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EP2171373A1 - Refrigerator and evaporator therefor - Google Patents

Refrigerator and evaporator therefor

Info

Publication number
EP2171373A1
EP2171373A1 EP08774909A EP08774909A EP2171373A1 EP 2171373 A1 EP2171373 A1 EP 2171373A1 EP 08774909 A EP08774909 A EP 08774909A EP 08774909 A EP08774909 A EP 08774909A EP 2171373 A1 EP2171373 A1 EP 2171373A1
Authority
EP
European Patent Office
Prior art keywords
evaporator
line
line sections
appliance according
refrigerating appliance
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
Application number
EP08774909A
Other languages
German (de)
French (fr)
Other versions
EP2171373B1 (en
Inventor
Wolfgang Nuiding
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Priority to PL08774909T priority Critical patent/PL2171373T3/en
Publication of EP2171373A1 publication Critical patent/EP2171373A1/en
Application granted granted Critical
Publication of EP2171373B1 publication Critical patent/EP2171373B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
    • F28F1/22—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/02—Details of evaporators
    • F25B2339/023—Evaporators consisting of one or several sheets on one face of which is fixed a refrigerant carrying coil
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/01—Geometry problems, e.g. for reducing size
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2210/00—Heat exchange conduits
    • F28F2210/02—Heat exchange conduits with particular branching, e.g. fractal conduit arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2210/00—Heat exchange conduits
    • F28F2210/10—Particular layout, e.g. for uniform temperature distribution

Definitions

  • the present invention relates to a refrigerator with at least one storage compartment and a refrigerant circuit comprising an evaporator for cooling the storage compartment, and an evaporator for such a refrigeration device.
  • Such evaporators conventionally include a circuit board on which a refrigerant line extends in loops from an injection point to an outlet point.
  • the loops are usually regularly arranged in successive installation orientation of the evaporator from top to bottom, so that when at the beginning of a cooling phase refrigerant is injected into the evaporator, the liquid refrigerant and with him the cooling effect only gradually from top to bottom over the entire evaporator surface spreads. Several minutes may pass before the entire evaporator surface has cooled evenly. This effect is all the greater, the larger the circuit board of the evaporator and / or its conduit length and the more intense the heat exchange at the surface of the evaporator.
  • Object of the present invention is to provide a refrigerator with improved energy efficiency and suitable for such a refrigerator evaporator.
  • the object is achieved on the one hand by the fact that in a refrigerator with at least one storage compartment and a refrigerant circuit comprising an evaporator on the
  • Evaporator at least two the one storage compartment cooling line sections are formed, which are connected in parallel in the refrigerant circuit and spaced from each other
  • both line sections are simultaneously supplied with liquid refrigerant upon activation of the refrigerant circuit; because they have spaced centers of gravity, theirs focuses
  • the spacing of the centroids should therefore be at least greater than the ratio of the surface area of the evaporator to the length of the refrigerant line extending thereon.
  • the separation of the line sections may be such that a boundary can be drawn on the evaporator between regions cooled by one and the other of the line sections, which is not longer than the sum of the edge lengths of the evaporator.
  • the cooling effect initially is expedient for the cooling effect initially to be used in regions of the evaporator which are at a distance from one another and from there to spread over the evaporator surface.
  • the line sections are expediently arranged so that on at least one of the line sections, the line length between an upstream starting point of the power section and the farthest from a center of the evaporator point of this line section is shorter than the line length between the farthest from the center of the evaporator point and a downstream end point of the same line section.
  • a branch forming an upstream starting point of the pipe sections is preferably arranged on a circuit board of the evaporator itself. So only a single supply line to the evaporator board must be connected to supply all line sections with refrigerant. In a corresponding manner, it is expedient for the discharge of the refrigerant that a confluence, which forms a downstream end point of the line sections, is likewise formed on the evaporator plate.
  • the object is further achieved by an evaporator for a refrigeration device in which line sections connected in parallel to a common injection point are arranged on an evaporator plate.
  • Fig. 1 is a schematic representation of an evaporator according to the invention for a
  • Refrigerating appliance with a single storage compartment
  • Fig. 2 shows a second embodiment of the evaporator according to the invention.
  • Fig. 1 is a schematic plan view of an evaporator for a refrigerator with a single storage compartment, such as a refrigerator or freezer.
  • the evaporator can be joined together in a manner known per se to a person skilled in the art from a planar board on which a pipeline is attached as refrigerant channel 1, or a planar board and a board into which a refrigerant channel 1 is embossed.
  • the second alternative is preferred because it facilitates the production of a branched refrigerant channel, as described in more detail below.
  • At a junction in the upper left corner of the board leads leading to a compressor of the refrigerator suction line 11 to the refrigerant passage 1.
  • a guided in the suction line capillary 2 is inserted at an injection point 12 tightly into a bottleneck of the refrigerant passage 1.
  • the evaporator can, for example, in a rear wall of the Refrigerating device, between an inner container and an insulating foam layer, be mounted with the inner container facing planar board.
  • the invention is also applicable to an evaporator which is arranged in the inner container of a refrigerator and surrounds a freezing compartment there.
  • a branch 3 is formed in the refrigerant channel 1, at which the refrigerant flow is divided into two line sections 4, 5.
  • the line section 4 substantially fills the upper half of the evaporator plate and extends in several U-shaped loops to a confluence 6, where it again meets the line section 5.
  • the line section 5 extends from the branch 3, initially along the edges of the evaporator plate to a lower edge, from where it also forms a loop on the confluence 6.
  • the line length between the branch 3 and a point 7 and 8 of the line section furthest from a center C of the board is substantially shorter than the distance from point 7 or 8 to the confluence 6.
  • the distance between the centers of gravity 9, 10 of the line sections 4, 5 is many times greater than the distance d between adjacent parallel pieces of the line sections 4, 5 and thus significantly larger than the ratio of board surface to the total length of the refrigerant channels extending thereon. 1
  • Fig. 2 shows a second embodiment of the evaporator. While in the embodiment of Fig. 1, a clear distinction between a substantially cooled by the line section 4 upper half and a cooled only from the line section 5 lower half of the board is possible, such a clear separation in the embodiment of FIG. 2 is not given. Although here, too, the upper half of the evaporator plate is essentially cooled only by the line section 4, while the line section 5 along the top and right edges of the board on the shortest path of the lower half of the board strives, but extend in this lower half of the line sections 4, 5 largely next to each other.
  • the line sections 4, 5 are substantially equal in length
  • the line section 5 is significantly shorter than the section 4.
  • the line cross-section in the section 5 is smaller than in section 4. It can be chosen taking into account the lengths of the sections 4, 5 so that both sections 4, 5 have a same flow resistance.
  • the loops of the line section 5 extend to less than half of the board surface and also the lower board half is cooled in the stationary operating state via the line section 4, the flow resistance of the line section 5 but also higher than that of the line section 4th to get voted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

In a refrigerator having at least one storage compartment and a refrigerant circuit comprising an evaporator, a refrigerant channel (1) of the evaporator is divided into at least two channelling portions (4, 5) which cool the one storage compartment, are connected in parallel in the refrigerant circuit and have spaced-apart centres of gravity (9, 10).

Description

Kältegerät und Verdampfer dafür Refrigerating appliance and evaporator for it

Die vorliegende Erfindung betrifft ein Kältegerät mit wenigstens einem Lagerfach und einem Kältemittelkreis, der einen Verdampfer zum Kühlen des Lagerfachs umfasst, sowie einen Verdampfer für ein solches Kältegerät.The present invention relates to a refrigerator with at least one storage compartment and a refrigerant circuit comprising an evaporator for cooling the storage compartment, and an evaporator for such a refrigeration device.

Derartige Verdampfer umfassen herkömmlicherweise eine Platine, auf der eine Kältemittelleitung sich in Schleifen von einer Einspritzstelle zu einer Auslassstelle erstreckt. Die Schleifen sind zumeist regelmäßig, in Einbauorientierung des Verdampfers von oben nach unten aufeinanderfolgend, angeordnet, so dass, wenn zu Beginn einer Kühlphase Kältemittel in den Verdampfer eingespritzt wird, sich das flüssige Kältemittel und mit ihm die Kühlwirkung erst allmählich von oben nach unten über die gesamte Verdampferfläche ausbreitet. Bis die gesamte Verdampferfläche gleichmäßig abgekühlt ist, können mehrere Minuten vergehen. Dieser Effekt ist umso stärker, je größer die Platine des Verdampfers und/oder seine Leitungslänge ist und je intensiver der Wärmeaustausch an der Oberfläche des Verdampfers ist. Die Folge davon ist, dass zu Beginn jeder Betriebsphase des Kältemittelkreises nur auf einem Teil der Verdampferoberfläche ein effizienter Wärmeaustausch stattfindet. Dies verlängert die Laufzeit des Kältemittelkreises, die erforderlich ist, um eine gegebene Wärmemenge aus dem Lagerfach abzuführen und beeinträchtigt somit die Energieeffizienz des Kältegeräts.Such evaporators conventionally include a circuit board on which a refrigerant line extends in loops from an injection point to an outlet point. The loops are usually regularly arranged in successive installation orientation of the evaporator from top to bottom, so that when at the beginning of a cooling phase refrigerant is injected into the evaporator, the liquid refrigerant and with him the cooling effect only gradually from top to bottom over the entire evaporator surface spreads. Several minutes may pass before the entire evaporator surface has cooled evenly. This effect is all the greater, the larger the circuit board of the evaporator and / or its conduit length and the more intense the heat exchange at the surface of the evaporator. The consequence of this is that at the beginning of each operating phase of the refrigerant circuit an efficient heat exchange takes place only on a part of the evaporator surface. This prolongs the running time of the refrigerant circuit, which is required to dissipate a given amount of heat from the storage compartment and thus affects the energy efficiency of the refrigerator.

Aufgabe der vorliegenden Erfindung ist, ein Kältegerät mit verbesserter Energieeffizienz und einen für ein solches Kältegerät geeigneten Verdampfer zu schaffen.Object of the present invention is to provide a refrigerator with improved energy efficiency and suitable for such a refrigerator evaporator.

Die Aufgabe wird zum einen dadurch gelöst, dass bei einem Kältegerät mit wenigstens einem Lagerfach und einem Kältemittelkreis, der einen Verdampfer umfasst, auf demThe object is achieved on the one hand by the fact that in a refrigerator with at least one storage compartment and a refrigerant circuit comprising an evaporator on the

Verdampfer wenigstens zwei das eine Lagerfach kühlende Leitungsabschnitte gebildet sind, die in dem Kältemittelkreis parallel verbunden sind und voneinander beabstandeteEvaporator at least two the one storage compartment cooling line sections are formed, which are connected in parallel in the refrigerant circuit and spaced from each other

Schwerpunkte aufweisen. Durch die Parallelschaltung werden beide Leitungsabschnitte bei Aktivierung des Kältemittelkreises gleichzeitig mit flüssigem Kältemittel versorgt; da sie voneinander beabstandete Schwerpunkte aufweisen, konzentriert sich ihreHave focal points. Due to the parallel connection, both line sections are simultaneously supplied with liquid refrigerant upon activation of the refrigerant circuit; because they have spaced centers of gravity, theirs focuses

Kühlwirkung auf jeweils verschiedene Bereiche des Verdampfers. So wird eine vonCooling effect on different areas of the evaporator. So one of

Beginn des Kühlbetriebs an gleichmäßigere Kälteverteilung auf dem Verdampfer erzielt, so dass sich die Zeitspanne zwischen dem Beginn des Kühlbetriebs und einer gleichmäßigen Abkühlung des gesamten Verdampfers verkürzt.Starting the cooling operation to achieve a more even distribution of cold on the evaporator, so that the time between the start of the cooling operation and a uniform cooling of the entire evaporator is shortened.

Dieser Effekt ist umso signifikanter, je weiter die Schwerpunkte der Leitungsabschnitte auseinander liegen; der Abstand der Schwerpunkte sollte daher wenigstens größer als das Verhältnis von Oberfläche des Verdampfers zur Länge der sich darauf erstreckenden Kältemittelleitung sein. Im Extremfall kann die Trennung der Leitungsabschnitte derart sein, dass auf dem Verdampfer eine Grenze zwischen von dem einen und dem anderen der Leitungsabschnitte gekühlten Bereichen gezogen werden kann, die nicht länger ist als die Summe der Kantenlängen des Verdampfers.This effect is all the more significant the farther the centers of gravity of the line sections are; the spacing of the centroids should therefore be at least greater than the ratio of the surface area of the evaporator to the length of the refrigerant line extending thereon. In an extreme case, the separation of the line sections may be such that a boundary can be drawn on the evaporator between regions cooled by one and the other of the line sections, which is not longer than the sum of the edge lengths of the evaporator.

Des Weiteren ist es zweckmäßig, wenn die Kühlwirkung zunächst in voneinander beabstandeten Regionen des Verdampfers einsetzt und sich von dort aus über die Verdampferoberfläche ausbreitet. Hierfür sind zweckmäßigerweise die Leitungsabschnitte so angeordnet, dass an wenigstens einem der Leitungsabschnitte die Leitungslänge zwischen einem stromaufwärtigen Anfangspunkt des Leistungsabschnitts und dem am weitesten von einem Mittelpunkt des Verdampfers entfernten Punkt dieses Leitungsabschnitts kürzer ist als die Leitungslänge zwischen dem am weitesten vom Mittelpunkt des Verdampfers entfernten Punkt und einem stromabwärtigen Endpunkt desselben Leitungsabschnitts.Furthermore, it is expedient for the cooling effect initially to be used in regions of the evaporator which are at a distance from one another and from there to spread over the evaporator surface. For this purpose, the line sections are expediently arranged so that on at least one of the line sections, the line length between an upstream starting point of the power section and the farthest from a center of the evaporator point of this line section is shorter than the line length between the farthest from the center of the evaporator point and a downstream end point of the same line section.

Um eine gleichmäßige Verteilung der Kühlleistung auf die Leitungsabschnitte zu gewährleisten, ist es zweckmäßig, wenn eine gemeinsame Drosselstelle den Leitungsabschnitten vorgeschaltet ist. So kann sich ein eventuell fertigungsbedingt streuender Strömungswiderstand der Drosselstelle nicht auf die Verteilung des Kältemittels auf die Leitungsabschnitte auswirken.In order to ensure a uniform distribution of the cooling capacity on the line sections, it is expedient if a common throttle point is connected upstream of the line sections. Thus, a production-possibly scattering flow resistance of the throttle point can not affect the distribution of the refrigerant to the line sections.

Eine Verzweigung, die einen stromaufwärtigen Anfangspunkt der Leitungsabschnitte bildet, ist vorzugsweise auf einer Platine des Verdampfers selbst angeordnet. So muss nur eine einzige Zuleitung an die Verdampferplatine angeschlossen werden, um sämtliche Leitungsabschnitte mit Kältemittel zu versorgen. In entsprechender Weise ist es für die Ableitung des Kältemittels zweckmäßig, dass ein Zusammenfluss, der einen stromabwärtigen Endpunkt der Leitungsabschnitte bildet, ebenfalls auf der Verdampferplatine gebildet ist.A branch forming an upstream starting point of the pipe sections is preferably arranged on a circuit board of the evaporator itself. So only a single supply line to the evaporator board must be connected to supply all line sections with refrigerant. In a corresponding manner, it is expedient for the discharge of the refrigerant that a confluence, which forms a downstream end point of the line sections, is likewise formed on the evaporator plate.

Um die verfügbare Kühlleistung gleichmäßig auf die Leitungsabschnitte zu verteilen, ist es bevorzugt, dass diese den gleichen Strömungswiderstand aufweisen. Es ist nicht erforderlich, dass alle Leitungsabschnitte die gleiche Länge oder den gleichen Querschnitt aufweisen, doch sollte zur Angleichung des Strömungswiderstandes ein kürzerer Leitungsabschnitt einen kleineren Leitungsquerschnitt haben als ein längerer.In order to evenly distribute the available cooling capacity to the pipe sections, it is preferred that they have the same flow resistance. It is not necessary that all the pipe sections have the same length or the same cross-section, but to equalize the flow resistance, a shorter pipe section should have a smaller pipe section than a longer one.

Die Aufgabe wird ferner gelöst durch einen Verdampfer für ein Kältegerät, bei dem auf einer Verdampferplatine parallel mit einer gemeinsamen Einspritzstelle verbundene Leitungsabschnitte angeordnet sind.The object is further achieved by an evaporator for a refrigeration device in which line sections connected in parallel to a common injection point are arranged on an evaporator plate.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen unter Bezugnahme auf die beigefügten Figuren. Es zeigen:Further features and advantages of the invention will become apparent from the following description of embodiments with reference to the accompanying figures. Show it:

Fig. 1 eine schematische Darstellung eines erfindungsgemäßen Verdampfers für einFig. 1 is a schematic representation of an evaporator according to the invention for a

Kältegerät mit einem einzigen Lagerfach; undRefrigerating appliance with a single storage compartment; and

Fig. 2 eine zweite Ausgestaltung des erfindungsgemäßen Verdampfers.Fig. 2 shows a second embodiment of the evaporator according to the invention.

Fig. 1 ist eine schematische Draufsicht auf einen Verdampfer für ein Kältegerät mit einem einzigen Lagerfach, wie etwa einem Kühlschrank oder Gefrierschrank. Der Verdampfer kann in dem Fachmann an sich bekannter Weise aus einer ebenen Platine, auf der als Kältemittelkanal 1 eine Rohrleitung befestigt ist, oder einer ebenen Platine und einer Platine, in die ein Kältemittelkanal 1 eingeprägt ist, zusammengefügt sein. Im vorliegenden Fall ist die zweite Alternative bevorzugt, da sie die Fertigung eines verzeigten Kältemittelkanals, wie im Folgenden genauer beschrieben, erleichtert. An einer Anschlussstelle in der linken oberen Ecke der Platine mündet eine zu einem Verdichter des Kältegeräts führende Saugleitung 11 auf den Kältemittelkanal 1. Eine inmitten der Saugleitung geführte Kapillare 2 ist an einer Einspritzstelle 12 dicht in eine Engstelle des Kältemittelkanals 1 eingefügt. Der Verdampfer kann zum Beispiel in einer Rückwand des Kältegeräts, zwischen einem Innenbehälter und einer isolierenden Schaumschicht, mit dem Innenbehälter zugewandter ebener Platine montiert sein. Die Erfindung ist aber auch anwendbar auf einen Verdampfer, der im Innenbehälter eines Kühlschranks angeordnet ist und dort ein Frostfach umgibt.Fig. 1 is a schematic plan view of an evaporator for a refrigerator with a single storage compartment, such as a refrigerator or freezer. The evaporator can be joined together in a manner known per se to a person skilled in the art from a planar board on which a pipeline is attached as refrigerant channel 1, or a planar board and a board into which a refrigerant channel 1 is embossed. In the present case, the second alternative is preferred because it facilitates the production of a branched refrigerant channel, as described in more detail below. At a junction in the upper left corner of the board leads leading to a compressor of the refrigerator suction line 11 to the refrigerant passage 1. A guided in the suction line capillary 2 is inserted at an injection point 12 tightly into a bottleneck of the refrigerant passage 1. The evaporator can, for example, in a rear wall of the Refrigerating device, between an inner container and an insulating foam layer, be mounted with the inner container facing planar board. However, the invention is also applicable to an evaporator which is arranged in the inner container of a refrigerator and surrounds a freezing compartment there.

Stromabwärts von der Einspritzstelle 12 ist im Kältemittelkanal 1 eine Verzweigung 3 gebildet, an der sich der Kältemittelstrom auf zwei Leitungsabschnitte 4, 5 aufteilt. Der Leitungsabschnitt 4 füllt im wesentlichen die oberen Hälfte der Verdampferplatine aus und erstreckt sich in mehreren U-förmigen Schleifen zu einem Zusammenfluss 6, an dem er wieder auf den Leitungsabschnitt 5 trifft. Der Leitungsabschnitt 5 erstreckt sich von der Verzweigung 3 aus zunächst entlang der Ränder der Verdampferplatine bis zu einem unteren Rand, von wo aus er Schleifen bildend ebenfalls auf den Zusammenfluss 6 zuläuft. Bei beiden Leitungsabschnitten 4, 5 ist die Leitungslänge zwischen der Verzweigung 3 und einem am weitesten von einem Mittelpunkt C der Platine entfernten Punkt 7 beziehungsweise 8 des Leitungsabschnitts wesentlich kürzer als die Entfernung vom Punkt 7 beziehungsweise 8 zum Zusammenfluss 6. Somit setzt, wenn der Verdampfer mit Kältemittel beaufschlagt wird, die Kühlwirkung an zwei weit voneinander entfernten Orten der Platine schnell ein und breitet sich aus zwei Richtungen zur Mitte der Platine hin aus. So wird die gesamte Platine zügig heruntergekühlt.Downstream of the injection point 12, a branch 3 is formed in the refrigerant channel 1, at which the refrigerant flow is divided into two line sections 4, 5. The line section 4 substantially fills the upper half of the evaporator plate and extends in several U-shaped loops to a confluence 6, where it again meets the line section 5. The line section 5 extends from the branch 3, initially along the edges of the evaporator plate to a lower edge, from where it also forms a loop on the confluence 6. In both line sections 4, 5, the line length between the branch 3 and a point 7 and 8 of the line section furthest from a center C of the board is substantially shorter than the distance from point 7 or 8 to the confluence 6. Thus, when the evaporator Refrigerant is applied, the cooling effect at two widely spaced locations of the board quickly and spreads from two directions to the center of the board out. So the entire board is cooled down quickly.

Die Entfernung zwischen den Schwerpunkten 9, 10 der Leitungsabschnitte 4, 5 ist um ein Vielfaches größer als der Abstand d zwischen benachbarten parallelen Stücken der Leitungsabschnitte 4, 5 und damit auch deutlich größer als das Verhältnis von Platinenfläche zur Gesamtlänge der darauf verlaufenden Kältemittelkanäle 1.The distance between the centers of gravity 9, 10 of the line sections 4, 5 is many times greater than the distance d between adjacent parallel pieces of the line sections 4, 5 and thus significantly larger than the ratio of board surface to the total length of the refrigerant channels extending thereon. 1

Fig. 2 zeigt eine zweite Ausgestaltung des Verdampfers. Während bei der Ausgestaltung der Fig. 1 eine klare Unterscheidung zwischen einer im wesentlichen vom Leitungsabschnitt 4 gekühlten oberen Hälfte und einer ausschließlich vom Leitungsabschnitt 5 gekühlten unteren Hälfte der Platine möglich ist, ist eine solche klare Trennung bei der Ausgestaltung der Fig. 2 nicht gegeben. Zwar ist auch hier die obere Hälfte der Verdampferplatine im wesentlichen nur durch den Leitungsabschnitt 4 gekühlt, während der Leitungsabschnitt 5 entlang des oberen und rechten Randes der Platine auf kürzestem Wege der unteren Platinenhälfte zustrebt, doch verlaufen in dieser unteren Hälfte die Leitungsabschnitte 4, 5 weitgehend neben einander her. Die Wirkung ist aber dennoch ähnlich derjenigen der Ausgestaltung von Fig. 1. Da der Leitungsabschnitt 5 die untere Hälfte der Platine ohne Umwege erreicht, beginnt er jeweils mit geringer Verzögerung nach dem Einsetzen eines Kältemittelstroms durch den Verdampfer, dessen untere Hälfte zu kühlen, lange bevor flüssiges Kältemittel über den Leitungsabschnitt 4 die untere Platinenhälfte erreicht. Somit breitet sich auch hier die Kühlwirkung zunächst vom oberen Rand der Platine und kurz darauf auch von unten her in kurzer Zeit über die gesamte Platinenfläche aus.Fig. 2 shows a second embodiment of the evaporator. While in the embodiment of Fig. 1, a clear distinction between a substantially cooled by the line section 4 upper half and a cooled only from the line section 5 lower half of the board is possible, such a clear separation in the embodiment of FIG. 2 is not given. Although here, too, the upper half of the evaporator plate is essentially cooled only by the line section 4, while the line section 5 along the top and right edges of the board on the shortest path of the lower half of the board strives, but extend in this lower half of the line sections 4, 5 largely next to each other. The effect is however Nevertheless, since the line section 5 reaches the lower half of the board without detours, it starts each with a slight delay after the onset of a refrigerant flow through the evaporator, the lower half to cool long before liquid refrigerant on the Line section 4 reaches the lower half of the circuit board. Thus, the cooling effect spreads first from the top of the board and shortly thereafter from below in a short time over the entire board surface.

Da die Leitungsabschnitte 4, 5 nicht auf ihrer gesamten Länge nebeneinander herlaufen, sind auch hier die Schwerpunkte 9, 10 der Leitungsabschnitte 4, 5 deutlich voneinander beabstandet.Since the line sections 4, 5 do not run along each other over their entire length, here too the center of gravity 9, 10 of the line sections 4, 5 are clearly spaced from each other.

Während im Falle der Fig. 1 die Leitungsabschnitte 4, 5 im Wesentlichen gleich lang sind, ist bei der Ausgestaltung der Fig. 2 der Leitungsabschnitt 5 deutlich kürzer als der Abschnitt 4. Um eine gleichmäßige Verteilung des Kältemittels und damit auch der Kühlleistung auf die zwei Leitungsabschnitte 4, 5 zu gewährleisten, ist der Leitungsquerschnitt im Abschnitt 5 kleiner als im Abschnitt 4. Er kann unter Berücksichtigung der Längen der Abschnitte 4, 5 so gewählt sein, dass beide Abschnitte 4, 5 einen gleichen Strömungswiderstand aufweisen. In Anbetracht der Tatsache, dass die Schleifen des Leitungsabschnitts 5 sich auf weniger als der Hälfte der Platinenoberfläche erstrecken und außerdem die untere Platinenhälfte im stationären Betriebszustand auch über den Leitungsabschnitt 4 gekühlt wird, kann der Strömungswiderstand des Leitungsabschnitts 5 aber auch höher als der des Leitungsabschnitts 4 gewählt werden. While in the case of Fig. 1, the line sections 4, 5 are substantially equal in length, in the embodiment of Fig. 2, the line section 5 is significantly shorter than the section 4. To a uniform distribution of the refrigerant and thus the cooling capacity on the two To ensure line sections 4, 5, the line cross-section in the section 5 is smaller than in section 4. It can be chosen taking into account the lengths of the sections 4, 5 so that both sections 4, 5 have a same flow resistance. In view of the fact that the loops of the line section 5 extend to less than half of the board surface and also the lower board half is cooled in the stationary operating state via the line section 4, the flow resistance of the line section 5 but also higher than that of the line section 4th to get voted.

Claims

Patentansprüche claims 1. Kältegerät mit wenigstens einem von einem platinenartigen Verdampfer gekühltem Lagerfach und einem Kältemittelkreis, der den platinartigen Verdampfer umfasst, dadurch gekennzeichnet, dass ein Kältemittelkanal (1 ) des Verdampfers in wenigstens zwei das eine Lagerfach kühlende Leitungsabschnitte (4, 5) gegliedert ist, die in dem Kältemittelkreis parallel angeordnet sind und voneinander beabstandete Schwerpunkte (9, 10) aufweisen.1. Refrigeration device with at least one cooled by a platinum-type evaporator storage compartment and a refrigerant circuit comprising the platinum-type evaporator, characterized in that a refrigerant passage (1) of the evaporator in at least two a storage compartment cooling line sections (4, 5) is structured, the in the refrigerant circuit are arranged in parallel and spaced apart centers of gravity (9, 10). 2. Kältegerät nach Anspruch 1 , dadurch gekennzeichnet, dass der Abstand der Schwerpunkte (9, 10) voneinander größer ist als das Verhältnis von Oberfläche des2. Refrigerating appliance according to claim 1, characterized in that the distance of the centers of gravity (9, 10) from each other is greater than the ratio of the surface of the Verdampfers zur Länge des sich darauf erstreckenden Kältemittelkanals (1 ).Evaporator to the length of the extending thereon refrigerant channel (1). 3. Kältegerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass an wenigstens einem der Leitungsabschnitte (4, 5) die Leitungslänge zwischen einem stromaufwärtigen Anfangspunkt (3) des Leitungsabschnitts (4, 5) und dem am weitesten von einem Mittelpunkt (C) des platinenartigen Verdampfers entfernten Punkt (7, 8) des Leitungsabschnitts (4, 5) kürzer ist als die Leitungslänge zwischen dem am weitesten vom Mittelpunkt des Verdampfers entfernten Punkt (7, 8) und einem stromabwärtigen Endpunkt (6) des Leitungsabschnitts (4, 5).3. Refrigerating appliance according to claim 1 or 2, characterized in that on at least one of the line sections (4, 5), the line length between an upstream starting point (3) of the line section (4, 5) and the farthest from a midpoint (C) of the Platinum-like evaporator point (7, 8) of the line section (4, 5) is shorter than the line length between the farthest from the center of the evaporator point (7, 8) and a downstream end point (6) of the line section (4, 5) , 4. Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass den Leitungsabschnitten (4, 5) eine gemeinsame Drosselstelle (2) vorgeschaltet ist.4. Refrigerating appliance according to one of the preceding claims, characterized in that the line sections (4, 5) is connected upstream of a common throttle point (2). 5. Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der platinenartige Verdampfer eine Verzweigung (3) aufweist, die einen stromaufwärtigen Anfangspunkt der Leitungsabschnitte (4, 5) bildet.5. Refrigerating appliance according to one of the preceding claims, characterized in that the platinum-type evaporator has a branch (3) which forms an upstream starting point of the line sections (4, 5). 6. Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der platinenartige Verdampfer einen Zusammenfluss (6) aufweist, der einen stromabwärtigen Endpunkt der Leitungsabschnitte (4, 5) bildet. 6. Refrigerating appliance according to one of the preceding claims, characterized in that the platinum-type evaporator has a confluence (6), which forms a downstream end point of the line sections (4, 5). 7. Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Leitungsabschnitte (4, 5) den gleichen Strömungswiderstand aufweisen.7. Refrigerating appliance according to one of the preceding claims, characterized in that the line sections (4, 5) have the same flow resistance. 8. Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein kürzerer der Leitungsabschnitte (5) einen kleineren Leitungsquerschnitt aufweist als ein längerer (4).8. Refrigerating appliance according to one of the preceding claims, characterized in that a shorter of the line sections (5) has a smaller line cross-section than a longer one (4). 9. Kältegerät nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der platinenartige Verdampfer stehend im Kältegerät angeordnet ist.9. Refrigerating appliance according to one of claims 1 to 8, characterized in that the platinum-type evaporator is arranged vertically in the refrigeration device. 10. Verdampfer für ein Kältegerät, insbesondere nach einem der vorhergehenden10. evaporator for a refrigeration device, in particular according to one of the preceding Ansprüche, dadurch gekennzeichnet, dass auf einer Verdampferplatine parallel mit einer gemeinsamen Einspritzstelle (12) verbundene Leitungsabschnitte (4, 5) angeordnet sind. Claims, characterized in that arranged on an evaporator plate parallel to a common injection point (12) line sections (4, 5) are arranged.
EP08774909.9A 2007-07-24 2008-07-09 Refrigerator Active EP2171373B1 (en)

Priority Applications (1)

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PL08774909T PL2171373T3 (en) 2007-07-24 2008-07-09 Refrigerator

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DE102007034294A DE102007034294A1 (en) 2007-07-24 2007-07-24 Refrigerating appliance and evaporator for it
PCT/EP2008/058903 WO2009013130A1 (en) 2007-07-24 2008-07-09 Refrigerator and evaporator therefor

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RU2477427C2 (en) 2013-03-10
PL2171373T3 (en) 2016-02-29
CN101755176A (en) 2010-06-23
WO2009013130A1 (en) 2009-01-29
EP2171373B1 (en) 2015-09-09
CN101755176B (en) 2012-04-11
RU2010104627A (en) 2011-08-27
DE102007034294A1 (en) 2009-01-29

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