EP0305962A2 - Distributeur de chaleur de flammes-gaz pour des ustensiles de cuisine et/ou pour des plaques de cuisson - Google Patents

Distributeur de chaleur de flammes-gaz pour des ustensiles de cuisine et/ou pour des plaques de cuisson Download PDF

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Publication number
EP0305962A2
EP0305962A2 EP88114097A EP88114097A EP0305962A2 EP 0305962 A2 EP0305962 A2 EP 0305962A2 EP 88114097 A EP88114097 A EP 88114097A EP 88114097 A EP88114097 A EP 88114097A EP 0305962 A2 EP0305962 A2 EP 0305962A2
Authority
EP
European Patent Office
Prior art keywords
plate
cookware
slots
hotplate
openings
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Withdrawn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
EP88114097A
Other languages
German (de)
English (en)
Other versions
EP0305962A3 (fr
Inventor
Lothar Hoffmann
Josef Kochauf
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
Priority claimed from DE19873729096 external-priority patent/DE3729096A1/de
Priority claimed from DE19873729095 external-priority patent/DE3729095A1/de
Application filed by Individual filed Critical Individual
Publication of EP0305962A2 publication Critical patent/EP0305962A2/fr
Publication of EP0305962A3 publication Critical patent/EP0305962A3/fr
Withdrawn legal-status Critical Current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
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/107—Pan supports or grates therefor

Definitions

  • the invention relates to a gas flame heat distributor for cookware, for example a pot, a pan, a saucepan or the like and / or a hotplate for gas burners.
  • the food to be cooked is heated unevenly and the gases are used insufficiently.
  • the heat supply in gas burners can only be changed by regulating the gas supply and thereby making the diameter of the flame ring larger or smaller. For example, if the heat input is low when cooking, the diameter of the flame ring is reduced by throttling the gas supply, which means that the center of the bottom of the cookware is strongly heated, but the edge areas of the base are only insufficiently heated, since this is also due to the low material thickness of the floor there is poor heat conduction in the floor itself.
  • the heat is evenly distributed to the bottom of the cooker crockery transfer because the hotplate has a heat storage effect, but the hotplate obstructs the air supply to the gas flame, which causes insufficient combustion of the gas. This reduces the efficiency and there is an outflow of unburned or only partially burned toxic gas, which can cause health damage.
  • the base for the bottom of the cookware usually consists of several webs running radially in the direction of the centrally arranged gas burner.
  • the flat bottom of the known cookware can be easily moved on these webs, so that the gas burner is often no longer in the center of the cookware.
  • Such an undesirable displacement of the cookware takes place especially when the food in the cookware is stirred, the cookware frequently being rotated and occasionally even tipping over, provided it is not held by a handle.
  • holding the cookware in this way is not possible, for example, if ingredients have to be stirred into the items in the cookware, since in this case one hand is required to fill in the ingredients and the other hand to stir.
  • the present invention has set itself the task of avoiding the disadvantages mentioned and to provide a gas flame heat distributor for cookware and / or hotplate, which ensures optimal use of the fuel gas and which can also be securely fixed and anchored to the hotplate.
  • the invention essentially consists in that the bottom of the dishes or the hotplate is provided in the region of the circumference with a toothed ring projecting downwards, the tooth gaps of which form openings.
  • the toothed rim protruding downwards prevents the flames from rising up over the bottom edge of the cookware, the openings ensuring a defined air supply and removal of the exhaust gases.
  • a combustion chamber is formed, inside which the gas burner is located, similar to the combustion chamber of a furnace, whereby the heat in the combustion chamber creates an air suction, which causes a sufficient supply of combustion air, so that a much better combustion of the Gases takes place as with a known cookware or a hotplate with a completely flat bottom.
  • the arrangement of the ring gear also causes an increase in the heat storage capacity of the cookware or the hotplate, especially in the edge area, that is, where, in the case of known cookware, insufficient heating takes place with a small flame, so that the inventive design of the cookware or hotplate also with a small flame, the food to be cooked is evenly heated along the entire bottom surface.
  • This uniform heating is also achieved in that a heat build-up occurs within the ring gear, the heat content of which is evenly transferred to the bottom of the cookware.
  • individual, preferably regular, cookware have the circumference of the ring gear arranged openings have a larger cross-section than the other openings, with adjacent to a side wall of these openings having a larger cross-section are provided, directed towards the center of the bottom, which also protrude from the bottom and the radial continuation of Cover openings at least partially.
  • the majority of the combustion air is supplied through these openings and the burned gases are also removed via these openings.
  • the ribs directed inwards from the ring gear toward the center of the base prevent them from at least partially covering the radial continuation of the openings and at least partially shielding the flame ring from the openings, so that flames undesirably come out of the openings.
  • these ribs divide the space delimited by the ring gear into several combustion chambers, each of which is supplied with oxygen via the associated opening with a larger cross section, as a result of which the portion of the gas in the burner area which has not yet burned and flows radially in the direction of the ring gear in outer area adjacent to the inside of the ring gear is burned, ie there is a complete combustion of the gas and no unburned gas flows out.
  • suction effect which causes an increased supply of combustion air via the openings having a larger cross section
  • these openings having a larger cross section expand towards the inside of the ring gear, preferably the plane formed by an inclined side wall of the opening encloses an acute angle with a radial plane passing through the opening.
  • the ribs are expediently curved in the shape of an arc, the convex side of the arc being directed against the radial extension of the associated opening.
  • the openings having a larger cross section are covered in the manner described, so that the flames of the gas burner cannot blow out of the openings;
  • the arched design of the ribs also ensures that the combustion air is supplied to the gas burner without swirls.
  • the ribs end at a distance from one another in the central region of the bottom. It is also advantageous if the height of the ribs decreases from the ring gear towards the center of the pot. This ensures that in the area of the gas burner there is first a central combustion in a non-subdivided space, but that in the radially outer area there is a subdivision into several combustion chambers corresponding to the number of fins, which ensure better post-combustion.
  • the ring gear and the ribs can be produced separately, for example by deep-drawing sheet metal, and, in the case of enamelled cookware, can be attached to the bottom of the cookware before enamelling, the attachment being carried out in the same way as that of the handles of the cookware.
  • the plate with the ring gear and the ribs in the casting process in particular from Cast aluminum.
  • Such an embodiment is more expensive, but has the advantage that the heat storage capacity of the floor is further increased by the plate.
  • the top of the top of the plate has a central recess with a preferably circular opening extending from the bottom to the top, from which recess radial grooves extend to the edge of the plate, and that the slots are arranged in recesses on the top of the plate, which are connected to the radial grooves.
  • the heat is transferred from the hotplate to the base of the pot both by contact and by convection, which results in an optimal transfer of the heat.
  • touching the heat transfer takes place at those points on the top of the hotplate at which the bottom of the pot rests, ie where the top has no depressions, grooves or recesses.
  • the heat transfer by convection takes place in that the heated air rises above the central opening and over the slots, whereby the central opening and the slots are arranged in a recess or in recesses in the top of the hotplate and the recess and the recesses are interconnected, this hot air and also the burned hot gases flow along the bottom of the pot until the hot air and the burned hot gases emerge at the edge of the hotplate via the radial grooves.
  • Due to the preferably circular arranged in the center in a central recess A large part of the hot air and the hot gases reach the area of the top of the hotplate, since this opening, which is arranged in the depression connected to the edge of the plate via the radial grooves, acts like a chimney, which creates a suction effect.
  • This suction effect causes fresh air to be drawn in along the underside of the hotplate via the incisions provided in the flange, so that the combustion gas is completely combusted.
  • the ribs provided on the underside of the hotplate and running to the center area performing a guiding function for the fresh air and preventing turbulence.
  • the exhaust gases, ie the completely burnt gases, are removed via the radial grooves provided on the top of the hotplate, open at the edge of the plate and therefore opening into the open.
  • the cross section, in particular the width, of the radial grooves is larger in the region adjacent to the central recess than in the peripheral region. This ensures that the hot gases flowing through the opening located in the central recess do not accumulate in the central area of the hotplate, but are discharged to the outside, so that uniform heating is ensured along the entire surface of the plate.
  • the recesses in which the slots are arranged are expediently formed by concentric grooves which intersect the radial grooves.
  • the slots here are curved in the shape of an arc, following the course of the concentric grooves. This ensures that all of the slots are connected to one another and to the opening in the central depression via the concentric grooves and the radial grooves, so that uniform heating of the pot base by convection through the hot exhaust gases is ensured.
  • concentric grooves without slots can also be provided, which are likewise connected to one another and to the concentric grooves having the slots via the radial grooves.
  • the distance between the outermost concentric groove from the edge of the plate is advantageously greater than the distance between adjacent concentric grooves, so that there is a wide area on which the bottom of the pot rests. This wide surface creates a seal between the bottom of the pot and the hotplate in the peripheral area of the cooking plate, thereby preventing the hot exhaust gases from escaping rapidly in the peripheral area, and these hot exhaust gases can only escape via the radial grooves.
  • the slots located in different concentric grooves are arranged offset from one another in the radial direction, so that a uniform distribution of these slots over which the hot gases flow upwards is ensured along the top of the hotplate.
  • the slots can have beveled side surfaces, the further opening of the slots being provided on the underside of the plate. With such a design, the side surfaces of the slots are heated more by the hot gases, which also results in better heating of the hotplate, and the suction effect caused by the slots is increased.
  • top of the plate is slightly sloping from the edge of the plate to the center of the plate, which ensures that the pot sits on the edge of the plate even if the bottom of the pot is convex.
  • An upwardly bent edge strip or edge bead provided on the edge of the plate can serve to fix the cookware.
  • the bottom 20 of the cookware has a ring gear 31 on its circumference.
  • the toothed ring has teeth 23 and openings 24 formed by the tooth gaps with a smaller cross section and four openings 25 which have a cross section enlarged compared to the cross section of the openings 24.
  • One of the two side walls 26 of these openings 25 runs radially to the center 27 of the base 20, the other side wall 28 runs obliquely, so that the plane formed by this side wall 28 includes an acute angle ⁇ with a radial plane 29.
  • the cross section of the openings 25 widens towards the interior of the space delimited by the ring gear 31.
  • a rib 30 adjoins the side wall 26 of each opening 25, which is curved in an arcuate manner, the convex side 21 of the rib 30 being directed against the radial plane 29 and the rib 30 intersecting this radial plane 29.
  • the opening 25 is covered against the gas burner, the position of which is indicated by a broken line at 22. It is thus prevented that even with large gas flames they can knock out of the openings 25.
  • the ribs 30 end at a distance from the center point 27 and the height of the ribs 30 decreases, as can be seen from FIG. 3, in the direction of the center point 27.
  • the ring gear 31 and the ribs 30 can be formed in one piece with a plate which is connected to the base 20 of the cookware. But it is also possible to attach the ring gear 31 and the ribs 30 directly to the bottom 20 of the cookware.
  • the number of ribs 30 is basically arbitrary. They can be designed so that their height in the region of the ring gear 31 corresponds to the height of the teeth 23 of the ring gear 31 (solid line in FIG. 3). But you can too have a height which is less than the height of the teeth 23 of the ring gear 31 (dotted line in FIG. 3).
  • the chambers formed by the ribs 30 are separated from one another in the edge region, in the second case they can communicate with one another.
  • the teeth 23 can have flat (see FIG. 2 to the left of the rib 30), pointed (not shown) and / or rounded (see FIG. 3 to the right of the rib 30) tooth tips in the circumferential direction.
  • Flat and / or rounded tooth tips are preferable, since then the risk of injuries when handling, for example when washing dishes and damage, for example on shelves, is avoided.
  • the depth and shape of the tooth space openings 24 can vary within a wide range. The shallower the depth, the greater the heat storage space that can be achieved by the ring gear and thus the effectiveness of the heat utilization.
  • the hotplate 1 shown in FIGS. 4-6 consists of a material with good thermal conductivity, preferably cast iron.
  • the underside 2 of the hotplate shown in FIG. 5 has a flange 4 which projects downwards in the region of the plate edge 3 and is interrupted by incisions 5. From this flange 4, curved ribs 6 extend to a circular opening 8 in the central region of the hotplate 1, which opening extends through to the top 8 of the hotplate.
  • the incisions 5 serve on the one hand to fix the hotplate 1 on the webs surrounding the gas burner, which snap into individual of these incisions 5, and on the other hand to ensure the supply of combustion air to the gas burner.
  • the ribs 6 act as guide elements for the fresh air supply and divide the combustion chamber into several sectors, which promotes the combustion of the combustion gases.
  • the circular opening 7 is arranged in a recess 9 in the middle of the top 8 of the hotplate 1. From this recess radial grooves 10 extend outwards, the width of which in the region 9 adjacent to the recess 9 'is larger than in the adjoining region. Grooves 11, 12 are provided concentrically with the opening 7 or recess 9. In the concentric grooves 12 there are arcuate slits 13 extending from the bottom 2 to the top 8, whereas the concentric grooves 11 are formed without such slits. Between the slots 13, short circular-arc-shaped webs 14 are provided in the grooves 12.
  • the slots 13 are thus, like the circular opening 7, in recesses in the top 8 of the plate, so that a space remains between the bottom of the pot placed on the hotplate 1 and the slots, through which the hot gases rising through the slots can spread.
  • the slots 13 of adjacent concentric grooves 12 are arranged offset in the radial direction and connected to one another and to the circular opening 7 via the radial grooves 10 and the concentric grooves 11, 12. This ensures that the hot exhaust gases can spread evenly over the entire top 8 of the hotplate 1 and that the bottom of the pot is evenly heated by convection by means of the hot exhaust gases where the bottom of the pot does not rest directly on the top 8 of the hotplate 1. Where the bottom of the pot rests on the top 8, heat is transferred by touching the hot plate 1 to the bottom of the pot.
  • the distance a between the outermost concentric groove 11 and the plate edge 3 is greater than the distance b between adjacent concentric grooves, as a result of which a wide sealing ring is formed in the peripheral area which, when the pan is placed on the hotplate 1 prevents the hot gases from escaping undesirably, so that they can only escape via the radial grooves 10.
  • the slots 13 have beveled side surfaces 15, the further opening of the slots being provided on the underside 2 of the plate. 6 that the top side 8 of the plate is sloping from the edge 3 of the plate towards the center of the plate.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cookers (AREA)
  • Gas Burners (AREA)
EP88114097A 1987-09-01 1988-08-30 Distributeur de chaleur de flammes-gaz pour des ustensiles de cuisine et/ou pour des plaques de cuisson Withdrawn EP0305962A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3729096 1987-09-01
DE3729095 1987-09-01
DE19873729096 DE3729096A1 (de) 1987-09-01 1987-09-01 Kochplatte fuer gasherde
DE19873729095 DE3729095A1 (de) 1987-09-01 1987-09-01 Kochgeschirr

Publications (2)

Publication Number Publication Date
EP0305962A2 true EP0305962A2 (fr) 1989-03-08
EP0305962A3 EP0305962A3 (fr) 1989-08-02

Family

ID=25859237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114097A Withdrawn EP0305962A3 (fr) 1987-09-01 1988-08-30 Distributeur de chaleur de flammes-gaz pour des ustensiles de cuisine et/ou pour des plaques de cuisson

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EP (1) EP0305962A3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108262575A (zh) * 2017-01-04 2018-07-10 珠海格力电器股份有限公司 一种导热板及电水壶
CN109959034A (zh) * 2017-12-14 2019-07-02 博西华电器（江苏）有限公司 一种灶具的锅架及灶具

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1158135A (en) * 1914-05-11 1915-10-26 Golladay Lake Hygienic hot-plate.
CH82571A (de) * 1919-03-14 1919-10-01 Gottlieb Maag Rost für Gasheizbrenner
US1732554A (en) * 1929-10-22 Cooking xttelfsil
US1836156A (en) * 1931-05-21 1931-12-15 Forest V Detwiler Cooking plate stove top
DE814212C (de) * 1949-07-28 1951-09-20 Kuehn & Co Heizplatte fuer Gasherde
AT203674B (de) * 1957-04-01 1959-05-25 Erich Heyer Mit Durchbruch und Deckel versehene Platte für Gasherde
DE1117283B (de) * 1955-05-16 1961-11-16 Schirnecker Hans Ludwig Scheibenfoermiger Aufsatz auf Gas-Kochbrenner
AT304010B (de) * 1971-03-16 1972-12-27 Kochauf Josef Kochplatte für Gasherde

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1732554A (en) * 1929-10-22 Cooking xttelfsil
US1158135A (en) * 1914-05-11 1915-10-26 Golladay Lake Hygienic hot-plate.
CH82571A (de) * 1919-03-14 1919-10-01 Gottlieb Maag Rost für Gasheizbrenner
US1836156A (en) * 1931-05-21 1931-12-15 Forest V Detwiler Cooking plate stove top
DE814212C (de) * 1949-07-28 1951-09-20 Kuehn & Co Heizplatte fuer Gasherde
DE1117283B (de) * 1955-05-16 1961-11-16 Schirnecker Hans Ludwig Scheibenfoermiger Aufsatz auf Gas-Kochbrenner
AT203674B (de) * 1957-04-01 1959-05-25 Erich Heyer Mit Durchbruch und Deckel versehene Platte für Gasherde
AT304010B (de) * 1971-03-16 1972-12-27 Kochauf Josef Kochplatte für Gasherde

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108262575A (zh) * 2017-01-04 2018-07-10 珠海格力电器股份有限公司 一种导热板及电水壶
CN109959034A (zh) * 2017-12-14 2019-07-02 博西华电器（江苏）有限公司 一种灶具的锅架及灶具

Also Published As

Publication number Publication date
EP0305962A3 (fr) 1989-08-02

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