EP0567200A2 - A self-cleaning hood for recirculating and purifying air - Google Patents

A self-cleaning hood for recirculating and purifying air Download PDF

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Publication number
EP0567200A2
EP0567200A2 EP93201191A EP93201191A EP0567200A2 EP 0567200 A2 EP0567200 A2 EP 0567200A2 EP 93201191 A EP93201191 A EP 93201191A EP 93201191 A EP93201191 A EP 93201191A EP 0567200 A2 EP0567200 A2 EP 0567200A2
Authority
EP
European Patent Office
Prior art keywords
hood
air
cylindrical elements
casing
cylinders
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Withdrawn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
EP93201191A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0567200A3 (enrdf_load_stackoverflow
Inventor
Sante Del Ben
Anita Leiber
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0567200A2 publication Critical patent/EP0567200A2/en
Publication of EP0567200A3 publication Critical patent/EP0567200A3/xx
Withdrawn legal-status Critical Current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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering

Definitions

  • the present invention relates to a recirculating hood by which air is extracted from a room, subjected to a depolluting treatment and returned purified to the room.
  • the invention relates to a hood for the household kitchen, designed for fitment to the bottom face of a wall unit in a position directly above a cooker hob, in such a way as to draw in and clean the flow of air polluted by the products of combustion and by greases released from foods in cooking.
  • Recirculating hoods do not require additional tubes or pipes to exhaust air to the external environment, but must incorporate a highly efficient purification system.
  • the most widespread purification system makes use of filtration panels fitted removably to the air intake of the hood.
  • the panels in question consist generally in a metal or plastics mesh serving to ensure that the more consistent particles of grease are neither returned to the room nor deposited on the body of the fan unit or the internal surfaces of the hood.
  • Recirculating hoods also utilize filtration panels with activated carbon granules.
  • Such filters have the capacity to adsorb vapour given off in the process of cooking, but will also release the vapour when invested by dry air; furthermore, the effectiveness of the adsorbing action is inversely proportionate to the increase in temperature and velocity of the flow of polluted air directed through the activated carbon.
  • activated carbon filters are impregnated with chemical reagents by which the pollutant substances are converted into compounds that remain fixed chemically to the activated carbons.
  • filters containing this type of activated carbon are necessarily disposable, as replacement becomes necessary once the absorption capacity of the chemical reagents has been used up.
  • the primary object of the invention is to provide a hood for recirculating and purifying air, suitable for mounting to the wall unit of a modular fitted kitchen, exhibiting compact dimensions and embodied in such a way as to overcome or minimize the drawbacks presented by prior art embodiments.
  • a further object of the invention is to rationalize the cleaning and servicing of the filter elements, limiting the requirement to occasional operations such as can be performed with ease by any given user.
  • 4 denotes a cooker hood consisting essentially in a flat hollow casing 5 of which the side uppermost is enclosed by a cover 6.
  • the cover is secured to the bottom face of a wait unit or cabinet (not illustrated) or other horizontal structure by means of screw fasteners insertable through a plurality of peripheral fixing holes 7.
  • the two flanks 8 of the casing 5 are fashioned with the top edges 9 bent at 90 toward the interior of the hood 4 in such a way as to engage slidably with corresponding lowered edge profiles 10 afforded by the cover 6.
  • the casing 5 of the hood 4 houses a self-cleaning device for the purification of polluted air.
  • a self-cleaning device comprises two hollow cylindrical elements 11 disposed one beside the other and supported in such a way as to allow rotatation about respective horizontal axes.
  • each cylinder 11 is composed of an inner wall 12 of mesh construction and a perforated outer wall 13 (fig 1), whilst the end of the cylinder 11 nearer to the source of the draught is open, and affords a respective pivot 14 projecting axially from a supporting diametral cross member 15.
  • the two cylinders 11 extend between two transversely disposed baffles 16 and 17 by which the space compassed within the casing 5 is divided into a central air intake and purification compartment 18, a lateral compartment 19 housing drive means by which the cylinders 11 are set in rotation, and a lateral compartment 20 from which air is exhausted following purification.
  • the central intake and purification compartment 18 also houses two respective wetting and washing vessels 21, and two condensate drip trays 22.
  • Each vessel 21 is positioned beneath a corresponding cylinder 11 with its two ends secured respectively to the two baffles 16, 17.
  • the single vessel 21 exhibits a substantially trapezoidal profile of which the longer parallel base is open and offered to the cylinder 11, and the shorter parallel base positioned at a given distance both from the periphery of the cylinder 11 and from the bottom wall 23 of the casing 5.
  • Figs 2 and 3 show the vessels 21 filled partly with a cleaning liquid 24 (e.g. water containing detergents and solvents) with properties capable of ensuring that the two cylinders 11 are both moistened and cleansed during operation of the hood 4.
  • a cleaning liquid 24 e.g. water containing detergents and solvents
  • the two drip trays 22 are positioned one beneath each of the two vessels 21, resting on the bottom wall 23 of the casing 5, in such a manner as to collect the droplets of condensate running off the external surfaces of the vessels 21.
  • the bottom wall 23 of the casing 5 affords a plurality of openings or holes 25, ordered in rows, through which the polluted air is drawn into the hood.
  • the baffle 17 compassing the lateral compartment 19 from which the cylinders 11 are driven is embodied with two vertical slots 26 serving to accommodate and support further respective pivots 14 extending from the adjacent ends of the two cylinders 11, which in this instance are enclosed.
  • Each of the two pivots 14 supported by this same baffle 17 carries a respective gearwheel 27, keyed to the projecting end of the pivot and engaged in meshing contact with a corresponding portion of a worm 28 rigidly associated with a rod 29 set in rotation about its own axis by a drive unit 30 (a geared motor, for example).
  • the baffle 16 compassing the lateral compartment 20 from which purified air is exhausted affords two circular openings 31 of which the passage matches the external cross sectional profile of the two relative cylinders 11 at the open ends. More exactly, the baffle 16 comprises a movable portion 32 comparable to a guillotine, of which the lower edge incorporates two semi-circular profiles constituting the top halves of the circular openings 31.
  • the cylinders 11 can be removed from the casing 5 if need be, for inspection and maintenance purposes.
  • the same lateral compartment 20 also houses two box elements 33, each having the top open to the space above and one side open to the adjoining baffle 16.
  • One top edge of each such element 33 affords a vertical slot 34 serving to accommodate and support the pivot 14 extending from the open end of the corresponding cylinder 11.
  • the inlet side communicates with the space encompassed by the compartment 20 by way of a circular port 36 fashioned in a relative mounting flange 37.
  • the outlet side of the fan unit 35 communicates with the surrounding environment by way of a quadrangular opening 38 created in the front wall of the casing 5.
  • the fan unit 35 and the geared motor 30 are connected to the electrical power supply by way of a circuit and a relative switch (conventional in embodiment and therefore not illustrated).
  • Rotation is now transmitted from the geared motor 30 through the rod 29 and the worm portions 28 to the two gears 27, thence to the cylinders 11.
  • the cylinders 11 rotate about their respective axes at an angular velocity (between 5 and 8 rev/min) such that the peripheral surface of each one is bathed constantly by a thin film of the cleaning liquid 24.
  • polluted air is drawn by the fan unit 35 through the holes 25 in the bottom wall 23 of the casing 5 into the central compartment 18 and forced to pass through the perforated outer wall 13 and the mesh inner wall 12 of the cylinders 11, thereby entering into contact with the film of cleaning liquid.
  • the particulate matter is washed from the wall of the cylinder 11 by passing through the bath of cleaning liquid 24 and made to settle at the bottom of the relative vessel 21.
  • the air thus purified is conveyed axially along the two cylinders 11, directed through the open ends into the relative lateral compartment 20, and returned ultimately by the fan unit 35 to the room via the opening 38 in the front of the hood 4.
  • hood 4 disclosed affords a greater purification capacity at lower energy consumption and noise levels than is obtainable with hoods of existing design.
  • the cylinders 11 might be more in number than the two described and illustrated, and the device by which the cylinders are set in motion might consist in a rack and pinion drive, in which case the rack would be reciprocated, causing the pinions and cylinders to rotate back and forth in alternation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)
  • Separation Of Particles Using Liquids (AREA)
  • Gas Separation By Absorption (AREA)
EP93201191A 1992-04-22 1993-04-21 A self-cleaning hood for recirculating and purifying air Withdrawn EP0567200A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN920035 1992-04-22
ITPN920035A IT1258072B (it) 1992-04-22 1992-04-22 Cappa autopulente di ricircolazione e purificazione dell'aria

Publications (2)

Publication Number Publication Date
EP0567200A2 true EP0567200A2 (en) 1993-10-27
EP0567200A3 EP0567200A3 (enrdf_load_stackoverflow) 1994-01-12

Family

ID=11394672

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93201191A Withdrawn EP0567200A2 (en) 1992-04-22 1993-04-21 A self-cleaning hood for recirculating and purifying air

Country Status (2)

Country Link
EP (1) EP0567200A2 (enrdf_load_stackoverflow)
IT (1) IT1258072B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114110681A (zh) * 2020-08-28 2022-03-01 青岛海尔智慧厨房电器有限公司 集成灶

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108386924A (zh) * 2018-03-17 2018-08-10 林辉 一种全智能的空气净化装置
CN118788147B (zh) * 2024-09-10 2025-01-10 内蒙古鄂尔多斯联合化工有限公司 一种脱碳系统溶液净化装置及方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3311381A1 (de) * 1983-03-29 1984-10-04 Heidolph Elektro GmbH & Co KG, 8420 Kelheim Vorrichtung zum befeuchten von luft
JPS60105848A (ja) * 1983-11-15 1985-06-11 Matsushita Electric Ind Co Ltd 除煙除油装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114110681A (zh) * 2020-08-28 2022-03-01 青岛海尔智慧厨房电器有限公司 集成灶

Also Published As

Publication number Publication date
ITPN920035A0 (it) 1992-04-22
EP0567200A3 (enrdf_load_stackoverflow) 1994-01-12
IT1258072B (it) 1996-02-20
ITPN920035A1 (it) 1993-10-22

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