WO2007115876A2 - Appareil frigorifique pourvu d'un système de dégivrage - Google Patents

Appareil frigorifique pourvu d'un système de dégivrage Download PDF

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Publication number
WO2007115876A2
WO2007115876A2 PCT/EP2007/052290 EP2007052290W WO2007115876A2 WO 2007115876 A2 WO2007115876 A2 WO 2007115876A2 EP 2007052290 W EP2007052290 W EP 2007052290W WO 2007115876 A2 WO2007115876 A2 WO 2007115876A2
Authority
WO
WIPO (PCT)
Prior art keywords
air passage
evaporator
heating coil
refrigerating appliance
appliance according
Prior art date
Application number
PCT/EP2007/052290
Other languages
German (de)
English (en)
Other versions
WO2007115876A3 (fr
Inventor
Jochen HÄRLEN
Original Assignee
BSH Bosch und Siemens Hausgeräte GmbH
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 BSH Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Priority to US12/225,951 priority Critical patent/US20090165486A1/en
Priority to EP07726799A priority patent/EP2005088A2/fr
Publication of WO2007115876A2 publication Critical patent/WO2007115876A2/fr
Publication of WO2007115876A3 publication Critical patent/WO2007115876A3/fr

Links

Classifications

    • 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
    • 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
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/067—Evaporator fan units
    • 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
    • F25D21/14—Collecting or removing condensed and defrost water; Drip trays
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/065—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air return
    • F25D2317/0655—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air return through the top
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/068—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans
    • F25D2317/0683—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans the fans not of the axial type
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/144—Collecting condense or defrost water; Removing condense or defrost water characterised by the construction of drip water collection pans
    • F25D2321/1441—Collecting condense or defrost water; Removing condense or defrost water characterised by the construction of drip water collection pans inside a refrigerator
    • 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
    • F25D2500/00—Problems to be solved
    • F25D2500/02—Geometry problems

Definitions

  • the present invention relates to a refrigerator with a storage chamber and an evaporator chamber, which communicates with the storage chamber via a cold air passage and a hot air passage and containing an evaporator, is cooled at which from the storage chamber incoming air and then returned to the storage chamber.
  • Such refrigerators are also referred to as no-frost devices.
  • Warm air which flows from the storage chamber into the evaporator chamber, causes moisture, which tends to precipitate on the evaporator, so that in the course of operation of the refrigerator, a layer of ice grows. In order to avoid a deterioration in the efficiency of the device, this ice layer must be removed from time to time.
  • a defrost heater is conventionally mounted in the evaporator chamber, which thaw the ice on the evaporator and drain. The resulting condensation collects at the lowest point of the evaporator chamber and from there passes through a passage to the outside, where it can evaporate.
  • the evaporator For the defrost to start at all, the evaporator must first be warmed to 0 9 C from an operating temperature below 0 9 C, and after the end of the defrost cycle, the evaporator must be cooled down to its operating temperature before returning to the storage chamber can be cooled.
  • heat inevitably flows from the evaporator chamber during defrosting into the storage chamber, the latter subsequently having to be withdrawn again. Such a flow of heat is the stronger, the higher the temperature in the evaporator chamber during defrosting.
  • this object can be achieved according to the invention in a simple manner by a defrost heater which has a higher heat density in a region adjacent to the hot air passage than in an area adjacent to the cold air passage.
  • the air flowing through the evaporator chamber discharges its entrained moisture predominantly in a region of the evaporator adjacent to the hot air passage, so that there the ice layer increases more rapidly in thickness than in an area adjacent to the cold air passage. Accordingly, by applying a higher heating power density to the vicinity of the hot air passage adjacent to the cold air passage, the ice thaws faster in the area adjacent to the warm air passage, so that the ice sheet is degraded substantially over the entire evaporator at the same time , A heating of already defrosted areas, which leads there to a strong increase in temperature, can be avoided.
  • the heater is preferably plate-shaped, so that it can be placed along a main side of the evaporator.
  • the heater extends below the evaporator so that heated air can rise through the evaporator.
  • the heater has a carrier plate and a heating coil arranged on the carrier plate.
  • the heating coil may be materially secured to the support plate, for example by soldering, to ensure good heat transfer from the heating coil to the plate. An attachment of the heating coil to the plate by latching is also considered.
  • the heating coil is preferably arranged on a side facing the evaporator side of the plate. It should also be spaced from the plate for at least part of its length, on the one hand so as not to affect the outflow of condensate dripping from the evaporator onto the plate, and on the other hand to drain heat from the heating coil to the plate, reducing the effectiveness of the process Heat radiation would reduce, limit.
  • the plate is made of a material such as a metal that efficiently reflects incident heat radiation so as to still direct heat radiation emitted from the heating coil in a direction away from the evaporator to the evaporator ,
  • the heating coil is arranged in the area adjacent to the hot air passage denser than in the region of the support plate adjacent to the cold air passage. This allows the use of a heating coil with consistent throughout its length heating power per unit length.
  • Obstruction of the airflow passing through the evaporator chamber through the heating coil can be minimized if the latter is arranged in serpentine lines extending in the passage direction of the air.
  • at least one of the serpentines is arranged completely on the hot air passage adjacent region of the support plate.
  • the heating coil may have a higher heating power per unit length in the region adjacent to the hot air passage than in the region adjacent to the cold air passage. Then, a different distribution of the Schumans emphasize is also feasible if the heating coil is arranged in both areas according to the same pattern.
  • the heating coil comprises two sections connected in series, one of which fills the region adjacent to the warm air passage and the other the region adjacent to the cold air passage.
  • the heating coil can each be arranged separately in serpentines, which extend in the passage direction of the air through the evaporator chamber.
  • a condensation channel is provided, converges in the condensation water from the evaporator, it may be appropriate to lead a portion of the heating coil along the drainage channel to ensure that do not prevent ice residues in the drainage channel drainage of the condensation water from the evaporator and dammed Condensate water freezes again after the end of the defrosting process.
  • FIG. 1 shows a schematic section through an inventive refrigeration device.
  • FIG. 2 shows a perspective view of the evaporator housing of the refrigerating appliance from FIG. 1 with defrost heating arranged therein;
  • Fig. 3 is a plan view of the evaporator housing and the evaporator mounted therein according to a second embodiment of the invention.
  • Fig. 4 is a schematic partial section through an evaporator housing according to a third embodiment of the invention.
  • Fig. 1 shows a schematic section through the upper portion of a refrigeration device according to the invention.
  • the refrigerator has a body 1 and a door 2, which are each realized in a conventional manner as filled with a heat-insulating foam layer 3 hollow body.
  • the interior of the body 1 is divided by a likewise heat-insulating partition 4 into an evaporator chamber 5 and a storage chamber 6.
  • the evaporator chamber 5 is largely filled by a housing 7 of an evaporator assembly in the interior of an evaporator 8 of known type with parallel to the cutting plane running lamellas and a transverse to the slats in serpentine refrigerant pipe is mounted. Below the Evaporator 8 is at the bottom of the housing 7, a defrost heater 15 is mounted.
  • the housing 7 has a hot air passage 9 on its side facing the door 2, passes through the hot air from the storage chamber 6 into the evaporator chamber 5, and a passage 10 on its rear wall of the body 1 side facing 19, behind which a fan 1 1 with Paddle wheel 12 and motor 13 is housed, the air from the housing 7 deducted and presses in a cold air passage 14 to the storage chamber 6.
  • FIG. 2 shows a perspective view of the housing 7 and the defrost heater 15 mounted therein.
  • the housing 7 has a flat, slightly sloping bottom plate 18 which forms the defrost heater 15 with an electrically operated heating coil mounted thereon.
  • the bottom plate 18 is made of metal or plastic, which is metallically coated on its upper side, in order to direct heat radiation radiated downwards by the heating coil onto the evaporator 8.
  • a gutter 20 which extends over the entire width of the housing 7 and is inclined to a drain opening 21.
  • the heating coil comprises a plurality of extending in the depth direction of the body 1 serpentine 16, 17.
  • the serpentine 16, 17 are held on the bottom plate 18 by means of protruding from the bottom plate 18 elastic brackets 22.
  • the brackets 22 keep the heating coil from the bottom plate 18 spaced so that condensation, which drips from the evaporator 8 to the bottom plate 18, can flow unhindered by the heating coil into the gutter 20.
  • serpentines 16 and 17 respectively alternate in the width direction of the bottom plate 18, which extend only below a region of the evaporator 8 adjacent to the hot air passage 9 or under the entire evaporator 8 and thus form two sections with different heating power densities.
  • serpentines could also be provided in more than two different length stages, but all of them emanating from the side of the evaporator 8 facing the hot air passage 9 in order to heat this area of the evaporator 8, which is the most icing in operation, most intensely.
  • a rectilinear section 23 of the Heating coil extends along the gutter 20 to ensure that in this no pieces of ice can be left behind, which hinder the drainage of the dew water.
  • FIG. 3 shows a plan view of an evaporator housing 7 with an evaporator 8 and a defrost heater 25 according to a second embodiment of the invention.
  • the shape of the housing 7 with bottom plate 18 and gutter 20 is the same as described with reference to FIG. 2, and also the evaporator 8 with a refrigerant tube 29 held in fins 28 is identical to that described with reference to FIG.
  • the heating coil 25 has two sections 26, 27, which differ in their heating power per unit length.
  • the more powerful section 26 extends below the portion of the evaporator 8 adjacent to the hot air passage 9, and the less efficient portion 27 below the portion of the evaporator adjacent to the rear wall 19 and thus to the cold air passage.
  • Both sections 26, 27 are laid according to the same pattern, in the form of elongated serpentines 30 in the depth direction of the body.
  • Fig. 4 shows in section a third embodiment of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Defrosting Systems (AREA)
  • Removal Of Water From Condensation And Defrosting (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

L'invention concerne un appareil frigorifique comprenant une chambre de stockage (6) et une chambre d'évaporation (5) qui communique avec la chambre de stockage (6) par l'intermédiaire d'un passage d'air froid (14) et d'un passage d'air chaud (9) et qui contient un évaporateur (8) et un système de dégivrage (15). Ledit système de dégivrage (15) présente dans une région proche du passage d'air chaud (9) une puissance calorifique supérieure à celle observée dans une région proche du passage d'air froid (10).
PCT/EP2007/052290 2006-04-05 2007-03-12 Appareil frigorifique pourvu d'un système de dégivrage WO2007115876A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US12/225,951 US20090165486A1 (en) 2006-04-05 2007-03-12 Refrigeration device comprising a defrost heater
EP07726799A EP2005088A2 (fr) 2006-04-05 2007-03-12 Appareil frigorifique pourvu d'un système de dégivrage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006015994.2 2006-04-05
DE102006015994A DE102006015994A1 (de) 2006-04-05 2006-04-05 Kältegerät mit Abtauheizung

Publications (2)

Publication Number Publication Date
WO2007115876A2 true WO2007115876A2 (fr) 2007-10-18
WO2007115876A3 WO2007115876A3 (fr) 2007-11-29

Family

ID=38513317

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/052290 WO2007115876A2 (fr) 2006-04-05 2007-03-12 Appareil frigorifique pourvu d'un système de dégivrage

Country Status (5)

Country Link
US (1) US20090165486A1 (fr)
EP (1) EP2005088A2 (fr)
DE (1) DE102006015994A1 (fr)
RU (1) RU2419045C2 (fr)
WO (1) WO2007115876A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009074495A1 (fr) 2007-12-13 2009-06-18 BSH Bosch und Siemens Hausgeräte GmbH Appareil réfrigérant

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102317717B (zh) * 2009-02-12 2013-10-09 松下电器产业株式会社 冰箱
DE102009028778A1 (de) 2009-08-21 2011-02-24 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät, insbesondere Haushaltskältegerät, sowie Verfahren zum Betrieb eines solchen Kältegerätes
CN101846419A (zh) * 2010-06-10 2010-09-29 江苏格林电器有限公司 结构改进的蒸发器
DE102010038384A1 (de) * 2010-07-23 2012-01-26 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit Abtaueinrichtung
DE102011006265A1 (de) * 2011-03-28 2012-10-04 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät
KR102236751B1 (ko) * 2014-08-18 2021-04-06 삼성전자주식회사 냉장고
DE102014222851A1 (de) * 2014-11-10 2016-05-12 BSH Hausgeräte GmbH No-Frost-Kältegerät
US10612832B2 (en) * 2015-12-17 2020-04-07 Samsung Electronics Co., Ltd. Refrigerator with defrost operation control
CN106225372B (zh) * 2016-08-24 2018-07-10 青岛海尔股份有限公司 直冷式冰箱
DE102016220158A1 (de) * 2016-10-14 2018-04-19 BSH Hausgeräte GmbH Kältegerät mit Verdampferkammer und Kondenswasserableitung
KR102375122B1 (ko) * 2017-08-03 2022-03-17 엘지전자 주식회사 냉장고
US11021038B2 (en) * 2017-12-11 2021-06-01 Marelli Cabin Comfort Usa, Inc. Lightweight vehicle HVAC structure
US11137194B2 (en) 2019-07-22 2021-10-05 Electrolux Home Products, Inc. Contact defrost heater for bottom mount to evaporator
EP4206578A1 (fr) * 2021-12-28 2023-07-05 Arçelik Anonim Sirketi Dispositif de refroidissement comprenant un évaporateur

Citations (8)

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Publication number Priority date Publication date Assignee Title
BE534774A (fr) *
GB820908A (en) * 1957-04-02 1959-09-30 Andrew George Heron Improvements in or relating to refrigerating apparatus
US3393530A (en) * 1966-10-17 1968-07-23 Whirlpool Co Radiant defrost panel for refrigerator
JPH03217777A (ja) * 1990-01-24 1991-09-25 Mitsubishi Electric Corp 冷却装置
DE19855224A1 (de) * 1998-11-30 2000-05-31 Bsh Bosch Siemens Hausgeraete Kältegerät
US20030115899A1 (en) * 2001-12-21 2003-06-26 Lg Electronics Inc. Defroster for evaporator of refrigerator
JP2004317031A (ja) * 2003-04-16 2004-11-11 Hoshizaki Electric Co Ltd 冷却貯蔵庫
DE202005014373U1 (de) * 2005-09-12 2006-01-05 BSH Bosch und Siemens Hausgeräte GmbH No-Frost-Kältegerät

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US2526032A (en) * 1948-10-11 1950-10-17 Francis L La Porte Defrosting method and apparatus for refrigeration systems
US2685780A (en) * 1951-09-27 1954-08-10 Philco Corp Refrigerating system with defrosting circuit
US2746270A (en) * 1952-07-08 1956-05-22 Gen Electric Defrosting arrangements for refrigerating systems
US2819858A (en) * 1955-12-02 1958-01-14 Avco Mfg Corp Clip for defroster-heaters
CA1069870A (fr) * 1977-03-04 1980-01-15 B.F. Goodrich Company (The) Degrivreur d'helice
US4152900A (en) * 1978-04-04 1979-05-08 Kramer Trenton Co. Refrigeration cooling unit with non-uniform heat input for defrost
JPS5828908B2 (ja) * 1978-11-24 1983-06-18 株式会社東芝 冷蔵庫
GB2251295B (en) * 1990-12-31 1994-09-28 Samsung Electronics Co Ltd Defrost assembly
SE506345C2 (sv) * 1996-04-04 1997-12-08 Electrolux Ab Förångare med ekektrisk värmetråd för avfrostning

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE534774A (fr) *
GB820908A (en) * 1957-04-02 1959-09-30 Andrew George Heron Improvements in or relating to refrigerating apparatus
US3393530A (en) * 1966-10-17 1968-07-23 Whirlpool Co Radiant defrost panel for refrigerator
JPH03217777A (ja) * 1990-01-24 1991-09-25 Mitsubishi Electric Corp 冷却装置
DE19855224A1 (de) * 1998-11-30 2000-05-31 Bsh Bosch Siemens Hausgeraete Kältegerät
US20030115899A1 (en) * 2001-12-21 2003-06-26 Lg Electronics Inc. Defroster for evaporator of refrigerator
JP2004317031A (ja) * 2003-04-16 2004-11-11 Hoshizaki Electric Co Ltd 冷却貯蔵庫
DE202005014373U1 (de) * 2005-09-12 2006-01-05 BSH Bosch und Siemens Hausgeräte GmbH No-Frost-Kältegerät

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009074495A1 (fr) 2007-12-13 2009-06-18 BSH Bosch und Siemens Hausgeräte GmbH Appareil réfrigérant

Also Published As

Publication number Publication date
RU2008143426A (ru) 2010-05-10
EP2005088A2 (fr) 2008-12-24
US20090165486A1 (en) 2009-07-02
RU2419045C2 (ru) 2011-05-20
DE102006015994A1 (de) 2007-10-11
WO2007115876A3 (fr) 2007-11-29

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