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1. 发明专利

JPH06129790A MANUFACTURE OF HEAT EXCHANGER FOR AUTOMOBILE 失效
公开(公告)号：JPH06129790A
公开(公告)日：1994-05-13
申请号：JP26739692
申请日：1992-10-06
申请人： TOYO RADIATOR CO LTD , HITACHI CABLE
发明人： INOUE JOJI , YOSHIDA YOICHIRO , IIZUKA MITSUGI , SASAKI HAJIME , ABE HAJIME , OTA MAKOTO , OIZUMI KIYOSHI
IPC分类号： B23K1/00 , B23K101/14 , F28D1/053 , F28F1/30
摘要： PURPOSE:To provide a method for manufacturing a heat exchanger for an automobile in which a connection after a core is assembled is performed even if melted solder plating to a tube material is not conducted. CONSTITUTION:A core formed of a flat tube 1 in which a coating film of coating agent made of a mixture of solder powder, binder, solvent and flux substance is formed on an outer surface and fins 2 is assembled, heat treated to melt the powder, and the tube 1 is connected to the fins 2.

2. 发明专利

JPH0313796A HEAT TRANSFER TUBE 失效
公开(公告)号：JPH0313796A
公开(公告)日：1991-01-22
申请号：JP15094589
申请日：1989-06-13
申请人： HITACHI CABLE
发明人： HORI MAKOTO , TATSUMI ARITAKA , OIZUMI KIYOSHI , SHINOHARA YOSHIHIRO , OTANI TADAO , INUI KENICHI
IPC分类号： F28F1/40 , B21C37/15 , B21C37/20 , B21D17/00 , B23K11/08
摘要： PURPOSE:To improve heat transfer performance in the operation of an air conditioner by forming spiral grooves having mutually opposite angles to a tube axis to an internal surface in a shape that the circumference of a tube is divided by an even number of 4 or more. CONSTITUTION:Spiral grooves having mutually opposite angles to a tube axis are formed to the internal surface of a heat transfer tube 3 in a shape that a circumference is divided into four. Consequently, a reversal in the direction of inclination of the grooves generated by hairpin machining is not conducted, performance is not changed by the direction of flow of refrigerant before and behind a hairpin section 11, and the performance of the whole evaporator is made better than the time of the usage of a heat transfer tube 2. Accordingly, heat transfer performance in an actual air conditioner can be enhanced without altering the direction of flow of the refrigerant or the constitution of the evaporator. When the base body refrigerant 4 condenses in the tube, a condensate 17 is collected to groove crossing sections 8, thus largely improving condensation performance.

3. 发明专利

JPH0250086A HEAT TRANSFER TUBE FOR CONDENSING WITHIN TUBE AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH0250086A
公开(公告)日：1990-02-20
申请号：JP19962188
申请日：1988-08-10
申请人： HITACHI CABLE
发明人： OTANI TADAO , HORI MAKOTO , OIZUMI KIYOSHI , INUI KENICHI
IPC分类号： F28F1/40
摘要： PURPOSE:To smoothen the flow of liquefied refrigerant, restrain the raking up phenomenon of the refrigerant solution remarkably and increase condensation heat transfer rate particularly by forming parallel grooves, which are parallel to the axial direction of a tube, and orthogonal grooves or slanted grooves, having an angle between the parallel groove, on the internal surface of the tube. CONSTITUTION:The flow of the vapor of refrigerant in a heat transfer tube 10 is changed into turbulent flow by slanted grooves 1, 1 and is condensed while developing excellent heat exchanging efficiency while refrigerant solution, liquefied by the condensation, flows down along the slanted grooves 1, 1 and is stagnated at the lower part of the heat transfer tube 10. Parallel grooves 2, 2 are formed on the lower side of the heat transfer tube 10 and the refrigerant solution, liquefied and condensed, can flow in the parallel grooves 2, 2 very smoothly whereby a behavior, such as comb-up phenomenon of the refrigerant solution which is generated in spiral grooves, will never be generated. Accordingly, the possibility of unnecessary wetting of the wall surface in the tube by the refrigerant solution and the remarkable deterioration of heat transfer efficiency may be eliminated sufficiently by the smooth flowing. According to this method, the miniaturization of the heat exchanger or the miniaturization of a refrigerant device may be achieved and the cost of installation or running cost may be reduced.

4. 发明专利

JPS63306371A HEAT TRANSFER TUBE FOR ABSORBER 失效
公开(公告)号：JPS63306371A
公开(公告)日：1988-12-14
申请号：JP14066487
申请日：1987-06-04
申请人： HITACHI CABLE
发明人： KAWAMATA OSAMU , OTANI TADAO , SAWADA ATSUSHI , OIZUMI KIYOSHI
IPC分类号： F28F1/12 , F25B37/00

5. 发明专利

JPS62138692A HEAT TRANSFER PIPE FOR CONDENSATION AND MANUFACTURE THEREOF 失效
公开(公告)号：JPS62138692A
公开(公告)日：1987-06-22
申请号：JP28003985
申请日：1985-12-12
申请人： HITACHI CABLE
发明人： KAWAMATA OSAMU , OTANI TADAO , OIZUMI KIYOSHI
IPC分类号： F28F1/12 , B21C37/22 , B21D53/06 , F28F1/42
摘要： PURPOSE:To improve heat transfer performance on the outside and inside of a heat transfer pipe by providing a spiral dent line on the outer face of the heat transfer pipe with a specified pitch, putting a wire into the groove and providing a spiral protrustion on the inner face of the pipe along the line which traces on the inner face the dent line on the outer side. CONSTITUTION:A heat transfer pipe 1 is provided on its outer face with grooves 2 of 0.7mm pitch and fins 3 of 1mm high and about 0.4mm thick. Each fin 3 has on its tip shallow depressions which are shorter than the depth of the groove 2. On this heat transfer face there is a metal wire 4 the diameter of which is 1mm and which is wound spirally with 7mm pitch on the pipe 1. On the inner face of the pipe 1 a line of protrusion 6 is provided which traces the metal wire 4. As the height of the protrusion 6 becomes larger, it has an effect of promoting turbulence in the fluid flow inside of the pipe which improves largely the rate of heat transfer in the pipe, but pressure loss accompanies. Accordingly the height of the protrusion 6 is selected according to the capability of a pump for driving fluid through the pipe 1. With this constitution it is possible to improve heat transfer performance on the inside and outside of a heat pipe for condensation.

6. 发明专利

JPS61289293A HEAT TRANSFER TUBE AND MANUFACTURE THEREOF 失效
公开(公告)号：JPS61289293A
公开(公告)日：1986-12-19
申请号：JP12820085
申请日：1985-06-14
申请人： HITACHI LTD , HITACHI CABLE
发明人： KUWABARA HEIKICHI , TAKAHASHI KENJI , YANAGIDA TAKEHIKO , NAKAYAMA HISASHI , SUGIMOTO SHIGEO , OIZUMI KIYOSHI
IPC分类号： B21C37/22 , B21D53/06 , F28F1/12 , F28F1/40 , F28F1/42
摘要： PURPOSE:To provide the heat transfer tube having heat transfer surface structue, high in heat transfer coefficient and durability, and the inexpensive manufacturing method thereof by a method wherein the shape of the section of protuberance, provided in the tube, is constituted of a circle or a smooth curve like the circle at the bottom surface and an arbitrary height while the protuberances are arranged in the tube regularly along a spiral curve. CONSTITUTION:The protuberances 3 are formed on the inner wall surface 1 of the heat transfer tube along the spiral curve. The section of the protuberance 3 is circle or ellipse. When single-phase fluid, having no phase change, flows through the tube, the fluid 60 at the central portion of the tube flows into the axial direction of the tube, however, the flow direction of fluid 61, near the wall surface of the tube, is curved and a part thereof generates vertical vortex having the rotating axis thereof in the axial direction of the tube when it flows through gaps between protuberances. In the transversal section of the tube, the stream line is not curved suddenly when the flow collides against the protuberance since the protuberance is provided with a curvature, therefore, effect of corrosion due to the shear stress of the fluid may be small.

7. 发明专利

JP2001096338A METHOD OF MANUFACTURING COPPER TUBE FOR REFRIGERATOR OR AIR-CONDITIONER 失效
公开(公告)号：JP2001096338A
公开(公告)日：2001-04-10
申请号：JP27283299
申请日：1999-09-27
申请人： MITSUI SHIPBUILDING ENG , HITACHI CABLE
发明人： SASAKI MASAHIKO , FUYU KIYOUHEI , OIZUMI KIYOSHI , SASAKI HAJIME
IPC分类号： B22D11/00 , B22D11/055 , C22F1/00 , C22F1/08
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing a qualified copper tube for a refrigerator or air-conditioner at low manufacturing cost. SOLUTION: A material copper tube is prepared by continuous casting process used a heating mold, and the material tube, having a directionally solidified structure, is processed to form the copper tube with

8. 发明专利

JP2001096337A METHOD OF MANUFACTURING COPPER TUBE 失效
公开(公告)号：JP2001096337A
公开(公告)日：2001-04-10
申请号：JP27283199
申请日：1999-09-27
申请人： MITSUI SHIPBUILDING ENG , HITACHI CABLE
发明人： SASAKI MASAHIKO , FUYU KIYOUHEI , OIZUMI KIYOSHI , SASAKI HAJIME
IPC分类号： B22D11/00 , B21C1/00 , B21C9/00 , B22D11/055 , B22D11/059 , C22C9/00 , C22F1/00 , C22F1/08
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing a copper tube which is inexpensive and stable in quality. SOLUTION: A material tube of copper is cast by a continuous casting process using a heated mold, and the resultant material tube having a directionally solidified structure is processed by applying at least twice of cold drawing and annealing to form the copper tube having a prescribed size.

9. 发明专利

JPH03179614A STABILIZED SUPERCONDUCTING WIRE 失效
公开(公告)号：JPH03179614A
公开(公告)日：1991-08-05
申请号：JP31703189
申请日：1989-12-06
申请人： HITACHI CABLE
发明人： MORIAI HIDESUMI , INABA SHOJI , KURUMISAWA YASUHIRO , OIZUMI KIYOSHI
IPC分类号： H01B12/10
摘要： PURPOSE:To improve the composited processibility of a superconducting wire by arranging a high purity aluminium core in a matrix, and interposing a processibility-lowering prevention layer made of one material selected from Nb, V, Ti, Ta and each of their alloys between the matrix and the high purity aluminium core. CONSTITUTION:A high purity aluminium core 2 is arranged in the matrix 3 of a superconducting wire formed of an ultrathin multicore wire made of a superconducting material, and then a processibility-lowering prevention layer 5 made of at least one material selected from nioblum(Nb), vanadium(V), titanium(Ti), tantalum(Ta), each of their inter-element alloys and a niobium- titanium compound(Nb-Ti) or another niobium-titanium compound(Nb-Ti) having a third element added thereto is interposed between the matrix 3 and the high purity aluminium core 2 in the central part of the matrix. In this case, an intermetallic compound or the like damaging the processibility between both the matrix and the aluminium core is not formed even if high temperature treatment is given to the ultrathin multicore wire in order to give superconductivity thereto. This process can obtain a superconducting wire of not only excellent processibility but also the large stabilizing ability of a stabilizing material.

10. 发明专利

JPS61235694A HEAT TRANSFER TUBE 失效
公开(公告)号：JPS61235694A
公开(公告)日：1986-10-20
申请号：JP7731085
申请日：1985-04-11
申请人： HITACHI CABLE , HITACHI LTD
发明人： KAWAMATA OSAMU , OTANI TADAO , OIZUMI KIYOSHI , KOTO HIROSHI , KUWABARA HEIKICHI , TAKAHASHI KENJI
IPC分类号： F28F1/08 , F28F1/40
摘要： PURPOSE:To reduce pressure loss and improve heat transmittance remarkably by a method wherein protuberances consisting of smooth curves, and parts between protuberances, whose heights are zero or lower than the heights of said protuberances, are arranged alternately and regularly on the inner surface of the heat transfer tube along a spiral curve. CONSTITUTION:The rows of the protuberance 3, whose sectional configuration at the bottom surface and the arbitrary heights is circle, ellipse or unsymmetri cal elliptic curve and whose sectional area is decreased to the direction of height, are arranged on the inner surface of the heat transfer tube 1 with a given interval along a spiral curve so as to be adiabatic while the part between the protuberances are formed so as to have a height of zero or smaller than the height of the protuberance. Further, the area of spaces 8 is made so as to be 20-35% of an area between the maximum inner diameter 6 and the minimum inner diameter 5. As a result, pressure loss may be reduced, the heat transmittance may be improved remarkably. This process can greatly contribute to increase in the efficiency of equipment utilizing this heat transfer tube.

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