CO2 REFRIGERANT SYSTEM WITH BOOSTER CIRCUIT
First Claim
1. A refrigerant system comprising:
- a main closed-loop refrigerant circuit including a compressor for compressing refrigerant and delivering it downstream to a heat rejection heat exchanger, refrigerant from said heat rejection heat exchanger passing through an expansion device, then through an evaporator and returning to said compressor; and
a booster closed-loop refrigerant circuit, said booster circuit including a compressor, a first heat exchanger to reject heat from said booster circuit, an expansion device and a heat accepting heat exchanger, and refrigerant in said booster circuit cooling refrigerant in said main circuit in said heat accepting heat exchanger, said main circuit being charged with CO2 refrigerant.
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Accused Products
Abstract
A refrigerant system, which utilizes CO2 as a refrigerant, includes a main closed-loop refrigerant circuit and a booster closed-loop refrigerant circuit. A heat accepting heat exchanger, which provides extra cooling for the refrigerant circulating through the main circuit, and thus improves refrigerant system performance, also serves as a shared component coupling the two circuits through heat transfer interaction. Various schematics and configurations for the booster circuit, which may be combined with other performance enhancement features, are disclosed. Additional benefits for economizer function, “liquid-to-suction” heat exchanger, intercooling and liquid injection are also presented. The booster circuit may also contain CO2 refrigerant.
43 Citations
20 Claims
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1. A refrigerant system comprising:
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a main closed-loop refrigerant circuit including a compressor for compressing refrigerant and delivering it downstream to a heat rejection heat exchanger, refrigerant from said heat rejection heat exchanger passing through an expansion device, then through an evaporator and returning to said compressor; and a booster closed-loop refrigerant circuit, said booster circuit including a compressor, a first heat exchanger to reject heat from said booster circuit, an expansion device and a heat accepting heat exchanger, and refrigerant in said booster circuit cooling refrigerant in said main circuit in said heat accepting heat exchanger, said main circuit being charged with CO2 refrigerant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification