Refrigerant distribution apparatus and methods for transport refrigeration system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25B-049/00
F25B-009/00
F25B-001/10
F25B-041/04
출원번호
US-0576051
(2011-03-07)
등록번호
US-9909786
(2018-03-06)
국제출원번호
PCT/US2011/027363
(2011-03-07)
§371/§102 date
20120730
(20120730)
국제공개번호
WO2011/112495
(2011-09-15)
발명자
/ 주소
Liu, Lucy Yi
Duraisamy, Suresh
Hofsdal, Gilbert B.
Huff, Hans-Joachim
Patriak, Michal
출원인 / 주소
CARRIER CORPORATION
대리인 / 주소
Cantor Colburn LLP
인용정보
피인용 횟수 :
0인용 특허 :
9
초록▼
A method for distributing a refrigerant charge level in a refrigerant vapor compression system includes restarting a stopped refrigerant compression device in a first mode; operating a primary expansion device independent of refrigerant heat absorption heat exchanger superheat; comparing a condition
A method for distributing a refrigerant charge level in a refrigerant vapor compression system includes restarting a stopped refrigerant compression device in a first mode; operating a primary expansion device independent of refrigerant heat absorption heat exchanger superheat; comparing a condition at a refrigerant reservoir to a prescribed condition; wherein when the condition is below the prescribed condition for a prescribed interval, operating the primary expansion device to control the refrigerant heat absorption heat exchanger superheat; and transitioning the refrigerant vapor compression system to a second mode.
대표청구항▼
1. A method for distributing a refrigerant charge level in a refrigerant vapor compression system, the refrigerant vapor compression system having a refrigerant circuit including a refrigerant compression device, a refrigerant heat rejection heat exchanger downstream of said compression device, a re
1. A method for distributing a refrigerant charge level in a refrigerant vapor compression system, the refrigerant vapor compression system having a refrigerant circuit including a refrigerant compression device, a refrigerant heat rejection heat exchanger downstream of said compression device, a refrigerant reservoir downstream of the heat rejection heat exchanger, a refrigerant heat absorption heat exchanger downstream of said refrigerant reservoir, and a primary expansion device disposed in the refrigerant circuit downstream of said refrigerant heat rejection heat exchanger and upstream of said refrigerant heat absorption heat exchanger, said method comprising: operating the refrigerant compression device at a speed;stopping the refrigerant compression device;after the refrigerant compression device has stopped, restarting the refrigerant compression device in a first mode;in the first mode, setting the primary expansion device to a prescribed degree of opening;in the first mode, comparing a condition at the refrigerant reservoir to a prescribed condition;in the first mode, in response to the condition being below the prescribed condition for a prescribed time interval transitioning the refrigerant vapor compression system to a second mode, the second mode comprising operating the primary expansion device to control the refrigerant heat absorption heat exchanger superheat;wherein the condition is a pressure condition and the prescribed condition is a prescribed pressure threshold;wherein the prescribed pressure threshold is a critical refrigerant pressure. 2. The method of claim 1, wherein, in the first mode, in response to the condition being above the prescribed condition: pulsing an economizer solenoid valve in a refrigerant vapor line coupling the refrigerant reservoir to an intermediate port of the refrigerant compression device. 3. The method of claim 1, wherein, in the first mode, in response to the condition being above the prescribed condition: pulsing a liquid injection valve in a liquid injection line between the refrigerant reservoir and an inlet port of the refrigerant compression device. 4. The method of claim 1, wherein the refrigerant vapor compression system is configured to use C02 refrigerant. 5. The method of claim 1, wherein setting the primary expansion device to a prescribed degree of opening includes increasing an opening of the primary expansion device by a set amount. 6. The method of claim 1, wherein the second mode is an economized mode. 7. A method for distributing a refrigerant charge level in a refrigerant vapor compression system, the refrigerant vapor compression system having a refrigerant circuit including a refrigerant compression device, a refrigerant heat rejection heat exchanger downstream of said compression device, a refrigerant reservoir downstream of the heat rejection heat exchanger, a refrigerant heat absorption heat exchanger downstream of said refrigerant reservoir, and a primary expansion device disposed in the refrigerant circuit downstream of said refrigerant heat rejection heat exchanger and upstream of said refrigerant heat absorption heat exchanger, said method comprising: operating the refrigerant compression device at a speed;stopping the refrigerant compression device;after the refrigerant compression device has stopped, restarting the refrigerant compression device in a first mode;in the first mode, setting the primary expansion device to a prescribed degree of opening;in the first mode, comparing a condition at the refrigerant reservoir to a prescribed condition;in the first mode, in response to the condition being below the prescribed condition for a prescribed time interval transitioning the refrigerant vapor compression system to a second mode, the second mode comprising operating the primary expansion device to control the refrigerant heat absorption heat exchanger superheat;further comprising sensing pressure at the refrigerant reservoir using a sensor, wherein the condition is a supercritical condition of the refrigerant in the refrigerant reservoir, wherein the refrigerant vapor compression system is configured to use C02 refrigerant. 8. The method of claim 7, wherein the second mode is an economized mode. 9. The method of claim 7, wherein prior to operating in the first mode, operating the refrigerant compression device with an unload service valve open; and draining refrigerant from the refrigerant reservoir using a downstream refrigerant flow control device. 10. The method of claim 7, wherein setting the primary expansion device to a prescribed degree of opening includes increasing an opening of the primary expansion device by a set amount.
Koppineedi, Srinivasa Rao; Sulc, Vladimir; Waldschmidt, William L.; Wermager, Joe A., Temperature control system with refrigerant recovery arrangement.
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