Refrigeration – Automatic control – Withdrawing or adding refrigerant from or to normally closed...
Patent
1985-06-25
1986-07-22
Tanner, Harry
Refrigeration
Automatic control
Withdrawing or adding refrigerant from or to normally closed...
62126, 62292, 137410, 137558, F25B 4500, F16K 3118
Patent
active
046011773
ABSTRACT:
In an air cooling system including a compressor, a condenser, a liquid tank, an expansion valve and an evaporator which are connected through conduits to form a closed circuit refrigeration system, there is provided a refrigerant over-charging checking system for preventing the system from being overcharged with the refrigerant. The checking system comprises a service valve mounted in a conduit of the system and having therein a refrigerant inlet passage for flowing the refrigerant into the closed refrigeration system, a check mechanism associated with the service valve to block the refrigerant inlet passage when electrically energized, and a liquid level sensor associated with the liquid tank to electrically energize the check mechanism when a refrigerant level in the liquid tank rises to a predetermined level.
REFERENCES:
patent: 2165569 (1939-07-01), Obermaier
patent: 3391547 (1968-07-01), Kingston
patent: 3813893 (1974-06-01), Gemender et al.
patent: 4483367 (1984-11-01), Ross, Jr. et al.
patent: 4553400 (1985-11-01), Branz
Tada Eiji
Takano Tsutomu
Tanino Mikio
Nissan Motor Co,. Ltd.
Tanner Harry
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