Evaporator tube having an optimised external structure
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F28F-001/10
F28F-013/18
F28D-021/00
출원번호
US-0365850
(2012-11-21)
등록번호
US-9618279
(2017-04-11)
우선권정보
DE-10 2011 121 733 (2011-12-21)
국제출원번호
PCT/EP2012/004811
(2012-11-21)
국제공개번호
WO2013/091759
(2013-06-27)
발명자
/ 주소
Lutz, Ronald
Beutler, Andreas
Schwitalla, Andreas
Revermann, Markus
Rettich, Christian
출원인 / 주소
WIELAND-WERKE AG
대리인 / 주소
Flynn, Thiel, Boutell & Tanis, P.C.
인용정보
피인용 횟수 :
1인용 특허 :
16
초록▼
A metal heat exchanger tube for the evaporation of liquids on the outside of the tube, having a tube axis, a tube wall, and integrally formed ribs that run circumferentially on the outside of the tube. The ribs have a rib foot, rib flanks, and a rib tip, wherein the rib foot projects substantially r
A metal heat exchanger tube for the evaporation of liquids on the outside of the tube, having a tube axis, a tube wall, and integrally formed ribs that run circumferentially on the outside of the tube. The ribs have a rib foot, rib flanks, and a rib tip, wherein the rib foot projects substantially radially from the tube wall. A respective groove is located between every two ribs that are adjacent to one another in the axial direction. At least first, second, and third lateral material projections, which are formed from the material of the ribs, are arranged on a first, second, and third level on the rib flanks in such a way that the grooves are largely covered by all of the material projections. The first, second, and third lateral material projections are formed on levels that are in each case differently spaced apart from the tube wall in the radial direction.
대표청구항▼
1. A metal heat exchanger tube (1) for the evaporation of liquids on the outside (21) of the tube, comprising a tube axis, a tube wall (2), and integrally formed ribs (3) that run circumferentially on the outside (21) of the tube and have a rib foot (31), rib flanks (32), and a rib tip (33), wherein
1. A metal heat exchanger tube (1) for the evaporation of liquids on the outside (21) of the tube, comprising a tube axis, a tube wall (2), and integrally formed ribs (3) that run circumferentially on the outside (21) of the tube and have a rib foot (31), rib flanks (32), and a rib tip (33), wherein the rib foot (31) projects substantially radially from the tube wall (2), the ribs (3) are provided with notches (51) which extend in a direction towards the rib foot (31) from the rib tip (33), there is a respective groove (35) between every two ribs (3) that are adjacent to one another in the axial direction, and wherein lateral material projections formed from material of the ribs (3) are arranged on the rib flanks (32), characterized in that at least first (41), second (42), and third (43) lateral material projections are arranged in such a way that the grooves (35) are largely covered by the material projections (41, 42, 43) taken as a whole, the first (41), second (42) and third (43) lateral material projections are formed on levels that are in each case differently spaced apart from the tube wall (2) in the radial direction and the depth of the notching is less than the height (H) of the ribs (3), on the level of the notches (51), material of the rib (3) forms first lateral material projections (41), which, on a first level, partially cover the groove (35) between two ribs (3) that are adjacent in the axial direction, there are second lateral material projections (42) between the rib tip (33) and the level of the notches (51), said projections partially covering, on a second level, the groove (35) between two ribs (3) that are adjacent in the axial direction, and the regions (54) of the rib tip (33) which are situated between two notches (51) that are adjacent in the circumferential direction of the tube are widened in the axial direction, with the result that the widened regions (54) of the rib tip (33) form third lateral material projections (43), which, on a third level, partially cover the groove (35) between two ribs (3) that are adjacent in the axial direction, characterized in that the grooves (35) between two ribs (3) that are adjacent in the axial direction are largely covered by the material projections (41, 42, 43) taken as a whole. 2. The heat exchanger tube (1) as claimed in claim 1, characterized in that the grooves (35) are covered to such an extent that the proportion of the groove bottom (36) that is visible is no more than 4% of the outer tube surface when viewed radially. 3. The heat exchanger tube (1) as claimed in claim 2, characterized in that the grooves (35) are covered to such an extent that the proportion of the groove bottom (36) that is visible is no more than 2% of the outer tube surface when viewed radially. 4. The heat exchanger tube (1) as claimed in claim 3, characterized in that the grooves (35) are covered to such an extent that the groove bottom (36) is not visible when viewed radially. 5. The heat exchanger tube (1) as claimed in claim 1, characterized in that the lateral material projections (41, 42, 43) are of a discontinuous design in the circumferential direction of the tube on at least one level. 6. The heat exchanger tube (1) as claimed in claim 5, characterized in that the lateral material projections (41, 42, 43) are of a discontinuous design in the circumferential direction of the tube on at least two levels, and the lateral material projections (41, 42, 43) on these levels are arranged at least partially offset relative to one another in the circumferential direction of the tube. 7. The heat exchanger tube (1) as claimed in claim 5, characterized in that the grooves (35) are covered to such an extent that the groove bottom (36) is not visible or is visible only through openings with an area of at most 0.007 mm2 when viewed radially. 8. The heat exchanger tube (1) as claimed in claim 1, characterized in that the lateral extent of the material projections (41, 42, 43) is so great on at least one level that they overlap in the axial direction with the lateral material projections (41, 42, 43) which are formed on at least one other level on an opposite rib flank (32), and that the radial distance of these material projections (41, 42, 43) from the tube wall (2) is chosen in such a way that narrow passages remain between the material projections (41, 42, 43) in the region of overlap.
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이 특허에 인용된 특허 (16)
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Thors Petur (Decatur AL) Clevinger Norman R. (Decatur AL) Campbell Bonnie J. (Decatur AL) Tyler James T. (Decatur AL), Heat transfer tubes and methods of fabrication thereof.
Brand Karine,DEX ; Beutler Andreas,DEX ; Knab Manfred,DEX ; Schuez Gerhard,DEX ; Schwitalla Andreas,DEX, Process for the production of an evaporator tube.
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