EP0711963B1 - Refrigerator - Google Patents
Refrigerator Download PDFInfo
- Publication number
- EP0711963B1 EP0711963B1 EP95115790A EP95115790A EP0711963B1 EP 0711963 B1 EP0711963 B1 EP 0711963B1 EP 95115790 A EP95115790 A EP 95115790A EP 95115790 A EP95115790 A EP 95115790A EP 0711963 B1 EP0711963 B1 EP 0711963B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- refrigerant
- sectional area
- channels
- cooling
- channel cross
- 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.)
- Revoked
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
- 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
-
- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/12—Inflammable refrigerants
Definitions
- the invention relates to a refrigeration device with at least one refrigeration space, which is cooled by an evaporator integrated in a closed refrigeration circuit and formed from a composite plate, which evaporator is produced with refrigerant channels produced by the rollbond or Z-bond method for guiding the refrigerant circuit from one Compressor driven refrigerant is equipped.
- Refrigeration devices with an evaporator according to the preamble of claim 1 are known for example from EP-A-0464711 or DE-A-4141641.
- their refrigeration cycle nowadays instead of the anti-ozone layer or the greenhouse effect-promoting refrigerant based on fluorine-chlorine-hydrocarbons CFC or fluorine-hydrocarbon HFC is a hydrocarbon-based refrigerant such as isubutane used.
- the use of such refrigerants in the known refrigeration circuits which are acted upon with a lower density than previously used refrigerants, leads to a significant increase in the volume of refrigerant flowing through them in their refrigerant channels per unit of time.
- the object of the invention is to design an evaporator formed from a composite plate in its hydrocarbon-based refrigerant with simple constructive measures in such a way that a loss of performance - due to the evaporator in the refrigeration system - is prevented.
- This object is achieved according to the invention in that a refrigerant based on hydrocarbons is used as the refrigerant, which is guided in refrigerant channels, the channel cross-section of which compared to that based on fluorocarbons or fluorochlorocarbons Refrigerants higher volume flow of the hydrocarbon-based refrigerants is largely adapted to avoid loss of performance in the refrigeration system and that the refrigerant flow sections provided next to the evaporator in the refrigeration circuit are essentially unchanged with regard to their flowable cross section serving to guide refrigerants based on fluorocarbons or fluorinated chlorinated hydrocarbons are.
- the solution according to the invention minimizes the pressure drop of the refrigerant flowing in the refrigerant channels of the evaporator between the evaporator inlet and the evaporator outlet, as a result of which the evaporation temperature of the refrigerant is almost uniform over the entire evaporator surface and thus the refrigeration capacity of the refrigerant compressor and the energy balance of the refrigeration circuit is significantly increased. It is also achieved by this solution that the channel lengths and the number of which can be largely unchanged compared to operation with refrigerants based on HFC or CFC, so that a narrower ducting, which is difficult to control in terms of production technology, is avoided over the entire evaporator board, which would significantly change its size. In addition, such enables the condensers or throttle sections in the refrigerant circuit which have been used in the case of CFCs or CFCs to be used without refrigeration changes for the operation of hydrocarbons-based refrigerants.
- the channel cross-sectional area of the refrigerant channels for guiding the hydrocarbon-based refrigerant is increased by 25 to 50% compared to the channel cross-sectional area of the refrigerant channels for guiding refrigerants based on HFC or CFC.
- a particularly high performance improvement with even more cost-effective production is achieved with an increase in the cross-sectional area of the duct if, according to a further advantageous embodiment of the subject of the invention, the increase in the cross-sectional area of the duct of the refrigerant ducts, which serve to guide the hydrocarbon-based refrigerant, is 50% the cross-sectional area of the refrigerant channels which is used to guide the refrigerant based on HFC or CFC.
- the channel cross-sectional area is between 17 mm 2 and 18.5 mm 2 , but is preferably 18 mm 2 .
- a refrigerant channel is particularly streamlined and, on the other hand, is still easy to manufacture if, according to a next advantageous embodiment of the object of the invention, it is provided that the channel cross-sectional area has a hydraulic equivalent diameter of approximately 3 mm, which is composed of a channel width of 12 mm and a channel height of 2.1 mm results.
- a refrigeration circuit 10 which is part of a household refrigerator with a *** freezer compartment and is not shown, is shown in simplified form and is equipped with a compressor 11. This is connected on the pressure side to a condenser 12, the tubing of which is adapted in terms of the flowable cross section to refrigerants based on fluorohydrocarbons or fluorochlorohydrocarbons.
- a condenser 12 On the output side of the condenser 12 is connected a dryer cartridge 13, the output of which is provided with a throttle tube 14, the flowable cross section is adapted to refrigerants formed on the basis of fluorocarbon or fluorochlorohydrocarbons.
- the throttle tube 14 is laid over the major part of its tube length within a suction tube 15 connected on the suction side to the compressor 11, which is connected together with the throttle tube 14 to an evaporator 16 designed for a so-called single-tube connection.
- This is made of circuit board-like material and has two temperature zones, which are supplied by a continuous refrigerant duct with refrigerants driven by the compressor 11 and formed on the basis of hydrocarbons, such as isobutane.
- the two sections of different temperatures of the evaporator 16 are designed as a C-shaped freezer compartment evaporator 17 with a rear wall evaporator 19 for a normal cooling compartment, which is connected in terms of refrigeration via a connecting web 18.
- the evaporator 16 is formed by welding two aluminum sheet metal plates 20 and 21 of equal area, of which the plate 20 is provided with a pressure corresponding to its course to produce refrigerant channels, while the plate 21 is unprinted.
- an aluminum sheet with the designation AL 99.5 W7 with a material thickness of 0.75 mm has already been found to be suitable for producing the refrigerant channels 22, while an aluminum sheet with the designation AL has been found for the unprinted board 21 1230 and a material thickness of 0.6 mm has already achieved good results.
- the materials used can be used to produce refrigerant channels 22, the cross section of which is particularly suitable for the so-called roll bond process the management of hydrocarbon-based refrigerants, such as isobutane with the industrial name R600a, and which have a cross-sectional area whose size exceeds the duct cross-sectional areas used so far with CFC or CFC-based refrigerants by 50%.
- the invention can also be applied to a board-like evaporator 16, the refrigerant channels 22 of which are produced in the so-called Z-bonding process.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Lubricants (AREA)
Description
Die Erfindung betrifft ein Kältegerät mit wenigstens einem Kälteraum, welcher von einem in einem geschlossenen Kältekreislauf eingebundenen, aus einem Plattenverbund gebildeten Verdampfer gekühlt ist, welcher mit nach dem Rollbond - oder Z-Bond-Verfahren hergestellten Kältemitteln-Kanälen zur Führung des im Kältekreislauf von einem Verdichter angetriebenen Kältemittels ausgestattet ist.The invention relates to a refrigeration device with at least one refrigeration space, which is cooled by an evaporator integrated in a closed refrigeration circuit and formed from a composite plate, which evaporator is produced with refrigerant channels produced by the rollbond or Z-bond method for guiding the refrigerant circuit from one Compressor driven refrigerant is equipped.
Kältegeräte mit einem Verdampfer nach dem Oberbegriff des Anspruches 1 sind beispielsweise aus der EP-A-0464711 oder DE- A-4141641 bekannt. Bei Kältegeräten mit Verdampfern nach dem Oberbegriff des Anspruches 1 ist in deren Kältekreislauf heutzutage anstatt der ozonschichtfeindlichen bzw. den Treibhaus-Effekt fördernden Kältemittel auf der Basis von Fluor - Chlor -Kohlenwasserstoffen FCKW bzw. Fluor-Kohlenwasserstoff FKW ein auf Kohlenwasserstoffen basierendes Kältemittel wie beispielsweise Isubutan eingesetzt. Durch den Einsatz derartiger, im Vergleich zu den bisher eingesetzten Kältemitteln mit geringerer Dichte beaufschlagten Kältemittel in den bekannten Kältekreisläufen kommt es bei den eingebundenen Verdampfern in deren Kältemittel-Kanälen zu einem deutlichen Anstieg des durch sie fließenden Kältemittel-Volumens pro Zeiteinheit. Hieraus resultiert ein nicht unerheblicher Druckabfall entlang der Kältemittel-Kanäle, welcher seinerseits eine Leistungseinbuße des gesamten Kältesystems zur Folge hat. Zu einer besonders spürbaren Leistungseinbuße kommt es, wenn die auf Kohlenwasserstoffen basierenden Kältemittel bei für große Kälteleistungen ausgelegten Verdampfern zum Einsatz kommen.Refrigeration devices with an evaporator according to the preamble of claim 1 are known for example from EP-A-0464711 or DE-A-4141641. In refrigeration devices with evaporators according to the preamble of claim 1, their refrigeration cycle nowadays instead of the anti-ozone layer or the greenhouse effect-promoting refrigerant based on fluorine-chlorine-hydrocarbons CFC or fluorine-hydrocarbon HFC is a hydrocarbon-based refrigerant such as isubutane used. The use of such refrigerants in the known refrigeration circuits, which are acted upon with a lower density than previously used refrigerants, leads to a significant increase in the volume of refrigerant flowing through them in their refrigerant channels per unit of time. This results in a not inconsiderable drop in pressure along the refrigerant channels, which in turn leads to a loss in performance of the entire refrigeration system. A particularly noticeable loss of performance occurs when the hydrocarbon-based refrigerants are used in evaporators designed for high cooling capacities.
Aufgabe der Erfindung ist es, einen aus einem Plattenverbund gebildeten Verdampfer bei seinem im Betrieb auf Kohlenwasserstoff basierenden Kältemittel mit einfachen konstruktiven Maßnahmen derart zu gestalten, daß eine Leistungseinbuße - bedingt durch den Verdampfer im Kältesystem - verhindert ist.The object of the invention is to design an evaporator formed from a composite plate in its hydrocarbon-based refrigerant with simple constructive measures in such a way that a loss of performance - due to the evaporator in the refrigeration system - is prevented.
Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß als Kältemittel in bekannter Weise ein auf Kohlenwasserstoffen basierendes Kältemittel eingesetzt wird, welches in Kältemittel-Kanäle geführt ist, deren Kanal-Querschnitt an dem im Vergleich zu den auf Fluor-Kohlenwasserstoffen oder Fluor-Chlorkohlenwasserstoffen basierenden Kältemitteln höheren Volumenstrom der auf Kohlenwasserstoffen basierenden Kältemittel zur Vermeidung von Leistungseinbußen im Kältesystem weitestgehend angepaßt ist und daß die neben dem Verdampfer im Kältekreislauf vorgesehenen Kältemittel-Fließstrecken hinsichtlich ihres zur Führung von auf Fluor-Kohlenwasserstoffen oder Fuor-Chlorkohlenwasserstoffen basierenden Kältemittel dienenden durchströmbaren Querschnitt im wesentlichen unverändert sind.This object is achieved according to the invention in that a refrigerant based on hydrocarbons is used as the refrigerant, which is guided in refrigerant channels, the channel cross-section of which compared to that based on fluorocarbons or fluorochlorocarbons Refrigerants higher volume flow of the hydrocarbon-based refrigerants is largely adapted to avoid loss of performance in the refrigeration system and that the refrigerant flow sections provided next to the evaporator in the refrigeration circuit are essentially unchanged with regard to their flowable cross section serving to guide refrigerants based on fluorocarbons or fluorinated chlorinated hydrocarbons are.
Durch die erfindungsgemäße Lösung ist der Druckabfall des in den Kältemittelkanälen des Verdampfers strömenden Kältemittels zwischen Verdampfereingang und Verdampferausgang minimiert, wodurch die Verdampfungstemperatur des Kältemittels über die gesamte Verdampferfläche nahezu vergleichmäßigt und somit die Kälteleistung des Kältemittelverdichters und die Energiebilanz des Kältekreislaufes deutlich erhöht ist. Ferner ist durch diese Lösung erreicht, daß die Kanallängen und deren Anzahl im Vergleich zu einem Betrieb mit auf FKW oder FCKW basierenden Kältemitteln weitestgehend unverändert sein können, so daß eine engere, fertigungstechnisch nur schwer beherrschbare Kanalführung über die gesamte Verdampferplatine, die deren Größe wesentlich verändern würde, vermieden ist. Außerdem ermöglicht eine solche Lösung, daß die bisher bei auf FKW oder FCKW basierenden Kältemitteln zum Einsatz gekommenen Verflüssiger bzw. Drosselstrecken im Kältemittel-Kreislauf ohne kältetechnische Änderungen auch für den Betrieb von auf Kohlenwasserstoffen basierenden Kältemitteln einsetzbar sind.The solution according to the invention minimizes the pressure drop of the refrigerant flowing in the refrigerant channels of the evaporator between the evaporator inlet and the evaporator outlet, as a result of which the evaporation temperature of the refrigerant is almost uniform over the entire evaporator surface and thus the refrigeration capacity of the refrigerant compressor and the energy balance of the refrigeration circuit is significantly increased. It is also achieved by this solution that the channel lengths and the number of which can be largely unchanged compared to operation with refrigerants based on HFC or CFC, so that a narrower ducting, which is difficult to control in terms of production technology, is avoided over the entire evaporator board, which would significantly change its size. In addition, such a solution enables the condensers or throttle sections in the refrigerant circuit which have been used in the case of CFCs or CFCs to be used without refrigeration changes for the operation of hydrocarbons-based refrigerants.
Nach einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß die Kanalquerschnittsfläche der Kältemittelkanäle zur Führung des auf Kohlenwasserstoff basierenden Kältemittels gegenüber der Kanalquerschnittsfläche der Kältemittelkanäle zur Führung von auf FKW oder FCKW basierenden Kältemittel um 25 bis 50 % vergrößert ist.According to a further preferred embodiment of the subject matter of the invention, it is provided that the channel cross-sectional area of the refrigerant channels for guiding the hydrocarbon-based refrigerant is increased by 25 to 50% compared to the channel cross-sectional area of the refrigerant channels for guiding refrigerants based on HFC or CFC.
Eine Vergrößerung der Kanalquerschnittsfläche in dieser Größenordnung ist vor allem in sogenannten Rollbond-Herstellverfahren der Kältemittelkanäle auf den platinenartigen Verdampfern auch kostenmäßig noch günstig.An increase in the duct cross-sectional area of this magnitude is also still cost-effective, especially in so-called roll bond manufacturing processes for the refrigerant ducts on the plate-like evaporators.
Eine besonders hohe Leistungsverbesserung bei noch kostengünstiger Fertigung wird bei einer Vergrößerung der Kanalquerschnittsfläche erzielt, wenn nach einer weiteren vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß die Vergrößerung der Kanalquerschnittsfläche der Kältemittelkanäle, welche zur Führung des auf Kohlenwasserstoffen basierenden Kältemittels dienen, 50 % gegenüber der Kanalquerschnittsfläche der Kältemittelkanäle beträgt, welche zur Führung von des auf FKW oder FCKW basierenden Kältemittels dienen.A particularly high performance improvement with even more cost-effective production is achieved with an increase in the cross-sectional area of the duct if, according to a further advantageous embodiment of the subject of the invention, the increase in the cross-sectional area of the duct of the refrigerant ducts, which serve to guide the hydrocarbon-based refrigerant, is 50% the cross-sectional area of the refrigerant channels which is used to guide the refrigerant based on HFC or CFC.
Eine besonders deutliche Reduzierung der Druckverluste für das strömende Kältemittel in den Kältemittelkanälen wird erzielt, wenn nach einer nächsten vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß die Kanalquerschnittsfläche zwischen 17 mm2 und 18,5 mm2 liegt aber vorzugsweise 18 mm2 beträgt.A particularly significant reduction in the pressure losses for the flowing refrigerant in the refrigerant channels is achieved if, according to a next advantageous embodiment of the object of the invention, it is provided that the channel cross-sectional area is between 17 mm 2 and 18.5 mm 2 , but is preferably 18 mm 2 .
Einerseits besonders strömungsgünstig ausgebildet und andererseits noch gut fertigbar ist ein Kältemittelkanal, wenn nach einer nächsten vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß die Kanalquerschnittsfläche einen hydraulischen Ersatzdurchmesser von etwa 3 mm aufweist, welcher sich aus einer Kanalbreite von 12 mm und einer Kanalhöhe von 2,1 mm ergibt.On the one hand, a refrigerant channel is particularly streamlined and, on the other hand, is still easy to manufacture if, according to a next advantageous embodiment of the object of the invention, it is provided that the channel cross-sectional area has a hydraulic equivalent diameter of approximately 3 mm, which is composed of a channel width of 12 mm and a channel height of 2.1 mm results.
Besonders günstige Ergebnisse hinsichtlich eines minimierten Druckabfalles für das in den Kältemittelkanälen des Verdampfers strömenden Kältemittels hat sich ergeben, wenn nach einer weiteren vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß das auf Kohlenwasserstoff basierende Kältemittel als Isobutan ausgebildet ist.Particularly favorable results with regard to a minimized pressure drop for the refrigerant flowing in the refrigerant channels of the evaporator have been obtained if, according to a further advantageous embodiment of the subject of the invention, it is provided that the hydrocarbon-based refrigerant is designed as isobutane.
Die Erfindung ist in der nachfolgenden Beschreibung anhand eines in der Zeichnung vereinfacht dargestellten Ausführungsbeispieles erläutert. Es zeigen:
- Fig. 1
- in schematischer Darstellung einen Kältekreislauf mit einem darin eingebundenen, aus zusammengefügten Platinen gefertigten Zweitemperaturen-Verdampfer,
- Fig. 2
- in Ansicht von oben den Zweitemperaturen-Verdampfer in einbaufertigem Zustand, mit in einer der Platinen eingeformten Kältemittelkanälen, in raumbildlicher Darstellung und
- Fig. 3
- in vergrößertem Maßstab einen der Kältemittelkanäle in Schnittdarstellung, gemäß der Schnittlinie III-III.
- Fig. 1
- a schematic representation of a refrigeration cycle with a two-temperature evaporator integrated therein, made from assembled boards,
- Fig. 2
- in top view the two-temperature evaporator in the ready-to-install state, with refrigerant channels molded into one of the circuit boards, in a spatial representation and
- Fig. 3
- on an enlarged scale one of the refrigerant channels in a sectional view, according to section line III-III.
Gemäß Fig. 1 ist ein zu einem nicht dargestellten Haushalts-Kühlschrank mit ***-Gefrierfach gehörender, vereinfacht schematisch dargestellter Kältekreislauf 10 gezeigt, welcher mit einem Verdichter 11 ausgestattet ist. Dieser ist druckseitig an einen Verflüssiger 12 angeschlossen, dessen Berohrung hinsichtlich des durchströmbaren Querschnitts an auf Fluor-Kohlenwasserstoffe oder Fluor-Chlorkohlenwasserstoffe basierende Kältemittel angepaßt ist. An den Verflüssiger 12 schließt sich ausgangsseitig eine Trocknerpatrone 13 an, deren Ausgang mit einem Drosselrohr 14 versehen ist, dessen durchströmbarer Querschnitt an auf der Basis von Fluor-Kohlenwasserstoff oder Fluor-Chlorkohlenwasserstoffen gebildeten Kältemittel angepaßt ist. Das Drosselrohr 14 ist über den überwiegenden Teil seiner Rohrlänge innerhalb eines saugseitig an den Verdichter 11 angeschlossenen Saugrohres 15 verlegt, welches zusammen mit dem Drosselrohr 14 an einen für einen sogenannten Einrohranschluß ausgebildeten Verdampfer 16 angeschlossen ist. Dieser ist aus platinenartigem Material gebildet und weist zwei Temperaturzonen auf, welche von einem durchgehenden Kältemittelkanalzug mit vom Verdichter 11 angetriebenen, auf der Basis von Kohlenwasserstoffen gebildeten Kältemittel, wie beispielsweise Isobutan versorgt sind.According to FIG. 1, a refrigeration circuit 10, which is part of a household refrigerator with a *** freezer compartment and is not shown, is shown in simplified form and is equipped with a compressor 11. This is connected on the pressure side to a condenser 12, the tubing of which is adapted in terms of the flowable cross section to refrigerants based on fluorohydrocarbons or fluorochlorohydrocarbons. On the output side of the condenser 12 is connected a dryer cartridge 13, the output of which is provided with a throttle tube 14, the flowable cross section is adapted to refrigerants formed on the basis of fluorocarbon or fluorochlorohydrocarbons. The throttle tube 14 is laid over the major part of its tube length within a suction tube 15 connected on the suction side to the compressor 11, which is connected together with the throttle tube 14 to an evaporator 16 designed for a so-called single-tube connection. This is made of circuit board-like material and has two temperature zones, which are supplied by a continuous refrigerant duct with refrigerants driven by the compressor 11 and formed on the basis of hydrocarbons, such as isobutane.
Wie insbesondere aus Fig. 2 hervorgeht, sind die beiden Abschnitte unterschiedlicher Temperatur des Verdampfers 16 als C-förmig gebogener Gefrierfachverdampfer 17 mit einem über einen Verbindungssteg 18 kältetechnisch damit verbundenen Rückwandverdampfer 19 für ein Normalkühlfach ausgebildet. Der Verdampfer 16 ist im vorliegenden Fall durch Verschweißen von zwei gleichflächigen Aluminium-Blechplatinen 20 und 21 gebildet, von denen die Platine 20 zur Erzeugung von Kältemittelkanälen mit einem deren Verlauf entsprechenden Druck versehen ist, während die Platine 21 unbedruckt ist. Für die bedruckte Aluminium-Blechplatine 20 hat sich zur Erzeugung der Kältemittelkanäle 22 ein Aluminiumblech mit der Bezeichnung AL 99,5 W7 mit einer Materialstärke von 0,75 mm als bereits gut geeignet herausgestellt, währenddessen für die unbedruckte Platine 21 ein Aluminiumblech mit der Bezeichnung AL 1230 und einer Materialstärke von 0,6 mm bereits gute Ergebnisse erbracht hat. Mit den zur Anwendung kommenden Materialien lassen sich im sogenannten Rollbond-Verfahren Kältemittelkanäle 22 herstellen, deren Querschnitt besonders für die Führung von auf Kohlenwasserstoff basierenden Kältemitteln, wie Isobutan mit der Industriebezeichnung R600a geeignet ist und welche eine Querschnittsfläche aufweisen, deren Größe die der bislang bei auf FKW oder FCKW basierenden Kältemittel zum Einsatz gekommene Kanalquerschnittsflächen um 50 % übersteigt. Dadurch kann der durch das Isobutan innerhalb der Kältemittelkanäle 22 verursachte höhrer Volumenstrom des vom Verdichter 11 innerhalb der Kältemittelkanäle 22 bewegten Kältemittels keinen den Wirkungsgrad des Kältekreislaufes 10 deutlich herabsetzenden Druckabfällen innerhalb der Kältemittelkanäle 22 erzeugen. Gute Ergebnisse hinsichtlich eines deutlich verminderten Druckabfalles über die gesamte Länge der Kältemittelkanäle 22 haben sich bei einer Kanalbreite "b" von 12 mm und einer Kanalhöhe "h" von 2,1 mm mit einem hydraulischen Ersatzdurchmesser von 3 mm und mit einer daraus resultierenden Kanalquerschnittsfläche "A" von 18 mm2 ergeben, wobei die den Kanalabmessungen üblicherweise anhaftenden Fertigungstoleranzen die positiven Ergebnisse nicht zu schmälern vermögen.As can be seen in particular from FIG. 2, the two sections of different temperatures of the evaporator 16 are designed as a C-shaped freezer compartment evaporator 17 with a rear wall evaporator 19 for a normal cooling compartment, which is connected in terms of refrigeration via a connecting web 18. In the present case, the evaporator 16 is formed by welding two aluminum sheet metal plates 20 and 21 of equal area, of which the plate 20 is provided with a pressure corresponding to its course to produce refrigerant channels, while the plate 21 is unprinted. For the printed aluminum sheet plate 20, an aluminum sheet with the designation AL 99.5 W7 with a material thickness of 0.75 mm has already been found to be suitable for producing the refrigerant channels 22, while an aluminum sheet with the designation AL has been found for the unprinted board 21 1230 and a material thickness of 0.6 mm has already achieved good results. The materials used can be used to produce refrigerant channels 22, the cross section of which is particularly suitable for the so-called roll bond process the management of hydrocarbon-based refrigerants, such as isobutane with the industrial name R600a, and which have a cross-sectional area whose size exceeds the duct cross-sectional areas used so far with CFC or CFC-based refrigerants by 50%. As a result, the higher volume flow of the refrigerant moved by the compressor 11 within the refrigerant channels 22 caused by the isobutane within the refrigerant channels 22 cannot produce any pressure drops within the refrigerant channels 22 that significantly reduce the efficiency of the refrigeration circuit 10. Good results with regard to a significantly reduced pressure drop over the entire length of the refrigerant channels 22 have been obtained with a channel width "b" of 12 mm and a channel height "h" of 2.1 mm with a hydraulic equivalent diameter of 3 mm and with a resulting channel cross-sectional area " A "of 18 mm 2 , the manufacturing tolerances usually adhering to the duct dimensions not being able to detract from the positive results.
Es versteht sich, daß die Erfindung auch auf einen platinenartigen Verdampfer 16 anwendbar ist, dessen Kältemittelkanäle 22 im sogenannten Z-Bondverfahren hergestellt sind.It goes without saying that the invention can also be applied to a board-like evaporator 16, the refrigerant channels 22 of which are produced in the so-called Z-bonding process.
Claims (6)
- Cooling appliance with at least one cooling chamber, which is cooled by an evaporator (6) which is incorporated in a closed cooling circuit (10), is formed from a composite plate and is equipped with refrigerant channels (22), produced according to the roll-bond or Z-bond method, for conducting refrigerant moved in the cooling circuit (10) by a compressor (11), characterised in that a refrigerant based on hydrocarbons is used as refrigerant in known manner, which is guided in refrigerant channels (22), the channel cross-section (A) of which is matched to the volume flow, which is higher by comparison with refrigerants based on hydrofluorocarbons or hydrofluorochlorocarbons, of the refrigerant based on hydrocarbons for the avoidance of performance losses, which are caused by the evaporator, in the cooling system and that the refrigerant flow paths (12, 14) provided, apart from the evaporator, in the cooling circuit (10) are substantially unchanged with respect to the throughflow cross-section thereof serving for conducting refrigerant based on hydrofluorocarbons or hydrofluorochlorocarbons.
- Cooling appliance according to claim 1, characterised in that the channel cross-sectional area (A) of the refrigerant channels (22) for conducting the refrigerant based on hydrocarbons is increased by 25 to 50% relative to the channel cross-sectional area of corresponding refrigerant channels for conducting refrigerant based on hydrofluorocarbons or hydrofluorochlorocarbons.
- Cooling appliance according to claim 1 or 2, characterised in that the increase in the channel cross-sectional area (A) of the refrigerant channels (22) for conducting the refrigerant based on hydrocarbons amounts to 50% of the channel cross-sectional area of the corresponding channels for conducting refrigerant based on hydrofluorocarbons or hydrofluorochlorocarbons.
- Cooling appliance according to one of claims 1 to 3, characterised in that the channel cross-sectional area (A) lies between 17 and 18.5 mm2, but preferably amounts to 18 mm2.
- Cooling appliance according to one of claims 1 to 4, characterised in that the channel cross-sectional area (A) has a hydraulic equivalent diameter of approximately 3 mm, which results from a channel width (b) of 12 mm and a channel height (h) of 2.1 mm.
- Cooling appliance according to one of claims 1 to 5, characterised in that the refrigerant based on hydrocarbon is isobutane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SI9530405T SI0711963T1 (en) | 1994-11-09 | 1995-10-06 | Refrigerator |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4439996A DE4439996C5 (en) | 1994-11-09 | 1994-11-09 | The refrigerator |
| DE4439996 | 1994-11-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0711963A1 EP0711963A1 (en) | 1996-05-15 |
| EP0711963B1 true EP0711963B1 (en) | 2000-04-05 |
Family
ID=6532864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95115790A Revoked EP0711963B1 (en) | 1994-11-09 | 1995-10-06 | Refrigerator |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0711963B1 (en) |
| CN (1) | CN1090743C (en) |
| BR (1) | BR9505127A (en) |
| DE (2) | DE4439996C5 (en) |
| ES (1) | ES2145862T3 (en) |
| GR (1) | GR3033298T3 (en) |
| PT (1) | PT711963E (en) |
| SI (1) | SI0711963T1 (en) |
| TR (1) | TR199501397A2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10053420A1 (en) * | 2000-10-27 | 2002-05-08 | Bsh Bosch Siemens Hausgeraete | Evaporator and refrigerator for a zeotropic mixture of refrigerants |
| DE20104425U1 (en) * | 2001-03-14 | 2002-07-25 | Liebherr Werk Lienz Gmbh | Refrigerator and / or freezer |
| US7165326B2 (en) * | 2001-12-17 | 2007-01-23 | Showa Denko K.K. | Heat exchanger and process for fabricating same |
| DE102007044392A1 (en) * | 2007-09-18 | 2009-03-19 | BSH Bosch und Siemens Hausgeräte GmbH | Refrigerating appliance with an evaporator arrangement and manufacturing method for the evaporator arrangement |
| EP2594646A3 (en) | 2007-09-21 | 2013-11-06 | BASF Plant Science GmbH | Plant with increased yield |
| IT1397587B1 (en) * | 2009-12-21 | 2013-01-16 | Indesit Co Spa | REFRIGERANT APPLIANCE WITH ROLL-BOND EVAPORATOR. |
| DE102010003087A1 (en) * | 2010-03-19 | 2011-09-22 | BSH Bosch und Siemens Hausgeräte GmbH | Chiller and evaporator for it |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07109343B2 (en) * | 1990-06-29 | 1995-11-22 | 昭和アルミニウム株式会社 | Freezer / refrigerator evaporator |
| DE9115640U1 (en) * | 1991-12-17 | 1992-02-13 | Bosch-Siemens Hausgeraete Gmbh, 8000 Muenchen, De | |
| DE4141641A1 (en) * | 1991-12-17 | 1993-06-24 | Bosch Siemens Hausgeraete | SECOND TEMPERATURE REFRIGERATOR |
| DE4338895A1 (en) * | 1993-11-15 | 1995-05-18 | Krupp Vdm Gmbh | Evaporator |
-
1994
- 1994-11-09 DE DE4439996A patent/DE4439996C5/en not_active Expired - Fee Related
-
1995
- 1995-10-06 EP EP95115790A patent/EP0711963B1/en not_active Revoked
- 1995-10-06 DE DE59508129T patent/DE59508129D1/en not_active Revoked
- 1995-10-06 PT PT95115790T patent/PT711963E/en unknown
- 1995-10-06 SI SI9530405T patent/SI0711963T1/en unknown
- 1995-10-06 ES ES95115790T patent/ES2145862T3/en not_active Expired - Lifetime
- 1995-11-08 BR BR9505127A patent/BR9505127A/en not_active IP Right Cessation
- 1995-11-09 CN CN95121549A patent/CN1090743C/en not_active Expired - Fee Related
- 1995-11-09 TR TR95/01397A patent/TR199501397A2/en unknown
-
2000
- 2000-04-21 GR GR20000400980T patent/GR3033298T3/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GR3033298T3 (en) | 2000-09-29 |
| DE4439996A1 (en) | 1996-05-15 |
| SI0711963T1 (en) | 2000-08-31 |
| PT711963E (en) | 2000-07-31 |
| CN1132341A (en) | 1996-10-02 |
| CN1090743C (en) | 2002-09-11 |
| BR9505127A (en) | 1997-09-09 |
| DE59508129D1 (en) | 2000-05-11 |
| EP0711963A1 (en) | 1996-05-15 |
| DE4439996C5 (en) | 2006-08-10 |
| DE4439996C2 (en) | 1999-06-02 |
| ES2145862T3 (en) | 2000-07-16 |
| TR199501397A2 (en) | 1996-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE102007028252B4 (en) | Refrigerant cycle device with ejector | |
| DE60011616T2 (en) | HEAT EXCHANGER WITH MULTICHANNEL TUBES | |
| DE60012822T2 (en) | heat exchangers | |
| DE69911131T2 (en) | heat exchangers | |
| DE102004024825B4 (en) | Heat exchange tube with multiple fluid paths | |
| DE102005007108A1 (en) | Ejector | |
| WO2006120083A1 (en) | Heat exchanger for a refrigerating device | |
| DE69814717T2 (en) | Heat exchanger with several heat exchange parts | |
| DE10349150A1 (en) | Heat exchanger, in particular for motor vehicles | |
| EP0711963B1 (en) | Refrigerator | |
| EP1798506A2 (en) | Heat exchanger, more particularly evaporator | |
| DE19942458B4 (en) | Heat exchanger for a vehicle air conditioning | |
| DE69729836T2 (en) | Evaporator | |
| DE102007016849A1 (en) | Refrigerating appliance with three temperature zones | |
| DE10257767A1 (en) | Heat exchanger for condenser or gas cooler for air conditioning installations has two rows of channels for coolant with manifolds at ends and has ribs over which air can flow | |
| DE3310236A1 (en) | Refrigerant distributor for the evaporator of a refrigerator or heat pump | |
| EP1798507A2 (en) | Heat exchanger, more particularly evaporator | |
| EP0789206A2 (en) | Refrigeration apparatus | |
| DE3990036C2 (en) | Oil cooler and process for its manufacture | |
| WO2000017588A1 (en) | Single-circuit cooling system | |
| DE3521255C3 (en) | Gas-cooled conductor | |
| EP0918199A2 (en) | Evaporator | |
| DE102019217368A1 (en) | Tubular body for a heat exchanger and heat exchanger | |
| DE3300683A1 (en) | FRIDGE | |
| DE3134300C2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB GR IT PT SE |
|
| AX | Request for extension of the european patent |
Free format text: SI PAYMENT 951023 |
|
| RAX | Requested extension states of the european patent have changed |
Free format text: SI PAYMENT 951023 |
|
| 17P | Request for examination filed |
Effective date: 19961016 |
|
| 17Q | First examination report despatched |
Effective date: 19980120 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: BSH BOSCH UND SIEMENS HAUSGERAETE GMBH |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB GR IT PT SE |
|
| AX | Request for extension of the european patent |
Free format text: SI PAYMENT 19951023 |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20000405 |
|
| REF | Corresponds to: |
Ref document number: 59508129 Country of ref document: DE Date of ref document: 20000511 |
|
| ET | Fr: translation filed | ||
| ITF | It: translation for a ep patent filed |
Owner name: STUDIO JAUMANN P. & C. S.N.C. |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2145862 Country of ref document: ES Kind code of ref document: T3 |
|
| REG | Reference to a national code |
Ref country code: PT Ref legal event code: SC4A Free format text: AVAILABILITY OF NATIONAL TRANSLATION Effective date: 20000407 |
|
| PLBQ | Unpublished change to opponent data |
Free format text: ORIGINAL CODE: EPIDOS OPPO |
|
| PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
| PLBQ | Unpublished change to opponent data |
Free format text: ORIGINAL CODE: EPIDOS OPPO |
|
| PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
| PLBF | Reply of patent proprietor to notice(s) of opposition |
Free format text: ORIGINAL CODE: EPIDOS OBSO |
|
| 26 | Opposition filed |
Opponent name: WHIRLPOOL EUROPE SRL Effective date: 20001220 |
|
| 26 | Opposition filed |
Opponent name: EVIDAL SCHMOELE GMBH & CO. KG Effective date: 20010105 Opponent name: WHIRLPOOL EUROPE SRL Effective date: 20001220 |
|
| PLBF | Reply of patent proprietor to notice(s) of opposition |
Free format text: ORIGINAL CODE: EPIDOS OBSO |
|
| PLBF | Reply of patent proprietor to notice(s) of opposition |
Free format text: ORIGINAL CODE: EPIDOS OBSO |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| PLAW | Interlocutory decision in opposition |
Free format text: ORIGINAL CODE: EPIDOS IDOP |
|
| APAC | Appeal dossier modified |
Free format text: ORIGINAL CODE: EPIDOS NOAPO |
|
| APBQ | Date of receipt of statement of grounds of appeal recorded |
Free format text: ORIGINAL CODE: EPIDOSNNOA3O |
|
| RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: BSH BOSCH UND SIEMENS HAUSGERAETE GMBH |
|
| APAA | Appeal reference recorded |
Free format text: ORIGINAL CODE: EPIDOS REFN |
|
| REG | Reference to a national code |
Ref country code: SI Ref legal event code: IF |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20050923 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: PT Payment date: 20051004 Year of fee payment: 11 |
|
| APAH | Appeal reference modified |
Free format text: ORIGINAL CODE: EPIDOSCREFNO |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20051014 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20051019 Year of fee payment: 11 |
|
| APBU | Appeal procedure closed |
Free format text: ORIGINAL CODE: EPIDOSNNOA9O |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20051024 Year of fee payment: 11 Ref country code: GR Payment date: 20051024 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20051031 Year of fee payment: 11 |
|
| PLAO | Information deleted related to despatch of communication that opposition is rejected |
Free format text: ORIGINAL CODE: EPIDOSDREJ1 |
|
| PLCK | Communication despatched that opposition was rejected |
Free format text: ORIGINAL CODE: EPIDOSNREJ1 |
|
| RDAF | Communication despatched that patent is revoked |
Free format text: ORIGINAL CODE: EPIDOSNREV1 |
|
| RDAG | Patent revoked |
Free format text: ORIGINAL CODE: 0009271 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: PATENT REVOKED |
|
| 27W | Patent revoked |
Effective date: 20051019 |
|
| GBPR | Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state |
Free format text: 20051019 |
|
| REG | Reference to a national code |
Ref country code: SE Ref legal event code: ECNC |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20061031 Year of fee payment: 12 |