To reduce processing failure of a refrigerant tube 3 in a manufacturing process of the refrigerant tube 3 in a heat exchanger having the refrigerant tube 3 continuously meanderingly bent.
An oval hole 7 for inserting a bent tube portion of a refrigerant tube inserting hole provided in an insertion side side plate 4 has a shape comprising a rectangular part and two semicircular parts connected to the short sides of the rectangular part and having a diameter shorter than the short side of the rectangular part. The refrigerant tube insertion hole provided in the bent tube part side side plate 5 is formed of a rectangular part and two partially circular parts connected to the short sides of the rectangular part and having a diameter longer than the short side of the rectangular part, so that in the manufacturing process of the heat exchanger, the distance where the refrigerant tube 3 penetrates the oval hole 7 provided to the insertion side side plate 4 can be remarkably shortened, the processing failure of the refrigerant tube 3 in the manufacturing process can be reduced, and the manufacturing cost can be reduced.
Hiroki Naito
Daisuke Nagano
Next Patent: RETROREFLECTIVE PAINT SHOT LAUNCHER FOR FORMING NONCONTACT MEASUREMENT OBJECT PLANE