EP3447410A2 - Refrigeration and/or freezer device with ventilator - Google Patents
Refrigeration and/or freezer device with ventilator Download PDFInfo
- Publication number
- EP3447410A2 EP3447410A2 EP18190003.6A EP18190003A EP3447410A2 EP 3447410 A2 EP3447410 A2 EP 3447410A2 EP 18190003 A EP18190003 A EP 18190003A EP 3447410 A2 EP3447410 A2 EP 3447410A2
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- European Patent Office
- Prior art keywords
- control module
- fan
- temperature
- control
- appliance according
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- 238000005057 refrigeration Methods 0.000 title description 3
- 239000003507 refrigerant Substances 0.000 claims abstract description 12
- 238000009423 ventilation Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 11
- 238000007710 freezing Methods 0.000 claims 10
- 230000008014 freezing Effects 0.000 claims 10
- 238000012886 linear function Methods 0.000 claims 1
- 239000002826 coolant Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
Definitions
- the invention relates to a refrigerator and / or freezer with a refrigerant circuit, comprising at least one evaporator and at least one condenser, and with at least one fan for targeted ventilation of a device area or a device component.
- Fans are installed within modern refrigerators and / or freezers, for example, to improve the heat transfer in condensers or evaporators of the coolant circuit.
- the energy consumption of the installed fans must not exceed the energy savings achieved by the optimized heat transfer.
- the fan size and the driven constant fan speed are therefore determined in advance depending on this condition.
- the present application therefore sets itself the goal of improving a generic refrigerator and / or freezer in terms of its achievable energy efficiency.
- the control module includes an implemented control loop with the operating voltage / speed of the fan as a controlled variable.
- a disturbance variable of the implemented control loop can be understood.
- the influencing variable has a direct influence on the nominal size of the control loop, i.
- the setpoint speed or setpoint voltage of the fan is determined as a function of the influencing variable. Irrespective of this, the influencing variable influences the actual set speed with which the fan is finally operated.
- One or more influencing variables preferably describe current operating conditions of the refrigerant circuit.
- control module of the invention clearly from a simple on / off control of a fan within a conventional Refrigerator and / or freezer differs.
- the fan can be driven at different speeds within a speed range.
- the control module can take into account a single or several influencing variables in parallel. It is also conceivable that the control module can take into account a large number of influencing variables for the control, but, depending on the situation, selects only one or more influencing variables from the available multiplicity and actually takes them into account for the control.
- one or more controlled fans may be provided in the area of the heat exchangers, i. Ideally, a fan is arranged in the region of the evaporator and / or a further fan in the region of the condenser. Through the ventilation of the components mentioned, the heat transfer is promoted.
- a controlled fan can be arranged in the cooling space of the refrigerator and / or freezer, in order to ensure better air circulation and temperature distribution there. Due to the dependence of the fan speed on the operating conditions of the refrigeration circuit, the fans can be operated more energy-efficiently by always setting them to the optimum speed depending on the situation. This also increases the freedom of design in the design of the refrigeration cycle, because through the optimized heat transfer flows or quantities can be set with greater latitude. For example, at a room temperature of 16 ° C, the speed of the base fan, which serves to aerate the condenser, must be lowered so as not to over-cool it. Otherwise, there would collect refrigerant and the pressure difference to the evaporator could drop, so that the mass flow drops too much.
- the control module takes into account as an influencing variable the current evaporator temperature and / or a deviation between the setpoint and actual temperature of the evaporator.
- the influencing variable can be the current condenser temperature and / or a deviation between the actual and desired temperature of the condenser are taken into account.
- the evaporator and / or condenser temperature can be influenced and regulated in a targeted manner by the regulation of the fan speed.
- the current ambient temperature and / or cold room temperature is taken into account by the control module as an influencing variable.
- a deviation between the setpoint and actual temperature of the cooling space for the speed control of the fan can be used as an influencing variable. This is particularly useful for a fan arranged within the refrigerator.
- the control module takes into account as an influencing variable the current compressor speed and / or power consumption of the compressor. Accordingly, it is possible to control the fan only or to control to a certain optimum speed when the compressor is actually running or starts. A corresponding regulation for setting a follow-up time of the fan after switching off the compressor is conceivable. It is also conceivable to regulate at least one fan as a function of the speed of an at least one further fan. In addition, it is conceivable to take into account the position of one or more refrigerant valves as a further influencing variable for the control module. As an example, the consideration of the valve position of a stop valve, a two- or three-way valve or the expansion valve of the refrigerant circuit may be mentioned.
- the control module it is possible to select only one or more influencing variables from a multiplicity of available influencing variables and to take these into account for the regulation.
- the selection can be made automatically by the control module, for example, always that influencing variable for the control is taken into account, which shows the greatest impact on the area to be ventilated by the controlled fan or the component to be ventilated.
- the regulation However, the voltage or rotational speed can also take place during runtime as a function of several or all available influencing variables.
- a linear transmission behavior can be assumed.
- a linear transfer function for example with at least two interpolation points and optional correlation.
- interpolation points For example, a minimum or maximum value for the control variable is used as interpolation points. Between these two nodes is preferably interpolated in the usual way. It is also possible to use interpolation points that do not fall on the endpoints. In this case, it would be possible to interpolate between the two interpolation points and to extrapolate outside the two interpolation points.
- control module may also provide a map control.
- one or more maps can be stored within the control module, which are retrievable for control.
- a refrigerator and / or freezer is described, with a corresponding coolant circuit.
- the unit is additionally equipped with a fan in the area of the evaporator and a separate fan in the area equipped with the condenser. Both fans are controlled by a special control module of the device control to a desired target speed to promote the heat transfer to the respective ventilated components.
- the setpoint speed is set variably in dependence on the current operating conditions of the refrigerant circuit in order to ensure that the fan is operated at an optimum speed for each situation and ambient condition. It is important to ensure that the energy balance between the required drive energy of the fan and energy gain through the ventilation is optimal. In addition, it should be ensured by the regulation that the fan has no negative impact on the efficiency of other components of the coolant circuit.
- the control of the fan associated with the condenser it is provided, for example, to take into account as input variables for the speed control of the current ambient temperature and the currently driven compressor speed. This makes it possible to achieve a targeted influencing and also regulation of the liquefaction temperature within the liquefier. In this sense, the current actual and setpoint temperature of the condenser for the control of the fan speed can also be taken into account as an influencing variable. In general, it is thus generally possible to achieve a control of the refrigerant distribution within the refrigerant circuit or to control the liquefaction and / or evaporation and / or suction line temperature in a targeted manner.
- the regulation of the fan associated with the evaporator which is carried out by the control module of the device control, provides for regulating this in dependence on the compressor state as well as on the compressor speed. For example, the fan is operated only when the compressor is active. Optionally, a lag time of the fan may be provided after compressor shutdown.
- the speed control provides a percentage adjustment of the fan speed between a minimum and maximum value depending on the power consumption of the compressor.
- the refrigerator and / or freezer is additionally equipped with a fan arranged inside the cold room, which ensures better air circulation and temperature distribution within the cold room.
- the speed control of this fan takes into account the compressor speed as well as the current thermostat setting to regulate the interior temperature.
- the measured internal temperature as well as its deviation from the set target temperature can also be taken into account. Due to the continuous control of the fan speed, a better cooling capacity can be achieved, especially at lower temperature settings. In addition, a uniform cold temperature distribution in the refrigerator is achieved in particular at lower temperature settings.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
Die vorliegende Erfindung betrifft ein Kühl- und/oder Gefriergerät mit einem Kältemittelkreislauf, umfassend wenigstens einen Verdampfer und wenigstens einen Verflüssiger, sowie mit wenigstens einem Ventilator zur gezielten Belüftung eines Gerätebereichs oder eine Gerätekomponente, wobei wenigstens ein Regelungsmodul zur Regelung der Drehzahl und/oder Betriebsspannung des wenigstens einen Ventilators in Abhängigkeit ein oder mehrerer Einflussgrößen vorgesehen ist.The present invention relates to a refrigerator and / or freezer with a refrigerant circuit comprising at least one evaporator and at least one condenser, and at least one fan for targeted ventilation of a device area or a device component, wherein at least one control module for controlling the speed and / or operating voltage the at least one fan is provided as a function of one or more influencing variables.
Description
Die Erfindung betrifft ein Kühl- und/oder Gefriergerät mit einem Kältemittelkreislauf, umfassend wenigstens einen Verdampfer und wenigstens einen Verflüssiger, sowie mit wenigstens einem Ventilator zur gezielten Belüftung eines Gerätebereichs oder eine Gerätekomponente.The invention relates to a refrigerator and / or freezer with a refrigerant circuit, comprising at least one evaporator and at least one condenser, and with at least one fan for targeted ventilation of a device area or a device component.
Ventilatoren werden innerhalb moderner Kühl- und/oder Gefriergeräte bspw. zur Verbesserung des Wärmeübergangs bei Verflüssigern oder Verdampfern des Kühlmittelkreislaufs verbaut. Hinsichtlich des Gesamtenergiebedarfs des Kühl- und/oder Gefriergerätes darf der Energieverbrauch der verbauten Ventilatoren natürlich nicht die durch den optimierten Wärmeübergang gewonnene Energieersparnis übersteigen. Die Ventilatorgröße und die gefahrene konstante Ventilatordrehzahl werden daher in Abhängigkeit dieser Voraussetzung vorab festgelegt.Fans are installed within modern refrigerators and / or freezers, for example, to improve the heat transfer in condensers or evaporators of the coolant circuit. Of course, with regard to the total energy requirement of the refrigerator and / or freezer, the energy consumption of the installed fans must not exceed the energy savings achieved by the optimized heat transfer. The fan size and the driven constant fan speed are therefore determined in advance depending on this condition.
Das Betreiben der Ventilatoren mit konstanter Spannung bzw. Drehzahl hat allerdings den Nachteil, dass insbesondere bei sehr effizienten Geräten und bei unterschiedlichen Umgebungsbedingungen, wie sie zum Beispiel bei der Messung des Energieverbrauchs nach dem Global Standard vorgesehen sind, nicht die optimale Energieeffizienz des Gesamtgerätes erreicht werden kann.The operation of the fans with constant voltage or speed, however, has the disadvantage that, in particular in very efficient equipment and in different environmental conditions, as for example in the measurement of the Energy consumption is provided according to the Global Standard, not the optimal energy efficiency of the entire device can be achieved.
Die vorliegende Anmeldung setzt sich daher zum Ziel, ein gattungsgemäßes Kühl- und/der Gefriergerät hinsichtlich seiner erzielbaren Energieeffizienz zu verbessern.The present application therefore sets itself the goal of improving a generic refrigerator and / or freezer in terms of its achievable energy efficiency.
Zur Aufgabenlösung wird ein Kühl- und/oder Gefriergerät gemäß den Merkmalen des Anspruchs 1 vorgeschlagen. Vorteilhafte Ausgestaltungen des Kühl- und/oder Gefriergerätes sind Gegenstand der abhängigen Ansprüche.To solve the task, a refrigerator and / or freezer according to the features of claim 1 is proposed. Advantageous embodiments of the refrigerator and / or freezer are the subject of the dependent claims.
Erfindungsgemäß wird für ein gattungsgemäßes Kühl- und/oder Gefriergerät vorgeschlagen, dieses mit wenigstens einem Regelungsmodul auszustatten, das eine Drehzahl- und/oder Betriebsspannungsregelung des wenigstens einen Ventilators ermöglicht. Das Regelungsmodul umfasst einen implementierten Regelkreis mit der Betriebsspannung/Drehzahl des Ventilators als Regelgröße. Als Einflussgröße kann eine Störgröße des implementierten Regelkreises verstanden werden. Vorstellbar ist es ebenfalls, dass die Einflussgröße unmittelbaren Einfluss auf die Sollgröße des Regelkreises hat, d.h. die Soll-Drehzahl bzw. Soll-Spannung des Ventilators wird in Abhängigkeit der Einflussgröße festgelegt. Unabhängig davon nimmt die Einflussgröße Einfluss auf die tatsächlich eingestellte Drehzahl, mit der der Ventilator letztendlich betrieben wird. Ein oder mehrere Einflussgrößen beschreiben vorzugsweise aktuelle Betriebsbedingungen des Kältemittelkreislaufs. Gegenüber herkömmlichen Kühl- und/oder Gefriergeräten, deren Ventilatoren mit konstanter Drehzahl betrieben werden, wird durch die erfindungsgemäße Ausgestaltung ein energieeffizienterer Betrieb ermöglicht. Die implementierte Regelung stellt sicher, dass der Ventilator stets mit der optimalen Drehzahl in Abhängigkeit der aktuell vorliegenden Betriebsbedingungen des Kältemittelkreislaufs gefahren wird. Zu jedem Zeitpunkt bzw. für jede Umgebungsbedingung liegt daher eine optimale Effizienz des Gesamtgerätes vor.According to the invention for a generic refrigerator and / or freezer is proposed to equip this with at least one control module that allows a speed and / or operating voltage control of at least one fan. The control module includes an implemented control loop with the operating voltage / speed of the fan as a controlled variable. As an influencing variable, a disturbance variable of the implemented control loop can be understood. It is also conceivable that the influencing variable has a direct influence on the nominal size of the control loop, i. The setpoint speed or setpoint voltage of the fan is determined as a function of the influencing variable. Irrespective of this, the influencing variable influences the actual set speed with which the fan is finally operated. One or more influencing variables preferably describe current operating conditions of the refrigerant circuit. Compared to conventional refrigerators and / or freezers, whose fans are operated at a constant speed, a more energy-efficient operation is made possible by the inventive design. The implemented control ensures that the fan is always run at the optimum speed depending on the current operating conditions of the refrigerant circuit. At any time or for any environmental condition, therefore, there is an optimal efficiency of the entire device.
Es wird darauf hingewiesen, dass sich das erfindungsgemäße Regelungsmodul klar von einer einfachen Ein/Aus-Steuerung eines Ventilators innerhalb eines konventionellen Kühl- und/oder Gefriergerätes unterscheidet. Durch den implementierten Regelkreis kann der Ventilator mit unterschiedlichen Drehzahlen innerhalb einer Drehzahlspanne gefahren werden.It should be noted that the control module of the invention clearly from a simple on / off control of a fan within a conventional Refrigerator and / or freezer differs. Through the implemented control circuit, the fan can be driven at different speeds within a speed range.
Das Regelungsmodul kann eine einzige oder auch mehrere Einflussgrößen parallel berücksichtigen. Denkbar ist es ebenfalls, dass das Regelungsmodul eine Vielzahl an Einflussgrößen für die Regelung berücksichtigen kann, allerdings situationsabhängig lediglich ein oder mehrere Einflussgrößen aus der verfügbaren Vielzahl auswählt und für die Regelung tatsächlich berücksichtigt.The control module can take into account a single or several influencing variables in parallel. It is also conceivable that the control module can take into account a large number of influencing variables for the control, but, depending on the situation, selects only one or more influencing variables from the available multiplicity and actually takes them into account for the control.
Ein oder mehrere geregelte Ventilatoren können beispielsweise im Bereich der Wärmeübertrager vorgesehen sein, d.h. idealerweise ist ein Ventilator im Bereich des Verdampfers und/oder ein weiterer Ventilator im Bereich des Verflüssigers angeordnet. Durch die Belüftung der genannten Komponenten wird der Wärmeübergang gefördert.For example, one or more controlled fans may be provided in the area of the heat exchangers, i. Ideally, a fan is arranged in the region of the evaporator and / or a further fan in the region of the condenser. Through the ventilation of the components mentioned, the heat transfer is promoted.
Zudem kann ein geregelter Ventilator im Kühlraum des Kühl- und/oder Gefriergerätes angeordnet sein, um dort für eine bessere Luftzirkulation und Temperaturverteilung zu sorgen. Durch die Abhängigkeit der Ventilatordrehzahl von den Betriebsbedingungen des Kältekreislaufs lassen sich die Ventilatoren energieeffizienter betreiben indem diese stets auf die situationsabhängig optimale Drehzahl eingestellt werden. Dies vergrößert zudem den Gestaltungsfreiraum bei der Auslegung des Kältekreislaufs, denn durch die optimierte Wärmeübertragung können Durchflüsse oder Füllmengen mit größerem Spielraum festgelegt werden. Zum Beispiel muss bei einer Raumtemperatur von 16°C die Drehzahl des Sockelventilators, der zur Belüftung des Verflüssigers dient, gesenkt werden, um diesen nicht zu stark abzukühlen. Dort würde sich ansonsten Kältemittel sammeln und die Druckdifferenz zum Verdampfer könnte absinken, sodass auch der Massestrom zu stark absinkt.In addition, a controlled fan can be arranged in the cooling space of the refrigerator and / or freezer, in order to ensure better air circulation and temperature distribution there. Due to the dependence of the fan speed on the operating conditions of the refrigeration circuit, the fans can be operated more energy-efficiently by always setting them to the optimum speed depending on the situation. This also increases the freedom of design in the design of the refrigeration cycle, because through the optimized heat transfer flows or quantities can be set with greater latitude. For example, at a room temperature of 16 ° C, the speed of the base fan, which serves to aerate the condenser, must be lowered so as not to over-cool it. Otherwise, there would collect refrigerant and the pressure difference to the evaporator could drop, so that the mass flow drops too much.
Bevorzugt berücksichtigt das Regelungsmodul als Einflussgröße die aktuelle Verdampfertemperatur und/oder eine Abweichung zwischen Soll- und Ist-Temperatur des Verdampfers. Ebenfalls kann als Einflussgröße die aktuelle Verflüssigertemperatur und/oder eine Abweichung zwischen Ist- und Soll-Temperatur des Verflüssigers berücksichtigt werden. Im Endeffekt lässt sich dadurch die Verdampfer- und/oder Verflüssigertemperatur durch die Regelung der Ventilatordrehzahl beeinflussen und gezielt regeln.Preferably, the control module takes into account as an influencing variable the current evaporator temperature and / or a deviation between the setpoint and actual temperature of the evaporator. Likewise, the influencing variable can be the current condenser temperature and / or a deviation between the actual and desired temperature of the condenser are taken into account. As a result, the evaporator and / or condenser temperature can be influenced and regulated in a targeted manner by the regulation of the fan speed.
Denkbar ist es auch, dass als Einflussgröße die aktuelle Umgebungstemperatur und/oder Kühlraumtemperatur durch das Regelungsmodul berücksichtigt wird. Auch kann eine Abweichung zwischen Soll- und Ist-Temperatur des Kühlraums für die Drehzahlregelung des Ventilators als Einflussgröße herangezogen werden. Dies ist insbesondere für einen innerhalb des Kühlraums angeordneten Ventilator sinnvoll.It is also conceivable that the current ambient temperature and / or cold room temperature is taken into account by the control module as an influencing variable. Also, a deviation between the setpoint and actual temperature of the cooling space for the speed control of the fan can be used as an influencing variable. This is particularly useful for a fan arranged within the refrigerator.
Ferner ist es vorstellbar, dass das Regelungsmodul als Einflussgröße die aktuelle Kompressordrehzahl und/oder Leistungsaufnahme des Kompressors berücksichtigt. Demzufolge ist es möglich, den Ventilator nur dann anzusteuern bzw. auf eine gewisse optimale Drehzahl zu regeln, wenn der Kompressor tatsächlich läuft bzw. anspringt. Auch eine entsprechende Regelung zur Einstellung einer Nachlaufzeit des Ventilators nach dem Abschalten des Kompressors ist vorstellbar. Denkbar ist es ebenfalls, wenigstens einen Ventilator in Abhängigkeit der Drehzahl eines wenigstens weiteren Ventilators zu regeln. Darüber hinaus ist es vorstellbar, als weitere Einflussgröße für das Regelungsmodul die Stellung von einem oder mehreren Kältemittelventilen zu berücksichtigen. Als Beispiel sei die Berücksichtigung der Ventilstellung eines Stoppventils, eines Zwei- bzw. Dreiwegeventils oder auch des Expansionsventils des Kältemittelkreislaufs genannt.Furthermore, it is conceivable that the control module takes into account as an influencing variable the current compressor speed and / or power consumption of the compressor. Accordingly, it is possible to control the fan only or to control to a certain optimum speed when the compressor is actually running or starts. A corresponding regulation for setting a follow-up time of the fan after switching off the compressor is conceivable. It is also conceivable to regulate at least one fan as a function of the speed of an at least one further fan. In addition, it is conceivable to take into account the position of one or more refrigerant valves as a further influencing variable for the control module. As an example, the consideration of the valve position of a stop valve, a two- or three-way valve or the expansion valve of the refrigerant circuit may be mentioned.
Wie bereits vorangehend erläutert ist es möglich, lediglich eine oder mehrere Einflussgrößen aus einer Vielzahl verfügbarer Einflussgrößen auszuwählen und für die Regelung zu berücksichtigen. Die Auswahl kann automatisiert durch das Regelungsmodul erfolgen, bspw. wird stets diejenige Einflussgröße für die Regelung berücksichtigt, die die größten Auswirkungen auf den durch den geregelten Ventilator zu belüftenden Bereich bzw. die zu belüftende Komponente zeigt. Die Regelung der Spannung bzw. Drehzahl kann während der Laufzeit jedoch auch in Abhängigkeit mehrerer bzw. aller verfügbaren Einflussgrößen erfolgen.As already explained above, it is possible to select only one or more influencing variables from a multiplicity of available influencing variables and to take these into account for the regulation. The selection can be made automatically by the control module, for example, always that influencing variable for the control is taken into account, which shows the greatest impact on the area to be ventilated by the controlled fan or the component to be ventilated. The regulation However, the voltage or rotational speed can also take place during runtime as a function of several or all available influencing variables.
Für den Regelkreis kann bevorzugt ein lineares Übertragungsverhalten angenommen werden. Es bietet sich in diesem Fall die Verwendung einer linearen Übertragungsfunktion an, bspw. mit wenigstens zwei Stützstellen und optionaler Korrelation. Als Stützstellen dient beispielsweise ein Minimal- bzw. Maximalwert für die Regelgröße. Zwischen diesen beiden Stützstellen wird bevorzugt in üblicher Weise interpoliert. Auch die Verwendung von nicht auf die Endpunkte fallender Stützstellen ist möglich. In diesem Fall könnte zwischen den beiden Stützstellen interpoliert und außerhalb der beiden Stützstellen extrapoliert werden.For the control loop, preferably a linear transmission behavior can be assumed. In this case, it makes sense to use a linear transfer function, for example with at least two interpolation points and optional correlation. For example, a minimum or maximum value for the control variable is used as interpolation points. Between these two nodes is preferably interpolated in the usual way. It is also possible to use interpolation points that do not fall on the endpoints. In this case, it would be possible to interpolate between the two interpolation points and to extrapolate outside the two interpolation points.
Auch die Verwendung einer nicht-linearen Übertragungsfunktion ist vorstellbar, bspw. eine logarithmische und/oder ein polynombasierte Funktion und/oder Exponentialfunktion. Anstelle der Implementierung einer Übertragungsfunktion innerhalb des Regelungsmoduls kann das Regelungsmodul auch eine Kennfeldregelung vorsehen. Dazu lassen sich innerhalb des Regelungsmoduls bevorzugt ein oder mehrere Kennfelder hinterlegen, die zur Regelung abrufbar sind.The use of a non-linear transfer function is also conceivable, for example a logarithmic and / or polynomial-based function and / or exponential function. Instead of implementing a transfer function within the control module, the control module may also provide a map control. For this purpose, one or more maps can be stored within the control module, which are retrievable for control.
An dieser Stelle wird darauf hingewiesen, dass die Begriffe "ein" und "eine" nicht zwingend auf genau eines der Elemente verweisen, wenngleich dies eine mögliche Ausführung darstellt, sondern auch eine Mehrzahl der Elemente bezeichnen können. Ebenso schließt die Verwendung des Plurals auch das Vorhandensein des fraglichen Elementes in der Einzahl ein und umgekehrt umfasst der Singular auch mehrere der fraglichen Elemente.It should be noted at this point that the terms "a" and "an" do not necessarily refer to exactly one of the elements, although this is one possible embodiment, but may also designate a plurality of the elements. Likewise, the use of the plural also includes the presence of the element in question in the singular, and vice versa, the singular also includes several of the elements in question.
Im Folgenden soll die Erfindung anhand eines Ausführungsbeispiels näher beschrieben werden.In the following, the invention will be described with reference to an embodiment.
Als Ausführungsbeispiel wird ein Kühl- und/oder Gefriergerät beschrieben, mit einem entsprechenden Kühlmittelkreislauf. Das Gerät ist zusätzlich mit einem Ventilator im Bereich des Verdampfers sowie einem gesondertem Ventilator im Bereich des Verflüssigers ausgestattet. Beide Ventilatoren werden durch ein spezielles Regelungsmodul der Gerätesteuerung auf eine gewünschte Soll-Drehzahl geregelt, um den Wärmeübergang an den jeweils belüfteten Bauteilen zu fördern. Die Soll-Drehzahl wird dabei in Abhängigkeit der aktuellen Betriebsbedingungen des Kältemittelkreislaufs variabel eingestellt, um für jede Situation und Umgebungsbedingung sicherzustellen, dass der Ventilator mit einer optimalen Drehzahl betrieben wird. Hierbei ist darauf zu achten, dass die Energiebilanz zwischen erforderlicher Antriebsenergie des Ventilators und Energiegewinn durch die Belüftung optimal ist. Darüber hinaus soll durch die Regelung sichergestellt werden, dass der Ventilator keinen negativen Einfluss auf die Effizienz sonstiger Komponenten des Kühlmittelkreislaufs hat.As an exemplary embodiment, a refrigerator and / or freezer is described, with a corresponding coolant circuit. The unit is additionally equipped with a fan in the area of the evaporator and a separate fan in the area equipped with the condenser. Both fans are controlled by a special control module of the device control to a desired target speed to promote the heat transfer to the respective ventilated components. The setpoint speed is set variably in dependence on the current operating conditions of the refrigerant circuit in order to ensure that the fan is operated at an optimum speed for each situation and ambient condition. It is important to ensure that the energy balance between the required drive energy of the fan and energy gain through the ventilation is optimal. In addition, it should be ensured by the regulation that the fan has no negative impact on the efficiency of other components of the coolant circuit.
Für die Regelung des dem Verflüssiger zugeordneten Ventilators ist beispielsweise vorgesehen, als Eingangsgrößen für dessen Drehzahlregelung die aktuelle Umgebungstemperatur sowie die derzeit gefahrene Kompressordrehzahl zu berücksichtigen. Hierdurch lässt sich eine gezielte Beeinflussung und auch Regelung der Verflüssigungstemperatur innerhalb des Verflüssigers erreichen. In diesem Sinne kann ebenfalls die aktuelle Ist- und Solltemperatur des Verflüssigers für die Regelung der Ventilatordrehzahl als Einflussgröße berücksichtigt werden. Allgemein lässt sich hierdurch generell eine Steuerung der Kältemittelverteilung innerhalb des Kältemittelkreislaufs erzielen bzw. die Verflüssigungs- und/oder Verdampfungs- und/oder Saugleitungstemperatur gezielt steuern.For the control of the fan associated with the condenser, it is provided, for example, to take into account as input variables for the speed control of the current ambient temperature and the currently driven compressor speed. This makes it possible to achieve a targeted influencing and also regulation of the liquefaction temperature within the liquefier. In this sense, the current actual and setpoint temperature of the condenser for the control of the fan speed can also be taken into account as an influencing variable. In general, it is thus generally possible to achieve a control of the refrigerant distribution within the refrigerant circuit or to control the liquefaction and / or evaporation and / or suction line temperature in a targeted manner.
Die durch das Regelungsmodul der Gerätesteuerung ausgeführte Regelung des dem Verdampfer zugeordneten Ventilators sieht vor, diesen in Abhängigkeit des Kompressorzustandes als auch der Kompressordrehzahl zu regeln. Beispielsweise wird der Ventilator nur dann betrieben, wenn der Kompressor aktiv ist. Gegebenenfalls kann eine Nachlaufzeit des Ventilators nach Kompressorabschaltung vorgesehen sein. Die Drehzahlregelung sieht eine prozentuale Einstellung der Ventilatordrehzahl zwischen einem minimalen und maximalen Wert in Abhängigkeit der Leistungsaufnahme des Kompressors vor.The regulation of the fan associated with the evaporator, which is carried out by the control module of the device control, provides for regulating this in dependence on the compressor state as well as on the compressor speed. For example, the fan is operated only when the compressor is active. Optionally, a lag time of the fan may be provided after compressor shutdown. The speed control provides a percentage adjustment of the fan speed between a minimum and maximum value depending on the power consumption of the compressor.
Das Kühl- und/oder Gefriergerät ist ergänzend mit einem innerhalb des Kühlraumes angeordneten Ventilator ausgestattet, der für eine bessere Luftzirkulation und Temperaturverteilung innerhalb des Kühlraumes sorgt. Die Drehzahlregelung dieses Ventilators berücksichtigt als Einflussgrößen die Kompressordrehzahl als auch die aktuelle Thermostateinstellung zur Regulierung der Innenraumtemperatur. Ebenfalls lässt sich die gemessene Innentemperatur als auch deren Abweichung von der eingestellten Solltemperatur berücksichtigen. Durch die laufende Regelung der Ventilatordrehzahl kann eine bessere Kälteleistung insbesondere bei tieferen Temperatureinstellungen erreicht werden. Zudem wird dadurch eine gleichmäßige kalte Temperaturverteilung im Kühlraum insbesondere bei tieferen Temperatureinstellungen erzielt.The refrigerator and / or freezer is additionally equipped with a fan arranged inside the cold room, which ensures better air circulation and temperature distribution within the cold room. The speed control of this fan takes into account the compressor speed as well as the current thermostat setting to regulate the interior temperature. The measured internal temperature as well as its deviation from the set target temperature can also be taken into account. Due to the continuous control of the fan speed, a better cooling capacity can be achieved, especially at lower temperature settings. In addition, a uniform cold temperature distribution in the refrigerator is achieved in particular at lower temperature settings.
Claims (12)
dadurch gekennzeichnet,
dass wenigstens ein Regelungsmodul zur Regelung der Drehzahl und/oder Betriebsspannung des wenigstens einen Ventilators in Abhängigkeit ein oder mehrerer Einflussgrößen vorgesehen ist.Refrigerating and / or freezing appliance with a refrigerant circuit, comprising at least one evaporator and at least one condenser, and with at least one fan for targeted ventilation of a device area or a device component,
characterized,
in that at least one control module is provided for controlling the rotational speed and / or operating voltage of the at least one fan as a function of one or more influencing variables.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017119090 | 2017-08-21 | ||
| DE102017127471.5A DE102017127471A1 (en) | 2017-08-21 | 2017-11-21 | Refrigerator and / or freezer with fan |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3447410A2 true EP3447410A2 (en) | 2019-02-27 |
| EP3447410A3 EP3447410A3 (en) | 2019-04-17 |
| EP3447410B1 EP3447410B1 (en) | 2021-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| EP18190003.6A Active EP3447410B1 (en) | 2017-08-21 | 2018-08-21 | Refrigeration and/or freezer device with ventilator |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3706152A1 (en) * | 1987-02-26 | 1988-09-08 | Sueddeutsche Kuehler Behr | METHOD FOR CONTROLLING A VEHICLE AIR CONDITIONER AND VEHICLE AIR CONDITIONER FOR IMPLEMENTING THE METHOD |
| DE102007025727B4 (en) * | 2007-06-01 | 2018-01-11 | Audi Ag | Method for controlling a fan and air conditioning for a vehicle |
| DE202008000757U1 (en) * | 2007-12-28 | 2009-04-30 | Liebherr-Hausgeräte Ochsenhausen GmbH | Fridge and / or freezer |
| US20100094466A1 (en) * | 2008-10-14 | 2010-04-15 | Libert Corporation | Integrated quiet and energy efficient modes of operation for air-cooled condenser |
| US9752811B2 (en) * | 2011-02-16 | 2017-09-05 | Wellington Drive Technologies Limited | Refrigeration controller that reduces operational noise |
| EP2653807A1 (en) * | 2012-04-20 | 2013-10-23 | Danfoss A/S | A method of controlling one or more fans of a heat rejecting heat exchanger |
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| EP3447410A3 (en) | 2019-04-17 |
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