EP2923162A1 - Refrigerating device, and method for operating a refrigerating device - Google Patents

Refrigerating device, and method for operating a refrigerating device

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Publication number
EP2923162A1
EP2923162A1 EP13795714.8A EP13795714A EP2923162A1 EP 2923162 A1 EP2923162 A1 EP 2923162A1 EP 13795714 A EP13795714 A EP 13795714A EP 2923162 A1 EP2923162 A1 EP 2923162A1
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EP
European Patent Office
Prior art keywords
evaporator
cooling
air
light
wavelength
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Granted
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EP13795714.8A
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German (de)
French (fr)
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EP2923162B1 (en
Inventor
Peter Immerath
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Individual
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Individual
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Priority to PL13795714T priority Critical patent/PL2923162T3/en
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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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • 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
    • F25D27/00—Lighting arrangements
    • F25D27/005—Lighting arrangements combined with control means

Definitions

  • the invention initially relates to a cooling device with a cooling space for receiving refrigerated goods, with at least one Verdam fer for cooling of the refrigerated goods
  • Refrigerator through the at least one evaporator and back into the refrigerator, with a fin heat exchanger on an inflow side of the at least one evaporator, through which the air flows into the at least one evaporator, and with a
  • Refrigerant by means of which the heat in the at least one evaporator heat is withdrawn and with a Irradiation Einseinichtung (14), by means of which blue light (wavelength ⁇ 420 to 490 nm) or red light (wavelength ⁇ 630 to 790 nm) can be generated.
  • the invention further relates to a method for operating such a cooling device.
  • the known cooling device consists essentially of a closed, usually both heat and air-insulated insulated refrigerator. At least one evaporator is mounted in the cooling space and at least one fan, which circulates the air in the cooling space and sucks or presses through the evaporator.
  • Evaporator can be a classic or a "flooded" evaporator.
  • the Applicant offers such cooling devices for the food industry
  • the evaporators are usually mounted under the ceiling of the refrigerator and placed there directly on fans that suck the air through the evaporator. Often, the vaporizer is laminated optically downwards by a suspended ceiling and the air forced.
  • Penicillium finds in these cooling devices a nearly ideal breeding ground from various deposited there carbohydrates:
  • the zu Cooling goods contain flour and can be dusted with it, embroidery cart for storage of dough pieces are dusted with starch to avoid sticking and in carton storage, the air contains the finest cellulose fibers.
  • Cellulose and starch are an ideal breeding ground for mold fungi.
  • the evaporator must be regularly defrosted - up to several times a day - to avoid permanent icing. The temporarily elevated temperature of the evaporator further stimulates the spread of any existing Penicillium infestation.
  • the Penicillium infestation of the lamellae is technically problematic in several respects: first, the mold moves the interstices of the lamellae and reduces the cooling capacity of the evaporator to complete failure, the other forms Penicillium as a metabolite of citric acid, the Aluminum attacks existing lamellae and can completely decompose.
  • Penicillium To limit the contamination with Penicillium, the known plants are regularly - usually at intervals of a few weeks - completely cleared and treated with very aggressive cleaning agents.
  • UV-C emitter wavelength ⁇ 100 to 280 nm
  • the invention has for its object to reduce the contamination of the cooling device with Penicillium.
  • Molds such. B. Aspergillus or Fusaria require significantly higher temperatures for their metabolism.
  • modern cooling device at normal operating temperatures almost all mold fungi of the genus Penicillium are prevented from growing and finally killed.
  • the irradiation device of a cooling device according to the invention preferably has at least one light-emitting diode (LED) for generating the light.
  • LED light-emitting diode
  • Diodes are particularly suitable for use in cooling devices, because they have a significantly lower energy consumption compared to other bulbs - and thus a lower heat development.
  • the wavelength ⁇ of the at least one LED is preferably adjustable in such an irradiation device.
  • the irradiation device with such a so-called "RGB LED” can - as an alternative to irradiation with blue light - take on other functions: For example, the irradiation device can be temporarily switched to red or green light, in which a possible infestation with mold fungi visually recognizable in the form of dark spots easily. Furthermore, the
  • Irradiation device to illuminate the cold room to be converted to white light.
  • the at least one LED is cast in a resin.
  • a large number of LEDs can be combined in a small space.
  • a cooling device has at least one measuring element, by means of which the wavelength of the light can be determined.
  • a change in the wavelength of the light can be detected, for example, by aging of the lighting means.
  • the wavelength ⁇ can be tracked automatically.
  • a cooling device advantageously additionally has at least one UV-A and / or UV-C light source.
  • Penicillium phosphoresces under UV-A light (wavelength ⁇ 315 to 380 nm, so-called "black light") and is thus particularly easy to recognize even with only a small infestation.
  • the effect of UV-C (as described above) is already Sterilization used.
  • the fin heat exchanger is irradiated with the blue or red light.
  • Such an inventive method can be with one of the above described
  • Run cooling devices according to the invention and is characterized by the advantages mentioned there.
  • the process according to the invention is food-compliant (tested according to CE and HACCP) and can effectively prevent mold fouling of new plants (cold rooms, cabinets, counters, gauges) and significantly lengthen the cleaning cycles.
  • the costs are compared to UV-C much lower, disadvantages such as strong heat radiation, very limited lifespan, health hazards of mishandling and risk of glass breakage do not occur.
  • the light has a
  • the selective frequency of such a method according to the invention stimulates certain protein molecules of the mold to vibrate.
  • the chosen frequency has a very strong effect on the metabolism and growth of mold all the way to
  • the air in the cooling space preferably has on average a temperature below 8 ° C. This is the typical work area of Applicants' refrigerators for use in the food industry, particularly for the storage and maturation of baked goods and their precursors.
  • the at least one evaporator is particularly preferably defrosted at least daily.
  • Fig. 1 shows a cooling device according to the invention
  • the cooling device 1 according to the invention shown in Figure 1 has a front wall 2, a rear wall 3, two side walls 4, a bottom 5 and a ceiling 6, which are each insulated in terms of heat and ventilation.
  • a door 7 is attached in the front wall 2, a door 7 is attached.
  • the cooling device 1 offers in a refrigerator 8, for example, parking space for up to three embroidery cart 9 for storage and maturation of dough pieces and for the storage of finished baked goods.
  • the refrigerator 6 limits upwards a suspended ceiling 10, above the one
  • the Evaporator 1 1 is attached.
  • the evaporator 11 has a fin heat exchanger 12 on and on its (not shown) Auströmseite three fans for circulating the air.
  • the air flow during operation of the cooling device 1 is indicated by arrows: The fans suck room air from the cooling chamber 6 on the front wall 2 of the cooling device 1 between the ceiling 6 and the suspended ceiling 10, and through the inflow side 13 of the fin heat exchanger 12 in the Evaporator 11 and then push the cooled air back to the rear wall 3 of the cooling device 1 in the cooling chamber. 6
  • the cooling device 1, an irradiation device 14, which is directed to irradiate the inflow side 13 of the evaporator 11 with blue light directly on the fins heat exchanger 12.
  • the irradiation device 14 has a housing 15 made of an extruded aluminum U-profile with a width 16 of 20 mm and a height 17 of 15 mm and a length 18 of 100 cm, into which a circuit board 19 is embedded. On the board 19, about one hundred RGB LEDs 20 are arranged in a row next to each other at a distance 21 of 10 mm.
  • a driver (not shown) for the LED 20 is further arranged with a pulse width modulation converter, which drives the LED 20 with the suitable for blue light with a wavelength ⁇ of 450.8 ⁇ 5 nm frequency.
  • the LED 20 can also be driven to emit white light.
  • a measuring element 22 here: a photocell with a peak at 460 nm is arranged on the circuit board 19 for the continuous monitoring of the wavelength of the blue light.
  • the circuit board 19, the LED 20 and the photocell are encapsulated with a synthetic resin with high breaking strength and optical quality.
  • the irradiation device 14 has a connecting cable 23 for connection to a not shown power supply with a
  • the irradiation device 14 has a power consumption of 8.5 Wm
  • Irradiation device LED with a fixed wavelength of 450 nm as well as individual UV-A and UV-C LEDs.
  • individual UV-A and UV-C LEDs are

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

The invention first relates to a refrigerating device (1) with a refrigerating compartment (6) for receiving products to be refrigerated, comprising: at least one evaporator (11) for cooling air flowing around the products to be refrigerated; at least one fan for circulating the air from the refrigerating compartment (6) through the at least one evaporator (11) and back into the refrigerating compartment (6); a finned heat exchanger (12) on an inlet side (13) of the at least one evaporator (11), the air flowing into the at least one evaporator (11) through said heat exchanger; a coolant, by means of which heat can be extracted from the air in the at least one evaporator (11); and an irradiating device (14) which can generate blue light (wavelength λ of 420 to 490 nm) or red light (wavelength λ of 630 to 790 nm). The invention further relates to a method for operating such a refrigerating device (1). In order to reduce the refrigerating device (1) being contaminated with Penicillium, the finned heat exchanger (12) is irradiated with the blue or red light.

Description

Kühlvorrichtung und Verfahren zum Betreiben einer Kühlvorrichtung  Cooling device and method for operating a cooling device
Die Erfindung betrifft zunächst eine Kühlvorrichtung mit einem Kühlraum zur Aufnahme von Kühlgut, mit mindestens einem Verdam fer zum Kühlen von das Kühlgut  The invention initially relates to a cooling device with a cooling space for receiving refrigerated goods, with at least one Verdam fer for cooling of the refrigerated goods
umströmender Luft, mit mindestens einem Lüfter zum Umwälzen der Luft aus dem circulating air, with at least one fan to circulate the air from the
Kühlraum durch den mindestens einen Verdampfer und zurück in den Kühlraum, mit einem Lamellenwärmetauscher auf einer Einströmseite des mindestens einen Verdampfers, durch den die Luft in den mindestens einen Verdampfer einströmt, und mit einem Refrigerator through the at least one evaporator and back into the refrigerator, with a fin heat exchanger on an inflow side of the at least one evaporator, through which the air flows into the at least one evaporator, and with a
Kältemittel, mittels dessen der Luft in dem mindestens einen Verdampfer Wärme entziehbar ist und mit einer Bestrahlungseiniichtung (14), mittels derer blaues Licht (Wellenlänge λ 420 bis 490 nm) oder rotes Licht (Wellenlänge λ 630 bis 790 nm) erzeugbar ist. Die Erfindung betrifft des Weiteren ein Verfahren zum Betreiben einer solchen Kühlvorrichtung. Refrigerant, by means of which the heat in the at least one evaporator heat is withdrawn and with a Irradiation Einseinichtung (14), by means of which blue light (wavelength λ 420 to 490 nm) or red light (wavelength λ 630 to 790 nm) can be generated. The invention further relates to a method for operating such a cooling device.
Derartige Kühlvorrichtungen und Verfahren zu deren Betrieb sind seit Jahrzehnten allgemein bekannt: Die bekannte Kühlvorrichtung besteht im Wesentlichen aus einem geschlossenen, meist sowohl wärme- als auch lufttechnisch isolierten Kühlraum. In dem Kühlraum ist mindestens ein Verdampfer angebracht und mindestens ein Lüfter, der die Luft in dem Kühlraum umwälzt und durch den Verdampfer saugt oder presst. Der Such cooling devices and methods for their operation are well known for decades: The known cooling device consists essentially of a closed, usually both heat and air-insulated insulated refrigerator. At least one evaporator is mounted in the cooling space and at least one fan, which circulates the air in the cooling space and sucks or presses through the evaporator. Of the
Verdampfer kann ein klassischer oder ein„gefluteter" Verdampfer sein. Evaporator can be a classic or a "flooded" evaporator.
Die Anmelderin bietet solche Kühlvorrichtungen für die Lebensmittelindustrie, The Applicant offers such cooling devices for the food industry,
insbesondere für die Lagerung und Reifung von Backwaren und deren Vorprodukten an. Die Verdampfer sind in der Regel unter der Decke des Kühlraums angebracht und dort unmittelbar auf Lüfter aufgesetzt, die die Luft durch die Verdampfer saugen. Häufig wird durch eine abgehängte Decke der Verdampfer nach unten optisch kaschiert und die Luft zwangsgeführt. especially for the storage and maturation of baked goods and their precursors. The evaporators are usually mounted under the ceiling of the refrigerator and placed there directly on fans that suck the air through the evaporator. Often, the vaporizer is laminated optically downwards by a suspended ceiling and the air forced.
In diesen Kühlvorrichtungen liegt die Lufttemperatur immer unterhalb von 8 °Cund je nach Einsatzzweck bei bis zu -38 °C. In diesem Temperaturbereich ist das Wachstum von Schimmelpilzen der Gattung Aspergillus praktisch unbedeutend, von Schimmel der Gattung Penicillium jedoch nur verlangsamt. In these coolers the air temperature is always below 8 ° C and, depending on the application, down to -38 ° C. In this temperature range, the growth of mold fungi of the genus Aspergillus is practically insignificant, but only slowed down by mold of the genus Penicillium.
An den Lamellen des Verdampfers findet Penicillium in diesen Kühlvorrichtungen einen nahezu idealen Nährboden aus verschiedenen dort abgelagerten Kohlehydraten: Die zu kühlenden Waren enthalten Mehl und können mit diesem bestäubt sein, Stickenwagen zur Lagerung von Teiglingen werden mit Stärke bestäubt, um ein Anhaften zu vermeiden und bei Kartonlagerung enthält die Luft feinste Zellulosefasem. Zellulose und Stärke sind für Schimmelpilze ein idealer Nährboden. Zudem müssen die Verdampfer regelmäßig - bis zu mehrmals täglich - abgetaut werden, um ein dauerhaftes Vereisen zu vermeiden. Die vorübergehend erhöhte Temperatur des Verdampfers regt die Ausbreitung eines eventuell bereits vorhandenen Penicillium-Befalls weiter an. At the fins of the evaporator Penicillium finds in these cooling devices a nearly ideal breeding ground from various deposited there carbohydrates: The zu Cooling goods contain flour and can be dusted with it, embroidery cart for storage of dough pieces are dusted with starch to avoid sticking and in carton storage, the air contains the finest cellulose fibers. Cellulose and starch are an ideal breeding ground for mold fungi. In addition, the evaporator must be regularly defrosted - up to several times a day - to avoid permanent icing. The temporarily elevated temperature of the evaporator further stimulates the spread of any existing Penicillium infestation.
Abgesehen von hygienischen Problemen ist der Penicillium-Befall der Lamellen auch technisch in mehrfacher Hinsicht problematisch: Zum Einen verlegt der Schimmel die Zwischenräume der Lamellen und vermindert die Kühlleistung der Verdampfer bis hin zum vollständigen Ausfall, zum Andern bildet Penicillium als Stoffwechselprodukt Citronensäure, die die aus Aluminium bestehenden Lamellen angreift und vollständig zersetzen kann. Apart from hygienic problems, the Penicillium infestation of the lamellae is technically problematic in several respects: first, the mold moves the interstices of the lamellae and reduces the cooling capacity of the evaporator to complete failure, the other forms Penicillium as a metabolite of citric acid, the Aluminum attacks existing lamellae and can completely decompose.
Um die Kontamination mit Penicillium zu begrenzen, werden die bekannten Anlagen regelmäßig - meist im Abstand von wenigen Wochen - vollständig ausgeräumt und mit sehr aggressiven Reinigungsmitteln behandelt. To limit the contamination with Penicillium, the known plants are regularly - usually at intervals of a few weeks - completely cleared and treated with very aggressive cleaning agents.
Aus US 5,321,907 A ist außerdem eine Kühlvorrichtung der vorgenannten Art bekannt, in der Gartenpflanzen mit rotem oder blauem Licht bestrahlt werden. From US 5,321,907 A also a cooling device of the aforementioned type is known, are irradiated in the garden plants with red or blue light.
Im Hintergrund der Erfindung sind beispielsweise von STERILSYSTEMS GmbH, In the background of the invention, for example, STERILSYSTEMS GmbH,
Sahburg/ AT Luftentkeimungsgeräte für lebensmitteltechnische Anlagen bekannt, in denen die Raumluft an einem UV-C-Strahler (Wellenlänge λ 100 bis 280 nm) vorbeigefuhrt wird, um Mikroorganismen wie Keime, Viren, Hefen und Schimmelsporen sicher zu Sahburg / AT Air sterilization equipment for food processing plants is known, in which the room air is passed by a UV-C emitter (wavelength λ 100 to 280 nm) to safely microorganisms such as germs, viruses, yeasts and mold spores
eliminieren. eliminate.
Weiterhin ist im Hintergrund der Erfindung aus Schmidt-Heydt et al : Infl ence oflight on food relevant fungi. Int. J. of Food Microbiology 145 (2011) 229-237 bekannt, dass das Bestrahlen von Lebensmitteln mit blauem oder rotem Licht das Wachstum von Penicillium drastisch reduziert. Insbesondere blockiert blaues Licht mit Wellenlänge λ 455 nm vollständig das Wachstum von P. verrucosum. JP2011142828A identifiziert als mögliche Ursache eine photo-sensitive Regulierung der Genexpression. Aufgabe Furthermore, in the background of the invention of Schmidt-Heydt et al: Infl ence of light on food relevant fungi. Int. J. of Food Microbiology 145 (2011) 229-237 discloses that irradiation of foods with blue or red light drastically reduces the growth of Penicillium. In particular, blue light with wavelength λ 455 nm completely blocks the growth of P. verrucosum. JP2011142828A identifies as a possible cause a photo-sensitive regulation of gene expression. task
Der Erfindung liegt die Aufgabe zugrunde, die Kontamination der Kühlvorrichtung mit Penicillium zu vermindern. The invention has for its object to reduce the contamination of the cooling device with Penicillium.
Lösung solution
Ausgehend von den bekannten Kühlvorrichtungen wird nach der Erfindung vorgeschlagen, dass mittels der Bestrahlungseinrichtung der Lamellen Wärmetauscher mit dem blauen oder roten Licht bestrahlbar ist. Blaues Licht - also Licht mit Wellenlängen zwischen 420 und 490 nm hemmt ebenso wie rotes Licht - also Licht mit Wellenlängen zwischen 630 und 790 nm - das Wachstum von Penicillium und vermindert so die Kontamination des Verdampfers: Unter der Bestrahlung kommt in einem auf den Lamellen bestehenden Bewuchs mit Penicillium der Stoffwechsel unmittelbar zum Stillstand. Der Bewuchs stirbt ab, ohne dass Sporen gebildet werden. Neuer Bewuchs entsteht nicht. Starting from the known cooling devices is proposed according to the invention that by means of the irradiation device of the fins heat exchanger with the blue or red light can be irradiated. Blue light - ie light with wavelengths between 420 and 490 nm as well as red light - ie light with wavelengths between 630 and 790 nm - inhibits the growth of Penicillium and thus reduces the evaporation of the evaporator: Under the irradiation comes in one on the slats Fungi growth with Penicillium immediately stops the metabolism. The vegetation dies without spores being formed. New vegetation does not arise.
Im für die Lebensmittelkühlung relevanten Temperaturbereich findet man fast nur In the temperature range relevant for the food cooling one finds almost only
Schimmelpilze der Gattung Penicillium. Diese wachsen zwischen +10 und -3 °C sehr gut. Bei Temperaturen bis zu -10 °C kann man noch Wachstum beobachten. Andere Mold fungi of the genus Penicillium. These grow very well between +10 and -3 ° C. At temperatures down to -10 ° C you can still observe growth. Other
Schimmelpilze, wie z. B. Aspergillus oder auch Fusarien benötigen für ihren Stoffwechsel deutlich höhere Temperaturen. In einer erfindungs gemäßen Kühlvorrichtung werden bei üblichen Betriebstemperaturen annähernd alle Schimmelpilze der Gattung Penicillium am Wachstum gehindert und schließlich abgetötet. Molds, such. B. Aspergillus or Fusaria require significantly higher temperatures for their metabolism. In a fiction, modern cooling device at normal operating temperatures almost all mold fungi of the genus Penicillium are prevented from growing and finally killed.
Bevorzugt weist die Bestrahlungseinrichtung einer erfindungsgemäßen Kühlvorrichtung mindestens eine Licht-emittierende Diode (LED) zum Erzeugen des Lichts auf. Dioden sind für den Einsatz in Kühlvorrichtungen besonders geeignet, weil sie gegenüber anderen Leuchtmitteln einen erheblich geringeren Energieverbrauch - und damit eine geringere Wärmeentwicklung - aufweisen. The irradiation device of a cooling device according to the invention preferably has at least one light-emitting diode (LED) for generating the light. Diodes are particularly suitable for use in cooling devices, because they have a significantly lower energy consumption compared to other bulbs - and thus a lower heat development.
Vorzugsweise ist in einer solchen Bestrahlungseinrichtung die Wellenlänge λ der mindestens einen LED einstellbar. Die Bestrahlungseinrichtung mit solchen sogenannten „RGB-LED" kann - alternativ zur Bestrahlung mit blauem Licht - weitere Funktionen übernehmen: Beispielsweise kann die Bestrahlungseinrichtung vorübergehend auf rotes oder grünes Licht umgestellt werden, in dem ein möglicher Befall mit Schimmelpilzen optisch in Form von dunklen Flecken leicht zu erkennen ist. Weiterhin kann die The wavelength λ of the at least one LED is preferably adjustable in such an irradiation device. The irradiation device with such a so-called "RGB LED" can - as an alternative to irradiation with blue light - take on other functions: For example, the irradiation device can be temporarily switched to red or green light, in which a possible infestation with mold fungi visually recognizable in the form of dark spots easily. Furthermore, the
Bestrahlungseinrichtung zur Beleuchtung des Kühlraums auf weißes Licht umgestellt werden. Irradiation device to illuminate the cold room to be converted to white light.
Besonders bevorzugt ist in einer LED-Bestrahlungseinrichtung einer erfindungsgemäßen Kühlvorrichtung die mindestens eine LED in ein Harz vergossen. So kann eine große Zahl von LED auf geringem Raum kombiniert werden. Particularly preferably, in an LED irradiation device of a cooling device according to the invention, the at least one LED is cast in a resin. Thus, a large number of LEDs can be combined in a small space.
In einer vorteilhaften Ausprägung weist eine erfindungsgemäße Kühlvorrichtung mindestens ein Messelement auf, mittels dessen die Wellenlänge des Lichts bestimmbar ist. In einer solchen erfindungsgemäßen Kühlvorrichtung kann eine Veränderung der Wellenlänge des Lichts beispielsweise durch Alterung der Leuchtmittel detektiert werden. Bei Verwendung einstellbarer LED kann die Wellenlänge λ automatisch nachgeführt werden. In an advantageous embodiment, a cooling device according to the invention has at least one measuring element, by means of which the wavelength of the light can be determined. In such a cooling device according to the invention, a change in the wavelength of the light can be detected, for example, by aging of the lighting means. When using adjustable LED, the wavelength λ can be tracked automatically.
Eine erfindungsgemäße Kühlvorrichtung weist vorteilhafter Weise zusätzlich mindestens eine UV-A- und/oder UV-C-Lichtquelle. Unter UV-A-Licht (Wellenlänge λ 315 bis 380 nm, sog.„Schwarzlicht") phosphoresziert Penicillium und ist so auch schon bei nur geringem Befall besonders leicht zu erkennen. Die Wirkung von UV-C wird (wie oben beschrieben) bereits zur Entkeimung eingesetzt. A cooling device according to the invention advantageously additionally has at least one UV-A and / or UV-C light source. Penicillium phosphoresces under UV-A light (wavelength λ 315 to 380 nm, so-called "black light") and is thus particularly easy to recognize even with only a small infestation.The effect of UV-C (as described above) is already Sterilization used.
Ausgehend von den bekannten Verfahren wird nach der Erfindung vorgeschlagen, dass der Lamellenwärmetauscher mit dem blauen oder roten Licht bestrahlt wird. Ein solches erfindungsgemäßes Verfahren lässt sich mit einer der oben beschriebenen Starting from the known method is proposed according to the invention that the fin heat exchanger is irradiated with the blue or red light. Such an inventive method can be with one of the above described
erfindungsgemäßen Kühlvorrichtungen ausführen und zeichnet sich durch die dort genannten Vorteile aus. Run cooling devices according to the invention and is characterized by the advantages mentioned there.
Das erfindungsgemäßen Verfahren ist lebensmittelkonform (nach CE und HACCP geprüft) und kann gerade bei Neuanlagen (Kühlzellen, -schränken, -theken, Gärautomaten) ein Verschimmeln der Verdampfer wirkungsvoll verhindern und die Reinigungszyklen deutlich verlängern. Die Kosten sind im Vergleich zu UV-C sehr viel niedriger, Nachteile wie starke Wärmeab Strahlung, sehr begrenzte Lebensdauer, Gesundheitsgefährdung bei falscher Handhabung und Gefahr des Glasbruchs treten nicht auf. Vorteilhafter Weise weist in einem erfindungsgemäßen Verfahren das Licht eine The process according to the invention is food-compliant (tested according to CE and HACCP) and can effectively prevent mold fouling of new plants (cold rooms, cabinets, counters, gauges) and significantly lengthen the cleaning cycles. The costs are compared to UV-C much lower, disadvantages such as strong heat radiation, very limited lifespan, health hazards of mishandling and risk of glass breakage do not occur. Advantageously, in a method according to the invention, the light has a
Wellenlänge λ von 450,8 ± 5 nm auf. In diesem Spektrum hemmt das blaue Licht das Wachstum von Penicillium nahezu vollständig. Wavelength λ of 450.8 ± 5 nm. In this spectrum, the blue light almost completely inhibits the growth of Penicillium.
Die selektive Frequenz eines solchen erfindungsgemäßen Verfahrens regt bestimmte Eiweißmoleküle des Schimmels zum Schwingen an. Die gewählte Frequenz hat eine sehr starke Wirkung auf Stoffwechsel und Wachstum der Schimmelpilze bis hin zum The selective frequency of such a method according to the invention stimulates certain protein molecules of the mold to vibrate. The chosen frequency has a very strong effect on the metabolism and growth of mold all the way to
Verkümmern und Absterben. Es wird vermutet, dass ein Genschalter des Schimmelpilzes umgelegt und dadurch das Wachstum verhindert wird, so dass der Schimmelpilz weder Sporen ausbilden noch Resistenzen entwickeln kann. Stunting and dying. It is believed that a gene switch of the mold is turned over and thereby prevents growth, so that the mold can neither form spores nor develop resistance.
Bevorzugt weist in einem erfindungsgemäßen Verfahren die Luft in dem Kühlraum im Mittel eine Temperatur unterhalb 8 °C auf. Dies ist der typische Arbeitsbereich der Kühlvorrichtungen der Anmelderin zur Verwendung in der Lebensmittelindustrie, insbesondere für die Lagerung und Reifung von Backwaren und deren Vorprodukten. In a method according to the invention, the air in the cooling space preferably has on average a temperature below 8 ° C. This is the typical work area of Applicants' refrigerators for use in the food industry, particularly for the storage and maturation of baked goods and their precursors.
Besonders bevorzugt wird in einem erfindungsgemäßen Verfahren der mindestens eine Verdampfer mindestens täglich abgetaut. So wird das dauerhafte Vereisen des In a method according to the invention, the at least one evaporator is particularly preferably defrosted at least daily. Thus, the permanent icing of the
Verdampfers wirksam vermieden. Evaporator effectively avoided.
Aus führungsb eispiel For example
Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels erläutert. Es zeigen The invention will be explained below with reference to an embodiment. Show it
Fig. 1 eine erfindungsgemäße Kühlvorrichtung und Fig. 1 shows a cooling device according to the invention and
Fig. 2 eine Bestrahlungseinrichtung der Kühlvorrichtung. 2 shows an irradiation device of the cooling device.
Die in Figur 1 gezeigte erfindungsgemäße Kühlvorrichtung 1 weist eine Vorderwand 2, eine Rückwand 3, zwei Seitenwände 4, einen Boden 5 und eine Decke 6 auf, die jeweils wärme- und lufttechnisch isoliert sind. In der Vorderwand 2 ist eine Tür 7 angebracht. Die Kühlvorrichtung 1 bietet in einem Kühlraum 8 beispielsweise Stellplatz für bis zu drei Stickenwagen 9 zur Lagerung und Reifung von Teiglingen und für die Lagerung von fertigen Backwaren. The cooling device 1 according to the invention shown in Figure 1 has a front wall 2, a rear wall 3, two side walls 4, a bottom 5 and a ceiling 6, which are each insulated in terms of heat and ventilation. In the front wall 2, a door 7 is attached. The cooling device 1 offers in a refrigerator 8, for example, parking space for up to three embroidery cart 9 for storage and maturation of dough pieces and for the storage of finished baked goods.
Den Kühlraum 6 begrenzt nach oben eine abgehängte Decke 10, über der ein The refrigerator 6 limits upwards a suspended ceiling 10, above the one
Verdampfer 1 1 angebracht ist. Der Verdampfer 11 weist einen Lamellenwärmetauscher 12 auf sowie auf seiner (nicht dargestellten) Auströmseite drei Lüfter zum Umwälzen der Luft. In der Zeichnungsfigur ist die Luftströmung im Betrieb der Kühlvorrichtung 1 durch Pfeile angedeutet: Die Lüfter saugen Raumluft aus dem Kühlraum 6 an der Vorderwand 2 der Kühlvorrichtung 1 zwischen die Decke 6 und die abgehängte Decke 10, und durch die Einströmseite 13 des Lamellenwärmetauschers 12 in den Verdampfer 11 und schieben die gekühlte Luft anschließend an der Rückwand 3 der Kühlvorrichtung 1 wieder in den Kühlraum 6. Evaporator 1 1 is attached. The evaporator 11 has a fin heat exchanger 12 on and on its (not shown) Auströmseite three fans for circulating the air. In the drawing figure, the air flow during operation of the cooling device 1 is indicated by arrows: The fans suck room air from the cooling chamber 6 on the front wall 2 of the cooling device 1 between the ceiling 6 and the suspended ceiling 10, and through the inflow side 13 of the fin heat exchanger 12 in the Evaporator 11 and then push the cooled air back to the rear wall 3 of the cooling device 1 in the cooling chamber. 6
Weiterhin weist die Kühlvorrichtung 1 eine Bestrahlungseinrichtung 14 auf, die zum Bestrahlen der Einströmseite 13 des Verdampfers 11 mit blauem Licht unmittelbar auf den Lamellen Wärmetauscher 12 gerichtet ist. Die Bestrahlungseinrichtung 14 weist ein Gehäuse 15 aus einem extrudierten U-Profil aus Aluminium mit einer Breite 16 von 20 mm und einer Höhe 17 von 15 mm und einer Länge 18 von 100 cm auf, in das eine Platine 19 eingelassen ist. Auf der Platine 19 sind rund hundert RGB -LED 20 in einer Reihe nebeneinander in einem Abstand 21 von 10 mm angeordnet.  Furthermore, the cooling device 1, an irradiation device 14, which is directed to irradiate the inflow side 13 of the evaporator 11 with blue light directly on the fins heat exchanger 12. The irradiation device 14 has a housing 15 made of an extruded aluminum U-profile with a width 16 of 20 mm and a height 17 of 15 mm and a length 18 of 100 cm, into which a circuit board 19 is embedded. On the board 19, about one hundred RGB LEDs 20 are arranged in a row next to each other at a distance 21 of 10 mm.
Auf der Platine 19 ist weiterhin ein (nicht dargestellter) Treiber für die LED 20 angeordnet mit einem Pulsweiten-Modulationswandler, der die LED 20 mit der für blaues Licht mit einer Wellenlänge λ von 450,8 ± 5 nm passenden Frequenz ansteuert. Über ein nicht dargestelltes Schaltelement können die LED 20 auch zum Emittieren von weißem Licht angesteuert werden. Weiterhin ist auf der Platine 19 ein Messelement 22 (hier: eine Fotozelle mit einem Peak bei 460 nm) zur fortlaufenden Kontrolle der Wellenlänge des blauen Lichts angeordnet. On the board 19, a driver (not shown) for the LED 20 is further arranged with a pulse width modulation converter, which drives the LED 20 with the suitable for blue light with a wavelength λ of 450.8 ± 5 nm frequency. About a non-illustrated switching element, the LED 20 can also be driven to emit white light. Furthermore, a measuring element 22 (here: a photocell with a peak at 460 nm) is arranged on the circuit board 19 for the continuous monitoring of the wavelength of the blue light.
Die Platine 19, die LED 20 und die Photozelle sind mit einem Kunstharz mit hoher Bruchfestigkeit und optischer Güte vergossen. Die Bestrahlungseinrichtung 14 weist ein Anschlusskabel 23 zum Anschließen an ein nicht dargestelltes Netzteil mit einer The circuit board 19, the LED 20 and the photocell are encapsulated with a synthetic resin with high breaking strength and optical quality. The irradiation device 14 has a connecting cable 23 for connection to a not shown power supply with a
Versorgungsspannung von 24 Fund einen durchgeschleiften Kontakt 24 zum Anschließen einer weiteren Bestrahlungseinrichtung 14 auf. Die Bestrahlungseinrichtung 14 weist eine Leistungsaufnahme von 8,5 Wm Supply voltage of 24 Fund on a looped contact 24 for connecting a further irradiation device 14 on. The irradiation device 14 has a power consumption of 8.5 Wm
In einem weiteren, nicht dargestellten Ausführungsbeispiel weist die In a further, not shown embodiment, the
Bestrahlungseinrichtung LED mit einer festen Wellenlänge von 450 nm auf, sowie einzelne UV-A- und UV-C-LED. In den Figuren sind Irradiation device LED with a fixed wavelength of 450 nm, as well as individual UV-A and UV-C LEDs. In the figures are
1 Kühlvorrichtung 1 cooling device
2 Vorderwand 2 front wall
3 Rückwand  3 rear wall
4 Seiten wand  4 sides wall
5 Boden  5 floor
6 Decke  6 ceiling
7 Tür  7 door
8 Kühlraum  8 refrigerator
9 Stickenwagen  9 embroidery cart
10 abgehängte Decke 10 suspended ceiling
1 1 Verdampfer 1 1 evaporator
12 Lamellenwärmetauscher 12 fin heat exchangers
13 Einströmseite 13 inflow side
14 Bestrahlungseinrichtung 14 irradiation device
15 Gehäuse 15 housing
16 Breite  16 width
17 Höhe  17 height
18 Länge  18 length
19 Platine  19 board
20 LED  20 LEDs
21 Abstand  21 distance
22 Messelement  22 measuring element
23 Anschlusskabel 23 connection cable
24 Kontakt 24 contact

Claims

Patentansprüche claims
1. Kühlvomchtung (1 ) mit einem Kühlraum (6) zur Aufnahme von Kühlgut, mit mindestens einem Verdampfer (11) zum Kühlen von das Kühlgut umströmender Luft, mit mindestens einem Lüfter zum Umwälzen der Luft aus dem Kühlraum (6) durch den mindestens einen Verdampfer (1 1) und zurück in den Kühlraum (6), mit einem Lamellenwärmetauscher (12) auf einer Einströmseite (13) des mindestens einen Verdampfers (11), durch den die Luft in den mindestens einen  1. Kühlvomchtung (1) with a cooling space (6) for receiving refrigerated goods, with at least one evaporator (11) for cooling air flowing around the refrigerated goods, with at least one fan for circulating the air from the cooling space (6) through the at least one Evaporator (1 1) and back into the cooling chamber (6), with a fin heat exchanger (12) on an inflow side (13) of the at least one evaporator (11), through which the air in the at least one
Verdampfer (11) einströmt, und mit einem Kältemittel, mittels dessen der Luft in dem mindestens einen Verdampfer (11) Wärme entziehbar ist, und mit einer Bestrahlungseinrichtung (14), mittels derer blaues Licht (Wellenlänge λ 420 bis 490 nm) oder rotes Licht (Wellenlänge λ 630 bis 790 nm) erzeugbar ist, dadurch gekennzeichnet, dass mittels der Bestrahlungseinrichtung (14) der  Evaporator (11) flows in, and with a refrigerant, by means of which the air in the at least one evaporator (11) heat is withdrawn, and with an irradiation device (14), by means of which blue light (wavelength λ 420 to 490 nm) or red light (Wavelength λ 630 to 790 nm) can be generated, characterized in that by means of the irradiation device (14) of the
Lamellen Wärmetauscher (12) mit dem blauen oder roten Licht bestrahlbar ist.  Slat heat exchanger (12) can be irradiated with the blue or red light.
2. Kühlvorrichtung (1) nach dem vorgenannten Anspruch, dadurch gekennzeichnet, dass die Bestrahlungseinrichtung (14) mindestens eine Licht-emittierende Diode (LED 20) zum Erzeugen des Lichts aufweist. 2. Cooling device (1) according to the preceding claim, characterized in that the irradiation device (14) has at least one light-emitting diode (LED 20) for generating the light.
3. Kühlvorrichtung (1) nach dem vorgenannten Anspruch, dadurch gekennzeichnet, dass die Wellenlänge λ der mindestens einen LED (20) einstellbar ist. 3. Cooling device (1) according to the preceding claim, characterized in that the wavelength λ of the at least one LED (20) is adjustable.
4. Kühlvorrichtung (1) nach einem der Ansprüche 2 bis 3, dadurch gekennzeichnet, dass die mindestens eine LED (20) in ein Harz vergossen ist. 4. Cooling device (1) according to one of claims 2 to 3, characterized in that the at least one LED (20) is cast in a resin.
5. Kühlvorrichtung (1) nach einem der vorgenannten Ansprüche, gekennzeichnet durch mindestens ein Messelement 22, mittels dessen die Wellenlänge des Lichts bestimmbar ist. 5. Cooling device (1) according to one of the preceding claims, characterized by at least one measuring element 22, by means of which the wavelength of the light can be determined.
6. Kühlvorrichtung (1 ) nach einem der vorgenannten Ansprüche, gekennzeichnet durch mindestens eine UV-A- und/oder UV-C-Lichtquelle. 6. Cooling device (1) according to one of the preceding claims, characterized by at least one UV-A and / or UV-C light source.
7. Verfahren zum Betreiben einer Kühlvorrichtung (1) mit einem Kühlraum (6) zur Aufnahme von Kühlgut und mit mindestens einem Verdam fer (11) zum Kühlen von das Kühlgut umströmender Luft, wobei mindestens ein Lüfter die Luft aus dem Kühlraum (6) durch den mindestens einen Verdampfer (11) und zurück in den Kühlraum (6) umwälzt, wobei die Luft auf einer Einströmseite (13) des mindestens einen Verdampfers (11) durch einen Lamellenwärmetauscher (12) in den mindestens einen Verdampfer (11) einströmt und die Luft in dem mindestens einen 7. A method for operating a cooling device (1) with a cooling space (6) for receiving refrigerated goods and with at least one verdam fer (11) for cooling the refrigerated goods umströmender air, wherein at least one fan, the air from the cooling chamber (6) the at least one evaporator (11) and back into the cooling chamber (6) circulates, wherein the air on an inflow side (13) of the at least one evaporator (11) through a fin heat exchanger (12) flows into the at least one evaporator (11) and the Air in the at least one
Verdampfer (11) Wärme an ein Kältemittel abgibt, und wobei in der  Evaporator (11) emits heat to a refrigerant, and wherein in the
Kühlvorrichtung (1) blaues Licht (Wellenlänge λ 420 bis 490 nm) oder rotes Licht (Wellenlänge λ 630 bis 790 nm) erzeugt wird, dadurch gekennzeichnet, dass der Lamellen Wärmetauscher (12) mit dem blauen oder roten Licht bestrahlt wird.  Cooling device (1) blue light (wavelength λ 420 to 490 nm) or red light (wavelength λ 630 to 790 nm) is generated, characterized in that the fin heat exchanger (12) is irradiated with the blue or red light.
8. Verfahren nach dem vorgenannten Ansprach, dadurch gekennzeichnet, dass das Licht eine Wellenlänge λ von 450,8 ± 5 nm aufweist.  8. The method according to the aforementioned spoke, characterized in that the light has a wavelength λ of 450.8 ± 5 nm.
9. Verfahren nach einem der Ansprüche 7 bis 8, dadurch gekennzeichnet, dass die Luft in dem Kühlraum (6) im Mittel eine Temperatur unterhalb 8 °C aufweist.  9. The method according to any one of claims 7 to 8, characterized in that the air in the cooling chamber (6) on average has a temperature below 8 ° C.
10. Verfahren nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass der mindestens eine Verdampfer (11) mindestens täglich abgetaut wird.  10. The method according to any one of claims 7 to 9, characterized in that the at least one evaporator (11) is defrosted at least daily.
EP13795714.8A 2012-11-23 2013-11-20 Cooling device and method for operating the same Active EP2923162B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13795714T PL2923162T3 (en) 2012-11-23 2013-11-20 Cooling device and method for operating the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012221471.2A DE102012221471B4 (en) 2012-11-23 2012-11-23 Cooling device and method for operating a cooling device
PCT/EP2013/074297 WO2014079892A1 (en) 2012-11-23 2013-11-20 Refrigerating device, and method for operating a refrigerating device

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EP2923162A1 true EP2923162A1 (en) 2015-09-30
EP2923162B1 EP2923162B1 (en) 2016-09-14

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EP (1) EP2923162B1 (en)
DE (1) DE102012221471B4 (en)
ES (1) ES2606836T3 (en)
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Publication number Priority date Publication date Assignee Title
JPH0534052A (en) * 1991-07-29 1993-02-09 Osaka Shosen Mitsui Senpaku Kk Method and device for storing garden plant
US6726341B2 (en) * 2001-10-12 2004-04-27 Koninklijke Philips Electronics N.V. LED illumination for cold storage compartments
ITPN20010050U1 (en) * 2001-12-19 2003-06-19 Electrolux Zanussi Elettrodome REFRIGERATOR WITH IMPROVED AIR PURIFICATION DEVICE.
EP2007231B1 (en) * 2006-04-11 2011-12-07 Lionel Scott Produce treatment method
KR100758208B1 (en) * 2006-07-03 2007-09-12 주식회사 대우일렉트로닉스 Refrigerator capable of photosynthesis function of vegetable and method for controlling the same
JP5359174B2 (en) * 2007-10-31 2013-12-04 パナソニック株式会社 refrigerator
JP5127418B2 (en) * 2007-11-27 2013-01-23 株式会社東芝 refrigerator
JP2010249427A (en) * 2009-04-16 2010-11-04 Mitsubishi Electric Corp Refrigerator
JP2011142828A (en) 2010-01-12 2011-07-28 Waseda Univ Photo-sensitive gene expression regulation system
WO2012149992A1 (en) * 2011-05-04 2012-11-08 Merck Patent Gmbh Device for preserving fresh goods

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WO2014079892A1 (en) 2014-05-30
DE102012221471A1 (en) 2014-05-28
ES2606836T3 (en) 2017-03-28
EP2923162B1 (en) 2016-09-14
DE102012221471B4 (en) 2014-06-26

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