Refrigeration – Automatic control – Selective heating or cooling
Patent
1978-01-25
1979-12-18
King, Lloyd L.
Refrigeration
Automatic control
Selective heating or cooling
62324, F25B 1300
Patent
active
041787684
ABSTRACT:
An internally piloted reversing refrigerant valve for selectively porting fluid from a compressor into an air-conditioning system doubling as heat pump through a five-ported valve of which ports one, two, three and four are employed with air-conditioning system when valve is in a first position, while when the position of valve is changed to a second reversed position, ports one, three, two and five are employed with heat pump system, said valve so constructed that the first and second ports allow fluid to be delivered to a refrigeration system for a return to compressor through ports three and four of a valve housing provided with a slidably movable piston assembly and a pair of operators including valve means incorporated therein so as to allow a complete fluid reversal and refrigerant delivery from compressor to heat pump through the first and third ports for a return to compressor through ports two and five facilitating means for a simple valve to serve two flow patterns through an easy valve shifting operation wherein fluid pressure of internal pilot means incorporated therein performs said position change using high pressure compressor refrigerant which subsequently is exhausted into the low pressure side of the system served by this valve.
REFERENCES:
patent: 2534031 (1950-12-01), Kollsman
patent: 2976701 (1961-03-01), Greenawalt
patent: 2983286 (1961-05-01), Greenawalt et al.
patent: 3032312 (1962-05-01), Greenawalt
patent: 3081790 (1963-03-01), Radford
patent: 3293880 (1966-12-01), Greenawalt
patent: 3400736 (1968-09-01), Bastle et al.
patent: 3411538 (1968-11-01), Gruner et al.
patent: 4055056 (1977-10-01), Perkins
patent: 4112974 (1978-09-01), Davis et al.
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