WO2007045677A1 - Finned evaporator for refrigeration plants which is provided with a defrosting device. - Google Patents

Finned evaporator for refrigeration plants which is provided with a defrosting device. Download PDF

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Publication number
WO2007045677A1
WO2007045677A1 PCT/EP2006/067576 EP2006067576W WO2007045677A1 WO 2007045677 A1 WO2007045677 A1 WO 2007045677A1 EP 2006067576 W EP2006067576 W EP 2006067576W WO 2007045677 A1 WO2007045677 A1 WO 2007045677A1
Authority
WO
WIPO (PCT)
Prior art keywords
evaporator
finned
refrigeration plants
defrosting device
pack
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/EP2006/067576
Other languages
French (fr)
Inventor
Ivano Dal Col
Giosuè TORMENA
Gianangelo Perozzo
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.)
IRCA SpA Industria Resistenze Corazzate e Affini
Original Assignee
IRCA SpA Industria Resistenze Corazzate e Affini
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 IRCA SpA Industria Resistenze Corazzate e Affini filed Critical IRCA SpA Industria Resistenze Corazzate e Affini
Publication of WO2007045677A1 publication Critical patent/WO2007045677A1/en
Anticipated expiration legal-status Critical
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
    • 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
    • F28D1/0477—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 being bent in a serpentine or zig-zag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F25D21/08—Removing frost by electric heating
    • 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
    • F28F17/00—Removing ice or water from heat-exchange apparatus

Definitions

  • the present invention relates to a finned evaporator for refrigeration plants which is provided with a defrosting device.
  • the finned pack of refrigeration units is defrosted using heating elements which embrace the finned pack.
  • Said heating elements consist of resistance elements which are activated at predetermined times, and/or are controlled by suitable control devices.
  • a safety device ensures that the material housed in the refrigeration unit is preserved by blocking activation of the heating elements.
  • An object of the invention is to eliminate these drawbacks by providing a finned refrigerator evaporator comprising a defrosting device providing better heat transfer than those systems currently in use. This and other objects which will be apparent from the ensuing description are attained according to the invention by a finned evaporator for refrigeration plants as claimed in claim 1 .
  • Figure 1 is a side view of a refrigerator evaporator of bank type with a defrosting device of the invention
  • Figure 2 is a cross-section therethrough
  • Figure 3 shows the heating element.
  • the device of the invention is inserted into a bank-type evaporator 2 consisting of a serpentine tube 4 through which the refrigerant fluid flows and which is inserted into a finned pack 6.
  • the fins 8 which support the tube 4 are provided with axial holes 10 with their cross- sections longitudinally aligned to form a plurality of channels for the insertion of heating elements 12 consisting of a flexible conductor cable electrically insulated by a fluorocarbon resin and inserted into a U-bent aluminium sheath.
  • the heating elements 12 are disposed substantially parallel to the rectilinear portions of the tubes 4.
  • the expedient of inserting the heating element into the evaporator body ensures more reliable heat transfer towards those parts involved in ice formation and lesser heat dispersion outwards as in traditional evaporators with a wound resistance element.
  • the heating elements can also be dimensioned, configured and powered to deliver different energy patterns by supplying heat only where necessary, hence reducing energy wastage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Defrosting Systems (AREA)

Abstract

A finned evaporator for refrigeration plants comprising a serpentine tube (4) within which the refrigerant fluid passes, and a finned pack (6), characterised in that at least one resistance element (12) is inserted into the 5 pack and is supported by the fins (8) themselves.

Description

FINNED EVAPORATOR FOR REFRIGERATION PLANTS WHICH IS PROVIDED WITH A DEFROSTING DEVICE
The present invention relates to a finned evaporator for refrigeration plants which is provided with a defrosting device. The finned pack of refrigeration units is defrosted using heating elements which embrace the finned pack. Said heating elements consist of resistance elements which are activated at predetermined times, and/or are controlled by suitable control devices. In the case of excessive heat, a safety device ensures that the material housed in the refrigeration unit is preserved by blocking activation of the heating elements.
These known devices present however certain drawbacks and in particular high energy consumption as the heating element has to operate for a certain time (20 min) in order to reach a predetermined temperature (about 120°C), with a considerable energy outlay, part of which is directed towards the environment external to the evaporator and hence within the refrigeration system itself.
An object of the invention is to eliminate these drawbacks by providing a finned refrigerator evaporator comprising a defrosting device providing better heat transfer than those systems currently in use. This and other objects which will be apparent from the ensuing description are attained according to the invention by a finned evaporator for refrigeration plants as claimed in claim 1 .
The present invention is clarified hereinafter with reference to the accompanying drawings, in which: Figure 1 is a side view of a refrigerator evaporator of bank type with a defrosting device of the invention, Figure 2 is a cross-section therethrough, and Figure 3 shows the heating element.
As can be seen from the figures, the device of the invention is inserted into a bank-type evaporator 2 consisting of a serpentine tube 4 through which the refrigerant fluid flows and which is inserted into a finned pack 6. The fins 8 which support the tube 4 are provided with axial holes 10 with their cross- sections longitudinally aligned to form a plurality of channels for the insertion of heating elements 12 consisting of a flexible conductor cable electrically insulated by a fluorocarbon resin and inserted into a U-bent aluminium sheath. The heating elements 12 are disposed substantially parallel to the rectilinear portions of the tubes 4.
The expedient of inserting the heating element into the evaporator body ensures more reliable heat transfer towards those parts involved in ice formation and lesser heat dispersion outwards as in traditional evaporators with a wound resistance element.
The heating elements can also be dimensioned, configured and powered to deliver different energy patterns by supplying heat only where necessary, hence reducing energy wastage.

Claims

C L A I M S
1. A finned evaporator for refrigeration plants comprising a serpentine tube (4) within which the refrigerant fluid passes, and a finned pack (6), characterised in that at least one resistance element (12) is inserted into the pack and is supported by the fins (8) themselves.
2. An evaporator as claimed in claim 1 , characterised in that the fins are provided with slotted holes (10) through which the resistance element (12) is inserted.
3. An evaporator as claimed in claim 1 , characterised in that the resistance element (12) consists of a U-bent flexible tube, the arms of which are parallel to the arms of the serpentine tube (4).
PCT/EP2006/067576 2005-10-20 2006-10-19 Finned evaporator for refrigeration plants which is provided with a defrosting device. Ceased WO2007045677A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVE2005U000033 2005-10-20
ITVE20050033 ITVE20050033U1 (en) 2005-10-20 2005-10-20 SHEET EVAPORATOR FOR REFRIGERANT SYSTEMS PROVIDED WITH A DEVICE FOR DEFROSTING.

Publications (1)

Publication Number Publication Date
WO2007045677A1 true WO2007045677A1 (en) 2007-04-26

Family

ID=37635794

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/067576 Ceased WO2007045677A1 (en) 2005-10-20 2006-10-19 Finned evaporator for refrigeration plants which is provided with a defrosting device.

Country Status (2)

Country Link
IT (1) ITVE20050033U1 (en)
WO (1) WO2007045677A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012062581A3 (en) * 2010-11-08 2012-10-04 BSH Bosch und Siemens Hausgeräte GmbH Evaporator
WO2012136618A1 (en) * 2011-04-06 2012-10-11 BSH Bosch und Siemens Hausgeräte GmbH Evaporator assembly for a refrigeration appliance
CN104364596A (en) * 2011-11-24 2015-02-18 Bsh博世和西门子家用电器有限公司 Evaporator for a refrigeration device and refrigeration device
FR3031803A1 (en) * 2015-01-21 2016-07-22 Valeo Systemes Thermiques HEAT EXCHANGER AND THERMAL CONDITIONING DEVICE FOR A MOTOR VEHICLE COMPRISING SUCH AN EXCHANGER
EP2505942B1 (en) * 2011-03-17 2018-07-11 Geopowair S.A. Heat pump for a heating system and an exchanger with an array of fins.
WO2025252461A1 (en) 2024-06-07 2025-12-11 BSH Hausgeräte GmbH Refrigeration device and heat exchanger for a refrigeration device

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2529215A (en) * 1947-11-10 1950-11-07 Trane Co Heat exchanger
FR1422987A (en) * 1964-11-16 1966-01-03 Electric defrost device for refrigeration evaporators
JPS61191892A (en) * 1985-02-20 1986-08-26 Matsushita Refrig Co Manufacture of fin tube type heat exchanger
JPS61240099A (en) * 1985-04-16 1986-10-25 Matsushita Refrig Co Heat exchanger
JPS63180091A (en) * 1987-01-21 1988-07-25 Matsushita Refrig Co Manufacture of heat exchanger
EP0955508A2 (en) * 1998-05-04 1999-11-10 Carrier Corporation Evaporator coil with integral heater
US20020023744A1 (en) * 1999-12-10 2002-02-28 Kwang-Il Kim Manufacturing method for split heat exchanger having oval tubes in zigzag pattern
DE20203571U1 (en) * 2002-03-06 2002-05-29 Linde Ag, 65189 Wiesbaden Evaporator with integrated defrost heater
WO2003099487A1 (en) * 2002-05-29 2003-12-04 Arçelik A.S. A method for manufacturing an evaporator

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2529215A (en) * 1947-11-10 1950-11-07 Trane Co Heat exchanger
FR1422987A (en) * 1964-11-16 1966-01-03 Electric defrost device for refrigeration evaporators
JPS61191892A (en) * 1985-02-20 1986-08-26 Matsushita Refrig Co Manufacture of fin tube type heat exchanger
JPS61240099A (en) * 1985-04-16 1986-10-25 Matsushita Refrig Co Heat exchanger
JPS63180091A (en) * 1987-01-21 1988-07-25 Matsushita Refrig Co Manufacture of heat exchanger
EP0955508A2 (en) * 1998-05-04 1999-11-10 Carrier Corporation Evaporator coil with integral heater
US20020023744A1 (en) * 1999-12-10 2002-02-28 Kwang-Il Kim Manufacturing method for split heat exchanger having oval tubes in zigzag pattern
DE20203571U1 (en) * 2002-03-06 2002-05-29 Linde Ag, 65189 Wiesbaden Evaporator with integrated defrost heater
WO2003099487A1 (en) * 2002-05-29 2003-12-04 Arçelik A.S. A method for manufacturing an evaporator

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012062581A3 (en) * 2010-11-08 2012-10-04 BSH Bosch und Siemens Hausgeräte GmbH Evaporator
CN103201570A (en) * 2010-11-08 2013-07-10 Bsh博世和西门子家用电器有限公司 Evaporator
CN103201570B (en) * 2010-11-08 2015-03-18 Bsh博世和西门子家用电器有限公司 Evaporator
EP2505942B1 (en) * 2011-03-17 2018-07-11 Geopowair S.A. Heat pump for a heating system and an exchanger with an array of fins.
WO2012136618A1 (en) * 2011-04-06 2012-10-11 BSH Bosch und Siemens Hausgeräte GmbH Evaporator assembly for a refrigeration appliance
CN103459952A (en) * 2011-04-06 2013-12-18 Bsh博世和西门子家用电器有限公司 Evaporator assembly for refrigeration appliance
CN103459952B (en) * 2011-04-06 2016-08-10 Bsh家用电器有限公司 Evaporator assemblies for refrigerating appliance
CN104364596A (en) * 2011-11-24 2015-02-18 Bsh博世和西门子家用电器有限公司 Evaporator for a refrigeration device and refrigeration device
CN104364596B (en) * 2011-11-24 2017-03-08 Bsh家用电器有限公司 Vaporizer for refrigerating appliance and refrigerating appliance
FR3031803A1 (en) * 2015-01-21 2016-07-22 Valeo Systemes Thermiques HEAT EXCHANGER AND THERMAL CONDITIONING DEVICE FOR A MOTOR VEHICLE COMPRISING SUCH AN EXCHANGER
WO2016116462A1 (en) * 2015-01-21 2016-07-28 Valeo Systemes Thermiques Heat exchanger and thermal conditioning device for a motor vehicle comprising such an exchanger
WO2025252461A1 (en) 2024-06-07 2025-12-11 BSH Hausgeräte GmbH Refrigeration device and heat exchanger for a refrigeration device

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Publication number Publication date
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