EP2829809B1 - Selbstreinigende Dunstabzugshaube für Küche - Google Patents

Selbstreinigende Dunstabzugshaube für Küche Download PDF

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Publication number
EP2829809B1
EP2829809B1 EP13005619.5A EP13005619A EP2829809B1 EP 2829809 B1 EP2829809 B1 EP 2829809B1 EP 13005619 A EP13005619 A EP 13005619A EP 2829809 B1 EP2829809 B1 EP 2829809B1
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EP
European Patent Office
Prior art keywords
filter
cleaning
ramps
pressureless
hood
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.)
Active
Application number
EP13005619.5A
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English (en)
French (fr)
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EP2829809A1 (de
Inventor
Daniel Wanner
Jérome Hofer
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.)
Ginox SA
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Ginox SA
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Publication date
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Publication of EP2829809A1 publication Critical patent/EP2829809A1/de
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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

Definitions

  • the present invention relates to a kitchen hood that can retain grease vapors and fumes from a range and comprising at least one filter and means for cleaning the filters of the hood in the service position and / or during operation of the hood.
  • Such self-cleaning hoods are described for example in the documents CH 683 597 and CH 692,516 .
  • This type of hood includes means for cleaning the filter (s) continuously and during use of the hood, that is to say during the purification of the fatty vapors.
  • These cleaning means are generally arranged to bring a cleaning product diluted in water to the filter.
  • the water mixed with the cleaning product is for example conveyed to the filters by ramps or mobile carriages.
  • the object of the present invention is to provide a self-cleaning kitchen hood which overcomes the aforementioned drawbacks and which is effective, while being economical in water and cleaning product and which allows a degreasing of the vapors and cleaning of the optimal filters.
  • the present invention relates to a self-cleaning kitchen hood according to claim 1 and to a method of cleaning a filter fitted to such a self-cleaning hood according to claim 6.
  • the hood shown in the figure 1 comprises a box 1 open in its lower part and inside which are fixed an upper guide 2 and a lower guide 3.
  • the two upper and lower guides 2, 3 define a passage 4 through which are sucked the vapors and fumes from a stove (not shown) located under the hood.
  • the vapors and fumes can be sucked by any suitable suction means well known to those skilled in the art such as for example an extractor fan 12 as illustrated in FIG. figure 2 .
  • This passage 4 opens into a chamber 5 defined in the box 1.
  • the chamber 5 comprises at least one filter 6 and means for cleaning said filter.
  • the filter 6 is an expanded clay ball filter composed of a frame 62, an upper grid 63 and a lower grid 64. Expanded clay balls 65 are placed in the frame 62 between the grids upper 63 and lower 64.
  • the upper grid 63 is essentially flat, while the lower grid 64 is grooved thus increasing its surface.
  • the contact surface between the filter 6 and the vapors and fumes of the range is thus increased giving the filter 6 a high efficiency.
  • the clay beads 65 of the filter 6 have in turn a sufficiently large diameter to reduce the pressure drop when the fat-laden air passes through the filter 6.
  • the diameter of the balls 65 is between 15 and 20 mm .
  • the pressure drop By reducing the pressure drop, it reduces the energy required for the aspiration of the vapors.
  • the larger the diameter of the balls 65 the easier they are to clean.
  • the thickness of the bed of balls 65 in the frame 62 also makes it possible to control the pressure drop and the efficiency of the filter 6. Indeed, the greater the thickness, the greater the degreasing will be important.
  • the clay beads 65 have an acidic pH of between 5 and 5.5.
  • This pH can be obtained by any appropriate treatment of the beads 65 and in particular by buffering (soaking the beads in an acid solution to lower their natural pH).
  • buffering soaking the beads in an acid solution to lower their natural pH.
  • the filter In a kitchen hood, the filter is the heart of the system, the main element involved in the degreasing of vapors and fumes from the stove. However, the better the filter, the faster it grows. That is why it is necessary that the kitchen hood includes a filter effective, cleaning means effective and that cleans the filter effectively and without interrupting the operation of the hood.
  • the hood filter cleaning means comprise an upper feed ramp 7 and a lower feed ramp 8 each connected to a feed source (not shown) in water, preferably heated to about 55.degree. ° C.
  • the upper and lower feed ramps 7, 8 each have a U-shaped portion 71, 81, called a soap trap.
  • Each of the soap traps 71, 81 respectively constitutes an off-pressure zone of the upper and lower feed ramps 7, 8.
  • Each of the soap traps 71, 81 is connected via an appropriate injection valve 72, 82 to a reservoir of water.
  • cleaning product 91, 92, the cleaning product is generally an enzyme solution making the fats water-soluble.
  • Two pumps 93, 94 are respectively arranged between the tanks 91, 92 and the soap traps 71, 81 so as to supply them with cleaning product via the injection valves 72, 82.
  • a first rotary nozzle 10 arranged to spray the filter 6 from above.
  • a second rotary nozzle 11 arranged to spray the filter 6 from below.
  • Each of the upper and lower feed ramps 7, 8 is further equipped with a solenoid valve 73, 83 for controlling the flow of water in said ramps from the water supply source.
  • the kitchen hood according to the invention further comprises control means 100 arranged to control the injection valves 72, 82, the solenoid valves 73, 83, the pumps 93, 94 and the suction means (extractor fan 12). .
  • the extractor fan 12 sucks the vapors and fumes from the range which then pass through the filter 6.
  • the construction of the filter 6, its grooved lower grill 64 and the arrangement and the characteristics of the clay beads 65 that it contains makes said filter 6 very efficient and the air escaping from the filter 6 after passing through it is sufficiently clean to be reused in a heat recovery unit for example.
  • the control means are programmed to activate the filter cleaning means either at regular intervals or at the request of the user.
  • a cleaning cycle consists of the following steps.
  • the control means first activate the pumps 93, 94 which respectively inject via the injection valves 72, 82 a predetermined quantity of cleaning product from the tanks 91, 92 into the soap traps 71, 81.
  • the quantity of cleaning product injected into the soap trap 71 of the upper ramp 7 is higher than the quantity of cleaning product injected into the soap trap 81 of the lower ramp 8.
  • the control means activate the extractor fan 12 (if the hood was not already in operation) and open each of the solenoid valves 73, 83 so that the pressurized water from the power source circulates. in each of the upper and lower ramps 7, 8 respectively.
  • the water then pushes the cleaning product of the soap traps 71, 81 to the nozzles 10, 11 which disperse the cleaning product-water mixture on the upper and lower grids 63, 64 of the filter 6.
  • the means control valves 73, 83 open successively starting with the solenoid valve 73 of the upper ramp 7.
  • the opening of the solenoid valves 73, 83 may be a few tens of seconds, or preferably between 4 and 6 seconds. It is thus possible to achieve significant water savings while ensuring efficient degreasing since the concentration of the cleaning product arriving on the filter 6 is important.
  • the suction generated by the extractor fan 12 is maintained: in fact, the suction makes it possible to keep the cleaning product inside the filter 6 by means of a lifting effect increasing the cleaning time. action of said cleaning product and thus the effectiveness of degreasing.
  • the suction is then cut off, the control means 100 stopping the extractor fan 12, and the solenoid valves 73, 83 of the upper and lower ramps 7, 8 are again opened by the control means 100 to allow rinsing of the filter.
  • the rinsing time is 1 to 2 minutes.
  • the wastewater, guided by the lower guide 3, is evacuated by evacuation means provided in the lower part of the chamber 5 and the washing cycle ends.
  • the nozzles 10, 11 could be mounted on moving carriages reciprocating them during the wash cycle.
  • the hood according to the invention thus allows efficient degreasing since the cleaning product is distributed in a concentrated manner on the filter. It has been found that the cleaning product arrives on the filter ten times less diluted than in the known self-cleaning hoods mentioned above. In addition, the cleaning product is distributed in two directions on the filter, and with the help suction means, the action time of said product is greatly increased (no washing effect as in hoods of the prior art). In addition, the targeted distribution of the cleaning product saves money without losing efficiency by precisely dosing the product. This also has an ecological impact since fewer pollutants are released into the wastewater.
  • the hood according to the invention also saves water, since the washing cycle lasts more than a few tens of seconds against a few minutes in the prior art. Energy savings are also possible: if the clogging of the filters is not too important (which depends on the type of kitchen), it is possible to use cold water instead of heated water at 55 ° C.
  • the hood according to the invention having very effective cleaning means, it is possible to equip it with efficient filters which, even if they become dirty quickly, can be cleaned efficiently and allow optimal degreasing of the vapors and fumes laden with grease. which, once filtered, can then be recovered and recycled into energy recovery systems such as rotary heat recovery units.
  • the hood according to the invention can also be used in particularly difficult conditions such as in grilling, fast food or Asian type of cooking releasing particularly oily vapors.
  • the combination of a filter and cleaning means of said high-performance filter also ensures the cleanliness of the entire hood, especially the suction means, the chimney, but also the ambient air. All of these factors reduce the risk of fire, lower the cost operation (saving water, cleaner, energy, heat recovery %) and increasing user comfort.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)

Claims (8)

  1. Selbstreinigende Dunstabzugshaube mit einem Filter (6), Mitteln zum Ansaugen (12) der Luft durch den Filter (6) und Mitteln zum Reinigen des Filters (6), wobei die Mittel zum Reinigen des Filters eine obere Versorgungsleitung (7) zur Zuführung einer Flüssigkeit bis in den oberen Teil des Filters (6) und eine untere Versorgungsleitung (8) zur Zuführung einer Flüssigkeit bis in den unteren Teil des Filters (6) umfassen, dadurch gekennzeichnet, dass jede der oberen und unteren Leitung (7, 8) einen U-förmigen, drucklosen Abschnitt (71, 81) aufweist, dass die Mittel zum Reinigen zudem Mittel zum Einspritzen eines Reinigungsproduktes aus mindestens einem Behälter (91, 92) in jeden der drucklosen Abschnitte (71, 81) der oberen und unteren Leitung (7, 8) enthalten.
  2. Abzugshaube nach Anspruch 1, dadurch gekennzeichnet, dass sie zudem Steuerungsmittel (100) zur Steuerung der Einspritzung des Reinigungsproduktes in die drucklosen Abschnitte (71, 81) der oberen und unteren Leitung (7,8) umfasst.
  3. Abzugshaube nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es sich bei dem Filter (6) um einen Filter mit Blähtongranulat handelt.
  4. Abzugshaube nach Anspruch 3, dadurch gekennzeichnet, dass das Blähtongranulat einen ursprünglich sauren pH aufweist, so dass der saure pH bei Kontakt mit einer Lösung mit einem basischen pH im Wesentlichen neutralisiert wird.
  5. Abzugshaube nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jede der oberen und unteren Leitung (7, 8) mit einer sich drehenden Düse (10, 11) endet, die zum Versprühen einer beliebigen, von den Leitungen zum Filter 6 zugeführten Flüssigkeit ausgebildet ist.
  6. Verfahren zur Reinigung eines in eine selbstreinigende Dunstabzugshaube eingebauten Filters nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass es die folgenden Schritte umfasst:
    Einspritzung eines Reinigungsproduktes in jeden der drucklosen Abschnitte (71, 81) der oberen und unteren Leitung (7, 8), wobei in den Leitungen keine Flüssigkeit umgewälzt wird;
    Umwälzung einer Flüssigkeit in der oberen und unteren Leitung (7, 8) um das in den drucklosen Abschnitten (71, 81) der Leitungen (7, 8) enthaltene Reinigungsprodukt zum Filter (6) zu führen und ihn dann zu besprühen.
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass die Menge Reinigungsprodukt, die in den drucklosen Abschnitt (71) der oberen Leitung (71) eingespritzt wird, größer ist als die Menge Reinigungsprodukt, die in den drucklosen Abschnitt (81) der unteren Leitung (8) eingespritzt wird.
  8. Verfahren nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Mittel zum Ansaugen während der Durchführungsdauer des Verfahrens in Betrieb gehalten werden.
EP13005619.5A 2013-07-25 2013-12-03 Selbstreinigende Dunstabzugshaube für Küche Active EP2829809B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01324/13A CH708376B1 (fr) 2013-07-25 2013-07-25 Hotte de cuisine autonettoyante.

Publications (2)

Publication Number Publication Date
EP2829809A1 EP2829809A1 (de) 2015-01-28
EP2829809B1 true EP2829809B1 (de) 2016-06-22

Family

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EP13005619.5A Active EP2829809B1 (de) 2013-07-25 2013-12-03 Selbstreinigende Dunstabzugshaube für Küche

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EP (1) EP2829809B1 (de)
CH (1) CH708376B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2540148B (en) * 2015-07-06 2018-05-09 Quintex Systems Ltd Controlling contaminant build-up in an air extraction system
CN106051852B (zh) * 2016-05-23 2018-04-24 奇联电器(合肥)有限公司 一种净油吸油烟机
CN109059073B (zh) * 2018-01-11 2020-07-28 广东美的厨房电器制造有限公司 吸油烟机、用于吸油烟机的清洗系统、接头组件、支路接头部和外接头部
CN108758741B (zh) * 2018-06-29 2019-06-07 湖南迈清环保科技股份有限公司 一种具有过滤功能的厨房烟气净化智能机器人
CN110207205A (zh) * 2018-07-06 2019-09-06 华帝股份有限公司 一种吸油烟机自动清洗的控制方法及其控制系统
CN110567019A (zh) * 2019-09-19 2019-12-13 庞敏 一种易清理式抽油烟机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH638292A5 (fr) * 1979-11-21 1983-09-15 Giovanna H Sa Installation de hotte de ventilation.
CH683597A5 (fr) 1991-12-18 1994-04-15 Giovanna Sa H Dispositif de nettoyage de la grille-filtre et d'une hotte de cuisine.
CH692516A5 (fr) 1998-07-29 2002-07-15 Giovanna Sa H Hotte de cuisine autonettoyante.
CA2494814C (en) * 2002-08-16 2010-09-28 Kim Lui So Self-cleaning exhaust system and method
CN201954630U (zh) * 2010-12-17 2011-08-31 东莞市天驰厨具工程有限公司 环保型运水烟罩控制箱

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EP2829809A1 (de) 2015-01-28
CH708376B1 (fr) 2017-06-30
CH708376A2 (fr) 2015-01-30

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