Cogeneration system

Abstract

A cogeneration system is constructed such that the waste heat recovered from the engine is supplied to the heat pump type air conditioner through the waste heat supplying heat exchanger, thereby maximizing heating capacity and efficiency. A waste heat supplying heat exchanger connecting conduit is formed so as to guide a refrigerant emerging from an indoor unit to enter an outdoor unit through the waste heat supplying heat exchanger, so that the flow path between the waste heat supplying heat exchanger and the heat pump type air conditioner is minimized, thereby reducing installation costs and flow resistance.

1 . A cogeneration system, comprising: 
 a generator;    a drive source which operates to drive the generator, and generates heat;    a waste heat recovery unit which recovers the waste heat of the driving source;    a heat pump type air conditioner which is supplied with electric power from the generator, and includes an indoor unit and outdoor unit;    a waste heat supplying heat exchanger which supplies the heat recovered by the waste heat recovery unit to the heat pump type air conditioner; and    a waste heat supplying heat exchanger connecting conduit adapted to guide a refrigerant emerging from the indoor unit during a heating operation of the heat pump type air conditioner to enter the outdoor unit through the waste heat supplying heat exchanger.    
   
   
       2 . The cogeneration system of  claim 1 , wherein the waste heat supplying connecting conduit comprises an indoor unit connecting conduit which connects the waste heat supplying heat exchanger and the indoor unit and an outdoor unit connecting conduit which connects the waste heat supplying heat exchanger and the outdoor unit.  
   
   
       3 . The cogeneration system of  claim 1 , wherein a first bypass conduit is formed at the waste heat supplying heat exchanger connecting conduit to guide the refrigerant emerging from the outdoor unit during a cooling operation of the heat pump type air conditioner to bypass the waste heat supplying heat exchanger.  
   
   
       4 . The cogeneration system of  claim 3 , wherein a first non-return valve is arranged at the first bypass conduit to prevent reverse flow of the refrigerant emerging from the indoor unit during the heating operation of the heat pump type air conditioner to the first bypass conduit.  
   
   
       5 . The cogeneration system of  claim 1 , wherein an expansion valve is arranged at the waste heat supplying heat exchanger connecting conduit to expand the refrigerant introduced into the waste heat supplying heat exchanger during the heating operation of the heat pump type air conditioner.  
   
   
       6 . The cogeneration system of  claim 5 , wherein a second bypass conduit is formed at the waste heat supplying heat exchanger connecting conduit to bypass the expansion valve according to an outdoor temperature, and 
 a first heating valve is arranged at the second bypass conduit to open and close the second bypass conduit.    
   
   
       7 . The cogeneration system of  claim 1 , wherein a second non-return valve is arranged at the waste heat supplying heat exchanger connecting conduit to prevent reverse flow of the refrigerant emerging from the outdoor heat exchanger during the heating operation of the heat pump type air conditioner to the waste heat supplying heat exchanger.  
   
   
       8 . The cogeneration system of  claim 2 , wherein the outdoor unit has an outdoor heat exchanger connecting conduit for connecting the outdoor unit connecting conduit and the outdoor heat exchanger and a compressor connecting conduit for connecting the outdoor unit connecting conduit and a suction side of the compressor in the outdoor unit.  
   
   
       9 . The cogeneration system of  claim 8 , wherein a second heating valve is arranged at the compressor connecting conduit to open the compressor connecting conduit when the heat pump type air conditioner is in a heating mode and the outdoor temperature is lower than a set temperature.  
   
   
       10 . The cogeneration system of  claim 8 , wherein the outdoor heat exchanger connecting conduit consists of a cooling path adapted to guide the refrigerant passed through the outdoor heat exchanger during a cooling operation of the heat pump type air conditioner to flow therethough, and a heating path adapted to guide the refrigerant passed through the waste heat supplying heat exchanger to enter the outdoor heat exchanger when the heat pump type air conditioner is in a heating mode and the outdoor temperature is higher than a set temperature.  
   
   
       11 . The cogeneration system of  claim 8 , wherein a cooling valve is arranged at the cooling path to open the cooling path during the cooling operation of the heat pump type air conditioner.  
   
   
       12 . The cogeneration system of  claim 8 , wherein an outdoor expansion valve is arranged at the heating path to expand the refrigerant passing through the heating path.  
   
   
       13 . A cogeneration system, comprising: 
 a generator;    a drive source which operates to drive the generator, and generates heat;    a cooling water heat exchanger which recovers heat of cooling water of the driving source;    an exhaust gas heat exchanger which recovers exhaust gas heat discharged from the driving source;    a heat pump type air conditioner which is supplied with electric power from the generator, and includes an indoor unit and outdoor unit;    a waste heat supplying heat exchanger which supplies the heat recovered by at least one of the waste heat recovery unit to at least one of the cooling water heat exchanger and the exhaust gas heat exchanger; and    a waste heat supplying heat exchanger connecting conduit adapted to guide a refrigerant emerging from the indoor unit during a heating operation of the heat pump type air conditioner to enter the outdoor unit through the waste heat supplying heat exchanger.    
   
   
       14 . The cogeneration system of  claim 13 , further comprising a radiating heat exchanger which is installed to radiate the heat recovered from at least one of the cooling water heat exchanger and the exhaust gas heat exchanger.  
   
   
       15 . The cogeneration system of  claim 13 , wherein the waste heat supplying connecting conduit comprises an indoor unit connecting conduit which connects the waste heat supplying heat exchanger and the indoor unit and an outdoor unit connecting conduit which connects the waste heat supplying heat exchanger and the outdoor unit.  
   
   
       16 . The cogeneration system of  claim 15 , wherein the outdoor unit has an outdoor heat exchanger connecting conduit for connecting the outdoor unit connecting conduit and the outdoor heat exchanger and a compressor connecting conduit for connecting the outdoor unit connecting conduit and a suction side of the compressor in the outdoor unit.  
   
   
       17 . The cogeneration system of  claim 16 , wherein the outdoor heat exchanger connecting conduit consists of a cooling path adapted to guide the refrigerant passed through the outdoor heat exchanger during a cooling operation of the heat pump type air conditioner to flow therethough, and a heating path adapted to guide the refrigerant passed through the waste heat supplying heat exchanger to enter the outdoor heat exchanger when the heat pump type air conditioner is in a heating mode and the outdoor temperature is higher than a set temperature.  
   
   
       18 . The cogeneration system of  claim 16 , wherein a first bypass conduit is formed between the outdoor unit connecting conduit and the indoor unit connecting conduit to guide the refrigerant emerging from the outdoor unit during a cooling operation of the heat pump type air conditioner to bypass the waste heat supply heat exchanger.  
   
   
       19 . The cogeneration system of  claim 16 , wherein an expansion valve is arranged at the waste heat supplying heat exchanger connecting conduit to expand the refrigerant introduced into the waste heat supplying heat exchanger during the heating operation of the heat pump type air conditioner.  
   
   
       20 . The cogeneration system of  claim 19 , wherein a second bypass conduit is formed at the indoor unit connecting conduit to bypass the expansion valve according to an outdoor temperature.