EP0732554B1 - Evaporator, in particular for compressor-operated domestic refrigerators - Google Patents

Evaporator, in particular for compressor-operated domestic refrigerators Download PDF

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Publication number
EP0732554B1
EP0732554B1 EP96101434A EP96101434A EP0732554B1 EP 0732554 B1 EP0732554 B1 EP 0732554B1 EP 96101434 A EP96101434 A EP 96101434A EP 96101434 A EP96101434 A EP 96101434A EP 0732554 B1 EP0732554 B1 EP 0732554B1
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EP
European Patent Office
Prior art keywords
evaporator
sections
section
refrigerant
cooling performance
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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.)
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EP96101434A
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German (de)
French (fr)
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EP0732554A2 (en
EP0732554A3 (en
Inventor
Detlef Cieslik
Alexander Dipl.-Ing. Rupp (Fh)
Friedrich Dipl.-Ing. Arnold
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Publication of EP0732554A3 publication Critical patent/EP0732554A3/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00Evaporators; Condensers
    • F25B39/02Evaporators
    • F25B39/022Evaporators with plate-like or laminated elements
    • F25B39/024Evaporators with plate-like or laminated elements with elements constructed in the shape of a hollow panel

Definitions

  • the invention relates to an evaporator, in particular for compressor-operated household appliances, with at least two evaporator sections serving as heat exchange surfaces different cooling capacity, which is the refrigerant delivered by a compressor is fed via injection points and which to a coherent sheet metal board are connected.
  • an evaporator board is shown and described in DE-OS 38 04 863, which for use in a cooling device with three thermally separated cooling compartments Suitable, each through an evaporator section of the board-like evaporator is cooled.
  • Each of the evaporator sections is one for reducing the pressure of one Compressor-assisted refrigerant serving injection tube, which in a Tongue of the evaporator board are arranged.
  • the feed channels connected to the injection pipes for the refrigerant to the refrigerant channel arrangements of the individual evaporator sections are along a board area common to all three evaporator sections to the respective channel arrangement of the evaporator section led to overlap of the refrigerant supply channel sections is coming. Conditional on this The refrigerant supply channels are badly hit despite the injection point provided for each evaporator section an undesirable and not insignificant temperature influence that cooled by the respective evaporator section Freezer instead.
  • the object of the invention is based on this state of the Technology to propose measures on the basis of which a temperature influence of the other evaporator section is avoided.
  • each evaporator section Injection point Due to the decentralized, separately assigned to each evaporator section Injection point is a targeted application of the evaporator section to be supplied with refrigerant, without passing over one of the evaporator sections refrigerant supply channels leading away to the other evaporator section the temperature of this evaporator section unwanted influence.
  • By controlling the individual evaporator sections is therefore an exact one controllable cooling of each by such an evaporator section cooled refrigerator compartment possible.
  • the invention provides that three evaporator sections are provided, one of which has a higher cooling capacity than the other two and each of the others Evaporator sections switched up in series is.
  • the evaporator section is formed by such an evaporator arrangement higher cooling capacity when the Evaporator section of lower cooling capacity always additional charged with liquid refrigerant and thus also cooled, so that the refrigeration demand cycles for the evaporator are higher Cooling capacity can be increased accordingly.
  • each of the evaporator sections lower cooling capacity its injection point on the heat exchange surface in the vicinity of its from the evaporator section higher cooling capacity facing away from the evaporator section having.
  • a particularly inexpensive and practical refrigeration connection of the two evaporator sections results if according to a further advantageous embodiment of the object the invention provides that the evaporator section higher cooling capacity with the other evaporator sections via a refrigerant channel Connection bridge are connected by refrigeration.
  • a refrigerant supply is particularly simple connectable if according to a further preferred embodiment the subject matter of the invention provides that the evaporator sections of lower cooling capacity their injection point essentially in the middle of that of the Evaporator section of higher cooling capacity facing away from the evaporator section exhibit.
  • the invention provides that the two evaporator sections lower cooling capacity to each other one provided between their adjacent section sides Retaining bridge are fixed.
  • the only figure shows a board-like evaporator in stretched representation with three within the board area arranged evaporator sections.
  • a board-like evaporator 10 for use in a non illustrated multi-temperature household refrigeration device is off two aluminum sheet metal plates joined together by pressure welding formed between which the refrigerant channel arrangement of the evaporator 10 is introduced.
  • the evaporator 10 has three different areas large evaporator sections, of which the one with evaporator section equipped with the largest area share 11 is designed as a freezer compartment evaporator. This points a floor area 12, a rear wall area 13 and one Ceiling area 14, which serve as heat exchange surfaces and which for this purpose is filled with refrigerant Refrigerant channel 15 are provided.
  • the flow of the refrigerant channel 15 serving refrigerant doing so in the ceiling area 14 by stamping one Throttle tube trained injection point 16 the refrigerant channel 15 of the evaporator section 11 is supplied.
  • the evaporator section 11 is an evaporator section 17 upstream, which for cooling a Serves zero degree compartment and which via a connecting bridge 18 is mechanically connected to the former.
  • a connecting bridge 18 For mechanical Connection serves only about a third of the length of the Connecting web 18, while the remaining length is saved from the evaporator section 11, so that the evaporator section 11, which due to its [-shaped Installation shape with its vertical on the floor area 12 to the level of the evaporator section 17 is largely arranged is thermally decoupled from this.
  • the evaporator section 11 is not as here Embodiment subjected to a [-shaped shape is, but is designed as a flat circuit board, serves for thermal decoupling between the adjacent side edges the evaporator sections 11 and 17 a recess 19, which extends essentially over the entire width of the mutually adjacent evaporator section sides the evaporator sections 11 u. 17 extends.
  • the Evaporator section 17 Compared to the immediately adjacent evaporator section sides is the Evaporator section 17 on its bottom in the installed position Transverse side approximately in the middle of its width with a Provide connection point.
  • a throttle tube serving as an injection tube insertable, which is based on the connection point a soldered connection and is pressure-tight and which generates an injection point 20.
  • a refrigerant channel 21 running in turns is connected, which with its turns extends into the Close area of the lateral edges of the evaporator section 17 extends and which along the connecting web 18 to towards its mechanical connection point on the evaporator section 11 is designed as a double channel. From there he moves over the rear wall area 13 to the ceiling area 14 out, where he at a in the direction of flow of Refrigerant after the injection point 16 lying connection point in the rear wall area 13 with the refrigerant channel arrangement of the evaporator section 11 is connected.
  • the evaporator section 11 is another refrigeration, evaporator section for cooling in a refrigerator compartment 22 upstream, which via a connecting bridge 23 mechanically connected to the evaporator section 11 is.
  • the connecting web 23 is on the connecting web 18 opposite long side of the evaporator board 10 provided and runs along the bottom region 12 and the evaporator section 17, the connecting web 23 on both to avoid thermal bridges through im Fixed narrow tabs spaced from each other is.
  • the connecting web 23 is with a double channel executed refrigerant channel 25, which in the Connection area of the connecting web 23 to the evaporator section 11 again to a single-pass refrigerant channel is brought together and via the bottom region 12, the rear wall region 13 and the ceiling area 14, which is after the injection point 16 lying connection point in the rear wall area 13 is supplied.
  • This is both on the evaporator section 17 and also connected to the evaporator section 22 and serves to fix and stabilize the evaporator section 22 during the manufacturing process of the evaporator 10, and after fixing the evaporator 10 to a Refrigerator is cut to ensure heat conduction between the To largely prevent evaporator sections 17 and 22 and thus the thermal decoupling between these two Evaporator sections 17 and 22 improve.
  • Each of the evaporator sections 11, 17 and 22 is targeted via electrically controllable solenoid valves, not shown with liquid refrigerant, the solenoid valves depending on a refrigeration request from the refrigeration compartments of the refrigerator are controlled.

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

Description

Die Erfindung betrifft einen Verdampfer, insbesondere für verdichterbetriebene Haushaltsgeräte, mit wenigstens zwei als Wärmetauschflächen dienenden Verdampferabschnitten unterschiedlicher Kälteleistung, welchen das von einem Kompressor geförderte Kältemittel über Einspritzstellen zugeführt ist und welche zu einer zusammenhängenden Blechplatine verbunden sind.The invention relates to an evaporator, in particular for compressor-operated household appliances, with at least two evaporator sections serving as heat exchange surfaces different cooling capacity, which is the refrigerant delivered by a compressor is fed via injection points and which to a coherent sheet metal board are connected.

Aus der britischen Patentschrift GB-A-856 477 ist eine zwei Abschnitte, nämlich einen Gefrierfachabschnitt und einen Kühlfachabschnitt aufweisende Verdampferplatine bekannt, welche eine in Kühlfachabschnitt angeordnete Kältemitteleinspritzstelle besitzt, von wo aus das eingespritzte Kältemittel nachdem es den Kühlfachabschnitt zumindest in einem gewissen Bereich durchflossen hat, dem Gefrierfachabschnitt zugeführt ist. Hierdurch wird die Temperatur des Kühlfachabschnitts durch den darauf angeordneten, an der Kältemitteleinspritzstelle zum Gefrierfach führenden Kältemittelkanal maßgeblich beeinflußt.From British Patent GB-A-856 477 there is a two sections, namely a freezer section and an evaporator board having a refrigerator compartment section is known, which has a refrigerant injection point arranged in the refrigerator compartment section, from where the injected refrigerant after it reaches the refrigerator compartment section at least to some extent Has flowed through the area, the freezer compartment section is fed. This will make the Temperature of the refrigerator compartment section through that arranged thereon, at the refrigerant injection point Refrigerant duct leading to the freezer compartment is significantly influenced.

Ferner ist in der DE-OS 38 04 863 eine Verdampferplatine gezeigt und beschrieben, welche sich zum Einsatz in einem Kühlgerät mit drei thermisch voneinander getrennten Kühlfächern eignet, von denen jedes durch eine Verdampferabschnitt des platinenartigen Verdampfers gekühlt ist. Jedem der Verdampferabschnitte ist dabei ein zur Druckminderung des von einem Verdichter geförderten Kältemittels dienendes Einspritzrohr zugeordnet, welche in einer Zunge der Verdampferplatine angeordnet sind. Die an die Einspritzrohre anschließenden Zuführkanäle für das Kältemittel zu den Kältemittel-Kanalanordnungen der einzelnen Verdampferabschnitte sind entlang eines allen drei Verdampferabschnitten gemeinsamen Platinenbereichs an die jeweilige Kanalanordnung des Verdampferabschnitts herangeführt, wodurch es zu Überlappungen der Kältemittel-Zuführkanalabschnitte kommt. Bedingt durch diese Übelappungen der Kältemittel-Zuführkanäle findet trotz der für jeden Verdampferabschnitt vorgesehenen Einspritzstelle eine unerwünschte und nicht unerhebliche Temperaturbeeinflussung des von dem jeweiligen Verdampferabschnitt gekühlten Kühlfaches statt.Furthermore, an evaporator board is shown and described in DE-OS 38 04 863, which for use in a cooling device with three thermally separated cooling compartments Suitable, each through an evaporator section of the board-like evaporator is cooled. Each of the evaporator sections is one for reducing the pressure of one Compressor-assisted refrigerant serving injection tube, which in a Tongue of the evaporator board are arranged. The feed channels connected to the injection pipes for the refrigerant to the refrigerant channel arrangements of the individual evaporator sections are along a board area common to all three evaporator sections to the respective channel arrangement of the evaporator section led to overlap of the refrigerant supply channel sections is coming. Conditional on this The refrigerant supply channels are badly hit despite the injection point provided for each evaporator section an undesirable and not insignificant temperature influence that cooled by the respective evaporator section Freezer instead.

Aufgabe der Erfindung ist es, aufbauend auf diesem Stand der Technik, Maßnahmen vorzuschlagen, aufgrund welcher eine Temperaturbeeinflussung des jeweilig anderen Verdampferabschnitts vermieden ist.The object of the invention is based on this state of the Technology to propose measures on the basis of which a temperature influence of the other evaporator section is avoided.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß jeder der Verdampferabschnitte an seiner Wärmetauschfläche mit einer Einspritzstelle für das Kältemittel ausgestattet ist, und daß die Verdampferabschnitte innerhalb der Blechplatine thermisch voneinander weitestgehend entkoppelt sind.This object is achieved according to the invention in that each of the evaporator sections on its heat exchange surface equipped with an injection point for the refrigerant and that the evaporator sections within the sheet metal board are largely thermally decoupled from one another.

Durch die dezentrale, jedem Verdampferabschnitt separat zugeordnete Einspritzstelle ist eine gezielte Beaufschlagung des mit Kältemittel zu versorgenden Verdampferabschnitts gewährleistet, ohne daß über einen der Verdampferabschnitte hinwegführende Kältemittel-Zuführkanäle zum anderen Verdampferabschnitt die Temperatur dieses Verdampferabshnitts ungewollt beeinflussen. Durch eine derartige Ansteuerung der einzelnen Verdampferabschnitte ist demzufolge eine exakt steuerbare Abkühlung eines jeden durch einen solchen Verdampferabschnitt gekühlten Kühlfaches möglich.Due to the decentralized, separately assigned to each evaporator section Injection point is a targeted application of the evaporator section to be supplied with refrigerant, without passing over one of the evaporator sections refrigerant supply channels leading away to the other evaporator section the temperature of this evaporator section unwanted influence. By controlling the individual evaporator sections is therefore an exact one controllable cooling of each by such an evaporator section cooled refrigerator compartment possible.

Nach einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß drei Verdampferabschnitte vorgesehen sind, von denen einer eine höhere Kälteleistung als die beiden anderen aufweist und jedem der anderen Verdampferabschnitte in Reihenschaltung hochgeschaltet ist.According to a further preferred embodiment of the object the invention provides that three evaporator sections are provided, one of which has a higher cooling capacity than the other two and each of the others Evaporator sections switched up in series is.

Durch eine derartige Verdampferanordnung wird der Verdampferabschnitt höherer Kälteleistung bei Beaufschlagung des Verdampferabschnitts geringerer Kälteleistung stets zusätzlich mit flüssigem Kältemittel beaufschlagt und somit mitgekühlt, so daß die Kältebedarfszyklen für den Verdampfer höherer Kälteleistung entsprechend vergrößert werden können.The evaporator section is formed by such an evaporator arrangement higher cooling capacity when the Evaporator section of lower cooling capacity always additional charged with liquid refrigerant and thus also cooled, so that the refrigeration demand cycles for the evaporator are higher Cooling capacity can be increased accordingly.

Besonders einfach herzustellen, aber einen hohen Wirkungsgrad weist eine thermische Entkopplung auf, wenn nach einer nächsten bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, daß die Verdampferabschnitte thermisch durch Aussparungen in der Blechplatine zwischen den einzelnen Verdampferabschnitten entkoppelt sind.Particularly easy to manufacture, but high efficiency exhibits thermal decoupling if after a next preferred embodiment of the subject of Invention is provided that the evaporator sections thermally through cutouts in the sheet metal between the individual evaporator sections are decoupled.

Nach einer weiteren vorteilhaften Ausgestaltung des Gegenstandes der Erfindung ist vorgesehen, daß jeder der Verdampferabschnitte geringerer Kälteleistung seine Einspritzstelle an der Wärmetauschfläche im Nahbereich seiner vom Verdampferabschnitt höherer Kälteleistung abgewandten Verdampferabschnittsseite aufweist.According to a further advantageous embodiment of the object the invention provides that each of the evaporator sections lower cooling capacity its injection point on the heat exchange surface in the vicinity of its from the evaporator section higher cooling capacity facing away from the evaporator section having.

Durch eine derartige Lösung ist einerseits der Strömungsweg für das Kältemittel verkürzt und andererseits sind siphonartige Kältemittel-Kanalanordnungen innerhalb des Verdampferabschnitts vermieden, so daß die Geräuschentwicklung vor allem in den Stehzeiten des Kältemittelverdichters deutlich verringert sind. Such a solution is on the one hand the flow path shortened for the refrigerant and on the other hand are siphon-like Refrigerant channel arrangements within the evaporator section avoided, so the noise especially clearly in the idle times of the refrigerant compressor are reduced.

Eine besonders günstige und zweckmäßige kältetechnische Ankopplung der beiden Verdampferabschnitte ergibt sich, wenn nach einer weiteren vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß der Verdampferabschnitt höherer Kälteleistung mit den jeweils anderen Verdampferabschnitten über einen mit Kältemittelkanälen versehenen Verbindungssteg kältetechnisch verbunden sind.A particularly inexpensive and practical refrigeration connection of the two evaporator sections results if according to a further advantageous embodiment of the object the invention provides that the evaporator section higher cooling capacity with the other evaporator sections via a refrigerant channel Connection bridge are connected by refrigeration.

Auf besonders einfache Weise ist eine Kältemittelzuführung anschließbar, wenn gemäß einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß die Verdampferabschnitte geringerer Kälteleistung ihre Einspritzstelle im wesentlichen in der Mitte an der vom dem Verdampferabschnitt höherer Kälteleistung abgewandten Verdampferabschnittseite aufweisen.A refrigerant supply is particularly simple connectable if according to a further preferred embodiment the subject matter of the invention provides that the evaporator sections of lower cooling capacity their injection point essentially in the middle of that of the Evaporator section of higher cooling capacity facing away from the evaporator section exhibit.

Außerdem ist durch eine derartige Lösung eine für drei unterschiedliche Temperaturbereiche geeignete Verdampferplatine erzeugt, welche aufgrund des Ortes für die Einspritzstellen kostengünstig herstellbar und zugleich fertigungsfreundlich handhabbar ist.In addition, such a solution is one for three different ones Temperature ranges suitable evaporator board generated which, based on the location for the injection points inexpensive to manufacture and at the same time easy to manufacture is manageable.

Nach einer letzten bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß die beiden Verdampferabschnitte geringerer Kälteleistung zureinander durch einen zwischen ihren benachbarten Abschnittseiten vorgesehenen Haltesteg fixiert sind.According to a last preferred embodiment of the object the invention provides that the two evaporator sections lower cooling capacity to each other one provided between their adjacent section sides Retaining bridge are fixed.

Durch den Haltesteg zwischen den beiden Verdampferabschnitten ist eine Fixierung und Stabilisierung der beiden Verdampferabschnitte zueinander erreicht, so daß das Handling der Verdampferplatine in den einzelnen Fertigungsabschnitten deutlich verbessert ist. Through the holding bridge between the two evaporator sections is a fixation and stabilization of the two evaporator sections reached each other so that the handling the evaporator board in the individual manufacturing stages is significantly improved.

Die Erfindung ist in der nachfolgenden Beschreibung am Beispiel eines in der beigefügten Zeichnung vereinfacht dargestellten Drei-Temperaturen-Verdampfers erläutert.The invention is illustrated in the following description using the example one shown in simplified form in the accompanying drawing Three-temperature evaporator explained.

Die einzige Figur zeigt einen platinenartigen Verdampfer in gestreckter Darstellung mit drei innerhalb der Platinenfläche angeordneten Verdampferabschnitten.The only figure shows a board-like evaporator in stretched representation with three within the board area arranged evaporator sections.

Ein platinenartigen Verdampfer 10 zum Einsatz in einen nicht dargestellten Mehrtemperaturen-Haushalts-Kältegerät ist aus zwei miteinander durch Preßschweißen verbundenen Aluminium-Blechplatinen gebildet, zwischen welchen die Kältemittel-Kanalanordnung des Verdampfers 10 eingebracht ist. Der Verdampfer 10 weist drei hinsichtlich ihres Flächenanteils verschieden große Verdampferabschnitte auf, von denen der mit dem größten Flächenanteil ausgestattete Verdampferabschnitt 11 als Gefrierfachverdampfer ausgebildet ist. Dieser weist einen Bodenbereich 12, einen Rückwandbereich 13 und einen Deckenbereich 14 auf, welche als Wärmetauschflächen dienen und welche zu diesem Zweck mit einem von Kältemittel durchströmten Kältemittelkanal 15 versehen sind. Das zur Durchströmung des Kältemittelkanals 15 dienende Kältemittel wird dabei im Deckenbereich 14 anhand einer durch Verprägen eines Drosselrohrs ausgebildeten Einspritzstelle 16 dem Kältemittelkanal 15 des Verdampferabschnitts 11 zugeführt.A board-like evaporator 10 for use in a non illustrated multi-temperature household refrigeration device is off two aluminum sheet metal plates joined together by pressure welding formed between which the refrigerant channel arrangement of the evaporator 10 is introduced. The evaporator 10 has three different areas large evaporator sections, of which the one with evaporator section equipped with the largest area share 11 is designed as a freezer compartment evaporator. This points a floor area 12, a rear wall area 13 and one Ceiling area 14, which serve as heat exchange surfaces and which for this purpose is filled with refrigerant Refrigerant channel 15 are provided. The flow of the refrigerant channel 15 serving refrigerant doing so in the ceiling area 14 by stamping one Throttle tube trained injection point 16 the refrigerant channel 15 of the evaporator section 11 is supplied.

Dem Verdampferabschnitt 11 ist strömungstechnisch ein Verdampferabschnitt 17 vorgeschaltet, welcher zur Kühlung eines Null-Grad-Faches dient und welcher über einen Verbindungssteg 18 mit ersterem mechanisch verbunden ist. Zur mechanischen Anbindung dient etwa nur ein Drittel der Länge des Verbindungssteges 18, während der verbleibende Längenabschnitt vom Verdampferabschnitt 11 freigespart ist, so daß der Verdampferabschnitt 11, welcher infolge seiner [-förmigen Einbauformgebung mit seiner am Bodenbereich 12 senkrecht zur Ebene des Verdampferabschnitts 17 angeordnet ist, weitestgehend thermisch von diesem entkoppelt ist. Für den Fall, daß der Verdampferabschnitt 11 nicht wie im vorliegenden Ausführungsbeispiel einer [-förmigen Formgebung unterworfen ist, sondern als ebene Platine ausgebildet ist, dient zur thermischen Entkopplung zwischen den benachbarten Seitenkanten der Verdampferabschnitte 11 und 17 eine Aussparung 19, welche sich im wesentlichen über die gesamte Breite der zueinander benachbart liegenden Verdampferabschnittsseiten der Verdampferabschnitte 11 u. 17 erstreckt. Gegenüber den unmittelbar benachbarten Verdampfer-Abschnittsseiten ist der Verdampferabschnitt 17 auf seiner in Einbaulage unten befindlichen Querseite in etwa mittig zu deren Breite mit einer Anschlußstelle versehen. In diese ist zur Einbringung ein als Einspritzrohr dienendes, nicht dargestellten Drosselrohres einbringbar, welches in der Anschlußstelle anhand einer Lötverbindung und druckdicht festgesetzt ist und welches eine Einspritzstelle 20 erzeugt. An die Einspritzstelle 20 ist ein in Windungen verlaufender Kältemittelkanal 21 angeschlossen, welcher sich mit seinen Windungen bis in den Nahbereich der seitlichen Ränder des Verdampferabschnitts 17 erstreckt und welcher entlang des Verbindungssteges 18 bis hin zu dessen mechanischen Anbindungsstelle an dem Verdampferabschnitt 11 als Doppelkanal ausgeführt ist. Von dort ist er einzügig über den Rückwandbereich 13 bis in den Deckenbereich 14 geführt, wo er an einer in Strömungsrichtung des Kältemittels nach der Einspritzstelle 16 liegenden Einbindungsstelle im Rückwandbereich 13 mit der Kältemittel-Kanalanordnung des Verdampferabschnitts 11 verbunden ist. In terms of flow technology, the evaporator section 11 is an evaporator section 17 upstream, which for cooling a Serves zero degree compartment and which via a connecting bridge 18 is mechanically connected to the former. For mechanical Connection serves only about a third of the length of the Connecting web 18, while the remaining length is saved from the evaporator section 11, so that the evaporator section 11, which due to its [-shaped Installation shape with its vertical on the floor area 12 to the level of the evaporator section 17 is largely arranged is thermally decoupled from this. For the Case that the evaporator section 11 is not as here Embodiment subjected to a [-shaped shape is, but is designed as a flat circuit board, serves for thermal decoupling between the adjacent side edges the evaporator sections 11 and 17 a recess 19, which extends essentially over the entire width of the mutually adjacent evaporator section sides the evaporator sections 11 u. 17 extends. Compared to the immediately adjacent evaporator section sides is the Evaporator section 17 on its bottom in the installed position Transverse side approximately in the middle of its width with a Provide connection point. In this is for insertion a throttle tube, not shown, serving as an injection tube insertable, which is based on the connection point a soldered connection and is pressure-tight and which generates an injection point 20. To the injection point 20, a refrigerant channel 21 running in turns is connected, which with its turns extends into the Close area of the lateral edges of the evaporator section 17 extends and which along the connecting web 18 to towards its mechanical connection point on the evaporator section 11 is designed as a double channel. From there he moves over the rear wall area 13 to the ceiling area 14 out, where he at a in the direction of flow of Refrigerant after the injection point 16 lying connection point in the rear wall area 13 with the refrigerant channel arrangement of the evaporator section 11 is connected.

Dem Verdampferabschnitt 11 ist kältetechnisch ein weiterer, zur Kälteerzeugung in einem Kühlfach dienender Verdampferabschnitt 22 vorgeschaltet, welcher über einen Verbindungssteg 23 mechanisch mit dem Verdampferabschnitt 11 mechanisch verbunden ist. Der Verbindungssteg 23 ist an der dem Verbindungssteg 18 gegenüberliegenden Längsseite der Verdampferplatine 10 vorgesehen und verläuft entlang des Bodenbereichs 12 und des Verdampferabschnitts 17, wobei der Verbindungssteg 23 an beiden zur Vermeidung von Wärmebrücken durch im Abstand voneinander angeordneten schmalen Haltezungen fixiert ist. Der Verbindungssteg 23 ist mit einem als Doppelkanal ausgeführten Kältemittelkanal 25 versehen, welcher im Anbindungsbereich des Verbindungssteges 23 an den Verdampferabschnitt 11 wieder zu einem einzügigen Kältemittelkanal zusammengeführt ist und über den Bodenbereich 12, dem Rückwandbereich 13 und dem Deckenbereich 14, der nach der Einspritzstelle 16 liegenden Einbindungsstelle im Rückwandbereich 13 zugeführt ist. Ebenso wie im Bereich der Anbindungsstelle des Verbindungssteges 23 an den Verdampferabschnitt 11 ist der als Doppelkanal ausgeführte Kältemittelkanal 25 im Bereich seines Übergangs zum Verdampferabschnitt 22 wieder zu einem einzügigen Kanal zusammengeführt. Dieser ist in Windungen verlaufend, über die Höhe des Verdampferabschnitts 22 angeordnet und an dessen vom Verdampferabschnitt 17 abgewandten, in Einbaulage des Verdampfers 10 untenliegenden Querseite mit einer Anschlußstelle verbunden. Diese dient zur Aufnahme eines nicht dargestellten Einspritzrohres, welches in der Anschlußstelle durch eine Lötverbindung druckdicht am Verdampferabschnitt 22 zur Ausbildung einer Einspritzstelle 26 festgesetzt ist. Zwischen dem Verdampferabschnitt 22 und dem Verdampferabschnitt 17 ist ein zu deren thermischen Entkopplung dienende Aussparung 27 vorgesehen, welche sich zwischen dem Verbindungssteg 23 und einem Haltesteg 28 erstreckt. Dieser ist sowohl an dem Verdampferabschnitt 17 als auch an den Verdampferabschnitt 22 angebunden und dient zur Fixierung und Stabilisierung des Verdampferabschnitts 22 während des Fertigungsablaufes des Verdampfers 10, wobei er nach der Fixierung des Verdampfers 10 an einem Kältegerät durchtrennt ist, um die Wärmeleitung zwischen den Verdampferabschnitten 17 und 22 weitestgehend zu unterbinden und somit die thermische Entkopplung zwischen diesen beiden Verdampferabschnitten 17 und 22 zu verbessern.The evaporator section 11 is another refrigeration, evaporator section for cooling in a refrigerator compartment 22 upstream, which via a connecting bridge 23 mechanically connected to the evaporator section 11 is. The connecting web 23 is on the connecting web 18 opposite long side of the evaporator board 10 provided and runs along the bottom region 12 and the evaporator section 17, the connecting web 23 on both to avoid thermal bridges through im Fixed narrow tabs spaced from each other is. The connecting web 23 is with a double channel executed refrigerant channel 25, which in the Connection area of the connecting web 23 to the evaporator section 11 again to a single-pass refrigerant channel is brought together and via the bottom region 12, the rear wall region 13 and the ceiling area 14, which is after the injection point 16 lying connection point in the rear wall area 13 is supplied. Just like in the area of the connection point of the connecting web 23 to the evaporator section 11 is the refrigerant channel designed as a double channel 25 in the area of its transition to the evaporator section 22 merged again into a single channel. This is curled over the height of the evaporator section 22 arranged and at the evaporator section thereof 17 facing away, lying below in the installed position of the evaporator 10 Cross side connected to a junction. This serves to receive an injection pipe, not shown, which in the connection point by a solder connection pressure-tight on the evaporator section 22 to form a Injection point 26 is fixed. Between the evaporator section 22 and the evaporator section 17 is one of their recess 27 for thermal decoupling is provided, which is between the connecting web 23 and a holding web 28 extends. This is both on the evaporator section 17 and also connected to the evaporator section 22 and serves to fix and stabilize the evaporator section 22 during the manufacturing process of the evaporator 10, and after fixing the evaporator 10 to a Refrigerator is cut to ensure heat conduction between the To largely prevent evaporator sections 17 and 22 and thus the thermal decoupling between these two Evaporator sections 17 and 22 improve.

Jeder der Verdampferabschnitte 11, 17 und 22 ist gezielt über elektrisch ansteuerbare, nicht gezeigte Magnetventile mit flüssigem Kältemittel beaufschlagbar, wobei die Magnetventile in Abhängigkeit einer Kälteanforderung aus den Kältefächern des Kältegerätes gesteuert sind.Each of the evaporator sections 11, 17 and 22 is targeted via electrically controllable solenoid valves, not shown with liquid refrigerant, the solenoid valves depending on a refrigeration request from the refrigeration compartments of the refrigerator are controlled.

Das den Verdampferabschnitten 11, 17 und 22 über die diesen zugeordneten Einspritzstellen 16, 20 und 26 zugeführte flüssige Kältemittel wird nach seinem Verdampfen in gasförmigen Zustand über eine einzige, im Deckenbereich 14 des Gefrierfachverdampfers 11 angeordneten Saugstelle 29 von einem Kältemittelverdichter abgesaugt.The evaporator sections 11, 17 and 22 over these associated injection points 16, 20 and 26 supplied liquid Refrigerant becomes gaseous after it evaporates Condition over a single, in the ceiling area 14 of the freezer evaporator 11 arranged suction point 29 from a refrigerant compressor aspirated.

Claims (7)

  1. Evaporator, especially for compressor-operated domestic appliances, with at least two evaporator sections (11, 17, 22), which serve as heat exchange surfaces, of different cooling performance, to which the refrigerant conveyed by a compressor is fed by way of injection points (16, 20, 26) and which are connected into a continuous sheet metal plate, characterised in that each of the evaporator sections (11, 17, 22) is equipped at its heat exchange surface with an injection point (16, 20, 26) for the refrigerant and that the evaporator sections (11, 17, 22) within the sheet metal plate are thermally decoupled from one another as far as possible.
  2. Evaporator according to claim 1, characterised in that three evaporator sections (11, 17, 22) are provided, of which one has a higher cooling performance than the other two and is connected in series to each of the other evaporator sections (17, 22) downstream thereof.
  3. Evaporator according to claim 1 or 2, characterised in that the evaporator sections (11, 17, 22) are thermally decoupled by cutouts (19, 27) in the sheet metal plate between the individual evaporator sections (11, 17, 22).
  4. Evaporator according to one of claims 1 to 3, characterised in that each of the evaporator sections (17, 22) of lower cooling performance has its injection point at the heat exchange surface (20, 26) in the vicinity of its evaporator section side remote from the evaporator section (11) of higher cooling performance.
  5. Evaporator according to one of claims 1 to 4, characterised in that the evaporator section (11) of higher cooling performance is connected in terms of flow with the respective other evaporator section (17, 22) by way of a connecting web (18, 23) provided with refrigerant channels (15, 25).
  6. Evaporator according to one of claims 1 to 5, characterised in that the evaporator sections (17, 22) of lower cooling performance have their injection points (20, 26) substantially in the centre of the evaporator section side remote from the evaporator section (11) of higher cooling performance.
  7. Evaporator according to claim 6, characterised in that the two evaporator sections (17, 22) of lower cooling performance are fixed relative to one another by a holding web (28) provided between their adjacent section sides.
EP96101434A 1995-03-16 1996-02-01 Evaporator, in particular for compressor-operated domestic refrigerators Expired - Lifetime EP0732554B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19509571A DE19509571A1 (en) 1995-03-16 1995-03-16 Evaporators, in particular for compressor-operated household refrigeration devices
DE19509571 1995-03-16

Publications (3)

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EP0732554A2 EP0732554A2 (en) 1996-09-18
EP0732554A3 EP0732554A3 (en) 1997-03-12
EP0732554B1 true EP0732554B1 (en) 2000-11-22

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ID=7756863

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EP96101434A Expired - Lifetime EP0732554B1 (en) 1995-03-16 1996-02-01 Evaporator, in particular for compressor-operated domestic refrigerators

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EP (1) EP0732554B1 (en)
DE (2) DE19509571A1 (en)
ES (1) ES2153506T3 (en)
TR (1) TR199600151A2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1296073B1 (en) * 1997-11-06 1999-06-09 Whirlpool Co METHOD TO OBTAIN A ONE-PIECE EVAPORATOR FOR REFRIGERANT CIRCUITS AND EVAPORATOR OBTAINED

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB856477A (en) * 1958-06-30 1960-12-14 Gen Motors Corp Improvements in or relating to refrigerators, and to methods of making evaporators therefor
DE1809673A1 (en) * 1968-11-19 1970-06-04 Ver Deutsche Metallwerke Ag Plate evaporator
DE3741140C1 (en) * 1987-12-04 1989-06-08 Schmoele Metall R & G Cooling plate
DE3804863A1 (en) * 1988-02-17 1989-08-31 Schmoele Metall R & G Cooling plate for a refrigerator
DE4141641A1 (en) * 1991-12-17 1993-06-24 Bosch Siemens Hausgeraete SECOND TEMPERATURE REFRIGERATOR
DE4242776A1 (en) * 1992-12-17 1994-06-23 Bosch Siemens Hausgeraete Cooling device, in particular multi-temperature cooling device
DE29504538U1 (en) * 1995-03-16 1995-05-18 Bosch-Siemens Hausgeräte GmbH, 81669 München Evaporator arrangement, in particular compressor-operated household refrigeration devices

Also Published As

Publication number Publication date
DE19509571A1 (en) 1996-09-19
TR199600151A2 (en) 1996-11-21
ES2153506T3 (en) 2001-03-01
EP0732554A2 (en) 1996-09-18
DE59606153D1 (en) 2000-12-28
EP0732554A3 (en) 1997-03-12

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