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
  • F24C15/10—Tops, e.g. hot plates; Rings
  • F24C15/102—Tops, e.g. hot plates; Rings electrically heated
  • F24C15/105—Constructive details concerning the regulation of the temperature
• • 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
  • F24C7/00—Stoves or ranges heated by electric energy
  • F24C7/06—Arrangement or mounting of electric heating elements
  • F24C7/067—Arrangement or mounting of electric heating elements on ranges
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B3/00—Ohmic-resistance heating
  • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
  • H05B3/72—Plates of sheet metal

Definitions

• the invention relates to a hob-type heating system intended, in particular, for cooking appliances.
• These cooking plates operate thanks to armored heating resistors. These are mounted just below the hob. These resistors have the drawback of having a long temperature rise time because of the envelope present around the resistive film, as well as of a small contact surface allowing heat exchanges with the cooking plate and of a high thermal inertia.
• These heating resistors are composed of a resistive heating film of nickel chrome alloy centered in a tube (copper, stainless steel, incoloy or inconel) filled with an insulating material (magnesium oxide) ensuring thermal transfer and insulation. electric.
• An object of the invention is to provide a heating system of the optimized hob type with low thermal inertia allowing a rapid rise in temperature while having optimum temperature distribution and regulation.
• a heating system comprising a cooking plate having a lower surface, heating means positioned under the cooking plate opposite the lower surface, characterized in that that the heating means comprise a thermal diffuser bearing on the lower surface of the hob and extending opposite it in a complementary manner, and a heating element bearing on a lower face of the thermal diffuser and s' extending opposite a part of the underside of the thermal diffuser.
• the heating system according to the invention has at least one of the following technical characteristics:
• the cooking plate is a thin plate having a small thickness
• the cooking plate is made of refractory material
• the thermal diffuser is made of a thermally conductive material, in particular aluminum or copper;
• the heating element comprises a flat resistive film
• the heating element comprises a support plate on which the flat resistive film extends
• the heating system further comprises means for holding in position the plate, the thermal diffuser, and the heating element;
• the heating means comprise a series of heating elements distributed on the underside of the thermal diffuser;
• the heating means also comprise a thermal sensor associated with the heating element.
• a cooking appliance intended for the direct cooking of food comprising a heating system having at least one of the preceding technical characteristics.
• FIG. 1 is a three-dimensional view of a heating system according to the invention.
• FIG. 1 is a bottom view of the heating system of Figure 1;
• FIG. 3 is a side view of the heating system of Figure 1;
• FIG. 4 is an exploded three-dimensional view of the heating system of Figures 1 to 3;
• FIG. 5 is a three-dimensional view of a heating element of the heating system according to the invention.
• the heating system 1 according to the invention comprises a stack formed by a cooking plate 10, a thermal diffuser 20, one or more heating elements 30.
• the thermal diffuser 20 and the heating element or elements 30 are part of the heating means of the heating system 1 according to the invention.
• the heating system 1 according to the invention comprises means for holding in position 12.50 of the stack thus formed.
• the cooking plate 10 is here a rectangular-shaped cooking plate.
• the cooking plate 10 comprises an upper cooking surface 13 intended to directly receive food to be cooked, such as meat, fish or vegetables.
• the cooking plate 10 has a lower surface 14.
• the cooking plate 10 is a thin plate having a small thickness.
• the hob 10 is made of a refractory material.
• the hob is made of refractory stainless steel.
• the cooking plate 10 Extending from the lower surface 14, the cooking plate 10 comprises a first series of studs 11 distributed over the lower surface 14.
• This first series of studs 11 allows the mounting of the heating system 1 according to the invention on a cooking appliance (not shown).
• the studs 11 are attached threaded rods welded to the lower surface 14 of the cooking plate 10.
• the studs 11 are made of stainless steel.
• the series of studs 11 comprises twenty studs 11. Other numbers and distributions of these studs are possible depending on the configuration of the heating system 1 according to the invention.
• the cooking plate 10 comprises a second series of studs 12 forming a part of the means for holding in position 12.50 the stack formed by the cooking plate 10, the thermal diffuser 20 and or heating elements 30, the second series of studs 12 projects from the lower surface 14 of the cooking plate 10.
• the studs of the second series of studs 12 are, for example, rods added threaded welded on the lower surface 14.
• the studs of the second series of studs 12 are made of copper for example.
• the series of studs 12 comprises forty-eight studs. Other numbers and distributions of these studs are possible depending on the configuration of the heating system 1 according to the invention, in particular according to the number of heating elements 30 installed.
• the second series of studs 12 receives, once said stack formed, clamping means 50, which are here nuts coming to be screwed on the studs. These nuts 50 can be made of brass for example.
• the thermal diffuser 20 is here a plate of rectangular shape.
• the thermal diffuser has an upper face 23 and a lower face 24. It further comprises, here, a peripheral rim 25 which projects from the lower face 24.
• the thermal diffuser 20 comprises a first series through holes 21 whose number and positioning correspond to the number and positions of studs 11 that the series of through holes 21 is intended to receive during an assembly of the heating system 1 according to the invention.
• the thermal diffuser 20 comprises a second series of through holes 22 whose number and positioning correspond to the number and positions of studs of the second series of studs 12 that the series of through holes 22 is intended to receive during 'An assembly of the heating system 1 according to the invention.
• the thermal diffuser 20 extends opposite the lower surface 14 of the cooking plate 10 and the upper face 23 comes to bear on the lower surface 14 of the cooking plate 10.
• the thermal diffuser 20 has a shape complementary to it so as to cover a maximum surface of the latter. This makes it possible to obtain an optimal heat exchange surface between the heating means and the cooking plates 10.
• the rim 25 protects the heating element or elements 30 which are positioned in abutment against the underside 24 of the thermal diffuser 20 and which we will now describe.
• the heating element 30 comprises a support plate 34 on which extends a flat resistive film 33.
• the planar shape of the flat resistive film 33 provides a large heat exchange surface .
• the flat resistive film 33 is in the shape of a "U”.
• the heating element 30 here comprises three flat resistive films 33 which are mounted in parallel with each other. It should be noted that the number and the shape of the flat resistive films 33 can be different depending on the configuration of the heating element 30 as well as the desired heating regulation.
• the support plate 34 further comprises a series of through holes 32, here eight in number. These through holes 32 are configured so as to receive, during assembly of the heating system 1 according to the invention, all or part of the studs of the second series of studs 12. Thus, once assembled, the heating element 30 extends opposite the lower surface 24 of the diffuser thermal 20 and bears on said lower surface 24 of the thermal diffuser 20.
• the heating system 1 comprises a series of six heating elements 30 distributed on the underside 24 of the thermal diffuser 20. Again, the number and position of the heating elements 30 are depending on the desired configuration of the heating system 1 according to the invention. The fact of having several heating elements 30 makes it possible to create simply and easily different cooking zones at the level of the upper cooking surface 13 of the cooking plate 10. The maximum number of these cooking zones is equal to the number of heating elements 30 installed. In fact, with such a structure, it is possible to power the heating elements present 30 differently and independently of each other.
• thermal sensors 40 are provided: there is a thermal sensor 40 associated with each of the heating elements 30.
• the thermal sensor 40 is for example a thermocouple which is brazed and insulated on one of the studs of the second series of studs 12 passing through the support plate 34 of the associated heating element 30.
• Such a heating system 1 is intended to be mounted on a cooking appliance which further comprises a control and supply unit for the heating elements 30 connected, on the one hand, to the terminals d supply 31 of the heating elements 30 and, on the other hand, on the thermal sensors 40.
• a heating system 1 makes it possible to obtain rapid temperature increases due to its low thermal inertia while having a regulation of the heating (and therefore cooking) temperature multi independent points or multi zones. Furthermore, such a heating system 1 according to the invention makes it possible, by virtue of its structure, to have temperature uniformity at the level of the upper cooking surface 13 of the cooking plate 10. Thus, the consumption of electrical energy is controlled due to the possibility of managing several cooking zones: for example to heat only part of the cooking plate without having to heat the whole of said plate. cooking. The efficiency of the system is thus improved. Of course, it is possible to make numerous modifications to the invention without going beyond the ambit of the latter.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Baking, Grill, Roasting (AREA)
• Control Of Resistance Heating (AREA)

Applications Claiming Priority (2)

Publications (3)

Family

ID=65685707

Family Applications (1)

Country Status (3)

Families Citing this family (1)

Family Cites Families (5)

• 2018
  • 2018-11-09 FR FR1860370A patent/FR3088413B1/fr active Active
• 2019
  • 2019-10-30 EP EP19829256.7A patent/EP3877700B1/de active Active
  • 2019-10-30 WO PCT/FR2019/052579 patent/WO2020094949A1/fr not_active Ceased

Also Published As

Similar Documents

Legal Events