EP0868638B1 - Refrigerating apparatus, in particular domestic refrigerating apparatus - Google Patents

Refrigerating apparatus, in particular domestic refrigerating apparatus Download PDF

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Publication number
EP0868638B1
EP0868638B1 EP96934756A EP96934756A EP0868638B1 EP 0868638 B1 EP0868638 B1 EP 0868638B1 EP 96934756 A EP96934756 A EP 96934756A EP 96934756 A EP96934756 A EP 96934756A EP 0868638 B1 EP0868638 B1 EP 0868638B1
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EP
European Patent Office
Prior art keywords
sieve
cooling appliance
appliance according
surround
receiving sleeve
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.)
Expired - Lifetime
Application number
EP96934756A
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German (de)
French (fr)
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EP0868638A1 (en
Inventor
Alexander Rupp
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Publication of EP0868638A1 publication Critical patent/EP0868638A1/en
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Classifications

    • 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
    • F25B43/00Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/003Filters
    • 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
    • F25B5/00Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • 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
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2400/00General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/04Refrigerators with a horizontal mullion

Definitions

  • the invention relates to a refrigerator, in particular a household refrigerator, such as a refrigerator or Freezers, with at least one refrigeration cycle, within which one Dryer cartridge is arranged, in the cartridge housing one made of sintered materials formed, through which refrigerant flows, which is arranged on its Peripheral edges are surrounded by a frame-like border with which the sieve is fixed in the flow cross section of the dryer housing.
  • a household refrigerator such as a refrigerator or Freezers
  • the wire screens have been changed to screens made of sintered materials, to replace so-called sintered sieves. These are within the range of refrigerant flowed cross section of the dryer housing through at least approximately Sieving thickness corresponding beads formed in the housing wall without cutting fixed.
  • special attention should be paid to the fact that the sieve with a certain installation air in the flow cross section of the dryer housing is inserted and that the introduction of the beads is controlled so that the sintered sieve is not damaged during its fixing process.
  • To meet these demands is both a complicated and therefore costly assembly - as well Fixing tool necessary.
  • a refrigerator according to the features of the preamble of Claim 1 known from EP-A-0 594 431. That in this publication
  • the refrigeration device disclosed includes a dryer cartridge in its refrigeration cycle a housing in which a filter is held.
  • a cup-shaped holding element provided, in the cup space of the filter body is inserted.
  • the holder of the filter inside the cup-like holder is on this integrally formed tab-like projections, which after the insertion of the Filter body in the receiving space of the cup-like receptacle against the filter body are bent.
  • this type of mounting means that the Resiliently spring back protrusions after bending, which ensures a liquid-tight contact of the filter on the bottom of the cup-like receptacle is not guaranteed and therefore the filter effect due to the non-installation created by-pass is inadequate.
  • a bracket brings for a filter body that a significant part due to the bending of the projections the effective filter area is covered and therefore cannot be flowed through. The covered part of the filter surface is therefore ineffective.
  • By covering certain Filter sections of the active filter area there is a risk that the around the accumulated cover area reduces the active filter area prematurely Clogged dirt particles and thus the dryer and thus the entire refrigeration cycle becomes inoperable prematurely.
  • the partial flat coverage of the Filter body the danger in it, due to the covers and the resulting resulting reduced active filter area in the refrigerant circuit of a cooling device an undesirable back pressure arises.
  • the invention is based on the object of having a sieve formed from sintered materials to improve simple constructive measures in such a way that the disadvantages of the State of the art in its assembly and fixations in the dryer housing are avoided.
  • the inventive sintered sieve does not experience any of this Impairment caused by flat coverings available standing active filter area.
  • the enclosure as a provided with the stop collar Receiving sleeve is formed.
  • Such an enclosure means that the sieve is prone to brittle fracture at its edges can be provided with a bezel particularly easily and quickly without applying force, in which it already largely through the stop collar without additional measures is precisely positioned and thus functionally reliable.
  • the holder for the sieve is particularly secure if after a next one preferred embodiment of the object of the invention is provided, which Holder for the sieve in the receiving sleeve through the retaining collar arranged thereon is effected.
  • the retaining collar for holding the screen with a the holding sleeve connected to the holding sleeve is produced.
  • the manufacture of an enclosure for mass production is particularly inexpensive, if provided according to an alternative embodiment of the object of the invention is that the border for the sieve is embedded by embedding its contour edges in injection or materials that can be processed by casting.
  • a frame for a sieve is particularly easy to produce, if after another preferred embodiment of the object of the invention is provided that the Sieve has a circular cross-section, on the contour of the border encloses form-fitting and force-fitting.
  • a particularly high filter effect through the sieve is achieved if after a last one preferred embodiment of the object of the invention is provided that the Sieve is enclosed in a liquid-tight manner on its peripheral edges by the border.
  • a household refrigerator 10 is shown, the heat insulating Housing 11 with two attached and separately opening doors 12 and 13 is provided.
  • the doors 12 and 13 are not thermally separated specified storage compartments of different temperatures accessible, their Fan temperature is maintained with the help of a refrigeration system 14.
  • the refrigeration system 14 has two Refrigerant circuits I and II, which are controlled by an electrically controllable 3/2-way solenoid valve 15 can be acted upon with refrigerant.
  • the electric controllable solenoid valve 15 is one at each of its outputs Refrigerant lines, not specified, with the solenoid valve 15 downstream flow restrictor 16 or 17, both in the form of a spirally wound capillary tube are trained.
  • Each of the throttle devices 16 and 17 is on the output side with an injection point (not shown in detail) of a refrigerant evaporator 18 or 19 fluidically connected, which in parallel to each other lie.
  • the outputs of the two evaporators 18 and 19 are through a Refrigerant line 20 merged, and to a common suction line 21 connected, which is connected to the suction side of a refrigerant compressor 22 is fluidly connected. This is on the output side to one Condenser 23 connected, which in turn with a Drying device in the form of a dryer cartridge 24 is connected.
  • a Refrigerant line 20 merged, and to a common suction line 21 connected, which is connected to the suction side of a refrigerant compressor 22 is fluidly connected.
  • This is on the output side to one Condenser 23 connected, which in turn with a Drying device in the form of a dryer cartridge 24 is connected.
  • the Dryer cartridge 24, which is connected on the output side to the solenoid valve 15 is having a substantially tubular housing circular cylindrical cross-section, the tube wall 25 on its two End faces through non-cutting shaping, for example in the form of a Hammering down is formed into a connecting piece 26 or 27 Adjacent to the connecting piece 27 is an opposite of that indicated by the arrow symbolically indicated direction of refrigerant flow through the dryer cartridge 24 in the tube space 28 enclosed by its tube wall 25 as Dirt filter serving screen body 30 is provided, which on the inner tube surface the dryer cartridge 24 fluid-tightly fixed is.
  • the screen body 30 comprises a sintered bronze, such as Sica grade, B100 formed sieve 31, which on its peripheral edges of a surrounds these contours following the contour 32, which the Sieve 31 encloses and fixed like a frame.
  • the bezel 32 is in the present Embodiment generated by a receiving sleeve 33, which from a one-piece, plastically deformable metallic circular hollow cylinder is formed, which with its inner surface surrounds the surface of the sieve and which on one of its faces has a pre-shaped bend its lateral surface produced stop collar 34 towards its center axis having. This is essentially force-free in the hollow cylinder inserted sieve 31 with one of its end faces for fixing its correct mounting position.
  • Fixing the sieve 31 within the Pipe space of the receiving sleeve 33 is the projecting over the height of the screen Non-cutting tube wall deformed such that a retaining collar 35 is formed which is together with the stop collar 34 and the pipe jacket wall of the receiving sleeve form the border 32, which the sieve 31 both form and non-positively engages so that it also encloses liquid-tight.
  • the border 32 are suitable in addition to plastically deformable metals also high temperature resistant, plastically deformable plastics as well as cast and sprayable metals.
  • the sieve 41 is of two parts assembled bezel 42, frame-like positively and non-positively enclosed.
  • the border 42 which is liquid-tight on the inner tube wall Dryer cartridge is held by means of a frictional connection, has a first, in Form of a circular hollow cylinder formed receiving sleeve 43, which like the receiving sleeve 33 on one of its end faces with one to its center axis Executed bend 44 is provided, the inner surface as a contact surface serves for the screen body 41.
  • Holding sleeve 45 is provided, which like the receiving sleeve 43 in the manner of a Circular hollow cylinder is formed and in which the tube wall one to her Has center axis directed bend 46.
  • the holding sleeve 45 is dimensioned in terms of their diameter such that they fit into the receiving sleeve 43 is insertable and in the inserted state with its outer lateral surface abuts the inner tubular surface of the receiving sleeve 43.
  • the holding sleeve 45 within the Receiving sleeve 43 is arranged, wherein the outer surface of the holding sleeve 45 arranged bend serves as a support surface for the sieve 41.
  • the receiving sleeve 43 and the holding sleeve 45 are the receiving sleeve 43 and the holding sleeve 45 in the area their interacting tubular jacket wall with each other form and / or non-positively, for example by welding or by crimping, by connecting the two sleeves 43 and 45 which the sieve 41 at its contour enclosing form and force fit 42 is generated, which surrounds the sieve 41 in a liquid-tight manner.
  • Border 32 are for border 42 in addition to plastically deformable metals, plastically deformable, heat-resistant plastics also conceivable metals, which have a lower plastic deformability, but are easily machinable.

Description

Die Erfindung betrifft ein Kältegerät, insbesondere ein Haushaltskältegerät, wie Kühl- oder Gefriergeräte, mit wenigstens einem Kältekreislauf, innerhalb welchem eine Trocknerpatrone angeordnet ist, in deren Patronengehäuse ein aus Sinterwerkstoffen gebildetes, von Kältemittel durchflossenes Sieb angeordnet ist, welches an seinen Umfangsrändern von einer rahmenartigen Einfassung umgeben ist, mit welcher das Sieb im durchflossenen Querschnitt des Trocknergehäuses fixiert ist.The invention relates to a refrigerator, in particular a household refrigerator, such as a refrigerator or Freezers, with at least one refrigeration cycle, within which one Dryer cartridge is arranged, in the cartridge housing one made of sintered materials formed, through which refrigerant flows, which is arranged on its Peripheral edges are surrounded by a frame-like border with which the sieve is fixed in the flow cross section of the dryer housing.

Bei Haushaltskältegeräten ist es der Stand der Technik, in deren Kältekreisläufen Trocknerpatronen vorzusehen, welche in Reihenschaltung nach dem Verflüssiger angeordnet sind und welche mit einem Trockenmittel befüllt sind, um Wasseranteile aus dem im Kältekreislauf zirkulierenden Kältemittel absorbieren. Um zu vermeiden, dass Verunreinigungen aus dem Trockenmittel bzw. Rückstände aus der mechanischen Bearbeitung der Trocknerpatrone in den Kältemittelkreislauf gelangen und dort womöglich den Trockner einer als expansionsdienenden, vor einem Verdampfer angeordneten Drosselstrecke verlegen, ist innerhalb der Trocknerpatrone in Richtung des von einem Verdichter angetriebenen Kältemittels ein Sieb vorgesehen, welches in überwiegenden Fällen als im Trocknerkörper festgesetztes Drahtsieb ausgebildet ist, das in Einzelfällen ein Eindringen von Verunreinigungen in den Kältekreislauf nicht verhindern konnte. Um die Siebwirkung bei in Trocknerpatronen zum Einsatz kommenden Sieben zu verbessern, ist man dazu übergegangen, die Drahtsiebe durch aus Sinterwerkstoffe gebildete Siebe, sogenannte Sintersiebe zu ersetzen. Diese werden innerhalb des von Kältemittel durchflossenen Querschnitts des Trocknergehäuses durch zumindest annähernd ihrer Siebstärke entsprechenden, in die Gehäusewandung spanlos eingeformten Sicken festgesetzt. Bei der Fixierung und Montage des Sintersiebes muss aufgrund deren Sprödigkeit besonderes Augenmerk darauf gelegt werden, dass das Sieb mit einer gewissen Montageluft in den durchflossenen Querschnitt des Trocknergehäuses eingefügt wird und dass das Einbringen der Sicken so gesteuert ist, dass das Sintersieb während seines Fixiervorganges nicht beschädigt wird. Um diese Forderungen zu erfüllen, ist sowohl ein kompliziertes und somit kostenintensives Montage - als auch Fixierwerkzeug notwendig. In household refrigeration appliances, it is the state of the art in their refrigeration circuits To provide dryer cartridges, which are connected in series after the condenser are arranged and which are filled with a desiccant to remove water absorb the refrigerant circulating in the refrigeration cycle. To avoid that Contamination from the desiccant or residues from the mechanical Machining the dryer cartridge into the refrigerant circuit and possibly there the dryer one as an expansion serving, arranged in front of an evaporator Throttle section is inside the dryer cartridge in the direction of one Compressor-driven refrigerant provided a strainer, which is predominant Cases is designed as a wire screen fixed in the dryer body, which in individual cases could not prevent contaminants from entering the refrigeration cycle. Around improve the sieving effect of sieves used in dryer cartridges, the wire screens have been changed to screens made of sintered materials, to replace so-called sintered sieves. These are within the range of refrigerant flowed cross section of the dryer housing through at least approximately Sieving thickness corresponding beads formed in the housing wall without cutting fixed. When fixing and assembling the sintered sieve, due to this Brittleness special attention should be paid to the fact that the sieve with a certain installation air in the flow cross section of the dryer housing is inserted and that the introduction of the beads is controlled so that the sintered sieve is not damaged during its fixing process. To meet these demands is both a complicated and therefore costly assembly - as well Fixing tool necessary.

Darüber hinaus ist ein Kältegerät gemäß den Merkmalen des Oberbegriffs des Anspruches 1 aus der EP-A-0 594 431 bekannt. Das in dieser Druckschrift offenbarte Kältegerät beinhaltet in seinem Kältekreislauf eine Trocknerpatrone mit einem Gehäuse, in dem ein Filter gehaltert ist. Zur Halterung dieses Filters ist ein becherartig geformtes Halteelement vorgesehen, in dessen Becherraum der Filterkörper eingelegt ist. Die Halterung des Filters innerhalb der becherartigen Aufnahme ist durch an dieser angeformte lappenartige Vorsprünge bewirkt, welche nach dem Einsetzen des Filterkörpers in den Aufnahmeraum der becherartigen Aufnahme gegen den Filterkörper umgebogen sind. Diese Art der Halterung hat prinzipbedingt zur Folge, dass die Vorsprünge nach dem Biegevorgang um einen gewissen Betrag elastisch zurückfedern, wodurch eine flüssigkeitsdichte Anlage des Filters am Boden der becherartigen Aufnahme nicht gewährleistet ist und somit die Filterwirkung aufgrund des durch die Nichtanlage geschaffenen By-Passes unzulänglich ist. Darüber hinaus bringt eine derartige Halterung für einen Filterkörper mit sich, dass durch den Umbug der Vorsprünge ein erheblicher Teil der an sich wirksamen Filterfläche abgedeckt und damit nicht durchströmbar ist. Der abgedeckte Teil der Filterfläche ist folglich unwirksam. Durch die Abdeckung bestimmter Filterabschnitte der an sich aktiven Filterfläche, ergibt sich die Gefahr, dass sich die um die aufsummierte Abdeckfläche reduzierte aktive Filterfläche verfrüht mit Schmutzpartikeln zusetzt und somit der Trockner und damit der gesamte Kältekreislauf vorzeitig funktionsuntüchtig wird. Weiterhin birgt die partielle flächige Abdeckung des Filterkörpers die Gefahr in sich, dass bedingt durch die Abdeckungen und die daraus resultierende verminderte aktive Filterfläche im Kältemittelkreislauf eines Kühlgerätes ein unerwünschter Staudruck entsteht.In addition, a refrigerator according to the features of the preamble of Claim 1 known from EP-A-0 594 431. That in this publication The refrigeration device disclosed includes a dryer cartridge in its refrigeration cycle a housing in which a filter is held. To hold this filter is a cup-shaped holding element provided, in the cup space of the filter body is inserted. The holder of the filter inside the cup-like holder is on this integrally formed tab-like projections, which after the insertion of the Filter body in the receiving space of the cup-like receptacle against the filter body are bent. In principle, this type of mounting means that the Resiliently spring back protrusions after bending, which ensures a liquid-tight contact of the filter on the bottom of the cup-like receptacle is not guaranteed and therefore the filter effect due to the non-installation created by-pass is inadequate. In addition, such a bracket brings for a filter body that a significant part due to the bending of the projections the effective filter area is covered and therefore cannot be flowed through. The covered part of the filter surface is therefore ineffective. By covering certain Filter sections of the active filter area, there is a risk that the around the accumulated cover area reduces the active filter area prematurely Clogged dirt particles and thus the dryer and thus the entire refrigeration cycle becomes inoperable prematurely. Furthermore, the partial flat coverage of the Filter body the danger in it, due to the covers and the resulting resulting reduced active filter area in the refrigerant circuit of a cooling device an undesirable back pressure arises.

Der Erfindung liegt die Aufgabe zugrunde, ein aus Sinterwerkstoffen gebildetes Sieb mit einfachen konstruktiven Maßnahmen derart zu verbessern, dass die Nachteile des Standes der Technik bei dessen Montage und Fixierungen im Trocknergehäuse vermieden sind.The invention is based on the object of having a sieve formed from sintered materials to improve simple constructive measures in such a way that the disadvantages of the State of the art in its assembly and fixations in the dryer housing are avoided.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, dass die Einfassung einen Anschlagbund und einen Haltebund aufweist, zwischen welchen das Sieb form- und kraftschlüssig gehalten ist. This object is achieved according to the invention in that the border one Stop collar and a retaining collar, between which the sieve form and is held non-positively.

Durch die erfindungsgemäße Halterung des Sintersiebes erfährt dieses keinerlei Beeinträchtigungen, hervorgerufen durch flächige Abdeckungen seiner zur Verfügung stehenden aktiven Filterfläche.The inventive sintered sieve does not experience any of this Impairment caused by flat coverings available standing active filter area.

Darüber hinaus ist durch die erfindungsgemäße Ausbildung des Siebes dieses einerseits an den sprödbruchgefährdeten Randbereichen vor gegebenenfalls die Siebwirkung beeinträchtigenden Beschädigungen geschützt und andererseits zugleich durch eine kraftschlüssige Verbindung zwischen der Einfassung und der den durchflossenen Querschnitt des Trocknergehäuses begrenzenden Rohrwandung im Trocknergehäuse mit geringem werkzeugtechnischen Aufwand durch einfaches Einpressen fixierbar, so dass spezielle Sonderwerkzeuge einerseits zur Handhabung des Sintersiebes und andererseits zu dessen Fixierung im Trocknergehäuse vermieden sind. Darüber hinaus ist durch die das Sieb in seinem Umfang schützend umgebende Einfassung eine durch dessen kraftschlüssige Fixierung erzielte, unterschiedlichen Toleranzlagen des durchflossenen Querschnitts des Trocknergehäuses gerecht werdende Montagemöglichkeit bereitgestellt, durch welche in Folge von entsprechenden Toleranzlagen hervorgerufene Montageprobleme und eine damit unter Umständen eingeschränkte Siebwirkung stets sicher vermieden sind. Darüber hinaus ermöglicht die erfindungsgemäße Ausbildung des Siebes, dass neben dem bisher zum Einsatz gekommenen Trocknergehäusen aus Kupfer sich auch Trocknergehäuse aus anderen weniger verformbaren Materialien wie z. B. Messing oder Stahl eignen.In addition, due to the inventive design of the screen, this is on the one hand at the edge areas at risk of brittle fracture, if necessary before the sieving effect impairing damage protected and at the same time by a non-positive connection between the border and the one through which it flows Cross section of the dryer housing limiting tube wall in the dryer housing with low tooling effort can be fixed by simply pressing in, so that special tools on the one hand for handling the sintered sieve and on the other hand to fix it in the dryer housing are avoided. In addition, through the the sieve is surrounded by a surrounding protective frame Non-positive fixation achieved different tolerance levels of the flowed through Cross-section of the dryer housing provided adequate installation option, by which caused as a result of corresponding tolerance levels Installation problems and a sieving effect that may be restricted under certain circumstances are safely avoided. In addition, the inventive design of the Siebes that in addition to the previously used dryer housing made of copper dryer housing made of other less deformable materials such as. B. Brass or steel are suitable.

Nach einer bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, dass die Einfassung als eine mit dem Anschlagbund versehene Aufnahmehülse ausgebildet ist.According to a preferred embodiment of the subject of the invention provided that the enclosure as a provided with the stop collar Receiving sleeve is formed.

Durch eine derartige Einfassung ist das an seinen Rändern sprödbruchgefährdete Sieb besonders einfach und rasch ohne Krafteinwirkung mit einer Einfassung versehbar, in welcher es durch den Anschlagbund ohne zusätzliche Maßnahmen bereits weitestgehend positionsgenau und somit funktionssicher angeordnet ist.Such an enclosure means that the sieve is prone to brittle fracture at its edges can be provided with a bezel particularly easily and quickly without applying force, in which it already largely through the stop collar without additional measures is precisely positioned and thus functionally reliable.

Besonders sicher ist die Halterung für das Sieb ausgebildet, wenn nach einer nächsten bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, das die Halterung für das Sieb in der Aufnahmehülse durch den daran angeordneten Haltebund bewirkt ist.The holder for the sieve is particularly secure if after a next one preferred embodiment of the object of the invention is provided, which Holder for the sieve in the receiving sleeve through the retaining collar arranged thereon is effected.

Entsprechend einer nächsten bevorzugten Ausgestaltung des Gegenstandes der Erfindung ist vorgesehen, dass der Haltebund zur Halterung des Siebes durch eine mit der Aufnahmehülse verbundene Haltehülse erzeugt ist.According to a next preferred embodiment of the subject of Invention is provided that the retaining collar for holding the screen with a the holding sleeve connected to the holding sleeve is produced.

Durch ein auf diese Weise eingefasstes Sieb ist dieses auch in der Massenfertigung bei hoher Funktionssicherheit besonders schonend und somit sprödbruchsicher handhabbar.With a sieve framed in this way, it is also used in mass production high functional reliability, particularly gentle and therefore safe to handle against brittle fracture.

Gemäß einer alternativen Ausgestaltung des Gegenstandes der Erfindung ist vorgesehen, dass der Haltebund zur Halterung des Siebes durch spanlose Verformung der dem Anschlagbund der Aufnahmehülse gegenüberliegenden Stirnseite erzeugt ist.According to an alternative embodiment of the subject matter of the invention, that the retaining collar for holding the sieve by non-cutting deformation of the Stop collar of the receiving sleeve opposite end face is generated.

Hierdurch ist eine für die Massenfertigung besonders geeignete Einfassung für das Sieb geschaffen, welche ohne zusätzliche, den Fertigungsaufwand erhöhende Fügeteile und Verbindungsmaßnahmen einstoffig herstellbar ist, sodass eine zeitaufwendige Fügearbeit entfällt.This is a particularly suitable edging for the sieve for mass production created, which without additional, the manufacturing costs increasing joining parts and Connection measures can be produced in one material, so that time-consuming joining work not applicable.

Besonders günstig ist die Herstellung einer Einfassung für die Massenfertigung, wenn nach einer alternativen Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, dass die Einfassung für das Sieb durch ein Einbetten ihrer Konturenränder in spritz- oder gießtechnisch verarbeitbare Werkstoffe hergestellt ist.The manufacture of an enclosure for mass production is particularly inexpensive, if provided according to an alternative embodiment of the object of the invention is that the border for the sieve is embedded by embedding its contour edges in injection or materials that can be processed by casting.

Besonders einfach herstellbar ist eine Einfassung für ein Sieb, wenn nach einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, dass das Sieb einen kreisförmigen Querschnitt aufweist, an dessen Kontur die Einfassung konturenangepasst form- und kraftschlüssig umschließt.A frame for a sieve is particularly easy to produce, if after another preferred embodiment of the object of the invention is provided that the Sieve has a circular cross-section, on the contour of the border encloses form-fitting and force-fitting.

Eine besonders hohe Filterwirkung durch das Sieb ist erreicht, wenn nach einer letzten bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, dass das Sieb an seinen Umfangsrändern von der Einfassung flüssigkeitsdicht umschlossen ist. A particularly high filter effect through the sieve is achieved if after a last one preferred embodiment of the object of the invention is provided that the Sieve is enclosed in a liquid-tight manner on its peripheral edges by the border.

Die Erfindung ist in der nachfolgenden Beschreibung anhand eines in der beigefügten Zeichnung vereinfacht dargestellten Ausführungsbeispieles erläutert.The invention is described in the following description with reference to the one in the attached Drawing illustrated simplified embodiment.

Es zeigen:

Fig. 1
ein Zweitemperaturen-Haushalts-Kühlgerät, dessen thermisch voneinander getrennte Kammern übereinander angeordnete Fächer unterschiedlicher Temperatur mit separaten Türen verschließbar sind, in räumlicher Darstellung von vorne,
Fig. 2
in vereinfachter, schematischer Darstellung die zur Aufrechterhaltung der Temperatur in den Fächern des Zweitemperaturen-Kühlgerätes eingesetzte Kälteanlage mit einer in Reihenschaltung nach einem Verdichter angeordneten Trocknerpatrone
Fig. 3
die Trocknerpatrone, teilweise geschnitten, mit einem darin eingesetzten Sieb aus Sinterwerkstoffen, in annähernd natürlichem Maßstab und
Fig. 4
eine zu dem in Fig. 3 gezeigten Sieb alternative Ausführungsform für ein erfindungsgemäßes Sieb in Schnittdarstellung.
Show it:
Fig. 1
a two-temperature household cooling device, the thermally separated chambers of which one above the other, compartments of different temperatures can be closed with separate doors, in a spatial representation from the front,
Fig. 2
in a simplified, schematic representation, the refrigeration system used to maintain the temperature in the compartments of the two-temperature cooling device with a dryer cartridge arranged in series after a compressor
Fig. 3
the dryer cartridge, partially cut, with a sieve made of sintered materials inserted in it, in an almost natural scale and
Fig. 4
an alternative to the screen shown in Fig. 3 embodiment for a screen according to the invention in a sectional view.

Gemäß Fig. 1 ist ein Haushalts-Kühlgerät 10 gezeigt, dessen wärmeisolierendes Gehäuse 11 mit zwei daran angeschlagenen und separat zu öffnenden Türen 12 und 13 versehen ist. Über die Türen 12 und 13 sind thermisch voneinander getrennte, nicht näher bezeichnete Lagerfächer unterschiedlicher Temperatur zugänglich, deren Fächertemperatur mit Hilfe einer Kälteanlage 14 aufrechterhalten ist.1, a household refrigerator 10 is shown, the heat insulating Housing 11 with two attached and separately opening doors 12 and 13 is provided. The doors 12 and 13 are not thermally separated specified storage compartments of different temperatures accessible, their Fan temperature is maintained with the help of a refrigeration system 14.

Wie insbesondere aus Fig. 2 ersichtlich ist, weist die Kälteanlage 14 zwei Kältemittelkreisläufe I und II auf, welche von einem elektrisch ansteuerbaren 3/2-Wege-Magnetventil 15 mit Kältemittel beaufschlagbar sind. Dem elektrisch ansteuerbaren Magnetventil 15 ist an jedem seiner Ausgänge jeweils eine, über nicht näher bezeichnete Kältemittelleitungen mit dem Magnetventil 15 strömungstechnisch verbundene Drosseleinrichtung 16 bzw. 17 nachgeordnet, welche beide in Form eines spiralförmig aufgewickelten Kapillarrohres ausgebildet sind. Jede der Drosseleinrichtungen 16 bzw. 17 ist ausgangsseitig mit einer nicht näher dargestellten Einspritzstelle eines Kältemittelverdampfers 18 bzw. 19 strömungstechnisch verbunden, welche zueinander in Parallelschaltung liegen. Die Ausgänge der beiden Verdampfer 18 und 19 sind durch eine Kältemittelleitung 20 zusammengeführt, und an eine gemeinsame Saugleitung 21 angeschlossen, welche mit der Saugseite eines Kältemittelverdichters 22 strömungstechnisch verbunden ist. Dieser ist ausgangsseitig an einen Verflüssiger 23 angeschlossen, welcher seinerseits wiederum mit einer Trockenvorrichtung in Form einer Trocknerpatrone 24 verbunden ist. Wie aus Fig. 3 ersichtlich ist, weist die Trocknerpatrone 24, welche ausgangsseitig an das Magnetventil 15 angeschlossen ist, ein im wesentlichen rohrartiges Gehäuse mit kreiszylindrischem Querschnitt auf, dessen Rohrwandung 25 an seinen beiden Stirnseiten durch spanlose Formgebung, beispielsweise in Form eines Herunterhämmerns zu einem Anschlussstutzen 26 bzw. 27 geformt ist Benachbart zum Anschlussstutzen 27, ist ein entgegen der durch den Pfeil symbolisch angedeuteten Kältemittelflussrichtung durch die Trocknerpatrone 24 in dessen von seiner Rohrwandung 25 umschlossener Rohrraum 28 als Schmutzfilter dienender Siebkörper 30 vorgesehen, welcher an der inneren Rohrmantelfläche der Trocknerpatrone 24 flüssigkeitsdicht kraftschlüssig festgesetzt ist. Der Siebkörper 30 umfasst ein aus Sinterbronze, wie beispielsweise Sica-Grad, B100 gebildetes Sieb 31, welches an seinen Umfangsrändern von einer diesen Rändern konturentreu folgenden Einfassung 32 umgeben ist, welche das Sieb 31 rahmenartig umschließt und fixiert. Die Einfassung 32 ist im vorliegenden Ausführungsbeispiel durch eine Aufnahmehülse 33 erzeugt, welche aus einem einteiligen, plastisch verformbaren metallischen Kreishohlzylinder gebildet ist, welcher mit seiner inneren Mantelfläche die Mantelfläche des Siebes umgibt und welcher an einer seiner Stirnseiten einen durch eine vorgeformte Abwinklung seiner Mantelfläche zu seiner Zentrumsachse hin erzeugten Anschlagbund 34 aufweist. An dieser liegt das im wesentlichen kraftfrei in den Hohlzylinder eingelegte Sieb 31 mit einer seiner Stirnseiten zur Festlegung seiner montagerichtigen Position an. Zur Festsetzung des Siebes 31 innerhalb des Rohrraumes der Aufnahmehülse 33 wird deren über die Höhe des Siebes überstehende Rohrwandung spanlose derart verformt, dass ein Haltebund 35 gebildet ist, welcher zusammen mit dem Anschlagbund 34 und der Rohrmantelwandung der Aufnahmehülse die Einfassung 32 bilden, welche das Sieb 31 sowohl form- und kraftschlüssig umgreift also auch flüssigkeitsdicht umschließt. Zur Ausbildung der Einfassung 32 eignen sich neben plastisch verformbaren Metallen auch hochtemperaturbeständige, plastisch verformbare Kunststoffe sowie gieß- und spritzfähige Metalle.As can be seen in particular from FIG. 2, the refrigeration system 14 has two Refrigerant circuits I and II, which are controlled by an electrically controllable 3/2-way solenoid valve 15 can be acted upon with refrigerant. The electric controllable solenoid valve 15 is one at each of its outputs Refrigerant lines, not specified, with the solenoid valve 15 downstream flow restrictor 16 or 17, both in the form of a spirally wound capillary tube are trained. Each of the throttle devices 16 and 17 is on the output side with an injection point (not shown in detail) of a refrigerant evaporator 18 or 19 fluidically connected, which in parallel to each other lie. The outputs of the two evaporators 18 and 19 are through a Refrigerant line 20 merged, and to a common suction line 21 connected, which is connected to the suction side of a refrigerant compressor 22 is fluidly connected. This is on the output side to one Condenser 23 connected, which in turn with a Drying device in the form of a dryer cartridge 24 is connected. As can be seen from Fig. 3, the Dryer cartridge 24, which is connected on the output side to the solenoid valve 15 is having a substantially tubular housing circular cylindrical cross-section, the tube wall 25 on its two End faces through non-cutting shaping, for example in the form of a Hammering down is formed into a connecting piece 26 or 27 Adjacent to the connecting piece 27 is an opposite of that indicated by the arrow symbolically indicated direction of refrigerant flow through the dryer cartridge 24 in the tube space 28 enclosed by its tube wall 25 as Dirt filter serving screen body 30 is provided, which on the inner tube surface the dryer cartridge 24 fluid-tightly fixed is. The screen body 30 comprises a sintered bronze, such as Sica grade, B100 formed sieve 31, which on its peripheral edges of a surrounds these contours following the contour 32, which the Sieve 31 encloses and fixed like a frame. The bezel 32 is in the present Embodiment generated by a receiving sleeve 33, which from a one-piece, plastically deformable metallic circular hollow cylinder is formed, which with its inner surface surrounds the surface of the sieve and which on one of its faces has a pre-shaped bend its lateral surface produced stop collar 34 towards its center axis having. This is essentially force-free in the hollow cylinder inserted sieve 31 with one of its end faces for fixing its correct mounting position. Fixing the sieve 31 within the Pipe space of the receiving sleeve 33 is the projecting over the height of the screen Non-cutting tube wall deformed such that a retaining collar 35 is formed which is together with the stop collar 34 and the pipe jacket wall of the receiving sleeve form the border 32, which the sieve 31 both form and non-positively engages so that it also encloses liquid-tight. For training the border 32 are suitable in addition to plastically deformable metals also high temperature resistant, plastically deformable plastics as well as cast and sprayable metals.

Entsprechend einer in Fig. 4 dargestellten zweiten Ausführungsform für einen als Schmutzfilter dienenden Siebkörper 40 ist dessen Sieb 41 von einer zweiteilig aufgebauten Einfassung 42, rahmenartig form- und kraftschlüssig umschlossen. Die Einfassung 42, welche flüssigkeitsdicht an der inneren Rohrwandung einer Trocknerpatrone mittels eines Kraftschlusses gehalten ist, weist eine erste, in Form eines Kreishohlzylinders ausgebildete Aufnahmehülse 43 auf, welche wie die Aufnahmehülse 33 an einer ihrer Stirnseiten mit einer zu ihrer Zentrumsachse hingerichteten Abwinklung 44 versehen ist, deren Innenfläche als Anlagefläche für den Siebkörper 41 dient. Zur Fixierung des Siebes 41 ist eine zweite Haltehülse 45 vorgesehen, welche wie die Aufnahmehülse 43 in Art eines Kreishohlzylinders ausgebildet ist und bei welcher die Rohrwandung eine zu ihrer Zentrumsachse gerichtete Abwinklung 46 aufweist. Die Haltehülse 45 ist bezüglich ihres Durchmessers derart bemessen, dass sie in die Aufnahmehülse 43 einfügbar ist und im eingefügten Zustand mit ihrer äußeren Mantelfläche an der inneren Rohrmantelfläche der Aufnahmehülse 43 anliegt. Zur Fixierung des Siebes 41 innerhalb der Aufnahmehülse 43 ist die Haltehülse 45 innerhalb der Aufnahmehülse 43 angeordnet, wobei die Außenfläche der an der Haltehülse 45 angeordneten Abwinklung als Stützfläche für das Sieb 41 dient. Zur Erzeugung der Einfassung 42 sind die Aufnahmehülse 43 und die Haltehülse 45 im Bereich ihrer zusammenwirkenden Rohrmantelwandung miteinander form- und/oder kraftschlüssig, beispielsweise schweißtechnisch oder durch Verkrimpung verbunden, wobei durch die Verbindung der beiden Hülsen 43 und 45, die das Sieb 41 an ihrer Kontur form- und kraftschlüssig umschließende Einfassung 42 erzeugt ist, welche das Sieb 41 flüssigkeitsdicht umschließt. Wie für die Einfassung 32 sind für die Einfassung 42 neben plastisch verformbaren Metallen, plastisch verformbaren, hitzebeständigen Kunststoffen auch Metalle denkbar, welche ein geringeres plastisches Verformungsvermögen aufweisen, aber schweißtechnisch gut bearbeitbar sind.According to a second embodiment shown in FIG. 4 for a as Dirt filter serving sieve body 40, the sieve 41 is of two parts assembled bezel 42, frame-like positively and non-positively enclosed. The border 42, which is liquid-tight on the inner tube wall Dryer cartridge is held by means of a frictional connection, has a first, in Form of a circular hollow cylinder formed receiving sleeve 43, which like the receiving sleeve 33 on one of its end faces with one to its center axis Executed bend 44 is provided, the inner surface as a contact surface serves for the screen body 41. A second is used to fix the screen 41 Holding sleeve 45 is provided, which like the receiving sleeve 43 in the manner of a Circular hollow cylinder is formed and in which the tube wall one to her Has center axis directed bend 46. The holding sleeve 45 is dimensioned in terms of their diameter such that they fit into the receiving sleeve 43 is insertable and in the inserted state with its outer lateral surface abuts the inner tubular surface of the receiving sleeve 43. To fix the Siebes 41 within the receiving sleeve 43 is the holding sleeve 45 within the Receiving sleeve 43 is arranged, wherein the outer surface of the holding sleeve 45 arranged bend serves as a support surface for the sieve 41. For generation of the surround 42 are the receiving sleeve 43 and the holding sleeve 45 in the area their interacting tubular jacket wall with each other form and / or non-positively, for example by welding or by crimping, by connecting the two sleeves 43 and 45 which the sieve 41 at its contour enclosing form and force fit 42 is generated, which surrounds the sieve 41 in a liquid-tight manner. As for them Border 32 are for border 42 in addition to plastically deformable metals, plastically deformable, heat-resistant plastics also conceivable metals, which have a lower plastic deformability, but are easily machinable.

Claims (8)

  1. Cooling appliance, especially a domestic cooling appliance (10), such as a refrigerator or freezer, with at least one cooling circuit (I, II), within which a drying cartridge (24) is arranged, in the cartridge housing of which a sieve (31, 41) formed from a sintered material and flowed through by refrigerant is arranged, the sieve being surrounded at its circumferential edges by a frame-like surround (32, 42) by which the sieve (31, 41) is fixed in the flow-conducting cross-section of the drier housing, characterised in that the surround (32, 42) has an abutment collar (34, 44) and a retaining collar (35, 46) between which the sieve (31, 41) is retained in shape-locking and force-locking manner.
  2. Cooling appliance according to claim 1, characterised in that the surround (32, 42) is constructed as a receiving sleeve (43) provided with the abutment collar (34, 44).
  3. Cooling appliance according to claim 2, characterised in that the mounting for the sieve (31, 41) in the receiving sleeve (33, 43) is produced by the retaining collar (35, 46) arranged therein.
  4. Cooling appliance according to claim 3, characterised in that the retaining collar (46) for retention of the sieve (41) is produced by a retaining sleeve (45) connected with the receiving sleeve (43).
  5. Cooling appliance according to claim 3, characterised in that the retaining collar (46) for retention of the sieve (31) is produced by non-cutting deformation of the end opposite the abutment collar (34) of the receiving sleeve (33).
  6. Cooling appliance according to claim 1, characterised in that the surround (32, 42) for the sieve (31, 41) is produced by embedding of the profile edges thereof in materials processible by injection-moulding or casting.
  7. Cooling appliance according to one of claims 1 to 6, characterised in that the sieve (31, 41) has a circular cross-section, the profile of which encloses the surround (32, 42) in shape-locking and force-locking manner with profile matching to at least a substantial extent.
  8. Cooling appliance according to one of claims 1 to 7, characterised in that the sieve (31, 41) is liquid-tightly enclosed at its circumferential edges by the surround (32, 42).
EP96934756A 1995-12-20 1996-10-18 Refrigerating apparatus, in particular domestic refrigerating apparatus Expired - Lifetime EP0868638B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19547744A DE19547744A1 (en) 1995-12-20 1995-12-20 Refrigerator
DE19547744 1995-12-20
PCT/EP1996/004547 WO1997022841A1 (en) 1995-12-20 1996-10-18 Refrigerating apparatus, in particular domestic refrigerating apparatus

Publications (2)

Publication Number Publication Date
EP0868638A1 EP0868638A1 (en) 1998-10-07
EP0868638B1 true EP0868638B1 (en) 2001-07-11

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EP96934756A Expired - Lifetime EP0868638B1 (en) 1995-12-20 1996-10-18 Refrigerating apparatus, in particular domestic refrigerating apparatus

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EP (1) EP0868638B1 (en)
CN (1) CN1153031C (en)
BR (1) BR9612139A (en)
DE (2) DE19547744A1 (en)
TR (1) TR199800993T2 (en)
WO (1) WO1997022841A1 (en)

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DE10062666A1 (en) * 2000-12-15 2002-06-20 Bsh Bosch Siemens Hausgeraete magnetic valve
DE10062665A1 (en) * 2000-12-15 2002-06-20 Bsh Bosch Siemens Hausgeraete Solenoid valve for a refrigerant circuit
DE102004053272B3 (en) 2004-10-26 2006-04-27 Visteon Global Technologies, Inc. Intellectual Property Department, Van Buren Township Assembly for refrigerant circuits
DE102006006731A1 (en) * 2006-02-13 2007-08-16 Danfoss A/S refrigeration Equipment
CN101765750B (en) 2007-06-12 2012-03-21 丹福斯有限公司 A method for controlling a refrigerant distribution
DE102007028563A1 (en) 2007-06-19 2008-12-24 Danfoss A/S refrigeration Equipment
DE102007028564A1 (en) 2007-06-19 2008-12-24 Danfoss A/S Cooling system, has valve including flat springs that are operated to open valve, and manifold including rotor that operates flat springs fastened radially outside housing, where rotor operates radially inside flat springs
DE102007028565A1 (en) 2007-06-19 2008-12-24 Danfoss A/S refrigeration Equipment
DE102007028562B4 (en) 2007-06-19 2009-03-19 Danfoss A/S refrigeration Equipment
DE102010018543A1 (en) * 2010-03-01 2011-09-01 Liebherr-Hausgeräte Ochsenhausen GmbH Fridge and / or freezer
FR3116598A1 (en) * 2020-11-24 2022-05-27 Valeo Systemes Thermiques Refrigerant circuit comprising a particulate filter

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DE820133C (en) * 1943-06-01 1951-11-08 Gen Motors Corp Desiccant
US4078036A (en) * 1975-07-24 1978-03-07 Pittsfield Products, Inc. Cartridge filter construction
EP0594431B1 (en) * 1992-10-23 1998-01-07 Matsushita Refrigeration Company Refrigerant compressor and refrigeration system incorporating same
DE4242776A1 (en) * 1992-12-17 1994-06-23 Bosch Siemens Hausgeraete Cooling device, in particular multi-temperature cooling device
ES2133427T3 (en) * 1994-02-04 1999-09-16 Eaton Corp REFRIGERANT RECEIVER / DRYER.
US5522204A (en) * 1994-04-29 1996-06-04 Stanhope Products Company Desiccant container

Also Published As

Publication number Publication date
WO1997022841A1 (en) 1997-06-26
DE19547744A1 (en) 1997-06-26
EP0868638A1 (en) 1998-10-07
CN1153031C (en) 2004-06-09
TR199800993T2 (en) 1998-08-21
DE59607284D1 (en) 2001-08-16
BR9612139A (en) 1999-10-13
CN1205767A (en) 1999-01-20

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