EP2146164A2 - Réfrigérateur sans givre - Google Patents

Réfrigérateur sans givre Download PDF

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Publication number
EP2146164A2
EP2146164A2 EP09165314A EP09165314A EP2146164A2 EP 2146164 A2 EP2146164 A2 EP 2146164A2 EP 09165314 A EP09165314 A EP 09165314A EP 09165314 A EP09165314 A EP 09165314A EP 2146164 A2 EP2146164 A2 EP 2146164A2
Authority
EP
European Patent Office
Prior art keywords
refrigeration appliance
compartment
evaporator
air
refrigerating chamber
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.)
Withdrawn
Application number
EP09165314A
Other languages
German (de)
English (en)
Other versions
EP2146164A3 (fr
Inventor
Giorgio Sabatini
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.)
Whirlpool EMEA SpA
Original Assignee
Indesit Co SpA
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 Indesit Co SpA filed Critical Indesit Co SpA
Publication of EP2146164A2 publication Critical patent/EP2146164A2/fr
Publication of EP2146164A3 publication Critical patent/EP2146164A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • F25D17/062—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 in household refrigerators
    • F25D17/065—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 in household refrigerators with compartments at different temperatures

Definitions

  • the present invention relates to a household refrigeration appliance, in particular of the no-frost type, according to the preamble of claim 1.
  • no-frost refrigeration appliances heat is removed from foodstuffs by forced convection, thus generating a circulation of cold air inside the appliance; this feature distinguishes no-frost refrigeration appliances from static ones, i.e. without forced convection.
  • no-frost Another essential difference between no-frost and static refrigeration appliances is the different mode of defrosting, which is controlled electronically in no-frost refrigeration appliances (hence the designation "no-frost"), whereas it is carried out manually in static refrigeration appliances.
  • no-frost refrigeration appliances have at least one inner compartment for preserving foodstuffs. They typically comprise two inner compartments kept at different temperatures, thus providing at least two different foodstuffs preservation states, in particular a refrigerator compartment suitable for preserving fresh food at a temperature between 0°C and 10°C and a freezer compartment suitable for preserving frozen food; such refrigeration appliances are commonly referred to by those skilled in the art of household refrigeration as “double-door” or “combined” refrigerators, depending on the relative position of the two compartments. Furthermore, no-frost refrigeration appliances are equipped with a refrigerating chamber comprising:
  • known evaporators comprise a coil-like tubular element having a plurality of fins adapted to increase the area of thermal exchange between the evaporator and the air to be cooled.
  • said refrigeration appliance For the purpose of keeping the internal temperature of the refrigeration appliance constant over time at a desired value, said refrigeration appliance must be able to eliminate the heat entering the refrigerated environment, e.g. heat entering through the walls of the appliance, when a door is opened and when foodstuffs are placed into the refrigerator for being cooled and preserved. Additional heat is then due to endogenous causes, i.e. generated by heat sources arranged inside the refrigeration appliance itself, such as fan motors, lighting devices, etc.
  • frost turns into compact ice, which may obstruct the air flow between the evaporator fins, resulting in a smaller flow section and a changed thermal exchange coefficient; as a consequence, the ice forming on the evaporator fins is detrimental for thermal exchange and causes inefficient fluid dynamics, because the air must necessarily flow through the meatuses around the evaporator.
  • the air to be cooled flows in peripheral regions of the evaporator, this inevitably leads to less effective cooling of the air flow and consequently to a lower efficiency of the refrigeration appliance.
  • evaporator fins are connected to the coil-like tube by means of suitable joints; it follows that, due to the construction tolerances of these elements, it often happens that the contact between the outer tube walls and the fin ends is not optimal. Since the difference in temperature between the outer tube wall and the fin ends is great (up to about 15 degrees), a missing contact between said elements will determine a considerable reduction in the thermal exchange between the tube and the fins; consequently, the efficiency of the refrigeration appliance will be reduced even further.
  • reference numeral 1 designates a household refrigeration appliance according to the present invention.
  • Refrigeration appliance 1 is a no-frost unit, i.e. of the type in which heat is removed by forced convection by means of cold air circulating inside of it.
  • Said refrigeration appliance 1 comprises at least one inner compartment 10, 20 for preserving foodstuffs.
  • refrigeration appliance 1 comprises a refrigerator compartment 10 adapted to preserve fresh food (typically at a temperature between 0°C and 10°C), and a freezer compartment 20 adapted to preserve frozen food.
  • freezer compartment 20 is arranged on top of refrigerator compartment 10; it is however clear that the arrangement of compartments 10, 20 may also be different, i.e. freezer compartment 20 may alternatively be located under refrigerator compartment 10.
  • Compartments 10 and 20 are closed by respective doors 11, 21; in particular, a first door 11 is used for closing refrigerator compartment 10, and a second door 21 is used for closing freezer compartment 20.
  • refrigeration appliance 1 provided in Fig. 1 only shows some of the elements commonly arranged inside a refrigeration appliance 1, such as a plurality of shelves 12 arranged at different heights; for simplicity, some other common components of a refrigeration appliance 1 are not shown in Fig. 1 .
  • Refrigeration appliance 1 is provided with a refrigerating chamber 30 comprising:
  • the refrigerating power is generated by a compressor 40 belonging to a refrigerating circuit which also includes evaporator 31.
  • Fig. 1 does not show the other components of the refrigerating circuit, in that such components are well known to those skilled in the art of household refrigeration; also, the drawing does not show a defrosting device which may be associated with evaporator 31.
  • the air cooled by evaporator 31 is circulated by fan 32 when the latter is operated by motor 33, and is then released inside refrigeration appliance 1, partly in freezer compartment 20 and partly in refrigerator compartment 10.
  • suitable distribution means which preferably comprise:
  • the cold air After having subtracted heat by forced convection from the foodstuffs contained in refrigerator compartment 10 and freezer compartment 20, and having thus warmed up, the cold air then returns to refrigerating chamber 30 and to evaporator 31.
  • refrigeration appliance 1 comprises:
  • said first intake duct 18 is obtained within said dividing wall 14 arranged between refrigerator compartment 10 and freezer compartment 20.
  • Figs. 2a and 2b are sectional side views of a first and a second embodiment, respectively, of evaporator 31.
  • evaporator 31 comprises a conveying septum 35 adapted to subdivide said refrigerating chamber 30 into a first compartment 30a and a second compartment 30b, and to convey the air flow into said first 30a and second 30b compartment.
  • Said conveying septum 35 extends in a substantially vertical direction inside said refrigerating chamber 30, thus optimizing air flow channeling within said refrigerating chamber 30.
  • evaporator 31 comprises a staggered coil tube 36, i.e. a coil tube having a zig-zag cross-section, which allows to obtain a winding path for the air flow inside said first 30a and second 30b compartment, thus improving the convective thermal exchange between the air flow and evaporator 31.
  • the path followed by the air flow is indicated in Fig. 2a by means of dashed arrows designated P1
  • said coil tube 36 may have an elliptic cross-section, in particular for the purpose of directing the air flow in the most appropriate manner into said first 30a and second 30b compartment while providing a larger thermal exchange area in contact with the air flow.
  • evaporator 31 ensures an adequate thermal exchange between coil tube 36 and the air even without using the fins commonly fitted to known evaporators.
  • said evaporator 31 may be so designed as to comprise a coil tube 36 substantially wound around said conveying septum 35.
  • evaporator 31 comprises at least a first 37a and a second 37b refrigerating panel, in particular of the roll-bond type.
  • the roll-bond production process is a technique for manufacturing diversly channelled panels by bonding a "sandwich" formed by two aluminium sheets through a rolling process.
  • the paths and dimensions of the channels obtained in panels thus manufactured are usually determined by a printing (silk screen) process carried out on one of the inner surfaces of the aluminium sandwich.
  • the junction between the two inner surfaces of the sandwich is actually a welding obtained by combining temperature (sandwich pre-heating) and pressure (hot rolling).
  • the surfaces do not weld together where a special ink is applied during the silk screen process, thus generating paths consisting of unwelded portions within the sandwich.
  • Said unwelded portions can be raised by applying appropriate air pressure (inflating), thus transforming the unwelded paths into channelled paths.
  • said first 37a and second 37b refrigerating panel are located within said refrigerating chamber 30 on opposite sides with respect to conveying septum 35, so that said first 30a and second 30b compartment are subdivided into a plurality of regions, in particular a first region 38a, a second region 38b, a third region 38c and a fourth region 38d.
  • said first 37a and second 37b refrigerating panels comprise a channel 39 having an elongated cross-section, in particular hexagonal, for circulating a refrigerating fluid.
  • Fig. 2b the paths of the air flows are designated by reference P2 and dashed arrows; it can be seen in this drawing that the air flows can lap both sides of said first 37a and second 37b refrigerating panel. It is therefore apparent that the provision of said first 37a and second 37b refrigerating panel in refrigerating chamber 30 allows to attain an optimal convective thermal exchange between the air flows and evaporator 31.
  • said convective thermal exchange is further improved by the special shape of channel 39, which ensures a more effective thermal exchange between evaporator 31 and the air.
  • Another advantage offered by the refrigeration appliance according to the present invention is that it has been conceived in a manner such as to ensure adequate cooling of the air flow used for food preservation.
  • a further advantage of the refrigeration appliance according to the present invention is that it comprises an evaporator so designed as to ensure an optimal convective thermal exchange with the air flows getting in contact therewith.
  • Another advantage of the particular design of evaporator 31 according to the present invention is that it ensures an adequate thermal exchange between coil tube 36 and the air even without using fins as commonly fitted to known evaporators.
  • evaporator 31 may comprise a plurality of refrigerating panels 37a, 37b, so as to further subdivide said first 30a and second 30b compartment and further enhance the convective thermal exchange between the air flows and evaporator 31.
  • said first refrigerating panel 37a and/or said second refrigerating panel 37b may be arranged in refrigerating chamber 30 in a manner such as to be substantially in contact with a first wall 22 and/or a second wall 23.
  • the simplicity of the arrangement of said first 37a and second 37b refrigerating panel allows refrigerating chamber 30 to be manufactured in a particularly economical manner.
  • said first 30a and second 30b compartment only comprise said second region 38b and a third region 38c.
  • Another variant is characterized by a special design of said first refrigerating panel 37a and/or said second refrigerating panel 37b, which are folded on itself in particular into a "G" or spiral-like shape so as to subdivide said first 30a and/or second 30b compartment into a greater number of regions 38a, 38b, 38c, 38d, thus further increasing the area of thermal exchange between evaporator 31 and the air.

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)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP09165314A 2008-07-15 2009-07-13 Réfrigérateur sans givre Withdrawn EP2146164A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO2008A000541A IT1391479B1 (it) 2008-07-15 2008-07-15 Apparecchio di refrigerazione di uso domestico, in particolare del tipo no-frost

Publications (2)

Publication Number Publication Date
EP2146164A2 true EP2146164A2 (fr) 2010-01-20
EP2146164A3 EP2146164A3 (fr) 2010-05-26

Family

ID=40473723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09165314A Withdrawn EP2146164A3 (fr) 2008-07-15 2009-07-13 Réfrigérateur sans givre

Country Status (3)

Country Link
EP (1) EP2146164A3 (fr)
IT (1) IT1391479B1 (fr)
RU (1) RU2498168C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2988081A1 (fr) * 2014-08-21 2016-02-24 Samsung Electronics Co., Ltd. Réfrigérateur
EP3396279A1 (fr) * 2017-04-24 2018-10-31 LG Electronics Inc. Réfrigérateur
WO2019081221A1 (fr) * 2017-10-25 2019-05-02 BSH Hausgeräte GmbH Appareil réfrigérant pourvu d'un évaporateur vertical traversé par de l'air

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1918664A2 (fr) 2006-10-24 2008-05-07 Indesit Company S.p.A. Appareil de réfrigération

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3004400A (en) * 1960-07-08 1961-10-17 Gen Motors Corp Two compartment frost-free refrigerator
US3050961A (en) * 1961-05-09 1962-08-28 Gen Motors Corp Single evaporator two-compartment refrigerator
US3070973A (en) * 1961-06-16 1963-01-01 Gen Motors Corp Refrigerating apparatus
US3080727A (en) * 1961-08-14 1963-03-12 Philco Corp Refrigeration defrosting
US3499295A (en) * 1968-06-17 1970-03-10 Emhart Corp Refrigeration system
US3568465A (en) * 1969-06-05 1971-03-09 Westinghouse Electric Corp Single evaporator for combination refrigeration apparatus
JPH02101368A (ja) * 1988-10-06 1990-04-13 Sanyo Electric Co Ltd 低温ショーケースの運転方法
US5205138A (en) * 1992-01-08 1993-04-27 General Electric Company Spine fin refrigerator evaporator
US5720186A (en) * 1996-11-06 1998-02-24 General Electric Company Heat exchanger
DE10161306A1 (de) * 2001-12-13 2003-06-26 Bsh Bosch Siemens Hausgeraete Kältegerät mit regelbarer Entfeuchtung
KR20040067643A (ko) * 2003-01-24 2004-07-30 삼성전자주식회사 온도조절 챔버를 구비한 냉장고
KR100547341B1 (ko) * 2004-01-28 2006-01-26 엘지전자 주식회사 냉장고
EP1586837A1 (fr) * 2004-04-16 2005-10-19 Electrolux Home Products Corporation N.V. Appareil frigorifique avec congélateur et dispositif de dégivrage

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1918664A2 (fr) 2006-10-24 2008-05-07 Indesit Company S.p.A. Appareil de réfrigération

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2988081A1 (fr) * 2014-08-21 2016-02-24 Samsung Electronics Co., Ltd. Réfrigérateur
US20160054047A1 (en) * 2014-08-21 2016-02-25 Samsung Electronics Co., Ltd. Refrigerator
KR20160023105A (ko) * 2014-08-21 2016-03-03 삼성전자주식회사 냉장고
CN106196822A (zh) * 2014-08-21 2016-12-07 三星电子株式会社 冰箱
US10254036B2 (en) 2014-08-21 2019-04-09 Samsung Electronics Co., Ltd. Refrigerator
CN106196822B (zh) * 2014-08-21 2019-09-10 三星电子株式会社 冰箱
EP3396279A1 (fr) * 2017-04-24 2018-10-31 LG Electronics Inc. Réfrigérateur
US10775094B2 (en) 2017-04-24 2020-09-15 Lg Electronics Inc. Refrigerator
US11473828B2 (en) 2017-04-24 2022-10-18 Lg Electronics Inc. Refrigerator
WO2019081221A1 (fr) * 2017-10-25 2019-05-02 BSH Hausgeräte GmbH Appareil réfrigérant pourvu d'un évaporateur vertical traversé par de l'air
CN111263874A (zh) * 2017-10-25 2020-06-09 Bsh家用电器有限公司 具有被空气竖直地流过的蒸发器的制冷器具

Also Published As

Publication number Publication date
RU2009127172A (ru) 2011-01-20
IT1391479B1 (it) 2011-12-23
EP2146164A3 (fr) 2010-05-26
RU2498168C2 (ru) 2013-11-10
ITTO20080541A1 (it) 2010-01-16

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