Refrigeration – Automatic control – Refrigeration producer
Patent
1996-07-29
1998-01-06
Wayner, William E.
Refrigeration
Automatic control
Refrigeration producer
62197, 237 2B, G05D 2300, F25B 4104
Patent
active
057042195
ABSTRACT:
In an air conditioning apparatus employing a heat pump system in which a cooling evaporator and a heating condenser are disposed inside the compartment. A compressor is provided with a gas injection port, a fixed throttle for reducing pressure of refrigerant on high pressure side in a refrigerating cycle to middle pressure, and a gas-liquid separator for separating the middle pressure refrigerant of which pressure is reduced by the fixed throttle. The gaseous refrigerant separated by the gas-liquid separator is introduced into the gas injection port. In a heating operation, the refrigerant circulates through the compressor, the condenser, the fixed throttle, the gas-liquid separator, an expansion valve, an outdoor heat exchanger, and the compressor as a closed circuit, while the gaseous refrigerant separated by the gas-liquid separator is injected into the compressor through the gas injection port. As a result, when the outside air temperature is low, the heating capacity is improved.
REFERENCES:
patent: 5056329 (1991-10-01), Wilkinson
patent: 5370307 (1994-12-01), Uehra
patent: 5477700 (1995-12-01), Iio
Inagaki Mitsuo
Nagata Toshihiro
Onimaru Sadahisa
Ozaki Yukikatu
Suzuki Takahisa
Nippon Soken Inc.
Nippondenso Co. Ltd.
Wayner William E.
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