Refrigeration – Automatic control – Refrigeration producer
Patent
1993-09-28
1995-07-25
Wayner, William E.
Refrigeration
Automatic control
Refrigeration producer
62DIG17, 62DIG2, F25B 4100
Patent
active
054351480
ABSTRACT:
A compression-type refrigeration system is disclosed, in which "flash gas" formation is eliminated without artificially maintaining condenser temperature and pressure levels. Condenser temperatures and pressures are allowed to fluctuate with ambient operating conditions, resulting in reduced compressor load and increased refrigeration capacity. After condensation, liquified refrigerant in the conduit between the receiver and the expansion valve is pressurized without adding heat, by means of a combination of (a) a positive-displacement pump, in parallel with the conduit, (b) a bypass conduit pressure regulating controller, and (c) a check valve in the conduit, to a pressure sufficient to suppress flash gas in the conduit. A variable speed liquid injection pump is provided to inject liquid refrigerant from downstream of the positive-displacement pump to upstream of the condenser, at a controlled rate sufficient to desuperheat the refrigerant upstream of the condenser.
REFERENCES:
patent: 1946328 (1934-02-01), Neff
patent: 2949750 (1960-08-01), Kramer
patent: 3081606 (1963-03-01), Brose et al.
patent: 4136528 (1979-01-01), Vogel et al.
patent: 4599873 (1986-07-01), Hyde
Sandofsky Marc D.
Ward David F.
Blodgett Gerry A.
JDM, Ltd.
Wayner William E.
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