Claims
- 1. A method of manufacturing a stacked heat exchanger comprising flat tubes and corrugated fins which are alternately put together, wherein each said flat tube is formed by butting two press-formed plates, has an inlet/outlet tank portion formed at one end thereof, and has a fluid passage formed therein for guiding a fluid flowing between said two plates from an inlet tank portion to an outlet tank portion by allowing a U-turn at the other end portion of said flat tube, comprising the steps of disposing caulk fastening portions at a plurality of places on said pair of plates; assembling each flat tube by caulk fastening said pair of plates by means of said caulk fastening portions; putting a plurality of flat tubes and corrugated fins together alternately in a stacked state; and brazing said flat tubes and said corrugated fins in said stacked state in a furnace.
- 2. A method of manufacturing a stacked heat exchanger comprising flat tubes and corrugated fins which are alternately put together, wherein each said flat tube is formed by butting two press-formed plates, has an inlet/outlet tank portion formed at one end thereof, and has a fluid passage formed therein for guiding a fluid flowing between said two plates from an inlet tank portion to an outlet tank portion by allowing a U-turn at the other end portion of said flat tube, comprising the steps of disposing caulk fastening portions at a plurality of places on said pair of plates; inserting an inner fin which forms flow paths of fluid between said pair of plates; assembling said flat tube by caulk fastening said pair of plates by means of said caulk fastening portions with said inner fin being inserted; putting a plurality of said flat tubes and corrugated fins together alternately in a stacked state; and brazing said flat tubes and said corrugated fins in said stacked state in a furnace.
Priority Claims (1)
Number |
Date |
Country |
Kind |
4-228230 |
Aug 1992 |
JPX |
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Parent Case Info
This is a divisional of application Ser. No. 08/112,424, filed on Aug. 25, 1993 now U.S. Pat. No. 5,417,280.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5125453 |
Bertrand et al. |
Jun 1992 |
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Foreign Referenced Citations (1)
Number |
Date |
Country |
3606253A1 |
Nov 1986 |
DEX |
Divisions (1)
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Number |
Date |
Country |
Parent |
112424 |
Aug 1993 |
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