Refrigeration system with de-superheating bypass
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IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25B-005/00
출원번호
US-0253000
(2002-09-23)
발명자
/ 주소
Bai, Cheolho
출원인 / 주소
VAI Holdings LLC
대리인 / 주소
Ostrolenk, Faber, Gerb & Soffen, LC
인용정보
피인용 횟수 :
28인용 특허 :
10
초록▼
A refrigeration system includes a compressor, a condenser, an expansion device and an evaporator connected in a closed circuit through which a refrigerant is circulated. A portion of liquid refrigerant exiting the condenser is diverted through a secondary expansion valve and a heat exchanger, which
A refrigeration system includes a compressor, a condenser, an expansion device and an evaporator connected in a closed circuit through which a refrigerant is circulated. A portion of liquid refrigerant exiting the condenser is diverted through a secondary expansion valve and a heat exchanger, which is thermally coupled between compressor and condenser, thereby allowing the superheated refrigerant vapor to be cooled at a temperature at or close to its saturation temperature when it enters the condenser. Hence, a de-superheating process inside the condenser is eliminated, and the condenser operates more efficiently, resulting in increased subcooling and thus increased cooling capacity. Also, the more efficient condenser decreases condenser pressure, a phenomenon which results in the reduction of the compressor work and accordingly increases the efficiency. The refrigerant vapor from the bypass line is maintained at an intermediate pressure between evaporator and condenser pressures and is combined with the low-pressure vapor from the evaporator through a pressure differential accommodating device, which may generate a vacuum by vortex flow of the superheated vapor from the bypass line, by flow of the superheated vapor through the throat of a venturi device, or in any other comparable manner. By increasing the amount of diverted refrigerant beyond that required for de-superheating, reduced cooling capacity can be achieved without the need for frequent on-off cycling of the compressor. The refrigeration system may employ a single refrigerant or a mixture of refrigerants such as R-134a, R-32 and R-125.
대표청구항▼
A refrigeration system includes a compressor, a condenser, an expansion device and an evaporator connected in a closed circuit through which a refrigerant is circulated. A portion of liquid refrigerant exiting the condenser is diverted through a secondary expansion valve and a heat exchanger, which
A refrigeration system includes a compressor, a condenser, an expansion device and an evaporator connected in a closed circuit through which a refrigerant is circulated. A portion of liquid refrigerant exiting the condenser is diverted through a secondary expansion valve and a heat exchanger, which is thermally coupled between compressor and condenser, thereby allowing the superheated refrigerant vapor to be cooled at a temperature at or close to its saturation temperature when it enters the condenser. Hence, a de-superheating process inside the condenser is eliminated, and the condenser operates more efficiently, resulting in increased subcooling and thus increased cooling capacity. Also, the more efficient condenser decreases condenser pressure, a phenomenon which results in the reduction of the compressor work and accordingly increases the efficiency. The refrigerant vapor from the bypass line is maintained at an intermediate pressure between evaporator and condenser pressures and is combined with the low-pressure vapor from the evaporator through a pressure differential accommodating device, which may generate a vacuum by vortex flow of the superheated vapor from the bypass line, by flow of the superheated vapor through the throat of a venturi device, or in any other comparable manner. By increasing the amount of diverted refrigerant beyond that required for de-superheating, reduced cooling capacity can be achieved without the need for frequent on-off cycling of the compressor. The refrigeration system may employ a single refrigerant or a mixture of refrigerants such as R-134a, R-32 and R-125. des a state machine responsive to (i) an arm command for transitioning from a standby state to an armed state, (ii) a final trigger event for transitioning from the armed state to a triggered state, and (iii) a post trigger count event for transitioning from the triggered state to the standby state. A controller provides the arm command and issues appropriate configuration controls to collect signal samples. In particular, a network responds to these commands from the controller to selectively provide signal samples from a device under test. A trigger event generator responds to logic or other characteristics of the signal samples to provide trigger events. These trigger events are counted by a trigger event counter in the armed state of the state machine to identify the final trigger event corresponding to an occurrence of a programmable number of the trigger events. A store event generator also responds to a programmed characteristic or combination(s) of the signal samples to provide a store event. Either or both of the event generators may use a mask to provide these events. A post trigger sample counter operates in the triggered state to provide the post trigger count event in response to a programmable number of signal samples being captured. A memory operates in the triggered state to store the samples being captured. The memory may optionally store samples in the armed state which occur prior to the targeted samples so as to provide test data from cycles prior to the targeted events.
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이 특허에 인용된 특허 (10)
Narreau Peter P. (Pennellville NY), Economizer control with variable capacity.
Schutte, Daniel J.; Raven, Matthew; Dolcich, Benedict J.; Lin, Zhiyong, Cooling system having a condenser with a micro-channel cooling coil and sub-cooler having a fin-and-tube heat cooling coil.
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