Method and system for controlling operation of evaporator fans in a transport refrigeration system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25B-005/02
F25B-049/02
F25D-017/06
F25B-039/02
F25D-011/02
F25D-029/00
출원번호
US-0268022
(2014-05-02)
등록번호
US-10254027
(2019-04-09)
발명자
/ 주소
Koppineedi, Srinivasa Rao
Srichai, Panayu Robert
출원인 / 주소
THERMO KING CORPORATION
대리인 / 주소
Hamre, Schumann, Mueller & Larson, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
6
초록▼
Methods and systems for controlling the operation of the evaporator fans in a transport refrigeration system (TRS) are described. In some examples, the TRS is a multi-zone temperature control system (MTCS). The methods and systems described herein generally dynamically control a plurality of system
Methods and systems for controlling the operation of the evaporator fans in a transport refrigeration system (TRS) are described. In some examples, the TRS is a multi-zone temperature control system (MTCS). The methods and systems described herein generally dynamically control a plurality of system fans in MTCSs in instances where running the system fans can lead to inefficiencies in energy consumption and fluctuations in temperature control.
대표청구항▼
1. A multi-zone temperature control system that is configured to cool a plurality of zones, comprising: a host unit;at least one remote unit that is connected to the host unit; \wherein each of the host unit and the at least one remote unit includes an evaporator fan; anda controller that is configu
1. A multi-zone temperature control system that is configured to cool a plurality of zones, comprising: a host unit;at least one remote unit that is connected to the host unit; \wherein each of the host unit and the at least one remote unit includes an evaporator fan; anda controller that is configured to: determine a first zone with the highest temperature set point relative to the other of the plurality of zones;determine whether operation of the evaporator fan of a zone of the plurality of zones other than the first zone is capable of cooling the zone of the plurality of zones other than the first zone when the first zone is operated in a COOL state;operate the zone of the plurality of zones other than the first zone in a COOL state when the operation of the evaporator fan of the zone of the plurality of zones other than the first zone is capable of cooling the zone of the plurality of zones other than the first zone and operate the zone of the plurality of zones other than the first zone in a NULL state when the operation of the evaporator fan of the zone of the plurality of zones other than the first zone is capable of cooling the zone other than the first zone;when the zone of the plurality of zones other than the first zone is operated in the NULL state for a first predetermined amount of time, determine whether the first zone has reached the set point and operate the first zone in the COOL state for a second predetermined amount of time when the first zone has not reached the set point after the first predetermined amount of time,at the end of the second predetermined amount of time, determine whether the operation of the evaporator fan of the zone of the plurality of zones other than the first zone is capable of cooling the zone of the plurality of zones other than the first zone, andwhen the set point of the zone with the highest temperature set point is satisfied, switch the first zone to the NULL state. 2. The system of claim 1, wherein determining whether the operation of the evaporator fan of the zone of the plurality of zones other than the first zone is capable of cooling the zone of the plurality of zones other than the first zone is based on a difference between a return air temperature and a discharge air temperature. 3. The system of claim 1, wherein the controller is configured to set a first timer after switching the zone of the plurality of zones other than the first zone to the NULL state. 4. The system of claim 3, wherein the controller is configured to operate the first zone in the COOL state if the set point for the zone with the highest set point is not reached after the first timer expires. 5. The system of claim 1, wherein determining whether the operation of the evaporator fan of the zone of the plurality of zones other than the first zone is capable of cooling the zone of the plurality of zones other than the first zone is based on a suction pressure. 6. A method of controlling an operation of evaporator fans in a multi-zone temperature control system that includes a controller, a host unit and one or more remote units, wherein the host unit and the one or more remote units are configured to distribute a cooling capacity to each of a plurality of zones, and wherein each of the host unit and the one or more remote units includes an evaporator fan, the method comprising: determining a first zone of the plurality of zones with the highest temperature set point relative to the other of the plurality of zones using the controller;determining, via the controller, whether operating an evaporator fan of a zone of the plurality of zones other than the first zone is capable of cooling the zone of the plurality of zones other than the first zone when the first zone is operated in a COOL state;operating the zone of the plurality of zones other than the first zone in a COOL state when operating the evaporator fan is capable of cooling the zone of the plurality of zones other than the first zone, and operating the zone of the plurality of zones other than the first zone in a NULL state when operating the evaporator fan will not cool the zone of the plurality of zones other than the first zone;setting a first timer for a predetermined amount of time; andwhen the set point of the first zone is satisfied, switching the first zone to the NULL state;setting the first timer after switching the zone of the plurality of zones other than the first zone to the NULL state, and operating the first zone in the COOL state when the set point for the first zone is not reached after the first timer expires, andsetting a second timer for a predetermined amount of time, and if the first zone has not reached the set point on expiration of the second timer, determining, via the controller, whether operating the evaporator fan of the zone of the plurality of zones other than the first zone is capable of cooling the zone of the plurality of zones other than the first zone. 7. The method of claim 6, wherein determining whether operating the evaporator fan of the zone of the plurality of zones other than the first zone is capable of cooling the zone of the plurality of zones other than the first zone is based on a difference between a return air temperature and a discharge air temperature. 8. The method of claim 6, wherein determining whether operating the evaporator fan of the zone of the plurality of zones other than the first zone is capable of cooling the zone of the plurality of zones other than the first zone is based on a suction pressure. 9. The method of claim 6, wherein the predetermined amount of time that the first timer is set for is an estimated amount of time for the first zone to reach its set point. 10. The method of claim 6, wherein the predetermined amount of time that the second timer is set for is an estimated amount of time for the first zone to reach its set point. 11. The method of claim 6, further comprising: wherein when the first timer expires, setting the zones other than the first zone to the COOL state. 12. The method of claim 6, wherein determining whether operating the evaporator fan is capable of cooling the zone of the plurality of zones other than the first zone includes comparing an amount of heat added by operating the evaporator fan with a cooling capacity of the remote unit of the zone of the plurality of zones other than the first zone. 13. The method of claim 6, wherein determining whether operating the evaporator fan is capable of cooling the zone of the plurality of zones other than the first zone includes determining a difference between a return air temperature of the evaporator fan and a discharge temperature of the evaporator fan. 14. The method of claim 13, wherein determining whether operating the evaporator fan is capable of cooling the zone of the plurality of zones other than the first zone further includes comparing the difference between the return air temperature of the evaporator fan and the discharge temperature of the evaporator fan with a predetermined value. 15. The method of claim 6, wherein determining whether operating the evaporator fan is capable of cooling the zone of the plurality of zones other than the first zone includes: determining a suction pressure; anddetermining a saturated temperature based on the suction pressure. 16. The method of claim 15, wherein determining whether operating the evaporator fan is capable of cooling the zone of the plurality of zones other than the first zone further includes: determining a return air temperature of the evaporator fan;determining a value based on the saturated temperature; andcomparing the return air temperature of the evaporator fan to the value.
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이 특허에 인용된 특허 (6)
Marques Marco E. (Joinville SC) Brun Roberto D. (Joinville SC), Fan control system for the evaporator of refrigerating appliances.
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