WO2007031470A2 - No-frost cooling device - Google Patents

No-frost cooling device Download PDF

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Publication number
WO2007031470A2
WO2007031470A2 PCT/EP2006/066167 EP2006066167W WO2007031470A2 WO 2007031470 A2 WO2007031470 A2 WO 2007031470A2 EP 2006066167 W EP2006066167 W EP 2006066167W WO 2007031470 A2 WO2007031470 A2 WO 2007031470A2
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
evaporator
heater
parallel
frost
Prior art date
Application number
PCT/EP2006/066167
Other languages
German (de)
French (fr)
Other versions
WO2007031470A3 (en
Inventor
Michaela Malisi
Original Assignee
BSH Bosch und Siemens Hausgeräte 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 Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Priority to EP06793352A priority Critical patent/EP1929218A2/en
Priority to US11/991,901 priority patent/US20090133427A1/en
Publication of WO2007031470A2 publication Critical patent/WO2007031470A2/en
Publication of WO2007031470A3 publication Critical patent/WO2007031470A3/en

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F25D21/08—Removing frost by electric heating
    • 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
    • F25D23/00—General constructional features
    • F25D23/006—General constructional features for mounting refrigerating machinery components
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/065—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air return
    • F25D2317/0655—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air return through the top
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/066—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air supply
    • F25D2317/0665—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air supply from the top
    • 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
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/068—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans
    • F25D2317/0683—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans the fans not of the axial type

Definitions

  • the present invention relates to a no-frost refrigerator.
  • Such an assembly conventionally comprises a carrier on which an evaporator and a heater are housed.
  • the assembly is mounted in a cooling space of the refrigerator close to the ceiling for the delimitation of a chamber and communicates with the refrigerator or cold rooms by forced ventilation.
  • the separation of the evaporator chamber from the cooling chambers allows the evaporator to be heated with the forced ventilation switched off with the aid of the heater so as to defrost ice, which is reflected in the course of operation of the refrigerator on the evaporator.
  • the heater is designed as a tube heater, i. in the form of a tube, in which a bad electrical conductor is housed, which can be acted upon for heating with electricity.
  • the pipe is laid on a planteosuring, i. it has a plurality of parallel sections, two of which are connected by a pipe bend. The beginning and end of the tube are thus at opposite edges of the varnishleitblechs.
  • Object of the present invention is to provide no-frost refrigeration device with an evaporator assembly, in which this step can be omitted.
  • the beginning and end of the pipe heating are located on two immediately adjacent parallel pipe sections, electrical leads connected thereto can be led out of the evaporator chamber on a short path which does not require a separate fixation of the supply lines on the carrier.
  • two parallel pipe sections which are located on opposite sides of the pipe heater, connected to each other directly by a pipe bend.
  • this pipe bend runs in the same plane as the parallel pipe sections.
  • the pipe bend as well as the parallel pipe sections can be placed below the evaporator and heat it from below.
  • the pipe bend extends outside the plane of the parallel pipe sections, preferably along an end face of the evaporator, along or across the evaporator.
  • the pipe heater In order to simplify the installation of the pipe heater, it is preferably fixed at the level of the pipe sections connecting the parallel pipe sections to projections of the carrier. Such a fixation can in particular make the conventional heat conducting plate as a carrier of the pipe heater superfluous.
  • the protrusions preferably comprise at least one first protrusion externally abutting a central portion of the arch and a second protrusion inwardly abutting both ends of the bend at the transition between the bend and the adjoining parallel tube sections.
  • This second projection can also be divided into two individual projections which abut one end of the arc at a time.
  • the first projection preferably forms a hook that encompasses the bow.
  • FIG. 1 shows a schematic section through the upper region of a no-frost
  • FIG. 2 is a view of the pipe heater according to a first embodiment of
  • Fig. 3 is a perspective view of the pipe heater according to a second
  • FIG. 4 shows the tube heater from FIG. 2 mounted on a carrier
  • Fig. 5 is a detail view illustrating the installation of the pipe heater according to a modified embodiment.
  • FIG. 6 shows a section of the detail from FIG. 5.
  • Fig. 1 shows a schematic section through the upper portion of a no-frost refrigeration device according to the invention.
  • the refrigerator has a body 1 and a door 2, which are each realized in a conventional manner as filled with a heat-insulating foam layer 3 hollow body.
  • the interior of the body 1 is divided by a likewise heat-insulating partition 4 into an evaporator chamber 5 and a cooling compartment 6.
  • the partition 4 is formed by the bottom of a support 7 for an evaporator assembly on which a known finned evaporator 8 is mounted.
  • the carrier 7 is mounted at a distance from the ceiling of the body 1 and defines together with the side walls of the body 1, the evaporator chamber 5 from.
  • the carrier 7 has an air inlet passage 9 on its side facing the door 2 and an air outlet passage 10 on its side facing the rear wall of the body 1 in a rear region of the evaporator chamber 5, behind the air outlet passage 10 of the carrier 7, a fan 1 1 housed with paddle wheel 12 and motor 13, the air from the evaporator chamber 5 subtracts and presses in an air duct 14.
  • the air duct 14 extends only through the partition wall 4 and opens into the immediately below cooling compartment 6.
  • the air duct 14 could alternatively be guided within the rear wall of the body 1 and with a plurality of through holes to the cooling compartment Be provided over the 6 flowing in the air duct cold air over the height of the cooling compartment. 6 - A -
  • a valve could be provided in the air duct 14, which selectively feeds the cold air flow via various branches of the air duct to one of a plurality of compartments of the refrigeration appliance, for example the refrigerated compartment 6 and a freezer compartment, not shown.
  • the pipe heater 20 comprises a plurality of mutually parallel rectilinear pipe sections 21a, b, c, ..., each of which except the rear left Tube section 21 a is connected to an immediately adjacent section 21 through a pipe bend 22.
  • the pipe section 21 a is connected to the front, right rectilinear portion 21 r by an elongated pipe bend 23 which extends over the entire width of the pipe heater 20.
  • the beginning and end of the pipe heater 20 are so at adjacent parallel portions 21 a, b, so that can be led out to these subsequent supply wires 24 together on the shortest route from the evaporator chamber 5.
  • the evaporator 8 may be, for example, a known and not shown here in detail finned evaporator, which is arranged parallel to the pipe sections 21 or perpendicular thereto slats.
  • FIG 3 shows a modified embodiment of the pipe heater 20, in which the elongated pipe bend 23 is led out of the plane of the pipe sections 21 and extends in front of the side of the evaporator 8 facing the air outlet opening 10.
  • FIG. 4 shows, in a perspective view, the pipe heater 20 of FIG. 2 mounted on the support 7.
  • the pipe sections 21 rest on a base plate 25 of the support 7, which slopes slightly from a front wall 26 surrounding the air inlet opening 9 to an edge 27 is.
  • Behind the edge 27 follows a strong sloping portion 28 and a groove 29, in which - as it represents the deepest region of the bottom plate 25 - accumulating from the evaporator 8 expired condensation and through an opening 30 in the bottom of the channel to a known and evaporator not described here drains off.
  • Each of the rear side 16 of the support 7 facing pipe bends 22 is fixed to the bottom plate 25 by a group of three pins 31, one of which touches the vertex on the outside of the sheet 22 and the other two at the Inside the bow in each case in the transition region to the rectilinear pipe sections 21 abut.
  • the position of each pipe bend 22 is set exactly in the horizontal.
  • bifurcated support members 32 projecting from the bottom plate 25 are provided for securing the evaporator 8 thereon by inserting a refrigerant tube of the evaporator into the fork of the support members 32 and latching them in a widening of the fork.
  • FIG. 5 shows a detailed view of the bottom of the carrier 7 in the vicinity of the edge 27 according to a slightly modified embodiment compared to FIG. 4, wherein in this embodiment the two pins 31 contacting the inside of the sheet 22 have a wide, upwardly tapered projection 33 are replaced and the top of the sheet 22 contacting pin 31 has a better in the section of Fig. 6 to be recognized recess 34 into which the sheet 22 engages.
  • the pipe heater 20 is mounted by first of its rear side adjacent pipe bends 22 in a vertical orientation, as shown in phantom in FIGS. 5 and 6, are placed on the portion 28 of the bottom plate 25.
  • the pin 31 acts as a hook, which prevents the pipe bend 22 from being lifted from the portion 28.
  • the wide projection 33 prevents slippage of the sheet to the left in Fig. 6, so that the pipe bend from the recess 33 can not disengage and the pipe heater 20 is thus firmly locked.
  • the front, the air inlet opening 9 facing pipe bends 22 may be by pins 31 and projections 33 similar to those shown in Fig. 5 and 6 are locked to the bottom plate 25, however, in these latter projections a recess in which engages the apex of the pipe bend, very must be flat to a pressing of the To allow pipe bends 22 'between the pins and projections in a horizontal orientation.
  • the fully assembled pipe heater 20 is under a bending stress, which prevents rattling of the pipe heater due to vibrations occurring during operation of the refrigerator.

Landscapes

  • 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)
  • Defrosting Systems (AREA)
  • Resistance Heating (AREA)

Abstract

The invention relates to an evaporator unit for a no-frost cooling device which comprises an evaporator (8), a tubular heating device (20) and a housing (7) which surrounds the evaporator (20) and the tubular heating device (8). Said tubular heating device (20) comprises a plurality of parallel tubular sections (21) which are connected together in such a manner that they form a single piece. Two parallel tubular sections (21) which are directly adjacent to each other are located at the beginning and at the end of the tubular heating device (20).

Description

No-Frost-Kältegerät No-frost refrigerating appliance
Die vorliegende Erfindung betrifft ein No-Frost-Kältegerät. Eine solche Baugruppe umfasst herkömmlicherweise einen Träger auf dem ein Verdampfer und eine Heizung untergebracht sind. Die Baugruppe wird in einem Kühlraum des Kältegeräts deckennah zur Abgrenzung einer Kammer montiert und kommuniziert mit dem Kühlraum oder Kühlräumen durch eine Zwangsbelüftung. Die Trennung der Verdampferkammer von den Kühlräumen erlaubt es, den Verdampfer bei abgeschalteter Zwangsbelüftung mit Hilfe der Heizung zu erwärmen, um so Eis abzutauen, das sich im Laufe des Betriebs des Kältegeräts am Verdampfer niederschlägt.The present invention relates to a no-frost refrigerator. Such an assembly conventionally comprises a carrier on which an evaporator and a heater are housed. The assembly is mounted in a cooling space of the refrigerator close to the ceiling for the delimitation of a chamber and communicates with the refrigerator or cold rooms by forced ventilation. The separation of the evaporator chamber from the cooling chambers allows the evaporator to be heated with the forced ventilation switched off with the aid of the heater so as to defrost ice, which is reflected in the course of operation of the refrigerator on the evaporator.
Bei einer bekannten Baugruppe dieser Art ist die Heizung als eine Rohrheizung ausgebildet, d.h. in Form eines Rohrs, in dem ein schlechter elektrischer Leiter untergebracht ist, der zum Erhitzen mit Strom beaufschlagt werden kann. Bei der bekannten Rohrheizung ist das Rohr mäanderartig auf einem Wärmeleitblech verlegt, d.h. es hat eine Vielzahl von parallelen Abschnitten, von denen zwei benachbarte jeweils durch einen Rohrbogen verbunden sind. Anfang und Ende des Rohrs befinden sich dadurch an entgegengesetzten Rändern des Wärmeleitblechs. Um die mit den zwei Enden des Rohrs verbundenen elektrischen Zuleitungen zusammenzuführen und gemeinsam aus dem Gehäuse herauszuführen, muss wenigstens eine dieser Zuleitungen über eine etwa einer Kantenlänge des Wärmeleitblechs entsprechende Entfernung hinweg in dem Gehäuse verlegt und fixiert werden, was einen zusätzlichen Arbeitsschritt nach der Montage der Rohrheizung in dem Gehäuse erforderlich macht.In a known assembly of this type, the heater is designed as a tube heater, i. in the form of a tube, in which a bad electrical conductor is housed, which can be acted upon for heating with electricity. In the known pipe heating, the pipe is laid on a Wärmeleitblech meandering, i. it has a plurality of parallel sections, two of which are connected by a pipe bend. The beginning and end of the tube are thus at opposite edges of the Wärmeleitblechs. In order to merge the electrical leads connected to the two ends of the tube and to lead them out of the housing together, at least one of these leads must be laid and fixed in the housing over a distance corresponding approximately to an edge length of the heat conduction plate, which is an additional step after assembly of the Pipe heating in the housing is required.
Aufgabe der vorliegenden Erfindung ist, No-Frost-Kältegerät mit einer Verdampfer- Baugruppe anzugeben, bei der dieser Arbeitsschritt entfallen kann.Object of the present invention is to provide no-frost refrigeration device with an evaporator assembly, in which this step can be omitted.
Indem erfindungsgemäß Anfang und Ende der Rohrheizung sich an zwei unmittelbar benachbarten parallelen Rohrabschnitten befinden, können daran angeschlossene elektrische Zuleitungen auf einem kurzen, eine eigene Fixierung der Zuleitungen am Träger nicht erfordernden Weg aus dem Verdampferraum herausgeführt werden. Um Anfang und Ende der Rohrheizung auf parallele Rohrabschnitte zu legen, sind vorzugsweise zwei parallele Rohrabschnitte, die sich an entgegengesetzten Seiten der Rohrheizung befinden, miteinander durch einen Rohrbogen unmittelbar verbunden.By according to the invention the beginning and end of the pipe heating are located on two immediately adjacent parallel pipe sections, electrical leads connected thereto can be led out of the evaporator chamber on a short path which does not require a separate fixation of the supply lines on the carrier. In order to lay the beginning and end of the pipe heater on parallel pipe sections, preferably two parallel pipe sections, which are located on opposite sides of the pipe heater, connected to each other directly by a pipe bend.
Bei einer ersten Ausgestaltung verläuft dieser Rohrbogen in derselben Ebene wie die parallelen Rohrabschnitte. In diesem Fall kann der Rohrbogen genauso wie die parallelen Rohrabschnitte unterhalb des Verdampfers platziert sein und diesen von unten beheizen.In a first embodiment, this pipe bend runs in the same plane as the parallel pipe sections. In this case, the pipe bend as well as the parallel pipe sections can be placed below the evaporator and heat it from below.
Einer zweiten Ausgestaltung zufolge verläuft der Rohrbogen außerhalb der Ebene der parallelen Rohrabschnitte, vorzugsweise an einer Stirnseite des Verdampfers entlang oder quer über den Verdampfer hinweg.According to a second embodiment, the pipe bend extends outside the plane of the parallel pipe sections, preferably along an end face of the evaporator, along or across the evaporator.
Um die Montage der Rohrheizung zu vereinfachen, ist sie vorzugsweise in Höhe von die den parallelen Rohrabschnitten verbindenden Rohrbögen an Vorsprüngen des Trägers fixiert. Eine solche Fixierung kann insbesondere das herkömmliche Wärmeleitblech als Träger der Rohrheizung überflüssig machen.In order to simplify the installation of the pipe heater, it is preferably fixed at the level of the pipe sections connecting the parallel pipe sections to projections of the carrier. Such a fixation can in particular make the conventional heat conducting plate as a carrier of the pipe heater superfluous.
Die Vorsprünge umfassen vorzugsweise wenigstens einen ersten Vorsprung, der außenseitig an einem Mittelabschnitt des Bogens anliegt, und einen zweiten Vorsprung, der innenseitig an beiden Enden des Bogens, am Übergang zwischen dem Bogen und den daran anschließenden parallelen Rohrabschnitten, anliegt. Dieser zweite Vorsprung kann auch in zwei einzelne, an jeweils einem Ende des Bogens anliegende Vorsprünge aufgeteilt sein.The protrusions preferably comprise at least one first protrusion externally abutting a central portion of the arch and a second protrusion inwardly abutting both ends of the bend at the transition between the bend and the adjoining parallel tube sections. This second projection can also be divided into two individual projections which abut one end of the arc at a time.
Um die Rohrheizung an dem Träger zu fixieren, bildet der erste Vorsprung vorzugsweise einen den Bogen umgreifenden Haken.In order to fix the pipe heater to the carrier, the first projection preferably forms a hook that encompasses the bow.
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 einen schematischen Schnitt durch den oberen Bereich eines No-Frost-1 shows a schematic section through the upper region of a no-frost
Kältegeräts gemäß der vorliegenden Erfindung; Fig. 2 eine Ansicht der Rohrheizung gemäß einer ersten Ausgestaltung derRefrigerating appliance according to the present invention; Fig. 2 is a view of the pipe heater according to a first embodiment of
Erfindung;Invention;
Fig. 3 eine perspektivische Ansicht der Rohrheizung gemäß einer zweitenFig. 3 is a perspective view of the pipe heater according to a second
Ausgestaltung;design;
Fig. 4 die Rohrheizung aus Fig. 2 montiert an einem Träger;FIG. 4 shows the tube heater from FIG. 2 mounted on a carrier; FIG.
Fig. 5 eine Detailansicht, die die Montage der Rohrheizung gemäß einer abgewandelten Ausgestaltung veranschaulicht; undFig. 5 is a detail view illustrating the installation of the pipe heater according to a modified embodiment; and
Fig. 6 einen Schnitt des Details aus Fig. 5.6 shows a section of the detail from FIG. 5.
Fig. 1 zeigt einen schematischen Schnitt durch den oberen Bereich eines erfindungsgemäßen No-Frost-Kältegeräts. Das Kältegerät hat einen Korpus 1 und eine Tür 2, die jeweils in herkömmlicher Weise als mit einer wärmeisolierenden Schaumstoffschicht 3 ausgefüllte Hohlkörper realisiert sind. Das Innere des Korpus 1 ist durch eine ebenfalls wärmeisolierende Trennwand 4 unterteilt in eine Verdampferkammer 5 und ein Kühlfach 6. Die Trennwand 4 ist durch den Boden eines Trägers 7 für eine Verdampferbaugruppe gebildet, auf dem ein an sich bekannter Lamellenverdampfer 8 montiert ist. Der Träger 7 ist mit Abstand zur Decke des Korpus 1 montiert und grenzt zusammen mit den Seitenwänden des Korpus 1 die Verdampferkammer 5 ab. Der Träger 7 hat einen Lufteinlassdurchgang 9 an seiner der Tür 2 zugewandten Seite und einen Luftauslassdurchgang 10 an seiner der Rückwand des Korpus 1 zugewandten Seite 16. In einem rückwärtigen Bereich der Verdampferkammer 5, hinter dem Luftauslassdurchgang 10 des Trägers 7, ist ein Ventilator 1 1 mit Schaufelrad 12 und Motor 13 untergebracht, der Luft aus der Verdampferkammer 5 abzieht und in einen Luftkanal 14 drückt.Fig. 1 shows a schematic section through the upper portion of a no-frost refrigeration device according to the invention. The refrigerator has a body 1 and a door 2, which are each realized in a conventional manner as filled with a heat-insulating foam layer 3 hollow body. The interior of the body 1 is divided by a likewise heat-insulating partition 4 into an evaporator chamber 5 and a cooling compartment 6. The partition 4 is formed by the bottom of a support 7 for an evaporator assembly on which a known finned evaporator 8 is mounted. The carrier 7 is mounted at a distance from the ceiling of the body 1 and defines together with the side walls of the body 1, the evaporator chamber 5 from. The carrier 7 has an air inlet passage 9 on its side facing the door 2 and an air outlet passage 10 on its side facing the rear wall of the body 1 in a rear region of the evaporator chamber 5, behind the air outlet passage 10 of the carrier 7, a fan 1 1 housed with paddle wheel 12 and motor 13, the air from the evaporator chamber 5 subtracts and presses in an air duct 14.
In dem exemplarischen Schnitt der Fig. 1 erstreckt sich der Luftkanal 14 lediglich durch die Trennwand 4 und mündet in das unmittelbar darunter liegende Kühlfach 6. Der Luftkanal 14 könnte alternativ auch innerhalb der Rückwand des Korpus 1 geführt sein und mit einer Mehrzahl von Durchgangsöffnungen zum Kühlfach 6 versehen sein, über die sich die in dem Luftkanal fließende Kaltluft über die Höhe des Kühlfachs 6 - A -In the exemplary section of FIG. 1, the air duct 14 extends only through the partition wall 4 and opens into the immediately below cooling compartment 6. The air duct 14 could alternatively be guided within the rear wall of the body 1 and with a plurality of through holes to the cooling compartment Be provided over the 6 flowing in the air duct cold air over the height of the cooling compartment. 6 - A -
gleichmäßig verteilt. Des weiteren könnte in dem Luftkanal 14 ein Ventil vorgesehen sein, welches den Kaltluftstrom über verschiedene Zweige des Luftkanals wahlweise einem von mehreren Fächern des Kältegeräts, beispielsweise dem Kühlfach 6 und einem nicht dargestellten Gefrierfach, zuleitet.equally distributed. Furthermore, a valve could be provided in the air duct 14, which selectively feeds the cold air flow via various branches of the air duct to one of a plurality of compartments of the refrigeration appliance, for example the refrigerated compartment 6 and a freezer compartment, not shown.
Fig. 2 zeigt eine perspektivische Ansicht einer auf dem Träger 7 unterhalb des Verdampfers 8 angebrachten Rohrheizung 20. Die Rohrheizung 20 umfasst eine Vielzahl von zueinander parallelen geradlinigen Rohrabschnitten 21 a, b, c, ..., von denen jeder mit Ausnahme des hinteren linken Rohrabschnitts 21 a mit einem unmittelbar benachbarten Abschnitt 21 durch einen Rohrbogen 22 verbunden ist. Der Rohrabschnitt 21 a ist mit dem vorderen, rechten geradlinigen Abschnitt 21 r durch einen langgestreckten Rohrbogen 23 verbunden, der sich über die gesamte Breite der Rohrheizung 20 erstreckt. Anfang und Ende der Rohrheizung 20 befinden sich so an zueinander benachbarten parallelen Abschnitten 21 a, b, so dass an diese anschließende Versorgungsdrähte 24 gemeinsam auf kürzestem Weg aus der Verdampferkammer 5 herausgeführt werden können. Ein punktierter Quader oberhalb der Rohrheizung 20 symbolisiert den Verdampfer 8. Der Verdampfer 8 kann beispielsweise ein an sich bekannter und hier nicht im Detail dargestellter Lamellenverdampfer sein, der mit zu den Rohrabschnitten 21 parallelen oder dazu senkrechten Lamellen angeordnet ist.2 shows a perspective view of a pipe heater 20 mounted on the carrier 7 below the evaporator 8. The pipe heater 20 comprises a plurality of mutually parallel rectilinear pipe sections 21a, b, c, ..., each of which except the rear left Tube section 21 a is connected to an immediately adjacent section 21 through a pipe bend 22. The pipe section 21 a is connected to the front, right rectilinear portion 21 r by an elongated pipe bend 23 which extends over the entire width of the pipe heater 20. The beginning and end of the pipe heater 20 are so at adjacent parallel portions 21 a, b, so that can be led out to these subsequent supply wires 24 together on the shortest route from the evaporator chamber 5. A dotted cuboid above the pipe heater 20 symbolizes the evaporator 8. The evaporator 8 may be, for example, a known and not shown here in detail finned evaporator, which is arranged parallel to the pipe sections 21 or perpendicular thereto slats.
Fig. 3 zeigt eine abgewandelte Ausgestaltung der Rohrheizung 20, bei welcher der langgestreckte Rohrbogen 23 aus der Ebene der Rohrabschnitte 21 herausgeführt ist und sich vor der der Luftauslassöffnung 10 zugewandten Seite des Verdampfers 8 erstreckt.3 shows a modified embodiment of the pipe heater 20, in which the elongated pipe bend 23 is led out of the plane of the pipe sections 21 and extends in front of the side of the evaporator 8 facing the air outlet opening 10.
Fig. 4 zeigt in einer perspektivischen Ansicht die Rohrheizung 20 aus Fig. 2 montiert auf dem Träger 7. Die Rohrabschnitte 21 liegen auf einer Bodenplatte 25 des Trägers 7 auf, die von einer die Lufteinlassöffnung 9 umgebenden Vorderwand 26 zu einer Kante 27 hin leicht abschüssig ist. Hinter der Kante 27 folgt ein starker abschüssiger Abschnitt 28 und eine Rinne 29, in der sich - da sie den tiefsten Bereich der Bodenplatte 25 darstellt - vom Verdampfer 8 ablaufendes Tauwasser sammelt und durch eine Öffnung 30 im Boden der Rinne zu einem an sich bekannten und hier nicht beschriebenen Verdunster abfließt. Jeder der der Rückseite 16 des Trägers 7 zugewandten Rohrbögen 22 ist an der Bodenplatte 25 fixiert durch eine Gruppe von drei Zapfen 31 , von denen einer an der Außenseite des Bogens 22 dessen Scheitelpunkt berührt und die anderen beiden an der Innenseite des Bogens jeweils im Übergangsbereich zu den geradlinigen Rohrabschnitten 21 anliegen. Durch die drei Zapfen 31 ist die Position jedes Rohrbogens 22 in der Horizontalen exakt festgelegt.FIG. 4 shows, in a perspective view, the pipe heater 20 of FIG. 2 mounted on the support 7. The pipe sections 21 rest on a base plate 25 of the support 7, which slopes slightly from a front wall 26 surrounding the air inlet opening 9 to an edge 27 is. Behind the edge 27 follows a strong sloping portion 28 and a groove 29, in which - as it represents the deepest region of the bottom plate 25 - accumulating from the evaporator 8 expired condensation and through an opening 30 in the bottom of the channel to a known and evaporator not described here drains off. Each of the rear side 16 of the support 7 facing pipe bends 22 is fixed to the bottom plate 25 by a group of three pins 31, one of which touches the vertex on the outside of the sheet 22 and the other two at the Inside the bow in each case in the transition region to the rectilinear pipe sections 21 abut. By the three pins 31, the position of each pipe bend 22 is set exactly in the horizontal.
Vier von der Bodenplatte 25 abstehende gegabelte Trägerelemente 32 sind vorgesehen, um auf ihnen den Verdampfer 8 zu befestigen, indem jeweils ein Kältemittelrohr des Verdampfers in die Gabel der Trägerelemente 32 eingesteckt und in einer Aufweitung der Gabel verrastet wird.Four bifurcated support members 32 projecting from the bottom plate 25 are provided for securing the evaporator 8 thereon by inserting a refrigerant tube of the evaporator into the fork of the support members 32 and latching them in a widening of the fork.
Fig. 5 zeigt eine Detailansicht des Bodens des Trägers 7 in der Umgebung der Kante 27 gemäß einer gegenüber Fig. 4 geringfügig abgewandelten Ausgestaltung, wobei bei dieser Ausgestaltung die zwei die Innenseite des Bogens 22 berührenden Zapfen 31 durch einen breiten, nach oben verjüngten Vorsprung 33 ersetzt sind und der den Scheitel des Bogens 22 berührenden Zapfen 31 eine besser in dem Schnitt der Fig. 6 zu erkennende Aussparung 34 aufweist in die der Bogen 22 eingreift. Die Rohrheizung 20 wird montiert, indem zunächst ihre der Rückseite benachbarten Rohrbögen 22 in vertikaler Orientierung, wie in Fig. 5 und 6 jeweils gestrichelt dargestellt, auf den Abschnitt 28 der Bodenplatte 25 aufgesetzt werden. Dabei ist es nicht wichtig, dass die Bögen 22 jeweils exakt symmetrisch in Bezug auf den Zapfen 31 und den Vorsprung 33 platziert werden; es genügt, wenn die an den Bogen 22 anschließenden geradlinigen Rohrabschnitte 21 auf verschiedenen Seiten der Spitze des Vorsprungs 33 liegen. Wenn die Rohrheizung 20 gegen die Bodenplatte 25 in die durchgezogen dargestellte Stellung geschwenkt wird, zentriert sich der Bogen an dem Vorsprung 33 selbsttätig, so dass sein Scheitel exakt in der Aussparung 34 des Zapfens 31 zu liegen kommt.5 shows a detailed view of the bottom of the carrier 7 in the vicinity of the edge 27 according to a slightly modified embodiment compared to FIG. 4, wherein in this embodiment the two pins 31 contacting the inside of the sheet 22 have a wide, upwardly tapered projection 33 are replaced and the top of the sheet 22 contacting pin 31 has a better in the section of Fig. 6 to be recognized recess 34 into which the sheet 22 engages. The pipe heater 20 is mounted by first of its rear side adjacent pipe bends 22 in a vertical orientation, as shown in phantom in FIGS. 5 and 6, are placed on the portion 28 of the bottom plate 25. It is not important that the sheets 22 are placed exactly symmetrical with respect to the pin 31 and the projection 33; it is sufficient if the subsequent to the sheet 22 rectilinear pipe sections 21 are located on different sides of the tip of the projection 33. When the pipe heater 20 is pivoted against the bottom plate 25 in the solid shown position, the arc centered on the projection 33 automatically, so that its vertex comes exactly to rest in the recess 34 of the pin 31.
Durch die Aussparung 34 fungiert der Zapfen 31 als ein Haken, der den Rohrbogen 22 daran hindert, sich von dem Abschnitt 28 abzuheben. Der breite Vorsprung 33 verhindert ein Verrutschen des Bogens nach links in Fig. 6, so dass der Rohrbogen aus der Aussparung 33 nicht ausrücken kann und die Rohrheizung 20 somit fest verriegelt ist.Through the recess 34, the pin 31 acts as a hook, which prevents the pipe bend 22 from being lifted from the portion 28. The wide projection 33 prevents slippage of the sheet to the left in Fig. 6, so that the pipe bend from the recess 33 can not disengage and the pipe heater 20 is thus firmly locked.
Die vorderen, der Lufteinlassöffnung 9 zugewandten Rohrbögen 22 können durch Zapfen 31 und Vorsprünge 33 ähnlich den in Fig. 5 und 6 gezeigten an der Bodenplatte 25 verriegelt sein, wobei allerdings bei diesen letzteren Vorsprüngen eine Aussparung, in die der Scheitel des Rohrbogens eingreift, sehr flach sein muss, um ein Andrücken der Rohrbögen 22' zwischen die Zapfen und Vorsprünge in horizontaler Orientierung zu ermöglichen.The front, the air inlet opening 9 facing pipe bends 22 may be by pins 31 and projections 33 similar to those shown in Fig. 5 and 6 are locked to the bottom plate 25, however, in these latter projections a recess in which engages the apex of the pipe bend, very must be flat to a pressing of the To allow pipe bends 22 'between the pins and projections in a horizontal orientation.
Infolge der unterschiedlichen Steigungen der Bodenplatte 25 vor und hinter der Kante 27 steht die fertig montierte Rohrheizung 20 unter einer Biegespannung, die ein Klappern der Rohrheizung infolge von im Betrieb des Kältegeräts auftretenden Erschütterungen verhindert. Due to the different slopes of the bottom plate 25 in front of and behind the edge 27, the fully assembled pipe heater 20 is under a bending stress, which prevents rattling of the pipe heater due to vibrations occurring during operation of the refrigerator.

Claims

Patentansprüche claims
1 . No-Frost-Kältegerät mit einem Verdampfer (8), einer Rohrheizung (20) und einem den Verdampfer (20) und die Rohrheizung (8) tragenden Träger (7), wobei die Rohrheizung (20) eine Vielzahl von untereinander einteilig zusammenhängenden parallelen Rohrabschnitten (21 ; 21 a-21 r) umfasst, dadurch gekennzeichnet, dass1 . No-frost refrigeration device with an evaporator (8), a tube heater (20) and a carrier (7) supporting the evaporator (20) and the tube heater (8), the tube heater (20) having a plurality of parallel tubular sections connected in one piece (21; 21 a-21 r), characterized in that
Anfang und Ende der Rohrheizung (20) sich an zwei unmittelbar benachbarten parallelen Rohrabschnitten (21 a, 21 b) befinden.Beginning and end of the pipe heater (20) are located on two immediately adjacent parallel pipe sections (21 a, 21 b).
2. No-Frost-Kältegerät nach Anspruch 1 , dadurch gekennzeichnet, dass zwei parallele Rohrabschnitte (21 a, 21 r) an entgegengesetzten Seiten der Rohrheizung durch einen Rohrbogen (23) unmittelbar verbunden sind.2. no-frost refrigerator according to claim 1, characterized in that two parallel pipe sections (21 a, 21 r) on opposite sides of the pipe heating by a pipe bend (23) are directly connected.
3. No-Frost-Kältegerät nach Anspruch 2, dadurch gekennzeichnet, dass der Rohrbogen (23) in derselben Ebene wie die parallelen Rohrabschnitte (21 ; 21 a-21 r) verläuft.3. No-frost refrigerator according to claim 2, characterized in that the pipe bend (23) in the same plane as the parallel pipe sections (21, 21 a-21 r) runs.
4. No-Frost-Kältegerät nach Anspruch 2, dadurch gekennzeichnet, dass der Rohrbogen (23) außerhalb der Ebene der parallelen Rohrabschnitte (21 ; 21 a-21 r) verläuft.4. No-frost refrigerator according to claim 2, characterized in that the pipe bend (23) outside the plane of the parallel pipe sections (21, 21 a-21 r) runs.
5. No-Frost-Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Rohrheizung (20) in Höhe von die parallelen Rohrabschnitte (21 ; 21 a-21 r) verbindenden Rohrbögen (22) an Vorsprüngen (31 , 32) des Gehäuses (7) fixiert ist.5. No-frost refrigerator according to one of the preceding claims, characterized in that the pipe heater (20) in the amount of the parallel pipe sections (21, 21 a-21 r) connecting pipe bends (22) of projections (31, 32) of the Housing (7) is fixed.
6. No-Frost-Kältegerät nach Anspruch 5, dadurch gekennzeichnet, dass die Vorsprünge (31 , 32) wenigstens einen ersten Vorsprung (31 ), der außenseitig an einem Mitte I abschnitt des Bogens (22) anliegt, und einen zweiten Vorsprung (31 , 32), der innenseitig an den beiden Enden des Bogens (22) anliegt, umfassen.6. no-frost refrigerating appliance according to claim 5, characterized in that the projections (31, 32) at least a first projection (31), the outside of a central portion I of the sheet (22) is present, and a second projection (31 , 32), which rests on the inside at the two ends of the sheet (22), comprise.
7. No-Frost-Kältegerät nach Anspruch 6, dadurch gekennzeichnet, dass der erste Vorsprung (31 ) einen den Bogen (22) umgreifenden Haken bildet. 7. no-frost refrigerator according to claim 6, characterized in that the first projection (31) forms a bow (22) encompassing hook.
PCT/EP2006/066167 2005-09-12 2006-09-08 No-frost cooling device WO2007031470A2 (en)

Priority Applications (2)

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EP06793352A EP1929218A2 (en) 2005-09-12 2006-09-08 No-frost cooling device
US11/991,901 US20090133427A1 (en) 2005-09-12 2006-09-08 No-Frost Cooling Device

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DE202005014373.1 2005-09-12
DE202005014373U DE202005014373U1 (en) 2005-09-12 2005-09-12 No-frost refrigerating appliance

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WO2007031470A3 WO2007031470A3 (en) 2007-05-03

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EP (1) EP1929218A2 (en)
CN (1) CN101263352A (en)
DE (1) DE202005014373U1 (en)
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CN101749910B (en) * 2008-12-08 2012-02-08 博西华家用电器有限公司 Refrigerator
DE102009052048A1 (en) * 2009-11-05 2011-05-12 Liebherr-Hausgeräte Ochsenhausen GmbH Evaporator for refrigerating and/or freezing device, has defrost heater installed at evaporator by retainer, which is connected with evaporator and/or defrost heater by toolless connection i.e. plug connection
KR101103031B1 (en) * 2010-07-13 2012-01-05 강연균 Storage refrigerator for chemical reagents
DE102011006248A1 (en) 2011-03-28 2012-10-04 BSH Bosch und Siemens Hausgeräte GmbH Refrigeration device with a heater
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CN103353203A (en) * 2013-05-31 2013-10-16 镇江天信电器有限公司 Improved mounting structure of defrosting heater
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WO2007031470A3 (en) 2007-05-03
RU2411429C2 (en) 2011-02-10
US20090133427A1 (en) 2009-05-28
DE202005014373U1 (en) 2006-01-05
RU2008109817A (en) 2009-10-20
CN101263352A (en) 2008-09-10
EP1929218A2 (en) 2008-06-11

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