Patent ID: 7802441
Filing Date: 2010-09-28
Classification: F24D,F25B,Y02B

Abstract:
1. A heat pump system in heating mode comprising: an accumulator; an outdoor heat exchanger outputting a refrigerant to the accumulator; an indoor condenser outputting refrigerant to the outdoor heat exchanger; an indoor heat exchanger outputting all of the refrigerant entering the indoor heat exchanger to the accumulator; an oil separator outputting an oil to the accumulator; the accumulator outputting the oil and the refrigerant to a primary compressor; the outdoor heat exchanger outputting refrigerant to the accumulator via a first refrigerant path; the indoor condenser outputting refrigerant to the outdoor heat exchanger via a second refrigerant path; the indoor heat exchanger outputting refrigerant to the accumulator via a third refrigerant path; the accumulator outputting the oil and the refrigerant to the primary compressor via a fourth refrigerant path; a first boost compressor outputting the refrigerant to the indoor heat exchanger via a fifth refrigerant path, and the outdoor heat exchanger outputting refrigerant to the first boost compressor through a sixth refrigerant path, wherein the first through sixth refrigerant paths are distinct and non-overlapping.