Display case including heat exchanger for reducing relative humidity
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25D-017/06
A47F-003/04
출원번호
US-0675710
(2007-09-28)
등록번호
US-8910488
(2014-12-16)
국제출원번호
PCT/US2007/079853
(2007-09-28)
§371/§102 date
20100226
(20100226)
국제공개번호
WO2009/041976
(2009-04-02)
발명자
/ 주소
Fung, Kwok Kwong
출원인 / 주소
Hill Phoenix, Inc.
대리인 / 주소
Foley & Lardner LLP
인용정보
피인용 횟수 :
1인용 특허 :
4
초록▼
A refrigerated case includes a housing including an interior display volume and a heat exchanger. The heat exchanger includes a circuit defined by a heat exchanger section including a plurality of tubes that define a flow path, a reheat section including a reheat tube, and a connecting tube fluidly
A refrigerated case includes a housing including an interior display volume and a heat exchanger. The heat exchanger includes a circuit defined by a heat exchanger section including a plurality of tubes that define a flow path, a reheat section including a reheat tube, and a connecting tube fluidly connecting the flow path of the heat exchanger section with the reheat tube. Air flows over the plurality of tubes of the heat exchanger section and rejects heat to a refrigerant flowing through the plurality of tubes to heat the refrigerant. The heated refrigerant then flows through the reheat tube. As the air passes over the reheat tube, the air accepts heat from the heated refrigerant flowing through the reheat tube.
대표청구항▼
1. A refrigerated case comprising: a housing including an interior display volume; anda heat exchanger including a plurality of heat exchanger circuits that define a first number of tube passes, and at least one reheat circuit that defines a second number of tube passes, the second number of tube pa
1. A refrigerated case comprising: a housing including an interior display volume; anda heat exchanger including a plurality of heat exchanger circuits that define a first number of tube passes, and at least one reheat circuit that defines a second number of tube passes, the second number of tube passes being greater than the first number of tube passes wherein the refrigerant in the at least one reheat circuit heated to a higher temperature than refrigerant in the heat exchanger circuits, the heat exchanger also including at least one reheat tube, and a connecting tube fluidly connecting the at least one reheat circuit with the at least one reheat tube, wherein the higher temperature refrigerant flows from the at least one reheat circuit of the heat exchanger section, through the connecting tube and then through the reheat tube,wherein an airflow flows over the plurality of heat exchanger circuits and the at least one reheat circuit and rejects heat to a refrigerant flowing therethrough to heat the refrigerant, and the airflow accepts heat from the higher temperature refrigerant that flows through the at least one reheat tube. 2. The refrigerated case as recited in claim 1 wherein a fan draws the airflow into the heat exchanger, and the airflow from the heat exchanger is directed upwardly through a rear duct, horizontally through an upper conduit and then downwardly to form an air curtain. 3. The refrigerated case as recited in claim 2 wherein a rear duct panel separates the rear duct from the interior display volume, the rear duct panel including a plurality of holes, and the air flowing through the rear duct diverges and flows through the plurality of holes in a generally horizontal direction. 4. The refrigerated case as recited in claim 1 wherein the heat exchanger includes two plates, the first number of tube passes and the second number of tube passes and the at least one reheat tube extend between the plurality of plates, and generally perpendicular to the airflow. 5. The refrigerated case as recited in claim 1 wherein the airflow enters the heat exchanger through an inlet side and exits the heat exchanger through an outlet side, and the refrigerant flows from the outlet side to the inlet side as the refrigerant accepts heat from the airflow. 6. The refrigerated case as recited in claim 5 wherein the at least one reheat tube is positioned near the outlet side of the heat exchanger, and the airflow accepts heat from the heated refrigerant flowing through the at least one reheat tube before exiting the heat exchanger through the outlet side. 7. The refrigerated case as recited in claim 1 wherein the refrigerant is a solution comprising at least one of glycol and water. 8. The refrigerated case as recited in claim 1 wherein the first number of tube passes is four and the second number of tube passes is eight. 9. The refrigerated case as recited in claim 1 wherein the plurality of first circuits are each arranged in a planar configuration and the at least one second circuit is arranged in a non-planar configuration. 10. The refrigerated case as recited in claim 9 wherein each of the plurality of heat exchanger circuits includes a first tube, a second tube, a third tube and a fourth tube, and the first tube and the second tube are connected with a first u-shaped connecting tube, the second tube and the third tube are connected with a second u-shaped connecting tube, and the third tube and the fourth tube are connected with a third u-shaped connecting tube. 11. The refrigerated case as recited in claim 1 wherein the refrigerant flows through the at least one reheat circuit, directly to the connecting tube, and then directly to the at least one reheat tube. 12. The refrigerated case as recited in claim 1 wherein the at least one reheat tube is disposed proximate an airflow outlet of the heat exchanger, and the connecting tube has a first end fluidly coupled to the at least one reheat circuit proximate an airflow inlet of the heat exchanger and a second end fluidly coupled to the reheat tube proximate the airflow outlet. 13. The refrigerated case as recited in claim 1 wherein the airflow first flows over the plurality of heat exchanger circuits and the at least one reheat circuit and then flows over the at least one reheat tube. 14. A refrigerated case comprising: a housing including an interior display volume;a fan that draws an airflow into a heat exchanger; andthe heat exchanger including a plurality of heat exchanger circuits that define a first number of tube passes, and at least one reheat circuit that defines a second number of tube passes, the second number of tube passes being greater than the first number of tube passes wherein the refrigerant in the at least one heated to a higher temperature than refrigerant in the heat exchanger circuits, the heat exchanger also including at least one reheat tube, and a connecting tube fluidly connecting the at least one reheat circuit with the at least one reheat tube, wherein the higher temperature refrigerant flows from the at least one reheat circuit, through the connecting tube and then through the reheat tube,wherein the airflow flows over the plurality of heat exchanger circuits and the at least one reheat circuit from an inlet side of the heat exchanger to an outlet side of the heat exchanger and rejects heat to a refrigerant flowing therethrough to heat the refrigerant, andwherein the at least one reheat tube is positioned near the outlet side of the heat exchanger, and the airflow accepts heat from the higher temperature refrigerant from the at least one reheat circuit that flows through the reheat tube before exiting the heat exchanger through the outlet side. 15. A method of cooling a display case, the method comprising the steps of: directing an airflow through a heat exchanger, where the heat exchanger includes a plurality of heat exchanger circuits that define a first number of tube passes, and at least one reheat circuit that defines a second number of tube passes, the second number of tube passes being greater than the first number of tube passes so that refrigerant in the at least one reheat circuit is heated to a higher temperature than refrigerant in the heat exchanger circuit, the heat exchanger is also including at least one reheat tube, and a connecting tube fluidly connecting the at least one reheat circuit with the at least one reheat tube, wherein the higher temperature refrigerant flows from the at least one reheat circuit, through the connecting tube and then through the reheat tube;exchanging heat between the airflow and a refrigerant in the heat exchanger circuits and the at least one reheat circuit to heat the refrigerant and cool the air in the heat exchanger;exchanging heat between the airflow and the higher temperature refrigerant from the at least one reheat circuit in the at least one reheat tube to heat the airflow prior to exiting the heat exchanger; anddirecting the airflow into an interior display volume of the display case.
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이 특허에 인용된 특허 (4)
Rigney,Richard N.; Oswald,Ian D., Cooling system for a commercial aircraft galley.
Eber, David H.; Glamm, Paul R.; Johnson, Dwayne L.; Earhart, Jr., Walter; Klouda, John F.; Kiel, Brian J.; Hulst, Dale A., Refrigeration circuit with reheat coil.
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