Transport refrigeration system and methods for same to address dynamic conditions
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25B-041/00
F25B-049/00
F25B-049/02
출원번호
US-0511800
(2010-12-09)
등록번호
US-10107536
(2018-10-23)
국제출원번호
PCT/US2010/059606
(2010-12-09)
§371/§102 date
20120524
(20120524)
국제공개번호
WO2011/075373
(2011-06-23)
발명자
/ 주소
Senf, Jr., Raymond L.
Reason, John R.
출원인 / 주소
CARRIER CORPORATION
대리인 / 주소
Cantor Colburn LLP
인용정보
피인용 횟수 :
0인용 특허 :
47
초록▼
In a refrigeration system having a compressor, a heat rejection heat exchanger, a heat absorption heat exchanger, and a controller for controlling the same, embodiments of a system, apparatus and methods for the same can control at least one refrigeration system component such as an expansion valve
In a refrigeration system having a compressor, a heat rejection heat exchanger, a heat absorption heat exchanger, and a controller for controlling the same, embodiments of a system, apparatus and methods for the same can control at least one refrigeration system component such as an expansion valve responsive to dynamic system conditions.
대표청구항▼
1. In a transport refrigeration unit having a compressor, a condenser, an evaporator, an economizer, a second expansion valve coupled between the economizer and the compressor, and a controller, and a first expansion valve upstream of the evaporator, a process comprising: detecting a capacity increa
1. In a transport refrigeration unit having a compressor, a condenser, an evaporator, an economizer, a second expansion valve coupled between the economizer and the compressor, and a controller, and a first expansion valve upstream of the evaporator, a process comprising: detecting a capacity increase mode transition for the economizer; andadaptively controlling an injection flow rate for the economizer during at least a portion of the capacity increase mode transition in response to one of available pressure, available power or available current to the transport refrigeration unit;wherein the adaptively controlling comprises selectively operating the second expansion valve through a transition from a first non-zero flow rate to a second higher non-zero flow rate using system conditions to control a rate of transition from the first non-zero flow rate to the second higher non-zero flow rate responsive to the capacity increase mode transition. 2. The process of claim 1, where the system conditions set an adaptive speed of transition from the first flow rate to the second flow rate or the system conditions set a prescribed time period of transition from the first flow rate to the second flow rate. 3. The process of claim 2, where the adaptive control is an adaptive PID control of an economizer gas injection valve, where the available power is power remaining to the transport refrigeration unit under a system threshold. 4. The process of claim 1, where the first flow rate is a non-zero injection flow rate less than 100%, the second flow rate is 100% injection flow rate, and the prescribed time period for transitioning from the first flow rate to the second flow rate is greater than ten seconds. 5. The process of claim 1, where the transition is step wise, intermittent, linear, non-linear, gradually, or continuous and where the prescribed time period is based on a throughput interval of the evaporator or the prescribed time period is 15-300 seconds, and where the step wise transition is a 10% increase every twenty seconds, every ten seconds, or every five seconds. 6. The process of claim 1, where the selectively operating comprises soft-starting the economizer. 7. The process of claim 1, where the selectively operating comprises proactively controlling a transition to a high capacity mode of the transport refrigeration unit, where detecting the mode transition detects energizing of a vapor flow of an economized transport refrigeration unit. 8. A computer program product comprising a non-transitory computer usable storage medium to store a computer readable program that, when executed on a computer, causes the computer to perform operations to operate a transport refrigeration unit, the operations comprising: operate the transport refrigeration unit in a first mode;control an economizer to transition the transport refrigeration unit to a higher capacity mode; andincrease gradually a gas flow rate from the economizer to over a prescribed time at said transition;wherein the increasing the gas flow rate from the economizer comprises selectively operating a second expansion valve through the transition from a first non-zero flow rate to a second higher non-zero flow rate using system conditions to control a rate of transition from the first non-zero flow rate to the second higher non-zero flow rate responsive to the transition. 9. The computer program product of claim 8, where the operations comprising increase gradually a gas flow rate includes increasing from a 0% injection flow rate to a 100% injection flow rate.
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이 특허에 인용된 특허 (47)
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Harrington Robert L. (Eden Prairie MN) Gustafson Alan D. (Eden Prairie MN), Methods of operating a refrigeration unit in predetermined high and low ambient temperatures.
Freund Peter W. (Bloomington MN) Sjoholm Lars I. (Burnsville MN) LaBossiere Joseph E. (Lino Lakes MN), Refrigeration system and method utilizing combined economizer and engine coolant heat exchanger.
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Brendel Thomas E. (Fayettville NY) Lane L. Thomas (Manlius NY), Transport refrigeration system having compressor over-temperature protection in all operating modes.
Haley James H. (Eden Prairie MN) Drake Gillian M. (Bloomington MN) Herrig Doyle G. (Elko MN), Transport temperature control system having enhanced low ambient heat capacity.
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