Double pipe heat exchanger having multi-directional connector and air conditioner for vehicle including the same

Abstract

The present invention relates to a dual pipe heat exchanger and an air conditioner for a vehicle including the same. The present invention relates to a dual pipe heat exchanger having a multi-directional connector construction in which a connector forming the dual pipe heat exchanger includes a first block and a second block and positions where a first fluid supply pipe and internal and external pipes are combined and where a second fluid supply pipe is combined can be freely set, and an air conditioner for a vehicle including the same.

What is claimed is: 
     
         1 . A dual pipe heat exchanger, comprising:
 an external pipe configured to have a plurality of protrusions formed therein, the protrusions being protruded in a central direction of the external pipe from an inner circumferential face thereof and extended in a straight-line form in a length direction of the external pipe;   an internal pipe inserted into the external pipe;   a first fluid supply pipe combined with one end of the internal pipe; and   a connector configured to comprise a space in which the external pipe, the internal pipe, and the first fluid supply pipe are inserted and received,   wherein the connector comprises a first block configured to comprise a first opening into which the first fluid supply pipe is inserted, a second opening into which the external pipe and the internal pipe are inserted, and a first connection passage configured to couple the first and the second openings and form a space where the internal pipe is combined with the first fluid supply pipe and a second block formed over the first block and configured to comprise three or more sides directed toward different directions;   each of the three or more sides has a size in which a coupling hole into which a second fluid supply pipe is inserted and fixed is formed, one of the three or more sides forms an identical plane with a side where the first opening is formed, and the other side placed on an opposite side to the one side forms an identical plane with a side where the second opening is formed;   the coupling hole is formed in any one of the three or more sides of the second block; and   a second connection passage configured to couple the coupling hole and the first connection passage of the first block is formed within the second block.   
     
     
         2 . The dual pipe heat exchanger of  claim 1 , wherein the internal pipe comprises a plurality of protrusions protruded in a central direction of the internal pipe from an inner circumferential face thereof and extended in a straight-line form in a length direction of the internal pipe. 
     
     
         3 . The dual pipe heat exchanger of  claim 1 , wherein the coupling hole is formed to have a specific tilt angle to the first fluid supply pipe in a state in which the second fluid supply pipe is inserted into and fixed to the coupling hole. 
     
     
         4 . The dual pipe heat exchanger of  claim 1 , wherein the side of the second block where the coupling hole is formed is formed to have a specific tilt angle to a plane parallel to the first fluid supply pipe. 
     
     
         5 . The dual pipe heat exchanger of  claim 1 , wherein the coupling hole is formed so that the second fluid supply pipe is parallel to the first fluid supply pipe in a state in which the second fluid supply pipe has been inserted into and fixed to the coupling hole. 
     
     
         6 . The dual pipe heat exchanger of  claim 1 , wherein the coupling hole is formed in any one of sides directed toward a direction different from a direction where the first and the second openings are directed, from among the sides of the second block. 
     
     
         7 . The dual pipe heat exchanger of  claim 1 , wherein a diameter of the first connection passage is greater than a diameter of the first opening and is smaller than a diameter of the second opening. 
     
     
         8 . An air conditioner for a vehicle comprising the dual pipe heat exchanger according to  claim 1 .