Air conditioning system and ventilation apparatus

Abstract

An air conditioning system includes a first compressor; a first heat exchanger provided outside to perform heat exchange with outside air; a second heat exchanger provided in a first path through which the outside air is supplied inside; a first refrigerant circuit in which a first refrigerant flows, including the first compressor, the first heat exchanger, and the second heat exchanger being connected by a first refrigerant pipe; a second compressor; a third heat exchanger provided inside to perform heat exchange with inside air; a fourth heat exchanger provided in a second path through which the inside air is exhausted outside; a second refrigerant circuit in which a second refrigerant flows, including the second compressor, the third heat exchanger, and the fourth heat exchanger being connected by a second refrigerant pipe; and a first intermediate heat exchanger for performing heat exchange between the first refrigerant and the second refrigerant.

1 . An air conditioning system comprising:
 a first compressor;   a first heat exchanger provided outside a building and configured to perform heat exchange with outside air outside the building;   a second heat exchanger provided in a first path through which the outside air is supplied inside the building;   a first refrigerant circuit in which a first refrigerant flows, the first refrigerant circuit including the first compressor, the first heat exchanger, and the second heat exchanger being connected by a first refrigerant pipe;   a second compressor;   a third heat exchanger provided inside the building and configured to perform heat exchange with inside air inside the building;   a fourth heat exchanger provided in a second path through which the inside air is exhausted outside the building;   a second refrigerant circuit in which a second refrigerant flows, the second refrigerant circuit including the second compressor, the third heat exchanger, and the fourth heat exchanger being connected by a second refrigerant pipe; and   a first intermediate heat exchanger configured to perform heat exchange between the first refrigerant and the second refrigerant.   
     
     
         2 . The air conditioning system according to  claim 1 , wherein
 the first refrigerant flows from the first compressor to the first heat exchanger, then to the first intermediate heat exchanger, then to the second heat exchanger, and then returns to the first compressor, and   the second refrigerant flows from the second compressor to the first intermediate heat exchanger, then to the fourth heat exchanger, then to the third heat exchanger, and then returns to the second compressor; or   the first refrigerant flows from the first compressor to the second heat exchanger, then to the first intermediate heat exchanger, then to the first heat exchanger, and then returns to the first compressor, and   the second refrigerant flows from the second compressor to the third heat exchanger, then to the fourth heat exchanger, then to the first intermediate heat exchanger, and then returns to the second compressor.   
     
     
         3 . The air conditioning system according to  claim 1 , further comprising:
 a first expansion valve provided between the first heat exchanger and the first intermediate heat exchanger in the first refrigerant circuit; and   a second expansion valve provided between the third heat exchanger and the fourth heat exchanger in the second refrigerant circuit.   
     
     
         4 . The air conditioning system according to  claim 1 , further comprising:
 a sixth heat exchanger provided in the first path and connected in parallel with the third heat exchanger in the second refrigerant circuit.   
     
     
         5 . A ventilation apparatus comprising:
 a first heat exchanger provided outside a building and configured to perform heat exchange with outside air outside the building;   a second heat exchanger provided in a first path through which the outside air is supplied inside the building;   a fourth heat exchanger provided in a second path through which inside air inside the building is exhausted outside the building;   a first refrigeration cycle including the first heat exchanger;   a second refrigeration cycle including the second heat exchanger; and   an intermediate heat exchanger configured to perform heat exchange between a refrigerant in the first refrigeration cycle and a refrigerant in the second refrigeration cycle, wherein   the ventilation apparatus adjusts a heat balance between the second heat exchanger and the fourth heat exchanger by an amount of heat in the first heat exchanger.   
     
     
         6 . A ventilation apparatus comprising:
 a third compressor;   a first heat exchanger provided outside a building and configured to perform heat exchange with outside air outside the building;   a third refrigerant circuit in which a third refrigerant flows, the third refrigerant circuit including the third compressor and the first heat exchanger being connected by a third refrigerant pipe;   a fourth compressor;   a second heat exchanger provided in a first path through which the outside air is supplied inside the building;   a fourth heat exchanger provided in a second path through which inside air inside the building is exhausted outside the building;   a fourth refrigerant circuit in which a fourth refrigerant flows, the fourth refrigerant circuit including the fourth compressor, the second heat exchanger, and the fourth heat exchanger being connected by a fourth refrigerant pipe; and   a second intermediate heat exchanger configured to perform heat exchange between the third refrigerant and the fourth refrigerant.   
     
     
         7 . A ventilation apparatus comprising:
 a fifth compressor;   a first heat exchanger provided outside a building and configured to perform heat exchange with outside air outside the building;   a fourth heat exchanger provided in a second path through which inside air inside the building is exhausted outside the building;   a fifth refrigerant circuit in which a fifth refrigerant flows, the fifth refrigerant circuit including the fifth compressor, the first heat exchanger, and the fourth heat exchanger being connected by a fifth refrigerant pipe;   a sixth compressor;   a second heat exchanger provided in a first path through which the outside air is supplied inside the building;   a sixth refrigerant circuit in which a sixth refrigerant flows, the sixth refrigerant circuit including the sixth compressor and the second heat exchanger being connected by a sixth refrigerant pipe; and   a third intermediate heat exchanger configured to perform heat exchange between the fifth refrigerant and the sixth refrigerant.   
     
     
         8 . An air conditioning system comprising:
 a seventh compressor;   a first heat exchanger provided outside a building and configured to perform heat exchange with outside air outside the building;   a third heat exchanger provided inside the building and configured to perform heat exchange with inside air inside the building;   a seventh refrigerant circuit in which a seventh refrigerant flows, the seventh refrigerant circuit including the seventh compressor, the first heat exchanger, and the third heat exchanger being connected by a seventh refrigerant pipe;   an eighth compressor;   a second heat exchanger provided in a first path through which the outside air is supplied inside the building;   a fourth heat exchanger provided in a second path through which the inside air is exhausted outside the building;   an eighth refrigerant circuit in which an eighth refrigerant flows, the eighth refrigerant circuit including the eighth compressor, the second heat exchanger, and the fourth heat exchanger being connected by an eighth refrigerant pipe; and   a fourth intermediate heat exchanger configured to perform heat exchange between the seventh refrigerant and the eighth refrigerant.