EP1775035A1 - Self-cleaning exhaust hood and system for cleaning an exhaust hood - Google Patents

Self-cleaning exhaust hood and system for cleaning an exhaust hood Download PDF

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Publication number
EP1775035A1
EP1775035A1 EP05022478A EP05022478A EP1775035A1 EP 1775035 A1 EP1775035 A1 EP 1775035A1 EP 05022478 A EP05022478 A EP 05022478A EP 05022478 A EP05022478 A EP 05022478A EP 1775035 A1 EP1775035 A1 EP 1775035A1
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EP
European Patent Office
Prior art keywords
exhaust air
air chamber
detergent
cleaning
cleaning agent
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Granted
Application number
EP05022478A
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German (de)
French (fr)
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EP1775035B1 (en
Inventor
Gerhard Höpfl
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Suedluft Systemtechnik & Co KG GmbH
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Suedluft Systemtechnik & Co KG GmbH
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Priority to EP05022478.1A priority Critical patent/EP1775035B1/en
Priority to PL05022478T priority patent/PL1775035T3/en
Publication of EP1775035A1 publication Critical patent/EP1775035A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2057—Removing cooking fumes using a cleaning liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area

Definitions

  • the invention relates to an exhaust chamber for venting closed spaces, with at least one spray nozzle mounted inside the exhaust chamber for spraying at least a portion of the exhaust chamber with a detergent, and a retrofit cleaning system for an exhaust chamber.
  • exhaust air chambers such as extractor hoods it comes with time to precipitation of impurities such as cooking fat or other organic exhaust air components. These contaminants are not only unhygienic but also lead to increased risk of fire inside the exhaust chamber and must therefore be removed regularly.
  • the inner areas of exhaust air chambers are often difficult to access and can only be cleaned by hand without disassembly.
  • hoods in which hot water is sprayed as a cleaning agent inside the hood by integrated spray nozzles from time to time to solve impurities and wegzuschwemmen.
  • this type of cleaning is not very efficient, especially with fatty deposits.
  • a retrofit cleaning system for Exhaust air chambers are specified, which allows effective cleaning.
  • the exhaust air chamber which serves for venting closed spaces, has a cleaning agent supply line and at least one spray nozzle mounted in the interior of the exhaust air chamber, which serves for spraying at least one area of the exhaust air chamber with a cleaning agent.
  • the at least one spray nozzle is connected via the detergent feed line to a metering unit for metered introduction of the cleaning agent, which has an inlet opening for preferably microbiologically active cleaning agent.
  • the exhaust air chamber can be sprayed inside with a microbiologically active cleaning agent, which degrades organic deposits and thus completely removed without mechanical action.
  • a microbiologically active cleaning agent which degrades organic deposits and thus completely removed without mechanical action.
  • the targeted application of microbiological cultures eliminates cover or disassembly work for regular cleaning of the exhaust chamber.
  • the dosing unit preferably contains a dosing agent pump.
  • the detergent can be well dosed and can be promoted in a simple manner from a detergent reservoir to the spray nozzle.
  • a detergent canister for microbiologically active detergent is provided in which projects into the inlet opening.
  • the detergent can be easily refilled.
  • a level indicator for indicating the cleaning agent level is provided in the detergent canister, over which the level is easily monitored and in good time before the detergent is empty, an alarm can be triggered.
  • the spray nozzle is designed as a mist nozzle, which generates a finely divided spray.
  • the exhaust chamber is evenly wetted.
  • a programmable control unit which serves to activate the dosing unit during preprogrammable time cycles.
  • the exhaust air chamber can be cleaned automatically at regular cleaning intervals, for example, before the start of operation or after the end of the operation.
  • the controlled wetting of the exhaust air chamber with cleaning agent reduces the consumption of cleaning agent, which leads to lower operating costs.
  • dosing unit, detergent canister and control unit are accommodated in a closed, compact technical cabinet.
  • the hygiene regulations applicable in the commercial kitchen sector can be easily adhered to.
  • the exhaust chamber is expediently provided with a preferably automatic drain cock, which is connected to a drain and used for the discharge of accumulating dirty water.
  • the exhaust air chamber is formed as a connected to a suction hood extractor hood and has an aerosol.
  • the spray nozzle is arranged in such a way that the suction channel, aerosol separator and suction chamber of the extractor hood are evenly wetted with cleaning agent.
  • the spray nozzle and a portion of the cleaning agent supply line arranged within the exhaust air chamber are preferably made of a chromium nickel steel. They are very easy to clean and do not cause a fire inside the exhaust chamber.
  • the hood on a recessed in the hood body low-voltage control panel.
  • the operating panel can be used to monitor the cleaning cycles well.
  • a cleaning system which can be installed in installed exhaust air chambers. It comprises a detergent feed line and at least one spray nozzle, which is mounted inside the exhaust air chamber to spray at least a portion of the exhaust chamber with a cleaning agent. With the at least one spray nozzle, a dosing unit is connected via the detergent supply line, which serves for the metered introduction of the detergent and which has an inlet opening for preferably microbiologically active cleaning agent.
  • FIG. 1 shows a cooker hood 20 installed in a commercial kitchen in a schematic longitudinal section.
  • the extractor hood 20 is mounted above a cooking area 10 to carry away emerging steam from the kitchen during cooking. For this purpose, it is connected to a provided with a fan suction channel 21, which leads to the outside (indicated by an arrow).
  • two spray nozzles 25 are attached, which are connected to a detergent supply line 24. Via these spray nozzles 24, a microbiologically active cleaning agent can be sprayed into the suction chamber of the extractor hood.
  • Microbiologically active cleaning agents are known per se. They contain special microorganisms, such as bacteria or other microcultures, which are able to break down organic contaminants, such as fatty and oily deposits, into water and carbon dioxide. Microbiological active cleaning agents are harmless and represent a particularly environmentally friendly method of purification. The microorganisms contained therein do not pollute the environment but continue to provide useful services in sewage treatment plants and bodies of water. In addition, such detergents are compatible with materials and cause no corrosion or embrittlement of material and / or seals. An example of such a cleaning agent that can be used with the described hood is the product "Microclean Hood" from WT-Cleancorp.
  • a metering unit 32 is connected, which delivers the detergent metered to the spray nozzles 25. Via a suction line 34, the metering unit 32 is connected to a detergent canister 33.
  • the metering device contains a metering pump. This promotes via the suction line 34, which projects into the detergent canister 33, small amounts of the detergent under pressure to the two spray nozzles 25.
  • the metering pump delivers about 5 ml of detergent per m 2 to be cleaned surface of the hood.
  • the metering device 32 can also be realized with a metering valve and a compressor which permanently pressurizes the detergent container 33, so that upon brief opening of the metering valve an intended amount of the detergent from the detergent container 33 under pressure in the detergent supply line 24 up to the spray nozzles 25 rises.
  • the detergent canister 33 can either be permanently installed and provided for external refilling or it can be the standardized one supplied by the manufacturer of the microbiologically active cleaning agent Disposable canisters are used, in which then simply a hose end of the intake pipe 34 is inserted.
  • the spray nozzles 25 are designed as mist nozzles, so that the under pressure promoted cleaning agent is finely atomized and the extractor hood 20 wets evenly inside.
  • an emptying tap 22 is attached, which leads via a discharge line 23 into an on-site drain 15.
  • a discharge line 23 into an on-site drain 15.
  • the drain cock 22 which accumulates small amounts of dirty water and excess detergent, which accumulates in a collecting trough at the bottom of the hood, be discharged into the drain.
  • the drain valve is automated, so that accumulating liquid quantities are regularly discharged automatically.
  • a programmable control unit 35 is provided.
  • the control unit 35 ensures that the cleaning of the extractor hood 20 runs fully automatically. To do this, it activates the dosing unit at pre-programmed times. In this way, cleaning intervals that occur in preprogrammed time cycles can be defined, for example, daily after the end of operation or before the start of operation. In addition, it makes sense to let the cooker hood run for about 5 minutes after spraying, so that excess detergent mist is sucked off. This may also be advantageously controlled by the control unit 35 by forcibly turning on the fan of the extractor hood during each cleaning. Of course, the cleaning can also be carried out manually via the control unit 35, It is also advantageous here to force the fan via the control unit.
  • a low-voltage control panel 28 is still installed in the hood body of the hood 20. In addition to easy operation via corresponding control buttons, it enables continuous monitoring of the cleaning cycles and indicates possible malfunctions. In addition, it contains a level indicator for the detergent canister 33 and generates an alarm when the detergent is about to run low.
  • the dosing unit, the detergent container and the control unit are housed in a compact and hygienic technical cabinet with common power connection 36.
  • the cleaning agent supply line 24 between the extractor hood and the technical cabinet is a flexible hose line, which enables easy installation.
  • detergent feed line 24 and spray nozzles 25 are made of stainless steel, for example chrome-nickel steel, in order to achieve good cleaning results and to reduce the risk of fire.
  • FIG. 2 shows a schematic cross section through the extractor hood 20.
  • the extractor hood has an aerosol separator 26, behind which the spray nozzles 25 are arranged at a distance of approximately 50 cm.
  • a lighting device 27 is integrated in the extractor hood.
  • the aerosol separator is a permanent filter that serves to trap grease and dirt particles contained in the extracted fumes. He exists in Embodiment of maze-like interleaved baffles made of stainless steel and a filter arranged behind stainless steel braid. On the cold metal, grease fumes and dirt particles stick to the large surface.
  • the modular design makes it easy to retrofit existing cooker hoods with the cleaning system.
  • the stainless steel supply line is installed with the spray nozzles only within the hood and connected via the flexible supply line of the external technical cabinet with the required for operation integrated control and regulation, metering pump and detergent container.
  • the cleaning system can not only be installed in extractor hoods, but is suitable for all types of commercial exhaust air chambers, such as counter hoods, grill hoods, trapeze hoods or trapezoidal ducts.

Abstract

The outgoing air chamber (20) has a cleaning fluid line (24) and at least one spray nozzle (25) inside it to spray at least one region of the chamber with cleaning fluid. This nozzle is connected via the cleaning fluid line to a dosing unit (32) for dosing the fluid, which has an inlet aperture (34) for a microbiologically active cleaning fluid.

Description

Die Erfindung betrifft eine Abluftkammer zum Entlüften geschlossener Räume, mit mindestens einer im Inneren der Abluftkammer angebrachten Sprühdüse zum Besprühen mindestens eines Bereiches der Abluftkammer mit einem Reinigungsmittel, sowie ein nachrüstbares Reinigungssystem für eine Abluftkammer.The invention relates to an exhaust chamber for venting closed spaces, with at least one spray nozzle mounted inside the exhaust chamber for spraying at least a portion of the exhaust chamber with a detergent, and a retrofit cleaning system for an exhaust chamber.

In Abluftkammern wie beispielsweise Dunstabzugshauben kommt es mit der Zeit zu Niederschlag von Verunreinigungen wie Bratfett oder anderen organischen Abluftbestandteilen. Diese Verunreinigungen sind nicht nur unhygienisch sondern führen auch zu erhöhter Brandgefahr im Inneren der Abluftkammer und müssen daher regelmäßig entfernt werden. Die inneren Bereiche von Abluftkammern sind aber häufig schlecht zugänglich und können nur schwerlich ohne Demontage von Hand gereinigt werden.In exhaust air chambers such as extractor hoods it comes with time to precipitation of impurities such as cooking fat or other organic exhaust air components. These contaminants are not only unhygienic but also lead to increased risk of fire inside the exhaust chamber and must therefore be removed regularly. The inner areas of exhaust air chambers are often difficult to access and can only be cleaned by hand without disassembly.

Bekannt sind Dunstanzugshauben, bei denen durch integrierte Sprühdüsen von Zeit zu Zeit heißes Wasser als Reinigungsmittel ins Innere der Dunstabzugshaube gesprüht wird, um Verunreinigungen zu lösen und fortzuschwemmen. Diese Art der Reinigung ist aber insbesondere bei fetthaltigen Ablagerungen wenig effizient.Known are hoods in which hot water is sprayed as a cleaning agent inside the hood by integrated spray nozzles from time to time to solve impurities and wegzuschwemmen. However, this type of cleaning is not very efficient, especially with fatty deposits.

Es ist daher eine Aufgabe der vorliegenden Erfindung, eine Abluftkammer mit integriertem Reinigungssystem anzugeben, bei der eine wirkungsvollere Reinigung möglich ist. Außerdem soll ein nachrüstbares Reinigungssystem für Abluftkammern angegeben werden, welches eine wirkungsvolle Reinigung ermöglicht.It is therefore an object of the present invention to provide an exhaust chamber with integrated cleaning system, in which a more effective cleaning is possible. In addition, a retrofit cleaning system for Exhaust air chambers are specified, which allows effective cleaning.

Die Aufgabe wird bezüglich der Abluftkammer gelöst durch die Merkmale des Anspruch 1 und bezüglich des Reinigungssystems durch die Merkmale des Anspruchs 12. Vorteilhafte Ausgestaltungen sind in den abhängigen Ansprüchen angegeben.The object is achieved with respect to the exhaust air chamber by the features of claim 1 and with respect to the cleaning system by the features of claim 12. Advantageous embodiments are specified in the dependent claims.

Die Abluftkammer, die zum Entlüften geschlossener Räume dient, weist eine Reinigungsmittelzuleitung und mindestens eine im Inneren der Abluftkammer angebrachte Sprühdüse auf, die zum Besprühen mindestens eines Bereiches der Abluftkammer mit einem Reinigungsmittel dient. Erfindungsgemäß ist die mindestens eine Sprühdüse über die Reinigungsmittelzuleitung mit einer Dosiereinheit zur dosierten Einleitung des Reinigungsmittels verbunden, die eine Einlaßöffnung für vorzugsweise mikrobiologisch aktives Reinigungsmittel aufweist.The exhaust air chamber, which serves for venting closed spaces, has a cleaning agent supply line and at least one spray nozzle mounted in the interior of the exhaust air chamber, which serves for spraying at least one area of the exhaust air chamber with a cleaning agent. According to the invention, the at least one spray nozzle is connected via the detergent feed line to a metering unit for metered introduction of the cleaning agent, which has an inlet opening for preferably microbiologically active cleaning agent.

Dadurch kann die Abluftkammer im Inneren mit einem mikrobiologisch aktiven Reinigungsmittel ausgesprüht werden, welches organische Ablagerungen abbaut und somit ohne mechanische Einwirkung restlos entfernt. Durch die gezielte Ausbringung der mikrobiologischen Kulturen entfallen Abdeckungs- oder Demontagearbeiten zur regelmäßigen Reinigung der Abluftkammer.As a result, the exhaust air chamber can be sprayed inside with a microbiologically active cleaning agent, which degrades organic deposits and thus completely removed without mechanical action. The targeted application of microbiological cultures eliminates cover or disassembly work for regular cleaning of the exhaust chamber.

Die Dosiereinheit enthält vorzugsweise eine Dosiermittelpumpe. Dadurch läßt sich das Reinigungsmittel gut dosieren und kann auf einfache Weise aus einem Reinigungsmittelreservoir zur Sprühdüse gefördert werden.The dosing unit preferably contains a dosing agent pump. As a result, the detergent can be well dosed and can be promoted in a simple manner from a detergent reservoir to the spray nozzle.

Zweckmäßig ist ein Reinigungsmittelkanister für mikrobiologisch aktives Reinigungsmittel vorgesehen, in den die Einlaßöffnung hineinragt. In einen Reinigungsmittelkanister kann das Reinigungsmittel leicht nachgefüllt werden.Suitably, a detergent canister for microbiologically active detergent is provided in which projects into the inlet opening. In a detergent canister, the detergent can be easily refilled.

Vorteilhaft ist eine Füllstandsanzeige zur Anzeige des Reinigungsmittelstandes im Reinigungsmittelkanister vorgesehen, über die der Füllstand einfach überwacht und rechtzeitig bevor das Reinigungsmittel leer ist ein Alarm ausgelöst werden kann.Advantageously, a level indicator for indicating the cleaning agent level is provided in the detergent canister, over which the level is easily monitored and in good time before the detergent is empty, an alarm can be triggered.

Vorzugsweise ist die Sprühdüse als Nebeldüse ausgebildet, die einen feinverteilten Sprühnebel erzeugt. Mit einem feinverteilten Sprühnebel wird die Abluftkammer gleichmäßig benetzt. Dadurch kann mikrobiologisch aktives Reinigungsmittel besonders wirksam und sparsam eingesetzt werden.Preferably, the spray nozzle is designed as a mist nozzle, which generates a finely divided spray. With a finely divided spray, the exhaust chamber is evenly wetted. As a result, microbiologically active cleaning agent can be used particularly effectively and economically.

Bei einer Weiterbildung der Erfindung ist eine programmierbare Steuereinheit vorgesehen, die zur Aktivierung der Dosiereinheit während vorprogrammierbarer Zeitzyklen dient. Dadurch kann die Abluftkammer in regelmäßigen Reinigungsintervallen beispielsweise vor Betriebsbeginn oder nach Betriebsende automatisch gereinigt werden. Durch die gesteuerte Benetzung der Abluftkammer mit Reinigungsmittel wird der Reinigungsmittelverbrauch reduziert, was zu niedrigeren Betriebkosten führt.In a development of the invention, a programmable control unit is provided which serves to activate the dosing unit during preprogrammable time cycles. As a result, the exhaust air chamber can be cleaned automatically at regular cleaning intervals, for example, before the start of operation or after the end of the operation. The controlled wetting of the exhaust air chamber with cleaning agent reduces the consumption of cleaning agent, which leads to lower operating costs.

Vorteilhaft sind Dosiereinheit, Reinigungsmittelkanister und Steuereinheit in einem abgeschlossenen, kompakten Technikschrank untergebracht. Dadurch können die im gewerblichen Küchenbereich geltenden Hygienevorschriften einfach eingehalten werden.Advantageously, dosing unit, detergent canister and control unit are accommodated in a closed, compact technical cabinet. As a result, the hygiene regulations applicable in the commercial kitchen sector can be easily adhered to.

Die Abluftkammer ist zweckmäßig mit einem vorzugsweise automatischen Entleerhahn versehen, der an einen Ablauf angeschlossen wird und zur Ableitung von anfallendem Schmutzwasser dient. Dadurch kann das in geringen Mengen anfallende Schmutzwasser auf einfache Weise in den bauseitigen Abwasserkanal abgeleitet werden.The exhaust chamber is expediently provided with a preferably automatic drain cock, which is connected to a drain and used for the discharge of accumulating dirty water. As a result, the resulting waste water in small amounts can be easily discharged into the on-site sewer.

Bei einer bevorzugten Ausführungsform ist die Abluftkammer als eine mit einem Absaugkanal verbundene Dunstabzugshaube ausgebildet und weist einen Aerosolabscheider auf. Die Sprühmitteldüse ist derart angeordnet, daß Absaugkanal, Aerosolabscheider und Absaugraum der Dunstabzugshaube gleichmäßig mit Reinigungsmittel benetzt werden.In a preferred embodiment, the exhaust air chamber is formed as a connected to a suction hood extractor hood and has an aerosol. The spray nozzle is arranged in such a way that the suction channel, aerosol separator and suction chamber of the extractor hood are evenly wetted with cleaning agent.

Die Sprühdüse sowie ein innerhalb der Abluftkammer angeordneter Abschnitt der Reinigungsmittelzuleitung sind vorzugsweise aus einem Chromnickelstahl hergestellt. Sie lassen sich so besonders gut reinigen und stellen keinen Brandherd innerhalb der Abluftkammer dar.The spray nozzle and a portion of the cleaning agent supply line arranged within the exhaust air chamber are preferably made of a chromium nickel steel. They are very easy to clean and do not cause a fire inside the exhaust chamber.

Zur einfachen Bedienung weist die Dunstabzugshaube ein im Haubenkörper eingelassenes Niedervolt-Bedientableau auf. Über das Bedientableau können die Reinigungszyklen gut überwacht werden.For easy operation, the hood on a recessed in the hood body low-voltage control panel. The operating panel can be used to monitor the cleaning cycles well.

Gemäß einem weiteren Aspekt der Erfindung wird ein Reinigungssystem angegeben, welches in installierte Abluftkammern eingebaut werden kann. Es umfaßt eine Reinigungsmittelzuleitung und mindestens eine Sprühdüse, die im Inneren der Abluftkammer angebracht wird um mindestens einen Bereich der Abluftkammer mit einem Reinigungsmittel zu besprühen. Mit der mindestens einen Sprühdüse ist über die Reinigungsmittelzuleitung eine Dosiereinheit verbindbar, die zur dosierten Einleitung des Reinigungsmittels dient und die eine Einlaßöffnung für vorzugsweise mikrobiologisch aktives Reinigungsmittel aufweist.According to a further aspect of the invention, a cleaning system is provided, which can be installed in installed exhaust air chambers. It comprises a detergent feed line and at least one spray nozzle, which is mounted inside the exhaust air chamber to spray at least a portion of the exhaust chamber with a cleaning agent. With the at least one spray nozzle, a dosing unit is connected via the detergent supply line, which serves for the metered introduction of the detergent and which has an inlet opening for preferably microbiologically active cleaning agent.

Im folgenden wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnungen näher erläutert. Es zeigen:

Figur 1
eine schematische Frontansicht einer Dunstabzugshaube im Schnitt und
Figur 2
eine schematische Seitenansicht der Dunstabzugshaube im Schnitt.
In the following an embodiment of the invention will be explained in more detail with reference to the drawings. Show it:
FIG. 1
a schematic front view of an extractor hood in section and
FIG. 2
a schematic side view of the hood in section.

In Figur 1 ist eine in einer gewerblichen Küche installierte Dunstabzugshaube 20 in einem schematischen Längsschnitt dargestellt. Die Dunstabzugshaube 20 ist über einer Kochstelle 10 angebracht, um beim Kochen entstehende Dünste aus der Küche abzutransportieren. Zu diesem Zweck ist sie an einen mit einem Lüfter versehenen Absaugkanal 21 angeschlossen, der ins Freie führt (durch einen Pfeil angedeutet).FIG. 1 shows a cooker hood 20 installed in a commercial kitchen in a schematic longitudinal section. The extractor hood 20 is mounted above a cooking area 10 to carry away emerging steam from the kitchen during cooking. For this purpose, it is connected to a provided with a fan suction channel 21, which leads to the outside (indicated by an arrow).

Innerhalb der Dunstabzugshaube sind zwei Sprühdüsen 25 angebracht, die an eine Reinigungsmittelzuleitung 24 angeschlossen sind. Über diese Sprühdüsen 24 kann ein mikrobiologisch aktives Reinigungsmittel in den Absaugraum der Dunstabzugshaube versprüht werden.Within the extractor hood two spray nozzles 25 are attached, which are connected to a detergent supply line 24. Via these spray nozzles 24, a microbiologically active cleaning agent can be sprayed into the suction chamber of the extractor hood.

Mikrobiologisch aktive Reinigungsmittel sind an sich bekannt. Sie enthalten spezielle Mikroorganismen wie Bakterien oder andere Mikrokulturen, die in der Lage sind, organische Verunreinigungen wie fett- und ölhaltige Ablagerungen zu Wasser und Kohlendioxid abzubauen. Mikrobiologische aktive Reinigungsmittel sind unschädlich und stellen eine besonders umweltverträgliche Methode der Reinigung dar. Die darin enthaltenen Mikroorganismen belasten die Umwelt nicht, sondern leisten in Kläranlagen und Gewässern weiter nützliche Dienste. Zudem sind solche Reinigungsmittel materialverträglich und verursachen keine Korrosion oder Versprödung an Material und/oder Dichtungen. Ein Beispiel für ein solches Reinigungsmittel, das mit der beschriebenen Dunstabzugshaube verwendet werden kann, ist das Produkt "Microclean Hood" der Firma WT-Cleancorp.Microbiologically active cleaning agents are known per se. They contain special microorganisms, such as bacteria or other microcultures, which are able to break down organic contaminants, such as fatty and oily deposits, into water and carbon dioxide. Microbiological active cleaning agents are harmless and represent a particularly environmentally friendly method of purification. The microorganisms contained therein do not pollute the environment but continue to provide useful services in sewage treatment plants and bodies of water. In addition, such detergents are compatible with materials and cause no corrosion or embrittlement of material and / or seals. An example of such a cleaning agent that can be used with the described hood is the product "Microclean Hood" from WT-Cleancorp.

An die Reinigungsmittelzuleitung 24 ist eine Dosiereinheit 32 angeschlossen, die das Reinigungsmittel dosiert zu den Sprühdüsen 25 fördert. Über eine Ansaugleitung 34 ist die Dosiereinheit 32 mit einem Reinigungsmittelkanister 33 verbunden. Im Ausführungsbeispiel enthält die Dosiereinrichtung eine Dosierpumpe. Diese fördert über die Ansaugleitung 34, welche in den Reinigungsmittelkanister 33 hineinragt, geringe Mengen des Reinigungsmittels unter Druck zu den beiden Sprühdüsen 25. Die Dosierpumpe fördert etwa 5 ml Reinigungsmittel pro m2 zu reinigender Fläche der Dunstabzugshaube.To the detergent supply line 24, a metering unit 32 is connected, which delivers the detergent metered to the spray nozzles 25. Via a suction line 34, the metering unit 32 is connected to a detergent canister 33. In the exemplary embodiment, the metering device contains a metering pump. This promotes via the suction line 34, which projects into the detergent canister 33, small amounts of the detergent under pressure to the two spray nozzles 25. The metering pump delivers about 5 ml of detergent per m 2 to be cleaned surface of the hood.

Anstelle einer Dosierpumpe kann die Dosiereinrichtung 32 auch mit einem Dosierventil und einem Kompressor realisiert werden, der den Reinigungsmittelbehälter 33 dauerhaft unter Druck setzt, so daß bei kurzzeitigem Öffnen des Dosierventils eine vorgesehene Menge des Reinigungsmittels aus dem Reinigungsmittelbehälter 33 unter Druck in die Reinigungsmittelzuleitung 24 bis zu den Sprühdüsen 25 steigt.Instead of a metering pump, the metering device 32 can also be realized with a metering valve and a compressor which permanently pressurizes the detergent container 33, so that upon brief opening of the metering valve an intended amount of the detergent from the detergent container 33 under pressure in the detergent supply line 24 up to the spray nozzles 25 rises.

Der Reinigungsmittelkanister 33 kann entweder fest eingebaut und zur externen Wiederbefüllung vorgesehen sein oder es kann der vom Hersteller des mikrobiologisch aktiven Reinigungsmittels gelieferte standardisierte Einwegkanister verwendet werden, in den dann einfach ein Schlauchende der Ansaugleitung 34 gesteckt wird.The detergent canister 33 can either be permanently installed and provided for external refilling or it can be the standardized one supplied by the manufacturer of the microbiologically active cleaning agent Disposable canisters are used, in which then simply a hose end of the intake pipe 34 is inserted.

Die Sprühdüsen 25 sind als Nebeldüsen ausgebildet, so daß das unter Druck geförderte Reinigungsmittel fein vernebelt wird und die Dunstabzugshaube 20 im Inneren gleichmäßig benetzt.The spray nozzles 25 are designed as mist nozzles, so that the under pressure promoted cleaning agent is finely atomized and the extractor hood 20 wets evenly inside.

An der Dunstabzugshaube 20 ist ein Entleerhahn 22 angebracht, der über eine Ableitung 23 in einen bauseitigen Abfluß 15 führt. Über den Entleerhahn 22 kann das in geringen Mengen anfallende Schmutzwasser und überschüssiges Reinigungsmittel, das sich in einer Sammelrinne am unteren Rand der Dunstabzugshaube ansammelt, in den Abfluß abgeleitet werden. Vorzugsweise ist der Entleerhahn automatisiert, so daß anfallende Flüssigkeitsmengen regelmäßig automatisch abgeleitet werden.On the extractor hood 20, an emptying tap 22 is attached, which leads via a discharge line 23 into an on-site drain 15. About the drain cock 22 which accumulates small amounts of dirty water and excess detergent, which accumulates in a collecting trough at the bottom of the hood, be discharged into the drain. Preferably, the drain valve is automated, so that accumulating liquid quantities are regularly discharged automatically.

Gemäß einer Weiterbildung der Erfindung ist eine programmierbare Steuereinheit 35 vorgesehen. Die Steuereinheit 35 sorgt dafür, daß die Reinigung der Dunstabzugshaube 20 vollautomatisch abläuft. Dazu aktiviert sie die Dosiereinheit zu vorprogrammierten Zeiten. Auf diese Weise lassen sich in vorprogrammierten Zeitzyklen ablaufende Reinigungsintervalle festlegen, beispielsweise täglich nach Betriebsende oder vor Betriebsbeginn. Zudem ist es sinnvoll, die Dunstabzugshaube nach dem Besprühen noch etwa 5 min laufen zu lassen, damit überschüssiger Reinigungsmittelnebel abgesaugt wird. Dies kann ebenfalls vorteilhaft von der Steuereinheit 35 gesteuert werden, indem der Lüfter der Dunstabzugshaube während jeder Reinigung zwangsweise angeschaltet wird. Selbstverständlich kann die Reinigung über das Steuergerät 35 auch manuell ausgeführt werden, wobei es hierbei ebenfalls vorteilhaft ist, den Lüfter über die Steuereinheit zwangsweise anzustellen.According to one embodiment of the invention, a programmable control unit 35 is provided. The control unit 35 ensures that the cleaning of the extractor hood 20 runs fully automatically. To do this, it activates the dosing unit at pre-programmed times. In this way, cleaning intervals that occur in preprogrammed time cycles can be defined, for example, daily after the end of operation or before the start of operation. In addition, it makes sense to let the cooker hood run for about 5 minutes after spraying, so that excess detergent mist is sucked off. This may also be advantageously controlled by the control unit 35 by forcibly turning on the fan of the extractor hood during each cleaning. Of course, the cleaning can also be carried out manually via the control unit 35, It is also advantageous here to force the fan via the control unit.

Zusätzlich ist in den Haubenkörper der Dunstabzugshaube 20 noch ein Niedervolt-Bedientableau 28 eingebaut. Es ermöglicht neben einer einfachen Bedienung über entsprechende Bedientasten eine kontinuierliche Überwachung der Reinigungszyklen und zeigt mögliche Fehlfunktionen an. Außerdem enthält es eine Füllstandsanzeige für den Reinigungsmittelkanister 33 und erzeugt einen Alarm, wenn das Reinigungsmittel zur Neige zu gehen droht.In addition, a low-voltage control panel 28 is still installed in the hood body of the hood 20. In addition to easy operation via corresponding control buttons, it enables continuous monitoring of the cleaning cycles and indicates possible malfunctions. In addition, it contains a level indicator for the detergent canister 33 and generates an alarm when the detergent is about to run low.

Die Dosiereinheit, der Reinigungsmittelbehälter und die Steuereinheit sind in einem kompakten und hygienischen Technikschrank mit gemeinsamem Stromanschluß 36 untergebracht. Die Reinigungsmittelzuleitung 24 zwischen Dunstabzugshaube und Technikschrank ist eine flexible Schlauchleitung, die eine einfachste Verlegung ermöglicht. Innerhalb der Dunstabzugshaube sind Reinigungsmittelzuleitung 24 und Sprühdüsen 25 aus Edelstahl, beispielsweise Chromnickelstahl ausgeführt, um gute Reinigungsergebnisse zu erzielen und die Brandgefahr zu vermindern.The dosing unit, the detergent container and the control unit are housed in a compact and hygienic technical cabinet with common power connection 36. The cleaning agent supply line 24 between the extractor hood and the technical cabinet is a flexible hose line, which enables easy installation. Within the extractor hood, detergent feed line 24 and spray nozzles 25 are made of stainless steel, for example chrome-nickel steel, in order to achieve good cleaning results and to reduce the risk of fire.

In Figur 2 ist ein schematischer Querschnitt durch die Dunstabzugshaube 20 gezeigt. Die Dunstabzugshaube besitzt einen Aerosolabscheider 26, hinter dem die Sprühdüsen 25 in etwa 50 cm Abstand angeordnet sind. Zusätzlich ist in der Dunstabzugshaube eine Beleuchtungseinrichtung 27 integriert.FIG. 2 shows a schematic cross section through the extractor hood 20. The extractor hood has an aerosol separator 26, behind which the spray nozzles 25 are arranged at a distance of approximately 50 cm. In addition, a lighting device 27 is integrated in the extractor hood.

Der Aerosolabscheider ist ein dauerhafter Filter, der dazu dient, in den abgesaugten Dünsten enthaltene Fett- und Schmutzpartikel abzufangen. Er besteht im Ausführungsbeispiel aus labyrinthartig verschachtelten Leitblechen aus Edelstahl und einem dahinter angeordneten Filter aus Edelstahlgeflecht. An dem kalten Metall schlagen sich Fettdämpfe nieder und Schmutzpartikel bleiben an der großen Oberfläche haften.The aerosol separator is a permanent filter that serves to trap grease and dirt particles contained in the extracted fumes. He exists in Embodiment of maze-like interleaved baffles made of stainless steel and a filter arranged behind stainless steel braid. On the cold metal, grease fumes and dirt particles stick to the large surface.

Selbstverständlich können in der Dunstabzugshaube auch andere Arten von Filtern eingesetzt werden, wie beispielsweise Aktivkohlefilter.Of course, other types of filters can be used in the cooker hood, such as activated carbon filter.

Durch das regelmäßige Besprühen des Aerosolabscheiders 26 mit dem mikrobiologisch aktiven Reinigungsmittel werden abgeschiedene Fett- und Schmutzpartikel wirkungsvoll abgebaut und entfernt. Der Aerosolabscheider kann so annähernd wartungsfrei über lange Zeiträume betrieben werden. Bei täglichem Einsatz in gewerblichen Küchen ist es lediglich alle 14 Tage empfehlenswert, den Filter zusätzlich mit warmem Wasser auszuwaschen.Regular spraying of the aerosol separator 26 with the microbiologically active cleaning agent effectively removes separated fat and dirt particles and removes them. The aerosol separator can thus be operated almost maintenance-free over long periods of time. For daily use in commercial kitchens, it is only recommended to wash the filter with warm water every 14 days.

Durch den modularen Aufbau ist eine einfache Nachrüstung vorhandener Dunstabzugshauben mit dem Reinigungssystem möglich. Dazu wird lediglich innerhalb der Haube die Edelstahlzuleitung mit den Sprühdüsen installiert und über die flexible Zuleitung der externe Technikschrank mit der zum Betrieb erforderlichen integrierten Steuer- und Regeltechnik, Dosierpumpe und Reinigungsmittelbehälter angeschlossen.The modular design makes it easy to retrofit existing cooker hoods with the cleaning system. For this purpose, the stainless steel supply line is installed with the spray nozzles only within the hood and connected via the flexible supply line of the external technical cabinet with the required for operation integrated control and regulation, metering pump and detergent container.

Das Reinigungssystem kann nicht nur in Dunstabzugshauben installiert werden, sondern eignet sich für alle Arten von gewerbsmäßig genutzten Abluftkammern, wie beispielsweise Tresenhauben, Grillhauben, Trapezhauben oder Trapezkanäle.The cleaning system can not only be installed in extractor hoods, but is suitable for all types of commercial exhaust air chambers, such as counter hoods, grill hoods, trapeze hoods or trapezoidal ducts.

Claims (20)

Abluftkammer zum Entlüften geschlossener Räume, mit
einer Reinigungsmittelzuleitung (24) und mindestens einer im Inneren der Abluftkammer (20) angebrachten Sprühdüse (25) zum Besprühen mindestens eines Bereiches der Abluftkammer (20) mit einem Reinigungsmittel,
dadurch gekennzeichnet, daß
die mindestens eine Sprühdüse (25) über die Reinigungsmittelzuleitung (24) mit einer Dosiereinheit (32) zur dosierten Einleitung des Reinigungsmittels verbunden ist, die eine Einlaßöffnung (34) für vorzugsweise mikrobiologisch aktives Reinigungsmittel aufweist.Exhaust air chamber for venting closed rooms, with
a cleaning agent supply line (24) and at least one spray nozzle (25) mounted inside the exhaust air chamber (20) for spraying at least a portion of the exhaust air chamber (20) with a cleaning agent,
characterized in that
the at least one spray nozzle (25) is connected via the detergent feed line (24) to a metering unit (32) for metered introduction of the cleaning agent, which has an inlet opening (34) for preferably microbiologically active cleaning agent. Abluftkammer nach Anspruch 1, dadurch
gekennzeichnet, daß die Dosiereinheit (32) eine Dosiermittelpumpe umfaßt.Exhaust air chamber according to claim 1, characterized
characterized in that the metering unit (32) comprises a metering medium pump. Abluftkammer nach Anspruch 1 oder 2, dadurch
gekennzeichnet, daß die Einlaßöffnung (34) in einen Reinigungsmittelkanister (33) für das vorzugsweise mikrobiologisch aktive Reinigungsmittel hineinragt.Exhaust chamber according to claim 1 or 2, characterized
characterized in that the inlet opening (34) projects into a detergent canister (33) for the preferably microbiologically active cleaning agent. Abluftkammer nach Anspruch 3, gekennzeichnet durch
eine Füllstandsanzeige zur Anzeige des Reinigungsmittelstandes im Reinigungsmittelkanister (33).Exhaust air chamber according to claim 3, characterized by
a level indicator for displaying the detergent level in the detergent canister (33). Abluftkammer nach einem der vorhergehenden
Ansprüche, dadurch gekennzeichnet daß die mindestens eine Sprühdüse (25) als Nebeldüse zur Erzeugung eines feinverteilten Sprühnebels ausgebildet ist.Exhaust air chamber according to one of the preceding
Claims, characterized in that the at least a spray nozzle (25) is designed as a mist nozzle for generating a finely divided spray. Abluftkammer nach einem der vorhergehenden
Ansprüche, gekennzeichnet durch eine programmierbare Steuereinheit (35) zur Aktivierung der Dosiereinheit (32) während in vorprogrammierbaren Zeitzyklen ablaufenden Reinigungsintervallen.Exhaust air chamber according to one of the preceding
Claims, characterized by a programmable control unit (35) for activating the dosing unit (32) during cleaning intervals occurring in pre-programmable time cycles. Abluftkammer nach Anspruch 1, 3 und 4 dadurch
gekennzeichnet, daß Dosiereinheit (32), Reinigungsmittelkanister (33) und Steuereinheit (35) in einem abgeschlossenen Technikschrank (30) untergebracht sind.Exhaust air chamber according to claim 1, 3 and 4 characterized
in that the dosing unit (32), cleaning agent canister (33) and control unit (35) are accommodated in a closed technical cabinet (30). Abluftkammer nach einem der vorhergehenden
Ansprüche, gekennzeichnet durch einen vorzugsweise automatisierten Entleerhahn (22), der zur Ableitung von anfallendem Schmutzwasser an einen Abfluß (15) anschließbar ist.Exhaust air chamber according to one of the preceding
Claims, characterized by a preferably automated drain valve (22), which is connectable to the discharge of accumulating waste water to a drain (15). Abluftkammer nach einem der vorhergehenden
Ansprüche, dadurch gekennzeichnet daß die Abluftkammer (20) als eine mit einem Absaugkanal (21) verbundene Dunstabzugshaube mit einem Aerosolabscheider (26) ausgebildet ist, wobei die mindestens eine Sprühmitteldüse (25) derart angeordnet ist, daß Absaugkanal (21), Aerosolabscheider (26) und Absaugraum gleichmäßig mit Reinigungsmittel benetzt werden.Exhaust air chamber according to one of the preceding
Claims, characterized in that the exhaust air chamber (20) is designed as an extractor hood with an aerosol separator (26), wherein the at least one spray nozzle (25) is arranged such that the suction channel (21), aerosol separator (26 ) and suction chamber are evenly wetted with detergent. Abluftkammer nach einem der vorhergehenden
Ansprüche, dadurch gekennzeichnet daß die mindestens eine Sprühdüse (25) sowie ein innerhalb der Abluftkammer angeordneter Abschnitt der Reinigungsmittelzuleitung (24) aus einem Chromnickelstahl hergestellt sind.Exhaust air chamber according to one of the preceding
Claims, characterized in that the at least one spray nozzle (25) as well as a section arranged within the exhaust air chamber Detergent supply line (24) are made of a stainless steel. Abluftkammer nach Anspruch 10, gekennzeichnet durch
ein im Haubenkörper der Dunstabzugshaube eingelassenes Bedientableau (28).Exhaust air chamber according to claim 10, characterized by
a control panel (28) embedded in the hood body of the extractor hood. Reinigungssystem für eine Abluftkammer (20), mit
einer Reinigungsmittelzuleitung (24) und mindestens einer im Inneren der Abluftkammer (20) anbringbaren Sprühdüse (25) zum Besprühen mindestens eines Bereiches der Abluftkammer (25) mit einem Reinigungsmittel,
gekennzeichnet durch
eine mit der mindestens einen Sprühdüse (25) über die Reinigungsmittelzuleitung (24) verbindbare Dosiereinheit (32) zur dosierten Einleitung des Reinigungsmittels, die eine Einlaßöffnung (34) für vorzugsweise mikrobiologisch aktives Reinigungsmittel aufweist.Cleaning system for an exhaust air chamber (20), with
a cleaning agent supply line (24) and at least one spray nozzle (25) which can be mounted inside the exhaust air chamber (20) for spraying at least one area of the exhaust air chamber (25) with a cleaning agent,
marked by
a with the at least one spray nozzle (25) via the cleaning agent supply line (24) connectable dosing unit (32) for metered introduction of the cleaning agent having an inlet opening (34) for preferably microbiologically active detergent. Reinigungssystem nach Anspruch 12, dadurch
gekennzeichnet, daß die Dosiereinheit (32) eine Dosiermittelpumpe umfaßt.Cleaning system according to claim 12, characterized
characterized in that the metering unit (32) comprises a metering medium pump. Reinigungssystem nach Anspruch 12 oder 13, dadurch
gekennzeichnet, daß die Einlaßöffnung (34) in
einen Reinigungsmittelkanister (33) für das vorzugsweise mikrobiologisch aktive Reinigungsmittel hineinragt.Cleaning system according to claim 12 or 13, characterized
characterized in that the inlet opening (34) in
a detergent canister (33) protrudes for the preferably microbiologically active detergent. Reinigungssystem nach Anspruch 14, gekennzeichnet
durch eine Füllstandsanzeige zur Anzeige des Reinigungsmittelstandes im Reinigungsmittelkanister (33).Cleaning system according to claim 14, characterized
by a level indicator for displaying the detergent level in the detergent canister (33). Reinigungssystem nach einem der Ansprüche 12 bis 15,
dadurch gekennzeichnet, daß die mindestens eine Sprühdüse (25) als Nebeldüse zur Erzeugung eines feinverteilten Sprühnebels ausgebildet ist.Cleaning system according to one of claims 12 to 15,
characterized in that the at least one spray nozzle (25) is designed as a mist nozzle for generating a finely divided spray. Reinigungssystem nach einem der Ansprüche 12 bis 16,
gekennzeichnet durch eine programmierbare Steuereinheit (35) zur Aktivierung der Dosiereinheit (32) während in vorprogrammierbaren Zeitzyklen ablaufenden Reinigungsintervallen.Cleaning system according to one of claims 12 to 16,
characterized by a programmable control unit (35) for activating the dosing unit (32) during cleaning intervals occurring in pre-programmable time cycles. Reinigungssystem nach Anspruch 12, 14 und 17 dadurch
gekennzeichnet, daß Dosiereinheit (32), Reinigungsmittelkanister (33) und Steuereinheit (35) in einem abgeschlossenen Technikschrank (30) untergebracht sind.Cleaning system according to claim 12, 14 and 17 characterized
in that the dosing unit (32), cleaning agent canister (33) and control unit (35) are accommodated in a closed technical cabinet (30). Reinigungssystem nach einem der Ansprüche 12 bis 18,
gekennzeichnet durch einen vorzugsweise automatisierten Entleerhahn (22), der zur Ableitung von anfallendem Schmutzwasser an einen Abfluß (15) anschließbar ist.Cleaning system according to one of claims 12 to 18,
characterized by a preferably automated drain cock (22), which is connected to the discharge of accumulating waste water to a drain (15). Reinigungssystem nach einem der Ansprüche 12 bis 19,
dadurch gekennzeichnet daß die mindestens eine Sprühdüse (25) sowie ein innerhalb der Abluftkammer anzuordnender Abschnitt der Reinigungsmittelzuleitung (24) aus einem Chromnickelstahl hergestellt sind.Cleaning system according to one of claims 12 to 19,
characterized in that the at least one spray nozzle (25) and a portion of the cleaning agent supply line (24) to be arranged within the exhaust air chamber are made of a chromium nickel steel.
EP05022478.1A 2005-10-14 2005-10-14 Self-cleaning exhaust hood and system for cleaning an exhaust hood Active EP1775035B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05022478.1A EP1775035B1 (en) 2005-10-14 2005-10-14 Self-cleaning exhaust hood and system for cleaning an exhaust hood
PL05022478T PL1775035T3 (en) 2005-10-14 2005-10-14 Self-cleaning exhaust hood and system for cleaning an exhaust hood

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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EP1775035B1 EP1775035B1 (en) 2016-08-31

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CN103062814A (en) * 2011-10-19 2013-04-24 正太平洋(中国)厨具有限公司 Automatic cleaning mechanism of fume extractor
WO2014000868A1 (en) * 2012-06-27 2014-01-03 Südluft Systemtechnik GmbH & Co. KG Method for operating an exhaust air system and exhaust air system for a kitchen
CN104048343A (en) * 2014-07-02 2014-09-17 上海美力源环保科技有限公司 Kitchen oil fume purification method and device
CN104048341A (en) * 2014-07-02 2014-09-17 上海美力源环保科技有限公司 Kitchen oil fume purification method and device
CN104048342A (en) * 2014-07-02 2014-09-17 上海美力源环保科技有限公司 Kitchen oil fume purification method and device
CN104266243A (en) * 2014-09-05 2015-01-07 宁波方太厨具有限公司 Oil filter type range hood
GB2540148A (en) * 2015-07-06 2017-01-11 Quintex Systems Ltd Controlling contaminant build-up in an air extraction system
WO2018050716A1 (en) * 2016-09-16 2018-03-22 Berling Aero IP UG (haftungsbeschränkt) Steam extraction device with lighting control
CN110567019A (en) * 2019-09-19 2019-12-13 庞敏 Easy-to-clean range hood
WO2020263172A1 (en) * 2019-06-26 2020-12-30 Bioteria Technologies Ab Methods and ventilation system for controlling a biological treatment process
GB2604887A (en) * 2021-03-17 2022-09-21 Probionate Ltd Cleaning systems and methods for extraction or ventilation ducts

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Cited By (15)

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Publication number Priority date Publication date Assignee Title
CN103062814A (en) * 2011-10-19 2013-04-24 正太平洋(中国)厨具有限公司 Automatic cleaning mechanism of fume extractor
WO2014000868A1 (en) * 2012-06-27 2014-01-03 Südluft Systemtechnik GmbH & Co. KG Method for operating an exhaust air system and exhaust air system for a kitchen
CN104048342B (en) * 2014-07-02 2017-02-01 上海美力源环保科技有限公司 Kitchen oil fume purification method and device
CN104048343A (en) * 2014-07-02 2014-09-17 上海美力源环保科技有限公司 Kitchen oil fume purification method and device
CN104048341A (en) * 2014-07-02 2014-09-17 上海美力源环保科技有限公司 Kitchen oil fume purification method and device
CN104048342A (en) * 2014-07-02 2014-09-17 上海美力源环保科技有限公司 Kitchen oil fume purification method and device
CN104266243A (en) * 2014-09-05 2015-01-07 宁波方太厨具有限公司 Oil filter type range hood
GB2540148A (en) * 2015-07-06 2017-01-11 Quintex Systems Ltd Controlling contaminant build-up in an air extraction system
WO2017005659A1 (en) * 2015-07-06 2017-01-12 Quintex Systems Limited Controlling contaminant build-up in an air extraction system
GB2540148B (en) * 2015-07-06 2018-05-09 Quintex Systems Ltd Controlling contaminant build-up in an air extraction system
WO2018050716A1 (en) * 2016-09-16 2018-03-22 Berling Aero IP UG (haftungsbeschränkt) Steam extraction device with lighting control
WO2020263172A1 (en) * 2019-06-26 2020-12-30 Bioteria Technologies Ab Methods and ventilation system for controlling a biological treatment process
US11964890B2 (en) 2019-06-26 2024-04-23 Bioteria Technologies Ab Methods and ventilation system for controlling a biological treatment process
CN110567019A (en) * 2019-09-19 2019-12-13 庞敏 Easy-to-clean range hood
GB2604887A (en) * 2021-03-17 2022-09-21 Probionate Ltd Cleaning systems and methods for extraction or ventilation ducts

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PL1775035T3 (en) 2017-02-28
EP1775035B1 (en) 2016-08-31

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