Exhaust heat recovery device

Abstract

An exhaust heat recovery device includes an evaporator disposed to evaporate a working fluid by exchanging heat between a heating fluid and the working fluid, a condenser disposed to cool and condense the working fluid by exchanging heat between a fluid to be heated and the working fluid evaporated by the evaporator, an evaporation side connection portion for guiding the working fluid evaporated by the evaporator to the condenser, and a condensation side connection portion for guiding the working fluid condensed by the condenser to the evaporator. Furthermore, at least one of the evaporation side connection portion and the condensation side connection portion has a curved portion.

1 . An exhaust heat recovery device having a working fluid sealed therein and capable of being evaporated and condensed by exchanging heat, the exhaust heat recovery device comprising:
 an evaporator disposed in a first passage through which a heating fluid flows, the evaporator being adapted to evaporate the working fluid by exchanging heat between the heating fluid and the working fluid;   a condenser disposed in a second passage through which a fluid to be heated flows, the condenser being adapted to cool and condense the working fluid by exchanging heat between the fluid to be heated and the working fluid evaporated by the evaporator;   an evaporation side connection portion for guiding the working fluid evaporated by the evaporator to the condenser; and   a condensation side connection portion for guiding the working fluid condensed by the condenser to the evaporator,   wherein at least one of the evaporation side connection portion and the condensation side connection portion has a curved portion.   
   
   
       2 . The exhaust heat recovery device according to  claim 1 , wherein only the condensation side connection portion among the evaporation side connection portion and the condensation side connection portion has the curved portion. 
   
   
       3 . The exhaust heat recovery device according to  claim 1 , wherein the curved portion is formed into a spiral shape such that a center axis of the spiral shape is approximately in parallel to a vertical direction. 
   
   
       4 . The exhaust heat recovery device according to  claim 1 , wherein the curved portion is formed into an S-like shape. 
   
   
       5 . The exhaust heat recovery device according to  claim 1 , wherein the curved portion is formed into a U-like shape. 
   
   
       6 . The exhaust heat recovery device according to  claim 1 , wherein the curved portion has an arc shape. 
   
   
       7 . The exhaust heat recovery device according to  claim 1 ,
 wherein the condensation side connection portion has the curved portion,   wherein the condensation side connection portion includes a first end connected to the evaporator and a second end connected to the condenser, and   wherein the condensation side connection portion is arranged such that a liquid level in the condensation side connection portion is not higher than that in the condenser.   
   
   
       8 . The exhaust heat recovery device according to  claim 7 , wherein the second end of the condensation side connection portion is positioned higher than the first end of the condensation side connection portion.