JPS5758088A - Heat transfer pipe - Google Patents

Heat transfer pipe

Info

Publication number
JPS5758088A
JPS5758088A JP12404881A JP12404881A JPS5758088A JP S5758088 A JPS5758088 A JP S5758088A JP 12404881 A JP12404881 A JP 12404881A JP 12404881 A JP12404881 A JP 12404881A JP S5758088 A JPS5758088 A JP S5758088A
Authority
JP
Japan
Prior art keywords
heat transfer
groove
pipe
case
angle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP12404881A
Other languages
Japanese (ja)
Other versions
JPS6027917B2 (en
Inventor
Masaaki Ito
Hideyuki Kimura
Kunio Fujie
Hisashi Nakayama
Tamio Innami
Takehiko Yanagida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12404881A priority Critical patent/JPS6027917B2/en
Publication of JPS5758088A publication Critical patent/JPS5758088A/en
Publication of JPS6027917B2 publication Critical patent/JPS6027917B2/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element

Abstract

PURPOSE: To increase the heat transfer efficiency of the heat transfer pipe and to reduce a pressure loss by a method wherein a spiral groove is formed on the wall of the heat transfer pipe and the depth, the pitch, the sectional configuration and the angle of inclination of the groove with respect to the axis of the pipe are specified.
CONSTITUTION: The spiral groove 2 is formed on the inner wall surface of the heat transfer pipe 1. In this case, the depth of the groove 2 is made to be of 0.02W 0.2mm, the pitch thereof to be of 0.1W0.5mm and the angle β of inclination thereof with respect to the axis of the pipe to be of 4W15°. Further, in case the groove 2 is V-shaped in configuration, the vertical angle is made smaller than an acute angle while in case it is U-shaped in configuration, the ratio of its length is larger than 0.4. Consequently, the transfer of a liquid in the groove is made easily due to the surface tension of the liquid which makes it possible to obtain a high heat transfer efficiency in cooperation with the effect of increasing the sectional area of the heat transfer surface. Further, as the liquid smoothes the groove by covering same, the pressure loss is reduced to the same level as in the case of the conventional smooth pipe.
COPYRIGHT: (C)1982,JPO&Japio
JP12404881A 1981-08-10 1981-08-10 Heat exchanger tubes in the evaporator of compression refrigeration cycles for air conditioning Expired JPS6027917B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12404881A JPS6027917B2 (en) 1981-08-10 1981-08-10 Heat exchanger tubes in the evaporator of compression refrigeration cycles for air conditioning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12404881A JPS6027917B2 (en) 1981-08-10 1981-08-10 Heat exchanger tubes in the evaporator of compression refrigeration cycles for air conditioning

Publications (2)

Publication Number Publication Date
JPS5758088A true JPS5758088A (en) 1982-04-07
JPS6027917B2 JPS6027917B2 (en) 1985-07-02

Family

ID=14875695

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12404881A Expired JPS6027917B2 (en) 1981-08-10 1981-08-10 Heat exchanger tubes in the evaporator of compression refrigeration cycles for air conditioning

Country Status (1)

Country Link
JP (1) JPS6027917B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658892A (en) * 1983-12-28 1987-04-21 Hitachi Cable, Ltd. Heat-transfer tubes with grooved inner surface
US4938282A (en) * 1988-09-15 1990-07-03 Zohler Steven R High performance heat transfer tube for heat exchanger
US5555622A (en) * 1991-02-13 1996-09-17 The Furukawa Electric Co., Ltd. Method of manufacturing a heat transfer small size tube
FR2837270A1 (en) 2002-03-12 2003-09-19 Trefimetaux GROOVED TUBES FOR REVERSIBLE USE FOR HEAT EXCHANGERS
JP2003287392A (en) * 2002-03-28 2003-10-10 Kobe Steel Ltd Boiling type heat transfer pipe
FR2855601A1 (en) 2003-05-26 2004-12-03 Trefimetaux GROOVED TUBES FOR THERMAL EXCHANGERS WITH TYPICALLY AQUEOUS MONOPHASIC FLUID
CN111886459A (en) * 2018-03-20 2020-11-03 三菱电机株式会社 Heat exchanger, refrigeration cycle device, and air conditioner

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658892A (en) * 1983-12-28 1987-04-21 Hitachi Cable, Ltd. Heat-transfer tubes with grooved inner surface
US4938282A (en) * 1988-09-15 1990-07-03 Zohler Steven R High performance heat transfer tube for heat exchanger
US5555622A (en) * 1991-02-13 1996-09-17 The Furukawa Electric Co., Ltd. Method of manufacturing a heat transfer small size tube
FR2837270A1 (en) 2002-03-12 2003-09-19 Trefimetaux GROOVED TUBES FOR REVERSIBLE USE FOR HEAT EXCHANGERS
JP2003287392A (en) * 2002-03-28 2003-10-10 Kobe Steel Ltd Boiling type heat transfer pipe
FR2855601A1 (en) 2003-05-26 2004-12-03 Trefimetaux GROOVED TUBES FOR THERMAL EXCHANGERS WITH TYPICALLY AQUEOUS MONOPHASIC FLUID
US7267166B2 (en) * 2003-05-26 2007-09-11 Trefimetaux S.A. Grooved tubes for heat exchangers that use a single-phase fluid
CN111886459A (en) * 2018-03-20 2020-11-03 三菱电机株式会社 Heat exchanger, refrigeration cycle device, and air conditioner

Also Published As

Publication number Publication date
JPS6027917B2 (en) 1985-07-02

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