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A receiver for a refrigeration system includes an enclosure with an inlet for liquid refrigerant at a first end and an outlet for the liquid refrigerant at a second end. A heat exchanger with an inlet and an outlet for refrigerant vapor is surrounded by the enclosure. The heat exchanger includes baf

A receiver for a refrigeration system includes an enclosure with an inlet for liquid refrigerant at a first end and an outlet for the liquid refrigerant at a second end. A heat exchanger with an inlet and an outlet for refrigerant vapor is surrounded by the enclosure. The heat exchanger includes baffles so that alternatingly positioned flow passages are positioned on opposing sides of the enclosure.

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1. A receiver for a refrigeration system comprising: an enclosure for collecting liquid refrigerant, the enclosure having an inlet for the liquid refrigerant at and through a first end and an outlet for the liquid refrigerant at and through a second end, the first end and the second end being at opp

1. A receiver for a refrigeration system comprising: an enclosure for collecting liquid refrigerant, the enclosure having an inlet for the liquid refrigerant at and through a first end and an outlet for the liquid refrigerant at and through a second end, the first end and the second end being at opposing distal ends of the enclosure, the distal ends each having a concave shape that extends outward from an interior of the enclosure in a direction of their respective inlet and outlet;a heat exchanger with an exchanger inlet and an exchanger outlet for receiving at least refrigerant vapor and transferring heat from the liquid refrigerant to the refrigerant vapor, the exchanger inlet being disposed at and through the second end and the exchanger outlet being disposed at and through the first end, a cross-section of the exchanger outlet and a cross-section of the exchanger inlet are each wider than a cross-section of the inlet and a cross-section of the outlet of the enclosure;wherein the heat exchanger is surrounded by the enclosure;wherein the heat exchanger includes: a serpentine tube for passage of at least refrigerant vapor through the enclosure from the second end to the first end;baffles that define a flow path for the liquid refrigerant through the receiver;wherein the baffles are in a stacked configuration with only the serpentine tube between adjacent baffles; andwherein the flow path is constrained to a zig-zag configuration among the baffles. 2. The receiver of claim 1 wherein each baffle has an outer periphery, a first portion of which conforms in shape to a shape of an interior of the enclosure and a second portion of which does not conform to the shape of the interior of the enclosure so that the flow path for the liquid refrigerant is present in a space between the second portion of the outer periphery and the interior of the enclosure. 3. The receiver of claim 2 wherein the first portion of the outer periphery of the baffle is in contact with the interior of the enclosure so that flow of the liquid refrigerant is directed to the flow path. 4. The receiver of claim 2, wherein the baffles are provided with one or more holes through which the tube passes. 5. The receiver of claim 4 wherein the tube is in contact with the baffles at the one or more holes so that flow of the liquid refrigerant is directed to the flow path. 6. A receiver for a refrigeration system comprising: an enclosure with an inlet for liquid refrigerant at and through a first end and an outlet for the liquid refrigerant at and through a second end, the first and second ends each having a concave shape that extends outward from an interior of the enclosure toward their respective inlet and outlet; anda heat exchanger with an exchanger inlet and an exchanger outlet for at least refrigerant vapor to transfer heat from the liquid refrigerant to the refrigerant vapor, the exchanger inlet being formed on the concave shape of the second end, the exchanger outlet being formed on the concave shape of the first end;wherein the heat exchanger is surrounded by the enclosure, andwherein the heat exchanger includes: a tube for passage of at least the refrigerant vapor, the tube having a cross-section that is wider than a cross-section of the inlet and a cross-section of the outlet of the enclosure; andstack baffles with planar surfaces so that the liquid refrigerant flows on and across the planar surfaces, from one baffle to a next baffle, in alternating opposite directions, each stack baffle having no more than three holes for receiving the tube;wherein the tube includes a plurality of straight portions joined by bend portions, each straight portion extending through the holes in every stack baffle within the enclosure;wherein there is only the tube between the planar surfaces of adjacent baffles. 7. The receiver of claim 6 wherein the tube is a serpentine tube. 8. The receiver of claim 6 wherein each stack baffle has an outer periphery, a first portion of which conforms in shape to a shape of an interior of the enclosure and a second portion of which does not conform to the shape of the interior of the enclosure so that a flow passage for the liquid refrigerant is present in a space between the second portion of the outer periphery and the interior of the enclosure. 9. The receiver of claim 8 wherein the first portion of the outer periphery of the stack baffles is in contact with the interior of the enclosure so that flow of the liquid refrigerant is directed to the flow passage. 10. The receiver of claim 8, wherein the stack baffles are provided with one or more holes through which the tube passes. 11. The receiver of claim 10 wherein the tube is in contact with the stack baffles at the one or more holes so that flow of the liquid refrigerant is directed to the flow passage. 12. The receiver of claim 11 further comprising: at least two of the stack baffles; andwherein a first one of the flow passages formed by a first one of the at least two stack baffles is at a first side of the enclosure; andwherein a second one of the flow passages formed by a second one of the at least two stack baffles is at a second side of the enclosure so that the liquid refrigerant is constrained to flow from the first side of the enclosure to the second side of the enclosure to effectively transfer heat to the tube.