CONTINUOUS GRILL AND COOKING METHOD

Abstract

A continuous grill with at least two grill rollers forming at least one grilling gap, in one aspect, includes an assembly capable of rotating relative to and projecting out of or into at least one roller. An inner rotary bearing is disposed between this roller and assembly and/or this assembly is mounted on a housing of the grill or on a carrier group mounted immovably relative to the housing. In another aspect, the grill includes at least one electrically designed and/or locally measuring thermometer disposed inside at least one roller. In a further aspect, the grill includes at least one roller coated with a non-stick coating or enameled. A method for cooking of products for grilling on a continuous grill regulates the speed of throughput of the product for grilling through the gap and/or the temperature of at least one roller as a function of certain parameters.

Claims

1-37. (canceled)

38. A continuous grill (10) with at least two, preferably three grill rollers (20) forming at least one grilling gap (13), comprising an assembly that is capable of rotating relative to at least one grill roller (20) and that projects out of this grill roller (20) and/or projects into it, wherein an inner rotary bearing (28) is disposed between this grill roller (20) and this assembly and/or wherein this assembly is mounted on a housing (11) of the continuous grill (10) or on a carrier group (38) mounted immovably relative to the housing (11).

39. The continuous grill (10) according to claim 38, wherein an inner rotary bearing (28) is disposed, at both ends of the at least one grill roller (20), between this grill roller (20) and the assembly or a further assembly, capable of rotating relative to this grill roller (20), projecting out of it and/or projecting into it.

40. The continuous grill (10) according to claim 38, wherein the carrier group (38) comprises a retaining bracket (37).

41. The continuous grill (10) according to claim 38, wherein the assembly comprises a heating unit (30) and/or a thermometer (40) or a carrier element, especially for the heating unit (30) and/or the. thermometer (40).

42. The continuous grill (10) according to claim 38, wherein the at least one grill roller (20) is mounted rotatably via an outer rotary bearing (29) on a housing (11).

43. The continuous grill (10) according to claim 38, wherein at least one of the rotary bearings (28, 29) is a sliding bearing.

44. The continuous grill (10) according to claim 38, wherein the mounting takes place via an insulating unit (36), preferably via an insulating layer (37).

45. A continuous grill (10) with at least two, preferably three grill rollers (20) forming at least one grilling gap (13), comprising at least one electrically designed and/or locally measuring thermometer (40) disposed inside at least one of the grill rollers (20).

46. The continuous grill (10) according to claim 45, wherein the thermometer (40) is a resistance thermometer (41) or a thermocouple (42).

47. The continuous grill (10) according to claim 45, wherein the thermometer (40) comprises a color sensor (43) and a heat-sensitive color-changing area (44) on an inside wall (23) of the grill roller (20).

48. The continuous grill according to claim 41, wherein the thermometer (40) is attached on or in the heating unit (30).

49. The continuous grill (10) according to claim 48, wherein the heating unit (30) comprises a heating cartridge (33) disposed inside at least one of the grill rollers (20) and the thermometer (40) is attached on or in the heating cartridge (33).

50. A continuous grill (10) with at least two, preferably three grill rollers (20) forming at least one grilling gap (13), comprising at least one grill roller (20) coated with a non-stick coating or enameled.

51. The continuous grill (10) according to claim 50, wherein the non-stick coating is a Teflon@ coating, preferably with a color indicator.

52. The continuous grill (10) according to claim 38, comprising means (15) for varying the grilling gap (13).

53. A cooking method for cooking of products for grilling on a continuous grill (10) with at least two, preferably three grill rollers (20) forming at least one grilling gap (13), wherein (i) the speed of throughput of the product for grilling through the grilling gap (13) is regulated as a function of the type of product for grilling, of a roller contact pressure, of the size of the grilling gap (13) and/or of a temperature-measuring unit and/or wherein (ii) the temperature at least of one of the grill rollers (20) is regulated as a function of the type of product for grilling, of a roller contact pressure, of the size of the grilling gap (13) and/or of a speed of throughput of the product for grilling through the grilling gap (13).

54. The cooking method according to claim 53, wherein the temperature-measuring unit comprises a locally measuring thermometer (40) and/or heat-sensitive color-changing area (44).

55. The cooking method according to claim 53, wherein the type of product for grilling is indicated via an input means (69) provided on the continuous grill (10).

56. The cooking method according to claim 53, wherein the temperature at least of one of the grill rollers is electronically regulated.

57. The cooking method according to claim 53, wherein, before an end of the cooking process, at least one of the grill rollers (20) revolves without heating, if necessary with a reversal of direction, and a mechanical cleaning means, such as a cleaning sponge, a cleaning brush (81) or a cleaning pad (82) is passed along the grill roller (20) as it continues to revolve.

58. The cooking method according to claim 53, wherein a cleaning is performed only when a drop, preferably indicated by the continuous grill (10), has taken place below a cleaning temperature limit.

Description

[0076] Further advantages, objectives and properties of the present invention will be explained on the basis of following description of exemplary embodiments, which in particular are also illustrated in the attached drawing, wherein:

[0077] FIG. 1 shows a perspective schematic view of a continuous grill;

[0078] FIG. 2 shows two schematic sections through a first grill roller;

[0079] FIG. 3 shows two schematic sections through a second grill roller;

[0080] FIG. 4 shows two schematic sections through a third grill roller;

[0081] FIG. 5 shows two schematic sections through a fourth grill roller;

[0082] FIG. 6 shows two schematic sections through a fifth grill roller;

[0083] FIG. 7 shows two schematic sections through a sixth grill roller;

[0084] FIG. 8 shows a schematic side view of a seventh grill roller;

[0085] FIG. 9 shows a schematic detail view of the exhaust unit;

[0086] FIG. 10 shows a schematic cross section through a continuous grill with first mechanical cleaning means;

[0087] FIG. 11 shows a schematic cross section through a continuous grill with second mechanical cleaning means;

[0088] FIG. 12 shows a schematic side view of an eighth grill roller;

[0089] FIG. 13 shows a schematic elevation view of a rotary bearing;

[0090] FIG. 14 shows a schematic elevation view of a further rotary bearing;

[0091] FIG. 15 shows a schematic side view of a ninth grill roller;

[0092] FIG. 16 shows a schematic side view of a tenth grill roller;

[0093] FIG. 17 shows a schematic side view of an eleventh grill roller;

[0094] FIG. 18 shows a schematic side view of a twelfth grill roller;

[0095] FIG. 19 shows a schematic diagram of grilling-gap varying means; and

[0096] FIG. 20 shows a schematic diagram of a regulating unit for continuous grills.

[0097] The continuous grill 10 illustrated schematically in FIG. 1 has three grill rollers 20, which are disposed in a housing 11.

[0098] The grill rollers 20 form a grilling gap 13, through which product for grilling, which is introduced from above into the grilling gap 13 in an inlet 16, is able to pass, in order that when grilled it then exits therefrom at an outlet 17 and arrives on a discharge grate 12, from which it may then be removed from the continuous grill 10.

[0099] One of the grill rollers 20 is displaceable along a guide path representing grilling-gap varying means 15, so that in this way the grilling gap 13 can be adapted to product for grilling with different thickness. Alternative grilling-gap varying means 15 are shown by way of example in FIG. 19.

[0100] The grill rollers 20 are driven via a schematically illustrated motor 14.

[0101] The motor 14 drives toothed gears 18, which in turn drive the grill rollers 20, as illustrated by way of example in FIG. 19. The axis of rotation of the large toothed gear 18 of FIG. 19 corresponds to the axis of revolution around which the grilling-gap varying means 15 displace the corresponding roller 20, so that the rotary forces can be transmitted simply and without complication. In a selected embodiment, this roller 20 may be biased in the gap symbolizing the grilling-gap varying means 15 via a spring in the direction of the other grill roller 20, so that the adaptation of the grilling gap 13 to the product for grilling takes place automatically. The deflection is then a direct measure of the thickness of the product for grilling or of grilling gap 13.

[0102] The motor 14 is equipped with a torque-sensing unit 61 (schematically illustrated), which monitoring means 60 represent, by way of which the grilling gap 13 can be monitored for the presence of product for grilling in the grilling gap 13. Likewise an ultrasonic sensor 62, which as monitoring means 60 monitors the grilling gap 13 with ultrasound for any product for grilling that may be present, is provided on the housing 11. Furthermore, the monitoring means 60 further comprise pressure sensors 63, which measure any pressure that product for grilling present in the grilling gap 13 may exert on two of the grill rollers 20. Any measuring means that may be present for measurement of the thickness of the grilling gap 13, for example via the grilling-gap varying means 15, may also be used as monitoring means 60. It will be understood that, if necessary, different embodiments may dispense with some or all of the monitoring means 60.

[0103] As illustrated by way of example in FIG. 19, a feeder 19 for product for grilling, which in the manner of a sliding guide delivers product for grilling or cooking to the grilling gap 13, when the latter is fed to the feeder 19 for product for grilling, may be mounted on the housing 11. In particular, several individual pieces of product for grilling or cooking may be stocked in a feeder 19 for product for grilling that is adequately large-dimensioned, and then delivered successively to the grilling gap 13 by gravity. In alternative embodiments, the feeder 19 for product for grilling may also be joined solidly to the housing 11.

[0104] The housing 11 comprises three sub-housings 57, 58, 59, of which the grill rollers 20 are disposed in one sub-housing 57, whereas the motor 14 is located in the second sub-housing 58. The third sub-housing 59 is spaced apart from the grill rollers 20 by the second sub-housing 58 and serves in particular as the enclosure for electronic unit 66 (see FIG. 20), which in this way is insulated via sub-housing 58 from the grill rollers 20 and from the temperatures induced by these in the continuous grill 10.

[0105] Furthermore, the continuous grill 10 has an exhaust unit 70 (see FIGS. 1 and 9), which extends into the sub-housing 57 and serves to extract air from the grilling gap 13 or from the sub-housing 57, in order in this way to reduce odors or any potential contaminations to a minimum.

[0106] As illustrated in particular in FIG. 9, the exhaust unit 70 comprises a fan 72, driven by a fan motor 71, which extracts air from the grilling gap 13 or from the sub-housing 57 through a metallic filter 73, which is held by a filter holder 74. For this purpose, the fan 72 is situated in an exhaust duct 76, which leads through the housing 11 to an exhaust-air duct 75, which can be connected from outside. Via the exhaust-air duct 75, the air may then be removed to the outside, in order in this way to reduce an odor contamination.

[0107] In a different embodiment, provided a sufficient cleaning takes place by the filter 73 and the air sucked in is not too hot due to the air flow, the exhaust duct 76 may discharge into the sub-housing 58 or into the sub-housing 59, in order in this way to permit an air cooling of these sub-housings 58, 59.

[0108] The exhaust unit 70 is dimensioned such that an adequate air stream through the inlet 16 and the outlet 17 can be ensured in the housing 11, while allowing for any leakage points that may be present in the housing 11, for example such as slits between cover plates, miniature openings in the region and threads or rivets or the like.

[0109] Depending on specific construction of the continuous grill 10, the grill rollers 20 may be heated or unheated. Different configurations are also conceivable with respect to the nature of the heating unit.

[0110] Thus, as illustrated by way of example in FIG. 2, at least one of the grill rollers 20 may be equipped with a heating unit 30 in the form of a heating coil, which is disposed helically inside the grill roller 20. A thermometer 40, which is formed as resistance thermometer 41 in the exemplary embodiment illustrated in FIG. 2, may also be is disposed in the grill roller 20. In the exemplary embodiment illustrated in FIG. 2, the thermometer 40 is situated in the middle of the grill roller 20, althoughdepending on specific requirementsanother location may also be selected here, if a corresponding temperature sensing is desired. It will be understood in particular that several thermometers may also be provided if necessary, especially even different thermometers, which are positioned appropriately.

[0111] As an example, however, heating bars 32, as illustrated by way of example in FIG. 3, may also be used as heating unit 30. In this exemplary embodiment, four heating bars 32 are disposed in the grill roller 20, parallel to one another and parallel to the axial direction of the grill roller 20. In this exemplary embodiment, they are aligned equidistant to one another, although in other embodiments a nonuniform distribution may also be selected if necessary, if a correspondingly nonuniform distribution of the temperature is also desired.

[0112] In the exemplary embodiment illustrated in FIG. 3, a thermocouple 42, which is situated on a central plane, although not at the center but instead in the vicinity of an inner wall 23 of the grill roller 20, in order to be able to measure the temperature there locally as accurately as possible, is disposed as thermometer 40 inside the grill roller 20. It will be understood that, in a different embodiment, another thermometer 40 may be selected here also. In particular, it is also conceivable to dispose thermometer 40 elsewhere or even to provide several thermometers 40.

[0113] The heating unit of the exemplary embodiment according to FIG. 4 corresponds substantially to the heating unit 30 of the exemplary embodiment according to FIG. 3. As thermometer 40, however, a color-changing area 44, which changes its color when the temperature rises above or falls below a temperature limit, is disposed on the inside wall 23 of the grill roller 20. The color inversion or the color change may be sensed via a color sensor 43, which is disposed inside the grill roller 20 and is directed toward the color-changing area. In the present exemplary embodiment, the color inversion or the color change is provided at a temperature above which grilling is possible.

[0114] In the grill rollers 20 illustrated in FIGS. 5 to 7, a heating cartridge 33 is respectively used as heating unit 30. In the exemplary embodiment illustrated in FIG. 5, the heating cartridge 33 is relatively small and eccentrically disposed, so that the distance to the inside wall 23 of the grill roller 20 is shorter than the half inside radius of the grill roller 20.

[0115] In contrast, the heating cartridge 33 of the heating unit 30 according to FIGS. 6 and 7 is configured to be much larger and to leave a continuous annular gap, amounting to eight per cent of the inside radius of the grill roller 20, relative to the inside wall 23 of the grill roller 20.

[0116] In the exemplary embodiment according to FIG. 6, the thermometer 40, which in this exemplary embodiment is formed as thermocouple 42, is situated on the heating cartridge 33. In view of the very small annular gap relative to the inside wall 23 of the grill roller 20, it can be assumed that this thermocouple 42 is also able to measure the temperature at the inside wall 23 of the grill roller 20 relatively accurately, by the fact that the thermocouple 42 is thermally insulated as well as possible inwardly toward the heating cartridge 33.

[0117] In the exemplary embodiment according to FIG. 7, the thermocouple 42 is cast in the heating cartridge 33, and so the temperature of the heating cartridge 33 can be measured very accurately and then this can also be regulated effectively in its temperature with a corresponding electronic unit, such as electronic unit 66, or temperature-regulating unit 68.

[0118] In the exemplary embodiment according to FIG. 5, the thermocouple is disposed in self-supported manner in the vicinity of the inside wall.

[0119] The thermometer 40 and the heating units 30 are respectively supplied with energy via electrical terminals 51, 52, which project out of the grill rollers 20, or are connected to the electronic unit 66 or to another electronic control unit.

[0120] In this connection, the electrical terminals 51, 52 in the exemplary embodiments illustrated in FIGS. 5 to 7 are respectively situated at one end of the respective heating unit 30 or heating cartridge 33, so that these may also be connected easily to the electronic unit 66 on the corresponding housing side. It will be understood that the exemplary embodiments illustrated in FIGS. 2 to 4 may also be configured in such a way by heating coils 31 appropriately laid in loops or by heating bars 32.

[0121] Via the thermometers 40, which in these exemplary embodiments are all configured electrically and measure locally, the temperature of the heating unit 30 and/or the speed of revolution of the grill rollers 20 maydepending on specific activationbe regulated, for which purpose the electronic unit 66 with its speed-regulating unit 67 and its temperature-regulating unit 68 is used (see FIG. 20). This regulation can be achieved much more reliably than is the case with known integrating measuring thermometers, such as represented by expansion rods, for example. It will be understood, however, that such integrating measuring thermometers 40 or other non-electrically acting thermometers may also be used in different embodiments.

[0122] Depending on specific implementation, the embodiments illustrated in FIGS. 2 to 7 may be combined or varied, by interchanging the heating units 30 and the thermometers 40 or positioning them differently.

[0123] Under some circumstances, a variation of the grilling gap via the grilling-gap varying means 15 illustrated by way of example in FIG. 1 is very complex and undesired, and so a grill roller 20 comprising two sub-rollers 21, 22 may be used if necessary, as illustrated by way of example in FIG. 8. These two sub-rollers 21, 22 have different diameters and are otherwise, however, configured cylindrically, which accordingly leads, in interplay with the other grill roller 20, to a varying grilling gap 13.

[0124] As illustrated in FIG. 10, cleaning brushes 81 may bear scrapingly on grill rollers 20, which is advantageous in particular for grill rollers 20 of stainless steel. Residues of product for grilling that adhere to the grill roller 20 may then be scraped off and removed via the cleaning brushes 81.

[0125] Depending on specific embodiment, these cleaning brushes 81 may scrape constantly along the grill rollers 20 and thus perform their cleaning task constantly, or else may be constructed to be swung closed or open according to need.

[0126] Such cleaning brushes 81 may also be used, for example, for grill rollers 20 provided with an enamel layer.

[0127] However, the constant rubbing load appears to be too aggressive for grill rollers 20 provided with a non-stick coating, such as Teflon, for example, and so a cleaning pad 82, for example, may be used here, as illustrated by way of example in FIG. 11. This may then be conveyed by the rotating grill rollers 20 along the grilling gap 13 and furnish its cleaning performance. In this connection, it is possible to match the material of the cleaning pad 82 to the surface of the respective grill rollers 20. Preferably, the cleaning takes place only when the temperature has fallen below a cleaning-temperature limit. As an example, this cleaning-temperature limit may be measured by the thermometers 40, as already described in the foregoing, and indicated to a user via the electronic unit 66 of the continuous grill 10 and a corresponding display 68 (see FIG. 20).

[0128] It will be understood that the direction of revolution of the grill rollers 20 may also be reversed for cleaning if necessary, when this seems advantageous.

[0129] In the arrangements schematically illustrated in FIGS. 6 and 7, it proves relatively difficult to position the heating cartridge 33 correctly relative to the grill roller 20. For this purpose, the heating cartridge 33 may have bearing journals 39 or bearing points 34 (numbered by way of example), by means of which the heating cartridge 33 is mounted rotatably via an inner rotary bearing 28 on the grill roller 20, as illustrated by way of example in FIGS. 12 and 15. This permits an extremely stable mounting of the heating unit 30 relative to the grill roller 20. Cumulatively or alternatively, a mounting of the heating cartridge 33 that is immovable relative to the housing 11 may be achieved via the bearing journals 39 or corresponding bearing points 34 on the heating cartridge 33, as is illustrated by way of example in FIGS. 16 to 18.

[0130] Depending on specific construction, a rolling bearing or a sliding bearing may be used as rotary bearing, in which caseas illustrated in particular in FIGS. 13 and 14sliding bearings have proved to be particularly advantageous.

[0131] As an example, therefore, a plastic ring may be used as inner rotary bearing 28, as illustrated by way of example in FIG. 13. In particular, such a plastic ring may also act in thermally insulating manner or as insulating unit 36, especially with respect to the heating cartridge 33. In order to increase the thermal insulation capacity, it is also conceivable, for example, to equip the plastic ring with radial stays, so that potential heat conduction via the material is reduced.

[0132] In an embodiment that is different and illustrated schematically in FIG. 14, the surface of the grill roller 20 and the surface of the heating cartridge 33 slide directly on one another, wherein the region of the heating cartridge 33 that comes into contact with the grill roller 20 is equipped, as insulating unit 36, with radially inwardly directed recesses for a reduction of the heat transfer, so that only a very small contact area remains.

[0133] Depending on specific embodiment, the heating cartridge may, for example, also be fastened permanently in the housing 11 of the continuous grill 10 (see FIGS. 16 to 18), so that the grill roller 20 may also be stably mounted via the inner rotary bearing 28 and a further bearing for the grill roller 20 is not necessary.

[0134] Preferably, however, the grill roller 20 is mounted respectively via an outer rotary bearing 29 in the housing 11, so that, above all, the heating cartridge 33 is insulated as well as possible from the other assemblies of the continuous grill 10. Then it needs to be stabilized merely in its direction of revolution, which can already be achieved, for example, by the electrical terminals (not illustrated in FIG. 12), which may correspond in particular to the arrangements illustrated in FIGS. 6 and 7.

[0135] As is immediately obvious, a demounting of the arrangement of heating cartridge 33 and grill roller 20, as is illustrated in FIG. 12, is relatively complex, since roller journals of the grill roller 20 must be removed in order that the heating cartridge 33 can be pulled out of the grill roller 20 or pushed into it.

[0136] The arrangement according to FIG. 15 is helpful here, in which the grill roller 20 has a substantially cylindrical inside diameter, which is characterized in particular in that the ends of the grill roller 20 are larger in their diameter than the heating cartridge 33, so that this can be easily removed and inserted if necessary.

[0137] It will be understood that other or further assemblies, which are to be disposed inside the grill roller 20 may also be mounted or held if necessary via the inner rotary bearing 28.

[0138] The exemplary embodiment illustrated in FIG. 16 corresponds substantially to the exemplary embodiment according to FIG. 12, although the bearing journals 39 forming the bearing points 34 here are fastened in a sleeve (not separately numbered) functioning as insulating unit 36 on a retaining bracket 37, which functions as carrier group 38 for fastening on the housing 11.

[0139] In the exemplary embodiment illustrated in FIG. 17, a heating cartridge 33 corresponding to the exemplary embodiment of FIG. 15 is used, but its bearing journals 39 respectively have, in front of the ends of the heating cartridge 33, bearing points 34, via which the heating cartridge 33 is clamped with the retaining bracket 37 functioning as the carrier group 38. In this connection, the retaining brackets 37 interact with the heating cartridge 33 at a pinpoint position at the bearing points 34, so that a thermal resistance that acts as insulating unit 36 is formed here.

[0140] Similar pinpoint heat transitions are formed in the exemplary embodiment illustrated in FIG. 18 by threaded bolts (not numbered), which are screwed into the retaining brackets 37 likewise used there and are seated on bearing points 34 of the heating cartridge 33. Furthermore, insulating unit layers 35 in the form of plastic washers are additionally provided in this exemplary embodiment between the retaining bracket 37 or the carrier group 38 and the housing 11, in order to boost the insulating unit 36. It will be understood that other forms of insulating layers 35, such as films or lacquers or the like, may also be provided in different embodiments.

[0141] The heating cartridge 33 illustrated in FIG. 18 does not have any bearing journals 39 formed or molded-on separately, which in this embodiment merge cylindrically into the heating cartridge 33. It will be understood that, with suitable adaptation of the carrier group 33 and the retaining unit, other types of bearing points 34 or bearing journals 39 may also be used for this purpose.

[0142] The embodiments illustrated in FIGS. 16 to 18 may be combined without difficulty with the embodiments of FIGS. 12 to 15 when, for example, the carrier groups 38 and/or insulating units 36 of the embodiments illustrated in FIGS. 16 to 18 are added in the embodiments according to FIGS. 12 to 15 or when, for example, an inner rotary bearing is also used in the embodiments according to FIGS. 16 to 18, in which case the outer rotary bearing 29 may then be dispensed with if necessary.

[0143] In particular, the exemplary embodiments illustrated in FIGS. 12 to 18 may be equipped with electrical terminals, as are disclosed by way of example in FIGS. 5 to 7, in which case the electrical terminals may if necessary be routed through or past the respective retaining brackets 37 or carrier groups 38.

[0144] The electronic unit 66 comprises on the one hand a speed-regulating unit 67 for at least one of the driven grill rollers 20, wherein, if all grill rollers 20 are driven as according to the exemplary embodiment according to FIG. 19, all grill rollers 20 are also correspondingly regulated, since the electronic unit 66 activates the motor 14. On the other hand, the electronic unit 66 comprises a temperature-regulating unit 68 for the heating unit 30, in that this is activated correspondingly to the desired temperature, in which case the measured results of the thermometer 40 are substantially definitive here.

[0145] Furthermore, the monitoring means 60 and input means 69 function as input variables in the electronic unit 66, wherein the input means 69 permit the indication of the nature of the product for grilling, for example whether fish, chicken, beef or pork.

[0146] In the exemplary embodiment illustrated in FIG. 20, a rotary switch functions as input means 69, in which case a key bar or a keyboard, a touch screen or similar may also be safely used.

[0147] The electronic unit also activates a display 65, which indicates on the one hand the selected product for grilling and on the other hand the attainment of a cleaning temperature. Alternatively thereto or cumulatively therewith, the attainment of the preset temperature for grilling, the current temperature or even other information, such as the options for selection of product for grilling, may also be indicated, or, as regards complex input options, so may also the instantaneous input.

LIST OF REFERENCE SYMBOLS

[0148] 10 Continuous grill [0149] 11 Housing [0150] 12 Discharge grate [0151] 13 Grilling gap [0152] 14 Motor [0153] 15 Grilling-gap varying means [0154] 16 Inlet [0155] 17 Outlet [0156] 18 Toothed drive gears [0157] 19 Feeder for product for grilling [0158] 20 Grill roller [0159] 21 Sub-roller [0160] 22 Sub-roller [0161] 23 Inside wall [0162] 28 Inner rotary bearing [0163] 29 Outer rotary bearing [0164] 30 Heating unit [0165] 31 Heating coil [0166] 32 Heating bar [0167] 33 Heating cartridge [0168] 34 Bearing point [0169] 35 Insulating layer [0170] 36 Insulating unit [0171] 37 Retaining bracket [0172] 38 Carrier group [0173] 39 Bearing journal [0174] 40 Thermometer [0175] 41 Resistance thermometer [0176] 42 Thermocouple [0177] 43 Color sensor [0178] 44 Color-changing area [0179] 51 Electrical terminal [0180] 52 Electrical terminal [0181] 57 Sub-housing [0182] 58 Sub-housing [0183] 59 Sub-housing [0184] 60 Monitoring means [0185] 61 Torque-sensing unit [0186] 62 Ultrasonic sensor [0187] 63 Pressure sensor [0188] 65 Display [0189] 66 Electronic unit [0190] 67 Speed-regulating unit [0191] 68 Temperature-regulating unit [0192] 69 Input means [0193] 70 Exhaust unit [0194] 71 Fan motor [0195] 72 Fan [0196] 73 Filter [0197] 74 Filter holder [0198] 75 Exhaust-air duct [0199] 76 Exhaust duct [0200] 81 Cleaning brush [0201] 82 Cleaning pad