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WO2004092673A1 - A heat exchange pipe for a refrigerating machine - Google Patents

A heat exchange pipe for a refrigerating machine Download PDF

Info

Publication number
WO2004092673A1
WO2004092673A1 PCT/KR2004/000880 KR2004000880W WO2004092673A1 WO 2004092673 A1 WO2004092673 A1 WO 2004092673A1 KR 2004000880 W KR2004000880 W KR 2004000880W WO 2004092673 A1 WO2004092673 A1 WO 2004092673A1
Authority
WO
WIPO (PCT)
Prior art keywords
coolant
heat exchange
pipe
cooling water
inner pipe
Prior art date
Application number
PCT/KR2004/000880
Other languages
French (fr)
Inventor
Sung-Jum We
Original Assignee
Param Co. 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 Param Co. Ltd. filed Critical Param Co. Ltd.
Publication of WO2004092673A1 publication Critical patent/WO2004092673A1/en

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
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
    • F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/06—Tubular elements of cross-section which is non-circular crimped or corrugated in cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2210/00—Heat exchange conduits
    • F28F2210/06—Heat exchange conduits having walls comprising obliquely extending corrugations, e.g. in the form of threads

Definitions

  • the present invention relates to a heat exchange pipe for a refrigerating machine, and more particularly, to a heat exchange pipe for a refrigerating machine in which two or more spiral grooves through which coolant flows are formed in a circumference edge of an inner pipe of water cooling heat exchange pipe composed of a double pipe, thereby maximizing a contacting area of coolant and cooling water, and in which the coolant and the cooling water flows in a turbulent manner, thereby maximizing heat exchange efficiency.
  • a refrigerating machine comprises a compressor for pressurizing and transferring a coolant, a condenser for cooling the pressurized and transferred coolant from the compressor, and an evaporator for expanding the cooled and supplied coolant from the condenser and absorbing and cooling a heat from the circumference.
  • the condenser of the refrigerating machine as described above is configured to realize cooling through contact with air in atmosphere by arranging heat exchange pipes in zigzag and placing cooling fins between the heat exchange pipes.
  • the heat exchange pipes are formed by a double tubular body to circulate the cooling water through the inner pipe, and a coolant circulation path through which the coolant is circulated is formed between the inner and the outer pipes such that the cooing is realized by direct contact with cooling water rather than the cooling by convection motion, resulting in maximized cooling efficiency. Disclosure of Invention
  • the present invention is conceived to solve the aforementioned problems, and it is an object of the present invention to provide a heat exchange pipe for a refrigerating machine which two or more spiral grooves through which coolant is flowed are formed in the circumference edge of an inner pipe of a water cooling heat exchange pipe made of a double pipe to maximize a contacting area of coolant and cooling water and also flow of coolant and cooling water is made in a turbulent manner to maximize heat exchange efficiency.
  • the present invention has an advantage that the water contacting area of the inner pipe which is a contacting medium of the coolant and the cooling water is maximized by forming the coolant circulation path made of the two or more grooves which are grooved on the circumference edge of the inner pipe through which the cooling water is circulated, and the cooling of the circulated coolant and the cooling water themselves is realized by the direct contact with the tubular body which is the contacting medium not by the fluid itself of which the heat conductivity is low.
  • FIG. 1 is a perspective view showing an example according to the present invention
  • FIG. 2 is a cross-sectional view showing an example according to the present invention.
  • FIG. 3 is a front- sectional view showing an example according to the present invention.
  • a heat exchange pipe for a refrigerating machine having an inner pipe through which cooling water is circulated, and coolant circulation paths formed between the inner pipe and an outer pipe, the heat exchange pipe comprising:
  • spiral grooves 30 formed therein, the spiral grooves forming the coolant circulation paths on a circumference edge of the inner pipe 10 and spiral protrusions projected inside the inner pipe.
  • a heat exchange pipe for a refrigerating machine comprises an inner pipe 10 which forms cooling water circulation path and coolant circulation paths formed between the inner pipe 10 and outer pipe 20.
  • the heat exchange pipe comprises two or more spiral grooves 30 formed therein, the spiral groove forming the coolant circulation paths on a circumference edge of the inner tube 10 and spiral protrusions projected inside the inner pipelO.
  • ridge portions of the spiral grooves 30 are formed to adhere closely to the inner wall of the outer pipe so that two or more of the coolant circulation paths that are formed by the spiral grooves 30 form independent paths, respectively.
  • said spiral grooves 30 comprise three spiral grooves, and a ratio of the flow rate of the inner pipe 10 through which the cooling water is circulated to the flow rate of the spiral grooves 30 through which the coolant is circulated is 1:3.
  • an inner pipe 10 which has cooling water circulation paths and coolant circulation paths formed between the inner pipe 10 and outer pipe 20, in which the heat exchange pipe comprises two or more spiral grooves 30 which form coolant circulation paths in a circumference edge and spiral protrusions which are projected inside the inner pipelO apply to a refrigerating machine. Consequently, the cooling water flowing into the inner pipe 10 is flowed and circulated in a circular stream so that the cooling water of a central portion and contacted with the inner pipe 10 is mixed and circulated and then flowed, and the coolant which flows along the spiral grooves which are formed on the outer surface of the inner pipe 10 also is circulated and flowed and coolant of the central portion and outside of the inner pipe is circulated and flowed.
  • the coolant can flow along the spiral grooves 30 in which the outer wall of the inner pipe 10 is inserted, thereby maximizing the water contacting area.
  • the present invention has an advantage that the water contacting area of the inner pipe which is a contacting medium of the coolant and the cooling water is maximized by forming the coolant circulation path made of the two or more grooves which are grooved on the circumference edge of the inner pipe through which the cooling water is circulated, and the cooling of the circulated coolant and the cooling water themselves is realized by the direct contact with the tubular body which is the contacting medium not by the fluid itself of which the heat conductivity is low.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The present invention relates to a heat exchange pipe for a refrigerating machine, and more particularly, to a heat exchange pipe for a refrigerating machine which can form two or more spiral grooves through which coolant is flowed into circumference edge of inner pipe of water cooling heat exchange pipe made in double pipes to maximize contacting area of coolant and cooling water and also flow of coolant and cooling water is flowed in turbulence to maximize a heat exchange efficiency. That is, the present invention provides a heat exchange pipe for a refrigerating machine comprising an inner pipe through which cooling water is circulated and coolant circulation paths formed between the inner pipe and the outer pipe, the heat exchange pipe comprising two or more spiral grooves formed therein, the spiral grooves forming the coolant circulation path on circumference edge of said inner pipe and spiral protrusions projected inside the inner pipe. Accordingly, the water contacting area of coolant and cooling water is maximized by forming coolant circulation paths composed of two or more spiral grooves inserted in the circumference edge of the inner pipe through which cooling water is circulated, and the cooling of circuited coolant and cooling water itself is realized by a direct contact with a pipe body as a contact medium, rather than by the fluid itself having low heat conductivity, thereby maximizing the heat conductivity.

Description

Description A HEAT EXCHANGE PIPE FOR A REFRIGERATING
MACHINE
Technical Field
[1] The present invention relates to a heat exchange pipe for a refrigerating machine, and more particularly, to a heat exchange pipe for a refrigerating machine in which two or more spiral grooves through which coolant flows are formed in a circumference edge of an inner pipe of water cooling heat exchange pipe composed of a double pipe, thereby maximizing a contacting area of coolant and cooling water, and in which the coolant and the cooling water flows in a turbulent manner, thereby maximizing heat exchange efficiency.
Background Art
[2] Generally, a refrigerating machine comprises a compressor for pressurizing and transferring a coolant, a condenser for cooling the pressurized and transferred coolant from the compressor, and an evaporator for expanding the cooled and supplied coolant from the condenser and absorbing and cooling a heat from the circumference.
[3] The condenser of the refrigerating machine as described above is configured to realize cooling through contact with air in atmosphere by arranging heat exchange pipes in zigzag and placing cooling fins between the heat exchange pipes.
[4] There is a problem with the heat exchange pipe of the conventional condenser as described above in that the cooling is realized by contact with the air in atmosphere, resulting in poor heat exchange efficiency.
[5] Accordingly, the heat exchange pipes are formed by a double tubular body to circulate the cooling water through the inner pipe, and a coolant circulation path through which the coolant is circulated is formed between the inner and the outer pipes such that the cooing is realized by direct contact with cooling water rather than the cooling by convection motion, resulting in maximized cooling efficiency. Disclosure of Invention
Technical Problem
[6] However, there is a problem with the conventional heat exchange pipe formed by the double pipe as describe above in that it is difficult to maintain uniformly spacing of the coolant circulation path defined between the inner and the outer pipes, and because the flow of the coolant and the cooling water is simple laminar flow, heat exchange with the coolant remote from the inner pipe through which the coolant is circulated is not made smoothly.
Technical Solution
[7] Accordingly, the present invention is conceived to solve the aforementioned problems, and it is an object of the present invention to provide a heat exchange pipe for a refrigerating machine which two or more spiral grooves through which coolant is flowed are formed in the circumference edge of an inner pipe of a water cooling heat exchange pipe made of a double pipe to maximize a contacting area of coolant and cooling water and also flow of coolant and cooling water is made in a turbulent manner to maximize heat exchange efficiency.
Advantageous Effects
[8] Accordingly, the present invention has an advantage that the water contacting area of the inner pipe which is a contacting medium of the coolant and the cooling water is maximized by forming the coolant circulation path made of the two or more grooves which are grooved on the circumference edge of the inner pipe through which the cooling water is circulated, and the cooling of the circulated coolant and the cooling water themselves is realized by the direct contact with the tubular body which is the contacting medium not by the fluid itself of which the heat conductivity is low.
Description of Drawings
[9] The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the accompanying drawings in which:
[10] Fig. 1 is a perspective view showing an example according to the present invention;
[11] Fig. 2 is a cross-sectional view showing an example according to the present invention; and
[12] Fig. 3 is a front- sectional view showing an example according to the present invention.
Best Mode
[13] According to the present invention for achieving the object, there is provided a heat exchange pipe for a refrigerating machine having an inner pipe through which cooling water is circulated, and coolant circulation paths formed between the inner pipe and an outer pipe, the heat exchange pipe comprising:
[14] two or more spiral grooves 30 formed therein, the spiral grooves forming the coolant circulation paths on a circumference edge of the inner pipe 10 and spiral protrusions projected inside the inner pipe.
Mode for Invention [15] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[16] The present invention is intended to maximize a contacting area of coolant and cooling water. And, the present invention is intended to maximize heat exchange efficiency by causing turbulence by circular stream. A heat exchange pipe for a refrigerating machine comprises an inner pipe 10 which forms cooling water circulation path and coolant circulation paths formed between the inner pipe 10 and outer pipe 20. The heat exchange pipe comprises two or more spiral grooves 30 formed therein, the spiral groove forming the coolant circulation paths on a circumference edge of the inner tube 10 and spiral protrusions projected inside the inner pipelO.
[17] Here, it is preferable that ridge portions of the spiral grooves 30 are formed to adhere closely to the inner wall of the outer pipe so that two or more of the coolant circulation paths that are formed by the spiral grooves 30 form independent paths, respectively.
[18] And, it is preferable that said spiral grooves 30 comprise three spiral grooves, and a ratio of the flow rate of the inner pipe 10 through which the cooling water is circulated to the flow rate of the spiral grooves 30 through which the coolant is circulated is 1:3.
[19] Hereafter, a heat-exchange process according to the present invention will be described.
[20] According to the present invention, an inner pipe 10 is implemented which has cooling water circulation paths and coolant circulation paths formed between the inner pipe 10 and outer pipe 20, in which the heat exchange pipe comprises two or more spiral grooves 30 which form coolant circulation paths in a circumference edge and spiral protrusions which are projected inside the inner pipelO apply to a refrigerating machine. Consequently, the cooling water flowing into the inner pipe 10 is flowed and circulated in a circular stream so that the cooling water of a central portion and contacted with the inner pipe 10 is mixed and circulated and then flowed, and the coolant which flows along the spiral grooves which are formed on the outer surface of the inner pipe 10 also is circulated and flowed and coolant of the central portion and outside of the inner pipe is circulated and flowed.
[21] As described above, if the central portion and the outside of the coolant are mixed with each other, cooling is realized by heat transfer through direct contact with the metallic inner pipe leading to uniform circulation of coolant, rather than by heat transfer of the coolant itself having heat conductivity lower than that of metal. The heat transfer in the cooling water is performed in the same process, such that the cooling of the coolant by the cooling water is realized efficiently.
[22] In addition, the coolant can flow along the spiral grooves 30 in which the outer wall of the inner pipe 10 is inserted, thereby maximizing the water contacting area.
Industrial Applicability
[23] Accordingly, the present invention has an advantage that the water contacting area of the inner pipe which is a contacting medium of the coolant and the cooling water is maximized by forming the coolant circulation path made of the two or more grooves which are grooved on the circumference edge of the inner pipe through which the cooling water is circulated, and the cooling of the circulated coolant and the cooling water themselves is realized by the direct contact with the tubular body which is the contacting medium not by the fluid itself of which the heat conductivity is low.

Claims

Claims
[1] A heat exchange pipe for a refrigerating machine having an inner pipe through which cooling water is circulated, and coolant circulation paths formed between the inner pipe and an outer pipe, the heat exchange pipe comprising: two or more spiral grooves 30 formed therein, the spiral grooves forming the coolant circulation paths on a circumference edge of the inner pipe 10 and spiral protrusions projected inside the inner pipe.
[2] The heat exchange pipe according to claim 1, wherein ridge portions of the spiral grooves 30 are formed to be adhered closely to the inner wall of the outer pipe so that two or more of the coolant circulation paths formed by the spiral grooves 30 form independent paths, respectively.
[3] The heat exchange pipe according to claim 1, wherein the spiral grooves 30 comprise three spiral grooves, and a ratio of the flow rate of the inner pipe 10 through which the cooling water is circulated to the flow rate of the spiral grooves 30 through which the coolant is circulated is 1:3.
PCT/KR2004/000880 2003-04-16 2004-04-16 A heat exchange pipe for a refrigerating machine WO2004092673A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2003-0023926 2003-04-16
KR1020030023926A KR20030038599A (en) 2003-04-16 2003-04-16 A pipe for a refrigerating machine

Publications (1)

Publication Number Publication Date
WO2004092673A1 true WO2004092673A1 (en) 2004-10-28

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ID=29579352

Family Applications (1)

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PCT/KR2004/000880 WO2004092673A1 (en) 2003-04-16 2004-04-16 A heat exchange pipe for a refrigerating machine

Country Status (2)

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KR (1) KR20030038599A (en)
WO (1) WO2004092673A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1861668A4 (en) * 2005-03-09 2011-01-19 Kelix Heat Transfer Systems Llc Coaxial-flow heat transfer structures for use in diverse applications
US8161759B2 (en) 2005-03-09 2012-04-24 Kelix Heat Transfer Systems, Llc Method of and apparatus for transferring heat energy between a heat exchanging subsystem above the surface of the earth and material therebeneath using one or more coaxial-flow heat exchanging structures producing turbulence in aqueous-based heat-transfering fluid flowing along helically-extending outer flow channels formed therein
CN103245242A (en) * 2012-02-01 2013-08-14 住友轻金属工业株式会社 Double pipe for heat exchanger
US9669499B2 (en) 2004-11-09 2017-06-06 Denso Corporation Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100555216B1 (en) * 2005-08-23 2006-03-03 김진태 draught beer selling apparatus
KR100893620B1 (en) * 2007-04-10 2009-04-20 노창식 Cooling coil for an induction-heating
KR101031101B1 (en) * 2009-01-14 2011-04-25 손광억 separation type heat exchanger
KR101437560B1 (en) * 2013-04-24 2014-09-04 주식회사 카이저제빙기 A heat exchanger for water cooling system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52133156A (en) * 1976-04-28 1977-11-08 Uop Inc Heat transmission tube and method of producing same
JPH1038491A (en) * 1996-07-23 1998-02-13 Toyo Radiator Co Ltd Double tube type heat exchanger
JP2001201275A (en) * 2000-01-21 2001-07-27 Daikin Ind Ltd Double tube heat exchanger

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52133156A (en) * 1976-04-28 1977-11-08 Uop Inc Heat transmission tube and method of producing same
JPH1038491A (en) * 1996-07-23 1998-02-13 Toyo Radiator Co Ltd Double tube type heat exchanger
JP2001201275A (en) * 2000-01-21 2001-07-27 Daikin Ind Ltd Double tube heat exchanger

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9669499B2 (en) 2004-11-09 2017-06-06 Denso Corporation Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same
EP1861668A4 (en) * 2005-03-09 2011-01-19 Kelix Heat Transfer Systems Llc Coaxial-flow heat transfer structures for use in diverse applications
US8161759B2 (en) 2005-03-09 2012-04-24 Kelix Heat Transfer Systems, Llc Method of and apparatus for transferring heat energy between a heat exchanging subsystem above the surface of the earth and material therebeneath using one or more coaxial-flow heat exchanging structures producing turbulence in aqueous-based heat-transfering fluid flowing along helically-extending outer flow channels formed therein
CN103245242A (en) * 2012-02-01 2013-08-14 住友轻金属工业株式会社 Double pipe for heat exchanger
CN103245242B (en) * 2012-02-01 2016-06-01 株式会社Uacj Double pipe for heat exchanger

Also Published As

Publication number Publication date
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