| 摘要 |
PURPOSE:To obtain a plurality of heat exchanging medium circuits of single heat exchanger but constituted individually by a method wherein a plural piece of holes is bored at the connecting section of tube elements and second heat exchanging medium circuit is formed by heat exchanging tubes which are penetrated through the holes and connected to the holes through expanding of the tubes. CONSTITUTION:The fist heat exchanging medium circuit C1, from an inlet tube 7 to an outlet port 8 through the descending path 2 of a tube element 1, a lower tank 4, the ascending path 2 of the tube element and an upper tank 5, is formed. On the other hand, the second heat exchanging medium circuit C2 is formed by a method wherein the tube element 1 is provided with a plurality of holes 9 at the connecting section 3 thereof to insert the straight tube section of the heat exchanging tube 10 thereinto while the heat exchanging tube 10 is connected and secured to the tube element 1 and fins 4 by the expanding operation of the tube 10 and the ends of the tube are communicated and connected to a distributor 11. |
