WO2018127902A1 - Hotte de cuisine améliorée - Google Patents

Hotte de cuisine améliorée Download PDF

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Publication number
WO2018127902A1
WO2018127902A1 PCT/IL2017/051333 IL2017051333W WO2018127902A1 WO 2018127902 A1 WO2018127902 A1 WO 2018127902A1 IL 2017051333 W IL2017051333 W IL 2017051333W WO 2018127902 A1 WO2018127902 A1 WO 2018127902A1
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WO
WIPO (PCT)
Prior art keywords
hood
unit
hood unit
cooking
fumes
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.)
Ceased
Application number
PCT/IL2017/051333
Other languages
English (en)
Inventor
Yuval-Yoni DAHAN
Abraham Dahan
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.)
Unito Smart Technologies Ltd
Original Assignee
Unito Smart Technologies Ltd
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 Unito Smart Technologies Ltd filed Critical Unito Smart Technologies Ltd
Publication of WO2018127902A1 publication Critical patent/WO2018127902A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F24C15/2078—Removing cooking fumes movable
    • F24C15/2085—Removing cooking fumes movable adjustable in height
    • 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

Definitions

  • the present invention relates to a moving kitchen hood apparatus located above the cooking area, having improved performance, safety features, easy maintenance and cleaning.
  • a kitchen hood is a device located above the stove to ventilate the area above the cooking area, to capture the hot air carrying contaminations, including odors and particles of steam, grease and smoke. The air is then transferred through an exhaust duct to the external environment or returned back to the kitchen after being filtering.
  • Most of kitchen hoods include powerful blower, and a large funnel-shaped covering canopy, beside additional functional and control elements.
  • the hoods are usually located above the stove in a relatively high distance from the cooking area and require strong sucking means, the large amount of the processed air resulting in high noise and less efficient ventilation. There were attempts to improve the hood performance, including US20080135042, which reduces the required airflow through the hood by employing an arched interior hood surface.
  • US6647978 provides telescope movement of the hood elements to their operative and non- operative positions.
  • JP2004211911 provides a hood allowing condense and catch oil mist on an easily removable filter.
  • JP2005030728 provides a hood which is positioned on a cooking table only during the cooking activity, while being stored in the cooking table when not used, ensuring a free space and line of vision when not used, as well as simplified cleaning.
  • US 20070261693 relates to a hood being installed on a cooker hob, on the surface of a support unit, the hood including a flame shield element, and anti- grease filters, and a glass panel rising perpendicularly from said element and conducting the fumes into a special discharge duct.
  • WO 2015/071898 addressed the problem of the reduced free space around the cooking area, as well as the need to increase the efficiency of the evacuation process and to reduce the associated noise, by providing a split hood; the split hood divided the ventilation power of the system to several smaller independent units which, in addition, were flexibly drawn nearer to the cooking area when needed.
  • the present invention further improves the split hood. It is therefore an object of the invention to enable an easy disassembly, cleaning, and replacing consumable parts of the hood.
  • the present invention provides an autonomous kitchen hood unit for evacuating the cooking fumes comprising, beside the air, gaseous and liquid components from above a cooking area, the area being defined by the upper surface of an electrical or gas stove, said unit comprising i) an inlet through which said fumes enter the evacuation unit; ii) a rectifying screen situated above said inlet for collecting said liquid components or said gaseous components after condensation from said fumes; iii) a blower situated above said screen for creating a suction force to draw said fumes with surrounding air into said inlet; iv) a duct for transferring said air, at least partially rid of said components, either back to the kitchen or through an exhaust system out of the building; and v) lifting means for lowering said inlet nearer to said cooking area and for lifting said inlet farther from said cooking area, comprising a cable or other means connecting the hood unit with ceiling, and in a preferred embodiment a spring configured to absorb at least part of the potential energy of the hood unit during its downward movement
  • the hood unit of the invention is an autonomous hood unit, wherein said blower is a radial blower embedded in said hood unit and integrated with said inlet, rectifying screen, and said duct; so that the lifting means lift and lower also the blower.
  • An important feature of the hood according to the invention is its configuration enabling to minimize sucking clean air into the hood, in other words enabling to maximize the volume ratio of the air with cooking fumes to the uncontaminated air drawn from the space outside the cooking area, so that the gas sucked into the hood inlet has maximal concentration of the contaminants.
  • the hood unit of the invention is configured to be easily disassembled and cleaned.
  • the hood unit is occasionally self- cleaned when said gaseous components consist mainly of water steam, as the steam condenses in relatively clean water which washes the inner parts of the hood unit as it flows to the collector. Occasionally, clean water or water with cleaning agents may be boiled under the hood unit to enable self- cleaning.
  • said inlet has a surface which is less than the surface of said cooking area; in other embodiment the inlet has a surface which is greater than or equal to the surface of said cooking area.
  • Said screen comprises at least one polymeric or metal inclined surface. Said screen comprises at least one inclined surface along which drops originating from said gaseous or liquid components flow, and a collector in which said drops are stored.
  • said inclined surface comprises a plastic or metal plate.
  • the inclined surface comprises a plastic or metal network member.
  • the screen comprises two nonparallel members, an optional upper member and a lower member comprising said inclined surface, through which said fumes can ascend, and a liquid collector to which the liquid removed from said fumes arrives from said members by gravity, the members comprising at least one metal or polymer network layer.
  • said upper member comprises a horizontally situated planar member, for example a network layer
  • said lower member comprises a trench or a depression from which said liquid flows by gravitation to said collector.
  • the shape of said inclined surface or said lower member may comprise two planes or pyramid or cone, wherein the intersection of said two planes or the apex of said pyramid or cone form said trench or depression.
  • Said metal or polymer networks comprise holes which do not put resistance to the ascending fumes but capture drops of said liquid.
  • Said inclined surface serves as a guiding, rectifying, element to direct the returned liquid or condensed gas from the cooking fumes into the drain.
  • said blower is a radial blower.
  • Said blower is preferably embedded in said hood unit so that the rotation axis of its blades is situated horizontally.
  • the cross-section area of said duct is less than the area of said inlet.
  • the duct comprises an extendable tube.
  • the duct is easily accessible for disassembly, periodical cleaning, and maintenance; in a preferred embodiment, the duct is disposable or comprises a disposable inner tube.
  • the lifting means preferably comprise a motor.
  • the lifting means also enable manually moving the unit in the vertical direction.
  • the lifting means comprise means for employing gravity for downward movement and the spring force for the upward movement.
  • the lifting means may further comprise a means for horizontally changing the position of the unit above the cooking area.
  • the hood unit is automatically lowered nearer to the cooking area and the blower is activated when heat starts to be produced in said cooking area.
  • the hood unit of the invention may comprise sensors for detecting overheat or for detecting an obstacle in the movement path.
  • the duct is preferably enclosed within an esthetically acceptable protective tube; electrical wires feeding the blower or eventual lights or other electrical components are preferably integrated in said protective tube, as well as the cable.
  • the blower is fed from a battery.
  • the invention relates to composite hood comprising at least two hood units described above.
  • the units are operated independently of each other.
  • the hood units are attached to a common box embedded in the ceiling or positioned between the ceiling and the cooking area; in one embodiment said box comprises the lifting means for all the hood units, optionally additional sucking means supporting said radial blowers, and optionally regulation means for optimally managing the stove and the hood.
  • the hood of the invention evacuates the cooking fumes from above a cooking area defined by the upper surface of an electrical or gas stove accommodating a number of electrical hot plates, such as resistive or induction plates, or a number of gas burners, wherein at least some of the evacuation units are automatically activated when at least some of plates or burner work, the evacuation units which are active are lowered nearer to the working electrical hot plates, nearer to the working burners, or nearer to the working point on the electrical inductive plate (active cooking sites) and/or are shifted to be above the active cooking sites; while said lifting means precisely and optimally adjust the position of the units above said the cooking sites.
  • electrical hot plates such as resistive or induction plates, or a number of gas burners
  • the hood of the invention preferably comprises sensors for detecting overheat or obstacles in the path of the hood units, and means for at least one action selected from the group consisting of starting an alarm, stopping heating elements, stopping the movement of the hood units, lifting the hood units, stopping the blowers, and extinguishing flames.
  • the hood of the invention further preferably comprises control means configured to store and transfer data and signals, and to regulate the work of the stove and the hood.
  • the control means may comprise the communication with cloud or a mobile device such as smartphone, tablet, or local hub, and they may comprise activities selected from the group consisting of processing data from sensors, processing data from a camera, increasing safety of the cooking process, and increasing the efficiency of the energy consumption; whereby ensuring healthy kitchen ambience, lowering the energy consumption, and reducing noise level, compared to a non-composite hood.
  • the hood of the invention preferably comprises a control unit which is configured to regulate the temperature of the heated pot to follow a predetermined time/temperature regimen or cooking temperature-time profiles and cycles, possibly downloaded from the internet, cloud, or from the memory storage, so as to prevent overflowing or overcooking the cooked pot contents.
  • Fig. 1 shows a kitchen hood apparatus unit according to one embodiment of the invention, with an extendable pipe, comprising air inlet direction (l), hood main unit (2), light signal (3), and extendable pipe (4);
  • Fig. 2. shows a kitchen hood set arrangement according to one embodiment of the invention, comprising a top box including shield to protect the moving duct, and several hood units 4 with light signals 5 attached to the common top box base (l), having extendable pipe (3), and being surrounded by protective tube (2);
  • Fig. 3. shows kitchen hood arrangements according to one embodiment of the invention, comprising individual hood units attached in a common holding base positioned at different heights between the ceiling and the cooking area, the units possibly having a transparent enclosure and a lightening surrounding;
  • Fig. 4. shows another hood arrangement according to one embodiment of the invention, comprising hood unit 4 provided with a protective frame 1 with control panel 3, and removable control unit 2 attached to it;
  • Fig. 5. is a schematic view of a kitchen hood according to one embodiment of the invention, showing a cleaning system, including condensing cycle for filtering and self-cleaning; the condensing cycle removes oil and grease vapor from the air, which is sucked into the hood unit of the invention and released back to the environ as clean and dry air, either being recycled inside the kitchen or being led through an exhaust duct out of the building;
  • Fig. 6. is a top view and a side view of the motor system in a hood according to one embodiment of the invention; a spiral spring (4) absorbs potential energy of the hood unit moving down and releases it back when moving up, contributing to smooth operation and reducing the power required from the motor for the lifting stage;
  • Fig. 7. is a cross-section view of a hood unit according to one embodiment of the invention, showing the inner parts and the orientation of the radial blower, the specific blower orientation prevents the twisting move (rotation) of the hung hood unit; further shown is a rectifying screen (3), acting as a collector for collecting the oil from the cooking vapor, constructed of two parts: a flat filter and a conically shaped mesh filter made up of one or more layers of metal mesh;
  • Fig. 8. shows a metal or plastic duct pipe, preferably extendible and optionally disposable, for implementing in as kitchen hood unit according to one embodiment of the invention
  • FIG. 9 schematically illustrates extendable pipe, comrising a spring 2, and integrated electrical wires 3, with electrical connectors 1 at both ends to be employed in a hood unit according to one embodiment of the invention
  • Fig. 10 illustrates a sensor system incorporated in hood unit according to one embodiment of the invention including magnet 2 fixed at the travel limit, and sensor 1 within a flexible housing 6 and 7, part 7 being attached to the cable; the sensor stops the motor electrically when sensing the magnet; the housing is designed to stop the movement mechanically to prevent the hood from moving out of the travel limit; when magnet 2 reaches the travel limit, the sensor 1 detects the magnet and sends a signal to the control unit to stop the motor; for safety, the system includes a second back up option to stop the movement ⁇ if motor continues to move the cable 4, which is connected to the lower part of the magnet housing 6 with body 5, spring 3 will be compressed between immobile upper housing 7 and lower housing 6, thereby pulling up the lower magnet housing 6; and Fig. 11.
  • FIG. 1 schematically demonstrates the integrated system control of the kitchen hood with the cooker, including communication among the system parts in a hood system according to one embodiment of the invention, comprising integrated control unit of the kitchen hood with a stove, remote control unit such as smart phone fire hazard control, and the means for following the cooking cycles and regimens, possibly including time-temperature predetermined profiles, and preventing overflow of the cooking liquids.
  • a movable kitchen hood unit comprising a cleanable or disposable air duct, a spring spiral for absorbing kinetic energy of the unit's downward movement, and advantageously a radial blower, provides an efficient and comfortable evacuation of the cooking fumes from the cooking area.
  • the kitchen hood of the present invention is structured to approach close to the cooking area, suck the contaminated hot air above the cooking area, direct it into an optionally disposable pipe duct having small cross section.
  • the moisture contained in the hot air is condensed, transmitting it's latent heat through the pipe walls and the relatively dried and cleaned air is either returned to the kitchen environment or moved through an exhaust system to the outside environs.
  • the hood can reduce or eliminate the air contaminants without need for installing a conventional filter to filter the air.
  • the fumes produce condensed liquid drops that drip down toward a trap.
  • the contaminant condensation from the sucked air may generate a grease layer over the time; the new kitchen hood addresses this potential problem and enables to easily disassemble and clean or replace the air duct.
  • the new kitchen apparatus of the present invention represents significant improvement over prior kitchen hood apparatuses, providing efficient solution for cleaning the hood elements from grease and reducing the fire hazard.
  • the present invention further provides sophisticated movement system to lift and lower the kitchen hood unit, resulting in smooth and secure movement of the hood unit up and down, and minimizing the effect of the blower centrifugal force on twisting the hood unit around the vertical axis.
  • the moving hood unit of the invention reduces the danger to human subjects, either hood users or incidental dwellers, being wounded by wide hood parts sticking around, while also protecting against overheating and fire hazard via attaching sensors to the moving hood unit, or to other parts of the system, which detect objects in the path of the movement, and detect overheat or flame; emergency reactions include one or more steps selected from lifting the hood unit, stopping the blower, stopping the stove heating element, or distinguishing the flame.
  • the hood unit according to the invention stores the energy of the downward movement for its later release when the hood is lifted.
  • One or more springs contribute to storing the kinetic energy of the downward movement, and eventually also to balancing the weight of the hood unit or units.
  • Another advantage of the hood unit according to the present invention is an easy replacement and cleaning of the hood elements, particularly the pipe ducts; in one embodiment the ducts are easily washed, in another embodiment the ducts are disposable and are easily replaced, so also minimizing the risk of fire.
  • An important feature of the hood unit is a contaminants screen, obviating the use of filtration media, for removing the aerosol particles from the cooking fumes, including solids and liquids; preferably, comprising metal net with sufficiently small holes to allows the sucked contaminated air flow through the screen up to the pipe duct, while preventing the condensed liquid from dropping back to the cooking area by guiding it to collecting drainage container.
  • the pipes used as air ducts or for wire accommodation are preferably surrounded by a cylindrical coat, which protects and hides the moving parts and heated elements from direct touch, and adds an esthetic value to the hood appearance.
  • the hood units of the invention are connected to a common base, either built in the ceiling or located under the ceiling; the base may comprise a control panel.
  • Control units or elements may be attached to each of the hood units.
  • sensors are employed, including sensors integrating the movement path, connected to mechanical stoppers, which still more increase the safety of the whole moving system.
  • Another part of the hood control system of the present invention is employing mobile devices, such as smartphone and applications associated with it.
  • the kitchen hood control system is integrated with the cooker controller for synchronizing the hood with the cooker, and it communicates with devices such as stove, and optionally other appliances such as air conditioning system, water system, alert systems, digital data system including recording the activities, whereas the integrated kitchen control system may communicate with cloud for transmitting data, transfer alerts, including alerts for the needed service, and store data.
  • the hood system is equipped with camera and heat sensors integrated either in the hood units or close to them, or in the stove for regulating the heat and temperature of the cooking device to control the heating and cooking and protect the system from overheating, or overcooking, or overflowing of the cooked food, and from fire hazard.
  • the kitchen hood system of the invention is preferably provided with lights ensuring the safe and pleasant illumination of the working area, as well as signaling important stages or situations, either associated with cooking or with alerts, enabling to the user get instantly updated about the hood system status; various colors, advantageously also employing LED elements add to the hood esthetic appearance, and its safe and easy operation.
  • the kitchen hood apparatus suffer from widely known phenomena of accumulating grease which results in bad smell, and also becomes a fire hazard.
  • the kitchen hood must be inspected regularly, to determine whether cleaning is needed before a dangerous amount of grease has accumulated.
  • the cleaning process usually requires the assistance of specialists providing the service.
  • the need exists for simple kitchen hood apparatus that has self- cleaning abilities or which can be easily disassembled for cleaning and replacement of consumable or disposable parts.
  • the invention addresses the need.
  • the invention relates to a moving hood apparatus including an extendable pipe or wire, capable of moving downward towards the cooking area and back to its high position when not being in use.
  • the close distance of the hood unit from the cooking area substantially reduces energetic requirements and system noise, and reduces the volume of the processed air.
  • the sucked air containing a concentrated moisture is guided upward into the pipe duct through an oil-removing screen, "one direction filter", located in the inlet part of the hood unit, allowing the moisture air moving upward and preventing the condensed drops from falling back to the cooking area.
  • the condensed liquid drips down along the pipe by gravity back to the upper side of the screen, rectifying screen, which prevents the liquid from dripping back to the cooking area and guides the condensed drops into a collecting container located below.
  • the clean air remained in the pipe duct is then led through an exhaust system out of the kitchen or returned back to the kitchen environment.
  • carbon filter is employed to remove odors from the air returned to the kitchen.
  • the rectifying screen is an element that allows the sucked air go through or around but prevents the liquid go through.
  • the screen has members which may comprise one or several layers, for example metal or polymer networks.
  • the members may exhibit, for example, a planar shape with mild slope, or another two- dimensional shape with a slope, the slope leading the condensed liquid to a collector which may comprise a detachable vessel located below.
  • the drainage vessel is easily detached for emptying and cleaning purpose.
  • the air ducts of the hood units according to the invention may be disposable and are regularly replaced, in one embodiment; in another embodiment, the ducts are easily released and cleaned; in a still another embodiment, the ducts are cleaned in situ by a self-cleaning process at any time when water is boiled, or by periodically boiling clean water or a mixture of water and cleaning agents under the kitchen hood; the hood unit sucks the water steam or the mixture of water steam with the agent and washes the inner parts of the unit, whereas the condensed liquid removes the contaminants into the drainage container.
  • the hood apparatus of the present invention includes, in a preferred embodiment of the invention, a radial blower adopted for sucking the relatively small air amount with high pressure drop required due to the small pipe duct cross section.
  • a radial blower adopted for sucking the relatively small air amount with high pressure drop required due to the small pipe duct cross section.
  • the use of a radial blower in a hung device may show serious problems, as the rotation of the rotating parts of the blower may cause twisting or rotating the whole hung device around the vertical axis, particularly when turning the blower on and off; the invention overcomes the problem by embedding the blower in the hood unit of the invention in a special position, minimizing the effect.
  • the hood unit of the invention comprises a radial blower embedded in such a position that the blower rotation axis is situated horizontally.
  • hood unit of the invention is a smart motion mechanism; it changes the vertical position of the hood unit, while comprising spiral spring (preferably constant force spring) attached to the motor and to be compressed by downward movement of the hood unit, whereby storing the energy, which is released when the unit moves upward.
  • Additional linear coil spring maybe integrated between the hung hood unit and the top mounting to balance the hood unit weight.
  • the two springs reduce, independently, the power required from the motor and increase the motor efficiency.
  • limit sensors are integrated in the moving system and provide signals to the control unit to indicate the limit movement points which are reached.
  • Mechanical adjustable stoppers are attached to provide backup to the control unit in case of controller failure; overcurrent detectors may also stop the movements.
  • the hood unit of the invention is preferably provided with the means which reduce the risk of accidental collision between the moving hood and any potential obstacle positioned within the travel length of the hood apparatus.
  • obstacle may be, for example, a high device left on the cooking area, or user's body.
  • the means comprise sensors detecting the objects in the hood's movement path.
  • the sensor may comprise proximity sensor, or camera, or other means.
  • Optical and/or thermal sensors may further increase the safety of the cooking process.
  • a heat sensor, integrated in the hood system may provide an alert, or may automatically move the units upward, or shut the blower down, or reduce the power of the stove heating element, and may also start an extinguishing action.
  • the invention aims at providing a kitchen hood which is easily disassembled, cleaned, while replacing its consumable or disposable parts, in particular the air ducts requiring the removal of oil and grease and other contaminants deposits.
  • the invention provides an improved kitchen hood system which is flexible and relatively simple, and requires simpler maintenance.
  • the hood can be easily and flexibly controlled with any available communication means, including smart phones, together with the associated cooking and ventilation equipment of the kitchen as further explained.
  • a single moving hood apparatus attached to extendable pipe is presented in high and low position.
  • the kitchen hood unit 2 has the air entrance 1, a light signal 3 showing the status of the hood such as on/off, fan intensity work, communicating etc., shield 4 protects the user from touching the moving parts.
  • Fig. 2 represents a set of the hood units 4 combined by common top box 1.
  • the extendable pipe 3 is protected by pipe shield 2.
  • Fig. 3 represents a moving kitchen hood in several arrangements, showing a few possible shapes of the top box attached directly to the ceiling or positioned at different locations below the ceiling, comprising up to four hood units.
  • Another options shows a hood unit connected to an extendable pipe.
  • the upper box is either connected to the ceiling or lowered to be positioned between the ceiling and the cooking area.
  • Fig. 4 illustrates one embodiment exhibiting a protective frame 1 surrounding the set of hood units, control panel 3 with detachable unit 2.
  • Fig. 5 demonstrates another significant improvement provided by the invention.
  • the planar element 12 supports the condensation filtering cycle system and may serve as humidity and/or odor trap.
  • the inclined surface 13 is preferably a network screen allowing the air flow upward and capturing the returned condensed liquid drops, and guiding them to the collecting drain.
  • the inclined surface may comprise any shape, including cone or pyramid. The hot air flows towards the pipe duct through the screen or bypassing it.
  • the screened air 6 then moves out of the hood apparatus and is either returned to the room or led through an exhaust out.
  • the condensed drops 3 slide down towards the depression or trench in part 13 of the rectifying screen that guides the liquid to drainage container 15.
  • An optional moving system includes motor 7 with wire 8 controlling the height of the hood (detailed in Fig 6).
  • Fig. 6 shows top and side view of a motor, such as the one mentioned in Fig. 5, being a part of the hood height change mechanism.
  • Motor 1 with gear 2 is attached to wheel 3 for winding and releasing the wire holding the hood; a spiral spring preferable of a constant force, 4 , is attached to the motor shaft.
  • Fig. 7 shows a cross-section view of rectifying screen and radial blower in a hood unit according to one embodiment of the invention, which releases the air back to the kitchen surroundings, including blower 1, flat screen part 2, conical screen part 3 that leads the returning condensed liquid into drainage container 6 positioned in the front air entrance surface 5. The air is released from opening 4 to the kitchen surroundings.
  • Fig. 8 shows extendable pipe ducts in one embodiment, when pipe material can be metal or plastic; the pipe may end with adaptors for quick connecting and disconnecting.
  • Fig. 9 is a drawing illustrating an extendable duct pipe, for one embodiment of the hood unit of the invention, with a linear coil spring and with electrical wires 2 and 3 integrated in the duct wall. Both ends of the electric wire are provided with a connector 1 for quick connecting and disconnecting the pipe for cleaning or replacing.
  • the spring (preferably tension spring suitable for pulling force) is integrated into the pipe duct wall to balance the hood and the tube weight, pulling the pipe to its short length.
  • the pipe is attached at its upper side, for example to the ceiling box. When the hood moves down, the hood weight pulls the pipe and stretches the spring, which absorbs and stores the energy proportionally to the extension, releasing it when the hood moves up and shrinking the pipe to its shortest length.
  • Fig. 10 shows a limit sensor for a hood unit of the invention, with a flexible housing allowing the motor stop after receiving an alert signal.
  • the unit includes a magnet 2 attached to the housing.
  • the flexible housing comprises upper part 7, lower part 6, spring 3, and sensor 1 located at the travel limit point, the sensor being designed to stop the motor electrically when reaching the travel limit; for safety reason, the housing of the magnet sensor is designed to stop the movement mechanically and to absorb the energy by the internal spring; when magnet unit 2 arrives to the travel limit stop, the sensor 1 detects it and sends signal to stop the motor; in case the motor does not stop due to system failure, upper magnet housing 7 is mechanically stopped, lower magnet house 6 is pulled up by cable 4 which is attached to the cable by component 5, the spring 3 is then compressed between the stopped upper housing 7 and the lower housing 6 which is pulled up, the spring compression results in an increased current consumed by the motor; the increased current is detected by the control unit and the motor is stopped.
  • Fig. 11 illustrates a kitchen hood controlling system 2 which is integrated with the controller 1 of the cooking device, in accordance with one embodiment of the invention, in the form of a communication block diagram, comprising cooker elements 3, sensors 6 and 9 integrateted in the hood system, and sensor 5 attached to the cooking element, representing heat sensors and camera.
  • the heat sensors control the temperature of the cooked content
  • camera 9 with a suitable software application protects the food from overcooking, overflow, and also follows pre-programed cooking time profile cycles adopted to a veriety of cooking options being stored in the data storage system, such as tablet, smart phone, or being downloaded from the cloud.
  • the overflow is prevented by limiting the stove or pot temperature to remain below the overflow temperature defined by the user or by a suitable controlling means.
  • the communication between the kitchen hood control means 1 and the stove control means 2 enables the coordination and amangement of the two synchronized systems.
  • the usually employed metal cartridge filters are quite expensive, and their cleaning and reusing, particularly when accumulated grease and oil are concerned, is both time consuming and difficult.
  • the rectifying screen in a hood unit of the invention is easily accessible and treatable. Drawing the hood unit of the invention nearer to the cooking area reduces the amount of clean air from the kitchen which dilues the contaminated cooking fumes, substantially increasing the evacuation efficiency in terms of the processed air volumes and total energy. Moreover, the contaminants are less diluted and therfore better removed.
  • the hood according to the invention aims at high ratio of the sucked fumes volume and the volume of the sucked surrounding clean air.
  • the hood of the present invention reduces energy losses and reduces the noise level, while increasing the fumes filtering efficiency.
  • the easily cleanable, or self-cleaning, system employed in the invention combined with the option of easy disassembly, cleaning and/or replacing consumable and/or disposable parts, such as pipe ducts, reduces the risk of fire, and reduces the cost of the maintenance needed.
  • the kitchen hood apparatus comprises one or more moving hood units, whereas each single kitchen hood unit is easily disassembled for periodically cleaning and maintenance.
  • the kitchen hood apparatus is attached to a motor system to lift the units up or down, preferable employing gravity force when moving downward by employing spring force when moving upward.
  • the kitchen hood apparatus may be attached to extendable or fixed pipe being used as condensing duct to cool the hot air evacuated from the top cooking area.
  • the hood apparatus may be attached to extendable pipe, telescopic pipe, or wire, or to a combination thereof, whereas being protected by a shield to prevent accidental touch of moving parts, or hot parts, while providing the desired esthetics.
  • the kitchen hood apparatus may include travel limits, adjustable mechanically by mechanical limits, optionally with overcurrent detection to prevent the units from moving out of the predetermined limits even if the electrical control fails.
  • the limits may be defined by two mechanical stoppers equipped with sensors to detect magnet or other means whenever the hood reaches it's travel limit.

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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)

Abstract

L'invention concerne un dispositif de hotte de cuisine mobile situé au-dessus de la zone de cuisson qui évacue efficacement et en toute sécurité les fumées avec tous ses composants gazeux et liquides. Le dispositif peut être facilement démonté et nettoyé, tandis que certaines parties peuvent être jetables.
PCT/IL2017/051333 2017-01-09 2017-12-10 Hotte de cuisine améliorée Ceased WO2018127902A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL250014A IL250014A0 (en) 2017-01-09 2017-01-09 Improved kitchen hood
IL250014 2017-01-09

Publications (1)

Publication Number Publication Date
WO2018127902A1 true WO2018127902A1 (fr) 2018-07-12

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PCT/IL2017/051333 Ceased WO2018127902A1 (fr) 2017-01-09 2017-12-10 Hotte de cuisine améliorée

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IL (1) IL250014A0 (fr)
WO (1) WO2018127902A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
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IT201900009315A1 (it) * 2019-06-18 2020-12-18 Andrea Cingoli Cappa orientabile
EP4092334A3 (fr) * 2021-05-21 2023-02-22 Berbel Ablufttechnik GmbH Hotte, en particulier hotte aspirante

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Publication number Priority date Publication date Assignee Title
CN110030599A (zh) * 2019-04-23 2019-07-19 葫芦岛智多多科技有限责任公司 一种便于清理式油烟机
IT201900009315A1 (it) * 2019-06-18 2020-12-18 Andrea Cingoli Cappa orientabile
CN110500693A (zh) * 2019-08-13 2019-11-26 深圳市奈士迪技术研发有限公司 一种用于厨房新风系统的具有清洁功能的排气装置
CN111288529A (zh) * 2020-04-09 2020-06-16 杭州九阳小家电有限公司 一种烟机的控制方法及烟机
EP4092334A3 (fr) * 2021-05-21 2023-02-22 Berbel Ablufttechnik GmbH Hotte, en particulier hotte aspirante

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