Patent ID: 6865904

Claim:
In a cooling and heating system including a compressor for compressing refrigerant to a high temperature and pressure state, an indoor unit installed in the indoor for cooling an indoor air by heat-exchanging a low temperature expanded refrigerant with an indoor air in the cooling mode and for heating an indoor air by heat exchanging a high temperature and pressure refrigerant with an indoor air in the heating mode, an outdoor unit installed in the outdoor for discharging heat into the air by heat-exchanging a high temperature and pressure refrigerant with an external air in the cooling mode and for heating a refrigerant by heat-exchanging the expanded refrigerant with an external air in the heating mode, and a heat exchange unit for heat-exchanging a high temperature refrigerant from the indoor unit with a low temperature refrigerant from the outdoor unit in the heating mode, a combined regeneration cooling and heating system that is characterized in that a heat exchanger capable of heat-exchanging a high temperature refrigerant from the indoor unit with a refrigerant inputted into the outdoor unit, and an expansion unit adapted to receive a refrigerant of the heat exchanger and to expand for cooling the refrigerant are installed in the interior of the heat exchange unit; and a high temperature refrigerant from the indoor unit and a low temperature refrigerant from the outdoor unit are inputted into the heat exchange unit in the heating mode; and the high temperature refrigerant flows through the heat exchanger and the expansion unit and is heat-exchanged with the low temperature refrigerant.