EP0547398B1 - Kühlgerät, insb. mit Umluft betriebene Kühl- und Gefrier-Kombination für Haushaltszwecke - Google Patents

Kühlgerät, insb. mit Umluft betriebene Kühl- und Gefrier-Kombination für Haushaltszwecke Download PDF

Info

Publication number
EP0547398B1
EP0547398B1 EP92119828A EP92119828A EP0547398B1 EP 0547398 B1 EP0547398 B1 EP 0547398B1 EP 92119828 A EP92119828 A EP 92119828A EP 92119828 A EP92119828 A EP 92119828A EP 0547398 B1 EP0547398 B1 EP 0547398B1
Authority
EP
European Patent Office
Prior art keywords
temperature
temperature sensor
defrosting operation
refrigerator according
detects
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.)
Expired - Lifetime
Application number
EP92119828A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0547398A2 (de
EP0547398A3 (en
Inventor
Rolf Kordon
Georg Dipl.-Ing. Strauss (Fh)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0547398A2 publication Critical patent/EP0547398A2/de
Publication of EP0547398A3 publication Critical patent/EP0547398A3/de
Application granted granted Critical
Publication of EP0547398B1 publication Critical patent/EP0547398B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/008—Alarm devices
    • 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
    • F25D21/002—Defroster control

Definitions

  • the invention relates to a refrigerator, in particular with a convection-operated refrigerator and freezer combination for household purposes, with a freezer compartment and a refrigerator, which is equipped with at least one heat exchanger designed as an evaporator, which is defrosted from time to time and which also has at least one air temperature temperature sensor in the freezer compartment, which indicates a prevailing, inadmissibly high temperature above the permissible temperature threshold by triggering a warning signal on a warning device, the triggering of the warning signal being suppressed for a period of time which at least lasts the defrosting process.
  • a cooling device is known from US-A-3 311 906.
  • the trigger criterion for the cyclically initiated defrosting processes is the runtime of the refrigerant compressor or fixed time intervals which are based on empirically determined time values that require defrosting.
  • the thermostat that detects the temperature of the heated refrigerant responds, which energizes the relay.
  • the relay then opens the switch between the air temperature sensing thermostat and the warning device, so that the circuit to the warning device is interrupted.
  • a temperature monitor with electronic components, which is equipped with a warning device and detects the air temperature in a refrigerator compartment, and which allows the warning signal to be suppressed at least for a period of time that persists during the defrosting process and its input and output signals can be prepared by an electronic evaluation circuit.
  • the solution according to the invention has the advantage that it is ensured with simple means that the warning signal is not triggered for a period of time that persists in the defrosting process and thereby prevents an operator of the cooling device from reacting incorrectly due to an unnecessarily triggered alarm; what for this could mean cost and effort. Simultaneously with the suppression of the warning signal, it is achieved that the electronic evaluation circuit does not get into an undefined switching state for it.
  • This solution also has the advantage that the essential data required for monitoring the cooling device can be processed digitally.
  • a temperature value can be simulated extremely inexpensively and nevertheless with sufficient accuracy if, according to a further preferred embodiment of the object of the invention, it is provided that the simulated temperature value is realized by an ohmic resistance with an essentially temperature-independent resistance value. Furthermore, this solution has the advantage that even existing temperature monitoring with electronic components can be extended to the warning signal suppression without great circuitry.
  • a particularly simple but reliable circuit for suppressing the warning signal is obtained if, according to a next advantageous embodiment of the subject of the invention, it is provided that the ohmic resistance and the temperature sensor are connected in parallel in a circuit are arranged, in this circuit a switch is provided which automatically switches from the temperature sensor to the ohmic resistance at the beginning of the defrosting process.
  • the changeover switch is controlled by a relay.
  • the relay to which a time delay circuit is assigned, automatically switches the changeover switch back to the temperature sensor that detects the temperature of the cooling air after the end of the defrosting process and an additional period of time, as a result of which the warning device functions again is set.
  • This solution has the advantage that, regardless of the care taken by an operator of the cooling device, the warning device is in operation again after the defrosting process, so that a malfunction in cooling operation is signaled again.
  • the relay switches the switch after defrosting and thermal feedback automatically switches back to the temperature sensor that detects the temperature of the cooling air, as a result of which the warning device is activated again.
  • the temperature sensor which detects the temperature of the cooling air is designed as a thermistor and is arranged in the suction-side air flow of a fan.
  • Such a solution has the advantage that the temperature of the cooling air is determined by simple circuitry measures with relatively high accuracy, the precise temperature detection is additionally supported by the uniform application of cooling air to the sensor due to its arrangement on the suction side of the fan.
  • the resistance-temperature characteristic of the thermistor can be easily adapted to certain conditions.
  • FIGS. 1 and 2 a cabinet-type household fridge-freezer combination operated with circulating air is shown, which has two cooling compartments arranged one above the other in a common housing 11, each of which can be closed with its own door 12 or 13.
  • the upper, larger, designed as a normal cooling compartment 14 and provided with several stacked shelves 15 cooling compartment is separated by a thermally insulating partition 16 from the underlying serving as a freezer compartment 17 cooling compartment.
  • the freezer compartment 17 is equipped with a stepped rear wall 18, the step 19 formed as a step protrudes into the interior of the freezer compartment 17 and thereby saves a niche outside the compartment, which includes the inclusion of a schematically indicated, belonging to the refrigerator and freezer 10 refrigerator Refrigerant compressor 20 is used.
  • a space divider serving as a cover 21 is arranged in the interior of the freezer compartment 17 above the shoulder 19 and runs parallel to it at a distance from the rear wall 18.
  • the part lying in front of the cover 17 and facing the door 13 of the freezer compartment 17 is arranged one above the other with pull-outs arranged containers 22 for receiving goods to be stored there, while the other part, which is separated toward the rear wall 18, receives an evaporator 23 designed as a lamella evaporator, which is arranged below a fan 24 designed as an axial fan.
  • the fan 24 which forcibly circulates the cooling air in order to maintain the most uniform possible temperature distribution in the freezer compartment 17 and conveys it via the evaporator 23 is arranged in such a way that the suction-side air flow sweeps over the heat exchange surfaces of the evaporator 23 which are designed as fins.
  • the air temperature in the freezer compartment 17 is detected by a temperature sensor 25, which is also located in the suction-side air flow of the fan 24 and changes its resistance value as a function of the temperature, designed as a thermistor, which - symbolically indicated - is arranged in the bottom region of the freezer compartment 17 at the transition to paragraph 19 is.
  • the temperature sensor 25 is electrically connected to an electronic evaluation circuit, not shown, which processes and evaluates a temperature detected by the temperature sensor 25.
  • the electronic evaluation circuit triggers a warning signal.
  • this is suppressed automatically from time to time for the defrosting processes of the evaporator 23, for a period of time that at least lasts for the defrosting process from the start of the defrosting process, by a simulated temperature value below the permissible temperature threshold for the electronic evaluation circuit.
  • the simulated temperature value is realized electrically by means of an ohmic resistor 27 arranged in a circuit 26 with an essentially temperature-independent resistance value.
  • the circuit 26 represents a circuit section belonging to an electrical evaluation circuit, the interfaces of which to this evaluation circuit are symbolically indicated by circles arranged on a dash-dotted line, the interfaces A, B and C, for example, denoting such interfaces.
  • the temperature sensor 25 designed as a thermistor is arranged in parallel with the ohmic resistor 27. Both the ohmic resistor 27 and the temperature sensor 25 can optionally be switched into the circuit 26 by a switch 29 operated by a relay 28, the switch 29 controlled by the relay 28 automatically switching from the temperature sensor 25 to the ohmic resistor 27 at the beginning of the defrosting process .
  • the current for the relay 28, which is designed as a direct current relay, is generated by a power supply unit 31, which is arranged in a second circuit 30 and is equipped with a rectifier and also supplies the electronic evaluation circuit with current.
  • the circuit 30, which is otherwise not explained in more detail, essentially serves, depending on the operating state of the cooling device, to supply either the heating provided for supporting the defrosting process or the refrigerant compressor with mains voltage.
  • the relay 28 switches the changeover switch 29 automatically returns from the ohmic resistor 27 to the temperature sensor 25 which detects the temperature of the cooling air, so that the warning device is in operation again.
  • a PTC thermistor can also be provided instead of the thermistor for use as a temperature sensor, with appropriate adaptation of the electronic evaluation circuit.

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)
EP92119828A 1991-12-19 1992-11-20 Kühlgerät, insb. mit Umluft betriebene Kühl- und Gefrier-Kombination für Haushaltszwecke Expired - Lifetime EP0547398B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9115777U DE9115777U1 (de) 1991-12-19 1991-12-19 Kühlgerät, insbesondere mit Umluft betriebene Kühl- und Gefrier-Kombination für Haushaltszwecke
DE9115777U 1991-12-19

Publications (3)

Publication Number Publication Date
EP0547398A2 EP0547398A2 (de) 1993-06-23
EP0547398A3 EP0547398A3 (en) 1993-11-24
EP0547398B1 true EP0547398B1 (de) 1996-01-24

Family

ID=6874412

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92119828A Expired - Lifetime EP0547398B1 (de) 1991-12-19 1992-11-20 Kühlgerät, insb. mit Umluft betriebene Kühl- und Gefrier-Kombination für Haushaltszwecke

Country Status (3)

Country Link
EP (1) EP0547398B1 (sv)
DE (2) DE9115777U1 (sv)
ES (1) ES2084249T3 (sv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110940135A (zh) * 2019-12-09 2020-03-31 珠海格力电器股份有限公司 冰箱及其化霜检测装置和化霜控制方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013107428A1 (de) * 2013-07-12 2015-01-15 Dbk David + Baader Gmbh Schaltung für einen Verdunster und Verdunster
CN104535345B (zh) * 2014-12-11 2016-10-19 青岛大学 一种冰箱蒸发器及其模块性能测试系统及方法
DE102016014797A1 (de) * 2016-12-12 2018-06-14 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3311906A (en) * 1964-08-17 1967-03-28 Ref Con Corp Refrigerator monitoring system
DE1266769B (de) * 1965-07-01 1968-04-25 Siemens Elektrogeraete Gmbh Zeitgeber fuer die Abtauautomatik elektrischer Kuehlgeraete
DE1949970A1 (de) * 1969-10-03 1971-04-29 May And Robertson Stevenage Lt Alarmvorrichtung fuer Kuehlanlagen
DE2610571C2 (de) * 1976-03-12 1978-05-03 Siemens Ag, 1000 Berlin Und 8000 Muenchen Überwachungseinrichtung für Kühlbehälter, insbesondere Kühlcontainer
GB1545594A (en) * 1977-09-07 1979-05-10 Fogden & Co Ltd M Temperature monitoring
GB2031631A (en) * 1978-10-16 1980-04-23 Shew A Refrigerator temperature monitor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110940135A (zh) * 2019-12-09 2020-03-31 珠海格力电器股份有限公司 冰箱及其化霜检测装置和化霜控制方法

Also Published As

Publication number Publication date
EP0547398A2 (de) 1993-06-23
DE59205171D1 (de) 1996-03-07
ES2084249T3 (es) 1996-05-01
DE9115777U1 (de) 1992-02-27
EP0547398A3 (en) 1993-11-24

Similar Documents

Publication Publication Date Title
EP2218987B1 (de) Kältegerät mit Flaschenkühlfunktion
EP0547398B1 (de) Kühlgerät, insb. mit Umluft betriebene Kühl- und Gefrier-Kombination für Haushaltszwecke
EP3759405B1 (de) Kältegerät und verfahren zum betreiben eines kältegeräts
DE2539914C2 (de) Kühlmöbel, insbesondere Zweitemperaturen-Kühlschrank
EP0602379B1 (de) Kühlgerät, insbesondere Mehrtemperaturen-Kühlgerät
WO2003098134A1 (de) Gefriergerät mit abtaufunktion und betriebsverfahren dafür
DE69107789T2 (de) Kühlgerät mit nur einer thermostatischen Temperaturregelvorrichtung.
DE2917721A1 (de) Gefrierkuehlschrank
DE102006061155A1 (de) Kältegerät
DE2623879C2 (de) Kühlmöbel, insbesondere Zweitemperaturen-Kühlschrank
DE4141470C2 (de) Kühlgerät
US3081608A (en) Frozen food compartment for domestic refrigerator
DE102012206806A1 (de) Einkreis-Kältegerät und Betriebsverfahren dafür
DE3810655A1 (de) Zusatzeinrichtung fuer kuehlschraenke mit gefrierfach
DE69000509T2 (de) Kuehlgeraet mit nur einer thermostatischen temperaturregelvorrichtung.
EP1175586B1 (de) Kühlgerät
EP0703421A2 (de) Kühlmöbel mit wenigstens zwei Fächern unterschiedlicher Temperatur
DE2742403C2 (de) Kühleinrichtung
DE1946259B2 (de) Kuehlmoebel, insbesondere kuehltruhe
DE2433331A1 (de) Kuehlmoebel, insbesondere zweitemperaturen-kuehlschrank, mit einem einzigen motorkompressoraggregat
DE60013374T2 (de) Automatisches Kältegerät mit Abtausteuerung
EP3561418B1 (de) Haushaltskältegerät mit einem gefrierraum und betreiben eines einen gefrierraum aufweisenden haushaltskältegerätes
DE29707866U1 (de) Kühlgerät
DE102008052952A1 (de) Kühl- und/oder Gefriergerät
DE69616026T2 (de) Abtausteuerung für ein Kühlsystem, wobei die Bestimmung der Umgebungstemperatur verwendet wird

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE ES FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES FR GB IT

17P Request for examination filed

Effective date: 19940511

17Q First examination report despatched

Effective date: 19941012

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19960125

REF Corresponds to:

Ref document number: 59205171

Country of ref document: DE

Date of ref document: 19960307

ET Fr: translation filed
ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2084249

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20101130

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20101123

Year of fee payment: 19

Ref country code: IT

Payment date: 20101124

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20111125

Year of fee payment: 20

Ref country code: ES

Payment date: 20111123

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59205171

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59205171

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20121119

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20121119

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20130717

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20121121