Patent ID: 8186175

Claim:
An electric energy saving equipment comprising a coolant compressor, a heat pump, a four way valve, a heating/cooling heat exchanger, an expansion valve E 1 , four check valves (V 1 , V 2 , V 3 , V 4 ), an indoor unit of split type air conditioner and pipes (P 1 -P 8 ) for connecting the parts and components, characterized in that a first pipe P 1 connected to the coolant compressor as a coolant outlet pipe, and connected to the heat pump as a coolant inlet pipe; a second pipe P 2 the heat pump as a coolant outlet pipe; a third pipe P 3 connected to the coolant compressor as a coolant inlet pipe; the four way valve is a flow direction diverter valve having four connecting ports D 1 -D 4 of which the first port D 1 is connected to second pipe P 2 of the heat pump; the fourth port D 4 is connected to the third pipe P 3 ; the second port D 2 for shifting the direction of coolant flow is connected to the indoor unit of split type air conditioner through a fourth pipe P 4 and the third port D 3 for shifting the direction of coolant flow is connected to the heating/cooling heat exchanger through a eighth pipe P 8 ; the heating/cooling heat exchanger having functions of condensing and evaporation is connected to the indoor unit of split type air conditioner through a fifth pipe P 5 and a seventh pipe P 7 mutually connected in parallel; the fifth pipe P 5 has a first check valve V 1 and a second check valve V 2 which are arranged to have their flow direction opposite to each other; the seventh pipe P 7 has a third check valve V 3 and a fourth check valve V 4 which, in addition to having their flow direction arranged opposite to each other, also have the third check valve V 3 on the seventh pipe P 7 arranged in the same flow direction as the second check valve V 2 on the fifth pipe P 5 and have the fourth check valve V 4 on the seventh pipe P 7 arranged in the same flow direction as the first valve V 1 on the fifth pipe P 5 ; a sixth pipe P 6 has an expansion valve E 1 , which one end is in parallel connected to the fifth pipe P 5 at the point between the first check valve V 1 and the second check valve V 2 on the fifth pipe P 5 , and the other end is in parallel connected to the seventh pipe P 7 at the point between the third check valve v 3 and the fourth check valve V 4 on the seventh pipe P 7 .