EP0971187A1 - Refrigerator with sensor for recording the opening of the door - Google Patents

Refrigerator with sensor for recording the opening of the door Download PDF

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Publication number
EP0971187A1
EP0971187A1 EP99112125A EP99112125A EP0971187A1 EP 0971187 A1 EP0971187 A1 EP 0971187A1 EP 99112125 A EP99112125 A EP 99112125A EP 99112125 A EP99112125 A EP 99112125A EP 0971187 A1 EP0971187 A1 EP 0971187A1
Authority
EP
European Patent Office
Prior art keywords
door
wall
cooling device
opening
door seal
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Withdrawn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
EP99112125A
Other languages
German (de)
French (fr)
Inventor
Herbert Gerner
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.)
Liebherr Hausgeraete Ochsenhausen GmbH
Liebherr Hausgeraete GmbH
Original Assignee
Liebherr Hausgeraete Ochsenhausen GmbH
Liebherr Hausgeraete GmbH
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
Priority claimed from DE29814242U external-priority patent/DE29814242U1/en
Application filed by Liebherr Hausgeraete Ochsenhausen GmbH, Liebherr Hausgeraete GmbH filed Critical Liebherr Hausgeraete Ochsenhausen GmbH
Publication of EP0971187A1 publication Critical patent/EP0971187A1/en
Withdrawn legal-status Critical Current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
    • 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
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/028—Details
    • 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
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/02—Sensors detecting door opening

Definitions

  • the invention relates to a refrigerator for cooling and / or freezing goods at least one refrigerator, which can be closed by a door and with one the door surrounding door seal, which has magnetic properties.
  • the outer wall of the cooling space points at least along the course a metal sheet on the adjacent door seal, so that the door seal at closed door due to the magnetic properties on the metal sheet is present.
  • reed switches are known that are used in conjunction with one on the door attached additional magnets know the opening state of the door.
  • the object of the invention is therefore to provide a cooling device mentioned at the outset, that allows easy detection of the door opening.
  • the invention Solution is that at one point on the outer wall of the Cold room in the area of the door seal abutting the outer wall Hall sensor is arranged.
  • the invention is based on the knowledge that the Door seal for closing the door usually has magnetic properties anyway having. These magnetic properties can be exploited to detect the opening condition of the door by means of a Hall sensor.
  • the Hall sensor is based on the well-known principle that in a plate that in A current flows through it in the longitudinal direction and at the same time perpendicular to it Surface penetrated by a magnetic field between the side connections a Hall voltage arises from the plate. This Hall voltage can be used Detection of the opening status can be evaluated, as this changes when opening the door due to the change in the magnetic field generated by the door opening also changes.
  • the advantages of the invention consist essentially in that when the Mechanical switching elements can be dispensed with when the door is open can, so that the refrigerator can be designed maintenance-free overall.
  • the Hall sensor also has a small design, so that it is easy on a place of the metal sheet in the area of the door seal can be introduced.
  • Another advantage of the invention is that a very small door gap can be recognized as an open door.
  • the Hall sensor on the outer wall opposite the door hinge is arranged.
  • the door seal itself can be designed such that in the A magnetic strip is embedded in the door seal.
  • the Hall sensor is expedient arranged directly in the area of the magnetic strip with the door closed. Another possibility is that the door seal is made of an elastic Material exists that already has a magnetization.
  • the figure shows a section through a refrigerator door 1 and an outer wall of the refrigerator compartment 2, which is opposite the door hinge of the door 1.
  • the door 1 and the Outer wall 2 are foamed in the usual way with an insulating layer.
  • the inside of the door 1 and the outer wall 2 are made of a plastic layer 7, 8 lined.
  • the door 1 has a seal 3 on its outer edge, in a magnetic stripe 4 is embedded.
  • the door is in the closed state Magnetic strip 4 on a metal sheet 6 with which the outer region of the wall is covered and which is folded in the area of the magnetic strip 4.
  • At a A Hall sensor 5 is embedded in the place of the metal sheet Door faces the magnetic stripe.
  • the Hall voltage occurring at the Hall sensor is evaluated by an electronic circuit, not shown. When the door is opened, the Hall voltage changes, so that the Opening status of the door can be recognized.

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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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The arrangement includes at least one cold-storage locker which is lockable through a door, and a sealing arrangement with magnetic properties surrounding the door. A reverberation sensor is arranged at a position of an outer wall of the cold-storage locker, in the area of the door seal adjacent the outer wall. The reverberation sensor is preferably arranged at the outer wall, opposite the door hinge. A magnetic strip may be embedded in the door seal, or the door seal may consist of a magnetic material.

Description

Die Erfindung betrifft ein Kühlgerät zum Kühlen und/oder Gefrieren von Waren mit mindestens einem Kühlraum, der durch eine Tür verschließbar ist und mit einer an der Tür umlaufenden Türdichtung, die magnetische Eigenschaften aufweist. In der Regel weist dabei die Außenwandung des Kühlraums zumindest entlang des Verlaufs der anliegenden Türdichtung ein Metallblech auf, so daß die Türdichtung bei geschlossener Tür aufgrund der magnetischen Eigenschaften an dem Metallblech anliegt.The invention relates to a refrigerator for cooling and / or freezing goods at least one refrigerator, which can be closed by a door and with one the door surrounding door seal, which has magnetic properties. In the As a rule, the outer wall of the cooling space points at least along the course a metal sheet on the adjacent door seal, so that the door seal at closed door due to the magnetic properties on the metal sheet is present.

Grundsätzlich stellt sich bei einem derartigen Kühlgerät mit einer Tür das Problem, den Öffnungszustand zu erkennen, um damit eine Innenbeleuchtung des Kühlraums anzusteuern oder auch um einen Alarm auszulösen, sobald die Tür über eine vorgegebene Höchstzeit geöffnet ist. Bekannt sind Schalter mit einem Betätigungsstößel, der bei geschlossener Tür eingedrückt wird und der bei geöffneter Tür aufgrund einer Federvorspannung in eine andere Schaltstellung versetzt wird. Ein Nachteil dieser mechanischen Schalter mit Betätigungsstößel besteht allerdings darin, daß diese derart verschmutzen können, daß der Betätigungsstößel aufgrund der Federverspannung nicht mehr selbsttätig in die andere Schaltstellung gelangt. The basic problem with such a cooling device with a door is that to recognize the opening status, so that an interior lighting of the refrigerator compartment to control or to trigger an alarm as soon as the door over a predetermined maximum time is open. Switches with an actuating plunger are known, which is pushed in with the door closed and the one with the door open due to a spring preload in a different switching position. On However, there is a disadvantage of this mechanical switch with actuating plunger in that they can become so dirty that the actuating plunger is due to the spring tension no longer automatically reaches the other switching position.

Ein weiterer Nachteil derartiger Schalter besteht darin, daß in der inneren Gehäusewandung eine zusätzliche Aussparung für den Schalter vorgesehen sein muß.Another disadvantage of such switches is that in the inner housing wall an additional recess for the switch must be provided.

Desweiteren sind Reedschalter bekannt, die in Verbindung mit einem auf der Tür angebrachten zusätzlichen Magneten den Öffnungszustand der Türe kennen.Furthermore, reed switches are known that are used in conjunction with one on the door attached additional magnets know the opening state of the door.

Nachteil dieser Anordnung ist der zusätzlich erforderliche Magnet, da das Magnetfeld der Türdichtung zur Betätigung des Reedschalters nicht ausreicht.The disadvantage of this arrangement is the additionally required magnet, since the magnetic field the door seal is not sufficient to operate the reed switch.

Aufgabe der Erfindung ist es daher, ein eingangs genanntes Kühlgerät zu schaffen, das eine einfache Erkennung der Türöffnung erlaubt.The object of the invention is therefore to provide a cooling device mentioned at the outset, that allows easy detection of the door opening.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Die erfindungsgemäße Lösung besteht darin, daß an einer Stelle der Außenwandung des Kühlraums im Bereich der an die Außenwandung anstoßenden Türdichtung ein Hall-Sensor angeordnet ist. Die Erfindung beruht dabei auf der Erkenntnis, daß die Türdichtung zum Schließen der Tür ohnehin üblicherweise magnetische Eigenschaften aufweist. Diese magnetischen Eigenschaften können ausgenutzt werden, um durch einen Hall-Sensor den Öffnungszustand der Tür zu erkennen. Der Hall-Sensor beruht dabei auf dem bekannten Prinzip, daß bei einem Plättchen, das in Längsrichtung von einem Strom durchflossen wird und gleichzeitig senkrecht zur Fläche von einem Magnetfeld durchsetzt wird, zwischen den seitlichen Anschlüssen des Plättchens eine Hall-Spannung entsteht. Diese Hall-Spannung kann zur Erkennung des Öffnungszustandes ausgewertet werden, da sich diese bei Öffnung der Tür aufgrund der Änderung des durch die Türöffnung erzeugten Magnetfeldes ebenfalls ändert.This object is achieved by the features of patent claim 1. The invention Solution is that at one point on the outer wall of the Cold room in the area of the door seal abutting the outer wall Hall sensor is arranged. The invention is based on the knowledge that the Door seal for closing the door usually has magnetic properties anyway having. These magnetic properties can be exploited to detect the opening condition of the door by means of a Hall sensor. The Hall sensor is based on the well-known principle that in a plate that in A current flows through it in the longitudinal direction and at the same time perpendicular to it Surface penetrated by a magnetic field between the side connections a Hall voltage arises from the plate. This Hall voltage can be used Detection of the opening status can be evaluated, as this changes when opening the door due to the change in the magnetic field generated by the door opening also changes.

Die Vorteile der Erfindung bestehen im wesentlichen darin, daß bei Erkennung des Öffnungszustandes der Tür auf mechanische Schaltelemente verzichtet werden kann, so daß der Kühlschrank insgesamt wartungsfrei ausgestaltet werden kann. Der Hall-Sensor weist außerdem eine kleine Bauform auf, so daß dieser leicht an einer Stelle des Metallblechs im Bereich der Türdichtung eingebracht werden kann. The advantages of the invention consist essentially in that when the Mechanical switching elements can be dispensed with when the door is open can, so that the refrigerator can be designed maintenance-free overall. The Hall sensor also has a small design, so that it is easy on a place of the metal sheet in the area of the door seal can be introduced.

Ein weiterer Vorteil der Erfindung besteht darin, daß bereits ein sehr geringer Türspalt als geöffnete Tür erkannt werden kann.Another advantage of the invention is that a very small door gap can be recognized as an open door.

Nach einer bevorzugten Ausführungsform ist vorgesehen, daß der Hall-Sensor an der dem Türscharnier gegenüberliegenden Außenwandung angeordnet ist. An dieser Stelle ergibt sich die größte Änderung des Magnetfeldes gegenüber der Außenwandung des Kühlraums, da sich die Tür gegenüber dieser Außenwandung am meisten entfernt. Die Türdichtung selber kann derart ausgestaltet sein, daß in die Türdichtung ein Magnetstreifen eingebettet ist. Zweckmäßigerweise ist der Hall-Sensor dabei direkt im Bereich des Magnetstreifens bei geschlossener Tür angeordnet. Eine andere Möglichkeit besteht darin, daß die Türdichtung aus einem elastischen Material besteht, das bereits eine Magnetisierung aufweist.According to a preferred embodiment it is provided that the Hall sensor on the outer wall opposite the door hinge is arranged. At this The largest change in the magnetic field compared to the outer wall of the cold room, since the door faces this outer wall most removed. The door seal itself can be designed such that in the A magnetic strip is embedded in the door seal. The Hall sensor is expedient arranged directly in the area of the magnetic strip with the door closed. Another possibility is that the door seal is made of an elastic Material exists that already has a magnetization.

Nach einer weiteren bevorzugten Ausführungsform ist vorgesehen, daß mit der elektronischen Schaltung zur Erfassung der Türöffnung die Innenbeleuchtung des Türraums angesteuert wird. Zusätzlich kann vorgesehen sein, daß durch die Schaltung ein Alarm ausgelöst wird, sobald die Tür über eine vorgegebene Höchstzeit geöffnet ist.According to a further preferred embodiment it is provided that with the electronic circuit for detecting the door opening the interior lighting of the Door room is controlled. In addition, it can be provided that Circuit an alarm is triggered as soon as the door exceeds a predetermined maximum time is open.

Weitere Einzelheiten und Vorteile der Erfindung werden anhand eines in der Zeichnung dargestellten Ausführungsbeispiels erläutert, die aus einer Figur besteht.Further details and advantages of the invention are described in the drawing illustrated embodiment explained, which consists of a figure.

Die Figur zeigt einen Schnitt durch eine Kühlschranktür 1 und eine Außenwandung des Kühlraums 2, die dem Türscharnier der Tür 1 gegenüberliegt. Die Tür 1 und die Außenwandung 2 sind in üblicher Weise mit einer Isolierschicht ausgeschäumt. Im Innenbereich sind die Tür 1 bzw. die Außenwandung 2 durch eine Kunststoffschicht 7, 8 ausgekleidet. Die Tür 1 weist an ihrem äußeren Rand eine Dichtung 3 auf, in die ein Magnetstreifen 4 eingebettet ist. Im geschlossenen Zustand der Tür liegt der Magnetstreifen 4 an einem Metallblech 6 an, mit dem der Außenbereich der Wandung verkleidet ist und das im Bereich des Magnetstreifens 4 gefalzt ist. An einer Stelle des Metallblechs ist ein Hall-Sensor 5 eingelassen, der bei geschlossener Tür dem Magnetstreifen gegenüberliegt. Die an dem Hall-Sensor auftretende Hall-Spannung wird durch eine nicht näher dargestellte elektronische Schaltung ausgewertet. Beim Öffnen der Tür ändert sich die Hall-Spannung, so daß hierdurch der Öffnungszustand der Tür erkannt werden kann.The figure shows a section through a refrigerator door 1 and an outer wall of the refrigerator compartment 2, which is opposite the door hinge of the door 1. The door 1 and the Outer wall 2 are foamed in the usual way with an insulating layer. in the The inside of the door 1 and the outer wall 2 are made of a plastic layer 7, 8 lined. The door 1 has a seal 3 on its outer edge, in a magnetic stripe 4 is embedded. The door is in the closed state Magnetic strip 4 on a metal sheet 6 with which the outer region of the wall is covered and which is folded in the area of the magnetic strip 4. At a A Hall sensor 5 is embedded in the place of the metal sheet Door faces the magnetic stripe. The Hall voltage occurring at the Hall sensor is evaluated by an electronic circuit, not shown. When the door is opened, the Hall voltage changes, so that the Opening status of the door can be recognized.

Claims (6)

Kühlgerät zum Kühlen und/oder Gefrieren von Waren mit mindestens einem Kühlraum, der durch eine Tür verschließbar ist, und mit einer an der Tür umlaufenden Türdichtung, die magnetische Eigenschaften aufweist,
dadurch gekennzeichnet, daß an einer Stelle der Außenwandung des Kühlraumes im Bereich der an die Außenwandung anstoßenden Türdichtung ein Hall-Sensor angeordnet ist. Cooling device for cooling and / or freezing goods with at least one cold room that can be closed by a door, and with a door seal running around the door, which has magnetic properties,
characterized, that a Hall sensor is arranged at a point on the outer wall of the cooling space in the region of the door seal abutting the outer wall. Kühlgerät nach Anspruch 1, dadurch gekennzeichnet, daß der Hall-Sensor an der dem Türscharnier gegenüberliegenden Außenwandung angeordnet ist. Cooling device according to claim 1, characterized in that the Hall sensor the outer wall opposite the door hinge is arranged. Kühlgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß in die Türdichtung ein Magnetstreifen eingebettet ist.Cooling device according to claim 1 or 2, characterized in that in the door seal a magnetic stripe is embedded. Kühlgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Türdichtung aus einem magnetisierten Dichtungsmaterial besteht.Cooling device according to claim 1 or 2, characterized in that the door seal consists of a magnetized sealing material. Kühlgerät nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß mit der elektronischen Schaltung zur Erfassung der Türöffnung die Innenbeleuchtung des Kühlraums angesteuert wird.Cooling device according to one of claims 1 to 4, characterized in that the interior lighting with the electronic circuit for detecting the door opening of the refrigerator compartment is controlled. Kühlgerät nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß mit der elektronischen Schaltung zur Erfassung der Türöffnung ein Alarm ausgelöst wird, sobald die Tür über eine vorgegebene Höchstzeit geöffnet ist.Cooling device according to one of claims 1 to 5, characterized in that an alarm with the electronic circuit for detecting the door opening is triggered as soon as the door is opened for a predetermined maximum time.
EP99112125A 1998-07-08 1999-06-23 Refrigerator with sensor for recording the opening of the door Withdrawn EP0971187A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE29812189 1998-07-08
DE29812189U 1998-07-08
DE29814242U 1998-08-07
DE29814242U DE29814242U1 (en) 1998-07-08 1998-08-07 Cooling device with sensor for detecting the door opening

Publications (1)

Publication Number Publication Date
EP0971187A1 true EP0971187A1 (en) 2000-01-12

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Application Number Title Priority Date Filing Date
EP99112125A Withdrawn EP0971187A1 (en) 1998-07-08 1999-06-23 Refrigerator with sensor for recording the opening of the door

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1473529A1 (en) * 2003-04-30 2004-11-03 Liebherr-Hausgeräte Ochsenhausen GmbH Sensor unit and refrigerator with sensor unit
WO2019096533A1 (en) * 2017-11-15 2019-05-23 Arcelik Anonim Sirketi Refrigerator door warning system

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2208192A1 (en) * 1971-02-22 1972-09-07 Avon Rubber Co Ltd , Melksham, Wiltshire (Großbritannien) Magnetic sealing strip
DE2312291A1 (en) * 1973-03-13 1974-09-19 Max Baermann SEALING AND SLIDING ELEMENT FOR DOORS, WINDOWS, CONTAINERS, REFRIGERATORS AND THE LIKE
DE2715902A1 (en) * 1976-04-09 1977-10-20 Schlegel Uk Ltd MAGNETIC SEALING STRIP
US4241337A (en) * 1979-03-29 1980-12-23 General Electric Company Appliance door position sensor arrangement
DE3412572A1 (en) * 1984-04-04 1985-10-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Device for emitting an electrical signal for doors
US4843833A (en) * 1984-03-06 1989-07-04 Trw Canada Limited Appliance control system
US4891626A (en) * 1989-01-18 1990-01-02 Neuman Industries, Inc. Refrigerator door ajar detection system
EP0463429A2 (en) * 1990-06-22 1992-01-02 Ranco Incorporated Of Delaware Door ajar alarm for refrigeration unit

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2208192A1 (en) * 1971-02-22 1972-09-07 Avon Rubber Co Ltd , Melksham, Wiltshire (Großbritannien) Magnetic sealing strip
DE2312291A1 (en) * 1973-03-13 1974-09-19 Max Baermann SEALING AND SLIDING ELEMENT FOR DOORS, WINDOWS, CONTAINERS, REFRIGERATORS AND THE LIKE
DE2715902A1 (en) * 1976-04-09 1977-10-20 Schlegel Uk Ltd MAGNETIC SEALING STRIP
US4241337A (en) * 1979-03-29 1980-12-23 General Electric Company Appliance door position sensor arrangement
US4843833A (en) * 1984-03-06 1989-07-04 Trw Canada Limited Appliance control system
DE3412572A1 (en) * 1984-04-04 1985-10-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Device for emitting an electrical signal for doors
US4891626A (en) * 1989-01-18 1990-01-02 Neuman Industries, Inc. Refrigerator door ajar detection system
EP0463429A2 (en) * 1990-06-22 1992-01-02 Ranco Incorporated Of Delaware Door ajar alarm for refrigeration unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1473529A1 (en) * 2003-04-30 2004-11-03 Liebherr-Hausgeräte Ochsenhausen GmbH Sensor unit and refrigerator with sensor unit
WO2019096533A1 (en) * 2017-11-15 2019-05-23 Arcelik Anonim Sirketi Refrigerator door warning system

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