Fin heat exchanger for clothes washing machine or clothes dryer, and method for manufacturing same

Abstract

A fin heat exchanger comprises a set of fins and a heat exchange tube alternating with the set of fins. A metal tube is bent multiple times and then folded at least once to form at least two columns of bent tubing, and then the heat exchange tube is inserted as a whole into the set of fins. In the heat exchanger, no damage resulting from a need for welding is caused to the heat exchange tube, thus the integrity of the heat exchange tube is protected; when a heat-exchange fluid flows through an integrated heat exchange tube, no impact damage is caused to the heat exchange tube as a result of a large fluid impact force, and no leaking of the fluid medium is caused by high-temperature fluid flowing into the heat exchange tube; the heat exchange performance of the heat exchange tube is guaranteed.

We claim: 
     
         1 . A fin heat exchanger for a clothes washing machine or a clothes dryer, comprising a set of fins and a heat exchange tube alternating with the set of fins; wherein, the heat exchange tube is made of a metal tube which has been continuously bent multiple times and then folded at least once to form at least two columns of bent tubing, then the heat exchange tube is inserted as a whole into the set of fins; two ends of the heat exchange tube locate outside of the set of fins, one end is acted as a medium inlet and the other end is acted as a medium outlet; the metal tube is an aluminum tube or a copper tube. 
     
     
         2 . The fin heat exchanger of  claim 1 , wherein, the set of fins comprises multiple heat exchange fins arranged with a space between adjacent fins; multiple sockets are provided on each heat exchange fin for inserting the bent tubing of the heat exchange tube, and each socket corresponds to one bent tubing of the inserted heat exchange tube. 
     
     
         3 . The fin heat exchanger of  claim 2 , wherein, the sockets on adjacent heat exchange fins in the set of fins are overlapped after being projected from upper or lower surfaces of the heat exchange fins. 
     
     
         4 . The fin heat exchanger of  claim 2 , wherein, the set of fins comprises at least two heat exchange fins arranged side by side, the side-by-side heat exchange fins in adjacent sets of fins are integrally formed, and 2-12 sockets are provided along a horizontal direction of the integrally formed heat exchange fins, 2-20 sockets are provided along a vertical direction of the integrally formed heat exchange fins. 
     
     
         5 . The fin heat exchanger of  claim 4 , wherein, the heat exchange fins in adjacent sets of fins are staggered or in a same plane, all the sets of fins form a fin heat exchange unit for inserting the heat exchange tube; 2-12 sockets are provided along the horizontal direction of the fin heat exchange unit, 2-20 sockets are provided along the vertical direction of the fin heat exchange unit. 
     
     
         6 . The fin heat exchanger of  claim 4 , wherein, the sockets are arranged on corresponding heat exchange fins in an inclined way, an angle A between a central line of the sockets and the horizontal direction of the heat exchange fins is 0-90°. 
     
     
         7 . The fin heat exchanger of  claim 6 , wherein, each socket comprises two curved jacks and a linear transfer slot located therebetween to connect the two curved jacks, two linear sections of the bent tubing in the heat exchange tube are inserted correspondingly into the two curved jacks respectively. 
     
     
         8 . The fin heat exchanger of  claim 4 , wherein, spaces between adjacent heat exchange fins are equal or not, and adjacent heat exchange fins are parallel or the extending planes of adjacent heat exchange fins are crossed. 
     
     
         9 . The fin heat exchanger of  claim 8 , wherein, the heat exchange fins are straight-typed or wave-typed. 
     
     
         10 . The fin heat exchanger of  claim 1 , wherein, a bent part of the heat exchange tube is curved. 
     
     
         11 . The fin heat exchanger of  claim 1 , wherein, except the bent part at folded position in the heat exchange tube, the planes of adjacent bent tubing at other position form an angle B. 
     
     
         12 . The fin heat exchanger of  claim 1 , wherein, an external diameter ϕ of the heat exchange tube is 6-12.7 mm, a wall thickness d1 of the heat exchange tube is at least 0.4 mm, and a thickness d2 of the heat exchange fin is at least 0.09 mm. 
     
     
         13 . The tin heat exchanger of  claim 1 , wherein, an inner of the heat exchange tube has a smooth surface or guiding teeth are arranged on the inner along a length direction of the heat exchange tube. 
     
     
         14 . A clothes washing machine or a clothes dryer comprising the fin heat exchanger of  claim 1 .