EP2520882B1 - Gefrierschrank mit verminderter Frostbildung - Google Patents

Gefrierschrank mit verminderter Frostbildung Download PDF

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Publication number
EP2520882B1
EP2520882B1 EP11164394.6A EP11164394A EP2520882B1 EP 2520882 B1 EP2520882 B1 EP 2520882B1 EP 11164394 A EP11164394 A EP 11164394A EP 2520882 B1 EP2520882 B1 EP 2520882B1
Authority
EP
European Patent Office
Prior art keywords
conduit
freezer
freezer according
frost
collecting container
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.)
Active
Application number
EP11164394.6A
Other languages
English (en)
French (fr)
Other versions
EP2520882A1 (de
Inventor
Alessandro Aronica
Luca Nardi
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 Corp
Original Assignee
Whirlpool Corp
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 Whirlpool Corp filed Critical Whirlpool Corp
Priority to EP11164394.6A priority Critical patent/EP2520882B1/de
Publication of EP2520882A1 publication Critical patent/EP2520882A1/de
Application granted granted Critical
Publication of EP2520882B1 publication Critical patent/EP2520882B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/04—Preventing the formation of frost or condensate
    • 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
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/026—Doors; Covers for open-top cabinets
    • 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
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/02—Refrigerators including a heater

Definitions

  • the present invention relates to a freezer comprising a cabinet defining an inner cavity which can be closed by a door and in which said cavity communicates with the ambient by means of a conduit.
  • frost we mean every refrigeration appliance in which the temperature for storing food is kept in a range close to -18°C (i.e. chest freezers, upright freezers, or portions of so called “combi” refrigerators having a freezer compartment).
  • chest freezers upright freezers, or portions of so called “combi” refrigerators having a freezer compartment.
  • One of the features of the present invention is the use of an internal and dedicated container which is in communication with the conduit between the external ambient and the cavity and which is quickly and easily removable after a certain amount of frost is accumulated therein.
  • a heating device is preferably associated with the conduit, preferably adjacent the end facing the cavity.
  • a chest freezer 10 presents a cabinet 10a having a door or lid 10b hinged thereto.
  • a door or lid 10b hinged thereto.
  • an L-shaped conduit 18 is placed, with a first open end 18a on a side 16a of the outer liner 16 of the door 10b and a second open end 18b on the inner liner 12.
  • the first open end 18a of the conduit 18 is provided with a replaceable filter 19 ( figure 6 ), for instance in the form of a sponge or the like, in order to retain powder and air impurities.
  • a replaceable filter 19 for instance in the form of a sponge or the like, in order to retain powder and air impurities.
  • Such filter can have also antibacterial properties.
  • the second end 18b of the conduit 18 has a conical shape so that its cross section area is increasing towards the cavity of the freezer.
  • a rubber gasket 20 fixed to the rim of the door 10b.
  • the conduit 18 can be provided with a heating resistance 22 ( figure 4 ) on the outside surface of the conduit 18, and electrically connected to the control unit of the appliance (not shown).
  • a heating resistance 22 can be activated according to a certain duty cycle or it can be activated only if the humidity in the ambient air, detected by a specific sensor of the freezer, is higher than a predetermined threshold.
  • shaped notches 17 which are used for removably mounting the frost collecting container 14.
  • This latter comprises a base disc-shaped portion 21 ( figures 7a and 7b ) with a central conical zone 21a having a central aperture (matching the shape of the second end 18b of the conduit 18) and an annular zone 21b having protruding pin 23 adapted to cooperate, in a bayonet fastening system, with the shaped notches 17 of the conduit 18.
  • the outer edge of the annular zone 21b is provided with shaped notches 25 adapted to cooperate with corresponding pins 27 on a rim 29a of the cup-shaped cover portion 29 of the frost collecting container 14.
  • the cover portion 29 is provided centrally with an aluminium disc 31 and with annular walls 33 adapted to create a sort of labyrinth effect for air flow so that humidity of air has high chances to frost on surfaces before passing through apertures 14a.
  • a metal layer can be used as well.
  • the aluminium disc 31 acts as a thermal mass in order to facilitate frost formation on the surface thereof, therefore assuring that the remaining zone of the container 14 is free from frost for a longer time.
  • the container 14 is provided with a toroidal filter 35 with antibacterial and anti-odour properties.
  • the cover portion 29 is provided with elastic tongues 38 with notches adapted to cooperate, in a snap engagement fastening system, with corresponding slots 40 on an annular wall of the base portion 21.
  • FIG 12 it is schematically shown how and where the frost F is accumulating in the container 14, i.e. on its bottom surface.
  • the funnel shape of the second end 18b of the conduit 18, together with the position of the side apertures 14a avoid the formation of frost in other positions different from the bottom of the container 14.
  • the container 14 can be easily removed by the user as a single piece composed by the base potion 21 and by the cover portion 29. It is then a choice of the user to remove manually the frost by separating the two above portions or to leave the frost container 14 in an environment where the frost can melt. This operation of removal of frost increases the time usually needed between defrost operations of the freezer.
  • the air flowing from the side apertures 14a of the container is dry and does not contribute to frost formation on the inner liner of the freezer.
  • Figure 13 shows a further embodiment of the invention in which the conduit 24 is straight and presents its first end 24a on the upper face of the liner 16 of the door 10b and a second end 24b which does not present a conical or funnel shape.
  • the heating resistance 22 is preferably positioned only on the portion of the conduit 24 adjacent its second end 24b.
  • the removable container 14 presents internally a cylindrical central portion 26 which conveys the humid air toward the bottom of the container where the humidity can freeze.
  • Optimal result in terms of clogging avoidance have been obtained by the applicant by using an heating resistance having a power comprised between 15 and 5 W, preferably lower than 10 W, which has been activated in the range of 6 to 2 minutes per hour, preferably about 3 minutes per hour, therefore with a very limited increase in overall power consumption.

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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)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Claims (12)

  1. Gefriertruhe (10), die ein Gehäuse (10a) umfasst, das einen inneren Hohlraum definiert, der durch eine Tür (10b) schließbar ist, und in dem der Hohlraum mit der Umgebung mittels einer Leitung (18, 24) kommuniziert, dadurch gekennzeichnet, dass, die Leitung (18, 24) mit einem Frostsammelbehälter (14) bereitgestellt ist, der entfernbar an einem Ende (18b, 24b) der Leitung (18, 24) in dem Hohlraum montiert ist, und mindestens eine Öffnung (14a) zum Erlauben einer Luftströmung hat, dadurch gekennzeichnet, dass der Behälter (14) ein Frostsammelbehälter ist, wenn er im Inneren der Gefriertruhe (10) platziert ist, und geeignet ist, um zu erlauben, Frost aus dem Behälter zu entfernen, entweder manuell oder durch Schmelzen, wenn der Behälter aus der Gefriertruhe (10) entfernt ist, wobei die Leitung (18, 24) in der Tür (10b) bereitgestellt ist, wobei die Tür in ihrer geschlossenen Konfiguration horizontal ist, wobei der Frostsammelbehälter (14) auf der inneren Auskleidung (12) der Tür (10b) montiert ist, und wobei der Frostsammelbehälter (14) mehrere Öffnungen (14a) auf seiner Seitenwand aufweist.
  2. Gefriertruhe nach Anspruch 1, wobei die Leitung (18, 24) mit einer Heizvorrichtung (22) bereitgestellt ist.
  3. Gefriertruhe nach Anspruch 1, wobei der Frostsammelbehälter (14) eine runde Form hat und die Öffnungen (14a) in seiner kreisförmigen Wand bereitgestellt sind.
  4. Gefriertruhe nach einem der vorhergehenden Ansprüche, wobei die Leitung (18) das Ende (18b), das zu dem Hohlraum weist, mit einer Trichterform aufweist, die einen zunehmenden Querschnittsbereich hin zu dem Hohlraum hat.
  5. Gefriertruhe nach Anspruch 4, wobei die Heizvorrichtung (22) ein Heizwiderstand ist, der auf der äußeren Fläche der Leitung (18, 24) bereitgestellt ist.
  6. Gefriertruhe nach Anspruch 2 oder 5, wobei der Heizwiderstand eine Leistung zwischen 5 und 15 W hat.
  7. Gefriertruhe nach Anspruch 6, wobei der Heizwiderstand für einen Zeitraum von zwischen 2 und 6 Minuten pro Stunde aktiviert ist.
  8. Gefriertruhe nach einem der vorhergehenden Ansprüche, wobei die Leitung (18, 24) mit einem ersetzbaren Filter (19) bereitgestellt ist.
  9. Gefriertruhe nach einem der vorhergehenden Ansprüche, wobei der Frostsammelbehälter (14) einen Basisabschnitt (21) und einen Deckelabschnitt (29) aufweist, die entfernbar zusammengesetzt sind.
  10. Gefriertruhe nach Anspruch 9, wobei der Basisabschnitt (21) des Frostsammelbehälters (14) eine Form hat, die zu einem Ende (18b) der Leitung (18) passt.
  11. Gefriertruhe nach einem der vorhergehenden Ansprüche, wobei der Frostsammelbehälter (14) mit einer internen Schicht oder einer Scheibe (31) aus Metall bereitgestellt ist.
  12. Gefriertruhe nach einem der vorhergehenden Ansprüche, wobei der Frostsammelbehälter (14) mit einem internen Filter (35) und/oder einer internen Wand (33) bereitgestellt ist, die einen Labyrinth-Durchgang für eine Luftströmung bilden.
EP11164394.6A 2011-05-02 2011-05-02 Gefrierschrank mit verminderter Frostbildung Active EP2520882B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11164394.6A EP2520882B1 (de) 2011-05-02 2011-05-02 Gefrierschrank mit verminderter Frostbildung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11164394.6A EP2520882B1 (de) 2011-05-02 2011-05-02 Gefrierschrank mit verminderter Frostbildung

Publications (2)

Publication Number Publication Date
EP2520882A1 EP2520882A1 (de) 2012-11-07
EP2520882B1 true EP2520882B1 (de) 2017-09-27

Family

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Family Applications (1)

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EP11164394.6A Active EP2520882B1 (de) 2011-05-02 2011-05-02 Gefrierschrank mit verminderter Frostbildung

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EP (1) EP2520882B1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104019601B (zh) * 2014-05-16 2016-12-07 杭州华日家电有限公司 一种采用直冷微霜技术的电冰箱
EP3088822B1 (de) * 2015-04-29 2019-01-09 Whirlpool Corporation Kühlgerät mit druckausgleichendes ventil
CN105157321A (zh) * 2015-08-18 2015-12-16 合肥华凌股份有限公司 透气减霜装置、门体及其冷柜
US10184713B2 (en) 2016-01-06 2019-01-22 Electrolux Home Products, Inc. Evaporator shields
CN106091504A (zh) * 2016-06-17 2016-11-09 西安交通大学 一种具有自动除霜功能的冷柜及其除霜控制方法
EP3364135B1 (de) 2017-02-16 2020-07-22 Whirlpool Corporation Gefriertruhe
CN109387018B (zh) * 2017-08-04 2020-12-15 青岛海尔特种电冰柜有限公司 具有自动除霜功能的制冷设备及其除霜控制方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1908248A (en) * 1927-12-22 1933-05-09 Frigidaire Corp Refrigerating apparatus
US2010259A (en) * 1933-02-02 1935-08-06 Nathan F Fretter Means for defrosting refrigerating units
US2604760A (en) * 1950-04-29 1952-07-29 Gen Electric Moisture collecting and removing arrangement
SE467801B (sv) 1991-01-10 1992-09-14 Electrolux Ab Frysmoebel med anordning att hindra att frost bildas
ATE210268T1 (de) * 1996-05-03 2001-12-15 Liebherr Werk Lienz Ges Mbh Kühl- und/oder gefriergerät
US20060086121A1 (en) * 2002-02-11 2006-04-27 Wiggs B R Capillary tube/plate refrigerant/air heat exchanger for use in conjunction with a method and apparatus for inhibiting ice accumulation in HVAC systems
EP1845321B1 (de) * 2006-01-30 2017-07-26 Whirlpool Corporation Kühlschrank mit Feuchtigkeitsabsorbierendem Gerät

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
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