EP1720436A1 - Dispositif de traitement de produits alimentaires - Google Patents

Dispositif de traitement de produits alimentaires

Info

Publication number
EP1720436A1
EP1720436A1 EP05706543A EP05706543A EP1720436A1 EP 1720436 A1 EP1720436 A1 EP 1720436A1 EP 05706543 A EP05706543 A EP 05706543A EP 05706543 A EP05706543 A EP 05706543A EP 1720436 A1 EP1720436 A1 EP 1720436A1
Authority
EP
European Patent Office
Prior art keywords
induction units
induction
frame
units
furnace
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Withdrawn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
EP05706543A
Other languages
German (de)
English (en)
Inventor
Ernst Wüst
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.)
Aerofoodtec
Original Assignee
Aerofoodtec
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 Aerofoodtec filed Critical Aerofoodtec
Publication of EP1720436A1 publication Critical patent/EP1720436A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J39/00—Heat-insulated warming chambers; Cupboards with heating arrangements for warming kitchen utensils
    • A47J39/006—Heat-insulated warming chambers; Cupboards with heating arrangements for warming kitchen utensils for either storing and preparing or for preparing food on serving trays, e.g. heating, thawing, preserving
    • 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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/129—Cooking devices induction ovens

Definitions

  • the present invention relates to a device for treating food.
  • Treatment can be understood as the so-called food regeneration, which means thawing and heating food to a desired temperature. Treatment can also be used, for example, to keep warm
  • Devices of this type are used in airplanes, on ships, in railroad cars, in buses, etc.
  • Known devices of this type include a housing in which at least one heating element, a water source and a fan are located.
  • the food to be regenerated is located in containers which are usually made of aluminum and which have a bowl-shaped lower part and a lid, the lid being normally firmly connected to the lower part.
  • the food is delivered chilled or frozen for regeneration. Openings are made in the lid.
  • the object of the present device is to eliminate the mentioned and other disadvantages of the prior art.
  • FIG. 1 shows a front view of the lower section of a first embodiment of the present device, which has a number of inductors
  • FIG. 2 shows a section A-A through the device according to FIG. 1
  • FIG. 3 shows a connection of the inductors of the device according to FIG. 1
  • FIG. 4 in a vertical section and enlarges a section from a second embodiment of the present device
  • FIG. 5 a perspective view of a further embodiment of the present device
  • FIG. 6 a side view of a still further embodiment of the present device
  • FIG. 7 shows a front view of the lower section of a still further embodiment of the present device with a number of inductors
  • FIG. 8 shows a side view of a further embodiment of the present device which can serve as a tunnel oven
  • FIG. 9 shows a horizontal section AA the device according to FIG. 8,
  • FIG. 10 in a vertical section through a further embodiment of the present device, FIG. 11 enlarges a detail from FIG. 10, 12 shows a first embodiment of the feed part for the present device, FIG. 13 shows a second embodiment of the feed part for the present device and
  • Fig. 14 in a plan view of a so-called warming issue.
  • the present device for preparing food comprises an oven 1.
  • this oven 1 also includes, among other things, a frame 2 and a rear wall 6 on the rear of the frame 2.
  • the frame 2 is composed of two side walls 3 and 4, a floor 5 and a ceiling (not shown).
  • the components of the furnace 1 mentioned are advantageously rigidly connected to one another. It is expedient if the front side 7 of the frame 2 can be locked by means of a door (not shown) which is known per se and which is assigned to the front side 7 of the frame 2 in a manner which is also known per se.
  • the dishes to be prepared are located in containers 20.
  • the present device also comprises flat induction units 10 which are assigned to the inside 59 of the side walls 3 and 4 of the furnishing frame 2 and which run practically horizontally. These plate-shaped induction units 10 are arranged one above the other. The size of the distance between two induction units 10 lying one above the other is selected such that a container 20 for accommodating the food to be prepared can find space or barely space between two surface induction units 10 lying one above the other.
  • the respective induction unit 10 comprises two inductors 41 and 42 lying in the same plane and close to one another. These inductors 41 and 42 are essentially of the same design and they are identical with one of their shorter sides bluntly assigned to each other.
  • the respective inductor 41 or 42 has a plate-shaped base body 40, which is advantageously made of a plastic. A circumferential groove (not shown), in which the winding of a coil 43, 44, 45 and 46 is located, is cut into the edge surfaces of this base body 40.
  • the coils of the inductors 41 and 42 are connected in series in one of the induction units 10 and the directions of the windings of the coils 43, 44, 45 and 46 connected in series are opposite.
  • the respective container 20 comprises a hollow, shell-shaped lower part 21 and a practically flat cover 22. Both the shell 21 and the cover 22 are thin-walled and they are made of a metal in which eddy currents can be induced.
  • the container 20 made of aluminum is advantageous.
  • the lower part 21 of the container 20 has a rectangular plan, so that it has four side walls 23, 24, 25 and 26 and a bottom 27. The side walls 23, 24, 25 and 26 extend from the bottom 27 and they diverge towards the top.
  • the upper edge of the lower part 21 is with one of the side walls 23, 24, 25 and 26 outwards, i.e.
  • the container lid 22 may have openings (not shown).
  • the eddy currents induced in the thin walls of the container 20 heat the dishes in the containers 20 in a manner known per se.
  • the size of the distance between two superimposed induction units 10 is selected so that the distance between the cover 22 of the Container 20 is as small as possible.
  • the energy which is required for heating or heating food can also be communicated to the container 20 by the induction unit 10 which is located above the container 20, ie in the vicinity of the flat container lid 22.
  • the base area of the respective inductor 41 or 42 which in the case shown also has a rectangular outline, is selected at least as large as the base area of the shell flange 28 or as the outline of the container 20, so that as much energy as possible from the inductors 41 or 42 can be transferred to the respective container 20.
  • the horizontally running induction units 10 form two vertically running rows 11 and 12 in the frame 2.
  • the induction units 10 of the respective row 11 and 12 are assigned with one of their longer edge parts 29 to the inside 59 of the relevant frame side wall 3 and 4, respectively the main plane of the induction units 10 runs practically horizontally.
  • the superimposed induction units 10 of the vertical rows 11 and 12 are thus cantilevered, i.e. arranged protruding from the inside 59 of the respective frame wall 3 or 4.
  • the opposite longer edge portions 18 of the rectangular induction units 10 are thus exposed in the central region of the frame 2 or the housing 1 of the present device.
  • Holders 8 are provided to hold the respective induction unit 10 in place.
  • the respective holder 8 has a base body 13, which is designed as a U-profile 13 in the case shown.
  • This U-profile 13 has a central section 14 and legs 15 and 16 which protrude vertically from the central part 14.
  • the holder 8 is fastened via its central section 14 to the inside of the frame side wall 3 or 4.
  • Several such U-profiles 13 are arranged one above the other, the outer edge portion 29 of one of the induction units 10 being clamped between the outer surfaces 151 and 161 of the legs 15 and 16 of two adjacent U-profiles 13 (FIG. 1). In this way, the induction units 10 define open compartments 19 in the region of the inner surface 59 of the frame side walls 3 and 4 of the present device.
  • the induction units 10 located at the bottom in the housing 1 are arranged at a distance from the base 5 of the furnace 1, this distance being smaller in the example shown than the height of a compartment 19.
  • the base 5, the induction units 10 above and the corresponding sections of the side walls 3 and 4 define a floor space 9 in the housing 1.
  • the furnace 1 or the frame 2 are so wide that the end faces 17 of the inner longitudinal edge parts 18 of the induction units 10 are at a distance A from one another. There is thus a free space between these inner longitudinal edge parts 18 of the induction units 10.
  • the distance A between the inner longitudinal edge parts 18 of the induction units 10 can be chosen so large that the base body 31 of a frame or a carriage 30 can find space between these inner edge parts 18 of the induction units 10.
  • This carriage 30 is intended for receiving containers 20 with dishes which are to be heated or heated at the same time.
  • This dining car 30 extends practically over the entire depth of the induction units 10 or the oven 1 or the frame 2 (FIG. 2).
  • the carriage 30 comprises a chassis 32 with wheels 33 of a type known per se, which can be accommodated in the floor space 9 of the housing 1.
  • the width of the chassis 32 is chosen larger than the distance A between the inner longitudinal edges 18 of the induction units 10 in order to achieve sufficient lateral stability of the carriage 30.
  • a flat base body 31 of the dining car 30 extends approximately from the center of the chassis 32.
  • this base body 31 comprises two plates 311 and 312 running vertically at a distance B from one another and parallel to one another, which extend practically over the entire height of the furnace 1.
  • the distance B between the plates 311 and 312 is smaller than the distance A between the opposing induction units 10.
  • the respective holder 35 comprises a holding section 36, which is U-shaped in the example shown and the main plane of which runs practically horizontally.
  • the thigh is U-shaped in the example shown and the main plane of which runs practically horizontally.
  • the first U-leg 37 is closer to the side wall 3 and 4 and the second U-leg 38 is closer to the base body 31 of the Dining car 30.
  • a connecting piece 39 adjoins this U-leg 38 at one end. The other end of this connecting piece 39 is attached to the base body 31 of the dining car 30.
  • the main dimension of the holding section 36, in the case shown this is the distance between the U-legs 37 and 38, corresponds to the mean distance between the longer side walls 24 and 26 of the rectangular container 20. This enables the legs 37 and 38 hold the food containers 20 at about half the height of the container 20, as shown in FIG. 1.
  • the distance between two superimposed holders 35 is selected such that a holder 35 of the carriage 30 is arranged in a compartment 19 between two induction units 10 of the frame 2. More precisely, the height of the holder 35 is set such that the bottom 27 of the container 20 held by one of the holders 35 is located just above the induction unit 10 located below it, so that the container bottom 27 does not touch this induction unit 10 and therefore does not touch it stands.
  • the holding sections 36 can also be designed differently, in particular if the food containers 20 have a shape other than that described above. The shape of the holding sections 36 should be optimally adapted to the shape of the side walls of the food containers 20.
  • Two superimposed induction units 10, which are designated B and C because of the following explanation form an induction group.
  • This comprises the four inductors 41 and 42 of the two induction units 10 with a total of four windings 43, 44, 45 and 46.
  • the windings 43 to 46 of the inductors 41 and 42 are made from a high-frequency wire and they are connected in series.
  • the electrical connection of the four windings 43, 44, 45 and 46 to one another is shown in FIG. 3.
  • B in FIG. 3 denotes the second lowest left induction unit 10 in FIG. 1.
  • C in FIG. 3 denotes the induction unit 10 which is at the bottom left in FIG. 1. 3, these induction units B and C are shown lying in the same plane.
  • Connection conductors 47 and 48 represent continuations of the beginning and the end of the windings 43 to 46.
  • the respective winding 43 to 46 has rectilinear winding sections 51, 52, 53 and 54. These rectilinear winding sections 51 to 54 are arranged such that they run parallel to one of the edges of the square base body 40 of the respective induction unit 10 or B and C.
  • a strongly curved winding section 55 which represents an arc with a central angle of 90 degrees, is interposed between each two straight winding sections 51 to 54. Through these curved sections 55, the rectilinear sections 51 to 54 of the respective turn are connected one after the other, ie in series, so that together with the curved sections 55 they each represent one of the turns of the windings 43 to 46.
  • the windings 43 to 46 of the inductors 41 and 42 are arranged or oriented in such a way that the straight sections 51 to 54 of the turns of the adjacent inductors 41 and 42 run parallel or at right angles to one another.
  • the areas of the windings 43 to 46 located between the adjacent inductors 41 and 42 of one of the induction units 10 can also be used for heating or heating the food.
  • the first connecting conductor 47 is connected to the turn of the winding 45 of the second inductor 42 of the lower induction unit C, which is on the outside at the edge.
  • the second connecting conductor 48 is connected to the central winding of the winding 46 of the first inductor 41 of the lower induction unit C.
  • the spiral of the winding 46 of the first inductor 41 of the lower induction unit C opens in a clockwise direction.
  • the central turn of the winding 45 of the second inductor 42 of the lower induction unit C is connected to the outer turn of the winding 44 of the second inductor 42 of the upper induction unit B with the aid of a first connecting conductor.
  • the central turn of this winding 44 is connected to the outer turn of the winding 43 of the first inductor 41 of the upper induction unit B with the aid of a further connecting conductor.
  • the central turn of this winding 43 is connected to the outer turn of the winding 46 of the first inductor 41 of the lower induction unit C with the aid of yet another connecting conductor.
  • the spiral of the winding 44 of the second inductor 42 of the upper induction unit B opens in a clockwise direction, while the spiral of the winding 43 of the first inductor 41 of the upper induction unit B opens in a counterclockwise direction.
  • Such a connection of the windings 43 to 46 has the consequence that the current flows in the outer, rectilinear and parallel sections 51 to 54 of the adjacent windings 43 to 46 at the respective time in the same direction.
  • the outer and parallel conductors 51 and 54 of the adjacent inductors do not influence each other unfavorably and therefore these conductors or the inductors 41 and 42 can be arranged so close to one another.
  • FIG. 4 shows a vertical section and an enlarged section of a second embodiment of the present device.
  • This device comprises an oven 58 with a frame 59. From the inner surface 69 of the side wall 57 away from the frame 59, superimposed, practically horizontal and hollow floors 60 protrude like shelves.
  • the respective floor 60 is thus firmly connected with one of its edge parts to the inside 69 of the side wall 57 of the furnace 58 or in one piece with it.
  • the distance between two floors 60 lying one above the other corresponds to the height of a food container 20.
  • the base body 61 of the respective floor 60 comprises two horizontal plates 62 and 63 lying one above the other and practically parallel to one another, between which there is an induction unit 10.
  • the distance between the plates 62 and 63 of a base 60 corresponds to the height of an induction unit 10.
  • the plates 62 and 63 or the base 60 can extend practically over the entire depth (FIG. 2) of the furnace 58 or 1. It is expedient if the length of the plates 62 and 63 corresponds to a sum of two longer sides of the rectangular induction units 10, which are bluntly assigned to one another with their shorter sides.
  • the longer edges of the plates 62 and 63 lying in the interior of the furnace 58 are connected to one another by means of an end wall 64 which is practically at right angles to these plates 62 and 63.
  • This forehead section 65 closes. the floor 60 in the interior of the furnace 58 practically airtight.
  • the end wall 64 and the plates 62 and 63 define a cavity 66 in the interior of the respective base 60.
  • This cavity 66 opens into a practically horizontal slot-shaped opening 67, which is embodied in the outer surface 68 of the side wall 57 of the furnace 58.
  • two induction units 10 are arranged one behind the other in the manner described in connection with FIGS. 1 and 2, which have been pushed into the interior 66 of the base 60 through the outer opening 67 in the side wall 57.
  • the frame 2 of the Oven 58 can be made of a plastic, the shape for the manufacture of frame 2 being such that all floors 60 of a wall 3 or 4 can be produced in a single operation. Another important advantage is that the feed lines, which connect the induction units 10 to one another or to one another, etc., can be passed through the openings 67 opening towards the outside without any problems and unhindered.
  • this design of the frame 2 of the oven 58 enables the use of the dining car 30 already described, it is also possible for the containers 20 to be placed directly on the shelves 60 without having to use the car 30.
  • the frame 81 of this oven 80 has a plate-shaped base 82 which is essentially square, in the illustrated case rectangular.
  • a rear wall 83 extends from one of the sides of the base plate 82, the width of which corresponds to the length of this side of the base plate 82.
  • a side wall 84 extends up from another or one of the longer sides of the base plate 82, the width of which corresponds to the length of this side of the base plate 82.
  • These walls 83 and 84 of the frame 81 are firmly connected not only to the base plate 82 but also to one another via their common vertically extending edges 86, so that the frame 81 of this furnace 80 is a rigid structure.
  • the stability of the frame 81 is increased by an upper wall 79, one side of which is firmly connected to the upper horizontal edge of the rear wall 83 and the side wall 84.
  • the front and one of the sides are open.
  • the underside of the bottom plate 82 of this oven 80 can be provided with rollers 78 so that the oven 80 is mobile, which enables further uses of this oven 80.
  • Elongated holders 88 having slots 87 are fastened to the inside 85 of the frame side wall 84. These elongated holders 88 run practically horizontally and the distance between two holders 88 lying one above the other corresponds approximately to the height of a food container 20 which is to find space between them.
  • the elongated holders 88 advantageously extend over the entire length or width of the side wall 84.
  • the cross section of one of the holders 88 has essentially the shape of the letter A.
  • the area which extends between the ends of the legs of the letter A represents that Base of this holder 88 and the holder 88 is attached to the side wall 84 via this base.
  • the slot 87 extends from the tip of the letter A towards the base area of the holder 88 and the width thereof is selected such that an induction unit 10 fits into this slot 87 such that the induction unit is stuck in this slot.
  • such holders 89 are also on the inside of the rear wall 83, which is at right angles to the side wall 84.
  • the respective one of these second holders 89 is located on the same level as one of the first holders 88 on the side wall 84. Consequently, two edge regions of the respective induction unit 10, which are at right angles to one another, are held in place by two holders 88 and 89.
  • the containers 20 can be placed directly on the plate-shaped induction units 10 or they can be brought between two induction units 10 with the help of the carriage already described. Openings can be made in the bottom of the slots 87 in the holders 88 and 89, which openings end in the base area of the holder 88 and 89, respectively. Through these openings The feed lines of the inductors 10 can pass through and thus reach the outside of the side wall 84.
  • the walls of the furnace 90 consist of profile pieces from which the approximately cuboid frame 91 is composed.
  • the already mentioned holders 88 for receiving the induction units 10 are fastened to the inside of the walls of such a frame.
  • crossing struts 92 and 93 are provided, the ends of which are fastened to the horizontal edges of the frame sides. In the area of the crossing point, the struts 92 and 93 are firmly connected to one another, for example with the aid of a vertically running rail.
  • This frame can also be provided with the rollers 78 already mentioned.
  • FIG. 7 shows a front view of the lower section of a second embodiment of the present device.
  • the design of the furnace 1 in this further embodiment of the present device is essentially the same as that shown in FIG. 1.
  • the food containers 20 are brought into a handling frame 70 for regeneration.
  • This handling frame 70 has a base plate 71 which runs practically horizontally and on the underside of which lubricants, for example skids 72 and 73, are attached.
  • a flat base body 75 of the dining car 30 extends approximately from the Center 71 of the base plate.
  • this base body 75 comprises two plates 751 and 752 which run vertically and at a distance from one another and which extend over the entire height and over practically the entire length or depth of the furnace 1. From the outside of these base plates 751 and 752 there are practically horizontally extending cantilevered flat bottoms 76 on which the food containers 20 can be placed.
  • the height of the respective base 76 above the base plate 71 is selected with respect to the induction units 10 such that the underside of the respective base 76 is as close as possible to the top of the induction unit 10 arranged underneath. This is so that the lower part 21 of the food container 20 is as close as possible to the induction unit 10 arranged underneath.
  • the runners 72 and 73 make it possible, on the one hand, to push the handling frame 70 into the furnace 1 or to pull it out of the furnace 1 again.
  • the runners 72 and 73 allow the handling frame 70 to be set up on a serving trolley (not shown) with the regenerated food practically without sliding. With this handling rack 70 loaded with the regenerated food, one can drive to the guests and distribute the food directly from the handling rack 70 to the guests, without reloading the food containers 20 between the regeneration of the dishes in the oven 1 and the distribution to the guests to have to.
  • FIG. 8 shows a side view of a further embodiment of the present device, which can serve as a tunnel furnace.
  • FIG. 9 shows a horizontal section AA through the device according to FIG. 8.
  • three individual ovens 58 are connected one behind the other, tightly and in such a way that the wagons 30 or the handling racks 70 move from an individual oven 58 to others can be moved.
  • An arrow R indicates the direction of movement of the food containers 20 in the tunnel oven.
  • three receptacles 30 and 70 for the food containers 20 can be located one behind the other in the tunnel oven and can advantageously be moved intermittently in the direction indicated.
  • 9 shows the position of the induction units 10 in the tunnel furnace.
  • the version of the furnace 58 shown in FIG. 4 is best suited for such an embodiment of the present device.
  • the plates 62 and 63 of the respective base 60 together with the end wall 64 lying inside the furnace 58 define a cavity 66 , which opens into the outer surface 68 of the side wall 3 or 4 of the furnace 58 with an opening 67.
  • Feed lines, which connect the induction units 10 to one another or to one another, etc., can be guided through these openings 67.
  • the feed lines can thus only be routed on the outer surface 68 of pages 3 and 4 and on the outside of the ceiling of the furnace 58, so that the end faces of the tunnel are free and are free for the introduction of the trolleys 30 or the handling racks 70 into the tunnel furnace.
  • a trolley 30 or a handling frame 70 can accommodate 36 food containers 20, for example. 8 or 9 can accommodate 108 food containers 20, which is particularly advantageous especially when catering for a large number of people. In the case of mass catering, however, the individual ovens 1 and 58 can also be arranged next to and / or one above the other.
  • the frame or the housing 101 of this furnace 100 essentially has the shape of the housing 2 of the furnace 1 1.
  • the frame 101 can, however, be designed in more detail as described in connection with FIG. 4.
  • the respective floor 102 of this frame 101 is made of solid or solid material and is integral with the relevant side wall of the frame 101.
  • a depression 103 (FIG. 11) is made in the top of the respective bottom 102 from above. The dimensions of this depression 103 are selected such that at least one of the induction units 10 can be let into this depression 103 such that the surface of this induction unit 10 is flush with the surface 104 of the bottom 102.
  • the top of the induction unit 10 is provided with a laterally projecting, advantageously circumferential collar 105 which lies in a groove 106 in the upper edge of the depression 103.
  • the feed lines 47 and 48 for the respective induction unit 10 are guided through the side wall 107 of the frame 101.
  • the containers 20 with the food can stand on the inductor 10 embedded in the floor 102 or they can be held at a distance above the floor 102 by means of the trolley 30 or holder 35.
  • This circuit arrangement has a powerful generator 110 of alternating current, the frequency of which is common for the operation of induction units 10. This frequency is between about 22 and 30 kHz.
  • LC branches 111 are connected in parallel to one another between the output terminals of this generator 110. Each of these branches 111 comprises a capacitor 112 and at least one coil 113 connected in series therewith. The respective coil 113 is represented by one of the windings 43 to 46 (FIG. 2). In the case shown in FIG. 12, there are six each
  • Coils 113 connected in series with the respective capacitor 112. With six branches 111 shown in FIG. 12, a single generator 110 can supply thirty-six coils 113 with energy, which are connected to the generator in this way.
  • the resonance frequency of the branches 111 is expediently below 20 kHz.
  • the frequency of the feed current from the generator 110 is between 22 and 30 kHz, ie above the resonance frequency of the branches 111. If a feed container 20 is assigned to one of the coils 113 in one of the branches 111, then the phase angle between them Supply voltage and the feed current at this coil 113 to a minimum value, so that energy is delivered to this feed container 20. If no feed container 20 is assigned to one of the coils 113 in one of the branches 111, then the phase angle between the feed voltage and the feed current has a value which is almost 90 degrees. With this phase shift, a minimal current flows through the coil 113 and no energy is emitted through this coil 113. It is understood that the respective branch 111 can also have a different number of coils 113, whereby also it is possible for the branch 111 to have only a single coil 111.
  • Fig. 13 shows a second circuit arrangement which can solve the problem mentioned above.
  • This circuit arrangement comprises a clock generator 115, to which heating circuits 116 are connected.
  • the respective heating circuit 116 comprises a powerful output stage 117, to the output of which a series resonant circuit 118 is connected.
  • This resonant circuit 118 includes a capacitor 112 and a coil 113.
  • This coil 113 can be one of the windings 43 to 46 of the furnace, as was shown above. Since all coils 113 of the furnace run synchronously because of the clock generator 115, the adjacent coils 113 lying close to one another in the bottoms of the furnace cannot negatively influence one another.
  • the respective series resonant circuit 118 functions essentially the same as the resonant circuits 111 described above.
  • the circuit arrangement according to FIG. 13 has a certain disadvantage, namely that the circuit arrangement according to FIG. 13 requires a number of power stages 117 , which equals the number of series resonant circuit 118.
  • FIG. 14 shows a top view of a further embodiment of the present device, which is designed as a so-called warming dispenser 95.
  • Warming dispensers 95 generally have a horizontally running surface 96 on which the food to be dispensed is placed in the containers 20 described above.
  • Such warming issues 95 are usually in the form of a table.
  • the containers 20 are placed on the table 96 and are accessible from above.
  • the individual dishes can be removed from the relevant containers 20 on the warming counter 95.
  • induction units 10 are assigned to the horizontal surface 96.
  • induction units 10 are expediently embedded in the horizontal surface 96, so that the containers 20 can only partially stand on the induction unit 10 in question.
  • the induction unit 10 form two rows. It is understood that there can also be a different number of rows of induction units 10. The number of induction units 10 in a row can also be expediently selected.
  • a row can have, for example, eighteen induction units 10, so that such a warming output 95 then comprises thirty-six induction units 10.
  • the inductors of the induction units 10 are connected to one another and then jointly to at least one generator 110, as has been explained above in connection with FIGS. 12 and 13.
  • the present device can be used in particular for the regeneration of meals on board aircraft, in rail cheeks and in buses, and for catering.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Cookers (AREA)

Abstract

Dispositif qui comporte un corps de base (1) pourvu de parois latérales (3, 4), et des unités d'induction (10) placées les unes au-dessus des autres, planes et à extension horizontale entre lesquelles peuvent être introduits des récipients (20) pour les plats à préparer. Les unités d'induction (10) sont associées au niveau de l'une (29) de leurs parties de bordure à la paroi latérale concernée (3, 4), si bien que lesdites unités d'induction (10) forment le fond de compartiments (19) ouverts. Ledit dispositif comporte également un chariot (30) possédant un corps de base (31) à extension pratiquement verticale. Des éléments de retenue (35) pour les récipients (20) font saillie à partir des côtés du corps de base (31) du chariot. Chaque récipient (20) se trouve entre deux unités d'induction situées l'une au-dessus de l'autre.
EP05706543A 2004-03-03 2005-03-03 Dispositif de traitement de produits alimentaires Withdrawn EP1720436A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3522004 2004-03-03
PCT/CH2005/000124 WO2005084503A1 (fr) 2004-03-03 2005-03-03 Dispositif de traitement de produits alimentaires

Publications (1)

Publication Number Publication Date
EP1720436A1 true EP1720436A1 (fr) 2006-11-15

Family

ID=34916945

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05706543A Withdrawn EP1720436A1 (fr) 2004-03-03 2005-03-03 Dispositif de traitement de produits alimentaires

Country Status (3)

Country Link
US (1) US20100301037A1 (fr)
EP (1) EP1720436A1 (fr)
WO (1) WO2005084503A1 (fr)

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Publication number Priority date Publication date Assignee Title
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