Heat exchanger unit and air conditioning system

Abstract

This disclosure provides a heat exchanger unit and an air conditioning system. The heat exchanger unit includes: a first heat exchanger, included in a first housing provided with a first refrigerant inlet and a first refrigerant outlet, and a first heat exchanging tube bundle disposed in the first housing; a second heat exchanger, included in a second housing provided with a second refrigerant inlet and a second refrigerant outlet, and a third heat exchanging tube bundle disposed in the second housing and having an inlet in communication with an outlet of the first heat exchanging tube bundle; a third heat exchanger, and a first heat exchanging flow passage; and a fourth heat exchanger, and a second heat exchanging flow passage and having an inlet in communication with an outlet of the first heat exchanging flow passage.

1 . A heat exchanger unit, comprising:
 a first heat exchanger including a first housing provided with a first refrigerant inlet and a first refrigerant outlet, a first refrigerant flow passage formed between the first refrigerant inlet and the first refrigerant outlet, and a first heat exchanging tube bundle disposed in the first housing;   a second heat exchanger including a second housing provided with a second refrigerant inlet and a second refrigerant outlet, a second refrigerant flow passage formed between the second refrigerant inlet and the second refrigerant outlet, and a third heat exchanging tube bundle disposed in the second housing and having an inlet in communication with an outlet of the first heat exchanging tube bundle;   a third heat exchanger including a third refrigerant flow passage in communication with the first refrigerant flow passage, and a first heat exchanging flow passage disposed corresponding to the third refrigerant flow passage; and   a fourth heat exchanger including a fourth refrigerant flow passage in communication with the second refrigerant flow passage, and a second heat exchanging flow passage disposed corresponding to the fourth refrigerant flow passage and having an inlet in communication with an outlet of the first heat exchanging flow passage.   
     
     
         2 . The heat exchanger unit according to  claim 1 , wherein
 the third heat exchanger is disposed in the first housing, the first heat exchanging flow passage is a second heat exchanging tube bundle disposed in the first housing, the second heat exchanging tube bundle is disposed closer to the first refrigerant outlet than the first heat exchanging tube bundle, and the third refrigerant flow passage and the first refrigerant flow passage together form an empty space inside the first housing, and   the fourth heat exchanger is disposed in the second housing, the second heat exchanging flow passage is a fourth heat exchanging tube bundle disposed in the second housing, the fourth heat exchanging tube bundle is disposed closer to the second refrigerant outlet than the third heat exchanging tube bundle, and the fourth refrigerant flow passage and the second refrigerant flow passage together form an empty space inside the second housing.   
     
     
         3 . The heat exchanger unit according to  claim 2 , wherein
 the first heat exchanger further includes   first housing tube sheets respectively disposed at two inner ends of the first housing and fixing the first heat exchanging tube bundle and the second heat exchanging tube bundle,   first heat exchanger end covers respectively disposed at two ends of the first housing,   first chambers enclosed by the first heat exchanger end covers and the first housing tube sheets disposed corresponding to the first heat exchanger end covers, and   at least one first separator disposed in the first chamber and dividing the first chamber into a first heat exchanging tube bundle chamber in communication with the first heat exchanging tube bundle and a second heat exchanging tube bundle chamber in communication with the second heat exchanging tube bundle.   
     
     
         4 . The heat exchanger unit according to  claim 3 , wherein
 the second heat exchanger further includes   second housing tube sheets respectively disposed at two inner ends of the second housing and fixing the third heat exchanging tube bundle and the fourth heat exchanging tube bundle,   second heat exchanger end covers respectively disposed at two ends of the second housing,   second chambers enclosed by the second heat exchanger end covers and the second housing tube sheets disposed corresponding to the second heat exchanger end covers, and   at least one second separator disposed in the second chamber and dividing the second chamber into a first accommodating chamber in communication with the third heat exchanging tube bundle and a second accommodating chamber in communication with the fourth heat exchanging tube bundle.   
     
     
         5 . The heat exchanger unit according to  claim 4 , wherein
 the second heat exchanger further includes   two, third separators disposed in the second chamber and dividing the second chamber into a third accommodating chamber in communication with the third heat exchanging tube bundle, a fourth accommodating chamber in communication with the fourth heat exchanging tube bundle, and a fifth accommodating chamber between the third accommodating chamber and the fourth accommodating chamber.   
     
     
         6 . The heat exchanger unit according to  claim 5 , wherein
 the fourth accommodating chamber is in communication with the first heat exchanging tube bundle chamber through a pipeline,   the first heat exchanging tube bundle chamber is in communication with the fifth accommodating chamber through a pipeline, and   the fifth accommodating chamber is in communication with the third accommodating chamber through the third heat exchanging tube bundle.   
     
     
         7 . The heat exchanger unit according to  claim 6 , wherein
 the pipeline through which the fourth accommodating chamber is in communication with the first heat exchanging tube bundle chamber is provided with a first water pump.   
     
     
         8 . The heat exchanger unit according to  claim 5 , wherein
 the second heat exchanging tube bundle chamber is in communication with the fifth accommodating chamber through a pipeline,   the fourth heat exchanging tube bundle is in communication with the first heat exchanging tube bundle chamber through a pipeline,   the first heat exchanging tube bundle chamber is in communication with the fifth accommodating chamber through a pipeline, and   the fifth accommodating chamber is in communication with the third accommodating chamber through the third heat exchanging tube bundle.   
     
     
         9 . The heat exchanger unit according to  claim 8 , wherein
 the pipeline through which the fourth heat exchanging tube bundle is in communication with the first heat exchanging tube bundle chamber is provided with a second water pump.   
     
     
         10 . The heat exchanger unit according to  claim 1 , wherein each of the first heat exchanger and the second heat exchanger is a condenser. 
     
     
         11 . The heat exchanger unit according to  claim 2 , wherein
 an outlet of the fourth heat exchanging tube bundle is in communication with the inlet of the third heat exchanging tube bundle through a pipeline.   
     
     
         12 . The heat exchanger unit according to  claim 11 , wherein
 the pipeline through which the outlet of the fourth heat exchanging tube bundle is in communication with the inlet of the third heat exchanging tube bundle is provided with a third water pump.   
     
     
         13 . The heat exchanger unit according to  claim 1 , wherein
 the third heat exchanger is disposed outside the first housing, and an inlet of the third refrigerant flow passage is in communication with the first refrigerant outlet, and   the fourth heat exchanger is disposed outside the second housing, and an inlet of the fourth refrigerant flow passage is in communication with the second refrigerant outlet.   
     
     
         14 . The heat exchanger unit according to  claim 13 , wherein
 a pipeline through which the first heat exchanging flow passage is in communication with the second heat exchanging flow passage is provided with a fourth water pump.   
     
     
         15 . The heat exchanger unit according to  claim 13 , wherein
 an outlet of the second heat exchanging flow passage is in communication with the inlet of the third heat exchanging tube bundle through a pipeline.   
     
     
         16 . The heat exchanger unit according to  claim 15 , wherein
 the pipeline through which the outlet of the second heat exchanging flow passage is in communication with the inlet of the third heat exchanging tube bundle is provided with a fifth water pump.   
     
     
         17 . An air conditioning system, comprising:
 the heat exchanger unit according to  claim 1  as a condenser.