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1. 发明专利

JP2004003822A Heat exchanger tube with inner groove 有权
公开(公告)号：JP2004003822A
公开(公告)日：2004-01-08
申请号：JP2003077032
申请日：2003-03-20
申请人： Kobe Steel Ltd , 株式会社神戸製鋼所
发明人： IWAMOTO HIDEKI , HINAKO NOBUAKI , KOSEKI KIYONORI , SAEKI CHIKARA
IPC分类号： F28F1/40
摘要： PROBLEM TO BE SOLVED: To provide a heat exchanger tube with inner groove wherein performance is enhanced and size of a heat exchanger is reduced by making the set of a bending pitch shorter than in the past.
SOLUTION: This heat exchanger tube with inner groove has a groove inclined in the tube axial direction which is formed on the inner surface of a copper or copper alloy tube, and it is bent in U-shape and integrated into the heat exchanger. In the heat exchanger tube with inner groove, the tube outer diameter is 10mm or less, the inclination of the groove to the tube axial direction is 30-55°, the groove bottom width in a section orthogonal to the tube axis of is 0.19mm or more, the ratio h/Di of groove depth h to tube minimum inside diameter Di is 0.035 or less when a lead angle is ≥30° and

2. 发明专利

JP2000283680A PIPE WITH GROOVED INSIDE FACE AND ITS MANUFACTURE 失效
公开(公告)号：JP2000283680A
公开(公告)日：2000-10-13
申请号：JP36195199
申请日：1999-12-20
申请人： KOBE STEEL LTD
发明人： ISHIKAWA MAMORU , SAEKI CHIKARA , KOSEKI KIYONORI , HINAKO NOBUAKI
IPC分类号： B21C37/15 , F28F1/40
摘要： PROBLEM TO BE SOLVED: To provide a pipe having a grooved inside face and a method of manufacturing of the pipe suitable as a heat transfer pipe of a condenser and an evaporator capable of attaining a high condensing performance and a high evaporating performance even in a zone having a less flow rate of refrigerant. SOLUTION: Helically grooved belts 1 having a helical groove in an inside surface of a metallic pipe or an alloy pipe and cross-grooved belts 2 having a group of cross-grooves formed by crossing a plurality of grooves at the inside surface of the metallic pipe or the alloy pipe are arranged in regions that are different from each other. One or a plurality of the helically-grooved belts 1 and the cross-grooved belts 2 are arranged alternately in a circumferential direction of the metallic pipe or the alloy pipe. When the width of the helically grooved belts 1 in the circumferentical direction of the pipe is set as W1 and the width of the cross-grooved belts 2 is set as W2, the ratio W1/W2 of W1 and W2 is 1.1 to 3.0. In addition, it is also possible to set this ratio of W1/W2 to 0.3 to 0.9.

3. 发明专利

JPH1119712A DEVICE FOR WORKING GROOVE OF TUBE WITH GROOVE ON ITS INSIDE SURFACE 失效
公开(公告)号：JPH1119712A
公开(公告)日：1999-01-26
申请号：JP17854597
申请日：1997-07-03
申请人： KOBE STEEL LTD
发明人： HINAKO NOBUAKI , SAEKI CHIKARA , ISHIKAWA MAMORU , KOSEKI KIYONORI , UCHIDA TETSUO
IPC分类号： B21C37/20 , B21C1/22 , B21C3/16 , B21D53/06 , B21H3/00
摘要： PROBLEM TO BE SOLVED: To provide a grooving device for tubes with grooves on its inside surface with which slip between rolling balls and the tube is prevented and fins without irregularity and having uniform height are formed on the inside surface of the tube at high efficiency. SOLUTION: A rolling ball supporting member 2 which is a cylindrical shape and has locking parts 7 for rotatably locking the rolling balls 20 and with which the rolling balls 20 are arranged at proper intervals in the circumferential direction of the tube stock is arranged. Furthermore, a rolling ball restraining member 3 which is the cylindrical shape and coaxially arranged on the outside of the supporting member 2 so as to be relatively rotated to the supporting member 2 and with which the positions of the rolling balls 20 are controlled from the outside is fit and arranged on the outside surface of the supporting member 2 through a ball bearing.

4. 发明专利

JPH10260000A HEAT TRANSFER PIPE WITH INTERNAL SURFACE GROOVE 失效
公开(公告)号：JPH10260000A
公开(公告)日：1998-09-29
申请号：JP6639197
申请日：1997-03-19
申请人： KOBE STEEL LTD
发明人： KOSEKI KIYONORI , HIGO TOMIO
IPC分类号： F28F1/40
摘要： PROBLEM TO BE SOLVED: To provide a heat transfer pipe with an internal surface groove in which an internal surface area of a pipe is large, and is excellent in discharge performance for a medium fluid and in heat transfer performance in both condensation and evaporation. SOLUTION: There is provided an internal surface grooved heat transfer pipe in which there are formed a plurality of spiral parallel grooves 1 slanted in a pipe axial direction in a pipe internal surface and which has an outer diameter of 6 to 10 mm. The grooves 1 are provided in a cross section perpendicular to the pipe axis by -1.71×D +32.3×D-82 or more where D (mm) is the pipe outer diameter, and a crest top angle θ of a crest shape 2 formed between adjacent two grooves 1 is at most 30 deg..

5. 发明专利

JPH10258307A METHOD FOR WORKING TUBE WITH INTERNAL GROOVE 失效
公开(公告)号：JPH10258307A
公开(公告)日：1998-09-29
申请号：JP6150097
申请日：1997-03-14
申请人： KOBE STEEL LTD
发明人： HINAKO NOBUAKI , SAEKI CHIKARA , ISHIKAWA MAMORU , KOSEKI KIYONORI , UCHIDA TETSUO
IPC分类号： F28F1/40 , B21C1/22 , B21C3/08 , B21C3/16 , B21C37/20 , B21H3/00
摘要： PROBLEM TO BE SOLVED: To provide a working method of a tube with an internal groove by which the groove of a grooved plug is not broken and a high fin are stably formed on a tube stock. SOLUTION: The rotational direction 9a of rolling compression balls 1 which are arranged on the outside surface of the tube are made to coincide with the rotational direction 8 of a groove plug 2 which is provided on the inside surface and the balls are rotated. In such a way, by pressing the tube stock 3 against the grooved plug 2 with the rolling compression balls 1, the tube stock 3 is reduced and also the spiral fin which is matched to the groove of the grooved plug is formed on the inside surface of the tube. Furthermore, the tube stock 3 on the inside surface of which the fin is formed is reduced with a finishing die.

6. 发明专利

JP2002301514A METHOD OF MANUFACTURING SEAMLESS HEAT TRANSFER TUBE HAVING GROOVED INSIDE SURFACE 审中-公开
公开(公告)号：JP2002301514A
公开(公告)日：2002-10-15
申请号：JP2002015454
申请日：2002-01-24
申请人： KOBE STEEL LTD
发明人： HINAKO NOBUAKI , KOSEKI KIYONORI , SAEKI CHIKARA , IWAMOTO HIDEKI
IPC分类号： F28F1/40 , B21C1/22 , B21C3/08 , B21C3/16 , B21C37/20 , B21H7/14 , B21H8/00
摘要： PROBLEM TO BE SOLVED: To provide a method capable of manufacturing a seamless heat transfer tube having the grooved inside surface and having a large lead angle at high productivity without increasing the lead angle of a grooved plug and without causing any breakage caused by elongating on the tube. SOLUTION: A tube stock 1 is reduced in its diameter with a floating plug 2 and holding die 3 and the grooves of the grooved plug 5 are transferred on the inside surface of the tube stock 1 by pressing the outside surface of the tube stock 1 with rolling balls 6 which perform planetary revolution on the outside surface of the tube stock 1. At this time, the direction of the revolution of the rolling balls 6 is taken as the same direction as the direction of the rotation of the grooved plug 5. After that, the tube stock 1 on the inside surface of which the grooves are formed is furthermore reduced in the diameter with a finishing die 8 and a tube 9 having the grooved inside surface which has a prescribed outside diameter is obtained.

7. 发明专利

JP2001289584A INNER HELICALLY GROOVED TUBE AND METHOD OF ITS MANUFACTURE 失效
公开(公告)号：JP2001289584A
公开(公告)日：2001-10-19
申请号：JP2000099675
申请日：2000-03-31
申请人： KOBE STEEL LTD
发明人： ISHIKAWA MAMORU , KOSEKI KIYONORI , HINAKO NOBUAKI , SAEKI CHIKARA
IPC分类号： F28F1/40 , B21B1/22 , B21C37/15 , F25B39/00
摘要： PROBLEM TO BE SOLVED: To provide an inner helically grooved tube suitable as the heat transfer tube of a condenser or an evaporator, and a method of its manufacture, in which high condensation performance and high evaporation performance can be ensured even in a region where the flow rate of a refrigerant is low. SOLUTION: Spirally grooved bands 1 where spiral grooves are made in the inner surface of a metal or alloy tube, and intersection grooved bands 2 where a group of a plurality of intersecting grooves are made in the inner surface of a metal or alloy tube are arranged in mutually different regions. A groove separation band 7 is provided between the spirally grooved band 1 and the intersection grooved band 2. A plurality of the spirally grooved bands 1 and the intersection grooved bands 2 are arranged alternately in the circumferential direction of the metal or alloy tube through the groove separation band 7. Assuming the machining widths of the spirally grooved band 1 and the intersection grooved band 2 are W1, W2 in the circumferential direction of the tube, the ratio W1/W2 is in the range of 1.1-3.0. It may be in the range of 0.3-0.9.

8. 发明专利

JP2001248990A INNER SURFACE GROOVED PIPE FOR SUPERCOOLING HEAT EXCHANGER AND HEAT EXCHANGER 失效
公开(公告)号：JP2001248990A
公开(公告)日：2001-09-14
申请号：JP2000057803
申请日：2000-03-02
申请人： KOBE STEEL LTD
发明人： KOSEKI KIYONORI , SAEKI CHIKARA , ISHIKAWA MAMORU
IPC分类号： F28F1/40 , F25B39/04
摘要： PROBLEM TO BE SOLVED: To provide an inner surface groove pipe for a super-cooling heat exchanger having a thermal conductivity and a heat exchanger. SOLUTION: There is provided an inner surface grooved pipe for a supercooling heat exchanger in which a plurality of parallel grooves extending in an axial direction of a pipe are formed. When an angle formed between a direction where the grooves are formed and an axis of pipe is defined as η, a groove pitch of the groove in a direction of circumference of the pipe is defined as P and a height of the fin formed between the grooves is defined as Hf, a value of η/Hf is 100 or less, the groove pitch P is 0.37 mm or less and the angle η is 25 deg. or more.

9. 发明专利

JP2001074384A INTERNALLY GROOVED TUBE 失效
公开(公告)号：JP2001074384A
公开(公告)日：2001-03-23
申请号：JP24670899
申请日：1999-08-31
申请人： KOBE STEEL LTD
发明人： HINAKO NOBUAKI , SAEKI CHIKARA , ISHIKAWA MAMORU , KOSEKI KIYONORI , OSADA TAKU
IPC分类号： B21C1/22 , F28F1/40
摘要： PROBLEM TO BE SOLVED: To provide an internally grooved tube in which lowering of heat transfer performance is prevented along with troubles occurring in the process following expansion of a tube by limiting inclination of fins when expanding the tube. SOLUTION: In a tube having a plurality of parallel grooves 2, in the inner surface thereof, extending spirally in a direction inclining against the axial direction of tube, fins 3 are formed between adjacent grooves on the plane orthogonal to the tube axis such that a line dividing an angle ϕ1, defined by a line connecting the center of tube O and the vertex P of the fin 3 (where the distance between the center of tube O and the fins 3, 4 is shortest) and a line connecting the center of tube O and the vertex P of an adjacent fin 4, equally into two intersects the inner surface of tube at point Q between the fins 3, 4 and the angle θ between a line L4, connecting the intersections of the land parts at the opposite ends of the fin and an imaginary circle 5 having a center at the center of tube O and a radius equal to the tube radius R1 represented by the distance between the center of tube O and the point Q, and a line L5 connecting the middle point 7 of the line L4 and the vertex P of the fin 3 is in the range of 70-90 deg..

10. 发明专利

JPH10206062A HEAT EXCHANGER TUBE WITH INTERNAL GROOVE 失效
公开(公告)号：JPH10206062A
公开(公告)日：1998-08-07
申请号：JP1292997
申请日：1997-01-27
申请人： KOBE STEEL LTD
发明人： KOSEKI KIYONORI , SAEKI CHIKARA , ISHIKAWA MAMORU
IPC分类号： F28F1/40 , F25B39/00
摘要： PROBLEM TO BE SOLVED: To enhance heat transfer performance and lower a pressure drop by setting a lead angle at a specified value between the direction of each groove and the axial direction of a tube to form ridges of grooves at positions of the internal surface of the pipe, which is equally divided in the circumferential direction thereof except for a specified number thereof. SOLUTION: Two kinds of grooves 1 and 2 are formed in the internal surface of a pipe and the height of the ridges of the grooves is common to all of the grooves. The ridges 3 of the grooves are formed at positions of the inner circumference length of the pipe, which is equally divided by (m) in the circumferential direction thereof except for (n) thereof. Hence, m-n of ridges 3 are formed at a pitch of L/m along the inner circumference of the pipe. As a result, the grooves 1 formed being sandwiched between the ridges 3 are made at a pitch of L/m in the length along the direction of the inner circumference of the pipe and the grooves 2 is made at the pitch of 2L/m. In other words, on the inner circumferential surface of the pipe, the grooves 1 with the length of each bottom part thereof along the circumferential direction of the pipe being L/m and the grooves 2 with the length being 2L/m are formed. Lead angles of the grooves 1 and 2 are 20-45. This achieves an excellence in condensing performance while cancelling increase in pressure drop.

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