Exemplary embodiments of the present disclosure relate to a heat exchanger, and more particularly, to a heat exchanger for use in a condenser of a container refrigeration unit.
The heat rejected by a condenser coil of a container refrigeration unit is typically used to prevent water within the drain system of the unit from freezing. In existing container refrigeration units, the condenser coil is a tube-fin heat exchanger including a plurality of copper tubes extending through aligned sheets that form fins. Because the bend portion of the copper tubes cannot extend through the sheets of fins, the conduits of the drain system are routed under or behind a mainframe to avoid interference with the condenser coil. However, this indirect routing of the drain system adds complexity and cost to the system.
According to an embodiment, a heat exchanger includes a first manifold, a second manifold, and a body including a plurality of heat exchange tube segments arranged in spaced parallel relationship and fluidly coupling the first manifold and the second manifold. At least one opening is formed in the body. The at least one opening extends through the body.
In addition to one or more of the features described above, or as an alternative, in further embodiments the at least one opening is arranged at a central portion of the body.
In addition to one or more of the features described above, or as an alternative, in further embodiments the at least one opening is arranged at an edge of the body.
In addition to one or more of the features described above, or as an alternative, in further embodiments a bent section of at least one of the plurality of heat exchange tube segments is bent out of a plane of the at least one of the plurality of heat exchange tube segments, the at least one opening being formed by the bent section of the at least one of the plurality of heat exchange tube segments.
In addition to one or more of the features described above, or as an alternative, in further embodiments the plurality of heat exchange tube segments includes a first heat exchange tube segment having a first bent section and a second heat exchange tube segment having a second bent section, the at least one opening being defined between the first bent section and the second bent section.
In addition to one or more of the features described above, or as an alternative, in further embodiments the first bent section is bent in a first direction and the second bend section is bent in a second direction, opposite the first direction, the first bent section and the second bent section being aligned.
In addition to one or more of the features described above, or as an alternative, in further embodiments the heat exchanger further comprises a plurality of fins disposed between adjacent heat exchange tube segments of the plurality of heat exchange tube segments.
In addition to one or more of the features described above, or as an alternative, in further embodiments a fin is not connected to the at least one of the plurality of heat exchange tube segments at the bent section.
In addition to one or more of the features described above, or as an alternative, in further embodiments each of the plurality of heat exchange tube segments defines a plurality of discrete flow channels that extend over a length of the plurality of heat exchange tube segments.
In addition to one or more of the features described above, or as an alternative, in further embodiments at least one fold is formed in the plurality of heat exchange tube segments include a fold, the fold being defined about an axis extending generally perpendicular to a longitudinal axis of the plurality of heat exchange tube segments.
In addition to one or more of the features described above, or as an alternative, in further embodiments the at least one fold includes a first fold and a second fold such that the body of the heat exchanger is generally U-shaped.
In addition to one or more of the features described above, or as an alternative, in further embodiments the heat exchanger is configured to operate as a condenser in a container refrigeration unit.
According to an embodiment, a refrigeration system includes a support surface, a heat exchanger mounted to the support surface, the heat exchanger including a body and an opening extending through the body, and a drain system associated with the support surface. A portion of the drain system extends through the opening of the heat exchanger.
In addition to one or more of the features described above, or as an alternative, in further embodiments the drain system includes a conduit extendable through the opening of the heat exchanger.
In addition to one or more of the features described above, or as an alternative, in further embodiments the heat exchanger is a microchannel heat exchanger.
In addition to one or more of the features described above, or as an alternative, in further embodiments the body of the heat exchanger further comprises a plurality of heat exchange tube segments arranged in spaced parallel relationship and fluidly coupling a first manifold and a second manifold, the opening being defined by at least one of the plurality of heat exchange tube segments.
In addition to one or more of the features described above, or as an alternative, in further embodiments a bent section of at least one of the plurality of heat exchange tube segments is bent out of a plane of the at least one of the plurality of heat exchange tube segments, the opening being defined by the bent section of the at least one of the plurality of heat exchange tube segments.
In addition to one or more of the features described above, or as an alternative, in further embodiments the opening is arranged at a central portion of the body of the heat exchanger.
In addition to one or more of the features described above, or as an alternative, in further embodiments the opening is arranged at an edge of the body of the heat exchanger.
In addition to one or more of the features described above, or as an alternative, in further embodiments the refrigeration system is a container refrigeration unit.
The following descriptions should not be considered limiting in any way. With reference to the accompanying drawings, like elements are numbered alike:
A detailed description of one or more embodiments of the disclosed apparatus and method are presented herein by way of exemplification and not limitation with reference to the Figures.
Referring now to
36 Within this vapor compression cycle 20, the refrigerant flows in a counterclockwise direction as indicated by the arrow. The compressor 22 receives refrigerant vapor from the evaporator 24 and compresses it to a higher temperature and pressure, with the relatively hot vapor then passing to the condenser 26 where it is cooled and condensed to a liquid state by a heat exchange relationship with a cooling medium (not shown) such as air. The liquid refrigerant R then passes from the condenser 26 to an expansion device 28, wherein the refrigerant R is expanded to a low temperature two-phase liquid/vapor state as it passes to the evaporator 24. The relatively cold two-phase refrigerant mixture then passing to the evaporator 24 where it is boiled to a vapor state by a heat exchange relationship with a heating medium (not shown) such as air. The low pressure vapor then returns to the compressor 22 where the cycle is repeated.
Referring now to
Referring now to
The heat exchange tube segments 36 disclosed herein include a plurality of fins 50. In some embodiments, the fins 50 are formed from a continuous strip of fin material folded in a ribbon-like serpentine fashion thereby providing a plurality of closely spaced fins 50 that extend generally orthogonally to the heat exchange tube segments 36. Thermal energy exchange between one or more fluids within the heat exchange tube segments 36 and an air flow A occurs through the outside surfaces 44, 46 of the heat exchange tube segments 36 collectively forming a primary heat exchange surface, and also through thermal energy exchange with the fins 50, which defines a secondary heat exchange surface.
One or more folds may be formed in each heat exchange tube segment 36 of the heat exchanger 30. The heat exchange tube segments 36 are typically folded about an axis extending perpendicular to the longitudinal axis of the heat exchange tube segments 36. In the illustrated, non-limiting embodiment of
With continued reference to
In an embodiment, a section 54 of at least one of the plurality of heat exchange tube segments 36, as best shown in
In an embodiment, a section of one or more additional heat exchange tube segments 36, such as the heat exchange tube segments 36 located directly adjacent to the first heat exchange tube segment 36a and/or the second heat exchange tube segment 36b, respectively, may also be bent to accommodate the bend of the first section 54a and the second section 54b. However, it should be understood that the total number of heat exchange tube segments 36 that are bent to form the opening 52 is dependent on the size of the opening 52 being formed. Embodiments where a portion of only a single heat exchange tube segment 36 is bent to form an opening 52 are within the scope of the disclosure.
To accommodate the bent section 54 of one or more of the plurality of heat exchange tube segments 36, in an embodiment, fins 50 are not affixed to the portion or section 54 of the heat exchange tube segments 36 that are configured to bend to form an opening 52. In the illustrated, non-limiting embodiment, no fins 50 are arranged at either side of the one or more bent sections 54 of the plurality of heat exchange tube segments 36. However, embodiments where the fins 50 are removed from only a single side of a bent section 54, or alternatively, from only a portion of a side of a bent section 54 of a heat exchange tube segment 36 are contemplated herein.
In the illustrated, non-limiting embodiment of
A heat exchanger 30 having one or more openings 52 formed in the body thereof may be used as a condenser coil, such as in a transport or container refrigeration unit. With reference to
With continued reference now to
In addition, it has been determined that bending a section 54 of one or more of the heat exchange tube segments 36 has a minimal or negligible impact on the operation of the heat exchanger 30. Accordingly, the drain conduit 62 may extend through one or more openings 52 formed in the heat exchanger 30 without substantially affecting operation of the HVAC&R system. With this configuration of the heat exchanger 30 and drain conduit 62, there is no longer a need to route the conduit 62 behind the mainframe 60 via a pair of holes formed at opposite sides of the body of the heat exchanger 30. As a result, the overall design of the mainframe 60 may be simplified, such as by eliminating the need for 2-6 holes formed in the mainframe 60, drain fittings and sealant application. Further, this reduction in complexity may similarly result in a cost reduction. A heat exchanger 30 having one or more openings 52 formed therein is also suitable for use in retro-fit applications.
The term “about” is intended to include the degree of error associated with measurement of the particular quantity based upon the equipment available at the time of filing the application.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, element components, and/or groups thereof.
While the present disclosure has been described with reference to an exemplary embodiment or embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present disclosure. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the present disclosure without departing from the essential scope thereof. Therefore, it is intended that the present disclosure not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this present disclosure, but that the present disclosure will include all embodiments falling within the scope of the claims.
This application claims the benefit of U.S. Application No. 63/180,927 filed Apr. 28, 2021, the disclosure of which is incorporated herein by reference in its entirety.
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Number | Date | Country | |
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63180927 | Apr 2021 | US |