EP2527766A1 - Refrigerator - Google Patents

Refrigerator Download PDF

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Publication number
EP2527766A1
EP2527766A1 EP11004227A EP11004227A EP2527766A1 EP 2527766 A1 EP2527766 A1 EP 2527766A1 EP 11004227 A EP11004227 A EP 11004227A EP 11004227 A EP11004227 A EP 11004227A EP 2527766 A1 EP2527766 A1 EP 2527766A1
Authority
EP
European Patent Office
Prior art keywords
control
control unit
evaporator chamber
cooling
evaporator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11004227A
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German (de)
French (fr)
Inventor
Erfindernennung liegt noch nicht vor Die
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.)
V-Zug AG
Original Assignee
Forster Kuechen- & Kuehltechnik AG
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Publication date
Application filed by Forster Kuechen- & Kuehltechnik AG filed Critical Forster Kuechen- & Kuehltechnik AG
Priority to EP11004227A priority Critical patent/EP2527766A1/en
Publication of EP2527766A1 publication Critical patent/EP2527766A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • 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
    • F25D17/042—Air treating means within refrigerated spaces
    • F25D17/045—Air flow control arrangements
    • 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
    • F25D17/062—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 in household refrigerators
    • F25D17/065—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 in household refrigerators with compartments at different temperatures

Definitions

  • the invention relates to a refrigerator with at least two preferably arranged one above the other cooling compartments, which are cooled with an evaporator circulating cooling air, wherein the evaporator is arranged in a separate evaporator chamber and control means for closing and opening the communication paths between the evaporator chamber and the individual refrigerators are available.
  • Such refrigerators usually have at least one main refrigerator and an underlying freezer, the former often contains several special refrigerators. As a result, the refrigerator requires a complicated control with a plurality of control means for the various refrigerators.
  • the invention has for its object to provide the refrigerator with a space-saving and easily accessible control device, which is structurally simple and yet ensures the functional operation of the refrigerator.
  • control means for the individual cooling compartments are integrated in a central control unit, which is preferably installed in the rear space of the refrigerator near the evaporator chamber.
  • the inventive control unit has a compact design and can be installed in an easily accessible installation position, preferably directly above the adjacent to a rear wall of the freezer compartment evaporator.
  • control unit is formed by a directional control valve with Heilzu- and HeilschreibGermanan Beingn for the evaporator chamber and the individual cooling compartments, expediently each for each compartment separate air supply connection and a common cooling compartments air return port are available.
  • the invention also provides that for defrosting the evaporator, the control unit can be brought into a control position in which the Luftzu- and Heilschreib technologicalaniere the evaporator chamber can be connected directly to each other via a defrost bypass.
  • the invention also relates to a control valve for the inventive control unit, with a valve housing and a rotatable control member which is adjustable between a plurality of control positions defined by rotation angle.
  • control member is a hollow roller with connecting channels, which are delimited from each other by radial longitudinal webs.
  • control member is multi-part, with two control flaps for the air return from the cooling compartments and an intermediate and coaxial with them rotatable hollow ball for controlling the air supply to the individual compartments.
  • the inventive refrigerator 1 is in the variant according to Fig. 1 and
  • Fig. 2 equipped with four superposed cooling compartments 2, 3, 4 and 5, wherein the lower cooling compartment 5 is designed as a freezer compartment.
  • the cooling compartments 2 to 5 are closed with doors 6, 7.
  • doors 6, 7 Of course, only two or a different number of cooling compartments could be provided, one of which is preferably designed as a freezer compartment.
  • a separate evaporator chamber 9 On the rear wall 8 of the freezer compartment 5 is adjacent a separate evaporator chamber 9, in which an evaporator 10 is arranged substantially upright.
  • the evaporator forms part of a equipped with a compressor and a condenser cooling circuit, which are not shown in detail.
  • the intended for the cooling air is fed from above into the evaporator chamber 9. It flows through an outer part 9a of the evaporator chamber 9 down and then from below through the evaporator 10 therethrough.
  • a number of inlet openings 12 is provided, via which the cooling air is introduced into the freezer compartment 5, wherein in this by means of a fan circulating cooling air flows back into the evaporator 10 via a number of provided in the lower part of the partition wall 11 outlet openings 13.
  • the temperature in the freezer 5 is controlled so that the inlet openings 12 are closed when a certain target value is reached.
  • the cooling compartments 2, 3 and 4 each have a supply line 15 and a respective return line 16, which are connected to corresponding connections of a central control unit 17. This controls the inflow and return of the cooling air through these lines as a function of the respective temperature setpoint of the individual cooling compartments.
  • a temperature setpoint of 4 to 5 ° C for the main refrigerator compartment 2 set by 3 ° C for the special refrigerator compartment 3 and 0 ° C for the special refrigerator compartment 4.
  • control unit 17 is formed by a control valve 18 which is composed of a valve housing 18a and a hollow roller 19 serving as a control member 18b, the latter being rotatable in the valve housing 18a by means of a stepping motor 20 as a drive member.
  • the valve housing 18a is arranged directly above the evaporator chamber 9 and has on the one hand air supply connections 21 and an air return connection 22 to which corresponding supply and return lines of the evaporation chamber 9 can be connected.
  • the valve housing 18 has separate air supply ports 23, 24, 25 and a common air return port 26 for the supply and return lines 15, 16 of the individual cooling compartments.
  • the control unit 17 is characterized by a compact design, and can be easily and quickly adjusted to the required control position.
  • Fig. 4 to Fig. 7 are located in the hollow roller 19 radial longitudinal webs 27, which are aligned such that the hollow roller 19 defines the different opening or closing positions of the individual air supply ports at a rotation about a particular preferably same rotation angle.
  • each of the cooling compartments 2, 3, 4 can be supplied with cooling air independently of the others.
  • the flow direction of the cooling air is indicated by arrows.
  • the control unit 17 takes in Fig. 7 shown control position in which all supply and return ports 23 to 26 of the cooling compartments 2, 3 and 4 are closed, while the supply and return ports 21, 22 of the evaporator chamber 9 are connected directly to each other via a defrost bypass 29 of the hollow cylinder 19.
  • the inlet and outlet openings 12, 13 of the freezer compartment 5 are closed, so that even in this no air circulation takes place and the air circulates only in the interior of the evaporator chamber 9 through the evaporator 10. This ensures rapid defrosting of the evaporator, especially if the air in the evaporator chamber 9, for example, with a heating coil 35 is temporarily heated.
  • control unit 17 is illustrated by a control valve 28, which is suitable for a refrigerator with only one refrigerated compartment 2 and a freezer compartment 5.
  • This control valve 28 has a control member 28b, which is designed so that it consists of two control flaps 30, 31 for controlling the air return from the cooling compartments 2 and 5 and an intermediate and coaxial with them rotatable hollow cylinder 32 for controlling the air supply to the cooling compartments 2 and 5 composed.
  • the control flaps 30, 31 and the hollow cylinder 32 can be positioned by means of the stepping motor 20 in the control positions defined by the rotation angle.
  • control flap 30 In the tax position according to Fig. 8 the control flap 30 is closed, so that the suction line of the refrigerating compartment 2 is closed.
  • control flap 31 On the other hand, the control flap 31 is open, so that the suction line of the freezer compartment 5 is also open.
  • the hollow cylinder 32 is in turn in a first rotational position in which it holds open the purging of the freezer compartment 5 through the opening 33.
  • control flap 30 In the tax position according to Fig. 9 the control flap 30 is open, so that the suction line of the main refrigerator compartment 2 is open.
  • control flap 31 On the other hand, the control flap 31 is closed, so that the suction line of the freezer compartment 5 is also closed.
  • the hollow ball 32 is in turn in a second rotational position in which it holds the discharge line of the main cooling compartment 2 through the opening 34.
  • the inventive control unit 17 is characterized in that it ensures the functional control of the cooling air circuits with simple means. In addition, it is space-saving and easy to install, which brings considerable advantages in particular in assembly, maintenance and repair work.
  • the control valve 18 can be made without much effort as a mass product.
  • control valve 18 could have more or fewer supply and return ports than illustrated. Also, more than one control member 18b may be provided, each with a drive member.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The refrigerator has a control unit integrated in a central control unit at rear area of an evaporator chamber of the refrigerator. The control unit is provided for closing and opening the connecting paths between the evaporator chamber and individual cooling fans. The control unit is formed by a control valve (18), whose valve housing (18a) is provided with the air supply ports (21,23,24,25) and the air return ports (22,26) for the evaporator chamber and the individual cooling fans. The air supply- and air return ports are directly connected to the evaporator chamber through a defrost bypass. An independent claim is provided for a control unit with a stepper motor adjusted as a drive element.

Description

Die Erfindung betrifft einen Kühlschrank mit mindestens zwei vorzugsweise übereinander angeordneten Kühlfächern, die mit über einen Verdampfer umgewälzter Kühlluft kühlbar sind, wobei der Verdampfer in einer separaten Verdampferkammer angeordnet ist und Steuermittel zum Verschliessen und Öffnen der Verbindungswege zwischen der Verdampferkammer und den einzelnen Kühlfächern vorhanden sind.The invention relates to a refrigerator with at least two preferably arranged one above the other cooling compartments, which are cooled with an evaporator circulating cooling air, wherein the evaporator is arranged in a separate evaporator chamber and control means for closing and opening the communication paths between the evaporator chamber and the individual refrigerators are available.

Derartige Kühlschränke besitzen in der Regel mindestens ein Hauptkühlfach und ein darunterliegendes Tiefkühlfach, wobei ersteres oft mehrere Sonderkühlfächer mit enthält. Der Kühlschrank benötigt infolgedessen eine aufwendige Steuerung mit einer Vielzahl von Steuermitteln für die verschiedenen Kühlfächer.Such refrigerators usually have at least one main refrigerator and an underlying freezer, the former often contains several special refrigerators. As a result, the refrigerator requires a complicated control with a plurality of control means for the various refrigerators.

Der Erfindung liegt die Aufgabe zugrunde, den Kühlschrank mit einer möglichst platzsparenden und gut zugänglichen Steuereinrichtung zu versehen, die konstruktiv einfach ist und dennoch den funktionsgerechten Betrieb des Kühlschrankes sicherstellt.The invention has for its object to provide the refrigerator with a space-saving and easily accessible control device, which is structurally simple and yet ensures the functional operation of the refrigerator.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass die Steuermittel für die einzelnen Kühlfächer in einer zentralen Steuereinheit integriert sind, die vorzugsweise im Rückraum des Kühlschranks nahe der Verdampferkammer eingebaut ist.This object is achieved according to the invention in that the control means for the individual cooling compartments are integrated in a central control unit, which is preferably installed in the rear space of the refrigerator near the evaporator chamber.

Die erfindungsgemässe Steuereinheit weist eine kompakte Bauweise auf und kann dadurch in einer gut zugänglichen Einbaulage eingebaut werden, vorzugsweise direkt über dem an einer Rückwand des Tiefkühlfaches angrenzenden Verdampfer.The inventive control unit has a compact design and can be installed in an easily accessible installation position, preferably directly above the adjacent to a rear wall of the freezer compartment evaporator.

Die Erfindung sieht ferner vor, dass die Steuereinheit durch ein Wegeventil mit Luftzu- und Luftrückführanschlüssen für die Verdampferkammer und die einzelnen Kühlfächer gebildet ist, wobei zweckmässigerweise je ein für jedes Kühlfach separater Luftzuführanschluss und ein allen Kühlfächern gemeinsamer Luftrückführanschluss vorhanden sind.The invention further provides that the control unit is formed by a directional control valve with Luftzu- and Luftrückführanschlüssen for the evaporator chamber and the individual cooling compartments, expediently each for each compartment separate air supply connection and a common cooling compartments air return port are available.

Die Erfindung sieht ausserdem vor, dass zum Abtauen des Verdampfers die Steuereinheit in eine Steuerstellung bringbar ist, in welcher die Luftzu- und Luftrückführanschlüsse der Verdampferkammer direkt miteinander über einen Defrost-Bypass verbindbar sind.The invention also provides that for defrosting the evaporator, the control unit can be brought into a control position in which the Luftzu- and Luftrückführanschlüsse the evaporator chamber can be connected directly to each other via a defrost bypass.

Die Erfindung betrifft auch ein Steuerventil für die erfindungsgemässe Steuereinheit, mit einem Ventilgehäuse und einem darin drehbaren Steuerorgan, das zwischen mehreren durch Drehwinkel definierten Steuerstellungen verstellbar ist.The invention also relates to a control valve for the inventive control unit, with a valve housing and a rotatable control member which is adjustable between a plurality of control positions defined by rotation angle.

In einer bevorzugten Variante ist das Steuerorgan eine Hohlwalze mit Verbindungskanälen, die voneinander durch radiale Längsstege abgegrenzt sind.In a preferred variant, the control member is a hollow roller with connecting channels, which are delimited from each other by radial longitudinal webs.

In einer anderen Variante ist das Steuerorgan mehrteilig, mit zwei Steuerklappen für die Luftrückführung aus den Kühlfächern sowie einer dazwischenliegenden und koaxial mit ihnen drehbaren Hohlkugel für die Steuerung der Luftzuführung zu den einzelnen Kühlfächern.In another variant, the control member is multi-part, with two control flaps for the air return from the cooling compartments and an intermediate and coaxial with them rotatable hollow ball for controlling the air supply to the individual compartments.

Die Erfindung wird nachfolgend anhand zweier Ausführungsbeispiele unter Bezugnahme auf die schematischen Zeichnungen näher erläutert. Es zeigen:

Fig. 1
einen Längsschnitt eines erfindungsgemässen Kühlschranks,
Fig. 2
einen Querschnitt des Kühlschranks nach Fig. 1,
Fig. 3
ein Ausführungsbeispiel einer erfindungsgemässen Steuereinheit für den Kühlschrank nach Fig. 1, perspektivisch dargestellt,
Fig. 4 bis Fig. 7
die Steuereinheit nach Fig. 3, in vier verschiedenen Steuerstellungen dargestellt,
Fig. 8 und Fig. 9
ein Ausführungsbeispiel einer erfindungsgemässen Steuereinheit für den Kühlschrank nach Fig. 1, in zwei verschiedenen Steuerstellungen und ebenfalls perspektivisch dargestellt.
The invention will be explained in more detail below with reference to two exemplary embodiments with reference to the schematic drawings. Show it:
Fig. 1
a longitudinal section of a refrigerator according to the invention,
Fig. 2
a cross section of the refrigerator after Fig. 1 .
Fig. 3
an embodiment of an inventive control unit for the refrigerator after Fig. 1 , shown in perspective,
Fig. 4 to Fig. 7
the control unit after Fig. 3 , shown in four different control positions,
FIGS. 8 and 9
an embodiment of an inventive control unit for the refrigerator after Fig. 1 , in two different control positions and also shown in perspective.

Der erfindungsgemässe Kühlschrank 1 ist in der Variante nach Fig. 1 undThe inventive refrigerator 1 is in the variant according to Fig. 1 and

Fig. 2 mit vier übereinander angeordneten Kühlfächern 2, 3, 4 und 5 ausgestattet, wobei das untere Kühlfach 5 als Tiefkühlfach ausgelegt ist. Die Kühlfächer 2 bis 5 sind mit Türen 6, 7 verschliessbar. Selbstverständlich könnten auch nur zwei oder eine andere Anzahl von Kühlfächern vorgesehen sein, von denen vorzugsweise eines als Tiefkühlfach ausgebildet ist. Fig. 2 equipped with four superposed cooling compartments 2, 3, 4 and 5, wherein the lower cooling compartment 5 is designed as a freezer compartment. The cooling compartments 2 to 5 are closed with doors 6, 7. Of course, only two or a different number of cooling compartments could be provided, one of which is preferably designed as a freezer compartment.

An der Rückwand 8 des Tiefkühlfaches 5 grenzt eine separate Verdampferkammer 9, in der ein Verdampfer 10 im wesentlichen aufrecht angeordnet ist. Der Verdampfer bildet einen Teil eines mit einem Kompressor und einem Kondensator ausgestatteten Kühlkreislaufes, die nicht näher gezeigt sind.On the rear wall 8 of the freezer compartment 5 is adjacent a separate evaporator chamber 9, in which an evaporator 10 is arranged substantially upright. The evaporator forms part of a equipped with a compressor and a condenser cooling circuit, which are not shown in detail.

Die für die Kühlung vorgesehene Luft wird von oben in die Verdampferkammer 9 geführt. Sie strömt durch einen Aussenteil 9a der Verdampferkammer 9 nach unten und dann von unten durch den Verdampfer 10 hindurch. Im oberen Bereich einer zwischen der Verdampferkammer 9 und dem Tiefkühlfach 5 vorhandenen Trennwand 11 ist eine Anzahl von Eintrittsöffnungen 12 vorgesehen, über welche die Kühlluft in das Tiefkühlfach 5 eingeleitet wird, wobei die in diesem mit Hilfe eines Ventilators zirkulierende Kühlluft wieder in den Verdampfer 10 über eine Anzahl von im unteren Bereich der Trennwand 11 vorgesehenen Austrittsöffnungen 13 zurückströmt. Die Temperatur im Tiefkühlschrank 5 wird so geregelt, dass bei Erreichen eines bestimmten Sollwertes die Eintrittsöffnungen 12 verschlossen werden.The intended for the cooling air is fed from above into the evaporator chamber 9. It flows through an outer part 9a of the evaporator chamber 9 down and then from below through the evaporator 10 therethrough. In the upper part of a present between the evaporator chamber 9 and the freezer compartment 5 partition 11, a number of inlet openings 12 is provided, via which the cooling air is introduced into the freezer compartment 5, wherein in this by means of a fan circulating cooling air flows back into the evaporator 10 via a number of provided in the lower part of the partition wall 11 outlet openings 13. The temperature in the freezer 5 is controlled so that the inlet openings 12 are closed when a certain target value is reached.

Die Kühlfächer 2, 3 und 4 weisen je eine Zuführleitung 15 und je eine Rückführleitung 16 auf, die mit entsprechenden Anschlüssen einer zentralen Steuereinheit 17 verbunden sind. Diese steuert den Zu- und Rückfluss der Kühlluft durch diese Leitungen in Abhängigkeit vom jeweiligen Temperatursollwert der einzelnen Kühlfächer. Beim beschriebenen Ausführungsbeispiel ist ein Temperatursollwert von 4 bis 5°C für das Hauptkühlfach 2, von 3°C für das Sonderkühlfach 3 und von 0°C für das Sonderkühlfach 4 festgelegt.The cooling compartments 2, 3 and 4 each have a supply line 15 and a respective return line 16, which are connected to corresponding connections of a central control unit 17. This controls the inflow and return of the cooling air through these lines as a function of the respective temperature setpoint of the individual cooling compartments. In the described embodiment, a temperature setpoint of 4 to 5 ° C for the main refrigerator compartment 2, set by 3 ° C for the special refrigerator compartment 3 and 0 ° C for the special refrigerator compartment 4.

Gemäss Fig. 3 ist die Steuereinheit 17 durch ein Steuerventil 18 gebildet, das sich aus einem Ventilgehäuse 18a und einer als Steuerorgan 18b dienende Hohlwalze 19 zusammensetzt, wobei letztere im Ventilgehäuse 18a mittels eines Schrittmotors 20 als Antriebsorgan drehbar ist.According to Fig. 3 the control unit 17 is formed by a control valve 18 which is composed of a valve housing 18a and a hollow roller 19 serving as a control member 18b, the latter being rotatable in the valve housing 18a by means of a stepping motor 20 as a drive member.

Das Ventilgehäuse 18a ist direkt über der Verdampferkammer 9 angeordnet und weist einerseits Luftzuführanschlüsse 21 und einen Luftrückführanschluss 22 auf, an welche entsprechende Zu- und Rückführleitungen der Verdampferkammer 9 anschliessbar sind. Das Ventilgehäuse 18 hat andererseits separate Luftzuführanschlüsse 23, 24, 25 und einen gemeinsamen Luftrückführanschluss 26 für die Zu- und Rückführleitungen 15, 16 der einzelnen Kühlfächer.The valve housing 18a is arranged directly above the evaporator chamber 9 and has on the one hand air supply connections 21 and an air return connection 22 to which corresponding supply and return lines of the evaporation chamber 9 can be connected. On the other hand, the valve housing 18 has separate air supply ports 23, 24, 25 and a common air return port 26 for the supply and return lines 15, 16 of the individual cooling compartments.

Das Steuereinheit 17 zeichnet sich durch eine kompakte Bauweise aus, und kann leicht und schnell in die jeweils erforderliche Steuerstellung verstellt werden.The control unit 17 is characterized by a compact design, and can be easily and quickly adjusted to the required control position.

Gemäss Fig. 4 bis Fig. 7 befinden sich in der Hohlwalze 19 radiale Längsstege 27, welche derart ausgerichtet sind, dass die Hohlwalze 19 bei einer Drehung um jeweils einen bestimmten vorzugsweise gleichen Drehwinkel die verschiedenen Öffnungs- bzw. Schliessstellungen der einzelnen Luftzuführanschlüsse definiert.According to Fig. 4 to Fig. 7 are located in the hollow roller 19 radial longitudinal webs 27, which are aligned such that the hollow roller 19 defines the different opening or closing positions of the individual air supply ports at a rotation about a particular preferably same rotation angle.

In Fig. 4 bis Fig. 6 ist jeweils eine unterschiedliche Drehstellung der Hohlwalze 19 veranschaulicht, durch diese jeweils ein Luftzuführanschluss 23 oder 24 oder 25 geöffnet ist, indes die beiden andern geschlossen sind. Damit kann jedes der Kühlfächer 2, 3, 4 unabhängig von den andern mit Kühlluft versorgt werden. Die Strömungsrichtung der Kühlluft ist jeweils durch Pfeile angedeutet.In Fig. 4 to Fig. 6 In each case a different rotational position of the hollow roller 19 is illustrated, through which in each case an air supply port 23 or 24 or 25 is opened, while the other two are closed. Thus, each of the cooling compartments 2, 3, 4 can be supplied with cooling air independently of the others. The flow direction of the cooling air is indicated by arrows.

Zum Abtauen des Verdampfers 10 nimmt die Steuereinheit 17 die in Fig. 7 gezeigte Steuerstellung ein, in welcher sämtliche Zu- und Rückführanschlüsse 23 bis 26 der Kühlfächer 2, 3 und 4 geschlossen sind, während die Zu- und Rückführanschlüsse 21, 22 der Verdampferkammer 9 direkt miteinander über einen Defrost-Bypass 29 der Hohlwalze 19 verbunden sind. Ausserdem werden die Ein- und Austrittsöffnungen 12, 13 des Tiefkühlfaches 5 geschlossen, so dass auch in diesem keine Luftzirkulation stattfindet und die Luft nur im Innenraum der Verdampferkammer 9 durch den Verdampfer 10 zirkuliert. Dadurch ist ein schnelles Abtauen des Verdampfers gewährleistet, insbesondere wenn die Luft in der Verdampferkammer 9 beispielsweise mit einer Heizschlange 35 vorübergehend erwärmt wird.For defrosting the evaporator 10, the control unit 17 takes in Fig. 7 shown control position in which all supply and return ports 23 to 26 of the cooling compartments 2, 3 and 4 are closed, while the supply and return ports 21, 22 of the evaporator chamber 9 are connected directly to each other via a defrost bypass 29 of the hollow cylinder 19. In addition, the inlet and outlet openings 12, 13 of the freezer compartment 5 are closed, so that even in this no air circulation takes place and the air circulates only in the interior of the evaporator chamber 9 through the evaporator 10. This ensures rapid defrosting of the evaporator, especially if the air in the evaporator chamber 9, for example, with a heating coil 35 is temporarily heated.

Gemäss Fig. 8 und Fig. 9 ist die Steuereinheit 17 durch ein Steuerventil 28 verdeutlicht, welches für einen Kühlschrank mit nur einem Kühlfach 2 und einem Tiefkühlfach 5 geeignet ist. Dieses Steuerventil 28 weist ein Steuerorgan 28b auf, welches so ausgebildet ist, dass es sich aus zwei Steuerklappen 30, 31 für die Steuerung der Luftrückführung aus den Kühlfächern 2 und 5 sowie einer dazwischenliegenden und koaxial mit ihnen drehbaren Hohlzylinder 32 für die Steuerung der Luftzuführung zu den Kühlfächern 2 und 5 zusammensetzt. Die Steuerklappen 30, 31 und der Hohlzylinder 32 können mittels des Schrittmotors 20 in die durch die Drehwinkel definierten Steuerstellungen positioniert werden.According to FIGS. 8 and 9 the control unit 17 is illustrated by a control valve 28, which is suitable for a refrigerator with only one refrigerated compartment 2 and a freezer compartment 5. This control valve 28 has a control member 28b, which is designed so that it consists of two control flaps 30, 31 for controlling the air return from the cooling compartments 2 and 5 and an intermediate and coaxial with them rotatable hollow cylinder 32 for controlling the air supply to the cooling compartments 2 and 5 composed. The control flaps 30, 31 and the hollow cylinder 32 can be positioned by means of the stepping motor 20 in the control positions defined by the rotation angle.

In der Steuerstellung gemäss Fig. 8 ist die Steuerklappe 30 geschlossen, so dass auch die Ansaugleitung des Kühlfaches 2 geschlossen ist. Die Steuerklappe 31 ist dagegen geöffnet, so dass auch die Ansaugleitung des Tiefkühlfaches 5 geöffnet ist. Der Hohlzylinder 32 befindet sich seinerseits in einer ersten Drehstellung, in welcher sie die Ausblasleitung des Tiefkühlfaches 5 durch die Öffnung 33 offenhält.In the tax position according to Fig. 8 the control flap 30 is closed, so that the suction line of the refrigerating compartment 2 is closed. On the other hand, the control flap 31 is open, so that the suction line of the freezer compartment 5 is also open. The hollow cylinder 32 is in turn in a first rotational position in which it holds open the purging of the freezer compartment 5 through the opening 33.

In der Steuerstellung gemäss Fig. 9 ist die Steuerklappe 30 geöffnet, so dass auch die Ansaugleitung des Hauptkühlfachs 2 offen ist. Die Steuerklappe 31 ist dagegen geschlossen, so dass auch die Ansaugleitung des Tiefkühlfachs 5 geschlossen ist. Und die Hohlkugel 32 befindet sich ihrerseits in einer zweiten Drehstellung, in welcher sie die Ausblasleitung des Hauptkühlfachs 2 durch die Öffnung 34 offenhält.In the tax position according to Fig. 9 the control flap 30 is open, so that the suction line of the main refrigerator compartment 2 is open. On the other hand, the control flap 31 is closed, so that the suction line of the freezer compartment 5 is also closed. And the hollow ball 32 is in turn in a second rotational position in which it holds the discharge line of the main cooling compartment 2 through the opening 34.

Die erfindungsgemässe Steuereinheit 17 zeichnet sich dadurch aus, dass sie mit einfachen Mitteln die funktionsgerechte Steuerung der Kühlluftkreisläufe sicherstellt. Ausserdem ist sie platzsparend und gut zugänglich einbaubar, was insbesondere bei Montage-, Wartungs- und Reparaturarbeiten erhebliche Vorteile mit sich bringt. Das Steuerventil 18 kann ohne grossen Aufwand als Massenprodukt hergestellt werden.The inventive control unit 17 is characterized in that it ensures the functional control of the cooling air circuits with simple means. In addition, it is space-saving and easy to install, which brings considerable advantages in particular in assembly, maintenance and repair work. The control valve 18 can be made without much effort as a mass product.

Die Erfindung ist mit dem oben näher erläuterten Ausführungsbeispiel ausreichend dargetan. Sie liesse sich jedoch noch in anderen Varianten verdeutlichen. Im Prinzip könnte das Steuerventil 18 mehr oder weniger viele Zu- und Rückführanschlüsse als veranschaulicht aufweisen. Auch könnte mehr als ein Steuerorgan 18b mit je einem Antriebsorgan vorgesehen sein.The invention is sufficiently demonstrated with the embodiment explained in detail above. However, it could be clarified in other variants. In principle, the control valve 18 could have more or fewer supply and return ports than illustrated. Also, more than one control member 18b may be provided, each with a drive member.

Claims (10)

Kühlschrank mit mindestens zwei vorzugsweise übereinander angeordneten Kühlfächern (2, 3, 4), die mit über einen Verdampfer (10) umgewälzter Kühlluft kühlbar sind, wobei der Verdampfer in einer separaten Verdampferkammer (9) angeordnet ist und Steuermittel zum Verschliessen und Öffnen der Verbindungswege zwischen der Verdampferkammer und den einzelnen Kühlfächern vorhanden sind, dadurch gekennzeichnet, dass
die Steuermittel in einer zentralen Steuereinheit (17) vorzugsweise im Rückraum des Kühlschranks nahe der Verdampferkammer (9) integriert sind.Refrigerator with at least two preferably arranged one above the other cooling compartments (2, 3, 4), which are coolable with an evaporator (10) circulating cooling air, wherein the evaporator in a separate evaporator chamber (9) is arranged and control means for closing and opening the communication paths between the evaporator chamber and the individual cooling compartments are present, characterized in that
the control means are integrated in a central control unit (17) preferably in the rear space of the refrigerator near the evaporator chamber (9). Kühlschrank nach Anspruch 1, dadurch gekennzeichnet, dass die Steuereinheit (17) durch ein Steuerventil (18, 28) gebildet ist, dessen Ventilgehäuse (18a) mit Luftzu- und Luftrückführanschlüssen (21, 22 bzw. 23 bis 26) für die Verdampferkammer (9) und die einzelnen Kühlfächer (2, 3, 4 bzw. 2, 5) versehen ist.Refrigerator according to claim 1, characterized in that the control unit (17) by a control valve (18, 28) is formed, the valve housing (18a) with Luftzu- and Luftrückführanschlüssen (21, 22 and 23 to 26) for the evaporator chamber (9 ) and the individual cooling compartments (2, 3, 4 or 2, 5) is provided. Kühlschrank nach Anspruch 2, dadurch gekennzeichnet, dass dem Ventilgehäuse (18a) je ein für jedes Kühlfach separater Luftzuführanschluss (23, 24, 25) sowie ein allen Kühlfächern gemeinsamen Luftrückführanschluss (26) zugeordnet ist.Refrigerator according to claim 2, characterized in that the valve housing (18a) is associated with a separate air supply port (23, 24, 25) for each cooling compartment and an air return port (26) common to all cooling compartments. Kühlschrank nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die Steuereinheit (17) in eine Steuerstellung bringbar ist, in welcher die Luftzu- und Luftrückführanschlüsse (21, 22) der Verdampferkammer (9) direkt miteinander über einen Defrost-Bypass (29) verbindbar sind.Refrigerator according to claim 2 or 3, characterized in that the control unit (17) can be brought into a control position in which the Luftzu- and Luftrückführanschlüsse (21, 22) of the evaporator chamber (9) directly to each other via a defrost bypass (29) connectable are. Kühlschrank nach einem der vorangehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das untere Kühlfach (5) als Tiefkühlfach ausgebildet ist und die Steuereinheit (17) direkt über der an einer Rückwand (11) des Tiefkühlfaches angrenzenden Verdampferkammer (9) eingebaut ist.Refrigerator according to one of the preceding claims 1 to 4, characterized in that the lower cooling compartment (5) is designed as a freezer compartment and the control unit (17) directly above the on a rear wall (11) of the freezer compartment adjacent evaporator chamber (9) is installed. Steuereinheit für einen Kühlschrank nach einem der vorangehenden Ansprüche 1 bis 5, mit einem Steuerventil (18, 28), dadurch gekennzeichnet, dass
das Steuerventil (18, 28) ein Ventilgehäuse (18a) mit mindestens einem darin drehbaren Steuerorgan (18b, 28b) aufweist, das zwischen mehreren durch Drehwinkel definierten Steuerstellungen vorzugsweise mit einem Schrittmotor (20) als Antriebsorgan verstellbar ist.Control unit for a refrigerator according to one of the preceding claims 1 to 5, with a control valve (18, 28), characterized in that
the control valve (18, 28) has a valve housing (18a) with at least one control member (18b, 28b) rotatable therein, which is adjustable between a plurality of control positions defined by rotation angle, preferably with a stepping motor (20) as a drive member. Steuereinheit nach Anspruch 6, dadurch gekennzeichnet, dass das Steuerorgan (18b) durch eine Hohlwalze (19) gebildet ist, die mit durch radial verlaufende Längsstege (27) abgegrenzten Verbindungskanälen (28) versehen ist.Control unit according to claim 6, characterized in that the control member (18b) by a hollow roller (19) is formed, which is provided with by radially extending longitudinal webs (27) delimited connection channels (28). Steuereinheit nach Anspruch 7, dadurch gekennzeichnet, dass durch die verschiedenen Steuerstellungen der Hohlwalze (19) jeweils ein Luftzuführanschluss (23, 24 oder 25) geöffnet ist, indes die beiden andern geschlossen sind, womit jedes der Kühlfächer (2, 3, 4) unabhängig von den andern mit Kühlluft versorgt werden kann.Control unit according to claim 7, characterized in that by the various control positions of the hollow roller (19) each have an air supply port (23, 24 or 25) is opened, while the other two are closed, whereby each of the cooling compartments (2, 3, 4) independently can be supplied by the other with cooling air. Steuereinheit nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass zum Abtauen des Verdampfers (10) die Hohlwalze (19) in eine Steuerstellung gedreht ist, in welcher sämtliche Zu- und Rückführanschlüsse (23 bis 26) der Kühlfächer (2, 3, 4, 5) geschlossen sind, während die Zu- und Rückführanschlüsse (21, 22) der Verdampferkammer (9) direkt miteinander verbunden sind, so dass die Luft nur in der Verdampferkammer zirkuliert.Control unit according to claim 7 or 8, characterized in that for defrosting the evaporator (10), the hollow roller (19) is rotated in a control position, in which all supply and return ports (23 to 26) of the cooling compartments (2, 3, 4, 5) are closed, while the supply and return ports (21, 22) of the evaporator chamber (9) are directly connected to each other, so that the air circulates only in the evaporator chamber. Steuereinheit nach Anspruch 6, dadurch gekennzeichnet, dass das Steuerorgan (28b) sich aus zwei Steuerklappen (30, 31) für die Steuerung der Luftrückführung aus den Kühlfächern (2, 5) sowie aus einem dazwischenliegenden und koaxial mit ihnen drehbaren Hohlzylinder (32) für die Steuerung der Luftzuführung zu den Kühlfächern (2, 5) zusammensetzt.Control unit according to Claim 6, characterized in that the control member (28b) consists of two control flaps (30, 31) for controlling the air return from the cooling compartments (2, 5) and an intermediate hollow cylinder (32) rotatable coaxially therewith the control of the air supply to the cooling compartments (2, 5) composed.
EP11004227A 2011-05-23 2011-05-23 Refrigerator Withdrawn EP2527766A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103542663A (en) * 2013-11-01 2014-01-29 合肥美的电冰箱有限公司 Refrigeration device
EP3351878A4 (en) * 2015-10-29 2018-09-26 Qingdao Haier Joint Stock Co., Ltd Branching air supply device and refrigerator with same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0828121A2 (en) * 1996-08-08 1998-03-11 Mitsubishi Denki Kabushiki Kaisha Refrigerator/freezer
WO2001004555A1 (en) * 1999-07-13 2001-01-18 Multibrás S.A. Eletrodomésticos An air flow controlling device for refrigerators and freezers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0828121A2 (en) * 1996-08-08 1998-03-11 Mitsubishi Denki Kabushiki Kaisha Refrigerator/freezer
WO2001004555A1 (en) * 1999-07-13 2001-01-18 Multibrás S.A. Eletrodomésticos An air flow controlling device for refrigerators and freezers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103542663A (en) * 2013-11-01 2014-01-29 合肥美的电冰箱有限公司 Refrigeration device
EP3351878A4 (en) * 2015-10-29 2018-09-26 Qingdao Haier Joint Stock Co., Ltd Branching air supply device and refrigerator with same
US10544980B2 (en) 2015-10-29 2020-01-28 Qingdao Haier Joint Stock Col, Ltd Branching air supply device and refrigerator with same

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