EP0173034A1 - Circuit arrangement for the cooling cycles of at least two cold levels - Google Patents
Circuit arrangement for the cooling cycles of at least two cold levels Download PDFInfo
- Publication number
- EP0173034A1 EP0173034A1 EP85108401A EP85108401A EP0173034A1 EP 0173034 A1 EP0173034 A1 EP 0173034A1 EP 85108401 A EP85108401 A EP 85108401A EP 85108401 A EP85108401 A EP 85108401A EP 0173034 A1 EP0173034 A1 EP 0173034A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- circuit
- sensors
- circuit arrangement
- logic
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 77
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 235000008504 concentrate Nutrition 0.000 claims abstract description 21
- 238000005057 refrigeration Methods 0.000 claims abstract description 11
- 235000013361 beverage Nutrition 0.000 abstract description 8
- 239000012141 concentrate Substances 0.000 abstract description 2
- VTVVPPOHYJJIJR-UHFFFAOYSA-N carbon dioxide;hydrate Chemical compound O.O=C=O VTVVPPOHYJJIJR-UHFFFAOYSA-N 0.000 abstract 1
- 239000003507 refrigerant Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Images
Classifications
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- 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
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D1/00—Apparatus or devices for dispensing beverages on draught
- B67D1/08—Details
- B67D1/0857—Cooling arrangements
- B67D1/0858—Cooling arrangements using compression systems
- B67D1/0861—Cooling arrangements using compression systems the evaporator acting through an intermediate heat transfer means
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- 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
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
- F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
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- 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
- F25D31/00—Other cooling or freezing apparatus
- F25D31/002—Liquid coolers, e.g. beverage cooler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2511—Evaporator distribution valves
Definitions
- the present invention relates to a circuit arrangement for controlling cooling circuits for at least two cooling areas, in particular in vending machines with cooling of the CO Z water supply and the space for the beverage concentrates, by means of one of two evaporators which can optionally be switched into the cooling circuit of a condenser via a valve arrangement Dependency of the cooling demand detected by sensors with priority connection of one of the cooling circuits.
- a valve system optionally connecting the evaporator part to the condensers .
- Compressor condensers are usually used in this context.
- the evaporators are preferably connected alternately to the condenser in order to achieve the best possible efficiency and to keep the manufacturing outlay low. If one of the cooling areas is to be cooled particularly - for example the freezer unit in a fridge-freezer combination - a priority circuit is used in a known manner. Only when this preferred cooling area has been sufficiently subjected to the cooling process is the further cooling area supplied when there is a need for cooling.
- a mixed drink in which a mixed drink can be provided by mixing carbonated water with beverage concentrates, it is necessary, or at least to a great extent, to cool the container in which the carbonated water is kept ready or the water is carbonized. The cooler the water, the greater its absorption capacity for CO 2 gas.
- the volume fraction is a multiple of the volume fraction of the beverage concentration concentrate, so that the temperature of the carbonator is also essentially determining the temperature of the mixed beverage.
- the cooling of the carbonated water has a natural limit set by the freezing point of the mixture.
- part of the carbonated water is stored in ice form.
- the ice sheet that forms is evaluated as a criterion for the cooling supply.
- the temperature of the mixed beverage can be higher than the desired beverage temperature. For this reason and in order to expose the stored beverage concentrates to advantageous storage conditions, it may also be necessary to cool the storage space for the beverage concentrates. On the other hand, however, it is also desirable to expand the "refrigeration capacity" as much as possible in the event of a relatively high expected beverage dispensing requirement, namely through the provisional formation of the strongest possible ice sheet.
- the present invention is based on the object of providing a circuit arrangement for controlling cooling circuits for at least two cooling areas, in particular for the described application area, which is able to meet different cooling energy needs from a common cooling system for the two cooling areas.
- a circuit arrangement for a cooling circuit with a condenser and with a plurality of evaporators, which can be connected to this condenser by means of a valve arrangement, is characterized according to the invention in that sensors are assigned to at least one of the cooling areas for at least two cooling demand criteria and at least one further cooling area for at least one cooling demand criterion and that the sensors are assigned different priorities in such a way that the priority of the refrigeration requirement criteria alternates between the cooling areas by means of a logic link circuit connected downstream of the sensors.
- a circuit arrangement for controlling cooling circuits constructed according to these criteria according to the invention is preferably suitable for vending machines with separate storage of carbonated water and beverage concentrates to the extent that the cooling of the water supply to a predetermined basic value takes priority over the cooling of the storage space for the beverage concentrates.
- the water supply is to be subjected to additional cooling - for example in the event that provision is made for increased output of carbonated water, which is replaced by warmer fresh water, then this cooling requirement is subordinate to the cooling of the beverage concentrate storage space.
- the circuit arrangement according to the invention when used in vending machines is characterized in that the sensors for the provision of the cooling requirement criteria for the carbonated water are electrodes which are arranged in areas of the ice sheet being formed at different distances from the cooling device.
- the electrode by means of which the highest-ranking cooling requirement within the vending machine can be ascertained, is arranged in an area in which the ice sheet that forms has a predetermined minimum thickness.
- the second electrode detects an additionally reinforced formation of the ice sheet. Regardless of the thickness of the ice sheet formed, however, the temperature of the carbonator is approximately the same in the area near and above the freezing point.
- An electronic evaluable switching element for example an NTC switching element, can expediently be used to record the cooling requirement in the pre-locking space for the beverage concentrates.
- a circuit arrangement constructed according to the features according to the invention will expediently be designed in such a way that all sensors for providing the cooling requirement criteria are linked via an OR link and can thus be evaluated for activating the cooling circuit.
- a priority must be assigned to the individual cooling demand criteria by means of a further logic logic circuit, to which the signals from the heat demand sensors are fed, the output signal of this further logic logic circuit controlling the changeover valve for the cooling circuit. If the circuit is designed in such a way that the changeover valve assumes a preferred switching position, the effort for this further logic logic circuit can be simplified. Is this preferred basic position assigned, for example, to the refrigeration area, from which the refrigeration requirement is also assigned criterion for the last-ranking cold area can be tapped, the detection of this criterion in the further logic logic circuit can be dispensed with.
- the cooling circuit for the vending machine essentially consists of a compressor VD driven by a motor M, a condenser section VS, a switchover valve UPS which can be controlled by a switching magnet USM, and two evaporator sections VDS1 and VDS2 with associated throttle valves DrVl and DrV2 for the storage tank VT for the CO Z water supply or for the VR storage room for the beverage concentrates.
- Sensors ES1 and ES2 for monitoring ice sheet formation in the CO 2 water supply are arranged in the storage tank VT.
- the different resistance value of the liquid state or the ice state between the respective sensors and the housing wall of the storage tank VT is evaluated and supplied to the differential amplifiers DV1 and DV2 as a control criterion.
- a temperature-dependent variable resistor TR is used, which is assigned to the differential amplifier DV3.
- the sensor ES2 can only be switched on as required via a switch ZS. In normal operation for the vending machine, only the sensor ES1 and the sensor TR supply cold requirement criteria to the evaluation circuit. If, however, increased ice sheet formation is to be formed in the storage tank VT for the carbonized water, the sensor ES2 is also connected to the evaluation circuit via the switch ZS.
- the outputs of all differential amplifiers DV1, DV2, DV3 are linked via an OR logic circuit OG and control the motor M for the refrigerant compressor VD via an amplifier stage V2 and a power amplifier. This means that regardless of which of the sensors signals a need for cooling, the cooling system comes into operation.
- the outputs of the differential amplifiers DV1 and DV2 are fed to an AND logic circuit UG, the output of which controls the switching magnet USM for the refrigerant switching valve UPS via an amplifier circuit V1 and a power amplifier.
- the output signal of the DIN differential amplifier DV1 is fed inverted to the input of the AND logic circuit UG.
- the refrigerant changeover valve UPS preferably takes the starting position, in which the refrigeration cycle is conducted via the evaporator section VDS1 of the storage tank VT for the carbonated water.
- the refrigerant changeover valve UPS returns to its starting position.
- the switch ZS is closed, a refrigeration requirement criterion from the sensor ES2 is only evaluated to control the refrigerant compressor VD via its motor M, so that refrigerant is again applied to the evaporator section VDS1.
- circuit arrangement specified as an exemplary embodiment will be part of an overall circuit for operating a beverage machine.
- control logic it is then conceivable and expedient to use a microprocessor circuit instead of discrete switching elements.
- circuitry measures are implemented by functional modules, in particular in the form of logic logic elements.
- functional modules in particular in the form of logic logic elements.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Devices For Dispensing Beverages (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
- Beverage Vending Machines With Cups, And Gas Or Electricity Vending Machines (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
Die vorliegende Erfindung bezieht sich auf eine Schaltungsanordnung zum Steuern von Kühlkreisläufen für zumindest zwei Kühlbereiche, insbesondere in Getränkeautomaten mit Kühlung des COZ -Wasservorrats und des Raums für die Getränkekonzentrate, durch einen von zwei über eine Ventilanordnung wahlweise in den Kühlkreislauf eines Verflüssigers umschaltbaren Verdampfer in Abhängigkeit des durch Sensoren erfaßten Kältebedarfs unter vorrangiger Anschaltung eines der Kühlkreisläufe.The present invention relates to a circuit arrangement for controlling cooling circuits for at least two cooling areas, in particular in vending machines with cooling of the CO Z water supply and the space for the beverage concentrates, by means of one of two evaporators which can optionally be switched into the cooling circuit of a condenser via a valve arrangement Dependency of the cooling demand detected by sensors with priority connection of one of the cooling circuits.
Für eine Beaufschlagung von einer Mehrzahl von Kühlbereichen, insbesondere von zwei Kühlbereichen, ist es beispielsweise bei Kühl-Gefrier-Kombinationseinheiten bekannt geworden, ein Kühlsystem mit einem Verflüssiger und mit je einem den Kühlbereichen zugeordneten Verdampfer einzusetzen, wobei ein Ventilsystem wahlweise den Verdampferteil den Verflüssigern zuschaltet. Üblicherweise werden in diesem Zusammenhang Kompressor-Verflüssiger verwendet. Die Verdampfer werden bevorzugt alternierend dem Verflüssiger zugeschaltet, um einen möglichst guten Wirkungsgrad zu erzielen und den Herstellungsaufwand gering zu halten. Ist einer der Kühlbereiche besonders zu kühlen - beispielsweise die Tiefgefriereinheit bei einer Kühl-Gefrier-Kombination - , so findet in bekannter Weise eine Vorrangschaltung Anwendung. Erst wenn dieser bevorzugte Kühlbereich ausreichend dem Kühlprozeß unterzogen worden ist, wird der weitere Kühlbereich bei Kühlbedarf versorgt.For loading a plurality of cooling areas, in particular two cooling areas, it has become known, for example in the case of fridge-freezer combination units, to use a cooling system with one condenser and with one evaporator each associated with the cooling areas, a valve system optionally connecting the evaporator part to the condensers . Compressor condensers are usually used in this context. The evaporators are preferably connected alternately to the condenser in order to achieve the best possible efficiency and to keep the manufacturing outlay low. If one of the cooling areas is to be cooled particularly - for example the freezer unit in a fridge-freezer combination - a priority circuit is used in a known manner. Only when this preferred cooling area has been sufficiently subjected to the cooling process is the further cooling area supplied when there is a need for cooling.
Bei Getränkeautomaten, bei welchen ein Mischgetränk durch Mischung von karbonisiertem Wasser mit Getränkekonzentraten bereitstellbar ist, ist es notwendig, bzw. zumindest in hohem Maße zweckmäßig, den Behälter zu kühlen, in welchem das karbonisierte Wasser bereitgehalten wird bzw. das Wasser karbonisiert wird. Je kühler das Wasser ist, desto größer ist auch dessen Aufnahmefähigkeit für CO2 -Gas. Außerdem ist bei Mischung eines Getränks aus Getränkekonzentrat und karbonisiertem Wasser der Volumenanteil ein mehrfaches vom Volumenanteil des Getränkekonzentrats, so daß die Temperatur des Karbonisators auch im wesentlichen bestimmend ist für die Temperatur des Mischgetränks.In vending machines, in which a mixed drink can be provided by mixing carbonated water with beverage concentrates, it is necessary, or at least to a great extent, to cool the container in which the carbonated water is kept ready or the water is carbonized. The cooler the water, the greater its absorption capacity for CO 2 gas. In addition, when mixing a beverage from beverage concentrate and carbonated water, the volume fraction is a multiple of the volume fraction of the beverage concentration concentrate, so that the temperature of the carbonator is also essentially determining the temperature of the mixed beverage.
Der Kühlung des karbonisierten Wassers ist nach unten eine natürliche Grenze gesetzt, die durch den Gefrierpunkt des Gemisches gegeben ist. Zur Erhöhung der Kältekapazität wird ein Teil des karbonisierten Wassers in Eisform bevorratet. Der sich bildende Eispanzer wird als Kriterium für die Kälteversorgung ausgewertet.The cooling of the carbonated water has a natural limit set by the freezing point of the mixture. To increase the cooling capacity, part of the carbonated water is stored in ice form. The ice sheet that forms is evaluated as a criterion for the cooling supply.
Durch die Wärmekapazität von ungekühlten Getränkekonzentraten und durch weitere störende Einflüsse beim Misch- und Ausgabevorgang kann eine Temperatur des Mischgetränks die Folge sein, die oberhalb der gewünschten Getränketemperatur liegt. Deshalb und um die bevorrateten Getränkekonzentrate vorteilhaften Lagerbedingungen auszusetzen, kann es erforderlich sein, den Vorratsraum für die Getränkekonzentrate ebenfalls zu kühlen. Andererseits ist es aber auch wünschenswert, für den Fall eines relativ hohen zu erwartenden Getränkeausgabebedarfs die "Kältekapazität" möglichst stark zu erweitern, und zwar durch vorsorgliche Bildung eines möglichst starken Eispanzers.Due to the heat capacity of uncooled beverage concentrates and due to further disruptive influences during the mixing and dispensing process, the temperature of the mixed beverage can be higher than the desired beverage temperature. For this reason and in order to expose the stored beverage concentrates to advantageous storage conditions, it may also be necessary to cool the storage space for the beverage concentrates. On the other hand, however, it is also desirable to expand the "refrigeration capacity" as much as possible in the event of a relatively high expected beverage dispensing requirement, namely through the provisional formation of the strongest possible ice sheet.
Der vorliegenden Erfindung liegt nunmehr die Aufgabe zugrunde, eine Schaltungsanordnung zu steuern von Kühlkreisläufen für zumindest zwei Kühlbereiche, insbesondere für den beschriebenen Anwendungsbereich bereitzustellen, welche in der Lage ist, unterschiedlichen Bedürfnissen bezüglich der Kühlenergie aus einem gemeinsamen Kühlsystem für die beiden Kühlbereiche gerecht zu werden.The present invention is based on the object of providing a circuit arrangement for controlling cooling circuits for at least two cooling areas, in particular for the described application area, which is able to meet different cooling energy needs from a common cooling system for the two cooling areas.
Eine Schaltungsanordnung für einen Kühlkreislauf mit einem Verflüssiger und mit einer Mehrzahl von Verdampfern, welche an diesen Verflüssiger mittels einer Ventilanordnung anschließbar sind, ist erfindungsgemäß dadurch gekennzeichnet, daß Sensoren zumindest einem der Kühlbereiche für zumindest zwei Kältebedarfskriterien und zumindest einem weiteren Kühlbereich für zumindest ein Kältebedarfskriterium zugeordnet sind und daß durch eine den Sensoren nachgeschaltete logische Verknüpfungsschaltung die Sensoren unterschiedlichen Vorrangigkeiten derart zugeordnet sind, daß die Vorrangigkeit der Kältebedarfskriterien zwischen den Kühlbereichen alterniert.A circuit arrangement for a cooling circuit with a condenser and with a plurality of evaporators, which can be connected to this condenser by means of a valve arrangement, is characterized according to the invention in that sensors are assigned to at least one of the cooling areas for at least two cooling demand criteria and at least one further cooling area for at least one cooling demand criterion and that the sensors are assigned different priorities in such a way that the priority of the refrigeration requirement criteria alternates between the cooling areas by means of a logic link circuit connected downstream of the sensors.
Eine nach diesen erfindungsgemäßen Kriterien aufgebaute Schaltungsanordnung zum Steuern von Kühlkreisläufen eignet sich insofern bevorzugt für Getränkeautomaten mit getrennter Bevorratung von karbonisiertem Wasser und Getränkekonzentraten insoweit, daß die Kühlung des Wasservorrats auf einen vorgegebenen Grundwert vorrangig ist vor der Kühlung des Vorratsraums für die Getränkekonzentrate. Soll jedoch der Wasservorrat einer zusätzlichen Kühlung unterzogen werden - beispielsweise für den Fall, daß für eine erhöhte Ausgabe von karbonisiertem Wasser, welches durch wärmeres Frischwasser ersetzt wird, vorgesorgt werden soll, so ist dieser Kühlbedarf gegenüber der Kühlung des Getränkekonzentrats-Vorratsraums nachrangig.A circuit arrangement for controlling cooling circuits constructed according to these criteria according to the invention is preferably suitable for vending machines with separate storage of carbonated water and beverage concentrates to the extent that the cooling of the water supply to a predetermined basic value takes priority over the cooling of the storage space for the beverage concentrates. However, if the water supply is to be subjected to additional cooling - for example in the event that provision is made for increased output of carbonated water, which is replaced by warmer fresh water, then this cooling requirement is subordinate to the cooling of the beverage concentrate storage space.
Nach einer bevorzugten Ausgestaltung ist die erfindungsgemäße Schaltungsanordnung bei einem Einsatz in Getränkeautomaten dadurch gekennzeichnet, daß die Sensoren für die Bereitstellung der Kältebedarfskriterien für das karbonisierte Wasser Elektroden sind, welche in Bereichen des sich ausbildenden Eispanzers in unterschiedlichen Abständen von der Kühleinrichtung angeordnet sind. Die Elektrode, durch welche der höchstrangige Kältebedarf innerhalb des Getränkeautomaten erfaßbar ist, ist dabei in einem Bereich angeordnet, bei welchem der sich bildende Eispanzer eine vorgegebene Mindeststärke aufweist. Die zweite Elektrode erfaßt eine zusätzlich verstärkte Ausbildung des Eispanzers. Unabhängig von der Stärke des ausgebildeten Eispanzers ist jedoch die Temperatur des Karbonisators annähernd gleich im Bereich nahe und oberhalb des Gefrierpunktes.According to a preferred embodiment, the circuit arrangement according to the invention when used in vending machines is characterized in that the sensors for the provision of the cooling requirement criteria for the carbonated water are electrodes which are arranged in areas of the ice sheet being formed at different distances from the cooling device. The electrode, by means of which the highest-ranking cooling requirement within the vending machine can be ascertained, is arranged in an area in which the ice sheet that forms has a predetermined minimum thickness. The second electrode detects an additionally reinforced formation of the ice sheet. Regardless of the thickness of the ice sheet formed, however, the temperature of the carbonator is approximately the same in the area near and above the freezing point.
Zum Erfassen des Kältebedarfs im Vorrastsraum für die Getränkekonzentrate ist zweckmäßigerweise ein elektronisch auswertbares Schaltelement, z.B. ein NTC-Schaltelement einsetzbar. Eine nach den erfindungsgemäßen Merkmalen aufgebaute Schaltungsanordnung wird zweckmäßigerweise derart auszugestalten sein, daß über eine ODER-Verknüpfung sämtliche Sensoren für die Bereitstellung der Kältebedarfskriterien verknüpft werden und damit zur Aktivierung des Kältekreislaufes auswertbar sind. Durch eine weitere logische Verknüpfungsschaltung, welcher die Signale der Wärmebedarfs-Sensoren zugeführt werden, ist den einzelnen Kältebedarfs kriterien eine Priorität zuzuordnen, wobei das Ausgangssignal dieser weiteren logischen Verknüpfungsschaltung das Umschalteventil für den Kühlkreislauf ansteuert. Wird die Schaltung dahingehend ausgelegt, daß das Umschalteventil eine bevorzugte Schaltstellung einnimmt, so kann der Aufwand für diese weitere logische Verknüpfungsschaltung vereinfacht ausgestaltet werden. Ist diese bevorzugte Grundstellung beispielsweise dem Kältebereich zugeordnet, aus welchem auch das Kältebedarfskriterium für den letztrangigen Kältebereich abgreifbar ist, so kann auf die Erfassung dieses Kriteriums in der weiteren logischen Verknüpfungsschaltung verzichtet werden.An electronic evaluable switching element, for example an NTC switching element, can expediently be used to record the cooling requirement in the pre-locking space for the beverage concentrates. A circuit arrangement constructed according to the features according to the invention will expediently be designed in such a way that all sensors for providing the cooling requirement criteria are linked via an OR link and can thus be evaluated for activating the cooling circuit. A priority must be assigned to the individual cooling demand criteria by means of a further logic logic circuit, to which the signals from the heat demand sensors are fed, the output signal of this further logic logic circuit controlling the changeover valve for the cooling circuit. If the circuit is designed in such a way that the changeover valve assumes a preferred switching position, the effort for this further logic logic circuit can be simplified. Is this preferred basic position assigned, for example, to the refrigeration area, from which the refrigeration requirement is also assigned criterion for the last-ranking cold area can be tapped, the detection of this criterion in the further logic logic circuit can be dispensed with.
Ein nach den Merkmalen der Erfindung ausgestaltetes Ausführungsbeispiel ist anhand der Zeichnung im folgenden näher beschrieben:
- Die Figur zeigt schematisiert einen Schaltungsaufbau für den Einsatz in einem Getränkeautomaten mit Kühlung einerseits des karbonisierten Wassers und andererseits des Vorratsraums für die Getränkekonzentrate.
- The figure shows schematically a circuit structure for use in a vending machine with cooling of the carbonated water on the one hand and the storage room for the beverage concentrates on the other hand.
Der Kühlkreislauf für den Getränkeautomaten besteht im wesentlichen aus einem durch einen Motor M angetriebenen Verdichter VD, einer Verflüssigerstrecke VS, einem durch einen Umschaltemagneten USM ansteuerbaren Umschalteventil USV sowie aus zwei Verdampferstrecken VDS1 und VDS2 mit zugeordneten Drosselventilen DrVl und DrV2 für den Vorratstank VT für den COZ -Wasser-Vorrat bzw. für den Vorratsraum VR für die Getränkekonzentrate. Sensoren ES1 und ES2 zur Überwachung der Eispanzerbildung im CO2-Wasservorrat sind im Vorratstank VT angeordnet. Mittels diesen Sensoren ES1 und ES2 wird der unterschiedliche Widerstandswert des Flüssigkeitszustandes bzw. des Eiszustandes zwischen den jeweiligen Sensoren und der Gehäusewandung des Vorratstanks VT ausgewertet und den Differenzverstärkern DV1 und DV2 als Steuerkriterium zugeführt. Für das Kältebedarfskriterium im Vorratsraum VR für die Getränkekonzentrate ist ein temperaturabhängig veränderlicher Widerstand TR eingesetzt, welcher dem Differenzverstärker DV3 zugeordnet ist.The cooling circuit for the vending machine essentially consists of a compressor VD driven by a motor M, a condenser section VS, a switchover valve UPS which can be controlled by a switching magnet USM, and two evaporator sections VDS1 and VDS2 with associated throttle valves DrVl and DrV2 for the storage tank VT for the CO Z water supply or for the VR storage room for the beverage concentrates. Sensors ES1 and ES2 for monitoring ice sheet formation in the CO 2 water supply are arranged in the storage tank VT. Using these sensors ES1 and ES2, the different resistance value of the liquid state or the ice state between the respective sensors and the housing wall of the storage tank VT is evaluated and supplied to the differential amplifiers DV1 and DV2 as a control criterion. For the cooling requirement criterion in the storage room VR for the beverage concentrates, a temperature-dependent variable resistor TR is used, which is assigned to the differential amplifier DV3.
Über einen Schalter ZS ist der Sensor ES2 lediglich bedarfsweise anschaltbar. Im Normalbetrieb für den Getränkeautomaten liefern lediglich der Sensor ES1 und der Sensor TR Kältebedarnskriterien an die Auswerteschaltung. Soll aber eine verstärkte Eispanzerbildung im Vorratstank VT für das karbonisierte Wasser gebildet werden, so ist auch über den Schalter ZS der Sensor ES2 an die Auswerteschaltung angeschlossen.The sensor ES2 can only be switched on as required via a switch ZS. In normal operation for the vending machine, only the sensor ES1 and the sensor TR supply cold requirement criteria to the evaluation circuit. If, however, increased ice sheet formation is to be formed in the storage tank VT for the carbonized water, the sensor ES2 is also connected to the evaluation circuit via the switch ZS.
Die Ausgänge sämtlicher Differenzverstärker DV1, DV2, DV3 sind über eine ODER-Verknüpfungsschaltung OG verknüpft und steuern über eine Verstärkerstufe V2 und einen Leistungsverstärker den Motor M für den Kältemittel-Verdichter VD an. Dies führt dazu, daß unabhängig davon, welcher der Sensoren einen Kältebedarf signalisiert, das Kühlsystem in Funktion tritt.The outputs of all differential amplifiers DV1, DV2, DV3 are linked via an OR logic circuit OG and control the motor M for the refrigerant compressor VD via an amplifier stage V2 and a power amplifier. This means that regardless of which of the sensors signals a need for cooling, the cooling system comes into operation.
Daneben sind die Ausgängeder Differenzverstärker DV1 und DV2 einer UND-Verknüpfungsschaltung UG zugeführt, deren Ausgang über eine Verstärkerschaltung V1 und einen Leistungsverstärker den Umschaltemagneten USM für das Kältemittel-Umschaltventil USV ansteuert. Das Ausgangssignal des DIN-Differenzverstärkers DV1 wird dem Eingang der UND-Verknüpfungsschaltung UG invertiert zugeführt. Das Kältemittel-Umschalteventil USV nimmt bevorzugt die Ausgangsstellung ein, bei welcher der Kältekreislauf über die Verdampferstrecke VDS1 des Vorratstanks VT für das karbonisierte Wasser geführt ist.In addition, the outputs of the differential amplifiers DV1 and DV2 are fed to an AND logic circuit UG, the output of which controls the switching magnet USM for the refrigerant switching valve UPS via an amplifier circuit V1 and a power amplifier. The output signal of the DIN differential amplifier DV1 is fed inverted to the input of the AND logic circuit UG. The refrigerant changeover valve UPS preferably takes the starting position, in which the refrigeration cycle is conducted via the evaporator section VDS1 of the storage tank VT for the carbonated water.
Wird vom Sensor ES1 ein Kältebedarf signalisiert, so wird über das invertierte Signal an der UND-Verknüpfungsschaltung UG diese gesperrt, so daß unabhängig davon ob vom Sensor TR des Vorratsraums VR für die Getränkekonzentrate ein Wärmebedarfskriterium vorliegt. Der Kältekreislauf wird gesichert über die Verdampferstrecke VDS1 geführt. Liegt seitens des Sensors ES1 kein Kältebedarfskriterium vor, so wird durch das invertierte Signal die UND-Verknüpfungsschaltung UG durchgesteuert. Ein nunmehr vorliegendes Kältebedarfskriterium vom Sensor TR für den Getränkekonzentrats-Vorratsraum VR wird weitergeleitet und über den Verstärker V1 und den Leistungsverstärker wird der Umschaltemagnet USM erregt und damit das Kältemittel-Umschalteventil USV umgeschaltet. Damit wird die Verdampferstrecke VDS2 aktiviert und der Voratsraum VR für die Getränkekonzentrate gekühlt. Liegt jedoch seitens des Sensors TR kein Kältebedarfskriterium vor, so nimmt das Kältemittel-Umschaltventil USV wieder seine Ausgangslage ein. Ein Kältebedarfskriterium vom Sensor ES2 wird für den Fall, daß der Schalter ZS geschlossen ist, lediglich zur Ansteuerung des Kältemittel - Verdichters VD über dessen Motor M ausgewertet, so daß wiederum die Verdampferstrecke VDS1 mit Kältemittel beaufschlagt wird.If a cooling demand is signaled by the sensor ES1, this is blocked via the inverted signal at the AND logic circuit UG, so that regardless of whether the sensor TR of the storage room VR has a heat requirement criterion for the beverage concentrates. The refrigeration cycle is securely conducted via the VDS1 evaporator line. If there is no cooling requirement criterion on the part of the sensor ES1, the AND logic circuit UG is controlled by the inverted signal. A now available cooling requirement criterion from the sensor TR for the beverage concentrate storage room VR is forwarded and the switching magnet USM is excited via the amplifier V1 and the power amplifier, and thus the refrigerant switching valve UPS is switched over. This activates the evaporator section VDS2 and cools the storage room VR for the beverage concentrates. However, if there is no cooling requirement criterion on the part of the sensor TR, the refrigerant changeover valve UPS returns to its starting position. In the event that the switch ZS is closed, a refrigeration requirement criterion from the sensor ES2 is only evaluated to control the refrigerant compressor VD via its motor M, so that refrigerant is again applied to the evaporator section VDS1.
Die als Ausführungsbeispiel angegebene Schaltungsanordnung wird in der praktischen Anwendung Teil einer Gesamtschaltung zum Betrieb eines Getränkeautomantens sein. Zur Durchführung der Steuerlogik ist es dann denkbar und zweckmäßig, anstelle diskreter Schaltelemente eine Mikroprozessorschaltung zu verwenden.In practical application, the circuit arrangement specified as an exemplary embodiment will be part of an overall circuit for operating a beverage machine. To carry out the control logic, it is then conceivable and expedient to use a microprocessor circuit instead of discrete switching elements.
Im dargestellten und beschriebenen Ausführungsbeispiel sind die schaltungstechnischen Maßnahmen durch Funktionsbaugruppen, insbesondere in Form von logischen Verknüpfungsgliedern realisiert. Bevorzugt in der Verbindung mit weiteren steuertechnischen Maßnahmen ist es jedoch zweckmäßig, bei Verfolgung der erfindungsgemäßen Lösung eine Mikroprozessor-Schaltung einzusetzen, welche die dargelegten Funktionsbaugruppen äquivalent einschließt.In the exemplary embodiment shown and described, the circuitry measures are implemented by functional modules, in particular in the form of logic logic elements. However, preferably in connection with other control measures, it is expedient to use a microprocessor circuit when the solution according to the invention is pursued, which includes the functional modules described in an equivalent manner.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT85108401T ATE34039T1 (en) | 1984-08-22 | 1985-07-06 | CIRCUIT ARRANGEMENT FOR CONTROLLING COOLING CIRCUITS FOR AT LEAST TWO COOLING AREAS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3430946 | 1984-08-22 | ||
DE19843430946 DE3430946A1 (en) | 1984-08-22 | 1984-08-22 | CIRCUIT ARRANGEMENT FOR CONTROLLING COOLING CIRCUITS FOR AT LEAST TWO COOLING AREAS |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0173034A1 true EP0173034A1 (en) | 1986-03-05 |
EP0173034B1 EP0173034B1 (en) | 1988-05-04 |
Family
ID=6243669
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85108401A Expired EP0173034B1 (en) | 1984-08-22 | 1985-07-06 | Circuit arrangement for the cooling cycles of at least two cold levels |
Country Status (10)
Country | Link |
---|---|
US (1) | US4655050A (en) |
EP (1) | EP0173034B1 (en) |
JP (1) | JPS61119964A (en) |
KR (1) | KR900002318B1 (en) |
AT (1) | ATE34039T1 (en) |
AU (1) | AU592313B2 (en) |
CA (1) | CA1238393A (en) |
DE (2) | DE3430946A1 (en) |
ES (1) | ES8605090A1 (en) |
ZA (1) | ZA855303B (en) |
Cited By (2)
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WO1990000517A1 (en) * | 1988-07-07 | 1990-01-25 | Valpar Industrial Limited | Temperature control systems |
EP1162168A1 (en) * | 2000-06-07 | 2001-12-12 | Ugolini S.P.A. | A multi-tank beverage dispenser with individual cooling means for each tank and method of controlling |
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DE3545602C1 (en) * | 1985-12-21 | 1987-08-13 | Danfoss As | Control circuit for a cooling device |
US4823556A (en) * | 1987-05-15 | 1989-04-25 | Lancer Corporation | Electronic ice bank control |
DE3940878C2 (en) * | 1989-12-11 | 1993-10-14 | Bosch Siemens Hausgeraete | Device for cooling beverage components in a vending machine |
DE59104379D1 (en) * | 1990-08-16 | 1995-03-09 | Bosch Siemens Hausgeraete | Arrangement, in particular for a vending machine with a container for storing, cooling and carbonating water. |
US5219225A (en) * | 1992-06-29 | 1993-06-15 | The United States Of America As Represented By The Secretary Of The Army | Electronic triple point cell |
DE4228752C2 (en) * | 1992-09-01 | 1995-07-20 | Henry Helmuth | Milk cooling device and method for operating a milk storage device |
US6067815A (en) * | 1996-11-05 | 2000-05-30 | Tes Technology, Inc. | Dual evaporator refrigeration unit and thermal energy storage unit therefore |
US6370908B1 (en) | 1996-11-05 | 2002-04-16 | Tes Technology, Inc. | Dual evaporator refrigeration unit and thermal energy storage unit therefore |
KR100468125B1 (en) * | 2002-07-04 | 2005-01-26 | 삼성전자주식회사 | Control method of multi compartment type kimchi refrigerator |
ES2389071A1 (en) * | 2010-04-16 | 2012-10-23 | Heineken España, S.A. | Dispenser column of beverages. (Machine-translation by Google Translate, not legally binding) |
CN106610159A (en) * | 2015-10-22 | 2017-05-03 | 杭州三花家电热管理***有限公司 | Cold drink machine and thermocycling system thereof |
CN106802039A (en) | 2015-11-25 | 2017-06-06 | 杭州三花家电热管理***有限公司 | Cooling device and its control method, control system |
CN113203245A (en) * | 2021-04-30 | 2021-08-03 | 无锡酒龙仓定制酒科技发展有限公司 | Wine cabinet control system and method |
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- 1985-07-06 DE DE8585108401T patent/DE3562525D1/en not_active Expired
- 1985-07-06 EP EP85108401A patent/EP0173034B1/en not_active Expired
- 1985-07-15 ZA ZA855303A patent/ZA855303B/en unknown
- 1985-07-31 KR KR1019850005532A patent/KR900002318B1/en not_active IP Right Cessation
- 1985-08-13 AU AU46129/85A patent/AU592313B2/en not_active Ceased
- 1985-08-21 JP JP60183773A patent/JPS61119964A/en active Granted
- 1985-08-21 ES ES546301A patent/ES8605090A1/en not_active Expired
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- 1985-08-22 US US06/768,364 patent/US4655050A/en not_active Expired - Lifetime
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Also Published As
Publication number | Publication date |
---|---|
CA1238393A (en) | 1988-06-21 |
JPH0356393B2 (en) | 1991-08-28 |
KR860001997A (en) | 1986-03-24 |
AU592313B2 (en) | 1990-01-11 |
DE3562525D1 (en) | 1988-06-09 |
ES8605090A1 (en) | 1986-03-01 |
KR900002318B1 (en) | 1990-04-11 |
ES546301A0 (en) | 1986-03-01 |
DE3430946A1 (en) | 1986-03-06 |
JPS61119964A (en) | 1986-06-07 |
DE3430946C2 (en) | 1987-09-24 |
ZA855303B (en) | 1986-03-26 |
AU4612985A (en) | 1986-04-10 |
US4655050A (en) | 1987-04-07 |
ATE34039T1 (en) | 1988-05-15 |
EP0173034B1 (en) | 1988-05-04 |
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