Valve for filter dryer and dual flow filter dryer comprising such valve

Abstract

In an exemplary embodiment, a two-way valve for a dual flow filter dryer includes a valve body and a movable valve member disposed within the valve body. The movable valve member is movable within the valve body between a first position and a second position. In the first position, the movable valve member allows fluid flow through the valve in a first or forward flow direction while blocking or inhibiting fluid flow through the valve in a second or reverse flow direction. In the second position, the movable valve member allows fluid flow through the valve in the second or reverse flow direction while blocking or inhibiting fluid flow through the valve in the first or forward flow direction. The fluid flow direction through the other filter dryer components may be substantially the same whether the movable valve member is in the first position or the second position.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is a PCT international application, which claims priority to and the benefit of U.S. Patent Application No. 17 / 952,660, filed on September 26, 2023. The entire disclosure of this patent application is incorporated herein by reference. Technical Field

[0003] The present disclosure generally relates to a valve for a filter-drier and a dual-flow filter-drier including the valve. Background Art

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

[0005] A dual-flow filter-drier may be used in a reversible refrigeration system with bidirectional flow to remove or absorb moisture and acid and to filter debris, impurities and / or other contaminants from the refrigeration system. The dual-flow filter-drier may be operable to filter contaminants from the refrigerant as the refrigerant flows through the dual-flow filter-drier in a first or forward direction without reintroducing the filtered contaminants into the refrigeration system as the refrigerant flows through the dual-flow filter-drier in a second or reverse direction. Conversely, the dual-flow filter-drier may also be operable to filter contaminants from the refrigerant as the refrigerant flows through the dual-flow filter-drier in a second or reverse direction without reintroducing the filtered contaminants into the refrigeration system as the refrigerant flows through the dual-flow filter-drier in a first or forward direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] 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.

[0007] Figure 1 is a cross-sectional view of a dual flow or bidirectional filter-dryer 100 including a bidirectional valve 104 according to an exemplary embodiment of the present disclosure;

[0008] Figure 2 yes Figure 1 A cross-sectional view of a dual flow filter-dryer shown, wherein the arrows indicate a first or forward flow direction through a valve of the dual flow filter-dryer;

[0009] Figure 3 yes Figure 1 a cross-sectional view of a dual flow filter-dryer shown, wherein the arrow indicates a second or reverse flow direction through a valve of the dual flow filter-dryer;

[0010] Figure 4 is a cross-sectional view of a dual flow or bidirectional filter-dryer 400 including a bidirectional valve 404 according to an exemplary embodiment of the present disclosure;

[0011] Figure 5 is a cross-sectional view of a dual-flow or bidirectional filter-drier 500 according to an exemplary embodiment of the present disclosure, the dual-flow or bidirectional filter-drier 500 including a bidirectional valve equipped with a flow rater defining a metering orifice;

[0012] Figure 6 is a cross-sectional view of a dual-flow or bidirectional filter-drier 500 according to an exemplary embodiment of the present disclosure, the dual-flow or bidirectional filter-drier 500 including a bidirectional valve equipped with a flow meter defining a metering orifice;

[0013] Figure 7 is an exploded perspective view of an exemplary configuration of a dual-flow filter-dryer according to an exemplary embodiment of the present disclosure;

[0014] Corresponding reference numerals may indicate corresponding (but not necessarily identical) features throughout the several views of the drawings. DETAILED DESCRIPTION

[0015] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0016] Exemplary embodiments disclose a dual-flow or bidirectional filter-drier including a central bidirectional valve configuration (e.g., a central tube-spool valve configuration, etc.). In exemplary embodiments, the bidirectional valve is configured to be disposed within the dual-flow filter-drier such that the bidirectional valve can be centered relative to the dual-flow filter-drier (e.g., disposed along a centerline of the dual-flow filter-drier, etc.). For example, the bidirectional valve and the dual-flow filter-drier can be configured such that a longitudinal centerline of the bidirectional valve is substantially aligned with a longitudinal centerline of the dual-flow filter-drier.

[0017] As background, conventional systems may include two one-way valves and two filter-driers to provide the necessary functions. However, as recognized herein, the dual-flow filter-dryer disclosed herein (e.g., dual-flow filter 100 ( Figure 1 )、Dual flow filter 400( Figure 4 )、Dual flow filter 500( Figure 5 )、Dual flow filter 600( Figure 6 )、Dual flow filter 700( Figure 7 ) etc.) can advantageously provide the same or similar functions while reducing the overall size, number of components and joints. Compared with conventional filter-driers, the exemplary embodiments disclosed herein can advantageously provide one or more (but not necessarily any or all) of the following advantages:

[0018] Fewer parts;

[0019] Fewer manufacturing operations;

[0020] Less complex construction (e.g., fewer parts to assemble, etc.);

[0021] Valves including center tube or cylindrical valve bodies that have increased pressure capabilities for the same or comparable shell or end cover thickness;

[0022] Better volume utilization (e.g., smaller overall filter-dryer size or more filter and desiccant for a standard filter-dryer size, etc.); and / or

[0023] Easy to add / field changeable flow meter with metering hole (e.g., press fit flow meter 556 with metering hole 560 ( Figure 5 ), a threaded flow meter 656 having a metering hole 660 ( Figure 6 )wait). Figure 6 Also shown is a hexagonal or other “socket” 662 on the other side for holding the movable valve member 608 (eg, a spool, etc.) from rotating when the flow meter 656 is screwed into the threaded end 660 of the movable valve member 608 .

[0024] Figure 1 , 2 3 show an exemplary embodiment of a dual-flow filter-dryer 100 embodying one or more aspects of the present disclosure. Figure 1 As shown, the dual-flow filter-drier 100 includes a bidirectional valve 102 along a centerline (e.g., longitudinal centerline axis, etc.) of the dual-flow filter-drier 100. For example, the dual-flow filter-drier 100 can be used in a liquid line in a reversible refrigeration system, such as a heat pump unit with bidirectional flow that reverses between air conditioning and heat pump modes.

[0025] The valve 102 includes a valve body 106 and a movable valve member 108 (eg, a shuttle, etc.) disposed within the valve body 106. For example, the valve body 108 may include a tubular cylindrical valve body (eg, a center tube, etc.) and the movable valve member 108 may include a slidable cylindrical spool valve member or shuttle.

[0026] The valve body 106 includes a first end 110 and a second end 112 opposite the first end. The first end 110 and the second end 112 define a first inlet / outlet and a second inlet / outlet, respectively. The first end 110 and the second end 112 can be configured to connect the valve 104 to a liquid line, such as in a reversible refrigeration system or the like. The valve body 106 also includes a first intermediate or mid-stage portion 114 located between the first end 110 and the second end 112.

[0027] The valve body 106 also includes a first valve opening or port 116 and a second valve opening or port 118 located between the first end portion 100 and the first intermediate portion 114. The second port 118 is spaced apart (e.g., longitudinally spaced apart, etc.) from the first port 116 such that the second port 118 is closer to the first intermediate portion 114 than the first port 116, and such that the first port 116 is closer to the first end portion 110 than the second port 118.

[0028] The valve body 106 also includes a third valve opening or port 120 and a fourth valve opening or port 122 located between the first intermediate portion 114 and the second end portion 112. The third port 120 is spaced apart (e.g., longitudinally spaced apart, etc.) from the fourth port 122 such that the third port 120 is closer to the first intermediate portion 114 than the fourth port 122, and such that the fourth port 122 is closer to the second end portion 114 than the third port 120.

[0029] The movable valve member 108 includes a third end 124 and a fourth end 126 opposite the third end 124. The third end 124 and the fourth end 126 are in fluid communication with the first inlet / outlet and the second inlet / outlet of the valve body 106, respectively. The movable valve member 108 also includes a second intermediate or mid-stage portion 128 located between the third end 124 and the fourth end 126 of the movable valve member 108.

[0030] The movable valve member 108 also includes a fifth valve opening or port 130 located between the third end portion 124 and the second intermediate portion 128. Figure 3 In the second or reverse fluid flow position shown, the fifth port 130 is aligned with the second port 118 of the valve body 106 .

[0031] The movable valve member 106 also includes a sixth valve opening or port 132 located between the third end portion 124 and the second intermediate portion 128. Figure 1 and Figure 2 In the illustrated first or forward fluid flow position, the sixth port 132 is aligned with the third port 120 of the valve body 106 .

[0032] In the illustrated embodiment, the first port 116 includes a plurality of first valve openings or ports spaced apart from one another (e.g., circumferentially spaced apart, etc.) along the valve body 106. The second port 118 includes a plurality of second valve openings or ports spaced apart from one another (e.g., circumferentially spaced apart, etc.) along the valve body 106. The third port 120 includes a plurality of third valve openings or ports spaced apart from one another (e.g., circumferentially spaced apart, etc.) along the valve body 106. The fourth port 122 includes a plurality of fourth valve openings or ports spaced apart from one another (e.g., circumferentially spaced apart, etc.) along the valve body 106. The fifth port 130 includes a plurality of fifth valve openings or ports spaced apart from one another (e.g., circumferentially spaced apart, etc.) along the movable valve member 108. The sixth port 132 includes a plurality of sixth valve openings or ports spaced apart from one another (e.g., circumferentially spaced apart, etc.) along the movable valve member 108.

[0033] Ports 116, 118, 20, 24 may be integrally defined by valve body 104, e.g., machined or drilled into valve body 104, which is provided by an injection molding process, etc. Ports 130, 132 may be integrally defined by moveable valve member 108, e.g., machined or drilled into moveable valve member, which is provided by an injection molding process, etc.

[0034] The movable valve member 108 is in a first position relative to the valve body 104 ( Figure 1 and Figure 2 ) and the second position ( Figure 3 ). In the first position, the movable valve member 108 blocks and inhibits fluid flow through the second port 118 and the fourth port 122. Also in the first position, the sixth port 132 of the movable valve member 108 is aligned with the third port 120 of the valve body 106. Therefore, the flow of fluid (e.g., refrigerant, etc.) is allowed along the first or forward fluid flow path ( Figure 2 ), the path being defined as beginning at a first inlet / outlet at the first end 110 , exiting the valve 100 via the first port 116 , entering the valve 110 via the aligned third port 120 and sixth port 132 , and exiting from a second inlet / outlet at the second end 112 .

[0035] In the second position, the movable valve member 108 blocks and inhibits fluid flow through the third port 122 and the first port 116. Also in the second position, the fifth port 130 of the movable valve member 108 is aligned with the second port 118 of the valve body 106. Thus, fluid (e.g., refrigerant, etc.) is allowed to flow along the second or reverse fluid flow path ( Figure 3 ), the path being defined as beginning at the second inlet / outlet of the second end 112, exiting the valve 110 via the fourth port 122, entering the valve 100 via the aligned fifth port 130 and the second port 118, and exiting from the first inlet / outlet of the first end 110.

[0036] Regardless of the position of the movable valve member 108, the first or forward flow path ( Figure 2 ) or is the movable valve member 108 positioned to define a second or reverse flow path through the valve 100 ( Figure 3 ) in a second position, the direction of fluid flow through the other filter-dryer components (e.g., filter 150, screen 148, desiccant 146, screen 144) is substantially the same.

[0037] The dual flow filter-dryer 100 includes an outer shell or housing 134 including one or more walls defining an interior compartment. Figure 1 As shown, housing 134 is a multi-piece housing including an intermediate housing portion 136 (e.g., a can, etc.) and first and second end caps 138 and 140 coupled to opposite first and second ends of intermediate housing portion 138. Alternatively, dual-flow filter-dryer 100 may have a housing with a different configuration, such as a single-piece housing or housing ( Figure 4 )wait.

[0038] Return to reference Figure 1 , the first end 110 and the second end 112 of the valve body 106 protrude outwardly beyond the housing 134. Therefore, the first end 110 and the second end 112 are exposed and accessible, for example, for connecting the valve to a liquid line in a reversible refrigeration system, etc.

[0039] A first porous element 144 (e.g., an inner screen or mesh, etc.) is located within the interior compartment of the housing 134. The first porous element 144 is arranged along the outer surface of the valve body 106 so that the first porous element 144 is arranged above the second port 118 and the third port 120 of the valve body 106. Depending on the specific end-use application, the first porous element 144 can include galvanized steel, aluminum, stainless steel, or other suitable materials. Depending on the specific end-use application, the first porous element 144 can include 0.062 inch pores, 0.075 inch pores, or other suitable pore sizes.

[0040] The desiccant 146 is located within the interior compartment of the housing 134. The desiccant 146 is disposed above the first porous element 144. The desiccant 146 may include a molecular sieve and a binder.

[0041] A second porous element 148 (e.g., an outer screen or mesh, etc.) is located within the interior compartment of the housing 134. The second porous element 148 is disposed above the desiccant 146. The second porous element 148 may include galvanized steel, aluminum, stainless steel, or other suitable materials, depending on the particular end-use application. The second porous element 148 may include 0.062 inch pores, 0.075 inch pores, or other suitable pore sizes, depending on the particular end-use application.

[0042] The filter 150 is located within the interior compartment of the housing 134. The filter 150 is disposed above the second porous element 148. The filter 150 is generally located between the housing 134 and the second porous element 148. The filter 150 may include a lint filter or the like.

[0043] The first porous element 144 and the second porous element 148 can be configured to help maintain the positioning of the dual-flow filter-dryer components (e.g., filter 150, desiccant 146, beaded desiccant material, etc.). The first porous element 144 and the second porous element 148 can be configured to capture relatively large foreign matter debris (FOD), impurities and / or other contaminants. The first porous element 144 and the second porous element 148 can be made of the same material and have the same configuration (e.g., the same pore size, etc.), although this is not required in all embodiments. In alternative embodiments, for example, when a shaped dryer is used instead of a beaded desiccant material, etc., the first porous element 144 and / or the second porous element 148 can be eliminated or not required.

[0044] When the movable valve member 108 is in the first position, the first or forward fluid flow path ( Figure 1 and Figure 2 ) is defined as a first inlet / outlet beginning at the first end 110 of the valve body, flowing out through the first port 116 of the valve body 106, passing through the filter 150, the second porous element 148, the desiccant 146 and the first porous element 144, entering the valve body 106 via the aligned third port 120 and the sixth port 132, and flowing out from the second inlet / outlet of the second end 112 of the valve body.

[0045] When the movable valve member 108 is in the second position, the second or reverse fluid flow path ( Figure 3 ) is defined as a second inlet / outlet beginning at the second end 112 of the valve body, flowing out through the fourth port 122 of the valve body 106, passing through the filter 150, the second porous element 148, the desiccant 146 and the first porous element 144, entering the valve body 106 via the aligned second port 118 and the fifth port 130, and flowing out from the first inlet / outlet of the first end 110 of the valve body.

[0046] In the first position ( Figure 1 and Figure 2 ), the movable valve member 108 blocks and inhibits the refrigerant (broadly speaking, the fluid) in a second or reverse flow direction, and the second or reverse flow direction generally starts from the second inlet / outlet of the second end 112 of the valve body toward the first inlet / outlet of the first end 110 of the valve body.

[0047] In the second position ( Figure 3), the movable valve member 108 blocks and inhibits the refrigerant (broadly speaking, the fluid) in a first or positive flow direction, and the first or positive flow direction generally starts from a first inlet / outlet at a first end 110 of the valve body toward a second inlet / outlet at a second end 112 of the valve body.

[0048] Figure 2 The arrow in represents the first or forward flow direction through the valve 104 of the dual flow filter-drier 100. The forward flow of the pressurized fluid pushes the movable valve member 108 to the right, thereby opening / aligning the corresponding valve port to define a forward flow path through the valve 104 of the dual flow filter-drier 100.

[0049] Figure 3 The arrow in represents the second or reverse flow direction through the valve 104 of the dual flow filter-dryer 100. The reverse flow of the pressurized fluid pushes the movable valve member 108 to the left, thereby opening / aligning the corresponding valve port to define a reverse flow path through the valve 104 of the dual flow filter-dryer 100. Figure 2 and Figure 3 As shown by the arrows in , whether the movable valve member 108 is in a first position defining a first or forward flow path through the valve 104, or in a second position defining a second or reverse flow path through the valve 104, the direction of fluid flow through the filter 150, the second porous element 148, the desiccant 146 and the first porous element 144 is substantially the same.

[0050] Continue to refer Figure 1 , the valve body 106 and the movable valve member 108 are configured to define first and second stops. The first stop is operable to inhibit the movable valve member 108 from sliding beyond the first position in the valve body 106 in a direction toward the second end 112, thereby aligning the sixth port 132 of the movable valve member 108 with the third port 120 of the valve body 106 ( Figure 1 and Figure 2 The second stopper is operable to inhibit the movable valve member 108 from sliding within the valve body 106 in a direction toward the first end 110 beyond the second position, thereby aligning the fifth port 130 of the movable valve member 108 with the second port 118 of the valve body 106 ( Figure 3 ).

[0051] In the exemplary embodiment, the second intermediate portion 128 of the movable valve member 108 includes a recessed portion 152 defined between the opposing first and second wall portions. The first intermediate portion 114 of the valve body 106 includes a curled portion 154 (broadly, an inward protrusion or projection) that protrudes inwardly into the recessed portion 152 of the movable valve member 108. The contact ( Figure 1 and Figure 3) can operate as a first stop that inhibits the movable valve member 108 from sliding beyond the first position within the valve body 106. The contact of the curled portion 154 of the valve body 106 with the second wall portion of the movable valve member 108 ( Figure 3 ) can operate as a second stop that inhibits the movable valve member 108 from sliding within the valve body 106 beyond the second position.

[0052] Figure 4 An exemplary embodiment of a dual-flow filter-drier 400 is shown that includes a two-way valve 404 and a one-piece housing or shell 434. The one-piece housing or shell 434 may include a rolled one-piece copper shell, etc. Other features of the dual-flow filter-drier 400 (e.g., valve body, movable valve member, filter, first and second porous elements, desiccant, etc.) may be substantially the same or similar to corresponding features of the dual-flow filter-drier 100. For the sake of brevity, these same or similar features shared by the dual-flow filter-drier 400 and the dual-flow filter-drier 100 will not be rewritten separately for the dual-flow filter-drier 400.

[0053] Figure 5 An exemplary embodiment of a dual flow filter-drier 500 is shown that includes a bi-directional valve 504 equipped with a flow meter 556 defining a metering orifice 558. The flow meter 556 is configured to removably engage with an end 560 of a movable valve member 508. In the exemplary embodiment, the flow meter 556 is configured to removably engage with the end 560 of the movable valve member 508 by press-fitting the flow meter 556 into the end 560 of the movable valve member 508.

[0054] Flow meter 556 restricts flow in only one direction, the heat pumping direction, which in this example would be the first or forward flow direction through valve 504 (see, e.g., Figure 2 556, etc.). Thus, the dual flow filter-dryer 500 equipped with the flow meter 556 can provide an expansion device in the outdoor unit for operation as a heat pump. With the flow meter 556 in place, there is still full flow in the opposite direction, such as for air conditioning, which in this example would be the second or reverse flow direction through the valve 504 (see, for example, Figure 3 arrows in the figure, etc.).

[0055] When flowing in the heat pump direction, the metering orifice 558 of the flow meter 556 can be used as an expansion orifice. The orifice 558 is sized for the required pressure drop at the nominal tonnage. In the cooling mode, the dual flow filter-drier 500 is in a free flow state because the flow meter 556 of the dual flow filter-drier 500 is not in the flow path. Also in the cooling mode, the expansion device elsewhere in the system will be a thermostatic expansion valve (TXV) or a fixed orifice located on the indoor coil.

[0056] Flow meter 556 integrates historically separate components because generally the filter-drier should have minimal impact on flow. For example, when the external coil is an evaporator coil, flow meter 556 can be configured to act as a fixed orifice for the external coil in heat pump mode. In air conditioning mode, valve 504 will allow full flow in the opposite direction.

[0057] The ability to field install the flowmeter 556 with the metered orifice 558 enables field configuration of the valve 504, for example, for use with a large filter drier on a smaller system, etc. For example, the metered orifice 558 of the flowmeter 556 can be configured for a 3 ton system, so that the valve 504 equipped with the flowmeter 556 can then enable the use of a 5 ton capable unit on a 3 ton system. This may occur because a technician wishes to increase capacity or reduce the number of different parts loaded on a truck.

[0058] Other features of the dual-flow filter-drier 500 (e.g., valve body, movable valve member, filter, first and second porous elements, desiccant, etc.) may be substantially the same or similar to corresponding features of the dual-flow filter-drier 100. For the sake of brevity, these same or similar features shared by the dual-flow filter-drier 500 and the dual-flow filter-drier 100 will not be rewritten separately for the dual-flow filter-drier 500.

[0059] Figure 6 An exemplary embodiment of a dual-flow filter-drier 600 is shown that includes a bidirectional valve 604 equipped with a flow meter 656 defining a metering orifice 658. In the exemplary embodiment, the flow meter 656 is configured to be removably engaged with an end 660 of the movable valve member 608 by threading the flow meter 656 into the end 660 of the movable valve member 608. The flow meter 656 includes a threaded portion (e.g., an external threaded portion, etc.) that is configured to be threadedly engaged with a threaded portion (e.g., an internal threaded portion, etc.) of the movable valve member 608. Figure 6 Also shown is a hexagonal or other “socket” 662 on the other side for holding the movable valve member 608 (eg, a spool, etc.) from rotating when the flow meter 656 is screwed into the threaded end 660 of the movable valve member 608 .

[0060] Flow controller 656 restricts flow in only one direction, the heat pumping direction, which in this example would be the first or forward flow direction through valve 604 (see, e.g., Figure 2 656). Thus, the dual flow filter-dryer 600 equipped with the flow meter 656 can provide an expansion device in the outdoor unit for operation as a heat pump. With the flow meter 656 in place, there is still full flow in the opposite direction, such as for air conditioning, which in this example would be the second or reverse flow direction through valve 604 (see, for example, Figure 3arrows in the figure, etc.).

[0061] When flowing in the heat pump direction, the metering orifice 658 of the flow meter 656 can be used as an expansion orifice. The orifice 658 is sized for the required pressure drop at the nominal tonnage. In the cooling mode, the dual flow filter-drier 600 is in a free flow state because the flow meter 656 of the dual flow filter-drier 600 is not in the flow path. Also in the cooling mode, the expansion device elsewhere in the system will be a thermostatic expansion valve (TXV) or a fixed orifice located on the indoor coil.

[0062] Flow meter 656 integrates what was historically a separate component because generally the filter-drier should have minimal impact on flow. For example, when the external coil is an evaporator coil, flow meter 656 can be configured to act as a fixed orifice for the external coil in heat pump mode. In air conditioning mode, valve 604 will allow full flow in the opposite direction.

[0063] As with the flowmeter 556 previously used, the ability to field install the flowmeter 656 with the metered orifice 658 enables field configuration of the valve 604, e.g., for use with a large filter-drier on a smaller system, etc. For example, the metered orifice 658 of the flowmeter 656 may be configured for a 3 ton system, such that the valve 604 equipped with the flowmeter 656 may then enable use of a 5 ton capable unit on a 3 ton system.

[0064] Other features of the dual-flow filter-drier 600 (e.g., valve body, movable valve member, filter, first and second porous elements, desiccant, etc.) may be substantially the same or similar to corresponding features of the dual-flow filter-drier 100. For the sake of brevity, these same or similar features shared by the dual-flow filter-drier 600 and the dual-flow filter-drier 100 will not be rewritten separately for the dual-flow filter-drier 600.

[0065] Figure 7 is an exploded perspective view of an exemplary configuration of a dual-flow filter-dryer 700 according to an exemplary embodiment of the present disclosure. Figure 7 As shown, an optional retainer (e.g., a spring clip, etc.) can be placed on the center tube at the end of the inner screen to help maintain the inner screen in position along the center tube. Other features of the dual flow filter-dryer 700 can be substantially the same or similar to corresponding features of the dual flow filter-dryer 100. For the sake of brevity, these same or similar features shared by the dual flow filter-dryer 700 and the dual flow filter-dryer 100 will not be rewritten separately for the dual flow filter-dryer 700.

[0066] In an exemplary embodiment, a valve for a dual flow filter-drier includes a valve body and a movable valve member disposed within the valve body. The valve body includes a first end and a second end opposite the first end. The first and second ends define a first inlet / outlet and a second inlet / outlet, respectively. The first and second ends can be configured to connect the valve to a liquid line, such as in a reversible refrigeration system or the like. The valve body also includes a first intermediate or mid-stage portion located between the first and second ends.

[0067] The valve body also includes first and second valve openings or ports located between the first end and the first intermediate portion. The second port is spaced apart (e.g., longitudinally spaced apart, etc.) from the first port such that the second port is closer to the first intermediate portion than the first port, and the first port is closer to the first end than the second port.

[0068] The valve body also includes third and fourth valve openings or ports located between the first intermediate portion and the second end portion. The third port is spaced apart (e.g., longitudinally spaced apart, etc.) from the fourth port such that the third port is closer to the first intermediate portion than the fourth port, and the fourth port is closer to the second end portion than the third port.

[0069] The movable valve member includes a third end and a fourth end opposite the third end. The third and fourth ends are in fluid communication with the first inlet / outlet and the second inlet / outlet of the valve body, respectively. The movable valve member also includes a second intermediate or mid-stage portion located between the third and fourth ends of the movable valve member.

[0070] The movable valve member also includes a fifth valve opening or port located between the third end portion and the second intermediate portion. The fifth port is alignable with the second port of the valve body.

[0071] The movable valve member also includes a sixth valve opening or port located between the third end portion and the second intermediate portion. The sixth port is alignable with the third port of the valve body.

[0072] The movable valve member is movable relative to the valve body between a first position and a second position. In the first position, the movable valve member blocks and inhibits fluid flow through the second port and the fourth port. Also in the first position, the sixth port of the movable valve member is aligned with the third port of the valve body. Thus, fluid flow is allowed along a first or forward fluid flow path defined as starting from the first inlet / outlet, exiting the valve via the first port, entering the valve via the aligned third and sixth ports, and exiting from the second inlet / outlet.

[0073] In the second position, the movable valve member blocks and inhibits fluid flow through the third and first ports. Also in the second position, the fifth port of the movable valve member is aligned with the second port of the valve body. Thus, fluid flow is permitted along a second or reverse fluid flow path defined as beginning at the second inlet / outlet, exiting the valve via the fourth port, entering the valve via the aligned fifth and second ports, and exiting the first inlet / outlet.

[0074] The direction of fluid flow through other filter-dryer components (e.g., filters, screens, desiccant, etc.) may be substantially the same regardless of whether the movable valve member is in a first position defining a first or forward flow path through the valve, or whether the movable valve member is in a second position defining a second or reverse flow path through the valve.

[0075] In an exemplary embodiment, the valve further comprises a flowmeter, which comprises a metering hole. The flowmeter is configured to be detachably engaged with the fourth end of the movable valve member. For example, the flowmeter can be configured to be detachably engaged with the fourth end of the movable valve member by the flowmeter press-fitting into the fourth end of the movable valve member. Alternatively, for example, the flowmeter can include a threaded portion (e.g., an external threaded portion, etc.) that is configured to be threadedly engaged with a threaded portion (e.g., an internal threaded portion, etc.) of the movable valve member.

[0076] In an exemplary embodiment, the flow meter is configured to restrict fluid flow in a first or forward flow direction while allowing full fluid flow in a second or reverse flow direction. When the external coil is an evaporator coil, the flow meter can be configured to act as a fixed orifice for the external coil in heat pump mode and allow full flow in the opposite direction in air conditioning mode.

[0077] In an exemplary embodiment, the valve includes a shuttle valve, which includes a first and a second internal chamber cooperatively defined by a valve body and a movable valve member. The first internal chamber is in fluid communication with a first inlet / outlet defined by a first end of the valve body. The second internal chamber is in fluid communication with a second inlet / outlet defined by a second end of the valve body. The shuttle valve is configured so that a pressurized fluid entering the first internal chamber via the first inlet / outlet is operable to push the movable valve member to slide away from the first inlet / outlet toward the opposite end of the first internal chamber and toward the first position. The shuttle valve is also configured so that a pressurized fluid entering the second internal chamber via the second inlet / outlet is operable to push the movable valve member to slide away from the second inlet or outlet toward the opposite end of the second internal chamber and toward the second position.

[0078] In an exemplary embodiment, the valve body and the movable valve member are configured to define first and second stops. The first stop is operable to inhibit the movable valve member from sliding beyond a first position in the valve body in a direction toward the second end, thereby aligning the sixth port of the movable valve member with the third port of the valve body. The second stop is operable to inhibit the movable valve member from sliding beyond a second position in the valve body in a direction toward the first end, thereby aligning the fifth port of the movable valve member with the second port of the valve body.

[0079] In an exemplary embodiment, the second intermediate portion of the movable valve member includes a recessed portion defined between the opposing first and second wall portions. The first intermediate portion of the valve body includes a curled portion that protrudes inwardly into the recessed portion of the movable valve member. The contact of the curled portion of the valve body with the first wall portion of the movable valve member can operate as a first stop that inhibits the movable valve member from sliding beyond the first position within the valve body. The contact of the curled portion of the valve body with the second wall portion of the movable valve member can operate as a second stop that inhibits the movable valve member from sliding beyond the second position within the valve body.

[0080] In an exemplary embodiment, the movable valve member is slidably arranged in the valve body so that: the flow of fluid entering the first inlet / outlet applies pressure to the movable valve member so that the movable valve member is slidably moved away from the first inlet / outlet toward the first position; and the flow of fluid entering the second inlet / outlet applies pressure to the movable valve member so that the movable valve member is slidably moved away from the second inlet / outlet toward the second position.

[0081] In an exemplary embodiment, the first port includes a plurality of first valve openings or ports spaced apart from each other (e.g., circumferentially spaced apart, etc.) along the valve body. The second port includes a plurality of second valve openings or ports spaced apart from each other (e.g., circumferentially spaced apart, etc.) along the valve body. The third port includes a plurality of third valve openings or ports spaced apart from each other (e.g., circumferentially spaced apart, etc.) along the valve body. The fourth port includes a plurality of fourth valve openings or ports spaced apart from each other (e.g., circumferentially spaced apart, etc.) along the valve body. The fifth port includes a plurality of fifth valve openings or ports spaced apart from each other (e.g., circumferentially spaced apart, etc.) along the movable valve member. The sixth port includes a plurality of sixth valve openings or ports spaced apart from each other (e.g., circumferentially spaced apart, etc.) along the movable valve member.

[0082] In an exemplary embodiment, the valve body comprises a tubular cylindrical valve body including a wall defining first, second, third and fourth ports. The movable valve member comprises a cylindrical spool valve member.

[0083] In an exemplary embodiment, a dual-flow filter-dryer includes a valve disclosed herein. The valve may be arranged along a centerline of the dual-flow filter-dryer. The valve may include a longitudinal centerline that is substantially aligned with a longitudinal centerline of the dual-flow filter-dryer.

[0084] In an exemplary embodiment, a dual flow filter-drier includes a housing including one or more walls defining an interior compartment. One or more filter media are located within the interior compartment. A desiccant is located within the interior compartment. The one or more walls of the housing may include a single wall defining the interior compartment, whereby the housing has a one-piece unitary construction. The first and second ends of the valve body may protrude outwardly beyond the housing, whereby the first and second ends are exposed and accessible to connect the valve to a liquid line in a reversible refrigeration system.

[0085] In an exemplary embodiment, the dual-flow filter-drier includes a housing including one or more walls defining an internal compartment. A first porous element (e.g., an inner screen or mesh, etc.) is located in the internal compartment of the housing and arranged along the outer surface of the valve body so that the first porous element is arranged above the second and third ports of the valve body. A desiccant is located in the internal compartment of the housing and arranged above the first porous element. A second porous element (e.g., an outer screen or mesh, etc.) is located in the internal compartment of the housing and arranged above the desiccant. A filter is located in the internal compartment of the housing and arranged above the second porous element. When the movable valve member is in the first position, a first or forward fluid flow path is defined as starting from the first inlet / outlet of the valve body, flowing out through the first port of the valve body, passing through the filter, the second porous element, the desiccant and the first porous element, entering the valve body via the aligned third and sixth ports and flowing out from the second inlet / outlet. When the movable valve member is in the second position, a second or reverse fluid flow path is defined as: originating from the second inlet / outlet of the valve body, flowing out through the fourth port of the valve body, through the filter, the second porous element, the desiccant and the first porous element, entering the valve body via the aligned second and fifth ports and flowing out of the first inlet / outlet. Whether the movable valve member is in the first position defining a first or forward flow path through the valve, or in the second position defining a second or reverse flow path through the valve, the direction of fluid flow through the filter, the second porous element, the desiccant and the first porous element can be substantially the same.

[0086] In an exemplary embodiment, a bidirectional valve for a dual flow filter-drier includes a valve body and a movable valve member slidably disposed within the valve body. The valve body is configured to be disposed within the dual flow filter-drier such that the valve body is centered relative to the dual flow filter-drier.

[0087] The valve body includes a first end and a second end opposite to the first end. The first and second ends define a first inlet / outlet and a second inlet / outlet, respectively.

[0088] The movable valve member is configured such that the movable valve member is movable within the valve body between a first position and a second position.

[0089] When the movable valve member is in the first position, refrigerant (or fluid in a broad sense) flow is permitted in a first or forward flow direction from the first inlet / outlet through the valve of the dual-flow filter-drier to the second inlet / outlet. Also in the first position, the movable valve member blocks and inhibits refrigerant flow in a second or reverse flow direction from the second inlet / outlet through the valve of the dual-flow filter-drier to the first inlet / outlet.

[0090] When the movable valve member is in the second position, refrigerant flow is permitted in a second or reverse flow direction from the second inlet / outlet through the valve of the dual flow filter-drier to the first inlet / outlet. Also in the second position, the movable valve member blocks and inhibits refrigerant flow in a first or forward flow direction from the first inlet / outlet through the valve of the dual flow filter-drier to the second inlet / outlet.

[0091] The direction of fluid flow through other filter-dryer components (e.g., filters, screens, desiccant, etc.) may be substantially the same regardless of whether the movable valve member is in a first position defining a first or forward flow path through the valve, or whether the movable valve member is in a second position defining a second or reverse flow path through the valve.

[0092] In an exemplary embodiment, the valve further comprises a flowmeter, which comprises a metering hole. The flowmeter is configured to be detachably engaged with the end of the movable valve member. For example, the flowmeter can be configured to be detachably engaged with the end of the movable valve member by the flowmeter press-fitting the end of the movable valve member. Or, for example, the flowmeter can include a threaded portion (e.g., an external threaded portion, etc.) that is configured to be threadedly engaged with a threaded portion (e.g., an internal threaded portion, etc.) of the movable valve member.

[0093] In an exemplary embodiment, the flow meter is configured to restrict fluid flow in a first or forward flow direction while allowing full fluid flow in a second or reverse flow direction. When the external coil is an evaporator coil, the flow meter can be configured to act as a fixed orifice for the external coil in heat pump mode and allow full flow in the opposite direction in air conditioning mode.

[0094] In an exemplary embodiment, the valve includes a shuttle valve, which includes a first and a second internal chamber cooperatively defined by a valve body and a movable valve member. The first internal chamber is in fluid communication with a first inlet / outlet defined by a first end of the valve body. The second internal chamber is in fluid communication with a second inlet / outlet defined by a second end of the valve body. The shuttle valve is configured so that a pressurized fluid entering the first internal chamber via the first inlet / outlet is operable to push the movable valve member to slide away from the first inlet / outlet toward the opposite end of the first internal chamber and toward the first position. The shuttle valve is also configured so that a pressurized fluid entering the second internal chamber via the second inlet / outlet is operable to push the movable valve member to slide away from the second inlet or outlet toward the opposite end of the second internal chamber and toward the second position.

[0095] In an exemplary embodiment, the valve body and the movable valve member are configured to define first and second stops. The first stop is operable to inhibit the movable valve member from sliding beyond a first position in the valve body in a direction toward the second end, thereby aligning the sixth port of the movable valve member with the third port of the valve body. The second stop is operable to inhibit the movable valve member from sliding beyond a second position in the valve body in a direction toward the first end, thereby aligning the fifth port of the movable valve member with the second port of the valve body.

[0096] In an exemplary embodiment, the movable valve member includes a recessed portion defined between opposing first and second wall portions. The valve body includes a curled portion that protrudes inwardly into the recessed portion of the movable valve member. Contact of the curled portion of the valve body with the first wall portion of the movable valve member can operate as a first stop that inhibits the movable valve member from sliding beyond a first position within the valve body. Contact of the curled portion of the valve body with the second wall portion of the movable valve member can operate as a second stop that inhibits the movable valve member from sliding beyond a second position within the valve body.

[0097] In an exemplary embodiment, the movable valve member is slidably arranged in the valve body so that: the flow of fluid entering the first inlet / outlet applies pressure to the movable valve member so that the movable valve member is slidably moved away from the first inlet / outlet toward the first position; and the flow of fluid entering the second inlet / outlet applies pressure to the movable valve member so that the movable valve member is slidably moved away from the second inlet / outlet toward the second position.

[0098] In an exemplary embodiment, a dual flow filter-drier includes a valve disclosed herein disposed along a centerline of the dual flow filter-drier. The valve may include a longitudinal centerline that is substantially aligned with a longitudinal centerline of the dual flow filter-drier.

[0099] In an exemplary embodiment, a dual flow filter-drier includes a housing including one or more walls defining an internal compartment. One or more filter media are located within the internal compartment. A desiccant is located within the internal compartment. When the movable valve member is in a first position, a first or forward fluid flow path is defined as: starting from a first inlet / outlet of the valve body, flowing out of the valve body, through the one or more filter media and the desiccant, entering the valve body and flowing out of a second inlet / outlet of the valve body. When the movable valve member is in a second position, a second or reverse fluid flow path is defined as: starting from the second inlet / outlet of the valve body, flowing out of the valve body, through the one or more filter media and the desiccant, entering the valve body and flowing out of the first inlet / outlet of the valve body. Whether the movable valve member is in a first position defining a first or forward flow path through the valve, or whether the movable valve member is in a second position defining a second or reverse flow path through the valve, the direction of fluid flow through the one or more filter media and the desiccant can be substantially the same.

[0100] The one or more walls of the housing may include a single wall defining the interior compartment, whereby the housing has a one-piece unitary structure. The first and second ends of the valve body may protrude outwardly beyond the housing, whereby the first and second ends are exposed and accessible for connecting the valve to a liquid line in a reversible refrigeration system.

[0101] In an exemplary embodiment, the dual-flow filter-drier includes a housing including one or more walls defining an internal compartment. A first porous element (e.g., an inner screen or mesh, etc.) is located in the internal compartment of the housing and arranged along the outer surface of the valve body so that the first porous element is arranged above the second and third ports of the valve body. A desiccant is located in the internal compartment of the housing and arranged above the first porous element. A second porous element (e.g., an outer screen or mesh, etc.) is located in the internal compartment of the housing and arranged above the desiccant. A filter is located in the internal compartment of the housing and arranged above the second porous element. When the movable valve member is in the first position, a first or forward fluid flow path is defined as starting from a first inlet / outlet of the valve body, flowing out of the valve body, passing through a filter, a second porous element, a desiccant, and a first porous element, entering the valve body, and flowing out from a second inlet / outlet of the valve body. When the movable valve member is in the second position, a second or reverse fluid flow path is defined as starting from the second inlet / outlet of the valve body, flowing out of the valve body, through the filter, the second porous element, the desiccant and the first porous element, entering the valve body and flowing out of the first inlet / outlet of the valve body. Whether the movable valve member is in the first position defining a first or forward flow path through the valve or in the second position defining a second or reverse flow path through the valve, the direction of fluid flow through the filter, the second porous element, the desiccant and the first porous element can be substantially the same.

[0102] In an exemplary embodiment, the dual-flow filter-drier includes a housing including one or more walls defining an interior compartment. One or more filter media are located within the interior compartment. A desiccant is located within the interior compartment. A two-way valve is disposed within the interior compartment such that the valve is centered relative to the dual-flow filter-drier.

[0103] The valve includes a valve body and a movable valve member. The valve body includes first and second ends defining a first inlet / outlet and a second inlet / outlet, respectively.

[0104] The movable valve member is slidably arranged in the valve body. The movable valve member is configured so that the movable valve member can move between a first position and a second position in the valve body. When the movable valve member is in the first position, the refrigerant flow is allowed to flow along the first inlet / outlet of the valve body, out of the valve body, through one or more filter media and desiccants, into the valve body and out of the second inlet / outlet of the valve body. The first or positive flow direction. When the movable valve member is in the second position, the refrigerant flow is allowed to flow along the second inlet / outlet of the valve body, out of the valve body, through one or more filter media and desiccants, into the valve body and out of the first inlet / outlet of the valve body. The second or reverse flow direction. When the movable valve member is in the first position, the movable valve member blocks and inhibits the flow of the refrigerant in the second or reverse flow direction. When the movable valve member is in the second position, the movable valve member blocks and inhibits the flow of the refrigerant along the first or positive flow direction.

[0105] The direction of fluid flow through other filter-dryer components (e.g., one or more filter media, desiccants, etc.) can be substantially the same regardless of whether the movable valve member is in a first position defining a first or forward flow path through the valve, or whether the movable valve member is in a second position defining a second or reverse flow path through the valve.

[0106] In an exemplary embodiment of the dual flow filter-drier, the valve includes a longitudinal centerline that is substantially aligned with a longitudinal centerline of the dual flow filter-drier.

[0107] In an exemplary embodiment, the valve of the dual flow filter-drier further comprises a flowmeter, the flowmeter comprising a metering hole, the flowmeter being configured to be removably engaged with the end of the movable valve member. For example, the flowmeter may be configured to be removably engaged with the end of the movable valve member by press-fitting the flowmeter into the end of the movable valve member. Alternatively, for example, the flowmeter may include a threaded portion (e.g., an external threaded portion, etc.) configured to be threadedly engaged with a threaded portion (e.g., an internal threaded portion, etc.) of the movable valve member.

[0108] In an exemplary embodiment, the flow meter is configured to restrict fluid flow in a first or forward flow direction while allowing full fluid flow in a second or reverse flow direction. When the external coil is an evaporator coil, the flow meter can be configured to act as a fixed orifice for the external coil in heat pump mode and allow full flow in the opposite direction in air conditioning mode.

[0109] In an exemplary embodiment of a dual-flow filter-dryer, one or more walls of the housing include a single wall defining an interior compartment, whereby the housing has a one-piece unitary structure. The first and second ends of the valve body protrude outwardly beyond the housing, whereby the first and second ends are exposed and accessible for connecting the valve to a liquid line in a reversible refrigeration system.

[0110] In an exemplary embodiment of a dual-flow filter-dryer, one or more filter media include a first and a second porous element and a filter. The first porous element (e.g., an inner screen or mesh, etc.) is located in the interior compartment of the housing and arranged along the outer surface of the valve. The desiccant is arranged above the first porous element. The second porous element (e.g., an outer screen or mesh, etc.) is located in the interior compartment of the housing and arranged above the desiccant. The filter is located in the interior compartment of the housing and arranged above the second porous element. When the movable valve member is in the first position, the first or forward fluid flow path is defined as: starting from the first inlet / outlet of the valve body, flowing out of the valve body, through the filter, the second porous element, the desiccant and the first porous element, entering the valve body and flowing out from the second inlet / outlet of the valve body. When the movable valve member is in the second position, the second or reverse fluid flow path is defined as: starting from the second inlet / outlet of the valve body, flowing out of the valve body, through the filter, the second porous element, the desiccant and the first porous element, entering the valve body and flowing out from the first inlet / outlet of the valve body.

[0111] Exemplary embodiments of the valves and filter-driers disclosed herein may be used in a wide variety of systems, such as refrigerated cases (e.g., supermarket cases, etc.), refrigerated walk-ins, HVAC systems (including large commercial HVAC systems or refrigeration systems), electric bus air conditioning and heat pump systems, commercial heat pump systems, modular air conditioning systems, process chillers, etc. Exemplary embodiments of the valves disclosed herein may also be used in any medium or low temperature refrigeration, such as convenience stores, ice machines, grocery stores, pharmaceutical production or storage, commercial air conditioning, residential air conditioning, humidification and dehumidification systems, cannabis dryers, etc. Therefore, aspects of the present disclosure should not be limited to use with any one particular type of system.

[0112] Example embodiments are provided to make the present disclosure 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. Those skilled in the art will appreciate that specific details need not be adopted, and that the example embodiments may be embodied 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. In addition, the advantages and improvements that may be achieved by providing one or more exemplary embodiments of the present disclosure are provided for illustrative purposes only and do not limit the scope of the present disclosure, as the exemplary embodiments disclosed herein may provide all or none of the above advantages and improvements and still fall within the scope of the present disclosure.

[0113] The specific dimensions, specific materials and / or specific shapes disclosed herein are essentially examples and do not limit the scope of the present disclosure. The specific values ​​and specific value ranges of given parameters disclosed herein do not exclude other values ​​and value ranges that may be useful in one or more examples disclosed herein. In addition, it is contemplated that any two specific values ​​of specific parameters described herein can limit the endpoints of the value range that may be applicable to a given parameter (that is, the disclosure of the first value and the second value of a given parameter can be interpreted as disclosing any value between the first value and the second value and can also be used for a given parameter). For example, if parameter X is exemplified herein as having value A and also exemplified as having value Z, it is contemplated that parameter X can have a value range from about A to about Z. Similarly, it is contemplated that the disclosure of two or more value ranges of a parameter (whether these ranges are nested, overlapping or different) includes all possible range combinations of values ​​that may be claimed using the endpoints of the disclosed range. For example, if parameter X is illustrated herein as having a value in the range of 1-10 or 2-9 or 3-8, it is also contemplated that parameter X may have other ranges of values ​​including 1-9, 1-8, 1-3, 1-2, 2-10, 2-8, 2-3, 3-10, and 3-9.

[0114] The terms used herein are only used to describe specific example embodiments and are not intended to be limiting. For example, when permissive phrases such as "may include," "may include," etc. are used herein, at least one embodiment includes or contains such features. Unless the context clearly indicates otherwise, the singular forms "one" and "the" used herein may also include plural forms. The terms "include," "comprise," and "have" are inclusive and thus specify the presence of the features, integers, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or groups thereof. The method steps, processes, and operations described herein should not be interpreted as having to be performed in the specific order discussed or described, unless specifically specified as an order of execution. It should also be understood that additional or alternative steps may be adopted.

[0115] When an element or layer is referred to as being "on," "engaged to," "connected to," or "bound to" another element or layer, it may be directly on, engaged to, connected to, or bound to the other element or layer, or there may be intervening elements or layers. In contrast, when an element is referred to as being "directly on," "directly engaged to," "directly connected to," or "directly bound to" another element or layer, there may be no intervening elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0116] When applied to values, the term "approximately" means that the calculation or measurement allows for some slight imprecision in the value (approximately the exactness of the value; approximately or reasonably close to the value; nearly). If for some reason the imprecision provided by "approximately" is not understood in this ordinary sense in the art, then "approximately" as used herein at least indicates the variation that may result from ordinary methods of measuring or using such parameters. For example, the terms "generally", "about", and "substantially" may be used herein to indicate within manufacturing tolerances. Whether or not modified by the word "approximately", the claims include amounts equivalent to the quantity.

[0117] 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 may only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, the "first", "second" and other numerical terms used in this article do not mean sequence or order. Therefore, without departing from the teaching of the exemplary embodiment, the first element, component, region, layer or section discussed below may be referred to as the second element, component, region, layer or section.

[0118] For ease of description, spatially relative terms, such as "inside," "outside," "below," "below," "below," "above," "on," and similar terms, are used herein to describe the relationship of one element or feature to another element or feature in the drawings. Spatially relative terms may be intended to cover different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over, an element described as being "below" or "below" other elements or features will subsequently be oriented to be "above" the other elements or features. Thus, the example term "below" may include both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein may be interpreted accordingly.

[0119] For the purpose of illustration and description, the foregoing description of the embodiments has been provided. It is not intended to be exhaustive or to limit the present disclosure. Independent elements, intended or stated uses or features of a particular embodiment are generally not limited to that particular embodiment, but are interchangeable where applicable and can be used in selected embodiments even if not specifically shown or described. It can also be varied in many ways. Such variations should not be considered as departing from the present disclosure, and all such modifications are intended to be included within the scope of the present disclosure.

Claims

1. A valve for a dual-flow filter-drier, comprising a valve body and a movable valve member arranged in the valve body; in, The valve body includes: a first end and a second end opposite the first end, the first and second ends defining a first inlet / outlet and a second inlet / outlet, respectively; a first intermediate portion between the first and second end portions; first and second ports located between the first end and the first intermediate portion, the second port being spaced apart from the first port such that the second port is closer to the first intermediate portion than the first port and such that the first port is closer to the first end than the second port; and third and fourth ports located between the first intermediate portion and the second end portion, the third port being spaced apart from the fourth port such that the third port is closer to the first intermediate portion than the fourth port and such that the fourth port is closer to the second end portion than the third port; Wherein, the movable valve component comprises: a third end and a fourth end opposite the third end, the third and fourth ends being in fluid communication with the first inlet / outlet and the second inlet / outlet of the valve body, respectively; a second intermediate portion between the third and fourth ends of the movable valve member; a fifth port located between the third end portion and the second intermediate portion, the fifth port being alignable with the second port of the valve body; a sixth port located between the third end portion and the second intermediate portion, the sixth port being alignable with the third port of the valve body; The movable valve member can move relative to the valve body between: a first position in which the movable valve member blocks and inhibits fluid flow through the second port and the fourth port, and in which the sixth port of the movable valve member is aligned with the third port of the valve body, whereby fluid flow is permitted along a first or forward fluid flow path defined as originating at the first inlet / outlet, exiting the valve via the first port, entering the valve via the aligned third and sixth ports, and exiting the second inlet / outlet; and a second position in which the movable valve member blocks and inhibits fluid flow through the third and first ports, and in which the fifth port of the movable valve member is aligned with the second port of the valve body, whereby fluid flow is permitted along a second or reverse fluid flow path defined as beginning at the second inlet / outlet, exiting the valve via the fourth port, entering the valve via the aligned fifth and second ports, and exiting the first inlet / outlet. 2 . The valve of claim 1 , further comprising a flow meter including a metering orifice and configured to be removably engaged with the fourth end of the movable valve member.

3. The valve according to claim 2, characterized in that: The flow meter is configured to be removably engaged with the fourth end of the movable valve member by press-fitting the flow meter into the fourth end of the movable valve member; or The flow meter includes a threaded portion configured to threadably engage with the threaded portion of the movable valve member.

4. The valve according to claim 2, characterized in that: The flow meter is configured to restrict fluid flow in a first or forward flow direction while allowing full fluid flow in a second or reverse flow direction; and / or When the outside coil is the evaporator coil, the flow meter is configured to act as a fixed orifice for the outside coil in heat pump mode and to allow full flow in the opposite direction in air conditioning mode.

5. The valve according to claim 1, characterized in that: The valve comprises a shuttle valve including first and second internal chambers cooperatively defined by a valve body and a movable valve member, the first internal chamber being in fluid communication with a first inlet / outlet defined by a first end of the valve body, the second internal chamber being in fluid communication with a second inlet / outlet defined by a second end of the valve body; The shuttle valve is configured so that: Pressurized fluid entering the first interior chamber via the first inlet / outlet is operable to urge the movable valve member to slide away from the first inlet / outlet toward an opposite end of the first interior chamber and toward the first position; and Pressurized fluid entering the second internal chamber via the second inlet / outlet is operable to urge the movable valve member to slide away from the second inlet or outlet toward the opposite end of the second internal chamber and toward the second position.

6. The valve according to claim 1, characterized in that The valve body and the movable valve member are configured to define: a first stop operable to inhibit sliding movement of the movable valve member within the valve body in a direction toward the second end beyond a first position to align the sixth port of the movable valve member with the third port of the valve body; and The second stop is operable to inhibit sliding movement of the movable valve member within the valve body in a direction toward the first end beyond the second position to align the fifth port of the movable valve member with the second port of the valve body.

7. The valve according to claim 6, characterized in that: a second intermediate portion of the movable valve member including opposing first and second wall portions defining a recessed portion therebetween; and The first intermediate portion of the valve body includes a curled portion that projects inwardly into a recessed portion of the movable valve member; whereby contact of the curled portion of the valve body with the first wall portion of the movable valve member is operable as a first stop which inhibits the movable valve member from sliding within the valve body beyond the first position; and Thereby the contact of the curled portion of the valve body with the second wall portion of the movable valve member may operate as a second stop which inhibits the movable valve member from sliding within the valve body beyond the second position.

8. The valve according to claim 1, characterized in that The movable valve member is slidably arranged within the valve body such that: Fluid flow into the first inlet / outlet applies pressure to the movable valve member to slidably move the movable valve member away from the first inlet / outlet toward the first position; Fluid flow into the second inlet / outlet applies pressure to the movable valve member to slidably move the movable valve member away from the second inlet / outlet toward the second position.

9. The valve according to claim 1, characterized in that: The first port includes a plurality of first ports spaced apart from each other along the valve body; The second port includes a plurality of second ports spaced apart from one another along the valve body; The third port includes a plurality of third ports spaced apart from one another along the valve body; The fourth port includes a plurality of fourth ports spaced apart from each other along the valve body; The fifth port comprises a plurality of fifth ports spaced apart from one another along the movable valve member; and The sixth port includes a plurality of sixth ports spaced apart from each other along the movable valve member.

10. The valve according to claim 1, characterized in that: The valve body comprises a tubular cylindrical valve body including a wall defining first, second, third and fourth ports; and / or The movable valve member comprises a cylindrical spool valve member.

11. A dual-flow filter-dryer comprising the valve according to any one of claims 1 to 10.

12. A dual-flow filter-dryer, comprising the valve according to any one of claims 1 to 10 arranged along a center line of the dual-flow filter-dryer.

13. A dual-flow filter-dryer, comprising the valve according to any one of claims 1 to 10, characterized in that: The valve includes a longitudinal centerline that is substantially aligned with a longitudinal centerline of the dual-flow filter-drier.

14. A dual-flow filter-dryer comprising: A valve according to any one of claims 1 to 10; a housing including one or more walls defining an interior compartment; one or more filter media within the interior compartment; and Desiccant in internal compartment.

15. The dual-flow filter-dryer according to claim 14, characterized in that: The one or more walls of the housing comprise a single wall defining an interior compartment, whereby the housing has a one-piece unitary construction; and / or The first and second ends of the valve body may protrude outwardly beyond the housing, whereby the first and second ends are exposed and accessible for connecting the valve to a liquid line in a reversible refrigeration system.

16. A dual-flow filter-dryer comprising: A valve according to any one of claims 1 to 10; a housing including one or more walls defining an interior compartment; a first porous element located within the interior compartment of the housing and disposed along an exterior surface of the valve body such that the first porous element is disposed over the second and third ports of the valve body; a desiccant located within the interior compartment of the housing and disposed above the first porous element; a second porous element located within the interior compartment of the housing and disposed above the desiccant; and A filter is located within the interior compartment of the housing and disposed above the second porous element.

17. The dual-flow filter-dryer according to claim 16, characterized in that: When the movable valve member is in the first position, a first or forward fluid flow path is defined as: originating at the first inlet / outlet of the valve body, flowing out through the first port of the valve body, through the filter, the second porous element, the desiccant and the first porous element, entering the valve body via the aligned third and sixth ports and flowing out through the second inlet / outlet; and When the movable valve member is in the second position, a second or reverse fluid flow path is defined as: starting from the second inlet / outlet of the valve body, flowing out through the fourth port of the valve body, passing through the filter, the second porous element, the desiccant and the first porous element, entering the valve body through the aligned second and fifth ports and flowing out from the first inlet / outlet.

18. A two-way valve for a dual-flow filter-drier, comprising: a valve body configured to be disposed within the dual-flow filter-dryer such that the valve body is centered relative to the dual-flow filter-dryer, the valve body including a first end and a second end opposite the first end, the first and second ends defining a first inlet / outlet and a second inlet / outlet, respectively; and A movable valve member slidably disposed within the valve body, the movable valve member being configured such that the movable valve member is movable within the valve body between: a first position in which fluid flow is permitted in a first or forward flow direction from the first inlet / outlet through the valve to the second inlet / outlet and in which the movable valve member blocks and inhibits fluid flow in a second or reverse flow direction from the second inlet / outlet through the valve to the first inlet / outlet; and A second position, in which fluid flow is permitted in a second or reverse flow direction from the second inlet / outlet through the valve to the first inlet / outlet, and in which the movable valve member blocks and inhibits fluid flow in a first or forward flow direction from the first inlet / outlet through the valve to the second inlet / outlet.

19. The valve of claim 18, further comprising a flow meter including a metering orifice and configured to removably engage an end of the movable valve member.

20. The valve according to claim 19, characterized in that: The flow meter is configured to be removably engaged with the end of the movable valve member by press-fitting the flow meter into the end of the movable valve member; or The flow meter includes a threaded portion configured to threadably engage with the threaded portion of the movable valve member.

21. The valve according to claim 18, characterized in that: The flow meter is configured to restrict fluid flow in a first or forward flow direction while allowing full fluid flow in a second or reverse flow direction; and When the outside coil is the evaporator coil, the flow meter is configured to act as a fixed orifice for the outside coil in heat pump mode and to allow full flow in the opposite direction in air conditioning mode.

22. The valve according to claim 18, characterized in that: The valve comprises a shuttle valve including first and second interior chambers cooperatively defined by a valve body and a movable valve member, the first interior chamber being in fluid communication with a first inlet / outlet defined by a second end of the valve body, the second interior chamber being in fluid communication with a second inlet / outlet defined by a second end of the valve body; The shuttle valve is configured so that: Pressurized fluid entering the first interior chamber via the first inlet / outlet is operable to urge the movable valve member to slide away from the first inlet / outlet toward an opposite end of the first interior chamber and toward the first position; and Pressurized fluid entering the second internal chamber via the second inlet / outlet is operable to urge the movable valve member to slide away from the second inlet or outlet toward the opposite end of the second internal chamber and toward the second position.

23. The valve according to claim 18, characterized in that The valve body and the movable valve member are configured to define: a first stop operable to inhibit sliding movement of the movable valve member within the valve body in a direction toward the second end beyond a first position; and The second stop is operable to inhibit sliding movement of the movable valve member within the valve body in a direction toward the first end beyond the second position.

24. The valve according to claim 23, characterized in that: The movable valve member includes opposing first and second wall portions defining a recess therebetween; and The valve body includes a curled portion that projects inwardly into a recessed portion of the movable valve member; Whereby contact of the curled portion of the valve body with the first wall portion of the movable valve member may operate as a first stop which inhibits the movable valve member from sliding within the valve body beyond the first position; Thereby the contact of the curled portion of the valve body with the second wall portion of the movable valve member may operate as a second stop which inhibits the movable valve member from sliding within the valve body beyond the second position.

25. The valve according to claim 18, characterized in that The movable valve member is slidably arranged within the valve body such that: Fluid flow into the first inlet / outlet applies pressure to the movable valve member to slidably move the movable valve member away from the first inlet / outlet toward the first position; and Fluid flow into the second inlet / outlet applies pressure to the movable valve member to slidably move the movable valve member away from the second inlet / outlet toward the second position.

26. A dual-flow filter-dryer comprising the valve according to any one of claims 18 to 25 arranged along the centerline of the dual-flow filter-dryer.

27. The dual-flow filter-dryer according to claim 26, characterized in that: The valve includes a longitudinal centerline that is substantially aligned with a longitudinal centerline of the dual flow filter-drier.

28. A dual-flow filter-dryer comprising: A valve according to any one of claims 18 to 25; a housing including one or more walls defining an interior compartment; one or more filter media within the interior compartment; and desiccant in the internal compartment; Features: When the movable valve member is in the first position, a first or forward fluid flow path is defined as: originating from a first inlet / outlet of the valve body, flowing out of the valve body, through the one or more filter media and the desiccant, into the valve body and out of a second inlet / outlet of the valve body; and When the movable valve member is in the second position, a second or reverse fluid flow path is defined from the second inlet / outlet of the valve body, out of the valve body, through the one or more filter media and the desiccant, into the valve body and out of the first inlet / outlet of the valve body.

29. The dual-flow filter-dryer according to claim 28, characterized in that: The one or more walls of the housing comprise a single wall defining an interior compartment, whereby the housing has a one-piece unitary structure; and / or The first and second ends of the valve body protrude outwardly beyond the housing, whereby the first and second ends are exposed and accessible for connecting the valve to a liquid line in a reversible refrigeration system.

30. A dual-flow filter-dryer comprising: A valve according to any one of claims 18 to 25; a housing including one or more walls defining an interior compartment; a first porous element located within the interior compartment of the housing and disposed along an exterior surface of the valve body; a desiccant located within the interior compartment of the housing and disposed above the first porous element; a second porous element located within the interior compartment of the housing and disposed above the desiccant; and A filter is located within the interior compartment of the housing and disposed above the second porous element.

31. The dual-flow filter-dryer according to claim 30, characterized in that: When the movable valve member is in the first position, a first or forward fluid flow path is defined as: originating from the first inlet / outlet of the valve body, flowing out of the valve body, through the filter, the second porous element, the desiccant and the first porous element, entering the valve body and flowing out of the second inlet / outlet of the valve body; and When the movable valve member is in the second position, a second or reverse fluid flow path is defined as: starting from the second inlet / outlet of the valve body, flowing out of the valve body, through the filter, the second porous element, the desiccant and the first porous element, entering the valve body and flowing out of the first inlet / outlet of the valve body.

32. A dual-flow filter-dryer comprising: a housing including one or more walls defining an interior compartment; one or more filter media within the interior compartment; desiccant in the internal compartment; A two-way valve disposed within the interior compartment such that the two-way valve is centered relative to the dual-flow filter-drier, the two-way valve comprising: a valve body having first and second ends defining a first inlet / outlet and a second inlet / outlet, respectively; and a movable valve member slidably disposed within the valve body, the movable valve member being configured such that the movable valve member is movable within the valve body between a first position and a second position; Features: When the movable valve member is in the first position, fluid flow is permitted in a first or forward flow direction from a first inlet / outlet of the valve body, out of the valve body, through the one or more filter media and the desiccant, into the valve body, and out of a second inlet / outlet of the valve body; When the movable valve member is in the second position, fluid flow is permitted in a second or reverse flow direction from the second inlet / outlet of the valve body, out of the valve body, through the one or more filter media and the desiccant, into the valve body, and out of the first inlet / outlet of the valve body; The movable valve member blocks and inhibits the flow of fluid in a second or reverse flow direction when the movable valve member is in the first position; and When the movable valve member is in the second position, the movable valve member blocks and inhibits the flow of fluid in a first or forward flow direction.

33. The dual-flow filter-dryer according to claim 32, characterized in that: The valve includes a longitudinal centerline that is substantially aligned with a longitudinal centerline of the dual flow filter-drier.

34. The dual flow filter-drier of claim 33, further comprising a flow meter including a metering orifice and configured to removably engage an end of the movable valve member.

35. The dual-flow filter-dryer according to claim 34, characterized in that: The flow meter is configured to be removably engaged with the end of the movable valve member by press-fitting the flow meter into the end of the movable valve member; or The flow meter includes a threaded portion configured to threadably engage with the threaded portion of the movable valve member.

36. The dual-flow filter-dryer according to claim 34, characterized in that: The flow meter is configured to restrict fluid flow in a first or forward flow direction while allowing full fluid flow in a second or reverse flow direction; and / or When the outside coil is the evaporator coil, the flow meter is configured to act as a fixed orifice for the outside coil in heat pump mode and to allow full flow in the opposite direction in air conditioning mode.

37. The dual-flow filter-dryer according to claim 34, characterized in that: The one or more walls of the housing comprise a single wall defining an interior compartment, whereby the housing has a one-piece unitary structure; and / or The first and second ends of the valve body protrude outwardly beyond the housing, whereby the first and second ends are exposed and accessible for connecting the valve to a liquid line in a reversible refrigeration system.

38. A dual flow filter-dryer according to any one of claims 34 to 37, wherein: The one or more filter media include: a first porous element located within the interior compartment of the housing and disposed along an exterior surface of the valve, the desiccant disposed above the first porous element; a second porous element located within the interior compartment of the housing and disposed above the desiccant; and a filter located within the interior compartment of the housing and disposed above the second porous element; in: When the movable valve member is in the first position, a first or forward fluid flow path is defined as: originating from the first inlet / outlet of the valve body, flowing out of the valve body, through the filter, the second porous element, the desiccant and the first porous element, entering the valve body and flowing out of the second inlet / outlet of the valve body; and When the movable valve member is in the second position, a second or reverse fluid flow path is defined as: starting from the second inlet / outlet of the valve body, flowing out of the valve body, through the filter, the second porous element, the desiccant and the first porous element, entering the valve body and flowing out of the first inlet / outlet of the valve body.

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