EP0238780B1 - Unité de filtration pour ventilateurs de cuisine - Google Patents

Unité de filtration pour ventilateurs de cuisine Download PDF

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Publication number
EP0238780B1
EP0238780B1 EP86850032A EP86850032A EP0238780B1 EP 0238780 B1 EP0238780 B1 EP 0238780B1 EP 86850032 A EP86850032 A EP 86850032A EP 86850032 A EP86850032 A EP 86850032A EP 0238780 B1 EP0238780 B1 EP 0238780B1
Authority
EP
European Patent Office
Prior art keywords
filter assembly
air
bottom plate
deflecting devices
intake
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.)
Expired - Lifetime
Application number
EP86850032A
Other languages
German (de)
English (en)
Other versions
EP0238780A1 (fr
Inventor
Per-Martin Hedman
Sven-Olov Wallin
Gunnar Eriksson
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.)
Futurumverken AB
Original Assignee
Futurumverken AB
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 Futurumverken AB filed Critical Futurumverken AB
Priority to EP86850032A priority Critical patent/EP0238780B1/fr
Priority to DE8686850032T priority patent/DE3671098D1/de
Publication of EP0238780A1 publication Critical patent/EP0238780A1/fr
Application granted granted Critical
Publication of EP0238780B1 publication Critical patent/EP0238780B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F24C15/2035—Arrangement or mounting of filters

Definitions

  • the present invention relates to an oven extractor hood comprising a filter assembly which is of the kind which incorporates along the air-intake openings or ports of the filter air-deflecting devices in the form of mutually off-set rows of pin-like elements projecting towards the bottom plane of the filter.
  • the filtering function of filters of this kind is achieved by causing the air drawn into the filter to impinge against air-deflecting devices and, in so doing, release the droplets of grease entrained therewith, the air being unable to retain these droplets when decelerated as a result of impact against the air-deflecting devices.
  • a known labyrinth filter assembly is arranged to project out from the undersurface of the oven fan-extractor.
  • This filter assembly is square in shape and has identical air-intake ports on all four sides thereof, therewith ensuring uniform air flow.
  • a further known filter assembly of similar construction, is described and illustrated in SE-B 353 142 and has air-intake ports provided on three sides. Since the bottom surface of this filter assembly lies flush with the undersurface of the oven extractor-fan, the hood of the oven extractor-fan must also be provided with openings which communicate with the air-intake ports located in the sides of the filter assembly.
  • Another known labyrinth filter assembly has air-intake ports arranged along solely the front edge of the filter assembly.
  • An object of the present invention is to provide a filter assembly of the aforesaid kind which has air-intake ports provided along three sides thereof and lies flush with or inwardly of the defining edge of the undersurface of the extractor hood, and which is so formed as to avoid the necessity of providing air-intake openings in said hood.
  • a further object of the invention is to form the air-intake ports and the air-deflecting devices in a manner which provides a favourable air-flow, at the same time as the port or opening through which air is drawn into the filter assembly has a maximum length across the oven.
  • the oven extractor-fan illustrated in Figure 1 in- dudes a fan wheel provided with a horizontal driveshaft and enclosed in a vermiform housing 1, as indicated by broken lines in Figure 1.
  • the fan housing is surrounded by an oven fan-extractor hood 2 which is fitted with lights 3 along the short sides thereof.
  • a filter assembly 4 Located between the lights 3 is a filter assembly 4, which is fitted into a recess in the hood 2 so that the bottom surface of the filter assembly lies flush with the undersurface of the hood.
  • the filter assembly 4 is supported by the extractor hood 2 by causing the rear edge of the filter assembly to rest on a lower flange provided on the hood, and by engaging two resilient latching hooks projecting from the front edge of the filter assembly behind an inwardly folded edge of the upper defining side of an opening or recess in the extractor hood 2.
  • the filter assembly can thus be detached readily from the extractor fan, by swinging the assembly down about its rear edge and then disengaging the hooks from the aforesaid recess defining edge, whereafter the assembly is moved obliquely downwards and forwards, until the rear edge no longer rests against the lower flange of the extractor hood.
  • the fan extractor includes an adjustable front screen 5 which can be swung out from the extractor hood, so as to increase the extent at which fumes rising from the front part of the oven are taken into the extractor.
  • the extractor hood also has arranged thereon a panel 6 with switches for operating the fan and the aforesaid lighting.
  • FIG 2 illustrates the filter assembly 4, with the top plate 7 removed therefrom.
  • the outer defining surfaces of the top plate coincide with the outer defining surfaces of the bottom plate.
  • the position taken by the inner defining surfaces of the top plate 7 when fitted to the filter assembly is shown in broken lines in Figure 2, and it will be seen that the top plate covers the inner rows of air-deflecting devices 10.
  • the top plate 7 has a recess formed in the front side thereof, to facilitate inward bending of the aforesaid latching hooks on the filter assembly 4.
  • the top plate is referably arranged so as to be readily removable from the remainder of the filter assembly, to enable the assembly to be cleaned more easily.
  • air-intake slots 9 Arranged along the side edges of the bottom plate 8 are air-intake slots 9 through which air is drawn by suction and which are provided with a plurality of pin-like deflector devices 10. Arranged between the top and bottom plates of the filter assembly along the front thereof is further air-intake opening in the form of a slot 11, which also incorporates air deflecting devices 10.
  • Two further rows of air-deflecting devices extending perpendicularly from the bottom plate are arranged along the three air-intake slots.
  • the flow of air through the front air-intake slot 11 is substantially parallel with the channel formed by the bottom plate 8 and the top plate 7, and subsequent to passing through the channel it is deflected upwardly by the inner defining surface of the top plate, towards the fan air-intake slot through which air is drawn into the fan.
  • the deflecting devices 10 located in the air-intake slot are thus equally as effective as the deflecting devices located in the two rows of deflecting devices extending vertically along the front edge of the bottom plate, the deflecting devices 10 in respective rows of deflecting devices being equally spaced one with the other, and the three rows being spaced at mutually the same distance apart.
  • the deflecting effect behind an air-deflecting device will decrease relatively quickly, and hence the residual deflection effect of that part of the in- drawn air-flow striking the upper part of the deflecting devices in the first row of devices on the bottom plate is small.
  • the upper parts of the deflecting devices located along each side of the filter assembly must provide the same filtering effect as the three rows of deflecting devices located along the front edge of the filter assembly.
  • the deflecting devices present in the rows extending along the sides of the bottom plate are placed closer together than the deflecting devices present along the front edge of the bottom plate, and as close as possible to the air-intake slots provided in the bottom plate.
  • the as- sumingly symmetrical curved path of the air flow in the side channels solely constitutes an ideal picture of the flow pattern, and that many factors influence the air-flow, such as the intake flow, the velocity of the air, and the interference between deflected air flows.
  • the ideal pattern of air-flow is sufficient to illustrate qualitatively that the extent of the co-action between the deflecting devices located in the intake slots and the deflecting devices located on the bottom plate will decrease in correspondence with increasing distances between corresponding locations in the flow path.
  • the deflecting devices along the sides of the bottom plate have been placed closer together in the rows than the deflecting devices located along the front edge, their relative flow resistance will be greater. Consequently, in order to achieve the same intake velocity in all intake slots or ports, the intake slots located along the sides of the filter assembly are narrower than the air-intake slots located along the front side thereof, and are also provided with fewer deflecting devices per unit of length.
  • the invention thus provides a filter assembly which has air-intake slots provided along the front edge and both sides thereof. Because the side intake slots are formed in the bottom plate, it is no longer necessary to provide side intake ports in the extractor hood, which means in turn that the air-intake slot along the front of the filter assembly can be made longer, so as to cover a greater part of the width of the oven than was previously possible.
  • Cleaning of the extractor fan is simplified by the fact that all air-intake channels are formed in the readily removed filter assembly. Cleaning can be further simplified to a small extent, by providing the bottom plate with upstanding side walls, although the benefit afforded hereby from a cleaning aspect is very slight, since the greater part of the grease droplets are separated from the air on the deflecting devices.

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

Claims (4)

1. Une hotte aspirante pour appareil de cuisson comprenant une structure de filtration prévue pour l'utilisation avec des ventilateurs, et du type comprenant des dispositifs de déviation d'air le long des ouvertures d'entrée d'air de la structure de filtration, ces dispositifs comprenant des rangées mutuellement décalées d'éléments en forme de tiges (10) s'élevant à partir du plan inférieur de la structure de filtration, dans laquelle la structure de filtration (4) comprend une plaque inférieure (8) et une plaque supérieure (7) qui s'étend le long du bord avant et des bords latéraux de la plaque inférieure et qui a une largeur au moins suffisante pour que la plaque supérieure (7) recouvre les rangées de dispositifs de déviation d'air (10), afin de former des canaux d'entrée d'air (9, 11) en association avec des parties correspondantes de la plaque inférieure; dans laquelle l'ouverture d'entrée d'air située le long du bord avant de la structure de filtration consiste en une fente (11) se trouvant entre la plaque inférieure et la plaque supérieure et s'étendant sur la totalité du côté avant de la structure de filtration; dans laquelle les ouvertures d'entrée d'air situées le long des bords latéraux de la structure de filtration se présentent sous la forme de fentes (9) formées dans la plaque inférieure; et dans laquelle la surface inférieure de la plaque inférieure (8) affleure la surface inférieure de la hotte aspirante (2) ou est en retrait par rapport à celle-ci.
2. Une hotte aspirante pour appareil de cuisson comprenant une structure de filtration selon la revendication 1, caractérisée en ce que les fentes (9) dans la plaque inférieure sont plus étroites que la fente (11) entre les plaques supérieure et inférieure.
3. Une hotte aspirante pour appareil de cuisson comprenant une structure de filtration selon la revendication 2, caractérisée en ce que la distance entre la première rangée de dispositifs de déviation d'air (10) et des ouvertures d'entrée d'air respectives (9, 11) est plus faible sur les côtés de la structure de filtration (4) que sur le bord avant de celle-ci.
4. Une hotte aspirante pour appareil de cuisson comprenant une structure de filtration selon l'une quelconque des revendications précédentes, caractérisée en ce que la distance entre les dispositifs de déviation d'air (10) dans les rangées précitées est plus faible sur les côtés de la structure de filtration que sur le bord avant de celle-ci.
EP86850032A 1986-02-03 1986-02-03 Unité de filtration pour ventilateurs de cuisine Expired - Lifetime EP0238780B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP86850032A EP0238780B1 (fr) 1986-02-03 1986-02-03 Unité de filtration pour ventilateurs de cuisine
DE8686850032T DE3671098D1 (de) 1986-02-03 1986-02-03 Filtereinheit fuer kuechengeblaese.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86850032A EP0238780B1 (fr) 1986-02-03 1986-02-03 Unité de filtration pour ventilateurs de cuisine

Publications (2)

Publication Number Publication Date
EP0238780A1 EP0238780A1 (fr) 1987-09-30
EP0238780B1 true EP0238780B1 (fr) 1990-05-09

Family

ID=8196516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86850032A Expired - Lifetime EP0238780B1 (fr) 1986-02-03 1986-02-03 Unité de filtration pour ventilateurs de cuisine

Country Status (2)

Country Link
EP (1) EP0238780B1 (fr)
DE (1) DE3671098D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008020149A1 (de) * 2008-04-22 2009-10-29 BSH Bosch und Siemens Hausgeräte GmbH Filtereinheit für eine Dunstabzugsvorrichtung und Dunstabzugsvorrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE353142B (fr) * 1970-01-30 1973-01-22 N Bergmark

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2528275A1 (de) * 1975-06-25 1977-01-13 Gaggenau Werke Dunstabzugshaube mit herausnehmbarem filtereinsatz
DE7722223U1 (de) * 1977-07-15 1979-01-11 Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart Luftreinigungsgeraet, insbesondere kuechen-dunstabzugshaube o.dgl.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE353142B (fr) * 1970-01-30 1973-01-22 N Bergmark

Also Published As

Publication number Publication date
DE3671098D1 (de) 1990-06-13
EP0238780A1 (fr) 1987-09-30

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