MY113677A - Heat transfer tube having grooved inner surface and production method therefor - Google Patents
Heat transfer tube having grooved inner surface and production method thereforInfo
- Publication number
- MY113677A MY113677A MYPI96004298A MYPI19964298A MY113677A MY 113677 A MY113677 A MY 113677A MY PI96004298 A MYPI96004298 A MY PI96004298A MY PI19964298 A MYPI19964298 A MY PI19964298A MY 113677 A MY113677 A MY 113677A
- Authority
- MY
- Malaysia
- Prior art keywords
- weld portion
- tube
- fins
- heat transfer
- transfer tube
- Prior art date
Links
Abstract
THE OBJECT OF THE PRESENT INVENTION IS TO OFFER A HEAT TRANSFER TUBE HAVING A GROOVED INNER SURFACE, WHEREIN THE SIDE EDGES OF THE BOARD MATERIAL DO NOT FORM A WAVED SHAPE AND CRACKS DO NOT FORM DURING TUBE EXPANSION. IN ORDER TO ACHIEVE THIS OBJECT, THE GROOVED-INNER-SURFACE HEAT TRANSFER TUBE OF THE PRESENT INVENTION HAS A METALLIC TUBE WITH AN INNER CIRCUMFERENTIAL SURFACE, ON WHICH ARE FORMED A WELD PORTION WHICH EXTENDS IN AN AXIAL DIRECTION OF THIS METALLIC TUBE, A PAIR OF PROJECTING STRIP PORTIONS FORMED PARALLEL TO AND SEPARATE FROM THIS WELD PORTION, AND A PLURALITY OF FINS FORMED IN AN AREA BETWEEN THESE PROJECTING STRIP PORTIONS. THE FINS ARE FORMED WITH A CONSTANT ANGLE WITH RESPECT TO THE TUBE AXIS, AND THE ENDS OF THESE FINS ARE CONNECTED WITH THE PROJECTING STRIP PORTIONS. THE THICKNESS OF THE METALLIC TUBE WITHIN THE GROOVES FORMED BETWEEN THE FINS IS MADE TO INCREASE IN APPROACHING THE WELD PORTION WITHIN AN AREA SURROUNDING THE WELD PORTION WHEREIN THE CENTRAL ANGLE IS WITHIN 30?- 90? ON BOTH SIDES FROM THE CENTER OF WELD PORTION FIG1
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7271337A JP3069277B2 (en) | 1995-10-19 | 1995-10-19 | Heat transfer tube with inner groove and method of manufacturing the same |
Publications (1)
Publication Number | Publication Date |
---|---|
MY113677A true MY113677A (en) | 2002-04-30 |
Family
ID=17498660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MYPI96004298A MY113677A (en) | 1995-10-19 | 1996-10-16 | Heat transfer tube having grooved inner surface and production method therefor |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP3069277B2 (en) |
MY (1) | MY113677A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6066946B2 (en) * | 2014-03-10 | 2017-01-25 | 三菱電機株式会社 | Extrusion die, heat transfer tube manufacturing method, and heat transfer tube |
-
1995
- 1995-10-19 JP JP7271337A patent/JP3069277B2/en not_active Expired - Lifetime
-
1996
- 1996-10-16 MY MYPI96004298A patent/MY113677A/en unknown
Also Published As
Publication number | Publication date |
---|---|
JPH09108732A (en) | 1997-04-28 |
JP3069277B2 (en) | 2000-07-24 |
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