EP3488151A1 - Plaque de cuisson - Google Patents

Plaque de cuisson

Info

Publication number
EP3488151A1
EP3488151A1 EP17730949.9A EP17730949A EP3488151A1 EP 3488151 A1 EP3488151 A1 EP 3488151A1 EP 17730949 A EP17730949 A EP 17730949A EP 3488151 A1 EP3488151 A1 EP 3488151A1
Authority
EP
European Patent Office
Prior art keywords
cooktop
support element
motor
projecting portion
connection area
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Withdrawn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
EP17730949.9A
Other languages
German (de)
English (en)
Inventor
Jacopo PIRISINU
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.)
Elica SpA
Original Assignee
Elica SpA
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 Elica SpA filed Critical Elica SpA
Publication of EP3488151A1 publication Critical patent/EP3488151A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F24C15/2042—Devices for removing cooking fumes structurally associated with a cooking range e.g. downdraft

Definitions

  • the present invention relates to a cooktop in accordance with the preamble of claim 1.
  • the present invention relates to a cooktop integrating a hood that is commercially available under the name of "downdraft hood”.
  • hoods have been developed that can both extract air and exhaust the extracted air out of the house, using an intake section, and filter such air and recirculate it into the domestic environment.
  • Downdraft hoods are among the variety of commercially available hoods, and are often integrated either in a cooktop or in a kitchen furniture countertop. Namely, a downdraft hood is configured to generate a crossflow that is higher than the ascending flow rate of cooking steam, so that such steam is extracted toward the cooktop in a vertical downward direction.
  • a cooktop comprising a support element.
  • Such support element has a top surface and a bottom surface.
  • Cooking areas are defined on the top surface, and have the purpose of accommodating a heating element.
  • the support element has a suction opening for drawing cooking fumes.
  • the cooktop further comprises a suction duct, in fluid communication with the suction opening.
  • a centrifugal fan is in fluid communication with the suction opening, and particularly has an inlet port in fluid communication with the suction duct. The fan ejects the fumes through a outlet scroll.
  • a motor is associated with the centrifugal fan to set it into rotation.
  • the support element has a connection area for the motor on its bottom surface.
  • the technical purpose of the present invention is to provide a cooktop that can obviate the above mentioned prior art drawbacks.
  • the present invention has the object of providing a cooktop that can minimize vibration and the resulting acoustic noise.
  • a cooktop in accordance with the present invention comprises a support element that has a top surface and a bottom surface. At least one cooking area is configured to accommodate a heating element at the top surface.
  • the support element further has a suction opening for drawing cooking fumes.
  • the cooktop also comprises a suction duct, in fluid communication with the suction opening.
  • a centrifugal fan has an inlet port and a outlet scroll. The inlet port of the centrifugal fan is in fluid communication with the suction duct.
  • a motor is associated with the centrifugal fan to set it into rotation.
  • the support element further has a connection area on its bottom surface.
  • the motor is designed to be connected to the support element at the connection area.
  • connection area has at least one projecting portion, which directly contacts the motor. Such motor is fixed to the support element at the projecting portion.
  • the cooktop comprises connection means operable between the projecting portion of the connection area and the motor to fix the motor to the support element.
  • the projecting portion has at least one hole.
  • the connection means comprise at least one screw, which is configured to fix the motor to the support element through such hole.
  • connection area comprises a plurality of projecting portions.
  • Each projecting portion has at least one hole formed therein for a respective screw.
  • connection area has a single projecting portion which has in turn a plurality of holes, preferably three. Each hole is configured to receive a respective fastening screw for fixing the motor.
  • the cooktop of the invention obviates the technical need of stiffening the connection area at the motor fastening points, thereby affording more stable fixation and increasing the frequency of system defined by the support element, the motor and the fan. All these effects contribute to a considerable reduction of noise.
  • the support element has at least one lightening area located proximate to the connection area.
  • the support element has a pair of lightening areas located outside the projecting portion.
  • the lightening areas impart higher flexibility to the structure of the support element, and help to confine any vibration in the lightening area. Furthermore, the lightening areas also afford a limited oscillation range in the connection area without allowing such range to have effects on other parts of the support element, which will provide further minimization of both vibration and noise generated thereby.
  • FIG. 1 is a perspective top view of a cooktop of the present invention
  • FIG. 2 is a perspective exploded bottom view of the cooktop of Figure 1, according to a first embodiment
  • FIG. 2a is a perspective view of a detail of the cooktop of Figures 1 and 2;
  • FIG. 3 is a perspective bottom view of a detail of the cooktop of Figure 2;
  • Figure 4 is a perspective bottom view of the detail of Figure 3 according to a second embodiment.
  • numeral 1 generally designates a cooktop of the present invention.
  • the cooktop 1 comprises a support element 2.
  • the support element 2 has a top surface 2a and a bottom surface 2b. Namely, when the cooktop 1 is installed, the top surface 2a of the support element 2 is designed to be the exposed or visible side and the bottom surface 2b is designed to be the side that is hidden to the view of users, e.g. embedded in kitchen furniture.
  • the top surface 2a is embodied as a glass sheet or a sheet made of any material having glass-like properties (not shown).
  • both the top surface 2a and the bottom surface 2b are embodied as parallel and opposed flat surfaces.
  • the support element 2 has at least one cooking area 3 which is configured to accommodate a heating element (not shown) at the top surface 2a.
  • a plurality of cooking areas 3 may be defined on the top surface 2a.
  • the cooking areas 3 are suitably distributed over the top surface 2a of the support element 2 and are particularly designed to radiate heat, if the heating elements are of resistive type, o induce heat generation in appropriate cooking containers, if the heating elements are of inductive type.
  • the support element 2 further has a cavity 4, which substantially extends between the top surface 2a and the bottom surface 2b.
  • the cavity 4 is located in a central area relative to the positions of the cooking areas 3.
  • the cavity 4 extends from the top surface 2a and almost reaches the bottom surface 2b without touching it, i.e. leaves a space that may be designed for collection of water, steam and/or fluids.
  • the support element 2 further has a suction opening 5, particularly situated at the cavity 4, for drawing cooking fumes.
  • the suction opening 5 has a circular shape and is protected by a grille 6.
  • the grille 6 is preferably removable for maintenance purposes.
  • the grille 6 has a safety purpose, as it prevents the introduction of foreign elements into the suction opening 5.
  • the support element defines a volume that is adapted to contain the parts required for controlling and heating/cooking food, as well as for downward extraction of cooking vapors.
  • the cooktop 1 also comprises a suction duct 7, in fluid communication with the suction opening 5.
  • the cooktop 1 further comprises a centrifugal fan 8 having an inlet port 8a and an outlet scroll 8b.
  • the inlet port 8a is in fluid communication with the suction duct 7.
  • the centrifugal fan 8 has two inlet ports 8a and 8a' at the axis of rotation, located on each side of the fan 8.
  • the cooktop 1 comprises a housing 10 for the centrifugal fan 8.
  • the housing 10 defines both the suction duct 7 and the outlet scroll 8b of the centrifugal fan 8.
  • the housing 10 is in turn defined by first 10a and second 10b half-parts and a partition element lOd. It is further closed by a cover element 10c. As clearly shown in Figure 2, in operation the centrifugal fan 8a is situated between the two half-parts 10a, 10b.
  • the first half-part 10a has a perimeter wall 11 which at least partially defines the suction duct 7 and the outlet scroll 8b.
  • a partition wall 12 separates the suction duct 7 from the outlet scroll 8b of the centrifugal fan 8.
  • a diaphragm 13 is transverse to the walls 11, 12 and at least partially defines the outlet scroll 8b of the centrifugal fan 8, and has one of the two aforementioned inlet ports 8a which, once the cooktop 1 is assembled, channels air into the centrifugal fan 8.
  • the first half-part 10a is directly fixed to the support element 2.
  • the second half-part 10b is configured to close the first half-part 10a, and is particularly fixed to the first half-part 10a. More in detail, the second half-part has its own perimeter wall 14 and a partition wall 15, which correspond to the same walls 11, 12 of the first half-part 10a and are configured to mate against them.
  • the second half-part 10b further comprises an additional diaphragm 16, transverse to the walls 14, 15, which defines the other inlet port 8a of the centrifugal fan 8.
  • the partition element 10b overlies the two half-parts 10a, 10b, at the partition walls 12, 15. In operation, the partition element divides the stream of fumes into two branches 7a of the suction duct 7. Each branch 7a ends in one of the respective inlet ports 8a of the fan 8.
  • the partition element 10b has an outer surface 25 that faces a section 7b of the suction duct 7, and an inner surface 26 that faces the branches 7a of the suction duct 7.
  • the cooking vapors are divided between the two branches 7a of the suction duct 7 and, due to the profile of the inner surface 26, the two portions of the vapors are conveyed by laminar flow toward the two inlet ports 8a of the centrifugal fan 8.
  • the curved shape of the partition wall 1 Od makes such portions more laminar as it facilitates and promotes their movement toward the housing of the fan 8.
  • the curved shape of the partition element lOd has the shape of an arc of a parabola.
  • the first stream portion that flows in the respective branch 7b of the suction duct 7 to reach the port 8a of the centrifugal fan 8 shall flow through a first intake grille 27, and the second stream portion shall flow through a second intake grill 28 to access the port 8a' of the centrifugal fan 8.
  • the grilles 27, 28 are the grilles required by regulations to protect user safety, by preventing users from directly reaching the centrifugal fan 8 and the electrically powered parts.
  • cover element 10c has the shape of a half-shell and, once the cooktop 1 is assembled, it encloses the two half-parts 10a, 1 Ob and the partition element, in combination with the support element 2.
  • the cooktop 1 comprises a motor 9 associated with the centrifugal fan 8 to set it into rotation.
  • the motor 9 is mechanically coupled to the centrifugal fan 8, e.g. by a direct mechanical coupling between the rotor of the motor 9 and the hub of the centrifugal fan 8.
  • the diameter of the centrifugal fan 8 is 185 mm and its rotation, imposed by the motor 9 may be as high as 2700-3000 revolutions/min.
  • Alternative embodiments, not shown, can be provided, in which the dimensions of the centrifugal fan 8 and the rpm of the motor 9 may be changed to meet any new design specifications.
  • the support element 2 further has a connection area 17 on the bottom surface 2b for fixing the motor 9 to the support element 1.
  • the motor is designed to be connected to the support element at such connection area 17.
  • connection area 17 has at least one projecting portion 18 that directly contacts the motor 9.
  • the projecting portion 18 is particularly defined by a protrusion of the bottom surface 2b which projects outwards, i.e. toward the motor 9.
  • the portion 18 projects out of the bottom surface 2b and faces the motor 9.
  • the motor 9 is fixed to the support element 2 at the projecting portion 18.
  • the cooktop 1 comprises connection means 23 operable between the projecting portion 18 of the connection area 17 and the motor 9 to fix the motor 9 to the support element 2.
  • connection means comprise at least one screw 24, which is configured to fix the motor 9 to the support element 2 through the hole 19.
  • connection means 23 comprise as many screws 24 as there are holes 19 in the connection area 17.
  • the screw 24 may be replaced by any analogous fastening element known to the skilled person, such as, by way of example, rivets, welds, glue or else.
  • connection area 17 comprises a plurality of projecting portions 18.
  • Each projecting portion 18 has a single hole 19 formed therein for receiving a respective screw.
  • Such projecting portions 18 have a preferably circular plan shape and are arranged along a circumference.
  • the projecting portions 18 of Figure 3 are preferably three in number, and are angularly equally spaced. In alternative embodiments, not shown, there may be four angularly equally spaced projecting portions, or two opposed projecting portions.
  • any number of projecting portions 18 may be provided. Their arrangement may change depending on the design specifications.
  • connection area 17 may have a single projecting portion 18 which has in turn a plurality of holes.
  • the projecting portion 18 has a circular ring plan shape.
  • the support element 2 has at least one lightening area 20 located proximate to the connection area 17. Particularly, the lightening areas 20 substantially delimit the connection area 17.
  • the support element 2 has a pair of lightening areas 20 located outside the projecting portions 18. These lightening areas 20 are particularly defined each by a respective cutout 21.
  • the cutout 21 has the shape of a circular arc.
  • the cutouts 21 are separated by two bridges 22 which connect the connection area 17 to the rest of the support element 2.
  • the cutouts 21 are arranged in substantially concentric positions relative to the single projecting portion 18

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Saccharide Compounds (AREA)
  • Surgical Instruments (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

L'invention concerne une plaque de cuisson (1) comprenant un élément de support (2) comportant au moins une zone de cuisson (3) destinée à recevoir un élément chauffant, et une ouverture d'aspiration (5) destinée à aspirer les fumées de cuisson. La plaque de cuisson (1) comprend en outre un conduit d'aspiration (7) en communication fluidique avec l'ouverture (5) ; un ventilateur centrifuge (8) comportant un orifice d'entrée (8a) et une volute de sortie (8b), l'orifice d'entrée (8a) étant en communication fluidique avec le conduit d'aspiration (7) ; un moteur (9) associé au ventilateur (8) afin de le mettre en rotation ; l'élément de support (2) comportant une zone de liaison (17) sur sa face inférieure (2b), et le moteur (9) étant conçu pour être relié à l'élément de support (2) au niveau de la zone de liaison (17) ; la zone de liaison (17) comportant au moins une partie en saillie (18) se mettant en contact avec le moteur (9), le moteur (9) étant fixé à l'élément de support (2) au niveau de la partie en saillie (18).
EP17730949.9A 2016-07-19 2017-06-14 Plaque de cuisson Withdrawn EP3488151A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102016000075476A IT201600075476A1 (it) 2016-07-19 2016-07-19 Piano cottura.
PCT/IB2017/053538 WO2018015823A1 (fr) 2016-07-19 2017-06-14 Plaque de cuisson

Publications (1)

Publication Number Publication Date
EP3488151A1 true EP3488151A1 (fr) 2019-05-29

Family

ID=57708667

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17730949.9A Withdrawn EP3488151A1 (fr) 2016-07-19 2017-06-14 Plaque de cuisson

Country Status (4)

Country Link
EP (1) EP3488151A1 (fr)
DE (1) DE202017007464U1 (fr)
IT (1) IT201600075476A1 (fr)
WO (1) WO2018015823A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019213610B3 (de) * 2019-09-06 2020-12-17 Wilhelm Bruckbauer Einströmdüse

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4326006A1 (de) * 1993-08-03 1995-02-09 Mulfingen Elektrobau Ebm Befestigungsvorrichtung für mit Lüfterrädern versehene Elektromotoren in Dunstabzugshauben

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3587555A (en) * 1969-05-13 1971-06-28 Jenn Air Corp Ventilated range
DE202013005303U1 (de) * 2013-06-12 2013-06-24 Wilhelm Bruckbauer Kochfeld

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4326006A1 (de) * 1993-08-03 1995-02-09 Mulfingen Elektrobau Ebm Befestigungsvorrichtung für mit Lüfterrädern versehene Elektromotoren in Dunstabzugshauben

Also Published As

Publication number Publication date
WO2018015823A1 (fr) 2018-01-25
IT201600075476A1 (it) 2018-01-19
DE202017007464U1 (de) 2021-09-15

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