Compressor

Abstract

A compressor may include a first scroll, a second scroll, and a valve assembly. The second scroll may include a discharge passage. The valve assembly may include a valve housing fixed relative to the second scroll and a valve member movably received in the valve housing. The valve housing may include a plurality of sloped orifices that are sloped relative to a direction in which the valve member moves between the open and closed positions. The valve member is movable relative to the valve housing and the valve retainer between an open position and a closed position. When the valve member is in the open position, fluid is permitted to flow through the discharge passage and an angled orifice in the valve housing. When the valve member is in the closed position, fluid flows through the discharge passage and the ramped orifice is restricted.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of and priority to Indian Patent Application No. 202321053150 filed on August 8, 2023. The entire disclosure of the above application is incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a compressor having a shutdown valve assembly. Background Art

[0004] This section provides background information related to the present disclosure and is not necessarily prior art.

[0005] A climate control system, such as a heat pump system, a refrigeration system, or an air conditioning system, may include a fluid circuit having an outdoor heat exchanger, an indoor heat exchanger, an expansion device disposed between the indoor heat exchanger and the outdoor heat exchanger, and one or more compressors that circulate a working fluid (e.g., a refrigerant) between the indoor heat exchanger and the outdoor heat exchanger. Efficient and reliable operation of the one or more compressors is desired to ensure that the climate control system in which the one or more compressors are installed can effectively and efficiently provide cooling and / or heating effects as required. Summary of the invention

[0006] This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.

[0007] In one aspect, the present disclosure provides a compressor comprising a first scroll, a second scroll and a valve assembly (e.g., a shutdown valve assembly). The first scroll comprises a first end plate and a first spiral scroll extending from the first end plate. The second scroll comprises a second end plate and a second spiral scroll extending from the second end plate, and the second spiral scroll meshes with the first spiral scroll to define a fluid pocket between the second spiral scroll and the first spiral scroll. The second end plate may include a discharge passage and a discharge recess. The valve assembly may be at least partially disposed in the discharge recess and may include a valve housing, a valve retainer, and a valve member. The valve housing may be fixed relative to the second scroll. The valve retainer may be fixed relative to the valve housing. The valve member may be received in the valve housing in a movably manner. The valve member may move between an open position and a closed position relative to the valve housing and the valve retainer. When the valve member is in the open position, the fluid is allowed to flow through the discharge passage and the valve assembly. When the valve member is in the closed position, the fluid flows through the discharge passage and the valve assembly is restricted. The valve housing may include a plurality of inclined apertures that are inclined relative to a direction in which the valve member moves between the open position and the closed position.

[0008] In some configurations of the compressor of the above paragraph, the angled aperture in the valve housing extends between an inner diameter surface of the valve housing and an outer diameter surface of the valve housing.

[0009] In some configurations of the compressor of either or both of the above paragraphs, an opening at an inner diameter surface of the valve housing having an inclined aperture is disposed between the valve member and the discharge passage when the valve member is in the open position.

[0010] In some configurations of the compressor of any one or more of the above paragraphs, a radially outer surface of the valve member covers an opening of the angled aperture when the valve member is in the closed position.

[0011] In some configurations of the compressor of any one or more of the above paragraphs, a radially outer surface of the valve member slidingly contacts an inner diameter surface of the valve housing when the valve member moves between the open position and the closed position.

[0012] In some configurations of the compressor of any one or more of the above paragraphs, the valve housing includes a gas return orifice.

[0013] In some configurations of the compressor of any one or more of the above paragraphs, the gas return orifice and the angled orifice are in fluid communication with a discharge pressure region (eg, a discharge chamber) of the compressor.

[0014] In some configurations of the compressor of any one or more of the above paragraphs, the valve housing includes a protrusion that extends into the interior volume of the valve housing and includes an axial end surface that defines a stop for the valve member in the open position.

[0015] In some configurations of the compressor of any one or more of the above paragraphs, the gas return aperture extends through an axial end surface of the projection.

[0016] In some configurations of the compressor of any one or more of the above paragraphs, the valve retainer defines a valve seat that contacts the valve member when the valve member is in the closed position.

[0017] In some configurations of the compressor of any one or more of the above paragraphs, the valve seat defines an opening in fluid communication with the discharge passage.

[0018] In some configurations of the compressor of any one or more of the above paragraphs, the valve housing includes a base portion and a body portion.

[0019] In some configurations of the compressor of any one or more of the above paragraphs, the base portion has a larger diameter than the body portion and fixedly engages an inner diameter surface of the hub of the second scroll.

[0020] In some configurations of the compressor of any one or more of the above paragraphs, the angled aperture is disposed in the body portion.

[0021] In some configurations of the compressor of any one or more of the above paragraphs, the body portion and the inner diameter surface of the hub cooperate to define an annular gas flow path in fluid communication with the angled orifice and the discharge passage when the valve member is in the open position.

[0022] In another aspect, the present disclosure provides a compressor comprising a first scroll, a second scroll and a valve assembly (e.g., a shutdown valve assembly). The first scroll comprises a first end plate and a first spiral scroll extending from the first end plate. The second scroll comprises a second end plate and a second spiral scroll extending from the second end plate, and the second spiral scroll meshes with the first spiral scroll to define a fluid pocket between the second spiral scroll and the first spiral scroll. The second end plate may include a discharge passage. The valve assembly may include a valve housing fixed relative to the second scroll, a valve retainer fixed relative to the valve housing, and a valve member movably received in the valve housing. The valve housing may include a plurality of inclined orifices, the plurality of inclined orifices being inclined relative to the direction in which the valve member moves between an open position and a closed position. The valve member may move between an open position and a closed position relative to the valve housing and the valve retainer. When the valve member is in an open position, the fluid is allowed to flow through the discharge passage and flows through the inclined orifice in the valve housing. When the valve member is in a closed position, the fluid flows through the discharge passage and the inclined orifice is restricted.

[0023] In some configurations of the compressor of the above paragraph, the angled aperture in the valve housing extends between an inner diameter surface of the valve housing and an outer diameter surface of the valve housing.

[0024] In some configurations of the compressor of either or both of the above paragraphs, an opening at an inner diameter surface of the valve housing having an inclined aperture is disposed between the valve member and the discharge passage when the valve member is in the open position.

[0025] In some configurations of the compressor of any one or more of the above paragraphs, a radially outer surface of the valve member covers an opening of the angled aperture when the valve member is in the closed position.

[0026] In some configurations of the compressor of any one or more of the above paragraphs, a radially outer surface of the valve member slidingly contacts an inner diameter surface of the valve housing when the valve member moves between the open position and the closed position.

[0027] In some configurations of the compressor of any one or more of the above paragraphs, the valve housing includes a gas return orifice.

[0028] In some configurations of the compressor of any one or more of the above paragraphs, the gas return orifice and the angled orifice are in fluid communication with a discharge pressure region (eg, a discharge chamber) of the compressor.

[0029] In some configurations of the compressor of any one or more of the above paragraphs, the valve housing includes a protrusion that extends into the interior volume of the valve housing and includes an axial end surface that defines a stop for the valve member in the open position.

[0030] In some configurations of the compressor of any one or more of the above paragraphs, the gas return aperture extends through an axial end surface of the projection.

[0031] In some configurations of the compressor of any one or more of the above paragraphs, the valve retainer defines a valve seat that contacts the valve member when the valve member is in the closed position.

[0032] In some configurations of the compressor of any one or more of the above paragraphs, the valve seat defines an opening in fluid communication with the discharge passage.

[0033] In some configurations of the compressor of any one or more of the above paragraphs, the valve housing includes a base portion and a body portion.

[0034] In some configurations of the compressor of any one or more of the above paragraphs, the base portion has a larger diameter than the body portion and fixedly engages an inner diameter surface of the hub of the second scroll.

[0035] In some configurations of the compressor of any one or more of the above paragraphs, the angled aperture is disposed in the body portion.

[0036] In some configurations of the compressor of any one or more of the above paragraphs, the body portion and the inner diameter surface of the hub cooperate to define an annular gas flow path in fluid communication with the angled orifice and the discharge passage when the valve member is in the open position.

[0037] Further areas of applicability will become apparent from the description provided herein.The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

[0039] Figure 1 is a cross-sectional view of a compressor having a shutdown valve assembly according to the principles of the present disclosure;

[0040] Figure 2 yes Figure 1 A cross-sectional view of a scroll and a shutdown valve assembly of a compressor of FIG. 1 , wherein the shutdown valve assembly is in a closed position;

[0041] Figure 3 yes Figure 1 A cross-sectional view of a scroll and a shutdown valve assembly of a compressor of FIG. 1 , wherein the shutdown valve assembly is in an open position;

[0042] Figure 4 yes Figures 1 to 3 An exploded view of the shut-off valve assembly;

[0043] Figure 5 is a cross-sectional view of a scroll and another shutoff valve assembly in a closed position;

[0044] Figure 6 is swirled and in open position Figure 5 A cross-sectional view of a shutdown valve assembly;

[0045] Figure 7 yes Figure 5 and Figure 6 A three-dimensional view of a shutdown valve assembly;

[0046] Figure 8 yes Figures 5 to 7 An exploded view of the shut-off valve assembly;

[0047] Fig. 9 is a cross-sectional view of a scroll and yet another shut-off valve assembly in a closed position;

[0048] Fig.10 is swirled and in open position Fig. 9 A cross-sectional view of a shutdown valve assembly;

[0049] Fig.11 yes Fig. 9 and Fig.10 An exploded view of the shut-off valve assembly;

[0050] Fig.12 yes Figures 9 to 11 A three-dimensional view of a valve housing of a shutdown valve assembly;

[0051] Fig.13 is a cross-sectional view of a scroll and yet another shut-off valve assembly in a closed position;

[0052] Fig.14 is swirled and in open position Fig.13 A cross-sectional view of a shutdown valve assembly;

[0053] Fig.15 yes Fig.13 and Fig.14 A three-dimensional view of a shutdown valve assembly;

[0054] Fig.16 yes Figures 13 to 15 An exploded view of the shut-off valve assembly; and

[0055] Fig.17 yes Figures 13 to 16 A three-dimensional view of the valve housing of the shutdown valve assembly.

[0056] Corresponding reference numerals indicate corresponding parts throughout the several views of the drawings. DETAILED DESCRIPTION

[0057] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0058] Example embodiments are provided so that the present disclosure will be thorough and will fully convey the scope to those skilled in the art. Many specific details such as examples of specific components, devices and methods are set forth to provide a thorough understanding of the embodiments of the present disclosure. It will be readily understood by those skilled in the art that specific details need not be employed, and that example embodiments may be implemented in many different forms, and none of them should be construed as limiting the scope of the present disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

[0059] The terms used herein are only used to describe the purpose of exemplary embodiments, and are not intended to be restrictive. As used herein, unless the context clearly indicates otherwise, the singular forms "one", "a kind of" and "the" may also be intended to include plural forms. The terms "include", "include", "contain" and "have" are inclusive and therefore specify the existence of the features, wholes, steps, operations, elements and / or parts described, but do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, parts and / or their groups. Unless specifically indicated as the order of execution, the method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the specific order discussed or illustrated. It should also be understood that additional or alternative steps may be adopted.

[0060] When an element or layer is referred to as "on another element or layer", "engaged to", "connected to" or "coupled to" another element or layer, the element or layer may be directly on, directly engaged to, directly connected to or directly coupled to another element or layer, or there may be an intermediate element or layer. In contrast, when an element is referred to as "directly on another element or layer", "directly engaged to", "directly connected to" or "directly coupled to" another element or layer, there may be no intermediate element or layer. Other words used to describe the relationship between elements (e.g., "between" and "directly between", "adjacent" and "directly adjacent", etc.) should be interpreted in a similar manner. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0061] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless clearly indicated by the context, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in this article. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0062] For ease of description, spatially relative terms such as "inside", "outside", "below", "below", "lower", "above", "upper", etc. may be used herein to describe the relationship between one element or feature and another (other) element or feature as illustrated in the accompanying drawings. Spatially relative terms may be intended to cover different orientations of the device in use or operation other than the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, the elements described as being "below" or "below" other elements or features will then be oriented "above" the other elements or features. Therefore, the example term "below" can cover both the above and below orientations. The device can be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein can be interpreted accordingly.

[0063] Reference Figures 1 to 4 , a compressor 10 is provided, which may include a sealed housing assembly 12 , a first bearing housing assembly 14 and a second bearing housing assembly 16 , a motor assembly 18 , a compression mechanism 20 , a floating seal assembly 22 , and a shutdown valve assembly 24 .

[0064] The housing assembly 12 may form a compressor housing and may include a cylindrical housing 32, an end cap 34 at an upper end of the housing assembly 12, a laterally extending partition 36, and a base 38 at a lower end of the housing assembly 12. The end cap 34 and the partition 36 may define a discharge chamber 40. The partition 36 may separate the discharge chamber 40 from the suction chamber 42. A discharge passage 44 may extend through the partition 36 to provide communication between the compression mechanism 20 and the discharge chamber 40. A suction fitting 45 may provide fluid communication between the suction chamber 42 and a low side of a climate control system to which the compressor 10 is mounted. The discharge fitting 46 may provide fluid communication between the discharge chamber 40 and a high side of a climate control system to which the compressor 10 is mounted.

[0065] The first bearing housing assembly 14 can be fixed relative to the housing 32 and can include a first bearing housing 48 and a first bearing 50. The first bearing housing 48 can axially support the compression mechanism 20 and can house the first bearing 50 therein. The first bearing housing 48 can include a plurality of radially extending arms that engage the housing 32. The second bearing housing assembly 16 can be fixed relative to the housing 32 and can include a second bearing housing 49 and a second bearing 51.

[0066] The motor assembly 18 may include a motor stator 60, a rotor 62, and a drive shaft 64. The motor stator 60 may be press-fit into the housing 32. The rotor 62 may be press-fit onto the drive shaft 64 and may transmit rotational power to the drive shaft 64. The drive shaft 64 may be rotatably supported by the first bearing housing assembly 14 and the second bearing housing assembly 16. The drive shaft 64 may include an eccentric crank pin 66 having a flat surface located on the eccentric crank pin 66. The body 69 of the drive shaft 64 may be rotatably supported by the first bearing 50 and the second bearing 51 and the first bearing housing assembly 48 and the second bearing housing assembly 49.

[0067] The compression mechanism 20 may include an orbiting scroll 70 and a fixed scroll 72. The orbiting scroll 70 may include an end plate 74 and a spiral scroll 76 extending from the end plate 74. A cylindrical hub 80 may protrude downward from the end plate 74 and may include a drive bushing 82 disposed in the cylindrical hub. A drive bearing 81 may also be disposed in the hub 80 and may surround the drive bushing 82 and the crank pin 66 (i.e., the drive bearing 81 may be radially disposed between the hub 80 and the drive bushing 82). The drive bushing 82 may include an inner hole in which the crank pin 66 is driven. The crank pin flat portion may driveably engage a flat surface in a portion of the inner hole to provide a radially compliant drive arrangement. An Oldham coupling 84 may engage with the orbiting scroll 70 and the first bearing housing 48 to prevent relative rotation between the orbiting scroll 70 and the fixed scroll 72. Alternatively, an Oldham coupling 84 may engage with the orbiting scroll 70 and the fixed scroll 72 to prevent relative rotation between the orbiting scroll 70 and the fixed scroll 72.

[0068] The fixed scroll 72 may include an end plate 86 and a spiral wrap 88 protruding downward from the end plate 86. The spiral wrap 88 may meshingly engage the spiral wrap 76 of the movable scroll 70, thereby creating a series of moving fluid pockets (i.e., compression pockets). The fluid pockets defined by the spiral wraps 76, 88 may decrease in volume as the fluid pockets move from a radially outer position 111 (at suction pressure) to a radially intermediate position 113 (at intermediate pressure), to a radially inner position 115 (at discharge pressure) throughout the compression cycle of the compression mechanism 20.

[0069] The end plate 86 may include a discharge passage 90, an intermediate pressure passage (or bias passage) 92, an annular recess 94, and a discharge recess 95. The discharge passage 90 communicates with one of the fluid pockets at a radially inner position 115 and allows compressed working fluid (at a discharge pressure) to flow through the discharge passage 44 in the partition 36 and into the discharge chamber 40. The shutdown valve assembly 24 may be disposed within the discharge recess 95 to allow fluid to flow from the fluid pocket at the radially inner position 115 to the discharge chamber 40 and to prevent or restrict fluid from flowing from the discharge chamber 40 to the fluid pocket at the radially inner position 115.

[0070] The intermediate pressure passage 92 may provide communication between one of the fluid pockets at the radially intermediate position 113 and the annular recess 94. The annular recess 94 may surround (ie, surround) the discharge recess 95. Figure 2 and Figure 3As shown in , the annular recess 94 may include a first diameter surface 96 and a second diameter surface 98. The first diameter surface 96 surrounds the discharge recess 95, and the second diameter surface 98 surrounds the first diameter surface 96 and the discharge recess 95 (that is, the second diameter surface 98 is arranged radially outside relative to the first diameter surface 96). The end plate 86 may include an annular hub 100, which defines the annular recess 94 and the discharge recess 95. That is, the first diameter surface 96 is the outer diameter surface of the annular hub 100, and the discharge recess 95 defines the inner diameter surface 101 of the annular hub 100. The discharge recess 95 extends through the annular hub 100 and communicates with the discharge passage 90.

[0071] The annular recess 94 can at least partially receive the floating seal assembly 22 and can cooperate with the floating seal assembly 22 to define an annular bias chamber 102 ( Figure 1 ). The floating seal assembly 22 sealingly engages the first and second diameter surfaces 96, 98 and the divider 36. In this manner, the floating seal assembly 22 fluidly isolates the bias chamber 102 from the suction chamber 42 and the discharge chamber 40, and fluidly isolates the suction chamber 42 from the discharge chamber 40.

[0072] The bias chamber 102 receives an intermediate pressure fluid (e.g., a fluid at a pressure less than the discharge pressure and greater than the suction pressure) from a fluid pocket located in the intermediate position 113 through the intermediate pressure passage 92. The pressure difference between the intermediate pressure fluid in the bias chamber 102 and the fluid in the suction chamber 42 exerts a net axial biasing force on the fixed scroll 72, thereby urging the fixed scroll 72 toward the orbiting scroll 70 in an axial direction (i.e., in a direction along the axis of rotation of the drive shaft 64 or parallel to the axis of rotation of the drive shaft 56). In this manner, the tip of the spiral wrap 88 of the fixed scroll 72 is forced into sealing engagement with the end plate 74 of the orbiting scroll 70, and the end plate 86 of the fixed scroll 72 is forced into sealing engagement with the tip of the spiral wrap 76 of the orbiting scroll 70.

[0073] like Figures 2 to 4 As shown in FIG. 1 , the shutdown valve assembly 24 may include a valve housing 110, a retainer 112, and a valve member 114. The valve member 114 may be in a closed position ( Figure 2 ) and the open position ( Figure 3). When the valve member 114 is in the open position, the working fluid is allowed to flow through the shutdown valve assembly 24 between the discharge passage 90 and the discharge chamber 40. When the valve member 114 is in the closed position, the working fluid is restricted or prevented from flowing through the shutdown valve assembly 24, thereby restricting or preventing the fluid from flowing between the discharge passage 90 and the discharge chamber 40. The pressure differential between the discharge passage 90 and the discharge chamber 40 causes the valve member 114 to move between the open position and the closed position.

[0074] The valve housing 110 may be a cylindrical cup-shaped member and may include a base portion 116 and a body portion 118. The base portion 116 may define a first diameter and may fixedly engage the inner diameter surface 101 of the hub 100 (e.g., via threaded engagement, press fit, and / or other means). The body portion 118 may extend axially upward from an axial end of the base portion 116. The body portion 118 may define a second diameter that is smaller than the first diameter of the base portion 116, such that a radially outermost diameter surface 120 of the body portion 118 is radially spaced from the inner diameter surface 101 of the hub 100. In this manner, the body portion 118 and the hub 100 define an annular gas flow path 122 radially disposed between the inner diameter surface 101 of the hub 100 and the outermost diameter surface 120 of the body portion 118.

[0075] The valve housing 110 also includes a plurality of orifices 124 extending generally radially through the body portion 118 to provide fluid communication between the exhaust passage 90 and the annular gas flow path 122. The orifices 124 may be inclined. For example, the longitudinal axis of each orifice 124 may be disposed at a non-parallel and non-perpendicular angle (e.g., a 45 degree angle) relative to the axis of rotation of the drive shaft 64 and relative to the direction in which the valve member 114 moves between the open position and the closed position. The orifices 124 may extend through the inner diameter surface 121 and the outermost diameter surface 120 of the body portion 118 of the valve housing 110. As Figure 2 As shown in , when the valve member 114 is in the closed position, the valve member 114 blocks the orifice 124 of the valve housing 110 to prevent fluid communication between the exhaust passage 90 and the annular gas flow path 122. Figure 3 As shown in , when the valve member 114 is in the open position, the valve member 114 exposes the orifice 124 (ie, the orifice 124 is disposed between the valve member 114 and the exhaust passage 90 ) to allow fluid communication between the exhaust passage 90 and the annular gas flow path 122 .

[0076] The axial end face 126 of the body portion 118 of the valve housing 110 extends radially inward relative to the radially outermost diameter surface 120 and the inner diameter surface 121 of the body portion 118. The axial end face 126 is provided at an axial end of the body portion 118 opposite to the base portion 116 of the valve housing 110. The projection 128 extends from the axial end face 126 in an axial direction into the interior volume 130 of the valve housing 110 (i.e., the interior volume 130 defined by the inner diameter surface 121). That is, the projection 128 extends from the axial end face 126 toward the exhaust passage 90. The projection 128 shown in the figure is cylindrical, but it will be understood that the projection 128 may have any other suitable shape, such as, for example, a frustoconical shape or a rectangular prism shape. The gas return orifice 132 may extend through the projection 128 and the axial end face 126. The axial end surface 134 of the projection 128 (i.e., the axial end of the projection 128 opposite the axial end surface 126) can provide a hard stop for the valve member 114. That is, the axial end surface 134 contacts the valve member 114 in the open position ( Figure 3 ).

[0077] The retainer 112 can be fixed relative to the valve housing 110 and can extend into the interior volume 130 of the valve housing 110. The retainer 112 can be an annular member and include an opening 136 that provides fluid communication between the exhaust passage 90 and the interior volume 130 of the valve housing 110. The retainer 112 can define an annular valve seat 138 that contacts the valve member 114 in the closed position (e.g., Figure 2 When the valve member 114 is in the open position ( Figure 3 ), the valve member 114 is spaced apart from the valve seat 138 so that fluid can flow from the exhaust passage 90 through the opening 136, through the orifice 124, through the annular gas flow path 122 and into the exhaust chamber 40. Figure 3 As shown in FIG. 1 , the orifice 124 is axially disposed between the valve seat 138 and the axial end surface 134 of the protrusion 128 , such that the orifice 124 is axially disposed between the valve seat 138 and the valve member 114 when the valve member 114 is in the open position.

[0078] The valve member 114 shown in the figure is generally cup-shaped and has a U-shaped cross-section. The valve member 114 may include a disc-shaped body 140 and an annular collar 142 extending axially from the body 140. When the valve member 114 is in the open position ( Figure 3 ), one side of the body 140 contacts the axial end surface 134 of the projection 128, and when the valve member 114 is in the closed position ( Figure 2), the opposite side of the body 140 contacts the valve seat 138 of the retainer 112. The annular collar 142 of the valve member 114 can be in sliding contact with the inner diameter surface 121 of the valve housing 110, so that when the valve member 114 moves between the open position and the closed position, the inner diameter surface 121 of the valve housing 110 serves as a guide surface. When the valve member 114 is in the open position, the annular collar 142 can be received in the space radially between the inner diameter surface 121 of the valve housing 110 and the protrusion 128. In some configurations, the valve member 114 can be completely disc-shaped and can not include the annular collar 142.

[0079] During normal operation of the compressor 10 (e.g., during steady-state operation after startup or during any other operating condition in which the working fluid in the fluid pocket at the radially inner location 115 is at a higher pressure than the working fluid in the discharge chamber 40), the scrolls 70, 72 can cooperate to compress the working fluid (e.g., from suction pressure to discharge pressure). The working fluid in the fluid pocket at the radially inner location 115 (e.g., at discharge pressure) is forced through the discharge passage 90 and through the opening 136 in the retainer 112 to force the valve member 114 into the open position ( Figure 3 ). With valve member 114 in the open position, compressed working fluid may flow from opening 136, through orifice 124 in valve housing 110, through annular gas flow path 122, through discharge passage 44 of divider 36, and into discharge chamber 40. From discharge chamber 40, compressed working fluid may flow through discharge fitting 46 and into the high side of the climate control system where the compressor is mounted.

[0080] When the compressor 10 is shut down or when the compressor 10 is switched to a low capacity or zero capacity operating state (or during any other operating condition in which the working fluid in the fluid pocket at the radially inner position 115 is at a lower pressure than the working fluid in the discharge chamber 40), the working fluid from the discharge chamber 40 (or the working fluid at the discharge passage 44 of the partition 36) can flow through the gas return orifice 132 of the valve housing 110 and can force the valve member 114 into the closed position ( Figure 2 As described above, when the valve member 114 is in the closed position, the orifice 124 in the valve housing 110 is blocked and the opening 136 in the valve retainer 112 is blocked, thereby restricting or preventing fluid flow through the discharge passage 90 (i.e., reducing or preventing reverse rotation of the orbiting scroll 70).

[0081] The shutdown valve assembly 24 described herein has several advantages over the shutdown valves of the prior art. For example, the structure of the valve housing 110 and the valve member 114 provides a smaller surface area where the valve member 114 and the valve housing 110 contact each other. This reduced contact area reduces the lateral oil adhesion between the valve member 114 and the inner diameter surface 121 of the valve housing 110. In addition, the relatively small contact area between the valve member 114 and the valve retainer 112 also reduces the adhesion between the valve member 114 and the valve retainer 112. In addition, the positioning of the orifice 124 along the inner diameter 121 of the valve housing and the proximity of the orifice 124 to the valve seat 138 allow for a faster response time of the shutdown valve assembly 24 during shutdown of the compressor 10 (which reduces the backflow of the working fluid during shutdown and reduces the reverse rotation of the movable scroll 70). In addition, the structure of the valve housing 110, the valve retainer 112 and the valve member 114 improves the sound performance (i.e., allows for quieter operation). Additionally, a flat valve seat 138 (as opposed to a conical shape) may reduce Poiseuille flow effects.

[0082] Reference Figures 5 to 8 Another shutdown valve assembly 224 is provided, which can be incorporated into the compressor 10 in place of the shutdown valve assembly 24. The shutdown valve assembly 224 is at least partially disposed in the discharge recess 95 of the fixed scroll 72, and the shutdown valve assembly 224 is operable to selectively allow and prevent fluid from flowing through the discharge passage 90.

[0083] The shutdown valve assembly 224 may include a valve housing 310, a retainer 312, and a valve member 314. The valve member 314 may be in a closed position ( Figure 5 ) and the open position ( Figure 6 ) between the discharge passage 90 and the discharge chamber 40. When the valve member 314 is in the open position, the working fluid is allowed to flow through the shutdown valve assembly 224 between the discharge passage 90 and the discharge chamber 40. When the valve member 314 is in the closed position, the working fluid is restricted or prevented from flowing through the shutdown valve assembly 224, thereby restricting or preventing the fluid from flowing between the discharge passage 90 and the discharge chamber 40. The pressure difference between the discharge passage 90 and the discharge chamber 40 causes the valve member 314 to move between the open position and the closed position.

[0084] The valve retainer 312 may be a generally cup-shaped body having a radially outer surface 315 that may be fixedly engaged (e.g., via threaded engagement, press fit, welding, and / or other means) with the inner diameter surface 101 of the hub 100 of the non-orbiting scroll 72. An axial end of the valve retainer 312 may define a valve seat 338 and an opening 336 extending through the valve seat 338.

[0085] The valve housing 310 may include a housing body 318 and a plurality of projections or protrusions 319 extending radially outward from the housing body 318. The housing body 318 may be generally cylindrical and may include a recess 320 ( Figure 5 and Figure 6 ). The recess 320 reciprocally receives the valve member 314 therein. The surface 321 defining the axial end of the recess 320 serves as a valve stopper to limit the upward movement of the valve member 314 and to define the fully open position of the valve member 314. The diameter surface 322 defining the recess 320 can serve as a guide surface to guide the movement of the valve member 314 between the open position and the closed position.

[0086] The protrusion 319 of the valve housing 310 can be fixedly engaged with the inner diameter surface 339 of the valve retainer 312 (e.g., via threaded engagement, press fit, welding, and / or other means). The housing body 318 can extend axially upward and beyond the valve retainer 312. The outer diameter surface 323 of the housing body 318 is radially spaced from the inner diameter surface 339 of the valve retainer 312 and the inner diameter surface 101 of the hub 100. In this manner, the housing body 318, the hub 100, and the valve retainer 312 define an annular gas flow path 326 radially disposed between the inner diameter surface 101 of the hub 100 and the outer diameter surface 323 of the housing body 318. When the valve member 314 is in the open position ( Figure 6 ), the working fluid flows through the annular gas flow path 326 (i.e., flows from the exhaust passage 90 to the exhaust chamber 40). In the closed position ( Figure 5 ), the valve member 314 prevents fluid from flowing from the discharge chamber 40 to the discharge passage 90 through the annular gas flow path 316.

[0087] The housing body 318 of the valve housing 310 may also include a plurality of apertures 324. The apertures 324 may extend through an outer diameter surface 323 of the housing body 318 and be in fluid communication with the recess 320. The apertures 324 may be angled (i.e., the longitudinal axis of each aperture 324 may be disposed at a non-parallel and non-perpendicular angle (e.g., a 45 degree angle) relative to the axis of rotation of the drive shaft 64). The central aperture 325 may extend axially through an axial end 327 of the housing body 318 and may be in fluid communication with the apertures 324 and the recess 320. Figure 5 and Figure 6 As shown in , the axial end portion 327 may protrude further upward than the axial end portion of the hub 100 of the fixed scroll 72 .

[0088] The valve member 314 shown in the figure is generally cup-shaped and has a U-shaped cross-section. The valve member 314 may include a disc-shaped body 340 and an annular collar 342 extending axially from the body 340. When the valve member 314 is in the open position ( Figure 6 ), the axial end of the collar 342 contacts the surface 321 of the valve housing 310, and when the valve member 314 is in the closed position ( Figure 5 ), the opposite axial end of the valve member 314 contacts the valve seat 338 of the retainer 312. The annular collar 342 of the valve member 314 can be in sliding contact with the inner diameter surface 322 of the valve housing 310, so that when the valve member 314 moves between the open position and the closed position, the inner diameter surface 322 of the valve housing 310 acts as a guide surface. In some configurations, the valve member 314 can be completely disc-shaped and can not include the annular collar 342.

[0089] As described above, during normal operation of the compressor 10, the scrolls 70, 72 compress the working fluid (e.g., from suction pressure to discharge pressure). The working fluid in the fluid pocket at the radially inner position 115 (e.g., at discharge pressure) is forced through the discharge passage 90 and through the opening 336 in the retainer 312 to force the valve member 314 into the open position ( Figure 6 With the valve member 314 in the open position, compressed working fluid may flow from the opening 336 , through the annular gas flow path 326 , through the discharge passage 44 of the divider 36 , and into the discharge chamber 40 .

[0090] When the compressor 10 is shut down or when the compressor 10 is switched to a low capacity or zero capacity operating state (or during any other operating condition in which the working fluid in the fluid pocket at the radially inner position 115 is at a lower pressure than the working fluid in the discharge chamber 40), the working fluid from the discharge chamber 40 (or the working fluid at the discharge passage 44 of the partition 36) can flow through the orifices 324, 325 of the valve housing 310 and can force the valve member 314 into the closed position ( Figure 5 As described above, when the valve member 314 is in the closed position, the annular gas flow path 326 is blocked and the opening 336 in the valve retainer 312 is blocked, thereby restricting or preventing fluid flow through the discharge passage 90 (i.e., reducing or preventing reverse rotation of the orbiting scroll 70).

[0091] The shutdown valve assembly 224 described herein has several advantages over the shutdown valves of the prior art. For example, the structure of the valve housing 310 and the valve member 314 provides a smaller surface area of ​​contact between the valve member 314 and the valve housing 310. This reduced contact area reduces the lateral oil adhesion between the valve member 314 and the inner diameter surface 322 of the valve housing 310. In addition, the relatively small contact area between the valve member 314 and the valve retainer 312 also reduces the adhesion between the valve member 314 and the valve retainer 312. In addition, the oblique positioning of the orifice 324 in the valve housing 310 (i.e., such that the orifice 324 extends through the outer diameter surface 323 of the valve housing 310) allows fluid flow through the opening of the orifice 324 (i.e., the fluid flows upward through the annular gas flow path 326) to produce a venturi effect that tends to keep the valve member 314 in an open position and in contact with the surface 321. In addition, the shutdown valve assembly 224 achieves a faster response time (i.e., faster movement between the open position and the closed position) during shutdown of the compressor 10 (which reduces backflow of the working fluid during shutdown and reduces reverse rotation of the orbiting scroll 70). In addition, the structure of the valve housing 310, the valve retainer 312, and the valve member 314 improves sound performance (i.e., allows for quieter operation). In addition, the flat valve seat 338 (compared to a conical shape) can reduce the Poiseuille flow effect.

[0092] Reference Figures 9 to 12 Another shutdown valve assembly 424 is provided, which can be incorporated into the compressor 10 instead of the shutdown valve assembly 24, 224. The shutdown valve assembly 424 is partially disposed in the discharge recess 95 of the fixed scroll 72, and the shutdown valve assembly 424 can be operated to selectively allow and prevent fluid from flowing through the discharge passage 90.

[0093] The shutdown valve assembly 424 may include a valve housing 510, a retainer 512, and a valve member 514. The valve member 514 may be in a closed position ( Fig. 9 ) and the open position ( Fig.10 ). When the valve member 514 is in the open position, the working fluid is allowed to flow through the shutdown valve assembly 424 between the discharge passage 90 and the discharge chamber 40. When the valve member 514 is in the closed position, the working fluid is restricted or prevented from flowing through the shutdown valve assembly 424, thereby restricting or preventing the fluid from flowing between the discharge passage 90 and the discharge chamber 40. The pressure difference between the discharge passage 90 and the discharge chamber 40 causes the valve member 514 to move between the open position and the closed position.

[0094] The valve housing 510 may be a generally cylindrical body having an inner diameter surface 515 and a radially outermost diameter surface 516 that is fixedly engaged with the inner diameter surface 101 of the hub 100 of the fixed scroll 72 (e.g., via threaded engagement, press fit, and / or other means). An axial end surface 526 of the valve housing 510 extends radially inward from the diameter surface 516. The axial end surface 526 may include an annular protrusion 528 that extends from the axial end surface 526 in an axial direction toward the discharge chamber 40 (i.e., the annular protrusion 528 extends axially outside the hub 100 so that the distal axial end of the annular protrusion 528 is axially disposed above the axial end of the hub 100).

[0095] The projection 529 extends from the axial end face 526 in an axial direction (i.e., in a direction opposite to the direction in which the annular projection 528 extends) into the interior volume 530 of the valve housing 510 (i.e., the interior volume 530 defined by the inner diameter surface 515). That is, the projection 529 extends from the axial end face 526 toward the exhaust passage 90. The projection 529 shown in the figure is cylindrical, but it will be understood that the projection 529 can have any other suitable shape, such as, for example, a frustoconical or rectangular prism. The projection 529 can include a recess 532 that reciprocally receives the valve member 514. The orifice 534 can extend through the projections 528, 529 and can be in fluid communication with the recess 532. The outer diameter surface of the projection 529 can be radially spaced from the inner diameter surface 515 of the valve housing 510, so that an annular gas flow path 536 is formed between the outer diameter surface of the projection 529 and the inner diameter surface 515 of the valve housing 510. A curved aperture 538 formed in the axial end face 526 of the valve housing 510 provides fluid communication between the annular gas flow path 536 and the discharge chamber 40 .

[0096] The retainer 512 can be fixed relative to the valve housing 510 and can extend into the interior volume 530 of the valve housing 510. The retainer 512 can be an annular member and include an opening 550 that provides fluid communication between the exhaust passage 90 and the interior volume 530 of the valve housing 510. The retainer 512 can define an annular valve seat 552 that contacts the valve member 514 (e.g., in the closed position). Fig. 9 When the valve member 514 is in the open position ( Fig.10 ), the valve member 514 is spaced apart from the valve seat 552 so that fluid can flow from the exhaust passage 90 through the opening 550, through the annular gas flow path 536, through the curved orifice 538 and into the exhaust chamber 40.

[0097] The valve member 514 may include a disc-shaped body 560 and a flange 562 extending radially outward from the body 560. The body 560 is received in the recess 532 of the valve housing 510 and is in sliding contact with the inner diameter surface defining the recess 532. When the valve member 514 is in the open position, the flange 562 contacts the axial end of the protrusion 529. When the valve member 514 is in the closed position, the flange 562 contacts the valve seat 552.

[0098] As described above, during normal operation of the compressor 10, the scrolls 70, 72 compress the working fluid (e.g., from suction pressure to discharge pressure). The working fluid in the fluid pocket at the radially inner position 115 (e.g., at discharge pressure) is forced through the discharge passage 90 and through the opening 550 in the retainer 512 to force the valve member 514 into the open position ( Fig.10 With the valve member 514 in the open position, compressed working fluid may flow from the opening 550 , through the annular gas flow path 536 , through the curved orifice 538 , and into the discharge chamber 40 .

[0099] When the compressor 10 is shut down or when the compressor 10 is switched to a low capacity or zero capacity operating state (or during any other operating condition in which the working fluid in the fluid pocket at the radially inner position 115 is at a lower pressure than the working fluid in the discharge chamber 40), the working fluid from the discharge chamber 40 (or the working fluid at the discharge passage 44 of the partition 36) can flow through the orifice 534 of the valve housing 510 and can force the valve member 514 into the closed position ( Fig. 9 As described above, when the valve member 514 is in the closed position, the annular gas flow path 536 is blocked and the opening 550 in the valve retainer 512 is blocked, thereby restricting or preventing fluid flow through the discharge passage 90 (i.e., reducing or preventing reverse rotation of the orbiting scroll 70).

[0100] The shutdown valve assembly 424 described herein has several advantages over the shutdown valves of the prior art. For example, the structure of the valve housing 510 and the valve member 514 provides a smaller surface area where the valve member 514 and the valve housing 510 contact each other. This reduced contact area reduces the lateral oil adhesion between the valve member 514 and the valve housing 310. In addition, the relatively small contact area between the valve member 514 and the valve retainer 512 also reduces the adhesion between the valve member 514 and the valve retainer 512. In addition, the shutdown valve assembly 424 achieves a faster response time (i.e., faster movement between the open position and the closed position) during shutdown of the compressor 10 (which reduces the backflow of the working fluid during shutdown and reduces the reverse rotation of the movable scroll 70). Additionally, an annular protrusion 528 extending axially above the hub 100 and axially above the curved orifice 538 helps prevent fluid from flowing back through the orifice 534 during normal operating conditions (i.e., conditions where the valve member 514 is in an open position), which reduces rattling of the valve member 514 and allows for quieter operation.

[0101] Reference Figures 13 to 17 Another shutdown valve assembly 624 is provided, which can be incorporated into the compressor 10 in place of the shutdown valve assembly 24, 224, 424. The shutdown valve assembly 624 is at least partially disposed in the discharge recess 95 of the fixed scroll 72, and the shutdown valve assembly 624 is operable to selectively allow and prevent fluid from flowing through the discharge passage 90.

[0102] The shutdown valve assembly 624 may include a valve housing 710, a retainer 712, and a valve member 714. The valve member 714 may be in a closed position ( Fig.13 ) and the open position ( Fig.14 ). When the valve member 714 is in the open position, the working fluid is allowed to flow through the shutdown valve assembly 624 between the discharge passage 90 and the discharge chamber 40. When the valve member 714 is in the closed position, the working fluid is restricted or prevented from flowing through the shutdown valve assembly 624, thereby restricting or preventing the fluid from flowing between the discharge passage 90 and the discharge chamber 40. The pressure difference between the discharge passage 90 and the discharge chamber 40 causes the valve member 714 to move between the open position and the closed position.

[0103] The valve housing 710 can be a generally cylindrical body having an inner surface 715, a radially outermost diameter surface 716, and an annular boss 717. The radially outermost radial surface 716 is fixedly engaged with the inner diameter surface 101 of the hub 100 of the fixed scroll 72 (e.g., via threaded engagement, press fit, and / or other means). The inner surface 715 defines an internal volume 718 of the valve housing 710. The inner surface 715 defines a plurality of scalloped orifices 720 extending through an axial end face 722 of the valve housing 710. The boss 717 includes an opening 724 and defines a valve seat 726. The opening 724 is in fluid communication with the discharge passage 90. The valve seat 726 contacts the valve member 714 in the closed position to prevent fluid from flowing through the opening 724 and the discharge passage 90.

[0104] The valve retainer 712 can be a disc-shaped body having a central aperture 730. The outer diameter surface of the valve retainer 712 can be fixedly engaged with the plurality of guide surfaces 732 of the inner surface 715 (e.g., via threaded engagement, press fit, welding, and / or other means), such as Fig.15 The valve retainer 712 serves as a valve stop that defines a fully open position of the valve member 714 (ie, the valve member 714 contacts the valve retainer 712 in the open position).

[0105] The valve member 714 may be a disc-shaped body. An outer diameter surface 740 of the valve member 714 may contact the guide surface 732 of the valve housing 710 in a sliding manner.

[0106] As described above, during normal operation of the compressor 10, the scrolls 70, 72 compress the working fluid (e.g., from suction pressure to discharge pressure). The working fluid in the fluid pocket at the radially inner position 115 (e.g., at discharge pressure) is forced through the discharge passage 90 and through the opening 724 in the valve housing 710 to force the valve member 714 into the open position ( Fig.14 With the valve member 714 in the open position, compressed working fluid may flow from the opening 724 , through the interior volume 718 , through the orifice 720 , and into the discharge chamber 40 .

[0107] When the compressor 10 is shut down or when the compressor 10 is switched to a low capacity or zero capacity operating state (or during any other operating condition in which the working fluid in the fluid pocket at the radially inner position 115 is at a lower pressure than the working fluid in the discharge chamber 40), the working fluid from the discharge chamber 40 (or the working fluid at the discharge passage 44 of the partition 36) can flow through the orifice 730 of the valve retainer 712 and can force the valve member 714 into the closed position ( Fig.13As described above, when the valve member 714 is in the closed position, the opening 724 in the valve housing 710 is blocked, thereby restricting or preventing fluid flow through the discharge passage 90 (ie, reducing or preventing reverse rotation of the orbiting scroll 70 ).

[0108] The shutdown valve assembly 624 described herein has several advantages over the shutdown valves of the prior art. For example, the structure of the valve housing 710 and the valve member 714 provides a smaller surface area where the valve member 714 and the valve housing 710 contact each other. This reduced contact area reduces the lateral oil adhesion between the valve member 714 and the guide surface 732 of the valve housing 710. In addition, the relatively small contact area between the valve member 714 and the valve seat 726 also reduces the adhesion between the valve member 714 and the valve housing 710. In addition, the shutdown valve assembly 624 achieves a faster response time (i.e., faster movement between the open position and the closed position) during the shutdown of the compressor 10 (which reduces the backflow of the working fluid during shutdown and reduces the reverse rotation of the movable scroll 70).

[0109] The foregoing description of the embodiments has been provided for the purpose of illustration and description. The foregoing description is not intended to be exhaustive or to limit the present disclosure. The individual elements or features of a particular embodiment are generally not limited to the particular embodiment, but are interchangeable and can be used for the selected embodiment where applicable, even if not specifically shown or described. The individual elements or features of a particular embodiment may also be changed in many ways. Such variations are not considered to be out of the present disclosure, and all such modifications are intended to be included within the scope of the present disclosure.

Claims

1. A compressor, comprising: a first scroll having a first end plate and a first spiral wrap, the first spiral wrap extending from the first end plate; a second scroll having a second end plate and a second spiral wrap, the second spiral wrap extending from the second end plate and meshing with the first spiral wrap to define a fluid pocket therebetween, wherein the second end plate includes a discharge passage and a discharge recess; and a valve assembly at least partially disposed within the discharge recess and comprising a valve housing fixed relative to the second scroll, a valve retainer fixed relative to the valve housing, and a valve member movably received in the valve housing, in: The valve member is movable relative to the valve housing and the valve holder between an open position and a closed position, When the valve member is in the open position, fluid is allowed to flow through the exhaust passage and the valve assembly, When the valve member is in the closed position, fluid flows through the exhaust passage and the valve assembly is restricted, and The valve housing includes a plurality of inclined apertures that are inclined relative to a direction in which the valve member moves between the open position and the closed position.

2. The compressor according to claim 1, wherein: The angled aperture in the valve housing extends between an inner diameter surface of the valve housing and an outer diameter surface of the valve housing.

3. The compressor according to claim 2, wherein: When the valve member is in the open position, an opening of the inclined aperture at the inner diameter surface of the valve housing is disposed between the valve member and the exhaust passage.

4. The compressor according to claim 3, wherein: A radially outer surface of the valve member covers the opening of the angled aperture when the valve member is in the closed position.

5. The compressor according to claim 4, wherein: The radially outer surface of the valve member slidably contacts the inner diameter surface of the valve housing when the valve member moves between the open position and the closed position.

6. The compressor according to claim 3, wherein: The valve housing includes a gas return orifice, and wherein the gas return orifice and the angled orifice are in fluid communication with a discharge pressure region of the compressor.

7. The compressor according to claim 6, wherein: The valve housing includes a projection extending into an interior volume of the valve housing and including an axial end surface defining a stop for the valve member in the open position.

8. The compressor according to claim 7, wherein: The gas return orifice extends through the axial end surface of the projection.

9. The compressor according to claim 1, wherein: The valve retainer defines a valve seat that contacts the valve member when the valve member is in the closed position, and wherein the valve seat defines an opening in fluid communication with the exhaust passage.

10. The compressor of claim 1, wherein: The valve housing comprises a base portion and a body portion, The base portion has a larger diameter than the body portion and fixedly engages an inner diameter surface of the hub of the second scroll, The inclined aperture is provided in the body portion, and The body portion and the inner diameter surface of the hub cooperate to define an annular gas flow path in fluid communication with the angled orifice and the exhaust passage when the valve member is in the open position.

11. A compressor, comprising: a first scroll having a first end plate and a first spiral wrap, the first spiral wrap extending from the first end plate; a second scroll having a second end plate and a second spiral wrap, the second spiral wrap extending from the second end plate and meshing with the first spiral wrap to define a fluid pocket therebetween, wherein the second end plate includes a discharge passage; and a valve assembly including a valve housing fixed relative to the second scroll, a valve retainer fixed relative to the valve housing, and a valve member movably received in the valve housing, in: The valve housing includes a plurality of inclined apertures that are inclined relative to a direction in which the valve member moves between an open position and a closed position, The valve member is movable relative to the valve housing and the valve holder between an open position and a closed position, When the valve member is in the open position, fluid is permitted to flow through the exhaust passage and through the inclined aperture in the valve housing, and When the valve member is in the closed position, fluid flows through the exhaust passage and the angled orifice is restricted.

12. The compressor according to claim 11, wherein: The angled aperture in the valve housing extends between an inner diameter surface of the valve housing and an outer diameter surface of the valve housing.

13. The compressor according to claim 12, wherein: When the valve member is in the open position, an opening of the inclined aperture at the inner diameter surface of the valve housing is disposed between the valve member and the exhaust passage.

14. The compressor according to claim 13, wherein: A radially outer surface of the valve member covers the opening of the angled aperture when the valve member is in the closed position.

15. The compressor according to claim 14, wherein: The radially outer surface of the valve member slidably contacts the inner diameter surface of the valve housing when the valve member moves between the open position and the closed position.

16. The compressor according to claim 13, wherein: The valve housing includes a gas return orifice, and wherein the gas return orifice and the angled orifice are in fluid communication with a discharge pressure region of the compressor.

17. The compressor according to claim 16, wherein: The valve housing includes a projection extending into an interior volume of the valve housing and including an axial end surface defining a stop for the valve member in the open position.

18. The compressor according to claim 17, wherein: The gas return orifice extends through the axial end surface of the projection.

19. The compressor according to claim 11, wherein: The valve retainer defines a valve seat that contacts the valve member when the valve member is in the closed position, and wherein the valve seat defines an opening in fluid communication with the exhaust passage.

20. The compressor of claim 11, wherein: The valve housing comprises a base portion and a body portion, The base portion has a larger diameter than the body portion and fixedly engages an inner diameter surface of the hub of the second scroll, The inclined aperture is provided in the body portion, and The body portion and the inner diameter surface of the hub cooperate to define an annular gas flow path in fluid communication with the angled orifice and the exhaust passage when the valve member is in the open position.

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