Abstract: The object of this invention is to provide a heating apparatus with low compression load. This heating apparatus consists of an expansion unit for adiabatically expanding refrigerant, an indoor unit having a heat exchanger, a compressor for adiabatically compressing the refrigerant, and an outdoor unit having a heat exchanger, and sequentially circulates refrigerant through the compressor, indoor unit, expansion unit, and outdoor unit to heat a target area using the phase change of the refrigerant. In an embodiment, the apparatus (100) is designed such that the refrigerant from the indoor unit (140) passes through a heat exchanging and evaporating unit (110) prior to flowing into the expansion unit (120), with the refrigerant from the evaporating unit (110) partially flowing into a sub-expansion unit (130) to become low temperature, low pressure bypassed refrigerant. The bypassed refrigerant from the sub-expansion unit (130) passes through the evaporating unit (110) prior to flowing into the compressor (150).

Abstract: The object of this invention is to provide an air conditioning system with low compression load. This air conditioning system consists of an expansion unit for adiabatically expanding refrigerant, an indoor unit having a heat exchanger, a compressor for adiabatically compressing the refrigerant, and an outdoor unit having a heat exchanger, and circulates refrigerant through the compressor, outdoor unit, expansion unit, and indoor unit to heat or cool a target area using the phase change of the refrigerant.

Abstract: The object of this invention is to provide a cooling apparatus with low compression load. This cooling apparatus consists of an expansion unit for adiabatically expanding refrigerant, an indoor unit having a heat exchanger, a compressor for adiabatically compressing the refrigerant, and an outdoor unit having a heat exchanger, and sequentially circulates refrigerant through the compressor, outdoor unit, expansion unit, and indoor unit to cool a target area using the phase change of the refrigerant. In an embodiment, the apparatus (100) is designed such that the refrigerant from the outdoor unit (160) passes through a heat exchanging and evaporating unit (110) prior to flowing into the expansion unit (120), with the refrigerant from the evaporating unit (110) partially flowing into a sub-expansion unit (130) to become low temperature, low pressure bypassed refrigerant.