Cooling structure for inverter housing

Abstract

In a cabinet, an inverter housing is mounted on an inverter housing mounting surface. Heat-exchanger-side pipe connection ports are disposed so as to extend through the inverter housing mounting surface toward a heat exchanger for use as an air-cooling device. Further, controller-mounting-side pipe connection ports are disposed so as to extend on a controller mounting side. A refrigerant supply line is a refrigerant passage through which a refrigerant is cyclically fed from the refrigerant cooling device. One end of the refrigerant supply line is connected to the heat-exchanger-side pipe connection ports or the controller-mounting-side pipe connection ports, while the other end is connected to the refrigerant cooling device that penetrates an appropriate part of a wall of the cabinet and is situated in a proper position outside the cabinet.

1 . A piping structure which is disposed on a cabinet and serves to circulate a refrigerant used to cool a heat sink of an inverter, the piping structure comprising:
 pipe connection ports disposed individually so as to extend on a controller mounting side of the cabinet and on a heat exchanger side opposite the controller mounting side; and   a pipe for the refrigerant, selectively connected to either the pipe connection port disposed on the controller mounting side or the pipe connection port disposed on the heat exchanger side.   
   
   
       2 . The piping structure according to  claim 1 , wherein the pipe connection port disposed on the controller mounting side and the pipe connection port disposed on the heat exchanger side are formed on the heat sink itself. 
   
   
       3 . The piping structure according to  claim 2 , wherein a passage branching point from which the pipe connection port disposed on the controller mounting side and the pipe connection port disposed on the heat exchanger side diverge is formed inside the heat sink. 
   
   
       4 . The piping structure according to  claim 1 , wherein the pipe connection port disposed on the controller mounting side and the pipe connection ports disposed on the heat exchanger side are provided on a pipe connection port setting part independent of the heat sink, and the pipe connection port setting part has a pipe connection port connected to the heat sink and is connected to the heat sink. 
   
   
       5 . The piping structure according to  claim 4 , wherein a passage branching point from which the pipe connection ports disposed on the controller mounting side and the pipe connection port disposed on the heat exchanger side diverge is formed inside the pipe connection port setting part. 
   
   
       6 . A structure of a cabinet in which a piping structure for circulating a refrigerant used to cool a heat sink of an inverter is disposed, the piping structure comprising:
 pipe connection ports disposed individually so as to extend on a controller mounting side of the cabinet and a heat exchanger side opposite the controller mounting side; and   a pipe for the refrigerant, selectively connected to either the pipe connection port disposed on the controller mounting side or the pipe connection port disposed on the heat exchanger side,   the cabinet having an inverter housing mounting surface provided with a panel cut which allows the pipe disposed on the heat exchanger side to be connected from the controller mounting side, the panel cut being configured to be closed after the pipe connection.