EP0787961A2 - Vorrichtung zum Festellen von Eisbildung und zum Entfernen des Eises mittels Erhitzung, insbesondere für Haushaltskühlschrank-Verdampfer - Google Patents

Vorrichtung zum Festellen von Eisbildung und zum Entfernen des Eises mittels Erhitzung, insbesondere für Haushaltskühlschrank-Verdampfer Download PDF

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Publication number
EP0787961A2
EP0787961A2 EP97100406A EP97100406A EP0787961A2 EP 0787961 A2 EP0787961 A2 EP 0787961A2 EP 97100406 A EP97100406 A EP 97100406A EP 97100406 A EP97100406 A EP 97100406A EP 0787961 A2 EP0787961 A2 EP 0787961A2
Authority
EP
European Patent Office
Prior art keywords
frost
evaporator
defrosting
microprocessor
capacitor
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
EP97100406A
Other languages
English (en)
French (fr)
Other versions
EP0787961A3 (de
Inventor
Daniel C/O Whirlpool Europe S.R.L. Turetta
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 Europe BV
Original Assignee
Whirlpool Europe BV
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 Europe BV filed Critical Whirlpool Europe BV
Publication of EP0787961A2 publication Critical patent/EP0787961A2/de
Publication of EP0787961A3 publication Critical patent/EP0787961A3/de
Ceased 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/02—Detecting the presence 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
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/11—Sensor to detect if defrost is necessary

Definitions

  • This invention relates to a device for detecting frost formation and/or for eliminating it by heating, particularly for domestic refrigerator evaporators.
  • Refrigerators are also known in which thermal defrosting is effected cyclically, ie independently of the quantity of frost which has formed on the evaporator. This arrangement has the drawback of consuming electricity even when defrosting is not necessary.
  • An object of the present invention is to provide a single means which performs both the frost detection and heating functions.
  • a further object of the present invention is to provide a device which both monitors and eliminates frost using the same means.
  • the reference numeral 1 indicates a support of flexible insulating material, such as polyamide.
  • a suitable material is that known commercially as KAPTON or MYLAR (or the like) manufactured for example by DU PONT and 3M.
  • Two physically separate resistive tracks extending mutually parallel in a substantially castellated arrangement are applied by known methods to said support.
  • the trackless face of the support 1 carrying the tracks A and B is in contact with a plastic wall 2 bounding the refrigerator preservation compartment 3, its opposite face being in contact with a conventional evaporator 4 of the refrigerator refrigeration circuit.
  • the reference numeral 5 indicates an external wall of the refrigerator and 5A indicates the refrigerator thermal insulation, for example polyurethane expanded in situ, which joins together the various described components.
  • the support 1 Before expanding the polyurethane in situ the support 1 is for example fixed to the evaporator with biadhesive tape at points on or along its periphery, the ends of the resistive tracks A and B are electrically connected, as shown in Figures 3 and 4, in the following manner.
  • the end A1 is electrically connected to a contactor means 6 in the form of a switching means operated and controlled by a microprocessor ⁇ P.
  • the end B1 is connected to earth.
  • the ends A2 and B2 are connected to a contactor means 7, the purpose of which is to connect said ends together or disconnect them from each other, and is operated and controlled by the microprocessor ⁇ P.
  • the contactor means 6 connects the end A1 either to a voltage source, for example at 24V, or to a node 8 to which there are connected a resistor R (connected to a voltage source at 5V) and a variable frequency oscillator OSC suitably connected to a conventional ammeter 9 feeding its signal to the microprocessor ⁇ P which processes it in known manner.
  • a voltage source for example at 24V
  • a resistor R connected to a voltage source at 5V
  • OSC suitably connected to a conventional ammeter 9 feeding its signal to the microprocessor ⁇ P which processes it in known manner.
  • the resistive tracks A and B act as the plates of a capacitor when the contactor means (6, 7) are in the position shown in Figure 4, ie during normal refrigerator operation, in which said plates define a frost detection capacitor.
  • This capacitor has a certain capacitance when frost is absent from the evaporator and a different capacitance as the layer of frost grows.
  • the ammeter 9 feeds differing signal values to the microprocessor ⁇ P.
  • the microprocessor switches the contactor means (6, 7) into the position shown in Figure 3 in which the two tracks A and B are connected in series between the source and earth.
  • the capacitor of Figure 4 is transformed into an electrical resistance heater by virtue of the resistivity of the tracks.
  • the "resistor" configuration of Figure 3 varies cyclically.
  • the microprocessor ⁇ P switches the contactor means (6, 7) alternately into the position shown in Figure 4 and that shown in Figure 3, so as to monitor the progress of defrosting via the ammeter 9.

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)
  • Emergency Lowering Means (AREA)
EP97100406A 1996-01-30 1997-01-13 Vorrichtung zum Festellen von Eisbildung und zum Entfernen des Eises mittels Erhitzung, insbesondere für Haushaltskühlschrank-Verdampfer Ceased EP0787961A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI960073U 1996-01-30
ITMI960073 IT240417Y1 (it) 1996-01-30 1996-01-30 Dispositivo per rilevare la formazione di brina e per eliminarlaper riscaldamento particolarmente per evaporatori di frigoriferi

Publications (2)

Publication Number Publication Date
EP0787961A2 true EP0787961A2 (de) 1997-08-06
EP0787961A3 EP0787961A3 (de) 1998-07-22

Family

ID=11372936

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97100406A Ceased EP0787961A3 (de) 1996-01-30 1997-01-13 Vorrichtung zum Festellen von Eisbildung und zum Entfernen des Eises mittels Erhitzung, insbesondere für Haushaltskühlschrank-Verdampfer

Country Status (2)

Country Link
EP (1) EP0787961A3 (de)
IT (1) IT240417Y1 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1004835A3 (de) * 1998-11-27 2001-04-25 Whirlpool Corporation Vorrichtung zum schnellen Abtauen eines Kühlschrankfaches, wie ein Gefrierfach oder dergleichen
EP1726895A1 (de) * 2005-05-27 2006-11-29 Giuseppe Floris Frostschutzvorrichtung für Kältegerät
WO2012010424A1 (de) * 2010-07-23 2012-01-26 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit abtaueinrichtung
EP2634512A1 (de) * 2012-02-28 2013-09-04 LG Electronics, Inc. Klimaanlage und Steuerverfahren dafür
ITUD20130108A1 (it) * 2013-08-13 2015-02-14 New Technology Consultants N T C Dispositivo di controllo del funzionamento di uno scambiatore di calore, scambiatore di calore comprendente detto dispositivo e relativo procedimento di controllo
EP2865953A1 (de) * 2013-10-24 2015-04-29 Samsung Electronics Co., Ltd Klimaanlage und Steuerverfahren dafür
US20160025403A1 (en) * 2014-07-28 2016-01-28 Infineon Technologies Austria Ag Temperature regulating system and method of deicing the temperature regulating system
WO2016062535A1 (de) * 2014-10-21 2016-04-28 BSH Hausgeräte GmbH Haushaltskältegerät mit einem reiferkennungssensor, welcher zur erfassung einer reifbildung an einem verdampfer einer kälteerzeugungsvorrichtung des haushaltskältegeräts ausgebildet ist
CN108007050A (zh) * 2017-11-21 2018-05-08 合肥美的电冰箱有限公司 冰箱的化霜控制方法、冰箱及计算机可读存储介质
US10759326B2 (en) 2016-05-27 2020-09-01 Carrier Corporation Method for determining reduced airflow in transport refrigeration system
CN113574796A (zh) * 2019-04-25 2021-10-29 Ｎｉｓｓｈａ株式会社 带有融雪加热器的光收发模块

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4347709A (en) * 1981-01-19 1982-09-07 Honeywell Inc. Demand defrost sensor
IT1255045B (it) * 1992-03-31 1995-10-17 Whirlpool Italia Metodo e dispositivo per rilevare e controllare la formazione di brina su un evaporatore di un refrigeratore
EP0644386B1 (de) * 1993-09-22 1998-02-25 Whirlpool Europe B.V. Verfahren zur dynamischen Kontrolle der Eisbildung an einem Kühlschrankverdampfer und Kühlschrank in dem das Verfahren angewandt ist

Non-Patent Citations (1)

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

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1004835A3 (de) * 1998-11-27 2001-04-25 Whirlpool Corporation Vorrichtung zum schnellen Abtauen eines Kühlschrankfaches, wie ein Gefrierfach oder dergleichen
EP1726895A1 (de) * 2005-05-27 2006-11-29 Giuseppe Floris Frostschutzvorrichtung für Kältegerät
WO2012010424A1 (de) * 2010-07-23 2012-01-26 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit abtaueinrichtung
EP2634512A1 (de) * 2012-02-28 2013-09-04 LG Electronics, Inc. Klimaanlage und Steuerverfahren dafür
US9429352B2 (en) 2012-02-28 2016-08-30 Lg Electronics Inc. Air conditioner and method of controlling the same
ITUD20130108A1 (it) * 2013-08-13 2015-02-14 New Technology Consultants N T C Dispositivo di controllo del funzionamento di uno scambiatore di calore, scambiatore di calore comprendente detto dispositivo e relativo procedimento di controllo
WO2015022638A1 (en) 2013-08-13 2015-02-19 New Technology Consultants (N.T.C.) Device to control the functioning of a heat exchanger, heat exchanger comprising said device and corresponding control method based on the measurement of an electromagnetic field
US9784496B2 (en) 2013-10-24 2017-10-10 Samsung Electronics Co., Ltd. Air conditioner and method of controlling the same
EP2865953A1 (de) * 2013-10-24 2015-04-29 Samsung Electronics Co., Ltd Klimaanlage und Steuerverfahren dafür
CN104566639A (zh) * 2013-10-24 2015-04-29 三星电子株式会社 空调以及控制该空调的方法
CN104566639B (zh) * 2013-10-24 2019-08-20 三星电子株式会社 空调以及控制该空调的方法
US20160025403A1 (en) * 2014-07-28 2016-01-28 Infineon Technologies Austria Ag Temperature regulating system and method of deicing the temperature regulating system
WO2016062535A1 (de) * 2014-10-21 2016-04-28 BSH Hausgeräte GmbH Haushaltskältegerät mit einem reiferkennungssensor, welcher zur erfassung einer reifbildung an einem verdampfer einer kälteerzeugungsvorrichtung des haushaltskältegeräts ausgebildet ist
US10759326B2 (en) 2016-05-27 2020-09-01 Carrier Corporation Method for determining reduced airflow in transport refrigeration system
CN108007050A (zh) * 2017-11-21 2018-05-08 合肥美的电冰箱有限公司 冰箱的化霜控制方法、冰箱及计算机可读存储介质
CN108007050B (zh) * 2017-11-21 2020-04-03 合肥美的电冰箱有限公司 冰箱的化霜控制方法、冰箱及计算机可读存储介质
CN113574796A (zh) * 2019-04-25 2021-10-29 Ｎｉｓｓｈａ株式会社 带有融雪加热器的光收发模块

Also Published As

Publication number Publication date
ITMI960073U1 (it) 1997-07-30
ITMI960073V0 (it) 1996-01-30
IT240417Y1 (it) 2001-04-02
EP0787961A3 (de) 1998-07-22

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