EP1586837A1 - Kühlvorrichtung mit Gefrierfach und Abtauvorrichtung - Google Patents

Kühlvorrichtung mit Gefrierfach und Abtauvorrichtung Download PDF

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Publication number
EP1586837A1
EP1586837A1 EP04101589A EP04101589A EP1586837A1 EP 1586837 A1 EP1586837 A1 EP 1586837A1 EP 04101589 A EP04101589 A EP 04101589A EP 04101589 A EP04101589 A EP 04101589A EP 1586837 A1 EP1586837 A1 EP 1586837A1
Authority
EP
European Patent Office
Prior art keywords
compartment
evaporators
evaporator
valve
fan
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Withdrawn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
EP04101589A
Other languages
English (en)
French (fr)
Inventor
Per Olof Nilsson
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.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
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 Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to EP04101589A priority Critical patent/EP1586837A1/de
Publication of EP1586837A1 publication Critical patent/EP1586837A1/de
Withdrawn legal-status Critical Current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
    • 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
    • F25D21/12—Removing frost by hot-fluid circulating system separate from the refrigerant system
    • 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
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles
    • F25B2347/021—Alternate defrosting
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2511—Evaporator distribution valves
    • 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more 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
    • 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
    • F25D2317/066—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 supply
    • F25D2317/0665—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 supply from 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
    • F25D2317/066—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 supply
    • F25D2317/0666—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 supply from the freezer
    • 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
    • F25D2317/0682—Two or more fans

Definitions

  • This invention refers to an household refrigerator apparatus provided with a food refrigeration compartment, normally held at a temperature around + 5°C, lodging in it a freezer compartment, or a compartment held at a colder temperature, for instance of *, **, *** and that is kept insulated with respect to the refrigerator compartment.
  • these types of apparatuses do use as a refrigerating source a single evaporator, made from a serpentine tube or from a roll-bond, covering the walls of said freezer compartment or that directly forms the same walls; through a suitable sizing of the various used elements it can be easily obtained that the freezer compartment be kept at a low temperature as desired, while the refrigerator temperature compartment is kept at a properly higher temperature.
  • the adopted solutions therefore have taken into account both the automatic defrosting of the refrigerator compartment, and alternatively have developed various solutions aimed to ventilate one or both compartments using a forced air-flow.
  • refrigerator apparatuses When, on the contrary, refrigerator apparatuses are used that must be especially cheap and simple, as those provided with a food refrigeration compartment, normally held at a temperature around 0°C, simply lodging, (but not insulated) a freezer compartment, for example a *, or **, or *** type, then no one of the divulged solutions can be helpful exploited.
  • the patent US 5,487,277 shows a refrigerator apparatus wherein the freezer compartment is insulated and separated from the refrigerator compartment; in this case the proposed solutions are aimed to improve the switching/operating mode of the thermostats, and are not applicable to the case, that is here interesting, relevant to a very cheap apparatus with two compartments held at different temperatures but basically non insulated between each other, as in the cases of a compartment with * or ** or ***.-
  • a refrigerator apparatus is known provided with two compartments at different temperatures, and two respective evaporators and two respective fans; in this case the defrost of the two evaporators is achieved by a controlled-valve arrangement between the two refrigerating circuits, allowing the refrigerating fluid to pass from a circuit to the other; even in this case the showed solution is not helpful as it refers to an apparatus having two separate compartments, and moreover the arrangement of the conduits between the two evaporators is positively quite burdensome.
  • said apparatus should be able to operate and automatically defrost without any need of complicate and expensive devices, and specifically without the need of electronic control devices.
  • this apparatus should be able to be easily manufactured using existing ready available materials and techniques, and be competitive in its construction without suffering any alteration or reduction in the performance and reliability thereof.
  • the instant invention is mainly based on the well known fact that in an refrigerator apparatus, provided with two compartments at different temperatures, and with only one evaporator, the defrosting of said evaporator is given by the relatively high air temperature in the refrigerator compartment, and that such air is blown on the evaporator when it is not operating.
  • an apparatus comprises an external cabinet 1, into which a refrigeration compartment 2 is placed; a freezer compartment 3, that preferably is a *, or ** or ***, is lodged inside said refrigeration compartment 2.
  • Still two distinct evaporators 4, 5 are both placed inside said refrigerator compartment 2, and said evaporators are connected to the only refrigerator group comprising a compressor 6 and a relate condenser 7 (see Fig. 4).-
  • Said two evaporators 4, 5 are lodged in an air duct 8 having the inlet port 8A open in said refrigerator compartment 2 and the output port in the freezer compartment 3, passing through suitable apertures 9 made in a wall 10 of said compartment 3.
  • this apparatus is as follows: during the beginning working time the refrigerating gas coming from the condenser 7 goes to the valve 14, which, having received a suitable signal from the control means 16, directs said fluid towards the evaporator 4; in the same time the same control means 16 sends an operating signal to the fan 12; as a consequence said fan blows a flow of very cooled air from said evaporator 4 into said conduit 8, and from here to the freezer compartment 3.
  • control means sends respective suitable signals both to the valve 14 and to the two fans, so that the refrigerating fluid is now directed to said evaporator 5 only, the fan 12 is de-activated and the fan 13 is activated.
  • the evaporator 4 no more working and neither cooled, is progressively heated by the relatively warmer air of the surrounding room, and the ice/frost generated in the previous cycle is then melted and eliminated through known means.
  • Fig.8 illustrates the specific graphs representing the operating modes of the various functional devices, shown on the same time-base, are represented, in the case two different fans 12, 13 are used.-
  • the main reference is of course the temperature level set by the user on the thermostat, and indicated as To, i. e. an horizontal and absolutely constant line; as a consequence the refrigerator apparatus does work in an intermittent way, and its inner temperature is represented by the line “B", well known to the man skilled in the art; it is apparent that, in correspondence of the temperature limit value Ba or Bb the thermostat 17 will send ON/OFF signals to the compressor, that begins to work or it stops, according to a working mode as shown by the line "C".-
  • control means 16 On the control means 16 a definite change of compressor working mode is selected and pre-defined; during its operation it is continuously monitored whether and when said definite change of compressor working mode is detected.
  • valve 14 deviates changes from a state over the other, deviating the refrigerating flow alternatively from an evaporator to the other, and the signal on said valves 14 is represented by the line "E".
  • the fans 12, 13 instead have to work only during the periods when the compressor is in ON condition, but apparently each fan must work only when the respective fan is working, and must not work when the compressor either is not working, or the compressor is working but it is connected to the other evaporator.
  • the control means 16 sends suitable signals to the valve 14 and to the two fans so that the initial situation is reinstated; from that moment on, is the evaporator 4, now defrosted, to operate together with the respective fan 12, while the evaporator 5 begins its phase of spontaneous defrosting.
  • a separator element 11 is firmly placed; its purpose is to favour the channelling of the different air-flows into said conduit 8 only, and to prevent that an air-flow, cooled from a certain evaporator, be able to reach the other evaporator, so compromising its defrosting.
  • control means 16 is obviously connected to the compressor 6 too, and is so designed that it can send a group of signals to the valve 14, to the compressor 6 and to the two fans 12, 13 so that it can make to operate in the same time, but alternatively, either of the two fans, and of course the compressor.
  • control means 16 is easily apt to be produced by any man skilled in the art, and therefore the detailed description is here omitted.-
  • a pre-defined time sequence or its sequence may be determined by the signal coming from the thermostat 17 measuring the refrigerator compartment temperature, or even according to a combined sequence; for instance, a predefined time sequence can be modified or synchronised by suitable signals coming from said thermostat.
  • Said control means 16 may also be realised in a more complex way and to operate in a more sophisticated way, but this would go against the ratio of this invention, which tends to obtain a very cheap and simple working apparatus, but provided with an automatic defrost.-
  • a useful different embodiment can be obtained with a configuration having a separator 11 such to form two distinct channel 22, 23 in which said two evaporators are respectively disposed; these two distinct channels are supplied with a single common inlet mouth 24, and between said channels 22, 23 and said mouth, a single fan 25 and a damper 26 are placed; said damper is conventionally activated by a suitable actuator that is apt to be selectively positioned so that it allows the air-flow into either of said channels, and so selectively towards said respective evaporators.
  • control means 16 controls not two but the only fan 25, and that the operation of controlling said damper 26 simultaneously with the operation of said valve 14 must be added.
  • these fans are of the radial (tangential) type; indeed such kind of fans can show very limited dimensions in the axial direction, and so they can be mounted in such a way such as to minimise the room requests inside the apparatus.

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  • 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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP04101589A 2004-04-16 2004-04-16 Kühlvorrichtung mit Gefrierfach und Abtauvorrichtung Withdrawn EP1586837A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04101589A EP1586837A1 (de) 2004-04-16 2004-04-16 Kühlvorrichtung mit Gefrierfach und Abtauvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04101589A EP1586837A1 (de) 2004-04-16 2004-04-16 Kühlvorrichtung mit Gefrierfach und Abtauvorrichtung

Publications (1)

Publication Number Publication Date
EP1586837A1 true EP1586837A1 (de) 2005-10-19

Family

ID=34928970

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04101589A Withdrawn EP1586837A1 (de) 2004-04-16 2004-04-16 Kühlvorrichtung mit Gefrierfach und Abtauvorrichtung

Country Status (1)

Country Link
EP (1) EP1586837A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1918662A2 (de) * 2006-10-30 2008-05-07 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
ITTO20080541A1 (it) * 2008-07-15 2010-01-16 Indesit Co Spa Apparecchio di refrigerazione di uso domestico, in particolare del tipo no-frost
CN103363761A (zh) * 2013-07-10 2013-10-23 海信容声(广东)冰箱有限公司 一种带循环风化霜无霜电冰箱及其控制方法
CN103900325A (zh) * 2014-04-14 2014-07-02 合肥美菱股份有限公司 一种多风扇冰箱风道
CN106152675A (zh) * 2015-04-21 2016-11-23 博西华电器（江苏）有限公司 用于制冷器具的化霜方法、化霜控制系统以及制冷器具
CN106322884A (zh) * 2016-08-31 2017-01-11 青岛海尔股份有限公司 冷藏冷冻装置
US20170284724A1 (en) * 2014-09-02 2017-10-05 Samsung Electronics Co., Ltd. Refrigerator
EP3396279A1 (de) * 2017-04-24 2018-10-31 LG Electronics Inc. Kühlschrank
CN111829256A (zh) * 2020-08-05 2020-10-27 安徽富申商用冷链科技有限公司 一种可实现高精度温度控制的风冷冰箱及其控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572052A (en) * 1969-05-15 1971-03-23 Streater Ind Inc Ducted refrigeration unit
US5901570A (en) * 1997-06-30 1999-05-11 Daewoo Electronics Co., Ltd. Refrigerator having a refrigeration system
WO2002037038A1 (en) * 2000-11-03 2002-05-10 Arcelik A.S. A defrosting method and a refrigeration appliance using thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572052A (en) * 1969-05-15 1971-03-23 Streater Ind Inc Ducted refrigeration unit
US5901570A (en) * 1997-06-30 1999-05-11 Daewoo Electronics Co., Ltd. Refrigerator having a refrigeration system
WO2002037038A1 (en) * 2000-11-03 2002-05-10 Arcelik A.S. A defrosting method and a refrigeration appliance using thereof

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1918662A2 (de) * 2006-10-30 2008-05-07 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
EP1918662A3 (de) * 2006-10-30 2008-08-06 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
ITTO20080541A1 (it) * 2008-07-15 2010-01-16 Indesit Co Spa Apparecchio di refrigerazione di uso domestico, in particolare del tipo no-frost
EP2146164A3 (de) * 2008-07-15 2010-05-26 Indesit Company, S.P.A. Kühlschrank ohne Eisbildung
CN103363761A (zh) * 2013-07-10 2013-10-23 海信容声(广东)冰箱有限公司 一种带循环风化霜无霜电冰箱及其控制方法
CN103363761B (zh) * 2013-07-10 2015-06-24 海信容声(广东)冰箱有限公司 一种带循环风化霜无霜电冰箱及其控制方法
CN103900325A (zh) * 2014-04-14 2014-07-02 合肥美菱股份有限公司 一种多风扇冰箱风道
CN103900325B (zh) * 2014-04-14 2016-08-17 合肥美菱股份有限公司 一种多风扇冰箱风道
US10302345B2 (en) * 2014-09-02 2019-05-28 Samsung Electronics Co., Ltd. Refrigerator
US20170284724A1 (en) * 2014-09-02 2017-10-05 Samsung Electronics Co., Ltd. Refrigerator
CN106152675A (zh) * 2015-04-21 2016-11-23 博西华电器（江苏）有限公司 用于制冷器具的化霜方法、化霜控制系统以及制冷器具
CN106322884A (zh) * 2016-08-31 2017-01-11 青岛海尔股份有限公司 冷藏冷冻装置
EP3396279A1 (de) * 2017-04-24 2018-10-31 LG Electronics Inc. Kühlschrank
US10775094B2 (en) 2017-04-24 2020-09-15 Lg Electronics Inc. Refrigerator
US11473828B2 (en) 2017-04-24 2022-10-18 Lg Electronics Inc. Refrigerator
CN111829256A (zh) * 2020-08-05 2020-10-27 安徽富申商用冷链科技有限公司 一种可实现高精度温度控制的风冷冰箱及其控制方法

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