DE2630111A1 - Refrigerator operating state evaluating system - has temp. sensor and system for comparing temp. measured at intervals - Google Patents

Refrigerator operating state evaluating system - has temp. sensor and system for comparing temp. measured at intervals

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Publication number
DE2630111A1
DE2630111A1 DE19762630111 DE2630111A DE2630111A1 DE 2630111 A1 DE2630111 A1 DE 2630111A1 DE 19762630111 DE19762630111 DE 19762630111 DE 2630111 A DE2630111 A DE 2630111A DE 2630111 A1 DE2630111 A1 DE 2630111A1
Authority
DE
Germany
Prior art keywords
temp
measured
signal
evaporator
operating state
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
DE19762630111
Other languages
German (de)
Inventor
Joachim Buergel
Alexander Heider
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs 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
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19762630111 priority Critical patent/DE2630111A1/en
Publication of DE2630111A1 publication Critical patent/DE2630111A1/en
Ceased legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00Arrangement or mounting of control or safety devices
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/19Control of temperature characterised by the use of electric means
    • G05D23/1917Control of temperature characterised by the use of electric means using digital means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00Means for sensing or measuring; Sensors therefor
    • F25D2700/10Sensors measuring the temperature of the evaporator
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00Means for sensing or measuring; Sensors therefor
    • F25D2700/12Sensors measuring the inside temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00Means for sensing or measuring; Sensors therefor
    • F25D2700/12Sensors measuring the inside temperature
    • F25D2700/122Sensors measuring the inside temperature of freezer compartments

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Temperature (AREA)

Abstract

The evaluating system is used to monitor operating state condition of the refrigerating system. It generates a signal when the measured temp. and previous measured temp. difference exceeds a specified value. This arrangement is used to ensure economical operation and limiting energy consumption. The freezing compartment or the refrigeration compartment temp. is evaluated at constant time intervals pref. on the evaporator. The measured temp. is compared with the previously measured temp. and a signal is generated at a certain difference of these two temperatures. The measuring transducer (1) is attached to the evaporator. The signal output of this transducer (1) is connected to analogue to digital converter (2) and to a digital counter (3). The output of digital counter (3) is connected to storages (4, 6). The latter is connected to a comparator (7).

Description

1?Verfahren und Vorrichtung zur Erfassung des 1? Method and device for detecting the

Beharrungszustandes von Gefriergeräten" Die vorliegende Erfindung bezieht sich auf ein Verfahren zur Erfassung des Beharrungszustandes von Gefriergeräten. The steady state of freezers "The present invention relates to a method for determining the steady state of freezers.

Es ist im wesentlichen dadurch gekennzeichnet, daß in konstanten Zeitabständen die Gefrierfach- oder Kühlraumtemperatur, vorzugsweise am Verdampfer, gemessen wird, daß der gemessene Temperaturwert mit dem vorausgegangenen Demperaturmeßwert verglichen wird und daß bei einer bestimmten Differenz der beiden Temperaturwerte ein Signal abgegeben wird.It is essentially characterized in that at constant time intervals the freezer or refrigerator temperature is measured, preferably on the evaporator, that the measured temperature value is compared with the previous temperature measurement value and that at a certain difference between the two temperature values, a signal is delivered.

Die Vorrichtung zur Durchführung des Verfahrens ist im wesentlichen dadurch gekennzeichnet, daß ein Neßwertaufnehmer am Verdampfer des Gefrier- oder Kühlgerätes angebracht ist, daß der Signalausgang des Meßwertnehmers an eine Reihenschaltung eines Analog-Digitalwandlers und eines Digital zählers angeschlossen ist, daß der Ausgang des Digitalzählers mit einem ersten Speicher verbunden ist, der über ein Shhieberegister mit einem zweiten Speicher gekoppelt ist, daß die beiden Speicher an einen Komparator angeschlossen sind und daß ein Taktgenerator vorgesehen ist, der mit dem Schiebregister und dem Komparator verbunden ist.The apparatus for performing the method is essentially characterized in that a Neßwertaufnehmer on the evaporator of the freezer or Cooling device is attached that the signal output of the transducer to a series circuit an analog-to-digital converter and a digital counter is connected that the Output of the digital counter is connected to a first memory that has a Shift register is coupled to a second memory that the two memories are connected to a comparator and that a clock generator is provided, which is connected to the shift register and the comparator.

Die erfindungsgemäße Signalmarke der Beharrungstemperatur dient zum Erkennen der praktisch nutzbaren Leistungsgrenze des jeweiligen Gefriergerätes (auch bei Kühl und Gefrier-Kombination).The inventive signal mark of the steady-state temperature is used to Recognition of the practically usable performance limit of the respective freezer (also for fridge and freezer combination).

Diese Beistungsgrenze ist nicht absolut zu sehen, sondern hängt von den jeweils im Einzelfall vorliegenden Betriebsbedingungen ab. Hierbei spielt die Umgebungstemperatur ebenso eine entscheidende Rolle wie auch die Geräte-Beladung, die Maschinenleistung, die Belüftungsverhältnisse des Verflüssigers und die spezifische Schrankziffer. Eine Naschinenlaufzeit über die erreichte leistungsgrenze hinaus bringt keine nutzbare Kälteleistung mehr und dient nur noch zur Kompensation der Verlustleistung. Die derzeitig übliche Stlpexschaltung bei Gefriergeräten, die schaltungstechnisch lediglich eine Überbrückung des Thermostat-Schalters darstellt, ist nicht geeignet, ein solches Gerät energiewirtschaftlich sinnvoll zu betreiben. Die Bedienung dieses Super-Schalters muß vom Anwender erfolgen und wird mit recht großzügigen Vorgabezeiten empfohlen.This service limit is not to be seen in absolute terms, but depends on the operating conditions in each individual case. This is where the Ambient temperature as well as the device load play a decisive role, the machine performance, the ventilation conditions of the condenser and the specific Locker number. A machine running time beyond the performance limit reached no longer brings usable cooling capacity and only serves to compensate for the Power dissipation. The currently common Stlpex circuit for freezers, the circuitry is only a bypassing of the thermostat switch, is not suitable to operate such a device in an energy-efficient manner. The operation of this Super switch has to be done by the user and comes with fairly generous default times recommended.

Mittels einer speziellen Logik, die mit elektronischen Eomponenten realisiert werden kann, ist es möglich, den realen Grenzfall eines jeden Gefriergerätes abhängig von den veränderlichen Betriebsbedingungen und den gerätespezifischen Verhältnissen zu ermitteln und daraus einen Funktionsvorgang abzuleiten.Using a special logic that works with electronic components can be realized, it is possible to use the real borderline case of any freezer depending on the changing operating conditions and the device-specific conditions to determine and derive a functional process from it.

Bei Geräten, die bereits mit einer elektronischen Temperatur-Erfassung und digitaler Anzeige ausgerüstet sind, ist eine Erweiterung der Schaltung gemäß der Erfindung mit wenigen Mitteln möglich.For devices that already have electronic temperature detection and digital display is an extension of the circuit according to the invention possible with few resources.

Pür die erfindungsgemäße Schaltung können bekannte elektrische Anzeigevorrichtungen in Kühl- und Gefriergeräten verwendet werden, die üblicherweise aus einem Meßwertaufnehmer, einem A/D-Wandler, einem Zähler (zumeist mit integriertem Speicher) ausgeführt sind.Known electrical display devices can be used for the circuit according to the invention are used in refrigerators and freezers, which usually consist of a transducer, an A / D converter, a counter (mostly with an integrated memory).

Die erfindungsgemaße Schaltungsanordnung wird, wie in einem Blockschaltbild der Fig. 1 dargestellt, durch ein Schieberegister 5, einen zweiten Speicher 6, einen Taktgenerator 8 sowie einen digitalen Komparator 7 erweitert.The circuit arrangement according to the invention is, as in a block diagram 1 shown by a shift register 5, a second memory 6, a Clock generator 8 and a digital comparator 7 expanded.

Für die Demperatur-Grenzwert-Erkennung wird nun einfach ein Vergleich der im Speicher 6 stehenden Temperatur-Zahl mit dem nächstfolgenden Meßwert durchgeführt. Liegt ein Gleichstand vor, so bedeutet das, daß keine Anderung der Temperatur an der Pühlstelle mehr erfolgte und somit die Leistungsgrenze der maschine erreicht ist.A comparison is now simply made for the temperature limit value detection the temperature number in memory 6 is carried out with the next measured value. If there is a tie, this means that there is no change in temperature the pühlstelle took place more and thus reached the performance limit of the machine is.

Entscheidend für diese Aussage ist die Taktzeit, in der die Temperaturmessungen erfolgen oder in der der Vergleich zwischen Speicher-Stand und neuem Meßwert erfolgt. Will man den MeBtakt und den Vergleichstakt unabhängig voneinander festlegen, so wird für die Vergleichsschaltung noch ein Zwischenspeicher 6 benötigt, aus dem dann der zum Vergleich benötigte Meßwert, unabhängig vom Meßtakt, abgerufen werden kann.The cycle time in which the temperature measurements are made is decisive for this statement or in which the comparison between the memory status and the new measured value is made. If one wants to determine the measuring rate and the comparison rate independently of one another, then a buffer 6 is required for the comparison circuit, from which then the measured value required for comparison can be called up regardless of the measuring cycle.

In Fig. 2 ist schematisch der Temperaturverlauf in Abhängigkeit von der Zeit dargestellt, wie er mit der Schaltung nach Fig. 1 gemessen wird.In Fig. 2, the temperature profile is schematically dependent on the time shown as it is measured with the circuit of FIG.

Wie aus dem geschilderten Vorgang zu entnehmen ist, handelt es sich bei den benötigten Speichern um dynamische Speicher-Typen, die heute in T2D oder C - Mos - Technik sehr preiswert zur Verfügung stehen.As can be seen from the process described, it is In the case of the required memories, dynamic memory types are now available in T2D or C-Mos technology are available very inexpensively.

Als Vergleicher ist eineKomparator-Schaltung zu verwenden, mit deren Hilfe drei Aussage-Zustände möglich sind.A comparator circuit is to be used as a comparator Help three statement states are possible.

1. A z B 2. ALB 3. A = B Von Interesse ist für die beschriebene Anwendung nur der Ausgangszustand A = B.1. A z B 2. ALB 3. A = B This is of interest for the application described only the initial state A = B.

l)a für die vorliegende Aufgabe nur die letzte Stelle der Ziffern-Information der gemessenen Temperatur von Bedeutung ist, wird nur eine 4 Bit umfassende Logik zur Signalgewinnung benötigt. Auch hierfür stehen preiswerte integrierte Schaltungen zur Verfügung.l) a only the last digit of the digit information for the task at hand the measured temperature is important, only a 4-bit logic is used required for signal acquisition. Inexpensive integrated circuits are also available for this to disposal.

Nit der erfindungsgemäßen Schaltung kann der Gefriervorgang iiberwacht und einer das abgegebene Signal angezeigt und beendet werden, wobei eine automatische Rückstellung auf den normalen Regelbetrieb vorgenommen wird.The freezing process can be monitored with the circuit according to the invention and one the output signal are displayed and terminated, with an automatic Reset to normal operation is carried out.

k Seiten Beschreibung 2 Patentansprüche 1 Bl. Zeichnung (2 Fig.) L e e r s e i t ek pages description 2 patent claims 1 sheet drawing (2 fig.) L. e e r e i t e

Claims (2)

Patentansprüche 1. Verfahren zur Erfassung des Beharrungszustandes von Gefriergeräten, dadurch gekennzeichnet, daß in konstanten Zeitabständen die Gefrierfach- oder Kühiraumtemperatur, vorzugsweise am Verdampfer, gemessen wird, daß der gemessene Temperaturwert mit dem vorausgegangenen Temperaturmeßwert verglichen wird und daß bei einer bestimmten Differenz der beiden Temperaturwerte ein Signal abgegeben wird. Claims 1. A method for detecting the steady state of freezers, characterized in that the Freezer or refrigerator temperature is measured, preferably on the evaporator, that the measured temperature value is compared with the previous temperature reading and that at a certain difference between the two temperature values, a signal is delivered. 2. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß ein Heßwertaufnehmer (1) am Verdampfer des Gefrier- oder Kühlgerätes angebracht ist, daß der Signalausgang des Meßwertnehmers (1) an eine Reihenschaltung eines Analog-Digitalwandlers (2) und eines Digitalzählers (3) angeschlossen ist, daß der Ausgang des Digitalzählers (3) mit einem ersten Speicher (4) verbunden ist, der über ein-Schieberegister (5) mit einem zweiten Speicher (6) gekoppelt ist, daß die beiden Speicher (4, 6) an einen Komparator (7) angeschlossen sind und daß ein Taktgenerator (8) vorgesehen ist, der mit dem Schieberegister (5) und dem Komparator (7) verbunden ist.2. Apparatus for performing the method according to claim 1, characterized characterized in that a Heßwertaufnehmer (1) on the evaporator of the freezer or refrigerator is attached that the signal output of the transducer (1) to a series circuit an analog-digital converter (2) and a digital counter (3) are connected, that the output of the digital counter (3) is connected to a first memory (4), which is coupled to a second memory (6) via a shift register (5), that the two memories (4, 6) are connected to a comparator (7) and that one Clock generator (8) is provided with the shift register (5) and the comparator (7) is connected.
DE19762630111 1976-07-05 1976-07-05 Refrigerator operating state evaluating system - has temp. sensor and system for comparing temp. measured at intervals Ceased DE2630111A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762630111 DE2630111A1 (en) 1976-07-05 1976-07-05 Refrigerator operating state evaluating system - has temp. sensor and system for comparing temp. measured at intervals

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DE19762630111 DE2630111A1 (en) 1976-07-05 1976-07-05 Refrigerator operating state evaluating system - has temp. sensor and system for comparing temp. measured at intervals

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DE2630111A1 true DE2630111A1 (en) 1978-01-12

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2554567A1 (en) * 1983-11-08 1985-05-10 Bosch Siemens Hausgeraete Economical running of domestic freezer
FR2554568A1 (en) * 1983-11-08 1985-05-10 Bosch Siemens Hausgeraete Pre-freezer control for refrigeration plant
FR2589561A1 (en) * 1985-11-05 1987-05-07 Froilabo METHOD OF PROTECTING A REFRIGERATING FACILITY AGAINST THE DEPOSITS OF ADDITIVES IN THE CIRCUIT OF THE HEAT PUMP FLUID, AND CENTRAL USING SUCH A METHOD
EP0288967A1 (en) * 1987-04-29 1988-11-02 ITALORA S.p.A. Process and device for regulating and controlling a refrigeration unit
EP0483908A1 (en) * 1990-10-30 1992-05-06 Whirlpool Europe B.V. Device for controlling the operation of a refrigeration appliance, such as a domestic refrigerator, a freezer or the like
DE19913896A1 (en) * 1999-03-26 2000-11-02 Electrolux Siegen Gmbh Absorber fridge for cooling a refrigerator has a controller to regulate a capacity level in a cooling circuit and a temperature sensor to give the controller a temperature level for a cooling agent's temperature in a vaporizer.
NL1016780C2 (en) * 2000-12-04 2002-06-05 Design & Engineerings Buro Van Controlling cooling method for e.g. air or water, by switching compressor on and off depending on temperature of cooled medium leaving heat exchanger

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2554567A1 (en) * 1983-11-08 1985-05-10 Bosch Siemens Hausgeraete Economical running of domestic freezer
FR2554568A1 (en) * 1983-11-08 1985-05-10 Bosch Siemens Hausgeraete Pre-freezer control for refrigeration plant
FR2589561A1 (en) * 1985-11-05 1987-05-07 Froilabo METHOD OF PROTECTING A REFRIGERATING FACILITY AGAINST THE DEPOSITS OF ADDITIVES IN THE CIRCUIT OF THE HEAT PUMP FLUID, AND CENTRAL USING SUCH A METHOD
EP0227504A1 (en) * 1985-11-05 1987-07-01 FROILABO, Société Anonyme: Method of protecting a refrigeration plant against deposits of additives in the refrigerant circuit
EP0288967A1 (en) * 1987-04-29 1988-11-02 ITALORA S.p.A. Process and device for regulating and controlling a refrigeration unit
EP0483908A1 (en) * 1990-10-30 1992-05-06 Whirlpool Europe B.V. Device for controlling the operation of a refrigeration appliance, such as a domestic refrigerator, a freezer or the like
DE19913896A1 (en) * 1999-03-26 2000-11-02 Electrolux Siegen Gmbh Absorber fridge for cooling a refrigerator has a controller to regulate a capacity level in a cooling circuit and a temperature sensor to give the controller a temperature level for a cooling agent's temperature in a vaporizer.
DE19913896C2 (en) * 1999-03-26 2001-03-15 Electrolux Siegen Gmbh Absorber fridge
NL1016780C2 (en) * 2000-12-04 2002-06-05 Design & Engineerings Buro Van Controlling cooling method for e.g. air or water, by switching compressor on and off depending on temperature of cooled medium leaving heat exchanger

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