EP0689018B1 - Circuit arrangement and assembly as a switch-lamp combination for a freezer apparatus - Google Patents

Circuit arrangement and assembly as a switch-lamp combination for a freezer apparatus Download PDF

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Publication number
EP0689018B1
EP0689018B1 EP94108304A EP94108304A EP0689018B1 EP 0689018 B1 EP0689018 B1 EP 0689018B1 EP 94108304 A EP94108304 A EP 94108304A EP 94108304 A EP94108304 A EP 94108304A EP 0689018 B1 EP0689018 B1 EP 0689018B1
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EP
European Patent Office
Prior art keywords
signal lamp
switch
lamp
signal
designed
Prior art date
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Revoked
Application number
EP94108304A
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German (de)
French (fr)
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EP0689018A1 (en
Inventor
Klaus Imer
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Haschkamp Ernestine
Haschkamp Wolfgang Dipl-Kfm
Original Assignee
Haschkamp Ernestine
Haschkamp Joachim Dipl-Ing
Haschkamp Wolfgang Dipl-Kfm
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Application filed by Haschkamp Ernestine, Haschkamp Joachim Dipl-Ing, Haschkamp Wolfgang Dipl-Kfm filed Critical Haschkamp Ernestine
Priority to DK94108304.0T priority Critical patent/DK0689018T3/en
Priority to DE59401477T priority patent/DE59401477D1/en
Priority to AT94108304T priority patent/ATE147153T1/en
Priority to EP94108304A priority patent/EP0689018B1/en
Priority to HU9501562A priority patent/HU215873B/en
Publication of EP0689018A1 publication Critical patent/EP0689018A1/en
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Publication of EP0689018B1 publication Critical patent/EP0689018B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/0207—Driving circuits
    • 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
    • F25D29/005—Mounting of control 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
    • 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
    • F25D2400/36—Visual displays

Definitions

  • the installation unit 10 has seven contacts 1 to 7.
  • the quick freeze switch 12 has working contacts 121 and 122 and a normally closed contact 123.
  • the three signal lamps L1, L2 and L3 are connected via series resistors 14 to 18 in the manner described below.
  • a warning tone generator 20, which is designed as a piezo signal generator, emits an acoustic warning signal as soon as the temperature in the freezer rises dangerously high and the red warning lamp L3 lights up.
  • the normally open contact 301 of the thermostat 30 causes the motor to be switched on cyclically, the normally open contact 302 is only closed when (despite the motor running) the temperature becomes too high, because e.g. the freezer door is open.
  • the red signal lamp L3 is thus energized, which indicates that the interior is getting dangerously warm.
  • the piezoelectric sensor 20 (when the fast freeze switch 12 is switched off) is connected to voltage via the series resistor 14, in parallel to the glow signal lamp L3, which in this operating state, as an oscillator, generates the vibrations which excite the warning tone generator.
  • the acoustic signal generator can be switched off by switching on the rapid freeze switch, whereby its normally closed contact 123 is interrupted, so that the signal generator 20 no longer receives any current.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Switches With Compound Operations (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Push-Button Switches (AREA)

Abstract

The unit (10) has a green signal lamp (L1) for normal operation, a yellow signal lamp (L2) for continuous operation and a red signal lamp (L3) for indicating an abnormal condition. A piezoelectric buzzer (20) provides a warning signal tone when the temp rises above a given threshold value, the red signal lamp acting as the oscillation generator for the piezoelectric buzzer. The 3 signal lamps are combined with the rapid-freezing switch (12) and the piezoelectric buzzer in a plug-in module, the green and yellow signal lamps coupled to the refrigeration motor and the red signal lamp to a temp. sensor, when the module is fitted in the refrigeration device. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Schaltungsanordnung nach dem Oberbegriff des Anspruchs 1 und auf eine Einbaueinheit als Schalter-Leuchten-Kombination für Gefriergeräte mit einer solchen Schaltungsanordnung.The invention relates to a circuit arrangement according to the preamble of claim 1 and to a built-in unit as a switch-lamp combination for freezers with such a circuit arrangement.

Die im Haushalt verwendeten Gefriergeräte, wie Gefriertruhen und Gefrierschränke, weisen allgemein eine zu einer Baueinheit zusammengefaßte und in das Gehäuse des Gefriergerätes eingesetzte Schalter-Leuchten-Kombination auf, die drei Signallampen und einen Schnellgefrierschalter aufweist. Eine erste (grüne) Signallampe zeigt an, daß das Gerät im Normalbetrieb arbeitet. Die zweite (gelbe) Signallampe zeigt an, daß der Schnellgefrierschalter eingeschaltet und der Regelkontakt des Thermostaten überbrückt ist, so daß der Kompressor dauernd läuft.The freezers used in the household, such as freezers and freezers, generally have a switch-lamp combination combined into one structural unit and inserted into the housing of the freezer, which has three signal lamps and a rapid freezer switch. A first (green) signal lamp indicates that the device is operating in normal mode. The second (yellow) signal lamp indicates that the quick freeze switch is switched on and the control contact of the thermostat is bridged so that the compressor runs continuously.

Die dritte (rote) Signallampe zeigt an, daß die Temperatur im Inneren des Gerätes auf einen gefährlichen Wert angestiegen ist, weil beispielsweise die Türen oder Klappen nicht ordnungsgemäß geschlossen sind. Bei vielen Geräten ist zusätzlich noch ein Warntongeber angeschlossen, der gleichzeitig mit dem Aufleuchten der roten Signallampe einen Warnton abgibt, der durch Einschalten des Schnellgefrierschalters abgeschaltet werden kann. Dieser akustische Warntongeber ist häufig als Piezosignalgeber ausgebildet, der bei entsprechender Erregung einen durchdringenden, unüberhörbaren Warnton, beispielsweise im Frequenzbereich zwischen 3 und 4 kHz, abgibt. Die Erregung erfolgt über einen Oszillator, der mit der entsprechenden Frequenz schwingt.The third (red) signal lamp indicates that the temperature inside the device has risen to a dangerous level because, for example, the doors or flaps are not properly closed. In many devices, an additional warning sounder is connected, which emits a warning tone at the same time as the red signal lamp lights up, which can be switched off by switching on the quick freeze switch. This acoustic warning tone generator is often designed as a piezo signal generator which, when appropriately excited, emits a penetrating, unmistakable warning tone, for example in the frequency range between 3 and 4 kHz. The excitation takes place via an oscillator that oscillates at the corresponding frequency.

Der Erfindung liegt die Aufgabe zugrunde, den akustischen Warntongeber einer gattungsgemäßen Schaltungsanordnung zu vereinfachen, um ihn kostengüngstiger herstellen zu können.The object of the invention is to simplify the acoustic warning tone generator of a generic circuit arrangement in order to be able to produce it more cost-effectively.

Gelöst wird die gestellte Aufgabe durch die im Kennzeichen des Patentanspruchs 1 angegebenen Merkmale. Der Erfindung liegt demgemäß die Erkenntnis zugrunde, daß anstelle des bei bekannten Geräten notwendigen Oszillatoraufbaus Teile zur Schwingungserzeugung benutzt werden, die bereits in der Schalterkombination enthalten sind und als Oszillator die (rote) Warnsignallampe benutzt werden kann, wenn diese, wie allgemein üblich, als Glimmlampe ausgebildet ist und über einen Vorwiderstand an Netzspannung liegt. Die Zünd- und Brenncharkteristik einer solchen Glimmlampe ergibt quasi-rechteck-förmige Spannungskurven, die bevorzugt Frequenzen enthalten, die zur Erregung des Piezosignalgebers geeignet sind. Durch die Erfindung wird demgemäß der sonst übliche Oszillator bzw. die Schwingungserzeugungsschaltung eingespart, was kostenmäßig bei einem derartigen Einbaugerät nicht unwesentlich ins Gewicht fällt. Dabei ist zu berücksichtigen, daß die verwendeten Piezosignalgeber ohne ihre Erregerelektronik billig als Massenware verfügbar sind, so daß der Kostenunterschied zwischen einer Baueinheit ohne und einer Baueinheit mit Warntongeber relativ gering wird.The problem is solved by the features specified in the characterizing part of patent claim 1. The invention is accordingly based on the knowledge that, instead of the oscillator structure required in known devices, parts are used to generate vibrations which are already included in the switch combination and the (red) warning signal lamp can be used as an oscillator, if, as is customary, as a glow lamp is formed and is connected to the mains voltage via a series resistor. The ignition and burning characteristics of such a glow lamp result in quasi-rectangular voltage curves, which preferably contain frequencies that are suitable for exciting the piezo signal generator. The invention accordingly saves the otherwise usual oscillator or the oscillation generating circuit, which is of considerable importance in terms of cost in such a built-in device. It should be taken into account that the piezo signal transmitters used are cheaply available as mass-produced goods without their excitation electronics, so that the cost difference between a unit without and a unit with warning tone generator becomes relatively small.

Gemäß einem bevorzugten Ausführungsbeispiel der Erfindung ist die Schaltungsanordnung in einer Einbaueinheit zusammen mit den Signallampen und dem Schalter sowie dem Warntongeber zusammengefaßt und mit Anschlüssen versehen, die nur noch mit den im Gefriergerät vorhandenen Anschlüssen in Verbindung gebracht werden müssen.According to a preferred embodiment of the invention, the circuit arrangement is combined in one installation unit together with the signal lamps and the switch and the warning tone generator and provided with connections which only have to be connected to the connections present in the freezer.

Zweckmäßige Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Appropriate embodiments of the invention result from the subclaims.

Nachstehend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung beschrieben. In der Zeichnung zeigen:

  • Fig. 1 ein Schaltbild der Schaltungsanordnung;
  • Fig. 2 eine Seitenansicht einer erfindungsgemäß ausgebildeten Einbaueinheit;
  • Fig. 3 eine Draufsicht auf die Sichtseite der Einbaueinheit;
  • Fig. 4 eine Stirnansicht der Einbaueinheit.
An embodiment of the invention is described below described the drawing. The drawing shows:
  • Fig. 1 is a circuit diagram of the circuit arrangement;
  • 2 shows a side view of a built-in unit designed according to the invention;
  • 3 shows a plan view of the visible side of the installation unit;
  • Fig. 4 is an end view of the installation unit.

Die in den Fig. 2 bis 4 dargestellte Einbaueinheit ist in eine entsprechende Gehäuseaussparung des Gefriergerätes einsetzbar. In Fig. 1 ist diese Baueinheit 10 strichliert angedeutet und läßt die Schaltungsanordnung darin erkennen. Der übrige Teil der Schaltungsanordnung befindet sich im Gefriergerät selbst.The installation unit shown in FIGS. 2 to 4 can be inserted into a corresponding housing recess in the freezer. In Fig. 1, this assembly 10 is indicated by dashed lines and reveals the circuit arrangement therein. The rest of the circuitry is in the freezer itself.

Die Einbaueinheit 10 weist sieben Anschlußkontakte 1 bis 7 auf. Der Schnellgefrierschalter 12 besitzt Arbeitskontakte 121 und 122 sowie einen Ruhekontakt 123. Über Vorwiderstände 14 bis 18 sind die drei Signallampen L1, L2 und L3 in der nachstehend beschriebenen Weise angeschlossen. Ein Warntongeber 20, der als Piezosignalgeber ausgebildet ist, sendet ein akustisches Warnsignal aus, sobald die Temperatur im Gefriergerät gefährlich hoch ansteigt und die rote Warnlampe L3 aufleuchtet.The installation unit 10 has seven contacts 1 to 7. The quick freeze switch 12 has working contacts 121 and 122 and a normally closed contact 123. The three signal lamps L1, L2 and L3 are connected via series resistors 14 to 18 in the manner described below. A warning tone generator 20, which is designed as a piezo signal generator, emits an acoustic warning signal as soon as the temperature in the freezer rises dangerously high and the red warning lamp L3 lights up.

Das Gefriergeräte weist einen Netzanschluß N (0) und PH (Phase) auf. Ein im Inneren des Gefriergerätes angeordneter Thermostatschalter 30 mit den Arbeitskontakten 301 und 302 bewirkt das Anschalten des den Kompressor antreibenden Motors M, sobald eine vorbestimmte Temperatur überschritten wird.The freezer has a network connection N (0) and PH (phase). A thermostat switch 30, which is arranged in the interior of the freezer and has the work contacts 301 and 302, switches on the motor M driving the compressor as soon as a predetermined temperature is exceeded.

Gemäß dem Schaltbild nach Fig. 1 sind die Anschlußkontakte 1 und 2 der Einbaueinheit miteinander und mit dem freien Anschluß des Arbeitskontaktes 122 verbunden.1, the connection contacts 1 and 2 of the installation unit are connected to one another and to the free connection of the normally open contact 122.

Die miteinander verbundenen Anschlußkontakte 3 und 4 stehen einerseits mit den Arbeitskontakten 121 und 122 in der aus Fig. 1 ersichtlichen Weise in Verbindung. Parallel zu den Kontakten 3, 4 und den miteinander verbundenen Kontakten 5, 6 liegt die Reihenschaltung aus Vorwiderstand 18 und einer ersten (grünen) Glimmlampe L1. Die miteinander verbundenen Anschlüsse 5 und 6 stehen außerdem über eine (rote) Glimmlampe L3 und einen Vorwiderstand 15 mit der Anschlußklemme 7 in Verbindung. Eine (gelbe) Glimmlampe L2 ist einerseits über einen Vorwiderstand 17 an die Klemme 6 und andererseits an den einen Anschluß des Arbeitskontaktes 121 angeschlossen. Ein Widerstand 16 liegt zwischen den Anschlüssen 6 und 7.The interconnected connection contacts 3 and 4 are connected on the one hand to the normally open contacts 121 and 122 in the manner shown in FIG. 1. The series circuit comprising a series resistor 18 and a first (green) glow lamp L1 lies parallel to the contacts 3, 4 and the interconnected contacts 5, 6. The interconnected connections 5 and 6 are also connected to the connection terminal 7 via a (red) glow lamp L3 and a series resistor 15. A (yellow) glow lamp L2 is connected on the one hand via a series resistor 17 to the terminal 6 and on the other hand to the one connection of the normally open contact 121. A resistor 16 lies between the connections 6 and 7.

Die Anschlüsse 5 und 6 sind mit dem einen Anschluß des Ruhekontaktes 123 verbunden, dessen anderer Anschluß mit dem Warntonsignalgeber 20 in Verbindung steht, dessen anderer Anschluß über einen Widerstand 14 mit der Verbindungsleitung zwischen der roten Glimmlampe L3 und dem Vorwiderstand 15 in Verbindung steht.The connections 5 and 6 are connected to one connection of the normally closed contact 123, the other connection of which is connected to the warning signal generator 20, the other connection of which is connected via a resistor 14 to the connecting line between the red glow lamp L3 and the series resistor 15.

Die Netzanschlüsse N bzw. PH sind mit den Anschlußklemmen 5 bzw. 3 verbunden. Der den Kompressor antreibende Motor M ist an die Anschlußklemmen 2 und 6 angeschlossen. Die Arbeitskontakte 301 und 302 des Thermostatschalters 30 sind mit der Anschlußklemme 4 verbunden. Der freie Anschluß des Arbeitskontaktes 301 ist an die Klemme 1 und der freie Anschluß des Arbeitskontaktes 302 ist an die Klemme 7 angeschlossen.The network connections N and PH are connected to the connection terminals 5 and 3, respectively. The motor M driving the compressor is connected to terminals 2 and 6. The working contacts 301 and 302 of the thermostat switch 30 are connected to the terminal 4. The free connection of the normally open contact 301 is connected to the terminal 1 and the free connection of the normally open contact 302 is connected to the terminal 7.

Das Gefriergerät arbeitet in der üblichen Weise: Wird das Gerät an das Netz angeschaltet, dann hat der Thermostatschalter 30 (bei auf Zimmertemperatur befindlichem Gerät) seine Arbeitskontakte 301 und 302 geschlossen. Damit steht der Motor M über die Anschlußkontakte 1, 2, den Thermostatkontakt 301 und die Anschlußklemmen 4, 3 an Ph und über die Anschlußklemmen 6, 5 mit dem Netzanschluß N in Verbindung, d.h., der Motor liegt an Spannung. Gleichzeitig liegt die grüne, erste Signallampe L1 über den Widerstand 18 und die Anschlußklemmen 3 bzw. 5 an Netzspannung, d.h., die Signallampe L1 gibt den ordnungsgemäßen Betriebszustand des Gerätes an, und sie bleibt auch angeschaltet, wenn bei Erreichen der eingestellten Kühltemperatur der Thermostat 30 seinen Arbeitskontakt 301 öffnet.The freezer works in the usual way: If the device is switched on to the mains, the thermostat switch 30 (with the device at room temperature) has closed its work contacts 301 and 302. The motor M is thus connected to Ph via the connection contacts 1, 2, the thermostat contact 301 and the connection terminals 4, 3 and via the connection terminals 6, 5 with the mains connection N in connection, that is, the motor is live. At the same time, the green, first signal lamp L1 is connected to the mains voltage via the resistor 18 and the connection terminals 3 and 5, that is to say the signal lamp L1 indicates the correct operating state of the device, and it also remains switched on when the thermostat 30 reaches the set cooling temperature opens its work contact 301.

Durch Einschalten des Schnellgefrierschalters 12 werden dessen Arbeitskontakte 122 und 121 geschlossen, wodurch der Thermostatkontakt 301 kurzgeschlossen wird und der Motor M dauernd läuft. Der Ruhekontakt 123 wird geöffnet. Gleichzeitig mit dem Einschalten wird die gelbe Signallampe L2 über den Widerstand 17 an Spannung gelegt.When the quick freeze switch 12 is switched on, its normally open contacts 122 and 121 are closed, as a result of which the thermostat contact 301 is short-circuited and the motor M runs continuously. The normally closed contact 123 is opened. Simultaneously with the switching on, the yellow signal lamp L2 is connected to voltage via the resistor 17.

Während der Arbeitskontakt 301 des Thermostaten 30 das zyklische Einschalten des Motors bewirkt, wird der Arbeitskontakt 302 erst dann geschlossen, wenn (trotz laufendem Motor) die Temperatur zu hoch wird, weil z.B. die Tür des Gefriergerätes offensteht. Damit wird die rote Signallampe L3 an Spannung gelegt, die darauf hinweist, daß der Innenraum gefährlich warm wird. Gleichzeitig wird der piezoelektrische Geber 20 (bei ausgeschaltetem Schnellgefrierschalter 12) über den Vorwiderstand 14 an Spannung gelegt, und zwar parallel zur Glimmsignallampe L3, die in diesem Betriebszustand als Oszillator die den Warntongeber erregenden Schwingungen erzeugt. Abgeschaltet werden kann der akustische Signalgeber durch Einschalten des Schnellgefrierschalters, wodurch dessen Ruhekontakt 123 unterbrochen wird, so daß der Signalgeber 20 keinen Strom mehr erhält.While the normally open contact 301 of the thermostat 30 causes the motor to be switched on cyclically, the normally open contact 302 is only closed when (despite the motor running) the temperature becomes too high, because e.g. the freezer door is open. The red signal lamp L3 is thus energized, which indicates that the interior is getting dangerously warm. At the same time, the piezoelectric sensor 20 (when the fast freeze switch 12 is switched off) is connected to voltage via the series resistor 14, in parallel to the glow signal lamp L3, which in this operating state, as an oscillator, generates the vibrations which excite the warning tone generator. The acoustic signal generator can be switched off by switching on the rapid freeze switch, whereby its normally closed contact 123 is interrupted, so that the signal generator 20 no longer receives any current.

Die Fig. 2 bis 4 zeigen den Aufbau der Einbaueinheit. Diese besteht aus einem schmalen Gehäuse 40 mit einer Blende 42 an der Sichtseite und Klemmfedern 44 an den Stirnseiten. Aus der Sichtseite steht die Schaltwippe 125 des als Wippenschalter ausgebildeten Schnellgefrierschalters 12 vor. In die Schaltwippe 125 ist die gelbe Signalglimmlampe L2 eingebaut. Benachbart zur Schaltwippe 125 befindet sich die grüne Signallampe L1 bzw. deren Durchsichtscheibe. Benachbart hierzu ist die rote Glimmlampe L3 mit ihrer Durchsichtscheibe angebracht. An dem der Schaltwippe 125 entgegengesetzten Ende befindet sich der Warntongeber 20.2 to 4 show the structure of the installation unit. This consists of a narrow housing 40 with an aperture 42 on the visible side and clamping springs 44 on the end faces. From the visible side, the rocker switch 125 of the rapid freeze switch 12, which is designed as a rocker switch, projects. The yellow glow lamp L2 is built into the rocker switch 125. The green signal lamp is located next to the rocker switch 125 L1 or its viewing window. The red glow lamp L3 with its window is attached to this. The warning tone generator 20 is located at the end opposite the rocker switch 125.

Der Schnellgefrierschalter 12 kann auch als Drucktastenschalter, Schiebeschalter oder Drehschalter ausgebildet werden.The quick freeze switch 12 can also be designed as a push button switch, slide switch or rotary switch.

BezugszeichenlisteReference list

1-71-7
AnschlußkontakteConnection contacts
1010th
EinbaueinheitInstallation unit
1212th
SchnellgefrierschalterQuick freeze switch
121121
ArbeitskontaktWork contact
122122
ArbeitskontaktWork contact
123123
RuhekontaktBreak contact
125125
SchaltwippeRocker switch
14-1814-18
WiderständeResistances
2020th
WarntongeberWarning sounder
3030th
ThermostatschalterThermostat switch
301301
ArbeitskontaktWork contact
302302
ArbeitskontaktWork contact
4040
Gehäusecasing
4242
Blendecover
4444
KlemmfedernClamping springs
L1L1
erste (grüne) Signallampefirst (green) signal lamp
L2L2
zweite (gelbe) Signallampesecond (yellow) signal lamp
L3L3
dritte (rote) Signalglimmlampethird (red) signal glow lamp
PhPh
Phasephase
NN
Nullzero
MM
Motorengine

Claims (4)

  1. Circuit arrangement for a freezer,
    with a first signal lamp (L1) for optical indication of normal operation;
    with a second signal lamp (L2) for optical indication of continuous operation;
    with a third signal lamp (L3) for optical indication of overheating and
    with a warning sound generator (20) for acoustic indication of overheating;
    wherein the warning sound generator (20) is a piezoelectric signal generator, which is controlled by an oscillator,
    characterised in that at least the third signal lamp (L3) is designed as a glow lamp, and that the mains voltage is applied to the third signal lamp (L3) via a series resistance and the third signal lamp (L3) forms the oscillator for the piezoelectric signal generator (20).
  2. A modular unit (10) for a freezer, which is fitted with a circuit arrangement in accordance with Claim 1, and consists of a flat housing which surrounds the following components alongside each other:
    - the first signal lamp (L1), designed as a glow lamp, behind a green transparent cover;
    - the second signal lamp (L2), designed as a glow lamp, behind a yellow transparent cover;
    - the third signal lamp (L3), designed as a glow lamp, behind a red transparent cover;
    - a fast-freeze switch (12) designed as a rocker-switch, a push button switch, a slide switch or a rotary switch;
    - the warning sound generator (20).
  3. A modular unit according to Claim 2,
       characterised in that the front face of the flat housing has built-in clamping springs (44).
  4. A modular unit according to Claim 2,
       characterised in that the fast-freeze switch (12) has a operating rocker (125) with built-in second signal lamp (L2), and that operating rocker (125), the first signal lamp (L1) and the third signal lamp (L3) as well as the warning sound generator (20) are located in a switch cover (42) on the upper narrow face of the housing.
EP94108304A 1994-05-30 1994-05-30 Circuit arrangement and assembly as a switch-lamp combination for a freezer apparatus Revoked EP0689018B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DK94108304.0T DK0689018T3 (en) 1994-05-30 1994-05-30 Switching device and built-in units as switch-light combination for freezers
DE59401477T DE59401477D1 (en) 1994-05-30 1994-05-30 Circuit arrangement and installation units as a switch-lamp combination for freezers
AT94108304T ATE147153T1 (en) 1994-05-30 1994-05-30 CIRCUIT ARRANGEMENT AND INSTALLATION UNITS AS A SWITCH-LIGHT COMBINATION FOR FREEZERS
EP94108304A EP0689018B1 (en) 1994-05-30 1994-05-30 Circuit arrangement and assembly as a switch-lamp combination for a freezer apparatus
HU9501562A HU215873B (en) 1994-05-30 1995-05-29 Circuit arrangement and switching-lighting unit for refrigerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94108304A EP0689018B1 (en) 1994-05-30 1994-05-30 Circuit arrangement and assembly as a switch-lamp combination for a freezer apparatus

Publications (2)

Publication Number Publication Date
EP0689018A1 EP0689018A1 (en) 1995-12-27
EP0689018B1 true EP0689018B1 (en) 1997-01-02

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Application Number Title Priority Date Filing Date
EP94108304A Revoked EP0689018B1 (en) 1994-05-30 1994-05-30 Circuit arrangement and assembly as a switch-lamp combination for a freezer apparatus

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EP (1) EP0689018B1 (en)
AT (1) ATE147153T1 (en)
DE (1) DE59401477D1 (en)
DK (1) DK0689018T3 (en)
HU (1) HU215873B (en)

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DE102011116147A1 (en) * 2011-09-06 2013-03-07 Liebherr-Hausgeräte Ochsenhausen GmbH Cooling and freezing apparatus has short-stroke switch that is provided to prevent switching of electrical and electronic components partially or completely, when electrical and electronic components are not mounted in incorrect state

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Publication number Priority date Publication date Assignee Title
DE1986544U (en) * 1968-01-23 1968-06-06 Linde Hausgeraete G M B H FREEZER CHEST.
DE1946259B2 (en) * 1969-09-12 1976-10-07 Deep freeze with additional temp controlled switch in lid - switch in parallel with temp controller and rapid freeze selector switch
DE7705429U1 (en) * 1977-02-23 1977-06-02 Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart Switching and display device for an electrically operated household appliance, in particular a control panel for a freezer or the like
DE3113561A1 (en) * 1981-04-03 1982-11-04 Linde Ag, 6200 Wiesbaden Acoustic warning device
DE8226296U1 (en) * 1982-09-17 1982-11-04 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart COOLING UNIT, IN PARTICULAR REFRIGERATOR OR FREEZER

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HU9501562D0 (en) 1995-07-28
DE59401477D1 (en) 1997-02-13
ATE147153T1 (en) 1997-01-15
HUT73862A (en) 1996-10-28
EP0689018A1 (en) 1995-12-27
HU215873B (en) 1999-03-29
DK0689018T3 (en) 1997-06-02

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