Transport refrigeration system with improved temperature and humidity control
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25B-013/00
출원번호
US-0304686
(1989-01-03)
발명자
/ 주소
Berge Jeffrey B. (Bloomington MN) Seshadri Jayaram (Minneapolis MN) Hanson Jay L. (Bloomington MN)
출원인 / 주소
Thermo King Corporation (Minneapolis MN 02)
인용정보
피인용 횟수 :
18인용 특허 :
9
초록▼
A transport refrigeration system operable in cooling and heating cycles to maintain the temperature of a fresh load in a conditioned space extremely close to a predetermined set point temperature, with the cooling cycle primarily controlling the load temperature in ambients above freezing. The trans
A transport refrigeration system operable in cooling and heating cycles to maintain the temperature of a fresh load in a conditioned space extremely close to a predetermined set point temperature, with the cooling cycle primarily controlling the load temperature in ambients above freezing. The transport refrigeration system includes a compressor driven by a prime mover in one of two selectable speeds, an air delivery system which provides a substantially constant volume of conditioned air for a conditioned load space regardless of prime mover speed, a modulation valve in a suction line of the compressor, and a digital thermostat which senses the temperature of air returning to an evaporator. The digital thermostat controls the modulation valve via modulation control in a predetermined temperature range above and below set point, in both the heating and cooling cycles.
대표청구항▼
In a transport refrigeration system having a refrigeration circuit including a compressor having discharge and suction ports, a condenser, an evaporator, a liquid line between the condenser and evaporator, expansion means in the liquid line, a suction line between the evaporator and suction port of
In a transport refrigeration system having a refrigeration circuit including a compressor having discharge and suction ports, a condenser, an evaporator, a liquid line between the condenser and evaporator, expansion means in the liquid line, a suction line between the evaporator and suction port of the compressor, a hot gas line, and valve means disposed to selectively connect the hot gas line from the discharge port of the compressor to either the condenser or the evaporator to initiate cooling and hot gas heating cycles, respectively, and further including air delivery means for the evaporator which draws air from a served space for conditioning by the evaporator, and for returning the conditioned air to the served space, and a prime mover for the compressor, the improvement comprising: a thermostat having a temperature sensor disposed to sense the temperature of the air returning to the evaporator from the served space, said thermostat providing a digital signal responsive to the difference between the sensed temperature of the air and a desired set point temperature, a modulation valve in the suction line, and modulation control responsive to the digital signal provided by said thermostat for continuously controlling said modulation valve in a predetermined temperature range above and below the desired set point temperature, during both cooling and hot gas heating cycles, whereby the temperature of the served space when containing a load of fresh produce may be maintained close to set point primarily by the cooling cycle, with minimal temperature drop across the evaporator, minimizing moisture removal from the conditioned air and maintaining a high relative humidity in the served space, and the set point may be set close to freezing without danger of damaging the load.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (9)
Lowes Albert R. (Auburn CA), Constant temperature maintaining refrigeration system using proportional flow throttling valve and controlled bypass loo.
Naley Lowell B. (Minnetonka MN) Haberkorn Robert W. (Edina MN) Leinum Virgil D. (Minneapolis MN), Electronic capacity control or direct expansion refrigeration of air conditioning systems.
Gras Horst (Neuffen DEX) Blaich Herbert (Fellbach DEX), Regulating mechanism for the refrigerant flow to the evaporator or refrigerating systems or heat pumps and expansion val.
Schumacher, Ryan Wayne; Nelson, Matthew S.; McMonigal, Kyle, Method and system for feedback-based load control of a climate control system in transport.
Hoium Stanley O. ; Freund Peter W., Temperature control system and method for efficiently obtaining and maintaining the temperature in a conditioned space.
Taras, Michael F.; Lewis, Russell G.; Awwad, Nader S.; Ferguson, Benjamin E.; Steele, John T., Transport refrigeration system powered by diesel engine with pressurized combustion air.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.