Global patent index - EP 1087198 A1

EP 1087198 A1 2001-03-28 - HEAT TRANSFER TUBE WITH INTERNAL GROOVES AND METHOD AND DEVICE FOR MANUFACTURING THE TUBE

Title (en)

HEAT TRANSFER TUBE WITH INTERNAL GROOVES AND METHOD AND DEVICE FOR MANUFACTURING THE TUBE

Title (de)

WÄRMEAUSTAUSCHSROHR MIT INNEREN NUTEN UND VERFAHREN ZU DEREN HERSTELLUNG

Title (fr)

TUBE DE TRANSFERT THERMIQUE AVEC RAINURES INTERNES ET SON PROCEDE DE FABRICATION

Publication

EP 1087198 A1 (EN)

Application

EP 00915441 A

Priority

  • JP 0002300 W
  • JP 10076799 A

Abstract (en)

A pressure loss is reduced by providing a plurality of rows of grooves (3) arranged in V-shaped patterns on an inner surface of a pipe body (1a) so as for the rows of grooves to be symmetric with respect to the pipe axis direction and by forming secondary grooves (6), (7) in a prescribed depth in part of projected portions (5) formed therebetween. Also, even when a refrigerant flow rate is low, the refrigerant flow in the pipe can be appropriately controlled by making widths of the plurality of rows of the grooves (3) arranged in the V-shaped patterns unequal in the circumferential direction to generate swirl in the spiral direction and thereby a heat transfer performance is improved as much as possible. <IMAGE>

IPC 1-7 (main, further and additional classification)

F28F 1/40; B21D 5/12

IPC 8 full level (invention and additional information)

B21C 37/08 (2006.01); B21C 37/20 (2006.01); F28F 1/40 (2006.01)

CPC (invention and additional information)

B21C 37/20 (2013.01); B21C 37/08 (2013.01); F28F 1/40 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1087198 A1 20010328; EP 1087198 A4 20050427; AU 3674800 A 20001114; AU 746338 B2 20020418; CN 1313947 A 20010919; JP 2000292088 A 20001020; JP 3296325 B2 20020624; WO 0062001 A1 20001019

INPADOC legal status

2008-11-21 [REG HK WD] APPLICATIONS WITHDRAWN, DEEMED TO BE WITHDRAWN, OR REFUSED AFTER PUBLICATION IN HONG KONG

- Ref Legal Event Code: WD

- Ref Document Number: 1035023

- Country of Ref Document: HK

2008-03-26 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20071002

2005-04-27 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20050315

2001-03-28 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001208

2001-03-28 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE