Spiral Tube Fin Heat Exchanger

Abstract

It is an object to provide a finned tube type heat exchanger (spiral tube fin heat exchanger) capable of having a reduced size and having an increased heat exchange efficiency and, therefore, an increased performance. A spiral tube fin heat exchanger includes a plurality of heat transfer tubes that allow a heat exchanging object to flow therein and each including a radially-extending tube fin on an outer peripheral surface thereof, the plurality of heat transfer tubes being arranged to be oriented in an identical direction, wherein the tube fin has a spiral shape and has a spiral axis being coincident with a center axis of each of the heat transfer tubes, and the plurality of heat transfer tubes are arranged such that tip ends of tube fin portions in one of adjacent heat transfer tubes intrude between tube fin portions in the other one of adjacent heat transfer tubes.

1 . A spiral tube fin heat exchanger comprising a plurality of heat transfer tubes that allow a heat exchanging object to flow therein and that each include a radially-extending tube fin on an outer peripheral surface thereof, a plurality of heat transfer tubes being arranged to be oriented in an identical direction,
 wherein the tube fin has a spiral shape and has a spiral axis being coincident with a center axis of each of the heat transfer tubes, and the plurality of heat transfer tubes are arranged such that tip ends of tube fin portions in one of adjacent heat transfer tubes intrude between tube fin portions in the other one of adjacent heat transfer tubes.   
   
   
       2 . The spiral tube fin heat exchanger according to  claim 1 , wherein the spiral-shaped tube fin is structured such that the tube fin rotates in an opposite direction from a rotating direction of the corresponding tube fin in the adjacent heat transfer tubes. 
   
   
       3 . The spiral tube fin heat exchanger according to  claim 1 , wherein the spiral-shaped tube fin is structured such that the tube fin rotates in an identical direction as a rotating direction of the corresponding tube fin in the adjacent heat transfer tubes. 
   
   
       4 . The spiral tube fin heat exchanger according to  claim 1 , wherein the corresponding tube fin portions in the adjacent heat transfer tubes are structured such that the tube fin portions in at least one of the adjacent heat transfer tubes are provided with protruding portions such that the corresponding tube fin portions are brought into contact with each other through the protruding portions. 
   
   
       5 . The spiral tube fin heat exchanger according to  claim 2 , wherein the corresponding tube fin portions in the adjacent heat transfer tubes are structured such that the tube fin portions in at least one of the adjacent heat transfer tubes are provided with protruding portions such that the corresponding tube fin portions are brought into contact with each other through the protruding portions. 
   
   
       6 . The spiral tube fin heat exchanger according to  claim 3 , wherein the corresponding tube fin portions in the adjacent heat transfer tubes are structured such that the tube fin portions in at least one of the adjacent heat transfer tubes are provided with protruding portions such that the corresponding tube fin portions are brought into contact with each other through the protruding portions.