초록 ▼

An expansion device in a refrigeration chiller defines at least two fixed orifices and employs at least two positionable valve members in order to minimize the overall flow area through the expansion device under a first set of chiller operating conditions, to maximize the overall flow area through

An expansion device in a refrigeration chiller defines at least two fixed orifices and employs at least two positionable valve members in order to minimize the overall flow area through the expansion device under a first set of chiller operating conditions, to maximize the overall flow area through the expansion device under a second set of chiller operating conditions and to define a flow area intermediate said minimum and said maximum flow areas when a third set of chiller operating conditions exist.

대표청구항 ▼

[ What is claimed is:] [1.]1. A refrigeration chiller comprising:an evaporator;a compressor, said compressor drawing refrigerant gas from said evaporator;a condenser, said condenser receiving compressed refrigerant gas from said compressor; andan expansion device, said expansion device receiving liq

[ What is claimed is:] [1.]1. A refrigeration chiller comprising:an evaporator;a compressor, said compressor drawing refrigerant gas from said evaporator;a condenser, said condenser receiving compressed refrigerant gas from said compressor; andan expansion device, said expansion device receiving liquid refrigerant from said condenser, defining a first and a second orifice and having a first and a second valve member, each of said first and said second orifices being of a predetermined, fixed size, flow through said first and said second orifices being in parallel, said first valve member being positionable in a first and a second position with respect to said first orifice and said second valve member being positionable in a first position and a second position with respect to said second orifice, the positioning of said valve members with respect to the orifice with which they are associated cooperatively determining the total flow area through said expansion device.