EP0298416A2 - Method of removing the transparency-impairing internal fog layer from refrigerator panes, and refrigerator for carrying out the method - Google Patents
Method of removing the transparency-impairing internal fog layer from refrigerator panes, and refrigerator for carrying out the method Download PDFInfo
- Publication number
- EP0298416A2 EP0298416A2 EP88110692A EP88110692A EP0298416A2 EP 0298416 A2 EP0298416 A2 EP 0298416A2 EP 88110692 A EP88110692 A EP 88110692A EP 88110692 A EP88110692 A EP 88110692A EP 0298416 A2 EP0298416 A2 EP 0298416A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- door
- glazing
- refrigerator
- air
- circulation
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000009833 condensation Methods 0.000 claims description 9
- 230000005494 condensation Effects 0.000 claims description 9
- 238000000576 coating method Methods 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 4
- 239000011521 glass Substances 0.000 abstract description 3
- 239000003595 mist Substances 0.000 abstract description 2
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 238000005057 refrigeration Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
- A47F3/00—Show cases or show cabinets
- A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
- A47F3/0404—Cases or cabinets of the closed type
- A47F3/0426—Details
- A47F3/0434—Glass or transparent panels
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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
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/04—Preventing the formation of frost or condensate
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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
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
- F25B2600/112—Fan speed control of evaporator fans
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/02—Humidity
-
- 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
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/02—Sensors detecting door opening
Definitions
- the invention relates to a method for removing the inside, the transparency-impairing condensation fitting on the glazing of a refrigerator, which is cooled by forced air circulation and in which this fitting is formed with the door open.
- the invention also relates to a refrigerator unit for carrying out the method.
- Refrigerated cabinets such as refrigerated display cases set up in sales rooms, have at least one window through which the goods presented in the refrigerated cabinet are visible.
- the window is often embedded in the door of the refrigerator. Due to the low internal temperatures in the refrigerator, which can be between 10 ° C and -30 ° C, good thermal insulation of the glazing is necessary so that the required cooling capacity can be kept low.
- Highly insulating glazing generally consists of a multi-pane insulating glass, in which the spaces between the individual panes can be filled with certain gases and the panes can be provided with coatings. This enables heat transfer coefficients k of less than 2 W / m2K to be achieved.
- such glazing with a moderate k-value has, for example, a three-pane structure with two air gaps, each 6 mm wide, wherein the electrically heatable coating for preventing condensation is arranged on the side of the outer pane facing the air gap.
- the main reason for the prolongation of the fogging time is the different temperature difference between the inner pane and the interior of the refrigerator, which results when using glazing with a moderate k-value compared to glazing with a high k-value.
- the higher thermal resistance of the highly insulating glazing means that this temperature difference becomes smaller. This also reduces the difference in the corresponding water vapor partial pressures as the driving force for the degradation of the ice or water layer on the inner pane.
- the object of the invention is therefore to remove the inside condensation fitting formed on the glazing of the refrigeration cabinet when the door of a generic refrigeration cabinet is opened, without great expenditure on equipment and in an economical manner.
- the circulating speed of the air is increased to a value ensuring sufficient transparency of the glazing after the door is closed until the condensation fitting is dismantled, and that subsequently the circulating speed of the air is reduced again to the value required for normal cooling operation becomes.
- the speed of circulation of the air after closing the door can be increased to 1.5 to 4 times, preferably to 2.5 times, the value required for normal door operation.
- a refrigerator with at least one door and with glazing, in particular highly heat-insulating glazing, in the area of the door and / or wall, and with a blower for forced air circulation
- the refrigerator is characterized in that the blower is designed in two stages and by a switching device with a switch that can be activated when the door is closed is switched to the stage of increased circulation speed.
- the fan runs at the lower speed.
- the second stage of the fan is switched on, so that the fan runs at a higher speed, and accordingly the circulation speed of the air in the refrigerator is increased.
- the fan is switched back to the level corresponding to normal cooling operation.
- the point in time at which the blower is switched back on can be predetermined in that the switching device is a time relay which is set in accordance with the respective operating conditions.
- the described method can consequently be implemented without great expenditure on equipment. It is only necessary to equip the refrigerated cabinet in question with a 2-stage blower and an associated switching device, in the simplest case this switching device merely consisting of a timing relay. Particularly good results are obtained if the glazing of the refrigerated cabinet consists of a multi-pane insulating glass, the inner pane of which has an infrared reflection layer on the cold room side.
Landscapes
- Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Refrigerator Housings (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Entfernen des innenseitigen, die Transparenz beeinträchtigenden Kondensationsbeschlages auf der Verglasung eines Kühlmöbels, das durch Zwangsluftumwälzung gekühlt wird und bei dem dieser Beschlag sich bei geöffneter Tür bildet. Die Erfindung betrifft auch ein Kühlmöbel zur Durchführung des Verfahrens.The invention relates to a method for removing the inside, the transparency-impairing condensation fitting on the glazing of a refrigerator, which is cooled by forced air circulation and in which this fitting is formed with the door open. The invention also relates to a refrigerator unit for carrying out the method.
Kühlmöbel, wie z.B. in Verkaufsräumen aufgestellte Kühlvitrinen, besitzen zumindest ein Fenster, durch das die im Kühlmöbel präsentierte Ware sichtbar ist. Das Fenster ist häufig in die Tür des Kühlmöbels eingelassen. Wegen der niedrigen Innentemperaturen im Kühlmöbel, die zwischen 10° C und -30° C betragen können, ist eine gute Wärmeisolierung der Verglasung erförderlich, damit die benötigte Kühlleistung geringgehalten werden kann. Hochwärmedämmende Verglasungen bestehen in der Regel aus einem Mehrscheibenisolierglas, bei dem die Zwischenräume zwischen den einzelnen Scheiben mit bestimmten Gasen gefüllt und die Scheiben mit Beschichtungen versehen sein können. Damit lassen sich Wärmedurchgangskoeffizienten k von weniger als 2 W/m²K erreichen. Unter Wärmedurchgangskoeffizient k wird in diesem Zusammenhang die Wärmestromdichte, bezogen auf den Temperaturunterschied der beidseitig an die Verglasung angrenzenden Räume, verstanden. Für den Wärmedurchgangskoeffizienten sind dementsprechend drei Anteile zu berücksichtigen: der Anteil der Verglasung selbst und die Anteile der auf der warmen bzw. kalten Seite der Verglasung angrenzenden Luftschichten entsprechend der Beziehung
αa, αi = Wärmeübergangskoeffizienten nach außen bzw. innen bedeuten.Refrigerated cabinets, such as refrigerated display cases set up in sales rooms, have at least one window through which the goods presented in the refrigerated cabinet are visible. The window is often embedded in the door of the refrigerator. Due to the low internal temperatures in the refrigerator, which can be between 10 ° C and -30 ° C, good thermal insulation of the glazing is necessary so that the required cooling capacity can be kept low. Highly insulating glazing generally consists of a multi-pane insulating glass, in which the spaces between the individual panes can be filled with certain gases and the panes can be provided with coatings. This enables heat transfer coefficients k of less than 2 W / m²K to be achieved. In this context, the heat transfer coefficient k is understood to mean the heat flow density, based on the temperature difference of the rooms adjoining the glazing on both sides. Accordingly, three proportions must be taken into account for the heat transfer coefficient: the proportion of the glazing itself and the proportion of the air layers on the warm or cold side of the glazing according to the relationship
α a , α i = heat transfer coefficients mean outside or inside.
Bei der Angabe von k-Werten sind die Werte für die Wärmeübergangskoeffizienten entsprechend mittleren Bedingungen für eine vertikale Verglasung auf dem Bausektor auf αa = 23 W/m²K und αi = 8 W/m²K normiert.When specifying k values, the values for the heat transfer coefficients are standardized to α a = 23 W / m²K and α i = 8 W / m²K according to average conditions for vertical glazing in the construction sector.
Im folgenden beziehen sich alle Angaben von k-Werten auf diese genormten Randbedingungen. Es versteht sich dabei von selbst, daß in der Praxis bei Kühlvitrinen die tatsächlichen Werte davon geringfügig abweichen können. So wird der Wärmeübergangskoeffizient αa zwischen der Verglasung und dem umgebenden Raum u.a. von den Aufstellungsbedingungen und den vorliegenden Luftströmungen im Aufstellungsraum abhängen. Das gleiche gilt für den Wärmeübergangskoeffizienten zum Innenraum der Kühlvitrine αi. Auch er ist u.a. etwas abhängig von den Abmessungen der jeweiligen Kühlvitrine und ferner auch vom Grad der Zwangs-Luftumwälzung.In the following, all specifications of k values refer to these standardized boundary conditions. It goes without saying that in practice the actual values for refrigerated display cases may differ slightly. The heat transfer coefficient α a between the glazing and the surrounding room will depend, among other things, on the installation conditions and the existing air currents in the installation room. The same applies to the heat transfer coefficient to the interior of the refrigerated display case α i . It too is somewhat dependent on the dimensions of the respective refrigerated display case and also on the degree of forced air circulation.
Je besser die Wärmeisolierung der Verglasung ist, desto geringer ist die Gefahr, daß die Verglasung außenseitig beschlägt und dadurch die Sicht auf die im Kühlmöbel präsentierte Ware beeinträchtigt. Das liegt daran, daß bei Einsatz von hochwärmedämmenden Verglasungen mit kleinem k-Wert der Wärmetransport von der Außenseite zur Innenseite der Verglasung gering ist, und die Temperatur an der Außenseite der Verglasung sich nur wenig von der Umgebungstemperatur unterscheidet. - Bei Einsatz von Verglasungen mit mäßigem k-Wert ist vorgeschlagen worden, über die Außenseite der Verglasung einen Luftstrom mit Umgebungstemperatur zu leiten (DE-PS 21 58 147). In der Praxis wird die Außenseite der Verglasung beheizt. Solche Verglasungen mit mäßigem k-Wert haben in der Praxis z.B. einen dreischeibigen Aufbau mit zwei Luftzwischenräumen von je 6 mm Breite, wobei die elektrisch heizbare Beschichtung zur Verhinderung eines Kondensationsbeschlages auf der dem Luftzwischenraum zugewandten Seite der Außenscheibe angeordnet ist. Mit einem solchen Aufbau erhält man einen k-Wert von etwa 2,4 W/m²K.The better the thermal insulation of the glazing, the less there is a risk that the glazing will mist up on the outside and thereby impair the view of the goods presented in the refrigerator. This is because when using highly heat-insulating glazing with a small k value, the heat transfer from the outside to the inside of the glazing is low, and the temperature on the outside of the glazing differs only slightly from the ambient temperature. - When using glazing with a moderate k-value, it has been proposed to conduct an air stream with ambient temperature over the outside of the glazing (DE-PS 21 58 147). In practice, the outside of the glazing is heated. In practice, such glazing with a moderate k-value has, for example, a three-pane structure with two air gaps, each 6 mm wide, wherein the electrically heatable coating for preventing condensation is arranged on the side of the outer pane facing the air gap. With such a construction you get a k-value of about 2.4 W / m²K.
Wenn die Tür eines Kühlmöbels zur Entnahme einer Ware geöffnet wird, bildet sich aber auch auf der Innenseite der Verglasung ein Kondensationsbeschlag, der nach dem Schließen der Tür die Durchsicht durch die Verglasung beeinträchtigt. Dieser innenseitige Beschlag wird im Laufe der Zeit abgebaut. Das geschieht bei den üblichen Verglasungen mit k-Werten oberhalb von 2 W/m²K bei einer Öffnungszeit von 10 Sekunden etwa innerhalb einer Minute, wenn die relative Luftfeuchtigkeit bei etwa 65 % liegt. Bei den hochisolierenden Verglasungen erhöht sich diese Beschlagdauer erheblich. Sie liegt etwa bei einem Faktor von 2,5, wenn eine Verglasung mit einem k-Wert von 1 W/m²K eingesetzt wird.When the door of a refrigerator is opened to remove a product, a condensation fitting also forms on the inside of the glazing, which impairs the view through the glazing after the door has been closed. This inside fitting is dismantled over time. This happens with the usual glazing with k-values above 2 W / m²K with an opening time of 10 seconds approximately within one minute if the relative air humidity is around 65%. In the case of the highly insulating glazing, this duration of fogging increases considerably. It is around a factor of 2.5 if glazing with a k value of 1 W / m²K is used.
Um die Beschlagdauer zu verkürzen, ist es bekannt, die Innenseite der Verglasung bereits beim Öffnen der Tür elektrisch zu beheizen (GB-OS 21 31 143).In order to shorten the fitting time, it is known to heat the inside of the glazing electrically when the door is opened (GB-OS 21 31 143).
Man vermutet, daß die wesentliche Ursache für die Verlängerung der Beschlagdauer die unterschiedliche Temperaturdifferenz zwischen innerer Scheibe und dem Innenraum des Kühlmöbels ist, die sich bei Einsatz einer Verglasung mit mäßigem k-Wert gegenüber einer Verglasung mit hohem k-Wert ergibt. Der höhere Wärmedurchlaßwiderstand der hochwärmedämmenden Verglasung führt dazu, daß diese Temperaturdifferenz geringer wird. Damit reduziert sich auch der Unterschied in den entsprechenden Wasserdampfpartialdrücken als treibende Kraft für den Abbau der Eis- bzw. Wasserschicht auf der inneren Scheibe.It is believed that the main reason for the prolongation of the fogging time is the different temperature difference between the inner pane and the interior of the refrigerator, which results when using glazing with a moderate k-value compared to glazing with a high k-value. The higher thermal resistance of the highly insulating glazing means that this temperature difference becomes smaller. This also reduces the difference in the corresponding water vapor partial pressures as the driving force for the degradation of the ice or water layer on the inner pane.
Würde man bei einem solchen Kühlmöbel die Umwälzgeschwin digkeit erhöhen und damit über den konvektiven Anteil den Wärmeübergangskoeffizienten nach innen, αi, vergrößern, so würde die Temperaturdifferenz zwischen innerer Scheibe und Innenraum noch weiter abgebaut. Durch eine solche Vorgehensweise ist also keine Reduzierung der Beschlagdauer zu erwarten. Versuche haben dies bestätigt. Im übrigen ist auch unter dem Gesichtspunkt eines möglichst geringen Energiebedarfs für das Kühlmöbel die Verfolgung dieses Weges nicht sinnvoll, denn die durch den höheren αi Wert bedingte Verschlechterung des k-Wertes sowie die höhere Umlaufgeschwindigkeit des Ventilators für die Luftumwälzung erhöhen den Energiebedarf. Aus diesem Grunde wird die Luftumwälzgeschwindigkeit so weit reduziert, wie es für die notwendige Kühlung des Innenraums und dessen Temperaturvergleichmäßigung gerade notwendig ist. Bei Einsatz von hochwärmedämmenden Verglasungen kann diese notwendige Umwälzgeschwindigkeit der Luft etwas kleiner als bei Kühlmöbelverglasungen mit mäßigem k-Wert gewählt werden, weil der Energiebedarf insgesamt geringer ist.Would one with such a refrigerator the circulation speed increase and thus increase the heat transfer coefficient to the inside, α i , via the convective portion, the temperature difference between the inner pane and the interior would be reduced even further. Such a procedure is not expected to reduce the duration of the fogging. Tests have confirmed this. Otherwise, even from the point of view of the lowest possible energy requirement for the refrigeration cabinet, it is not sensible to follow this route, because the deterioration in the k value caused by the higher α i value and the higher circulation speed of the fan for air circulation increase the energy requirement. For this reason, the air circulation speed is reduced as much as is necessary for the necessary cooling of the interior and its temperature equalization. When using highly heat-insulating glazing, this necessary air circulation speed can be selected to be somewhat lower than with refrigeration unit glazing with a moderate k-value because the overall energy requirement is lower.
Aufgabe der Erfindung ist es deshalb, den beim Öffnen der Tür eines gattungsgemäßen Kühlmöbels gebildeten innenseitigen Kondensationsbeschlag an der Verglasung des Kühlmöbels ohne großen apparativen Aufwand und auf wirtschaftliche Art und Weise zu entfernen.The object of the invention is therefore to remove the inside condensation fitting formed on the glazing of the refrigeration cabinet when the door of a generic refrigeration cabinet is opened, without great expenditure on equipment and in an economical manner.
Diese Aufgabe wird dadurch gelöst, daß die Umwälzgeschwindigkeit der Luft nach dem Schließen der Tür bis zum Abbau des Kondensationsbeschlages auf einen eine ausreichende Transparenz der Verglasung gewährleistenden Wert erhöht wird, und daß nachfolgend die Umwälzgeschwindigkeit der Luft wieder auf den für den normalen Kühlbetrieb erforderlichen Wert reduziert wird. Insbesondere kann die Umwälzgeschwindigkeit der Luft nach dem Schließen der Tür auf das 1,5- bis 4-fache, vorzugsweise auf das 2,5-fache, des für den normalen Türbetrieb erforderlichen Wertes erhöht werden.This object is achieved in that the circulating speed of the air is increased to a value ensuring sufficient transparency of the glazing after the door is closed until the condensation fitting is dismantled, and that subsequently the circulating speed of the air is reduced again to the value required for normal cooling operation becomes. In particular, the speed of circulation of the air after closing the door can be increased to 1.5 to 4 times, preferably to 2.5 times, the value required for normal door operation.
Überraschenderweise hat sich gezeigt, daß eine solche, nur kurzzeitige Erhöhung der Umwälzgeschwindigkeit nach dem Schließen der Tür zu einer schnellen Entfernung des innenseitigen Beschlages führt. Die Zeit, die zwischen dem Schließen der Tür und der Entfernung des Beschlages vergeht, ist um wenigstens die Hälfte geringer als ohne diese Maßnahmen und liegt damit im Bereich derjenigen Zeit, die sich für den Abbau des innenseitigen Kondensationsbeschlages bei einer Verglasung mit mäßigem k-Wert ergibt. Aber auch bei einer Verglasung mit mäßigem k-Wert ist das erfindungsgemäße Verfahren vorteilhaft anwendbar. Auch hier bringt es eine Reduzierung der bisher hingenommenen Beschlagdauer um etwa 30 %.Surprisingly, it has been shown that such a brief increase in the circulation speed after the door is closed leads to a rapid removal of the inside fitting. The time that elapses between the closing of the door and the removal of the fitting is at least half less than without these measures and is therefore in the range of the time that is required for the dismantling of the condensation fitting on the inside with glazing with a moderate k value results. However, the method according to the invention can also be used advantageously in the case of glazing with a moderate k value. Here, too, there is a reduction in the previously accepted fitting duration by around 30%.
Zur Durchführung dieses Verfahrens eignet sich ein Kühlmöbel mit wenigstens einer Tür und mit Verglasungen, insbesondere hochwärmedämmenden Verglasungen, im Bereich der Tür und/oder Wandung sowie mit einem Gebläse für die Zwangsluftumwälzung, welches Kühlmöbel dadurch gekennzeichnet ist, daß das Gebläse zweistufig ausgebildet ist und von einer Schalteinrichtung mit einem beim Schließen der Tür aktivierbaren Schalter in die Stufe der erhöhten Umwälzgeschwindigkeit geschaltet wird. Während des normalen Kühlbetriebes läuft das Gebläse mit der niedrigeren Drehzahl. Nach dem Schließen der zwischenzeitlich geöffneten Tür wird die zweite Stufe des Gebläses eingeschaltet, so daß das Gebläse mit höherer Drehzahl läuft, und dementsprechend die Umwälzgeschwindigkeit der Luft im Kühlmöbel erhöht wird. Nach dem Entfernen des innenseitigen Beschlages wird das Gebläse wieder auf die dem normalen Kühlbetrieb entsprechende Stufe zurückgeschaltet.Suitable for carrying out this method is a refrigerator with at least one door and with glazing, in particular highly heat-insulating glazing, in the area of the door and / or wall, and with a blower for forced air circulation, which refrigerator is characterized in that the blower is designed in two stages and by a switching device with a switch that can be activated when the door is closed is switched to the stage of increased circulation speed. During normal cooling operation, the fan runs at the lower speed. After closing the door, which has been opened in the meantime, the second stage of the fan is switched on, so that the fan runs at a higher speed, and accordingly the circulation speed of the air in the refrigerator is increased. After removing the inside fitting, the fan is switched back to the level corresponding to normal cooling operation.
Der Zeitpunkt, an dem das Zurückschalten des Gebläses erfolgt, kann im einfachsten Fall dadurch vorgegeben werden, daß die Schalteinrichtung ein Zeitrelais ist, welches nach Maßgabe der jeweiligen Betriebsbedingungen eingestellt ist.In the simplest case, the point in time at which the blower is switched back on can be predetermined in that the switching device is a time relay which is set in accordance with the respective operating conditions.
Eine andere Möglichkeit, das Gebläse nach Entfernung des innenseitigen Kondensationsbeschlages wieder auf normalen Kühlbetrieb zurückzuschalten, ergibt sich dann, wenn innenseitig auf der Verglasung ein Feuchtigkeitsmesser angeordnet ist, der als Ist-Wert-Geber in einen die Schalteinrichtung beaufschlagenden Regelkreis geschaltet ist. Nachdem der Schalter durch das Schließen der Tür aktiviert worden ist und die zweite Stufe des Gebläses eingeschaltet hat, hält dieser Regelkreis die Schalteinrichtung solange in ihrer Schaltstellung, bis der Feuchtigkeitsmesser keine Anzeige mehr liefert. Dann schaltet die Schalteinrichtung wieder in den normalen Kühlbetrieb zurück.Another possibility of switching the blower back to normal cooling operation after removal of the condensation fitting on the inside arises if a moisture meter is arranged on the inside of the glazing, which is connected as an actual value transmitter into a control circuit acting on the switching device. After the switch has been activated by closing the door and the second stage of the fan has switched on, this control circuit holds the switching device in its switching position until the moisture meter no longer provides an indication. Then the switching device switches back to normal cooling operation.
Das beschriebene Verfahren läßt sich folglich ohne großen apparativen Aufwand verwirklichen. Es ist lediglich erforderlich, das betreffende Kühlmöbel mit einem 2-stufigen Gebläse und einer zugehörigen Schalteinrichtung auszurüsten, wobei diese Schalteinrichtung im einfachsten Fall lediglich aus einem Zeitrelais besteht. Besonders gute Ergebnisse erhält man, wenn die Verglasung des Kühlmöbels aus einem Mehrscheibenisolierglas besteht, dessen Innenscheibe kühlraumseitig eine Infrarotreflexionsschicht aufweist.The described method can consequently be implemented without great expenditure on equipment. It is only necessary to equip the refrigerated cabinet in question with a 2-stage blower and an associated switching device, in the simplest case this switching device merely consisting of a timing relay. Particularly good results are obtained if the glazing of the refrigerated cabinet consists of a multi-pane insulating glass, the inner pane of which has an infrared reflection layer on the cold room side.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT88110692T ATE89068T1 (en) | 1987-07-07 | 1988-07-05 | PROCEDURE FOR REMOVING THE INSIDE CONDENSATION MISTING ON THE GLAZING OF A REFRIGERATED CABINET THAT IMPAIRS TRANSPARENCY AND REFRIGERATED CABINET TO CARRY OUT THE PROCEDURE. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3722349 | 1987-07-07 | ||
| DE3722349A DE3722349C1 (en) | 1987-07-07 | 1987-07-07 | Process for removing the condensation fitting on the glazing of a refrigerator, which affects transparency, and refrigerator for carrying out the process |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0298416A2 true EP0298416A2 (en) | 1989-01-11 |
| EP0298416A3 EP0298416A3 (en) | 1990-04-04 |
| EP0298416B1 EP0298416B1 (en) | 1993-05-05 |
Family
ID=6331035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88110692A Expired - Lifetime EP0298416B1 (en) | 1987-07-07 | 1988-07-05 | Method of removing the transparency-impairing internal fog layer from refrigerator panes, and refrigerator for carrying out the method |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4827729A (en) |
| EP (1) | EP0298416B1 (en) |
| AT (1) | ATE89068T1 (en) |
| AU (1) | AU596062B2 (en) |
| DE (1) | DE3722349C1 (en) |
| ZA (1) | ZA884525B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2639424A1 (en) * | 1988-11-24 | 1990-05-25 | Salaberry Bernard De | Furniture for preserving products using cold |
| GB9509734D0 (en) * | 1995-05-13 | 1995-07-05 | Hussmann Europ Ltd | Refrigeration equipment |
| US5852284A (en) * | 1997-01-07 | 1998-12-22 | Libbey-Owens-Ford Co. | Insulating glass with capacitively coupled heating system |
| DK11498A (en) * | 1998-01-27 | 1999-07-28 | Caravell A S | Freezer with glass lid air dehumidification |
| JP2000088438A (en) * | 1998-09-09 | 2000-03-31 | Sanyo Electric Co Ltd | Cooling storage cabinet |
| EP1020149A3 (en) * | 1999-01-15 | 2000-11-02 | Isa SpA | Method to control refrigeration conditions of refrigerated modules and device to achieve said method |
| US6378324B1 (en) * | 1999-10-26 | 2002-04-30 | Crane Co. | Thermally regulated storage container |
| US6324853B1 (en) * | 2000-09-28 | 2001-12-04 | Spx Corporation | De-icing for low temperature refrigeration devices |
| US6722142B1 (en) | 2003-02-07 | 2004-04-20 | Sub-Zero Freezer Company, Inc. | Refrigerated enclosure |
| US8215921B2 (en) * | 2009-01-23 | 2012-07-10 | Rbc Manufacturing Corporation | Methods and systems for defogging transparent doors in display cases |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1129972B (en) * | 1960-07-05 | 1962-05-24 | Bbc Brown Boveri & Cie | Deep-freeze furniture with electrical resistance heating to avoid liquid condensation on the outside surface |
| US3307373A (en) * | 1965-10-22 | 1967-03-07 | John S Booth | Transparent refrigerator door control |
| US4009586A (en) * | 1975-02-03 | 1977-03-01 | Skvarenina John A | Method and apparatus for preventing condensation from forming about the periphery of a freezer door |
| US4203301A (en) * | 1979-02-16 | 1980-05-20 | Schaefer Corporation | Control circuit for refrigerator fan |
| US4361012A (en) * | 1980-05-01 | 1982-11-30 | Tyler Refrigeration Corporation | Energy efficient refrigerated merchandiser display case |
| GB2131143A (en) * | 1982-11-11 | 1984-06-13 | Bejam Group Plc | Preventing misting of refrigerated enclosure transparent doors |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2126665A5 (en) * | 1971-02-09 | 1972-10-06 | Detroit Sem Electromecca | |
| SE422711B (en) * | 1978-05-19 | 1982-03-22 | Frigoscandia Contracting Ab | SET TO REMOVE FROZEN COATING BATTERIES FROM COOL BATTERIES AND DEVICE IMPLEMENTATION |
| IT8521802V0 (en) * | 1985-05-14 | 1985-05-14 | Costan Spa | TANK-TYPE REFRIGERATOR COUNTER WITH TRANSPARENT FRONT WALL. |
| US4750335A (en) * | 1987-06-03 | 1988-06-14 | Hill Refrigeration Corporation | Anti-condensation means for glass front display cases |
-
1987
- 1987-07-07 DE DE3722349A patent/DE3722349C1/en not_active Expired
-
1988
- 1988-06-24 ZA ZA884525A patent/ZA884525B/en unknown
- 1988-07-05 EP EP88110692A patent/EP0298416B1/en not_active Expired - Lifetime
- 1988-07-05 AT AT88110692T patent/ATE89068T1/en not_active IP Right Cessation
- 1988-07-05 AU AU18703/88A patent/AU596062B2/en not_active Ceased
- 1988-07-07 US US07/216,591 patent/US4827729A/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1129972B (en) * | 1960-07-05 | 1962-05-24 | Bbc Brown Boveri & Cie | Deep-freeze furniture with electrical resistance heating to avoid liquid condensation on the outside surface |
| US3307373A (en) * | 1965-10-22 | 1967-03-07 | John S Booth | Transparent refrigerator door control |
| US4009586A (en) * | 1975-02-03 | 1977-03-01 | Skvarenina John A | Method and apparatus for preventing condensation from forming about the periphery of a freezer door |
| US4203301A (en) * | 1979-02-16 | 1980-05-20 | Schaefer Corporation | Control circuit for refrigerator fan |
| US4361012A (en) * | 1980-05-01 | 1982-11-30 | Tyler Refrigeration Corporation | Energy efficient refrigerated merchandiser display case |
| GB2131143A (en) * | 1982-11-11 | 1984-06-13 | Bejam Group Plc | Preventing misting of refrigerated enclosure transparent doors |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE89068T1 (en) | 1993-05-15 |
| AU1870388A (en) | 1989-01-12 |
| US4827729A (en) | 1989-05-09 |
| ZA884525B (en) | 1989-02-22 |
| EP0298416B1 (en) | 1993-05-05 |
| AU596062B2 (en) | 1990-04-12 |
| EP0298416A3 (en) | 1990-04-04 |
| DE3722349C1 (en) | 1988-04-07 |
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