US 7,000,423 B2 · Dual economizer heat exchangers for heat pump

Abstract

A refrigerant system is operable in either a heating mode or cooling mode. The system is also provided with an economizer cycle that will function in either heating mode or cooling mode. A pair of economizer heat exchangers are positioned adjacent to an air conditioning economizer expansion device, and a heat pump economizer expansion device, respectively. A control for the system will control the opening either the air conditioning economizer expansion device or the heat pump economizer expansion device, dependent on whether economized operation is desired, and whether the system is in cooling or heating mode. Thus, a pair of heat exchangers are utilized, with one being selected for economizer operation dependent on whether the system is in cooling or heating mode.

Claims5

Dependent claims

A refrigerant cycle comprising:

a compressor;
an outdoor heat exchanger;
a main expansion device;
an indoor heat exchanger;
a valve for selectively providing a refrigerant from said compressor to said outdoor heat exchanger in cooling mode, or to said indoor heat exchanger in a heating mode;
and
a pair of economizer taps, with a first of said economizer taps being positioned between said outdoor heat exchanger and said main expansion device, and a second economizer tap being positioned between said indoor heat exchanger and said main expansion device, and there being economizer expansion devices and valves positioned on each of said first and second taps and with a first and second economizer heat exchanger, with one positioned adjacent to each of said economizer expansion device and valves.

4 more elements

Dependencies are inferred from the claim text.

Dual economizer heat exchangers for heat pump

Life of this patent

Dual economizer heat exchangers for heat pump

Life of this patent

Abstract

Claims5