EP2824395A2 - Procédé de fonctionnement d'une hotte d'aspiration et hotte d'aspiration - Google Patents

Procédé de fonctionnement d'une hotte d'aspiration et hotte d'aspiration Download PDF

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Publication number
EP2824395A2
EP2824395A2 EP14176129.6A EP14176129A EP2824395A2 EP 2824395 A2 EP2824395 A2 EP 2824395A2 EP 14176129 A EP14176129 A EP 14176129A EP 2824395 A2 EP2824395 A2 EP 2824395A2
Authority
EP
European Patent Office
Prior art keywords
odor
filter
extractor
sensor
airway
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14176129.6A
Other languages
German (de)
English (en)
Other versions
EP2824395A3 (fr
Inventor
Marcus Frank
Dr. Norbert Gärtner
Uwe Schaumann
Konrad SCHÖNEMANN
Henry Fluhrer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Geratebau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Publication of EP2824395A2 publication Critical patent/EP2824395A2/fr
Publication of EP2824395A3 publication Critical patent/EP2824395A3/fr
Withdrawn legal-status Critical Current

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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
    • F24C15/2021—Arrangement or mounting of control or safety systems

Definitions

  • the invention relates to a method for operating a fume hood or an extractor hood and a correspondingly designed extractor hood.
  • the invention has for its object to provide an aforementioned method for operating a fume hood and a corresponding extractor with which problems of the prior art can be solved and it is possible in particular to meet demand and possibly automated to allow operation or even to start.
  • the extractor hood or the hood has a fan with fan motor, at least one filter, in particular a so-called odor filter, a first odor sensor in an airway in front of the filter and a second odor sensor in the airway after the filter.
  • the air passage through the extractor and the filter or odor filter and the odor sensors are arranged therein.
  • Such odor filters are advantageous activated carbon filter.
  • the odor sensors are advantageous VOC sensors, So-called "Volatile Organic Compound” sensors, but may also be generally called odor sensors.
  • a fan motor can be arranged at basically any point, it is advantageously arranged in the air path behind the filter or behind the second odor sensor.
  • a filter efficiency can be calculated from the ratio of the first sensor signal of the first odor sensor to the second sensor signal of the second odor sensor. It is thus formed as an efficiency of the quotient of the two sensor signals. If this falls below a certain predetermined value for the Filter Obersfiltergrad, this is a sign that the filter is no longer working well or needs to be replaced or cleaned. Then he is in fact added and the filter effect has decreased too much. So that can be a request to an operator as needed and exact, clean the filter or change. This is significantly more advantageous than other methods such as an operation duration measurement or a simple time measurement, for example in days, weeks or months since installation of the filter.
  • a further advantage of this measurement method according to the invention is that it actually measures the filter effect directly, and not just via pressure conditions, the air flow rate through the filter.
  • the odor sensor or VOC sensor should be able to work broadband.
  • a selective, but a broadband odor or VOC measurement should be carried out here, which not only detects specific odors, as they are especially produced exclusively in cooking, but can detect odors in general.
  • these may be odors which are particularly subtly perceived by the human nose.
  • a fume hood not only eliminate disturbing odors only during or after cooking, but also generally contribute to improving the indoor environment.
  • the filter efficiency at which an exchange should take place or a signal is generated for example, to 50% of the maximum Filter efficiency can be determined. This means that the filter should then be replaced or a user should be made aware with such a signal when behind the filter, the second odor sensor generates twice as high or high sensor signals as when new.
  • the signal to a user can be optical and / or acoustic, for example a light or flashing display and, alternatively or additionally, an acoustic signal.
  • Another way of signaling to a user is at least a short-term or short-lasting reduction of the fan power, possibly even a brief interruption of the operation of the extractor.
  • a coarse mesh filter preferably a fat filter
  • a grease filter is advantageously arranged immediately in front of the first odor sensor so that a distance can be less than 20 cm, preferably less than 15 cm or 5 cm.
  • fat filter which may comprise, for example, stainless steel expanded metal, fat particles are to be filtered out even before the above-described odor filter. Due to the small distance between the first odor sensor behind the grease filter, odor-laden air reaches this sensor very quickly, so that, for example, it alone can be enough to start the extractor automatically.
  • a defined predetermined odor threshold for the first odor sensor can be provided or monitored by a controller, beyond which the fan motor is automatically started. This can go on until the limit falls below again.
  • a kind of caster can be provided, which is either determined for a certain period of time or until it falls below the predetermined limit, advantageously by 10% to 30%.
  • the power of the fan motor depending on the determined filter efficiency can be adjusted to optimize the fan performance depending on the specific odor load and the room size around the extractor around. This may possibly reduce the noise pollution caused by the extractor and save energy. This is due to the fact that the adsorption of impurities or odor molecules in the odor filter gets worse the faster the air flows through the odor filter. On the other hand, a higher amount of air is sucked through the filter in the same time by a higher fan power than at a lower fan power, so it will be more cleaned odor-contaminated air. This results in each case for a particular odor optimum fan performance, in view of the passage time of odor molecules through the filter and a space-dependent Umicalzzykluszeit the room optimum air cleaning is possible.
  • the fan power can be varied, in particular in a larger range or relatively finely varied, that is to say with a large number of stages or even steplessly, then the fan power can be passed through once in a substantial range.
  • the previously defined filter efficiency can be continuously measured, whereby just an optimum of an operating point can be determined. This makes it easy to set the optimal fan performance for a specific odor load and the given room size.
  • An optimum of the initially defined filter efficiency is where the aforementioned quotient is as large as possible.
  • the extractor or a control of the extractor with a cooking appliance signal-transmitting connected in particular on the or on which the extractor is arranged or whose odors he should mainly eliminate.
  • a wireless connection is preferred, for example by WLAN, Zigbee or the like. It can also be transmitted whether only one or more hotplates of a hob are active, so that the operation of the extractor can be adjusted to it.
  • a connection to the cooking appliance whether the cooking appliance works with gas or electricity as an energy source.
  • a fan power or a fan power profile can be adapted to it.
  • the extractor is activated even with other odor in the room even without operation of said cooking appliance.
  • it may be determined in a control of the extractor hood that the first odor sensor detects the odor load in the room when the cooking appliance is switched off and activates the extractor hood when a first room limit value is exceeded.
  • This first room limit value may be lower than a limit from which the extractor is activated during operation of the cooking appliance. If the extractor then does not run during cooking, but rather to improve or purify the room air, noise levels should remain low.
  • the extractor can be started in interval mode. For example, he can work for 3 minutes to 15 minutes at a time per hour.
  • a cooking appliance, with which the extractor is combined and of which its operation may be controlled, is advantageously a hob, but it may also be an oven. Furthermore, a possibility can be provided for programming the control of the extractor hood in such a way by a user that a sensitivity of the sensors can be set user-dependent, for example via parameterization options. Thus, a user can generally predetermine for the operation of the extractor, whether this should start automatically, for example, even at low odor pollution of the room air or whether this should be done only with stronger odor.
  • an extractor hood 11 is shown as inventive extractor with a hood body 12 and a shaft 13 above it. Built into it are along an airway L a conventional grease filter 15, an odor filter 17 behind and again behind a fan 19. These are formed as known from the prior art, the grease filter advantageously with stainless steel expanded metal and the odor filter 17 as an activated carbon filter.
  • a first odor sensor 21 is arranged, which is advantageously an aforementioned VOC sensor.
  • the distance may be in the aforementioned range and be a few centimeters, for example, 5 cm to 15 cm.
  • a distance to the odor filter 17 may be in a similar range or higher, also depending on the construction of the hood.
  • a second odor sensor 23 which is advantageously also designed as a VOC sensor. Particularly advantageously, it is identically constructed like the first sensor 21.
  • the air path L in the example shown here can go back into the room via a circulating-air guide. Alternatively, it is also conceivable that the air is then transported as exhaust air to the outside.
  • the fan 19 and the sensors 21 and 23 are connected to a controller 25 of the hood 11.
  • the controller 25 may evaluate the sensor signals of the sensors 21 and 23. Furthermore, it can adjust the performance of the fan 19, advantageously relatively finely graduated or even stepless under certain circumstances.
  • the controller 25 is also connected to a radio module 26 for a radio link 27.
  • a hob 30 with two burners 31 a and 31 b. While the hotplate 31 a is electrically operated, the hotplate 31 b is operated with gas.
  • a gas valve 32b is provided for the gas supply.
  • a controller 34 of the hob 30 is connected to the cooking area 31 a or may, optionally with an intermediate power electronics set their performance. Further, the controller 34 via the gas valve 32 b, the power at the gas-powered cooking point 31 b a.
  • On the left cooking point 31a is a pan 36, flows from the exhaust air or vapor 37 upwards or rises. Also, the controller 34 is connected to a radio module 35, so that a radio link 27 with the hood 11 is possible.
  • Fig. 2 is shown in a diagram over time t on the left vertical axis, such as an odor intensity as "arbitrary units" on the first odor sensor 21 and on the second odor sensor 23 connected behind it runs in the example of the onion of onions. Plotted above is the curve for the applied on the right vertical axis filter efficiency n, as a quotient of the sensor signal on the first odor sensor 21 and the sensor signal on the second odor sensor 23. On the left vertical axis, the odor stress is plotted is detected by the two odor sensors 21 and 23 over time.
  • the fan 19 of the hood 11 is switched off with the power level LS0. It can be seen from the course of the odor load on the first odor sensor 21 that it begins after about 2 minutes, reaches its maximum value at slightly more than 7 minutes, and then decays relatively quickly.
  • the significantly reduced odor load on the second odor sensor 23 shows the effectiveness of the odor filter 17.
  • not so many odor molecules are brought to the second odor sensor 23 at standstill fan 19, especially not by the odor filter 17.
  • the odor load which can be detected in the exhaust air behind the odor filter 17, namely the second odor sensor 23, is detected.
  • the maximum is between 8 and 10 minutes. Thereby, and because the odor load decreases, which emanates from, for example, an underlying pan, the filter efficiency n drops again significantly.
  • the filter efficiency n will decrease. In that case, the odor load measured by the second odor sensor 23 becomes greater because the odor filter 17 can no longer work as thoroughly. If the filter efficiency n now falls below a certain predetermined value, the filter effect on the odor filter 17 is too small and an aforementioned signaling via a signal lamp 28 on the extractor hood 11 is caused by the controller 25. This is a sign for a user to clean or change the odor filter 17.
  • An alternative signaling can be acoustic, possibly also in addition.
  • a signal can be given to a user via a brief stoppage of the fan 19. This can advantageously be done when there has been no reaction to previous signals, in particular the signal lamp 28.
  • Fig. 3 is in a similar diagram as in Fig. 2 the odor load or odor intensity as "arbitrary units" for the odor sensors 21 and 23 over time shown in the same cooking process.
  • the fan 19 works but, with a rather small power or power level LS1, which corresponds for example to about 1/5 to 1/3 of the maximum power. It is easy to see that even in this case, a good filtering effect, namely at least an efficiency of n> 2 is achieved, with high odor loads even an efficiency n of 5 or even higher.
  • the maximum at the first odor sensor 21 is reached after almost 10 minutes, but is higher than the Fig. 2 ,
  • the maximum at the second odor sensor 23 is again reached shortly thereafter, but is also higher.
  • the Fig. 4 is the course of the efficiency n to see over the measurement period as "arbitrary units" for three different power levels LS1, LS2 and LS3 of the hood 11 and the fan 19.
  • the x-axis designations 1,2 and 3 indicate times in this case, at typical filter efficiencies were recorded.
  • the power level LS1 is relatively low, such as to the Fig. 2 and 3 described, it can amount to 20% to 30% of the total output.
  • the power level LS2 is significantly larger and can be, for example, 60% to 70% of the maximum power.
  • the power level LS3 is the highest power level with the maximum power. It can be clearly seen that the filter efficiency is worse at high power levels than at the lower power level.
  • the air is very quickly and possibly also strongly swirled transported by the odor filter 17 so that it adsorb the odors and thus the odor only to a reduced extent and filter out or can lower.
  • a previously described optimization of the operating point of the hood can be done so that it always works with the best possible effect and the best possible filter efficiency.
  • the controller 25 can also be informed about which hotplate 31 of the hob is operated or in what way, so whether electrically or whether with gas. This can have an influence on the operation of the extractor hood 11 or the exhaust air purification, which is optimally and variably adjustable. The same can apply to an oven.
  • a kind of adjustability or parameterization option can be provided, with which a user can enter their own settings. For example, he can set whether the extractor hood is automatically switched on even when there is a relatively low odor or gas load in the air, detached from a possible cooking process.

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  • Engineering & Computer Science (AREA)
  • Ventilation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
EP14176129.6A 2013-07-10 2014-07-08 Procédé de fonctionnement d'une hotte d'aspiration et hotte d'aspiration Withdrawn EP2824395A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013213546.7A DE102013213546B4 (de) 2013-07-10 2013-07-10 Verfahren zum Betreiben eines Dunstabzugs und Dunstabzug

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EP2824395A2 true EP2824395A2 (fr) 2015-01-14
EP2824395A3 EP2824395A3 (fr) 2016-01-20

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110966643A (zh) * 2019-12-30 2020-04-07 海信集团有限公司 一种吸油烟机
WO2020163443A1 (fr) * 2019-02-05 2020-08-13 Oy Halton Group Ltd. Procédés, dispositifs et systèmes de contrôle de polluants de cuisson
EP3836746A1 (fr) 2019-12-13 2021-06-16 Ztove ApS Délégation de commande dans un processus de cuisson automatique en boucle
EP4056906A1 (fr) * 2021-03-08 2022-09-14 Whirlpool Corporation Détection automatique de hotte d'aération
EP4224070A1 (fr) * 2022-02-04 2023-08-09 Electrolux Appliances Aktiebolag Hotte de cuisinière
EP4386266A1 (fr) * 2022-12-13 2024-06-19 Arçelik Anonim Sirketi Appareil électroménager à commande de ventilateur automatique et son procédé de commande

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017100415B4 (de) * 2017-01-11 2022-01-13 Miele & Cie. Kg Dunstabzugshaube und Verfahren zum Betreiben
DE102017104934B4 (de) 2017-03-08 2021-03-04 minEnergy GmbH Dunstabzug
CN110986123B (zh) * 2019-11-15 2021-12-14 广东万和电气有限公司 清洁控制方法、清洁控制装置及吸油烟机
DE102021203578A1 (de) * 2021-04-12 2022-10-13 BSH Hausgeräte GmbH Verfahren und System zum Bestimmen eines Austauschzeitpunktes eines Geruchsfilters

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DE10307247A1 (de) 2003-02-17 2004-08-26 E.G.O. Elektro-Gerätebau GmbH Einrichtung zum Absaugen von Abluft eines Elektrowärmegeräts und Verfahren zum Betrieb derselben

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DE10158851A1 (de) 2001-11-30 2003-06-12 Bsh Bosch Siemens Hausgeraete Standzeiterfassungsvorrichtung für einen Filter einer Dunstabzugshaube
US20050224069A1 (en) * 2004-03-29 2005-10-13 Patil Mahendra M System and method for managing air from a cooktop
DE102004039549A1 (de) 2004-08-13 2005-11-03 Miele & Cie. Kg Dunstabzugshaube zur Absaugung von Kochdunst
JP2008128579A (ja) * 2006-11-22 2008-06-05 Tokyo Electric Power Co Inc:The 換気装置
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DE102011081303A1 (de) 2011-08-22 2013-02-28 BSH Bosch und Siemens Hausgeräte GmbH Überwachungsvorrichtung für Kochfelder
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DE102011083103A1 (de) 2011-09-19 2013-03-21 BSH Bosch und Siemens Hausgeräte GmbH Dunstabzugsvorrichtung und Verfahren zum Betreiben einer Dunstabzugsvorrichtung
DE102011082925B4 (de) 2011-09-19 2022-03-03 BSH Hausgeräte GmbH Dunstabzugsvorrichtung und Verfahren zum Betreiben einer Dunstabzugsvorrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10307247A1 (de) 2003-02-17 2004-08-26 E.G.O. Elektro-Gerätebau GmbH Einrichtung zum Absaugen von Abluft eines Elektrowärmegeräts und Verfahren zum Betrieb derselben

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020163443A1 (fr) * 2019-02-05 2020-08-13 Oy Halton Group Ltd. Procédés, dispositifs et systèmes de contrôle de polluants de cuisson
CN113348325A (zh) * 2019-02-05 2021-09-03 霍顿集团有限公司 烹饪污染物控制方法装置和系统
US20220082267A1 (en) * 2019-02-05 2022-03-17 Oy Halton Group Ltd. Cooking Pollutant Control Methods Devices and Systems
EP3836746A1 (fr) 2019-12-13 2021-06-16 Ztove ApS Délégation de commande dans un processus de cuisson automatique en boucle
CN110966643A (zh) * 2019-12-30 2020-04-07 海信集团有限公司 一种吸油烟机
EP4056906A1 (fr) * 2021-03-08 2022-09-14 Whirlpool Corporation Détection automatique de hotte d'aération
EP4224070A1 (fr) * 2022-02-04 2023-08-09 Electrolux Appliances Aktiebolag Hotte de cuisinière
EP4386266A1 (fr) * 2022-12-13 2024-06-19 Arçelik Anonim Sirketi Appareil électroménager à commande de ventilateur automatique et son procédé de commande

Also Published As

Publication number Publication date
EP2824395A3 (fr) 2016-01-20
DE102013213546B4 (de) 2022-01-20
DE102013213546A1 (de) 2015-01-15

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