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WO2008039074A1 - Cooling element - Google Patents

Cooling element Download PDF

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Publication number
WO2008039074A1
WO2008039074A1 PCT/NO2007/000328 NO2007000328W WO2008039074A1 WO 2008039074 A1 WO2008039074 A1 WO 2008039074A1 NO 2007000328 W NO2007000328 W NO 2007000328W WO 2008039074 A1 WO2008039074 A1 WO 2008039074A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling
cooling element
disks
air
interspaces
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.)
Ceased
Application number
PCT/NO2007/000328
Other languages
French (fr)
Inventor
Jan Ragnar Stokke
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.)
Spot Cooler Systems AS
Original Assignee
Spot Cooler Systems AS
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 Spot Cooler Systems AS filed Critical Spot Cooler Systems AS
Priority to RU2009110950/06A priority Critical patent/RU2473021C2/en
Priority to US12/442,586 priority patent/US20090277621A1/en
Priority to JP2009530303A priority patent/JP2010505085A/en
Priority to EP07834745.7A priority patent/EP2069697A4/en
Publication of WO2008039074A1 publication Critical patent/WO2008039074A1/en
Anticipated expiration legal-status Critical
Priority to US13/644,678 priority patent/US20130098581A1/en
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0475—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits having a single U-bend
    • 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
    • F28F1/24—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 transversely
    • F28F1/32—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 transversely the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/04—Assemblies of fins having different features, e.g. with different fin densities

Definitions

  • the invention relates to a cooling element according to the introductory part of claim 1. More specifically, it relates to a cooling element with a number of cooling disks being assembled to provide restricted interspaces for air to be cooled.
  • cooling elements When assembling cooling elements with disks or lamellas arranged in an air flow to be cooled, it is important to have an efficient exchange between air and metal.
  • the distance between the cooling disks is adapted to the manufacturing, typically without optimization relative to the size.
  • the available space is restricted, requiring compact cooling elements.
  • the main object of the invention is to provide a cooling element having higher efficiency than corresponding prior art cooling elements.
  • the Invention is stated in claim 1.
  • This design provides a substantial increase in cooling and lowering the temperature of air passing through such a cooling element. This is believed to be due to an increased degree of collision at the cooling dishes due to the stepwise constriction of the width of the air slots.
  • Figure 1 shows a side view of an embodiment of the invention, with a cooling element with dishes on cooling tubes, while
  • Figure 2 shows an enlarged section of the dishes of Figure 1.
  • FIG. 1 a cooling element 11 witji end sections 12 and 13 is shown. Between the end sections 12 and 13, two U-shaped cooling tubes 14 and 15 connected to conduct a cooling medium are arranged.
  • the cooling tubes 14 and 15 carry an array of cooling dishes 16 and 17 arranged in alternating order.
  • the cooling dishes 16 extend over the total dishes 16 and 17 arranged in alternating order.
  • the cooling dishes 16 extend over the total height of the cooling elements 11, and are connected to the cooling tubes 14, 15, while the remaining cooling dishes 17 extend half as far as the cooling dishes 16 and are mounted on the lower cooling tubes 14.
  • the interspace between the cooling dishes be 9 millimeters in the upper part and 2,5 - 3 millimeters in the lower part. This means a substantial reduction of the interspaces relative to prior art cooling elements. This provides an increase in the heat transfer. The reason for this increase in efficiency is not clear, but it is believed to be due to the lower interspace creating increased molecular motion and consequently increased collisions between the air molecules.
  • Air molecules being cooled at the transfer from the wider to the narrower interspaces are believed to be getting an increased specific weight and thus have an increased fall velocity and simultaneously oscillate more slowly and create fewer collisions with the succeeding neighbouring molecules.
  • a reduction of the disk interspace to lower than ca. 2,5 millimetres will increase the risk of icing and clogging.
  • the cooling element 11 of the example has a vertical orientation of the interspaces, with a gravitational air flow.
  • the cooling element according to the example can also be used in a forced flow cooling system with a fan. This provides more versatility.
  • the cooling element 11 according to the invention may be used for various cooling purposes, for technical uses and in housings and offices. It is suitable for cooling elements to be suspended over the goods to be cooled.
  • stepwise restricted interspaces Two or more short dishes can be used between each pair with full extension. Or multiple steps can be arranged, provided the narrowest interspaces are in the range 2,5 to 3 millimetre.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Details Of Garments (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

Cooling element, with multiple cooling disks (16, 17) arranged in an array to restrict flow interspaces for the air to be cooled. Cooling disks (16) extending to the inlet side for the air to be cooled, and shorter cooling disks (17) not extending to the inlet side, are arranged alternating order.

Description

Cooling element
The invention relates to a cooling element according to the introductory part of claim 1. More specifically, it relates to a cooling element with a number of cooling disks being assembled to provide restricted interspaces for air to be cooled.
Background
When assembling cooling elements with disks or lamellas arranged in an air flow to be cooled, it is important to have an efficient exchange between air and metal. The distance between the cooling disks is adapted to the manufacturing, typically without optimization relative to the size.
For some purposes, the available space is restricted, requiring compact cooling elements.
Object
The main object of the invention is to provide a cooling element having higher efficiency than corresponding prior art cooling elements.
The Invention The invention is stated in claim 1. This design provides a substantial increase in cooling and lowering the temperature of air passing through such a cooling element. This is believed to be due to an increased degree of collision at the cooling dishes due to the stepwise constriction of the width of the air slots.
The claims 2 - 4 state particular favourable features of the invention. More details will be given in the following description of embodiments of the invention.
Example
The invention is now described with reference to the drawings, wherein Figure 1 shows a side view of an embodiment of the invention, with a cooling element with dishes on cooling tubes, while
Figure 2 shows an enlarged section of the dishes of Figure 1.
In Figure 1 a cooling element 11 witji end sections 12 and 13 is shown. Between the end sections 12 and 13, two U-shaped cooling tubes 14 and 15 connected to conduct a cooling medium are arranged. The cooling tubes 14 and 15 carry an array of cooling dishes 16 and 17 arranged in alternating order. The cooling dishes 16 extend over the total dishes 16 and 17 arranged in alternating order. The cooling dishes 16 extend over the total height of the cooling elements 11, and are connected to the cooling tubes 14, 15, while the remaining cooling dishes 17 extend half as far as the cooling dishes 16 and are mounted on the lower cooling tubes 14. The interspace between the cooling dishes be 9 millimeters in the upper part and 2,5 - 3 millimeters in the lower part. This means a substantial reduction of the interspaces relative to prior art cooling elements. This provides an increase in the heat transfer. The reason for this increase in efficiency is not clear, but it is believed to be due to the lower interspace creating increased molecular motion and consequently increased collisions between the air molecules.
Air molecules being cooled at the transfer from the wider to the narrower interspaces are believed to be getting an increased specific weight and thus have an increased fall velocity and simultaneously oscillate more slowly and create fewer collisions with the succeeding neighbouring molecules.
A reduction of the disk interspace to lower than ca. 2,5 millimetres will increase the risk of icing and clogging.
The cooling element 11 of the example has a vertical orientation of the interspaces, with a gravitational air flow. The cooling element according to the example can also be used in a forced flow cooling system with a fan. This provides more versatility.
The cooling element 11 according to the invention may be used for various cooling purposes, for technical uses and in housings and offices. It is suitable for cooling elements to be suspended over the goods to be cooled.
Modifications
It is also possible to achieve corresponding advantages with other arrangements of stepwise restricted interspaces. Two or more short dishes can be used between each pair with full extension. Or multiple steps can be arranged, provided the narrowest interspaces are in the range 2,5 to 3 millimetre.

Claims

Claims
1. Cooling element, with multiple cooling disks (16, 17) arranged in an array to restrict flow interspaces for the air to be cooled, characterized in that cooling disks (16) extending to the inlet side for the air to be cooled, and shorter cooling disks (17) not extending to the inlet side, are arranged in alternating order.
2. Cooling element according to claim 1 , characterized in that the shorter cooling disks (17) extend over about half the flow distance for the air through the cooling element.
3. Cooling element according to claim 1 or 2, characterized in that the distance between the cooling disks (16, 17) at the dense side of the cooling element (11) is 2,5 - 3 millimetres.
4. Cooling element according to one of the claims 1 to 3, characterized in that from 3 to 4 different heights of disks are arranged, to provide stepwise narrowing interspaces.
PCT/NO2007/000328 2006-09-27 2007-09-18 Cooling element Ceased WO2008039074A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
RU2009110950/06A RU2473021C2 (en) 2006-09-27 2007-09-18 Cooling element
US12/442,586 US20090277621A1 (en) 2006-09-27 2007-09-18 Cooling element
JP2009530303A JP2010505085A (en) 2006-09-27 2007-09-18 Cooling member
EP07834745.7A EP2069697A4 (en) 2006-09-27 2007-09-18 Cooling element
US13/644,678 US20130098581A1 (en) 2006-09-27 2012-10-04 Cooling system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20064338A NO329410B1 (en) 2006-09-27 2006-09-27 Apparel by dress element
NO20064338 2006-09-27

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/644,678 Continuation US20130098581A1 (en) 2006-09-27 2012-10-04 Cooling system

Publications (1)

Publication Number Publication Date
WO2008039074A1 true WO2008039074A1 (en) 2008-04-03

Family

ID=39230410

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2007/000328 Ceased WO2008039074A1 (en) 2006-09-27 2007-09-18 Cooling element

Country Status (7)

Country Link
US (2) US20090277621A1 (en)
EP (1) EP2069697A4 (en)
JP (1) JP2010505085A (en)
CN (1) CN101553700A (en)
NO (1) NO329410B1 (en)
RU (1) RU2473021C2 (en)
WO (1) WO2008039074A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO336628B1 (en) * 2012-12-07 2015-10-12 Sundseth Eiendom As Heat Exchanger
WO2016036732A1 (en) * 2014-09-05 2016-03-10 Carrier Corporation Frost tolerant microchannel heat exchanger for heat pump and refrigeration applications

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018029784A1 (en) * 2016-08-09 2018-02-15 三菱電機株式会社 Heat exchanger and refrigeration cycle device provided with heat exchanger

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3267692A (en) * 1965-05-28 1966-08-23 Westinghouse Electric Corp Staggered finned evaporator structure
US4733293A (en) * 1987-02-13 1988-03-22 Unisys Corporation Heat sink device assembly for encumbered IC package
JPH05157478A (en) * 1991-12-04 1993-06-22 Matsushita Refrig Co Ltd Heat exchanger and refrigerator using the same
US6354367B1 (en) * 2001-02-12 2002-03-12 Rheem Manufacturing Company Air conditioning unit having coil portion with non-uniform fin arrangement
US20030159814A1 (en) * 2002-02-28 2003-08-28 Sin Jong Min Heat exchanger for refrigerator

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US399493A (en) * 1889-03-12 I-eat-absorbing plate for cooling-coils
US2613065A (en) * 1947-11-21 1952-10-07 Chausson Usines Sa Cooling radiator
US2683355A (en) * 1951-01-24 1954-07-13 Koch Butchers Supply Company Open-top refrigerator display case
SU851030A1 (en) * 1977-05-16 1981-07-30 за вители Air cooler
DE2928774C2 (en) * 1979-07-17 1984-03-22 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Freezer with a spacious freezer compartment cooled by natural convection
JPH0545023A (en) * 1991-08-12 1993-02-23 Showa Alum Corp Heat exchanger
JP3126044B2 (en) * 1991-08-12 2001-01-22 昭和アルミニウム株式会社 Heat exchanger
JPH0996473A (en) * 1995-09-29 1997-04-08 Showa Alum Corp Heat exchanger
JP2001133180A (en) * 1999-10-29 2001-05-18 Matsushita Refrig Co Ltd Fin-tube-type heat exchanger
US6923013B2 (en) * 2001-05-04 2005-08-02 Carrier Corporation Evaporator for medium temperature refrigerated merchandiser
US7195059B2 (en) * 2003-05-06 2007-03-27 H2Gen Innovations, Inc. Heat exchanger and method of performing chemical processes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3267692A (en) * 1965-05-28 1966-08-23 Westinghouse Electric Corp Staggered finned evaporator structure
US4733293A (en) * 1987-02-13 1988-03-22 Unisys Corporation Heat sink device assembly for encumbered IC package
JPH05157478A (en) * 1991-12-04 1993-06-22 Matsushita Refrig Co Ltd Heat exchanger and refrigerator using the same
US6354367B1 (en) * 2001-02-12 2002-03-12 Rheem Manufacturing Company Air conditioning unit having coil portion with non-uniform fin arrangement
US20030159814A1 (en) * 2002-02-28 2003-08-28 Sin Jong Min Heat exchanger for refrigerator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2069697A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO336628B1 (en) * 2012-12-07 2015-10-12 Sundseth Eiendom As Heat Exchanger
WO2016036732A1 (en) * 2014-09-05 2016-03-10 Carrier Corporation Frost tolerant microchannel heat exchanger for heat pump and refrigeration applications

Also Published As

Publication number Publication date
RU2009110950A (en) 2010-11-10
US20090277621A1 (en) 2009-11-12
EP2069697A4 (en) 2013-09-25
JP2010505085A (en) 2010-02-18
CN101553700A (en) 2009-10-07
NO20064338L (en) 2008-03-28
EP2069697A1 (en) 2009-06-17
NO329410B1 (en) 2010-10-18
US20130098581A1 (en) 2013-04-25
RU2473021C2 (en) 2013-01-20

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