EP0547316B1 - Two-temperature household refrigeration apparatus with a single cycle - Google Patents
Two-temperature household refrigeration apparatus with a single cycle Download PDFInfo
- Publication number
- EP0547316B1 EP0547316B1 EP92117206A EP92117206A EP0547316B1 EP 0547316 B1 EP0547316 B1 EP 0547316B1 EP 92117206 A EP92117206 A EP 92117206A EP 92117206 A EP92117206 A EP 92117206A EP 0547316 B1 EP0547316 B1 EP 0547316B1
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- EP
- European Patent Office
- Prior art keywords
- collector
- connecting piece
- refrigerant
- temperature single
- evaporator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
- F25B39/022—Evaporators with plate-like or laminated elements
- F25B39/024—Evaporators with plate-like or laminated elements with elements constructed in the shape of a hollow panel
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- 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
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
- F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
Definitions
- the invention relates to a two-temperature single-circuit cooling device for the household with a room evaporator and a freezer compartment evaporator connected upstream thereof and having a ceiling, an upright wall and a floor, which are fluidically connected to one another by refrigerant channels, one in the freezer compartment evaporator
- Upright wall arranged collector is provided, which is equipped with an inlet and an outlet channel, which are higher than its intermittent volume forming the collecting space, which is flowed through by the refrigerant flowing from the room evaporator to the freezer evaporator.
- An evaporator for such a cooling device is known from FR-A 2 451 559.
- DE-OS 37 03 902 discloses a schematically illustrated plate evaporator for use in cooling devices, which has a rectangular collecting chamber, to the higher rectangular sides of which a refrigerant supply line and a suction line are connected. While the latter is arranged essentially perpendicular to the higher rectangular side of the collecting chamber, the refrigerant supply line opens into the collecting chamber via a U-shaped line piece. This connection of the refrigerant supply line has the consequence that the refrigerant inflow to the collecting chamber is redirected twice and thus the kinetic energy of the refrigerant inflow is significantly reduced.
- the refrigerant accumulated in the collection chamber during the downtime of the refrigerant compressor remains to a large extent in the collection chamber when the compressor is restarted and is therefore not available to the refrigeration circuit.
- the dimensions of the collecting chamber are significantly overdimensioned, so that a significant increase in the kinetic energy for the refrigerant inflow is in no way sufficient to transport the refrigerant accumulated in the collecting chamber into the refrigerant circuit.
- the volume of the collector When the refrigerant compressor is at a standstill, the volume of the collector must be sufficient to accommodate the refrigerant flowing back from the ceiling area and the upright wall and the liquid refrigerant that may be conveyed from the condenser to the evaporator due to the constant pressure drop. If the volume of the collector is too small, it can happen that liquid refrigerant flows into the suction pipe, evaporates there and ices the suction pipe or, in the worst case, into the refrigerant compressor reaches, in the pressure chamber evaporates and forms ice, which could damage the compressor when restarting.
- the collector In the event that the collector is designed too large, the refrigerant accumulated there during the standstill of the refrigerant compressor is not completely sucked out of the collector when the refrigerant compressor starts up. The amount not extracted does not circulate in the refrigerant circuit, so that it is underfilled. In order to avoid that the refrigerant compressor runs for a disproportionately long time in order to achieve the required cooling capacity, the quantity of refrigerant not contributing to the cooling capacity must also be filled into the refrigerant circuit.
- the invention has for its object to dimensionally and fluidically design the collector for a generic refrigeration device such that its collector, which provides sufficient collecting space for liquid refrigerant when the refrigerant compressor is at a standstill, is completely emptied when the compressor restarts, and there is no residue even during the running time of the compressor forms liquid refrigerant in the collecting space.
- This object is achieved according to the invention in that flow conditions for the refrigerant through the arrangement of the inflow and outflow connections to the collecting space and through the dimensions of this intermittent collecting space are formed in the collector, which cause a preferential loading of the entire bottom area of the collector by the refrigerant flowing through.
- the solution according to the invention ensures in a simple manner that the collector is completely emptied when the refrigerant compressor is restarted, so that the required cooling capacity in the refrigeration compartments is achieved with a minimum amount of refrigerant and the shortest possible compressor runtime.
- the collector is rectangular and is arranged in the upright wall of the freezer evaporator, the longer sides of the rectangle being parallel to the longer sides of the upright wall.
- Such a solution has the advantage that the volume of the header, without having to make it particularly deep, offers sufficient collecting space for the liquid refrigerant when the refrigerant compressor is at a standstill, as well as the advantage that the pressure fluctuations in the refrigerant circuit that frequently occur during the standstill phase have no influence on the liquid refrigerant in the collector.
- a particularly favorable flow through the collector down to its bottom area with refrigerant during operation of the refrigerant compressor if, according to a next, advantageous embodiment of the object of the invention, it is provided that the inflow and outflow connections on the higher, longer one Rectangular side of the collector substantially perpendicular to this, are arranged on the lateral edges of the collector.
- the amount of refrigerant in a refrigerant circuit to achieve the required cooling capacity can be kept particularly low if, according to a further preferred embodiment of the object of the invention, it is provided that the longer sides of the rectangular collector in the range from 150 mm to 250 mm and the shorter sides in the range of 40 mm to 80 mm, but the collector preferably has the dimensions 200 mm x 60 mm.
- the collector is particularly expediently equipped if, according to a further preferred embodiment of the object of the invention, it is provided that the inflow and outflow connections of the collector have the same cross section.
- the volume of the collector is interrupted by button-like impressions.
- Such a solution has the advantage that the flow conditions within the collecting space can be influenced in a simple manner.
- a two-temperature single-circuit refrigerator 10 is shown, which, as usual, is equipped with an overhead freezer compartment 11 and a normal refrigerator compartment 13 arranged underneath and separated from this by a heat-insulating intermediate wall 12.
- the side walls of the normal cooling compartment 13 are provided with grooves 14 formed in the inner container of the refrigerator 10 for inserting shelves (not shown).
- the refrigerator 10 equipped with a refrigerant compressor (not shown) is equipped with a defrostable space evaporator 15 assigned to the normal cooling compartment 13 and a U-shaped freezer compartment evaporator 16 assigned to the freezer compartment 11, which has a ceiling 17, an upright wall serving as a rear wall 18 and has a bottom 19, which as the ceiling 17 and bottom 19th serving legs of the U-shaped shape are bent in the same direction from the upright wall 18.
- the upright wall 18 forms an approximately vertical wall section, while the ceiling 17 and the floor 19 are approximately horizontal.
- a throttle tube 21 which serves as an injection point and is located in a suction pipe 20 and through which liquid refrigerant flows into the ceiling 17.
- the refrigerant is guided inside the ceiling 17 in a channel part 22, which still merges in the ceiling 17 in a feed channel 23 designed as a double channel, through which the refrigerant reaches the floor 19 via the upright wall 18.
- the bottom 19 flows through refrigerant in a meandering channel section 24, which still connects in the bottom area outside the transition to the upright wall 18 to a discharge channel 25, which is also designed as a double channel, through which the refrigerant flows back into the ceiling 17 via the upright wall 18, where it is guided in a duct section 26 laid in turns (see in particular FIG. 3).
- the duct section 26 opens into a double-pass duct 27 which is arranged with the major part of its duct length on a web-like connecting bridge 28 which mechanically connects the space evaporator 15 to the freezer compartment evaporator 16 arranged in front of it in the refrigerant circuit and via that of the duct arrangement 29 of the room evaporator 15 is supplied with refrigerant.
- a further channel 30 which is also double-ended, which is connected upstream to the channel arrangement 29 of the space evaporator 14 and opens into a channel line 31 downstream.
- the channel line 31, which continues upstream to the intake manifold 20, is interposed in the upright wall 18 with a rectangular collector 32 interrupting its continuous course, the longer rectangular sides of which run parallel to the longer sides of the upright wall 18 together with the shorter ones Rectangle sides delimit the area of its collecting space 33.
- the collecting space 33 of the collector 32 is fluidically connected to the channel line 31 by an inlet connection 34 and an outlet connection 35, which are arranged on the higher, longer rectangular side 36 essentially perpendicular to this and at a distance from one another.
- the distance between the two nozzles 34 and 35 is dimensioned such that they lie on the lateral edges of the collector 32, the outer contour of which is formed by an extension of the two shorter sides of the rectangle to the higher rectangular side 36, while the nozzle 34 is formed to form the inner contour and 35 the higher-lying side of the rectangle 36 is pulled up at its two ends at a distance from the respective extension of the shorter side of the rectangle.
- the collecting space 33 is further equipped with its volume-interrupting button-like impressions 37, through which, together with the arrangement of the inlet connection 34 and the outlet connection 35 to the collecting space 33 and in combination with its dimensions, flow conditions for the refrigerants flowing into the collector 32 from the space evaporator 15 are formed, which bring about a preferential loading of the entire bottom area of the collector 32 by the refrigerant flowing through.
- buttons-like impressions (37) can be adjusted in size depending on the requirements of the flow conditions in the collecting space (33) of the collector (32).
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Description
Die Erfindung betrifft ein Zweitemperaturen-Einkreiskühlgerät für den Haushalt mit einem Raum-Verdampfer und einem diesem vorgeschalteten, eine Decke, eine aufrechte Wand und einen Boden aufweisenden Gefrierfach-Verdampfer, die miteinander durch Kältemittelkanäle strömungstechnisch verbunden sind, wobei im Gefrierfach-Verdampfer ein in dessen aufrechter Wand angeordneter Sammler vorgesehen ist, der mit einem Zufluß- und einem Abflußkanal ausgestattet ist, die höher liegen als sein den Sammelraum bildendes mit Unterbrechungen versehenes Volumen, das von aus dem Raum-Verdampfer zum Gefrierfach-Verdampfer strömenden Kältemittel durchströmt wird.The invention relates to a two-temperature single-circuit cooling device for the household with a room evaporator and a freezer compartment evaporator connected upstream thereof and having a ceiling, an upright wall and a floor, which are fluidically connected to one another by refrigerant channels, one in the freezer compartment evaporator Upright wall arranged collector is provided, which is equipped with an inlet and an outlet channel, which are higher than its intermittent volume forming the collecting space, which is flowed through by the refrigerant flowing from the room evaporator to the freezer evaporator.
Ein Verdampfer für ein derartiges Kühlgerät ist aus der FR-A 2 451 559 bekannt.An evaporator for such a cooling device is known from FR-A 2 451 559.
Ferner ist aus der DE-OS 37 03 902 ein zum Einsatz in Kühlgeräten dienender, schematisch dargestellter Plattenverdampfer bekannt, welcher eine rechteckförmige Sammelkammer aufweist, an deren höherliegenden Rechteckseiten eine Kältemittelzufuhrleitung und eine Saugleitung angeschlossen ist. Während letztere im wesentlichen senkrecht zur höherliegenden Rechteckseite der Sammelkammer angeordnet ist, mündet die Kältemittelzuführleitung über ein U-förmig geformtes Leitungsstück in der Sammelkammer. Dieser Anschluß der Kältemittelzuführleitung hat zur Folge, daß der Kältemittelzustrom zur Sammelkammer zweimal umgelenkt ist und somit die kinetische Energie des Kältemittelzustroms deutlich herabgesetzt ist. Hieraus ergibt sich, daß das sich während der Stillstandszeit des Kältemittelverdichters in der Sammelkammer angesammelte Kältemittel bei einem Wiederanlaufen des Verdichters zu einem überwiegenden Anteil in der Sammelkammer zurückbleibt und somit dem Kältekreis nicht zur Verfügung steht. Erschwerend kann noch hinzukommen, daß die Sammelkammer hinsichtlich ihrer Abmessungen deutlich überdiemensioniert ist, so daß auch eine erhebliche Erhöhung der kinetischen Energie für den Kältemittelzustrom in keiner Weise ausreichend ist, um das in der Sammelkammer angesammelte Kältemittel in den Kältemittelkreislauf zu transportieren.Furthermore, DE-OS 37 03 902 discloses a schematically illustrated plate evaporator for use in cooling devices, which has a rectangular collecting chamber, to the higher rectangular sides of which a refrigerant supply line and a suction line are connected. While the latter is arranged essentially perpendicular to the higher rectangular side of the collecting chamber, the refrigerant supply line opens into the collecting chamber via a U-shaped line piece. This connection of the refrigerant supply line has the consequence that the refrigerant inflow to the collecting chamber is redirected twice and thus the kinetic energy of the refrigerant inflow is significantly reduced. It follows from this that the refrigerant accumulated in the collection chamber during the downtime of the refrigerant compressor remains to a large extent in the collection chamber when the compressor is restarted and is therefore not available to the refrigeration circuit. To make matters worse, the dimensions of the collecting chamber are significantly overdimensioned, so that a significant increase in the kinetic energy for the refrigerant inflow is in no way sufficient to transport the refrigerant accumulated in the collecting chamber into the refrigerant circuit.
Bei Kühlgeräten der genannten Art ist man bestrebt, die für die Fächer unterschiedlicher Temperatur erforderliche Kühlleistung in den einzelnen Fächern bei möglichst minimaler Verdichterlaufzeit und geringstmöglicher Kältemittelmenge im Kältemittelkreislauf zu erreichen. In diesem Zusammenhang ist die Dimensionierung des im Gefrierfach angeordneten Sammlers von erheblicher Bedeutung.In cooling devices of the type mentioned, efforts are made to achieve the cooling capacity required for the compartments of different temperatures in the individual compartments with the shortest possible compressor runtime and the smallest possible amount of refrigerant in the refrigerant circuit. In this context, the dimensioning of the collector arranged in the freezer compartment is of considerable importance.
Bei Stillstand des Kältemittelverdichters muß das Volumen des Sammlers ausreichend sein, um das aus dem Deckenbereich und der aufrechten Wand zurücklaufende Kältemittel und das aufgrund des ständigen Druckgefälles vom Verflüssiger zum Verdampfer hin u.U. geförderte flüssige Kältemittel aufnehmen zu können. Ist das Volumen des Sammlers zu gering bemessen, so kann es vorkommen, daß flüssiges Kältemittel bis in das Saugrohr fließt, dort verdampft und das Saugrohr vereist oder im schlimmsten Fall in den Kältemittelverdichter gelangt, in dessen Druckraum verdampft und Eis bildet, wodurch der Verdichter beim Wiederanlaufen beschädigt werden könnte.When the refrigerant compressor is at a standstill, the volume of the collector must be sufficient to accommodate the refrigerant flowing back from the ceiling area and the upright wall and the liquid refrigerant that may be conveyed from the condenser to the evaporator due to the constant pressure drop. If the volume of the collector is too small, it can happen that liquid refrigerant flows into the suction pipe, evaporates there and ices the suction pipe or, in the worst case, into the refrigerant compressor reaches, in the pressure chamber evaporates and forms ice, which could damage the compressor when restarting.
Für den Fall, daß der Sammler zu groß ausgelegt ist, wird das dort während des Stillstandes des Kältemittelverdichters angesammelte Kältemittel beim Anlaufen des Kältemittelverdichters nicht vollkommen aus dem Sammler abgesaugt. Die nicht abgesaugte Menge zirkuliert nicht im Kältemittelkreislauf, so daß dieser unterfüllt ist. Um zu vermeiden, daß der Kältmittelverdichter unverhältnismäßig lange Zeit läuft, um die geforderte Kühlleistung zu erzielen, muß die nicht zur Kühlleistung beitragende Kältemittelmenge zusätzlich in den Kältemittelkreislauf eingefüllt werden.In the event that the collector is designed too large, the refrigerant accumulated there during the standstill of the refrigerant compressor is not completely sucked out of the collector when the refrigerant compressor starts up. The amount not extracted does not circulate in the refrigerant circuit, so that it is underfilled. In order to avoid that the refrigerant compressor runs for a disproportionately long time in order to achieve the required cooling capacity, the quantity of refrigerant not contributing to the cooling capacity must also be filled into the refrigerant circuit.
Der Erfindung liegt die Aufgabe zugrunde, den Sammler für ein gattungsgemäßes Kühlgerät maßlich und strömungstechnisch so auszulegen, daß dessen bei stillstehendem Kältemittelverdichter ausreichend Sammelraum für flüssiges Kältemittel bietender Sammler beim Wiederanlaufen des Verdichters vollkommen leergesaugt wird und auch während der Laufzeit des Verdichters-sich kein Rückstand an flüssigem Kältemittel im Sammelraum bildet.The invention has for its object to dimensionally and fluidically design the collector for a generic refrigeration device such that its collector, which provides sufficient collecting space for liquid refrigerant when the refrigerant compressor is at a standstill, is completely emptied when the compressor restarts, and there is no residue even during the running time of the compressor forms liquid refrigerant in the collecting space.
Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß durch die Anordnung des Zufluß- und des Abflußstutzens zum Sammelraum und durch die Abmaße dieses mit Unterbrechungen versehenen Sammelraumes Strömungsverhältnisse für das Kältemittel im Sammler gebildet sind, die eine bevorzugte Beaufschlagung des gesamten Bodenbereiches des Sammlers durch das durchströmende Kältemittel bewirken.This object is achieved according to the invention in that flow conditions for the refrigerant through the arrangement of the inflow and outflow connections to the collecting space and through the dimensions of this intermittent collecting space are formed in the collector, which cause a preferential loading of the entire bottom area of the collector by the refrigerant flowing through.
Durch die erfindungsgemäße Lösung wird auf einfache Weise sichergestellt, daß beim Wiederanlaufen des Kältemittelverdichters der Sammler vollständig entleert wird, sodaß die erforderliche Kühlleistung in den Kältefächern mit minimaler Kältemittelmenge bei geringstmöglicher Verdichterlaufzeit erzielt wird.The solution according to the invention ensures in a simple manner that the collector is completely emptied when the refrigerant compressor is restarted, so that the required cooling capacity in the refrigeration compartments is achieved with a minimum amount of refrigerant and the shortest possible compressor runtime.
Nach einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß der Sammler rechteckförmig ausgebildet und in der aufrechten Wand des Gefrierfachverdampfers angeordnet ist, wobei die längeren Seiten des Rechtecks parallel zu den längeren Seiten der aufrechten Wand sind.According to a further preferred embodiment of the object of the invention it is provided that the collector is rectangular and is arranged in the upright wall of the freezer evaporator, the longer sides of the rectangle being parallel to the longer sides of the upright wall.
Eine solche Lösung hat sowohl den Vorteil, daß das Volumen des Sammlers, ohne diesen besonders tief gestalten zu müssen, ausreichend Sammelraum für das flüssige Kältemittel bei Stillstand des Kältemittelverdichters bietet, als auch noch den Vorzug, daß die in der Stillstandsphase häufig auftretenden Druckschwankungen im Kältemittelkreislauf auf das sich im Sammler befindende flüssige Kältemittel keinen Einfluß haben.Such a solution has the advantage that the volume of the header, without having to make it particularly deep, offers sufficient collecting space for the liquid refrigerant when the refrigerant compressor is at a standstill, as well as the advantage that the pressure fluctuations in the refrigerant circuit that frequently occur during the standstill phase have no influence on the liquid refrigerant in the collector.
Besonders günstig durchströmt wird der Sammler bis in seinen Bodenbereich mit Kältemittel bei Betrieb des Kältemittelverdichters, wenn nach einer nächsten, vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß der Zufluß- und der Abflußstutzen an der höher liegenden längeren Rechteckseite des Sammlers im wesentlichen senkrecht zu dieser, an den seitlichen Rändern des Sammlers angeordnet sind.A particularly favorable flow through the collector down to its bottom area with refrigerant during operation of the refrigerant compressor if, according to a next, advantageous embodiment of the object of the invention, it is provided that the inflow and outflow connections on the higher, longer one Rectangular side of the collector substantially perpendicular to this, are arranged on the lateral edges of the collector.
Besonders gering gehalten werden kann die Kältmittelmenge in einem Kältemittelkreislauf zur Erzielung der erforderlichen Kühlleistung wenn nach einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, daß die längeren Seiten des rechteckförmigen Sammlers im Bereich von 150 mm bis 250 mm und die kürzeren Seiten im Bereich von 40 mm bis 80 mm liegen, aber der Sammler vorzugsweise die Abmessung 200 mm x 60 mm aufweist.The amount of refrigerant in a refrigerant circuit to achieve the required cooling capacity can be kept particularly low if, according to a further preferred embodiment of the object of the invention, it is provided that the longer sides of the rectangular collector in the range from 150 mm to 250 mm and the shorter sides in the range of 40 mm to 80 mm, but the collector preferably has the dimensions 200 mm x 60 mm.
Besonders zweckmäßig ist der Sammler ausgestattet, wenn nach einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, daß der Zufluß- und der Abflußstutzen des Sammlers gleichen Querschnitt aufweisen.The collector is particularly expediently equipped if, according to a further preferred embodiment of the object of the invention, it is provided that the inflow and outflow connections of the collector have the same cross section.
Gemäß einer nächsten bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß das Volumen des Sammlers durch knopfartige Einprägungen unterbrochen ist.According to a next preferred embodiment of the object of the invention it is provided that the volume of the collector is interrupted by button-like impressions.
Eine solche Lösung hat den Vorteil, daß auf einfache Weise gezielt die Strömungsverhältnisse innerhalb des Sammelraumes beeinflußbar sind.Such a solution has the advantage that the flow conditions within the collecting space can be influenced in a simple manner.
Die Erfindung ist in der nachfolgenden Beschreibung anhand eines in einer Zeichnung vereinfacht dargestellten Ausführungsbeispieles erläutert.The invention is explained in the following description with reference to an embodiment shown in simplified form in a drawing.
Es zeigen:
- Fig. 1
- im Ausschnitt einen Zweitemperaturen-Einkreiskühlschrank, mit einem Gefrierfach und einem unterhalb diesem angeordneten Normalkühlfach, teilweise geschnitten, um dessen Verdampfersystem sichtbar zu machen, in raumbildlicher Darstellung,
- Fig. 2
- in Ansicht von oben, die mit den Ausprägungen für die Kältemittelkanäle versehene Seite des einbaufertig geformten Verdampfersystems mit in der aufrechten Wand des Gefrierfaches angeordneten Sammler raumbildlicher Darstellung und
- Fig. 3
- in Ansicht von unten den Gefrierfach-Verdampfer mit dem in seiner Rückwand angeordneten Sammler in raumbildlicher Darstellung.
- Fig. 1
- in the cutout a two-temperature single-circuit refrigerator, with a freezer compartment and a normal refrigerator compartment arranged below it, partially cut to make its evaporator system visible, in a spatial representation,
- Fig. 2
- in view from above, the side provided with the characteristics for the refrigerant channels of the ready-to-install shaped evaporator system with a spatial representation and arranged in the upright wall of the freezer compartment
- Fig. 3
- in view from below the freezer compartment evaporator with the collector arranged in its rear wall in a spatial representation.
Gemäß Fig. 1 ist ein Zweitemperaturen-Einkreiskühlschrank 10 dargestellt, der wie üblich mit einem obenliegenden Gefrierfach 11 und einem darunter angeordneten, durch eine wärmeisolierende Zwischenwand 12 von diesem getrennten Normalkühlfach 13 ausgestattet ist. Die Seitenwände des Normalkühlfachs 13 sind mit in dem Innenbehälter des Kühlschranks 10 eingeformten Nuten 14 zum Einschieben nicht dargestellter Etageren versehen.1, a two-temperature single-
Der mit einem nicht dargestellten Kältemittelverdichter ausgerüstete Kühlschrank 10 ist mit einem dem Normalkühlfach 13 zugeordneten, abtaubaren Raum-Verdampfer 15 und einem dem Gefrierfach 11 zugeordneten U-förmig ausgebildeten Gefrierfach-Verdampfer 16 ausgestattet, der eine Decke 17, eine als Rückwand dienende, aufrechte Wand 18 und einen Boden 19 aufweist, wobei die als Decke 17 und Boden 19 dienenden Schenkel der U-förmigen Gestalt gleichsinnig von der aufrechten Wand 18 abgebogen sind. In Einbaulage nach Fig. 1 bildet die aufrechte Wand 18 einen annähernd senkrechtstehenden Wandabschnitt, während die Decke 17 und der Boden 19 in etwa waagerecht liegen.The
Wie insb. aus Fig. 2 hervorgeht, ist in der Decke 17 des Gefrierfach-Verdampfers 16 ein als Einspritzstelle dienendes, in einem Saugrohr 20 verlegtes Drosselrohr 21 angeordnet, über das flüssiges Kältemittel in die Decke 17 einströmt.As can be seen in particular from FIG. 2, in the
Das Kältemittel wird innerhalb der Decke 17 in einem Kanalteil 22 geführt, der noch in der Decke 17 in einem als Doppelkanal ausgeführten Zuführkanal 23 übergeht, durch den das Kältemittel über die aufrechte Wand 18 in den Boden 19 gelangt. Den Boden 19 durchströmt Kältemittel in einem mäanderartig angelegten Kanalabschnitt 24, der noch im Bodenbereich außerhalb dem Übergang zur aufrechten Wand 18 an einen ebenfalls als Doppelkanal ausgebildeten Abführkanal 25 anschließt, durch den das Kältemittel über die aufrechte Wand 18 wieder in die Decke 17 einströmt, wo es in einem in Windungen verlegten Kanalstück 26 geführt ist (siehe hierzu insb. Fig. 3). Das Kanalstück 26 mündet in einen doppelzügigen Kanal 27, der mit dem überwiegenden Teil seiner Kanallänge auf einer stegartigen Verbindungsbrücke 28 angeordnet ist, die den Raum-Verdampfer 15 mit dem vor ihm im Kältemittelkreislauf angeordneten Gefrierfach-Verdampfer 16 mechanisch verbindet und über die der Kanalanordnung 29 des Raum-Verdampfers 15 Kältemittel zugeführt wird.The refrigerant is guided inside the
Auf der Verbindungsbrücke 28 ist neben dem Kanal 27 ein weiterer, ebenfalls doppelzügig ausgeführter Kanal 30 angeordnet, der stromauf mit der Kanalanordnung 29 des Raum-Verdampfers 14 verbunden ist und stromab in einen Kanalstrang 31 mündet. Dem Kanalstrang 31, der in seinem weiteren Verlauf stromauf an das Saugrohr 20 anschließt, ist in der aufrechten Wand 18 ein seinen durchgehenden Verlauf unterbrechender, rechteckförmiger Sammler 32 dazwischengeschaltet, dessen längere, zu den längeren Seiten der aufrechten Wand 18 parallelverlaufende Rechteckseiten zusammen mit den kürzeren Rechteckseiten die Fläche seines Sammelraumes 33 eingrenzen.On the connecting
Der Sammelraum 33 des Sammlers 32 ist durch einen Zuflußstutzen 34 und einen Abflußstutzen 35, die an der höher liegenden, längeren Rechteckseite 36 im wesentlichen senkrecht zu dieser und im Abstand voneinander angeordnet sind, mit dem Kanalstrang 31 strömungstechnisch verbunden. Der Abstand der beiden Stutzen 34 und 35 ist so bemessen, daß diese an den seitlichen Rändern des Sammlers 32 liegen, wobei deren Außenkontur durch eine Verlängerung der beiden kürzeren Rechteckseiten zur höher liegenden Rechteckseite 36 hin gebildet ist, während zur Bildung der Innenkontur der Stutzen 34 und 35 die höher liegende Rechteckseite 36 an ihren beiden Enden im Abstand zu der jeweiligen Verlängerung der kürzeren Rechteckseite hochgezogen ist.The
Der Sammelraum 33 ist weiterhin mit sein Volumen unterbrechenden, knopfartigen Einprägungen 37 ausgestattet, durch die zusammen mit der Anordnung des Zuflußstutzen 34 und des Abflußstutzen 35 zum Sammelraum 33 hin und in Kombination mit dessen Abmaßen Strömungsverhältnisse für das aus dem Raum-Verdampfer 15 in den Sammler 32 einströmende Kältemittel gebildet sind, die eine bevorzugte Beaufschlagung des gesamten Bodenbereiches des Sammlers 32 durch das durchströmende Kältemittel bewirken.The
Aus Versuchen hat sich ergeben, daß sich bereits eine gute Durchströmung des Sammlerbodens zeigt, wenn die längeren Rechteckseiten eine Länge von 200 mm und die kürzeren Rechteckseiten eine Länge von 60 mm aufweisen und der Zuflußstutzen 34 und der Abflußstutzen 35 mit gleichem Strömungsquerschnitt ausgestattet sind.Experiments have shown that there is already a good flow through the collector bottom when the longer sides of the rectangle are 200 mm long and the shorter sides are 60 mm long and the
Es versteht sich, daß die knopfartigen Einprägungen (37) je nach Anforderung an die Strömungsverhältnisse im Sammelraum (33) des Sammlers (32) in ihrer Größe angepaßt werden können.It goes without saying that the button-like impressions (37) can be adjusted in size depending on the requirements of the flow conditions in the collecting space (33) of the collector (32).
Claims (6)
- Two-temperature single-circuit refrigerating appliance (10) for the household, with a room evaporator (15) and a freezing compartment evaporator (16), which is connected in front thereof and comprises a ceiling (17), an upright wall (28) and a base (19), which evaporators are connected together in terms of flow technology by coolant channels (27, 30), wherein a collector (32) is provided in freezing compartment evaporator (16), is arranged in the upright wall (18) thereof and is equipped with an inflow connecting piece (34) and an outflow connecting piece (35), which connecting pieces lie higher than a volume which forms the collecting chamber (33), is provided with interruptions and is flowed through by coolant flowing from the room evaporator (15) to the freezing compartment evaporator (16), characterised thereby, that flow conditions are formed for the coolant in the collector (32), which cause a preferential loading of the entire base region of the collector (32) by the coolant flowing through, by the arrangement of the inflow connecting piece (34) and the outflow connecting piece (35) relative to the collecting chamber (33) and by the dimensions of this collecting chamber (33) which is provided with interruptions.
- Two-temperature single-circuit refrigerating appliance according to claim 1, characterised thereby, that the collector (32) is formed to be rectangular, wherein the longer sides of the rectangle are parallel to the longer sides of the upright wall (18).
- Two-temperature single-circuit refrigerating appliance according to claim 2, characterised thereby, that the inflow connecting piece (34) and the outflow connecting piece (35) are arranged at the higher longer rectangle side (36) of the collector (32) substantially perpendicularly thereto and at the lateral rims of the collector (32).
- Two-temperature single-circuit refrigerating appliance according to claim 2 or 3, characterised thereby, that the longer sides of the rectangular collector (32) lie in the range of 150 to 250 millimetres and the shorter sides lie in the range of 40 to 80 millimetres, but the collector (32) preferably has the dimension of 200 by 60 millimetres.
- Two-temperature single-circuit refrigerating appliance according to one of the claims 1 to 4, characterised thereby, that the inflow connecting piece (34) and the outflow connecting piece (35) of the collector (32) display the same cross-section.
- Two-temperature single-circuit refrigerator appliance according to one of the claims 1 to 5, characterised thereby, that the volume of the collector (32) is interrupted by button-like indentations (37).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9115640U DE9115640U1 (en) | 1991-12-17 | 1991-12-17 | |
| DE9115640U | 1991-12-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0547316A1 EP0547316A1 (en) | 1993-06-23 |
| EP0547316B1 true EP0547316B1 (en) | 1997-03-19 |
Family
ID=6874309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92117206A Expired - Lifetime EP0547316B1 (en) | 1991-12-17 | 1992-10-08 | Two-temperature household refrigeration apparatus with a single cycle |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0547316B1 (en) |
| DE (2) | DE9115640U1 (en) |
| ES (1) | ES2101780T3 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4439996C5 (en) * | 1994-11-09 | 2006-08-10 | BSH Bosch und Siemens Hausgeräte GmbH | The refrigerator |
| DE29504538U1 (en) * | 1995-03-16 | 1995-05-18 | Bosch Siemens Hausgeraete | Evaporator arrangement, in particular compressor-operated household refrigeration devices |
| DE19818288B4 (en) * | 1998-04-23 | 2009-04-30 | BSH Bosch und Siemens Hausgeräte GmbH | cooling unit |
| DE19902043A1 (en) * | 1999-01-20 | 2000-08-03 | Aeg Hausgeraete Gmbh | Method for reducing the noise generated in refrigeration circuit evaporators has a honeycomb liquid collection system located at the low point of an evaporator. |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1070199B (en) * | 1959-12-03 | Robert Bosch Gmbh Stuttgart | Kuhlmaschmenevaporator | |
| US2162586A (en) * | 1937-06-12 | 1939-06-13 | Gen Electric | Refrigerant evaporator |
| US2619811A (en) * | 1950-05-02 | 1952-12-02 | Nash Kelvinator Corp | Refrigerant evaporator |
| US2737785A (en) * | 1951-10-09 | 1956-03-13 | Admiral Corp | Refrigerator evaporator |
| US3263440A (en) * | 1964-12-14 | 1966-08-02 | Electrolux Ab | Refrigeration |
| FR1527573A (en) * | 1966-06-18 | 1968-05-31 | Bosch Hausgeraete Gmbh | evaporator for refrigerating apparatus, in particular for household refrigerators and refrigerating apparatus provided with said evaporator |
| IT1126976B (en) * | 1979-03-12 | 1986-05-21 | Schmoele Metall R & G | IMPROVEMENT IN THE EVAPORATORS FOR REFRIGERATING SYSTEMS |
| DE3703902A1 (en) * | 1987-02-09 | 1988-08-18 | Liebherr Hausgeraete | Plate evaporator for refrigerators and freezers |
-
1991
- 1991-12-17 DE DE9115640U patent/DE9115640U1/de not_active Expired - Lifetime
-
1992
- 1992-10-08 ES ES92117206T patent/ES2101780T3/en not_active Expired - Lifetime
- 1992-10-08 EP EP92117206A patent/EP0547316B1/en not_active Expired - Lifetime
- 1992-10-08 DE DE59208235T patent/DE59208235D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE9115640U1 (en) | 1992-02-13 |
| DE59208235D1 (en) | 1997-04-24 |
| ES2101780T3 (en) | 1997-07-16 |
| EP0547316A1 (en) | 1993-06-23 |
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