face corresponding to the position of one compression chamber to a point corresponding to the other compression chamber. The receiving portion 221c may be configured as a concave portion recessed from the second end surface, or may be non-concave. The accommodation portion 221c includes a first abutment surface 222c extending substantially in a direction perpendicular to the axial direction of the scroll compressor, the first abutment surface 222c being for abutment with the enhanced vapor injection joint device 70 c. The accommodating portion 221c is disposed in the high pressure zone CH. The end plate 22 of the non-orbiting scroll 20c also has formed therein two distinct vertical passages extending generally in the axial direction of the scroll compressor to communicate with the compression chambers. One end of the vertical duct is connected to one compression chamber of the compressor, and the other end extends to the first abutting surface 222c and forms a first opening 2233c at the first abutting surface 222 c.

Enhanced vapor injection fitting 70c includes a fitting body portion 72c, a sealing gasket 71c, and a fastener 73c, such as a screw. The connector body portion 72c is formed by connecting an external portion 726c and an internal portion to each other or integrally formed. The extension portion 726c has a substantially linear shape, and has a horizontal channel 7223c and a vertical channel 7225c (fig. 9) formed therein and communicating with each other, wherein one end of the horizontal channel 7223c is connectable to an enhanced vapor injection fluid source outside the compressor, and the other end thereof is connected to the vertical channel 7225 c. The inner connection portion is configured as a substantially arc-shaped cap-like member extending substantially in a direction perpendicular to the axial direction of the scroll compressor. The arcuate path of the cover-like member coincides with the arcuate path of the receiving portion 221 c. The inner joint portion is connected to the outer joint portion 726c at a position substantially at the midpoint of the path of the arc extension thereof, and may be said to be configured to include a first inner joint section 724c and a second inner joint section 725c extending along the arc from one end of the outer joint portion 726c toward the left and right sides of the axis of the outer joint portion 726c, respectively. The first and second inner segments 724c, 725c have one end connected to the outer joint 726c and the other end having enlarged ends 7241c, 7251c, respectively. Referring to fig. 9, a bottom surface of the internal contact portion (i.e., a surface facing the first abutment surface 222c) constitutes a second abutment surface 723c for abutting against the first abutment surface 222 c. The second abutment surface 723c is formed with first and second channels 7221c and 7222c, respectively, at the first and second inner sections 724c and 725c, respectively, that extend along the arcuate path of the cap member. One ends of the first and second channels 7221c, 7222c communicate with each other and an opening 7224c is provided in the channel at that communication location to serve as an outlet for the vertical bore 7225c of the extension 726c, with the other ends of the first and second channels 7221c, 7222c being located in the enlarged ends 7241c, 7251c of the first and second inner sections 724c, 725c, respectively, and preferably being configured as first and second channel ends 7228c, 7226c that are slightly enlarged compared to the dimensions of the other portions of the first and second channels 7221c, 7222c, to facilitate positioning and secure mounting of the cover member. The inner portion also includes a plurality of through holes 721c arranged along the arcuate path of the cap member and spaced from the channels 7221c, 7222 c. The sealing gasket 71c is provided between the second abutment surface 723c and the first abutment surface 222c to form a seal therebetween. A fastening hole 224c for receiving the fastening piece 73c is provided at the first abutment surface 222c corresponding to the through hole 721c of the inner part, and a through hole 712c through which the fastening piece 73c passes is provided on the seal gasket 71 c. Corresponding to the first and second channel ends 7228c, 7226c at the second abutment surface 723c of the inner portion, a first opening 2233c is provided at the first abutment surface 222c in alignment and communication with the first and second channel ends 7228c, 7226c, and an opening 711c is provided at the sealing gasket 71c in alignment and communication with the first and second channel ends 7228c, 7226c and the first opening 2233c, respectively. In mounting and fixing the enhanced vapor injection fitting device 70c to the non-orbiting scroll 20c, the enhanced vapor injection fitting device 70c is first placed in the accommodating portion 221c, and then the fastening member 73c is sequentially inserted through the through hole 721c of the inner portion, the through hole 712c of the sealing gasket 71c, and finally inserted into the fastening hole 224c of the non-orbiting scroll 20c, so that the enhanced vapor injection fitting device 70c is fixedly mounted in place on the non-orbiting scroll 20 c.

When the enhanced vapor injection fitting device 70c is installed in place on the non-orbiting scroll 20c, the first and second channels 7221c and 7222c are aligned with and in communication at their first and second channel ends 7228c and 7226c with the opening 711c of the sealing gasket 71c and the first opening 2233c at the first abutment surface 222c of the non-orbiting scroll 20c, thereby forming an injection passage within the enhanced vapor injection fitting device 70c and the non-orbiting scroll 20c adapted to deliver enhanced vapor injection fluid from the enhanced vapor injection fluid source to at least one compression chamber of the scroll mechanism. Referring to fig. 11a and 11b, the injection passage comprises a first passage section, a second passage section and a third passage section, which are connected in sequence from the outside to the inside of the non-orbiting scroll 20a, the first passage section being provided in the extension 726c of the enhanced vapor injection fitting device 70c, i.e. consisting of a horizontal duct 7223c and a vertical duct 7225c in the extension 726c, one end of the vertical duct 7225c being connected to the horizontal duct 7223c and the other end being connected to the channels 7221c, 7222c through an opening 7224c located in the channels 7221c, 7222 c. The second passage section is defined between the inner portion and the non-orbiting scroll 20c by channels 7221c, 7222 c. A third passage section is formed in the end plate 22 generally in the axial direction of the scroll compressor, i.e., is constituted by a vertical bore communicating with at least one compression chamber of the compressor. The number of vertical channels corresponds to the number of channels (ends of channels). With the first openings 2233c disposed within the channels 7221c, 7222c, the vertical bore is allowed to communicate with the channels 7221c, 7222c, and with the outlet (opening 7224c) of the vertical bore 7225c disposed within the channels 7221c, 7222c, the channels 7221c, 7222c are allowed to communicate with the vertical bore 7225c and the horizontal bore 7223c in the circumscribing portion 726c and to a source of enhanced vapor injection fluid. Thus, fluid from the enhanced vapor injection fluid source is able to flow sequentially through the horizontal channel 7223a, the vertical channel 7225c, the opening 7224c, then flow in different directions via the channels 7221c and 7222c, respectively, and enter at least one compression chamber of the compressor via the opening 711c of the sealing gasket 71c, the first opening 2233c, and the vertical channel in the end plate 22.

In addition, as shown in fig. 9, there are two channels (a first channel 7221c and a second channel 7222c) as two branches of the second channel section extending in different directions, both configured to be arranged substantially symmetrically, so as to deliver the enhanced vapor injection fluid to the two compression chambers substantially symmetrically, to facilitate the balancing of the compressor. One skilled in the art will appreciate that the channels may be provided in one or more. In addition, the channel and the corresponding cover member and receiving portion are not limited to an arc shape, but may be configured in a straight line shape or a curved line shape (e.g., a U-shape). In addition, as shown in fig. 10a and 10b, the first openings 2233c at each channel end are shown in this example as two, but one skilled in the art will appreciate that the first openings 2233c may be configured as one or more.

According to the utility model discloses a scroll compressor of third embodiment has not only realized the overall performance of enhanced vapor injection design in order effectively to improve compressor system, and the not enough condition of up end (second terminal surface) machining allowance of specially adapted fixed vortex moreover. The cover-shaped configuration of the enhanced vapor injection joint device 70c and the formed channel in the enhanced vapor injection joint device are used as a part of the injection channel, so that the manufacturing and processing of the fixed scroll are simpler, and the enhanced vapor injection joint device 70c is easier to position and install on the fixed scroll, thereby being beneficial to reducing the production and manufacturing cost.

Fig. 12 shows a non-orbiting scroll 20d and a enhanced vapor injection joint arrangement 70d according to a fourth embodiment of the present invention. In the fourth embodiment of the present invention, the main structure and function of the scroll compressor are substantially the same as those of the scroll compressor of the third embodiment, and the general structure and connection mode of the enhanced vapor injection joint device 70d and the fixed scroll 20d in the scroll compressor are also similar to those of the enhanced vapor injection joint device 70c and the fixed scroll 20c in the third embodiment, and therefore are not described again. The difference is that the channel for constituting the second passage section of the injection passage is provided at the first abutment surface 222d of the non-orbiting scroll 20d, instead of at the second abutment surface 723d of the enhanced vapor injection joint device 70 d.

Specifically, referring to fig. 12 and 13, the non-orbiting scroll 20d includes a receiving portion 221d for receiving the enhanced vapor injection joint device 70d, the receiving portion 221d being provided at the second end surface of the end plate 22 of the non-orbiting scroll 20 d. The accommodating portion 221d has a substantially arc shape whose arc-shaped extending path is defined to extend from a point on the second end face corresponding to the position of one compression chamber to a point corresponding to the other compression chamber. The receiving portion 221d may be configured as a concave portion that is concave from the second end surface, or may be non-concave. The receptacle 221d (including a first abutment face 222d extending generally perpendicular to the axial direction of the scroll compressor, the first abutment face 222d for abutment with the enhanced vapor injection fitting device 70 d. the first abutment face 222d also has formed therein a channel 223d extending along an arcuate path of extension, the two ends of the channel 223d being configured as a first channel end 2231d and a second channel end 2232d, respectively, slightly enlarged in size compared to the remainder of the channel 223d, thereby facilitating the location and fixed mounting of the enhanced vapor injection fitting device 70 d. the receptacle 222d also includes formed therein the end plate 22 of the non-orbiting scroll 20d a plurality of vertical channels 224d arranged along the direction of extension of the channel 223d and spaced from the channel 223d, extending generally in the axial direction of the scroll compressor to communicate the compression chambers one end of the vertical channels to one of the compression chambers of the compressor, the other end extends to the first abutment surface 222d and forms a first opening 2233d at the first abutment surface 222d, the first opening 2233d being located within the first channel end 2231d and the second channel end 2232d, respectively.

The enhanced vapor injection fitting arrangement 70d includes a fitting body portion 72d, a sealing gasket 71d, and a fastener 73 d. The connector body 72d is formed by connecting an external part 726d and an internal part to each other or integrally formed. The external connection portion 726d has a substantially linear shape, and a horizontal duct 7223d and a vertical duct 7225d (fig. 14 and 15) which are communicated with each other are formed inside the external connection portion, one end of the horizontal duct 7223d can be connected to an enhanced vapor injection fluid source outside the compressor, and the other end is connected to the vertical duct 7225 d. The inner connection portion is configured as a substantially arc-shaped cap-like member extending substantially in a direction perpendicular to the axial direction of the scroll compressor. The inner joint portion is configured to include a first inner joint section 724d and a second inner joint section 725d that extend in arcs from one end of the outer joint portion 726d toward the left and right sides of the axis of the outer joint portion 726d, respectively. First and second inner segments 724d, 725d have one end connected to the outer joint 726 and the other end with enlarged ends 7241d, 7251d corresponding to the first and second channel ends 2231d, 2232d, respectively. Referring to fig. 14, a bottom surface (i.e., a surface facing the first abutment surface 222 d) of the inscribed portion 724d constitutes a second abutment surface 723d for abutting against the first abutment surface 222 d. The second abutting surface 723d is a flat surface. The second abutment surface 723d further includes an opening 7224d therein which serves as an outlet for the vertical duct 7225 d.

The seal gasket 71d is provided between the second abutment surface 723d and the first abutment surface 222d to form a seal therebetween. The inner contact portion is provided with a through hole 721d through which the fastening member 73d passes, and the seal gasket 71d is provided with a through hole 712d through which the fastening member 73d passes, corresponding to the fastening hole 224d of the non-orbiting scroll 20 d. The seal gasket 71d is provided with an opening 711d aligned with and communicating with the second opening 7224d, corresponding to the opening 7224d at the second abutment surface 723 d. In mounting and fixing the enhanced vapor injection joint device 70d to the non-orbiting scroll 20, the enhanced vapor injection joint device 70d is first placed in the accommodating portion 221d, and then the fastening member 73d is sequentially inserted through the through hole 721d of the inner portion, the through hole 712d of the sealing gasket 71d, and finally inserted into the fastening hole 224d of the non-orbiting scroll 20d, so that the enhanced vapor injection joint device 70d is fixedly mounted in place on the non-orbiting scroll 20 d.

When the enhanced vapor injection fitting device 70d is in place on the non-orbiting scroll 20d, the opening 7224d at the second abutment surface 723d is aligned with and in communication with the opening 711d in the sealing gasket 71d, and the first opening 2233d at the first abutment surface 222d is positioned within the channel 223d, thereby forming an injection passage within the enhanced vapor injection fitting device 70c and the non-orbiting scroll 20c adapted to deliver enhanced vapor injection fluid from the enhanced vapor injection fluid source to at least one compression chamber of the scroll. Referring to fig. 15, the injection passage includes a first passage section, a second passage section, and a third passage section connected in sequence from the outside to the inside of the non-orbiting scroll 20d, the first passage section being provided in an outer-circumscribing portion 726d of the enhanced vapor injection joint device 70d, that is, being constituted by a horizontal bore 722dc and a vertical bore 7225d within the outer-circumscribing portion 726d, one end of the vertical bore 7225d being connected to the horizontal bore 7223d, and the other end being connected to the channel 223d through an opening 7224d formed at the second abutting surface 723d and located within the channel 223 d. The second passage section is defined by a slot 223d between the inner portion and the non-orbiting scroll 20 d. The third passage section is formed in the end plate 22 generally in the axial direction of the scroll compressor, i.e., is formed by a vertical port communicating with at least one compression chamber of the compressor. The number of vertical channels corresponds to the number of ends of the channel. On the one hand, with the first openings 2233d disposed in the channel 223d, the vertical bore is allowed to communicate with the channel 223d, and on the other hand, with the outlet of the vertical bore 7225d (the opening 7224d on the second abutment surface 723 d) disposed in the channel 223d, the channel 223d is allowed to communicate with the vertical bore 7225d and the horizontal bore 7223d in the circumscribing portion 726d, and to a source of enhanced vapor injection fluid. Thus, fluid from the enhanced vapor injection fluid source is able to flow sequentially through the horizontal port 7223d, the vertical port 7225d, the opening 7224d, the opening 711d in the sealing gasket 71d, into the channel 223d, then in the channel 223d in two different directions and finally into the first opening 2233d and the vertical ports in the end plate 22, and thus into at least one compression chamber of the compressor.

In the fourth embodiment, similar to the third exemplary embodiment, not only the enhanced vapor injection design is realized to effectively improve the overall performance of the compressor system, but also it is particularly suitable for the case where the machining allowance of the upper end face (second end face) of the non-orbiting scroll is insufficient. In addition, the channel is formed at the second end face of the fixed scroll and is used as a part of the injection channel, so that the manufacturing and processing of the enhanced vapor injection joint device are simpler, the enhanced vapor injection joint device is easier to position and install on the fixed scroll, and the production and manufacturing cost is reduced.

In addition, the skilled person may imagine that the channel may be formed not only at the second abutment surface of the enhanced vapor injection joint device or at the first abutment surface of the non-orbiting scroll, but also at both the first and second abutment surfaces. The second channel section of the injection channel is formed jointly by the two channels on the first and second abutment surfaces being aligned and in sealing engagement. Such a structure and arrangement can further increase the flow area of the injection passage (second passage section), thereby additionally providing an effect of injection efficiency improvement.

Fig. 16a and 16b show a non-orbiting scroll 20e and an enhanced vapor injection joint arrangement 70e of a scroll compressor according to a fifth embodiment of the present invention. In the fifth embodiment of the present invention, the main structure and function of the scroll compressor are substantially the same as those of the scroll compressor 100a of the first embodiment, and therefore, the description thereof is omitted. The difference is that the enhanced vapor injection joint device 70e and the non-orbiting scroll 20e according to the fifth embodiment of the present invention have different configurations and connection manners from the enhanced vapor injection joint device 70a and the non-orbiting scroll 20a of the first embodiment.

As shown in fig. 16a and 16b, the non-orbiting scroll 20e includes a receiving portion 221e for receiving the enhanced vapor injection fitting device 70e, the receiving portion 221e being provided at the second end surface of the end plate 22 of the non-orbiting scroll 20 e. The receiving portion 221e has a substantially arc shape, and an arc extending path thereof is defined to extend from a point on the second end face substantially corresponding to the position of one compression chamber to a point substantially corresponding to the other compression chamber. The receiving portion 221e may be configured as a concave portion recessed from the second end surface, or may be non-concave. The accommodation section 221e includes a first abutment surface 222e extending substantially in the axial direction of the scroll compressor, the first abutment surface 222e being for abutment with the enhanced vapor injection joint device 70e, and a first opening 233e being further formed at the first abutment surface 222 e. The accommodating portion 221e is disposed in the high pressure zone CH. Also formed in the end plate 22 of the non-orbiting scroll 20e are two distinct tortuous ports communicating with the compression pockets, each tortuous port including an axial section extending generally in the axial direction of the scroll compressor and a transverse section extending generally perpendicular to the axial direction of the scroll compressor. One end of the bent tunnel (axial section) is communicated to one compression chamber of the compressor, and the other end (lateral section) of the bent tunnel extends to the first abutting surface 222e and forms a first opening 233e at the first abutting surface 222 e.

The enhanced vapor injection joint device 70e includes an inner joint portion, an outer joint portion 72e, and a joint portion 73e interconnecting the inner joint portion and the outer joint portion 722. Alternatively, the circumscribed portion 72e and the inscribed portion may also be integrally formed. The extension 72e is generally linear and defines a port 722e therein that is connectable to a source of enhanced vapor injection fluid external to the compressor. The inner connection portion is configured as a tubular member extending substantially in a direction perpendicular to the axial direction of the scroll compressor. The tubular member may be configured to be flexible. The inner joint portion is connected to the outer joint portion 726c at a position substantially at the midpoint of the extending path of the tubular member thereof with the joint portion 73e, and the joint portion 73e is also said to be configured as a three-way, and the inner joint portion is configured to include the first inner pipe 74e and the second inner pipe 75e extending in an arc from the two outlet ports of the joint portion 73e toward the axis left and right sides of the outer joint portion 726c, respectively. One ends of the first and second inner pipes 74e and 75e are connected to the two outlet ports of the joint portion 73e, respectively, and the other ends are configured as first and second abutment end portions 741e and 751e, respectively. The first abutting end 741e of the first inner pipe 74e and the second abutting end 751e of the second inner pipe 75e respectively include a respective duct outlet, a second abutting surface for abutting against the first abutting surface 222e, and a sealing member (not shown) for sealing between the first abutting surface and the second abutting surface.

In mounting and fixing the enhanced vapor injection joint device 70e to the fixed scroll 20e, the enhanced vapor injection joint device 70e is first placed in the accommodating portion 221e, then the first abutting surface 222e is brought into abutment with the second abutting surface, and the first abutting end 741e and the second abutting end 751e can be at least partially inserted into the first opening 233e on the first abutting surface 222e, so that the first inner pipe 74e and the second inner pipe 75e are fixedly connected with the fixed scroll 20e and finally the enhanced vapor injection joint device 70e is fixedly mounted in place on the fixed scroll 20 e.

When the enhanced vapor injection fitting 70e is in place on the non-orbiting scroll 20e, the conduit outlets of the first and second abutting ends 741e, 751e of the first and second inner conduits 74e, 75e are aligned with and communicate with the first opening 233e on the first abutting face 222e of the non-orbiting scroll 20e, thereby forming an injection passage within the enhanced vapor injection fitting 70e and the non-orbiting scroll 20e adapted to deliver enhanced vapor injection fluid from the enhanced vapor injection fluid source to at least one compression chamber of the scroll. The injection passage includes a first passage section, a second passage section, and a third passage section connected in this order from the outside to the inside of the non-orbiting scroll 20e, the first passage section being provided in the circumscribed portion 72e of the enhanced vapor injection joint device 70e, i.e., being constituted by a port 722e of the circumscribed portion 72e, an outlet of the port 722e being connected to one inlet port of the joint portion 73 e. The second channel section is defined by a first inner nipple 74e and a second inner nipple 75 e. The third channel section is formed in the end plate 22, i.e. is formed by a bent bore communicating with at least one compression chamber of the compressor. The transverse section of the tortuous passage may be adapted to receive the inserted portions of the first and second abutment ends 741e, 751 e. The number of the bent pore canals corresponds to the number of the inner connecting pipes. Thus, fluid from the enhanced vapor injection fluid source is able to flow sequentially through the ports 722e in the extension 72e, the nipple 73e, then through the inner tubes 74e and 75e, respectively, in two different directions, and finally into the first opening 2233e and the tortuous ports in the end plate 22 to the at least one compression chamber of the compressor.

In addition, there are two inner conduits (first inner conduit 74e and second inner conduit 75e) as two branches of the second channel section extending in different directions in this example, both configured to be arranged substantially symmetrically, so as to deliver the enhanced vapor injection fluid to the two compression chambers substantially symmetrically, to facilitate the balancing of the compressor. It will be appreciated by those skilled in the art that the inner joint may be provided in one or more. In addition, the fixed connection of the inner pipe to the non-orbiting scroll is not limited to the above-described manner in which the abutment end is at least partially inserted into the first opening, but may be fixedly connected in other equivalent manners, for example, with screws.

According to the utility model discloses a scroll compressor of fifth embodiment has not only realized the jet enthalpy-increasing design in order effectively to improve compressor system's wholeness ability, and the specially adapted decides the not enough and complicated condition in injection route of up end (second terminal surface) machining allowance of vortex moreover. Since the nipple can be constructed to be flexible, there is no need to specifically restrict the extension path of the nipple, nor to specifically restrict the receptacle to match the shape of the nipple, thereby facilitating manufacturing production and facilitating the generation of complex spray paths. And the fixed vortex and injection enthalpy-increasing joint device is simple in structure, easy to position and install and beneficial to reducing the production and manufacturing cost.

Although various embodiments of the present invention have been described in detail herein, it is to be understood that the invention is not limited to the precise embodiments herein described and illustrated, and that other modifications and variations may be effected by one skilled in the art without departing from the spirit and scope of the invention. All such variations and modifications are intended to fall within the scope of the present invention. Moreover, all the components described herein can be replaced by other technically equivalent components.

Claims (15)

1. A scroll compressor, the scroll compressor comprising:

a housing enclosing an interior space; and

a scroll mechanism disposed within the interior space, the scroll mechanism including a non-orbiting scroll including an end plate, a non-orbiting scroll wrap extending from a first end surface of the end plate, and a circumferential wall disposed about a periphery of the end plate and the non-orbiting scroll wrap,

characterized in that the non-orbiting scroll includes a sealing portion at a radially outer surface of the circumferential wall, the sealing portion being in sealing contact with the casing so as to divide the inner space into a high pressure region and a low pressure region on both sides of the sealing portion, respectively, and isolated with respect to each other,

the scroll compressor further includes an enhanced vapor injection coupling device coupled to the non-orbiting scroll to form an injection passage adapted to deliver enhanced vapor injection fluid from a source of enhanced vapor injection fluid to at least one compression chamber of the scroll mechanism.

2. The scroll compressor of claim 1, wherein:

the fixed scroll comprises a containing part for containing the enhanced vapor injection joint device,

the accommodation portion is provided at a second end face of the end plate opposite to the first end face and/or at a radially outer surface of the circumferential wall,

the accommodating portion comprises a first abutting surface for abutting with the enhanced vapor injection joint device.

3. The scroll compressor of claim 2, wherein the injection channel comprises a first channel segment, a second channel segment, and a third channel segment connected in series, the third channel segment formed within the end plate and including at least an axial section extending generally in an axial direction of the scroll compressor for communication to the at least one compression cavity, the first channel segment formed within the enhanced vapor injection fitting arrangement and extending generally in a direction perpendicular to the axial direction of the scroll compressor and connected to the source of enhanced vapor injection fluid, the second channel segment formed in the non-orbiting scroll and/or the enhanced vapor injection fitting arrangement.

4. The scroll compressor of claim 3, wherein:

a communication port extending in a direction substantially perpendicular to an axial direction of the scroll compressor is formed in the end plate to constitute the second passage section, the communication port extending to the first abutment surface and forming a first opening at the first abutment surface,

jet enthalpy-increasing joint device includes external portion and internal joint portion, first passageway section sets up external portion with in the internal joint portion, the one end of internal joint portion with external portion connects, the other end of internal joint portion include with the second butt face of first butt face butt, thereby make first passageway section with first opening is connected.

5. The scroll compressor of claim 3, wherein:

the enhanced vapor injection joint arrangement including an circumscribing portion in which the first channel section is disposed and an inscribed portion configured as a tubular member extending generally in a direction perpendicular to an axial direction of the scroll compressor to define the second channel section,

the third channel section extends to the first abutment surface and forms a first opening at the first abutment surface,

one end of the internal connection portion is connected with the external connection portion, and the other end of the internal connection portion comprises a second abutting surface abutted against the first abutting surface, so that the second channel section is connected with the first opening.

6. The scroll compressor of claim 3, wherein:

the enhanced vapor injection joint device comprises an external connection part and an internal connection part, wherein the first channel section is arranged in the external connection part, the internal connection part is a cover-shaped component which extends along the direction which is vertical to the axial direction of the scroll compressor, the internal connection part is provided with a second abutting surface which abuts against the first abutting surface, a channel is formed at the first abutting surface and/or the second abutting surface, so that the second channel section is limited between the internal connection part and the fixed scroll,

the third channel segment extends to the first abutment surface and forms a first opening at the first abutment surface, the first opening being located in the channel.

7. The scroll compressor of claim 6, wherein the circumscribing section includes a horizontal bore and a vertical bore that make up the first passage section, one end of the vertical bore being connected to the horizontal bore and the other end of the vertical bore being connected to the channel.

8. The scroll compressor of any one of claims 4 to 7, wherein the enhanced vapor injection fitting arrangement further comprises a sealing gasket disposed between the first and second abutment surfaces to form a seal therebetween.

9. The scroll compressor of any one of claims 3 to 7, wherein the second passage section comprises first and second branches extending in different directions, the enhanced vapor injection fluid entering the third passage section via the first and second branches, respectively.

10. The scroll compressor of any one of claims 2 to 7, wherein the first abutment surface is configured to extend generally in an axial direction of the scroll compressor or generally in a direction perpendicular to the axial direction of the scroll compressor.

11. The scroll compressor of any one of claims 2 to 7, wherein the receptacle is configured as a recess provided at the second end face of the end plate and/or the radially outer surface of the circumferential wall.

12. The scroll compressor of any one of claims 2 to 7, wherein the receptacle is disposed within the low pressure region or a high pressure region.

13. The scroll compressor of any one of claims 4 to 7, wherein the first opening is configured as one or more.

14. The scroll compressor of any one of claims 1 to 7, wherein:

the seal portion is configured as a flange protruding from a radially outer surface of the circumferential wall, the flange being in interference fit with the housing; or alternatively

The seal portion is configured to include a groove recessed from a radially outer surface of the circumferential wall and a seal member accommodated in the groove, the seal member abutting the housing.

15. The scroll compressor of any one of claims 1 to 7, wherein the scroll compressor is a large discharge scroll compressor.

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