JP6365882B2 - Cooker - Google Patents

Description

  The present invention relates to a cooking device used in a kitchen of a general household, a commercial kitchen, and the like, and more particularly, to a grill cooking device in which a cooking object is housed in a cooking chamber and induction heated.

  The grill cooker of the heating cooker has a configuration in which heating means are provided above and below the cooking chamber to heat the cooking object stored in the cooking chamber. As a heating means in the grill cooker, a structure using a sheathed heater of a resistance heating element (see, for example, Patent Document 1), or a cooking dish housed in a cooking cabinet by flowing a high-frequency current through an induction heating coil A configuration has been proposed in which the cooking dish is induction-heated by Joule heat caused by eddy current generated in, and the cooking object on the cooking dish is heated (see, for example, Patent Document 2).

In a conventional grill cooker in which resistance heating elements are provided as heating means above and below the cooking chamber, the cooking plate is heated by heat conduction and heat radiation from the heating unit through the bottom surface of the cooking chamber. The cooking object placed on the cooking pan thus heated is heated and cooked in the cooking chamber of the grill cooker.
In addition, when cooking the cooking object using induction heating, the cooking dish is formed of a material capable of induction heating, such as iron or stainless steel, for induction heating of the cooking dish on which the cooking object is placed. . Furthermore, in the grill cooker, automatic temperature control is performed by detecting the temperature of the cooking object in order to improve cooking performance and save labor.

JP 2012-217785 A JP 2012-104261 A

  In a conventional grill cooker of a heating cooker, in the configuration in which resistance heating elements as heating means are provided above and below the cooking chamber, the heat transfer is high and the heat distribution is high so that the cooking dish can be efficiently heated by the heating means. Made of good metal. In such a configuration, the conventional grill cooker is provided with temperature detection means such as an infrared sensor below the bottom of the cooking chamber to detect the temperature of the cooking pan and perform temperature control. However, since a resistance heating element as a heating means is provided below the bottom of the cooking cabinet, it is a high temperature environment, and there is a problem in temperature detection with high accuracy by the temperature detection means. In addition, since the entire bottom surface of the cooking dish is heated to a high temperature by the heating means from below, the temperature of the cooking object placed on the cooking dish, for example, food such as fish, meat, etc. It was difficult to detect accurately.

  On the other hand, in a conventional grill cooker that induction-heats a cooking dish, the cooking dish is made of a material that can be induction-heated, for example, a material having a large specific gravity such as iron or stainless steel. It was not easy to handle. Moreover, although accurate temperature detection is important in order to perform automatic temperature control with respect to a cooking object, when the environmental temperature of the temperature detection means is high, accurate temperature detection was difficult. Furthermore, in order to detect the temperature of the food on the cooking plate, for example, food such as fish and meat, when the heating means is arranged below the cooking plate and the bottom temperature of the cooking plate is detected, induction heating is performed. The entire bottom surface of the cooking pan heated by induction with the coil was at a high temperature, and the temperature of the food placed on the cooking pan could not be accurately detected.

  Further, in the conventional grill cooker, the cooking dish in the cooking chamber is directly placed on the insulating plate, and the bottom surface of the cooking plate and the upper surface of the insulating plate are entirely in direct contact with each other. In such a configuration, the temperature detecting means is brought into contact with the lower surface of the insulating plate on which the cooking plate is placed, and detects the temperature of the bottom surface of the cooking plate through the heat transfer of the insulating plate. Since the cooking dish starts to rise at the same time as the induction heating coil is activated, the detected temperature of the bottom surface of the cooking dish is a temperature that is different from the actual temperature of the cooking object (food) placed on the cooking dish. ing. Therefore, the temperature detected by the temperature detecting means that is in contact with the lower surface of the insulating plate that is in contact with the entire bottom surface of the cooking dish is a temperature that is not directly related to the temperature of the food to be cooked. It was not information indicating the exact temperature.

  An object of the present invention is to provide a cooking device including a highly reliable grill cooking device that can improve temperature detection performance for a cooking object, enhance cooking performance, and perform automatic temperature control.

According to one aspect of the heating cooker of the present invention,
A cooking dish on which a cooking object is placed;
A cooking cabinet for storing the cooking plate;
A grill top plate provided on the bottom surface of the cooking chamber;
A grill heating coil disposed below the grill top plate and having a substantially circular shape in plan view;
A ferrite disposed below the grill heating coil and focusing the magnetic flux of the grill heating coil;
In a heating cooker provided with a temperature detection means disposed immediately below the grill top plate, the region on which the cooking object in the cooking pan is placed has a concavo-convex shape having a crest and a trough,
Provide a heating part formed of a material that generates heat by induction heating on the back surface of the trough of the cooking dish,
In a state where the cooking dish is stored in the cooking chamber, the position of the apex of the mountain portion where the heat generating portion is not disposed and the position of the temperature detecting means are opposed to each other in the vertical direction and overlap in plan view. The configuration is arranged as described above.

  According to the present invention, it is possible to provide a heating cooker including a highly reliable grill cooker that has high temperature detection performance for a cooking target, has high cooking performance, and can perform automatic temperature control.

The perspective view which shows the heating cooker of Embodiment 1 which concerns on this invention. The perspective view which shows the state which pulled out the door of the grill cooker in the heating cooker of Embodiment 1. FIG. The longitudinal cross-sectional view which shows the internal structure of the heating cooker of Embodiment 1. FIG. The disassembled perspective view which shows the internal structure of the grill cooker in the heating cooker of Embodiment 1. FIG. The disassembled perspective view which shows the internal structure of the grill cooker in the heating cooker of Embodiment 1. FIG. The reverse view which shows the lower surface of the grill cooker in the heating cooker of Embodiment 1. The top view which shows the one part internal structure of the grill cooker in the heating cooker of Embodiment 1. FIG. The longitudinal cross-sectional view which expanded and showed a part of grill cooker in the heating cooker of Embodiment 1. FIG. The cross-sectional view which expanded and showed a part of grill cooker in the heating cooker of Embodiment 1.

The heating cooker according to the first aspect of the present invention comprises:
According to one aspect of the heating cooker of the present invention,
A cooking dish on which a cooking object is placed;
A cooking cabinet for storing the cooking plate;
A grill top plate provided on the bottom surface of the cooking chamber;
A grill heating coil disposed below the grill top plate and having a substantially circular shape in plan view;
A ferrite disposed below the grill heating coil and focusing the magnetic flux of the grill heating coil;
In a heating cooker provided with a temperature detection means disposed immediately below the grill top plate, the region on which the cooking object in the cooking pan is placed has a concavo-convex shape having a crest and a trough,
Provide a heating part formed of a material that generates heat by induction heating on the back surface of the trough of the cooking dish,
In a state where the cooking dish is stored in the cooking chamber, the position of the apex of the mountain portion where the heat generating portion is not disposed and the position of the temperature detecting means are opposed to each other in the vertical direction and overlap in plan view. The configuration is arranged as described above.

  The heating cooker according to the first aspect of the present invention configured as described above has high temperature detection performance for a cooking target, has high cooking performance, and can perform automatic temperature control with high accuracy.

The heating cooker of the 2nd aspect which concerns on this invention is a state in which the recessed part was formed in the back surface of the peak part of the said cooking dish in the said 1st aspect, and the said cooking dish was accommodated in the said cooking chamber. in has a structure in which the deepest position of the concave portion is arranged such that the temperature detection target area of said temperature detecting means. In the heating cooker according to the second aspect of the present invention configured as described above, the temperature detection means can accurately detect the temperature of the cooking object placed on the cooking pan.

  The heating cooker of the 3rd aspect which concerns on this invention is comprised so that the said temperature detection means and the said ferrite may not overlap in planar view in the said 1st aspect or 2nd aspect. In the heating cooker according to the third aspect of the present invention configured as described above, the temperature detecting means can reduce the influence of the magnetic flux focusing of the ferrite, and can accurately detect the temperature of the object to be cooked. It becomes.

The cooking device according to the fourth aspect of the present invention is the cooking device according to any one of the first to third aspects, wherein the lower surface of the cooking dish stored in the cooking chamber is the cooking chamber. A predetermined space is arranged from the upper surface of the grill top plate constituting the bottom surface. In the heating cooker according to the fourth aspect of the present invention configured as described above, the temperature detection unit is suppressed from being affected by a sudden temperature change from the heating portion, and the temperature of the cooking target is accurately determined. High detection is possible.

  In the cooking device of the fifth aspect according to the present invention, the grill heating coil has a double substantially circular shape in any of the first to fourth aspects, and the grill heating In the region of the coil between the inner grill heating coil and the outer grill heating coil, the temperature detecting means is provided on each of both sides in the minor axis direction with the center of the grill heating coil in between. In the heating cooker according to the fifth aspect of the present invention configured as described above, it is possible to detect various states of the cooking object with high accuracy based on the temperature change detected by the temperature detecting means.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a built-in heating cooker as an embodiment according to the present invention will be described with reference to the accompanying drawings. The heating cooker of the present invention is not limited to the configuration of the heating cooker described in the following embodiment, but is a heating cooker provided with a grill cooker or a single grill cooker (in the present invention). Can be applied to a single grill cooker as well as a heating cooker), and can be applied to various heating devices configured based on the technical idea equivalent to the technical idea described in the following embodiments. Is possible.

(Embodiment 1)
FIG. 1 is a perspective view of the cooking device 10 according to the first embodiment of the present invention as viewed from above. In the first embodiment, the built-in heating cooker 10 incorporated in the kitchen will be described, but the present invention can also be applied to a heating cooker including a grill cooker such as a stationary heating cooker. is there. FIG. 2 shows a state in which the door of the grill cooker is pulled out in the heating cooker 10 according to the first embodiment.

  1 and 2, a heating cooker 10 according to Embodiment 1 has a top plate 1 for placing an object to be heated such as a pan or a frying pan, and a housing 2 that constitutes the appearance of the main body. ing. The housing 2 constituting the appearance of the main body is configured such that both side surfaces and the back surface thereof are disposed, for example, inside a kitchen to be incorporated, and only the front surface of the housing 2 is exposed on the outer surface of the kitchen. In FIG. 1, the symbol F is the front side of the cooking device 10, and the symbol R is the back side of the cooking device 10.

  The top plate 1 of the first embodiment has two induction heating regions IH on the front side (F) and one heating region RH on the back side (R). An induction heating coil unit is disposed immediately below the induction heating region IH of the top plate 1, and a heater unit using a sheathed heater that is a resistance heating element is disposed immediately below the heating region RH. Further, an exhaust port 1a is provided on the back side of the top plate 1 and is taken in from an intake port formed on the front side of the case 2 by a fan (not shown) provided in the case 2. After the outside air cools each unit inside the housing, it is exhausted from the exhaust port 1a.

On the front side (F) of the top plate 1 is formed an operation area 1b for controlling the heating operation of an induction heating coil unit , a heater unit, a grill unit which is a grill cooker described later, and the like. An operation unit such as a capacitance switch is provided immediately below 1b.

  As shown in FIG. 1, the heating cooker 10 of Embodiment 1 includes a grill unit 3 that is a drawer-type grill cooker. In the heating cooker 10 of Embodiment 1, the grill unit 3 is arrange | positioned at the left side surface side, and the control unit for controlling each unit is arrange | positioned at the right side surface side.

  The grill unit 3, which is a grill cooker, has a door 4 that constitutes a front-side appearance surface of the heating cooker 10, and the front opening of the cooking chamber 5 formed inside the housing 2 is opened and closed by the movement of the door 4. It is the composition which is done. A rail 4 a (see FIG. 2) extending inside the cooking chamber 5 is provided on the back side of the door 4, and the door 4 is drawn forward along the internal space of the cooking chamber 5 from the front opening of the cooking chamber 5. Thus, it is comprised so that translation is possible.

  A grill plate 6 serving as a cooking dish is disposed on the back side of the door 4. The grill plate 6 is disposed at a predetermined position by engaging with a hook formed on the back surface of the door 4. By the operation of pulling out the door 4, the door 4 is guided by the rail 4 a and moves back and forth, and the grill plate 6 is pulled out from the cooking cabinet 5 together with the door 4 or stored in the cooking cabinet 5. A handle 4b is provided on the front upper portion of the door 4 so that the user can easily open and close the door 4 with the handle 4b.

  FIG. 3 is a longitudinal sectional view showing the internal configuration of the heating cooker 10 including the grill unit 3. FIG. 3 is a longitudinal sectional view taken along a line extending in the front-rear direction of the grill unit 3 in the heating cooker 10. FIG. 3 shows a state where the grill plate 6 is housed inside the cooking cabinet 5.

  As with the other units, the grill unit 3 is unitized (integrated configuration) so that it can be easily assembled into the housing 2 of the heating cooker 10 during assembly.

  As shown in FIG. 3, in the grill unit 3 inside the heating cooker 10, a heater 8, which is a sheathed heater, is provided in the upper portion of the cooking chamber 5, and the heater 8 is placed on the grill plate 6. The object is heated from above by heat radiation and heat convection. The grill plate 6 in the cooking chamber 5 is disposed on a grill top plate (hereinafter, abbreviated as “grill TP”) 9 constituting the bottom surface of the cooking chamber 5 with a predetermined space (gap). That is, the front side of the grill plate 6 is disposed with a predetermined height from the surface of the grill TP9 by engaging with a hook (not shown) which is an engaging means provided on the door 4. On the other hand, leg portions 15 (see FIG. 6) projecting downward are provided on the rear rear surface of the grill plate 6, and the grill plate 6 has a predetermined height from the surface of the grill TP 9 on the rear side of the grill plate 6. It is the structure arranged.

  In the grill unit 3 which is the grill cooker according to the first embodiment, the door 4 is pulled out to the front side (F), and the leg portion 15 of the grill plate 6 engaged with the hook on the back side of the door 4 is attached to the cooking chamber 5. It is the structure which slides on the internal grill TP9. When the grill plate 6 moves on the grill TP9, only the leg portions 15 provided on the rear rear surface of the grill plate 6 are in contact with the grill TP9. Therefore, the entire grill plate 6 has a predetermined space (from the grill TP9). While maintaining a state having a gap), it is pulled out or stowed.

  The grill TP9 is formed of a material having high heat resistance and high electrical insulation similar to that of the top plate 1 constituting the upper surface of the heating cooker, and is formed of, for example, crystallized ceramic.

  FIG. 4 is an exploded perspective view showing the internal configuration of the grill unit 3 in the heating cooker 10 of the first embodiment. As shown in FIG. 4, in the grill unit 3, a plurality of rod-shaped heaters 8 are extended from the upper part in the front-rear direction of the cooking device 10. The grill plate 6, which is a cooking dish stored in the cooking chamber 5, is arranged so as to be efficiently thermally radiated by the upper heater 8.

  In the region where the cooking object is placed on the grill plate 6, the crest M and the trough V extend in a straight line in a direction orthogonal to the front-rear direction of the cooking device 10, that is, in a direction orthogonal to the pull-out direction. Is formed. In the grill plate 6, a region where the peak portion M and the valley portion V are formed is a cooking heating region. Therefore, the cooking object placed on the grill plate 6 is supported at the apex of the peak M in the cooking heating area. The cooking heating area of grill plate 6 in the first embodiment is configured in a rectangular shape with a long pull-out direction.

  An induction heating coil for grill (hereinafter abbreviated as “grill heating coil”) 11 is provided below the grill TP9 that constitutes the bottom surface of the cooking chamber 5 and on which the grill plate 6 is placed. The grill heating coil 11 of the first embodiment is formed in a substantially circular shape in plan view, and is composed of two grill coil portions 11a and 11b in which one grill heating coil 11 is arranged concentrically on the inner side and the outer side. It is configured. In the first embodiment, an example in which the grill heating coil 11 is formed in an elliptical shape in order to improve the heat distribution will be described. However, the present invention is not limited to this configuration. In addition, a substantially circular shape such as a circular shape or an oval shape is included.

  In the first embodiment, a configuration example in which one grill heating coil 11 is driven by one inverter circuit will be described. However, two grill coil portions 11a and 11b are connected to different inverter circuits, and each grill coil is connected. It is also possible to configure so as to selectively control the units 11a and 11b.

Below the grill heating coil 11, a plurality of ferrites 12 having a high magnetic flux focusing effect are arranged at predetermined positions so as to efficiently focus the magnetic flux corresponding to the shape of the elliptical grill heating coil 11. . Further, a shield plate 13 is provided under the ferrite 12 to prevent leakage of magnetic flux downward from the ferrite 12 and to arrange the ferrite 12 and temperature detecting means 14 described later at predetermined positions.

  In the grill unit 3 that is the grill cooker according to the first embodiment, the temperature detection means 14 is arranged at a position where the influence of the magnetic flux focusing by the ferrite 12 is less. As the temperature detection means 14, for example, a thermistor is used. The arrangement position of the temperature detecting means 14 in the first embodiment is provided in a region between the inner grill coil portion 11a and the outer grill coil portion 11b, and is hardly affected by the magnetic flux focusing by the ferrite 12. Position. Moreover, in Embodiment 1, the temperature detection means 14 is arrange | positioned in the predetermined position with respect to the position of the grill plate 6 accommodated in the inside of the cooking chamber 5, The detail is mentioned later. In the first embodiment, an example in which a thermistor is used as the temperature detection unit 14 will be described. However, an optical sensor such as an infrared temperature sensor may be used.

  FIG. 5 is an exploded perspective view showing the internal configuration of the grill unit 3 in the heating cooker 10 of the first embodiment, similar to FIG. 4 described above, and shows that the grill plate 6 is composed of two elements. Show.

  As shown in FIG. 5, the grill plate 6 includes a grill plate body 6a and a heat generating portion 6b fixed to the back surface thereof. In the grill plate 6, a plate-like heat generating portion 6b is joined and integrated on the back surface of the grill plate main body 6a by, for example, fixing means such as fitting. The grill plate body 6a is made of a light metal having good thermal conductivity such as aluminum. On the other hand, the heat generating portion 6b is formed of a metal that can be efficiently induction-heated, such as iron or magnetic stainless steel. As the heat generating portion 6b, magnetic stainless steel is preferable in consideration of rust prevention, but it is also possible to use a metal that is more efficiently induction-heated such as iron by coating the surface with a rust prevention treatment. The heat generating portion 6b has a plurality of elongated openings in accordance with the shapes of the ridges M and valleys V formed on the surface of the grill plate body 6a.

  FIG. 6 is a diagram showing the back surface (lower surface) of grill plate 6 in heating cooker 10 according to the first embodiment. On the back surface (lower surface) of the grill plate main body 6a in the grill plate 6, a heat generating portion 6b made of a metal that can be induction-heated by fitting is embedded. The heat generating portion 6b is embedded at least at a position corresponding to the valley portion V formed on the upper surface of the grill plate body 6a, and has an opening and is formed in a frame shape. At a position corresponding to the peak M formed on the upper surface of the grill plate main body 6a, the heat generating portion 6b is punched and an opening 7 (7a, 7b) is formed. In the heat generating portion 6b in the first embodiment, a first opening 7a extending substantially the entire length in the left-right direction of the cooking / heating region is formed in the central region (center portion in the front-rear direction) B (see FIG. 6) of the cooking / heating region. In the cooking area, the front area A and the rear area C (see FIG. 6), which are the areas before and after the central area B, have a second opening 7b having a length shorter than approximately half of the cooking heating area in the left-right direction. Is formed.

  Therefore, as is apparent from the shape of the heat generating portion 6b shown in FIG. 6, the back surface of the peak portion M of the grill plate body 6a in the first embodiment is in the central region (center portion in the front-rear direction) B of the cooking heating region. A dent H extending substantially the entire length in the left-right direction of the cooking heating area is formed. In addition, in the back surface of the peak part M in the front side area A and the rear side area C in the cooking heating area, a central portion in the left-right direction of the cooking heating area is formed flat, and a heat generating area (in the heating direction (in the drawing direction) extending in the drawing direction) The second heat generating area) 6bb is embedded. In the heat generating portion 6b in the first embodiment, a first heat generating region 6ba extending in the left-right direction is formed in the cooking heating region, and the front region A and the rear region C of the cooking heating region are in the drawing direction. An extended second heat generating region 6bb is formed. Accordingly, in the heat generating portion 6b, the first opening 7a in the central region B is formed to extend substantially the entire length in the left-right direction of the cooking heating region, and the second opening 7b in the front region A and the rear region C. Is divided into two parts by a second heat generating area 6bb extending in the pull-out direction, and has a length shorter than approximately half of the cooking and heating area in the left-right direction.

  FIG. 7 is a plan view showing an arrangement configuration of the grill heating coil 11, the plurality of ferrites 12, the temperature detecting means 14, and the like in the heating cooker 10 of the first embodiment. As shown in FIG. 7, two temperature detection means 14 such as a thermistor or an infrared ray are provided in a region (space) between the inner grill coil portion 11a and the outer grill coil portion 11b in the double elliptical heating coil 11. A temperature sensor is provided for each. The two temperature detection means 14 are disposed on both sides of the center D of the grill heating coil 11 and are disposed in the left and right regions between the inner grill coil portion 11a and the outer grill coil portion 11b. Has been. Here, the center of the grill heating coil 11 refers to the center position of the elliptical grill heating coil 11 in the short axis direction and the long axis direction.

  In the heating cooker 10 of the first embodiment, the region where the temperature detection means 14 is provided is a position where the influence of the magnetic flux focusing by the ferrite 12 is small and a position away from the ferrite 12. That is, the position of the temperature detection means 14 and the ferrite 12 is a position that does not overlap at least in plan view. In the shielding plate 13, the temperature detecting means 14 is mounted at a predetermined position so as to be separated from the grill heating coil 11 (11a, 11b) and the ferrite 12 by a predetermined distance, and from the grill heating coil 11 (11a, 11b). The effect of temperature has been reduced.

  The ferrite 12 used in the first embodiment has a rectangular parallelepiped shape having flat surfaces on the upper and lower sides. In such a rectangular parallelepiped ferrite 12, the magnetic flux concentrates on the short side. Therefore, as a region where the temperature detecting means 14 is arranged, a region facing the short side of the ferrite 12 is not preferable, and a position facing the long side of the ferrite 12 is preferable. In the first embodiment, as shown in FIG. 7, the temperature detecting means 14 is an area where the influence of the magnetic flux focusing by the ferrite 12 is small and does not face the short side of the ferrite 12 but faces the long side. The temperature detection means 14 is less affected by the magnetic flux from the ferrite 12.

  The position of the temperature detecting means 14 arranged as described above is relative to the position of the apex of the peak M formed on the grill plate 6 when the grill plate 6 is stored in a predetermined position inside the cooking chamber 5. Thus, they are arranged to face each other in the vertical direction (vertical direction). That is, the position of the temperature detecting means 14 at this time is opposed to the first opening 7 a portion of the heat generating portion 6 b on the back surface of the grill plate 6 and is opposed to the concave portion H on the back surface of the mountain portion M of the grill plate 6. It becomes the position to do. Therefore, in a state where the grill plate 6 serving as a cooking dish is stored in the cooking chamber 5, the peak portion (M) of the grill plate 6 and the position of the temperature detecting means 14 are overlapped in a plan view.

  As described above, when the grill plate 6 serving as a cooking dish is housed in the cooking cabinet 5, the mountain portion (M) where the heat generating portion 6 b is not disposed faces the temperature detection position of the temperature detection means 14. Are arranged as follows. That is, the temperature detection position of the temperature detection means 14 in the first embodiment does not overlap with the area of the heat generating part 6b that is induction-heated on the back surface of the grill plate 6 in a plan view, and the area of the opening in the heat generating part 6b They are arranged so as to overlap with each other. Therefore, the temperature detection unit 14 is suppressed from directly detecting the temperature of the heat generating portion 6b that is induction-heated via the grill TP9. In the case where an optical sensor such as an infrared temperature sensor is used as the temperature detection means, the area of the peak (M) of the grill plate 6 can be set as a temperature detection position that is a direct temperature detection target. It becomes possible to detect the temperature of the cooking object supported by the mountain (M) more accurately.

  When the grill plate 6 is stored in the cooking chamber 5, the center E of the cooking heating area coincides with the center D of the grill heating coil 11 when the grill plate 6 is stored in the cooking cabinet 5. It is configured. Therefore, when the grill plate 6 is stored in the cooking chamber 5, the temperature detection means 14 is located at a position facing the concave portion H on the back surface of the peak portion M of the grill plate 6. The temperature detection target region of the temperature detection means 14 is the deepest position in the concave portion H on the back surface of the peak portion M of the grill plate 6, and is the region of the peak portion M of the grill plate 6. As described above, the temperature detection means 14 in the first embodiment is configured to detect the temperature of the peak portion M of the grill plate 6, not the heat generating portion 6 b on the back surface of the grill plate 6. It becomes possible to detect the temperature of the cooking object.

  In the first embodiment, a plurality of rod-like ferrites 12 (first ferrite 12a and second ferrite 12b) are arranged so as to correspond to the shape of the elliptical grill heating coil 11, and the grill heating coil 11 is arranged. The magnetic flux focusing effect of the ferrite 12 is effectively utilized. Specifically, as shown in FIG. 7, the longitudinal direction of the first ferrite 12 a corresponds to the minor axis direction (left-right direction) of the grill heating coil 11 corresponding to the shape of the elliptical grill heating coil 11. The plurality of first ferrites 12a are arranged in two rows along the long axis direction (drawing direction) of the grill heating coil 11. As for the 2nd ferrite 12b, the 2nd ferrite 12b is arrange | positioned between the 1st ferrite 12a which each opposes in the both ends of the major axis direction (drawing direction) of the grill heating coil 11. FIG. The longitudinal direction of the second ferrite 12b is arranged to be the long axis direction (drawing direction) of the grill heating coil 11.

In the first embodiment, as described above, the two temperature detecting means 14 are the left and right regions of the grill heating coil 11 with the center D therebetween, and the inner grill coil portion 11a and the outer grill coil. It arrange | positions in the area | region of the both sides between the parts 11b, and is arrange | positioned so that the long side of the 1st ferrite 12a may be opposed. As shown in FIG. 7, in the region before and after the center D of the grill heating coil 11, the short sides of the left and right first ferrites 12 a face each other, and the short sides of the second ferrite 12 b also face each other. Therefore, this region is a region where the magnetic flux is concentrated, and is not a preferable region for arranging the temperature detecting means 14. In the first embodiment according to the present invention, the temperature detecting means 14 is arranged in a region where the influence of the magnetic flux by the ferrite 12 is less affected, and has a configuration capable of highly reliable temperature detection. .

As described above, in the heating cooker 10 according to the first embodiment, the top surface of the grill plate main body 6a of the grill plate 6 protrudes upward from the cooking chamber 5 and extends in the horizontal direction of the cooking chamber 5. A mountain M is formed. A concave portion H is formed on the back side of the peak portion M. A frame-shaped heat generating portion 6b (6ba, 6bb) is embedded in the back surface (lower surface) of the grill plate body 6a. The first heat generating area 6ba in the heat generating part 6b is embedded on the back surface side of the valley part V of the grill plate body 6a. The second heat generating area 6bb is embedded in the front area A and the rear area C of the grill plate body 6a along a center line extending in the pulling-out direction (front-rear direction). As described above, the second heat generating region 6bb embedded along the center line extending in the front-rear direction in the front region A and the rear region C has a plurality of ferrites 12 disposed below the grill heating coil 11. Are positions corresponding to the second ferrites 12b disposed so that the longitudinal direction thereof is the front-rear direction, and are disposed at positions overlapping each other in plan view.

  As described above, by arranging the plurality of ferrites 12 (12a, 12b) immediately below the elliptical grill heating coil 11, the magnetic flux generated from the grill heating coil 11 is transferred to the heat generating portion 6b on the back surface of the grill plate 6. On the other hand, the heat generating portion 6b is efficiently heated by effectively interlinking.

  In Embodiment 1, it arrange | positions so that the whole of several ferrite 12 (12a, 12b) may overlap most of the frame-shaped heat generating part 6b in the grill plate 6 accommodated in the cooking chamber 5 by planar view. Thus, the heat generating portion 6b is efficiently induction-heated. Note that the present invention is not limited to this configuration, and at least a portion of the heat generating portion 6b overlaps with the ferrite 12 in a plan view, whereby the heating efficiency can be increased by the magnetic flux focusing effect of the ferrite 12.

  In the first embodiment, the entire back surface of the grill plate 6 is configured such that no induction-heatable metal is embedded, but as described above, a plurality of ferrites 12 are provided corresponding to the shape of the grill heating coil 11. By effectively distributing and arranging, the grill plate 6 can be efficiently heated.

  In addition, in the heating cooker 10 of Embodiment 1 as mentioned above, although the built-in type cooker is dropped and integrated in opening parts, such as the upper surface of a kitchen, it mounts on upper surfaces, such as a sink and a table. Even a stationary type installed on a table or a table type can be applied to a grill cooker having the above-described configuration.

  Hereinafter, the positional relationship between the temperature detection means 14 in Embodiment 1 and the peak M of the grill plate 6 housed in the cooking cabinet 5 will be described in detail. FIG. 8 is an enlarged longitudinal sectional view (cross-sectional view in the front-rear direction) showing the vicinity of the position where the temperature detecting means 14 is provided in the grill unit 3. FIG. 9 is an enlarged horizontal cross-sectional view (cross-sectional view in the left-right direction) showing the vicinity of the position where the two temperature detection means 14 are provided in the grill unit 3. In FIG. 9, two temperature detection means 14 are short-axisd with the center of the grill heating coil 11 in the region between the inner grill coil portion 11a and the outer grill coil portion 11b of the grill heating coil 11. It is shown that each is provided on both sides of the direction. Note that the center of the grill heating coil 11 refers to the center position of the elliptical grill heating coil 11 in the short axis direction and the long axis direction.

  As shown in FIG. 8 and FIG. 9, the grill plate 6 housed in the cooking cabinet 5 is disposed on the grill TP <b> 9 that constitutes the bottom surface of the cooking cabinet 5, and the back surface of the grill plate 6 is the top surface of the grill TP <b> 9. Between these, a slight gap (for example, about 2.0 mm) is arranged. In this way, since the entire back surface of the grill plate 6 is not in contact with the grill TP9, the heating portion 6b on the back surface of the grill plate 6 heated to a high temperature by induction heating by the grill heating coil 11 is directly connected to the grill TP9. Heat transfer is suppressed. Therefore, even if the temperature detecting means 14 is configured to detect the temperature by contacting the grill TP9 using, for example, a thermistor, the rapid temperature change of the heat generating portion 6b is not directly detected.

  As described above, the temperature detection means 14 is provided at a position facing the concave portion H formed on the back side of the peak portion M in the grill plate 6 housed in the cooking chamber 5. That is, the sensor position of the temperature detecting means 14 is opposed to the apex position (the deepest position of the concave portion H) of the peak portion M of the grill plate 6 and overlaps each other in plan view.

  In the first embodiment, the sensor position of the temperature detecting means 14 and the apex position of the peak M of the grill plate 6 are configured to overlap in plan view, but the present invention is limited to this configuration. is not. In the present invention, the temperature detection target point by the temperature detection means 14 may be the apex of the peak M of the grill plate 6 (the deepest point of the recess H), and the position of the temperature detection means 14 is not limited.

  In the first embodiment, for example, when a thermistor is used, the temperature detecting means 14 is provided in contact with the back surface of the grill TP9 and is disposed at a position close to the peak M of the grill plate 6. The temperature detecting means 14 is configured to detect the temperature state of the peak portion M of the grill plate 6 via the grill TP9. By detecting the temperature state of the peak portion M, it is possible to detect the temperature of the cooking object supported at the apex of the peak portion M of the grill plate 6.

  As shown in FIG. 8, the temperature detecting means 14 in the first embodiment is not arranged directly under the heat generating portion 6b embedded in the back surface of the grill plate 6, and removes the heat generating portion 6b from the temperature detection target. Yes. For this reason, in the temperature detection means 14 in Embodiment 1, it is the structure which does not detect the rapid temperature change at the time of starting of the heat generating part 6b, for example. In particular, in the first embodiment, since an air layer (gap) is formed between the back surface of the grill plate 6 and the top surface of the grill TP9, the grill TP9 is not in direct contact with the heat generating portion 6b and generates heat. The temperature increase of the part 6b does not directly increase the temperature of the grill TP9. Therefore, in the first embodiment, even if the thermistor is used as the temperature detecting means 14 and the thermistor is brought into contact with the back surface of the grill TP9 to detect the temperature of the grill TP9, the temperature of the heat generating portion 6b is directly set. It is not a configuration to detect. In the configuration of the first embodiment, the sensor position of the temperature detecting means 14 is disposed immediately below the apex of the peak portion M of the grill plate 6 and substantially detects the temperature state of the peak portion M of the grill plate 6. It is a configuration. In the first embodiment, the thermistor is used as an example of the temperature detection unit 14, but the apex of the peak M of the grill plate 6 using an infrared temperature sensor that can further specify the temperature detection target area. The temperature may be detected.

  Since the temperature detection means 14 in the first embodiment is not provided in the vicinity of the grill heating coil 11 that generates heat during driving, it is less affected by the heat generated by the grill heating coil 11. Moreover, since the temperature detection means 14 in Embodiment 1 is provided in the position distant from the ferrite 12, it is suppressed that the influence of the magnetic flux which the ferrite 12 converged is received. Therefore, in the temperature detection means 14 in the first embodiment, the ambient temperature does not become high, and the temperature detection means 14 is less affected by the magnetic flux due to the ferrite 12, so that highly accurate temperature detection is possible.

In the grill cooker of the heating cooker according to the first embodiment, the temperature state of the cooking object placed on the grill plate 6 is detected based on the temperature information detected by the temperature detection means 14 as described above. It is. Moreover, the time-dependent temperature information detected by the temperature detection means 14 is managed in the control unit of the heating cooker, and a temporal transition from the time of starting is stored. For example, when a sudden rise temperature is detected at the rise temperature from the time of startup, the grill cooker has a configuration different from that of the cooking plate having a suitable grill plate 6 or a similar back surface configuration (configuration of the heat generating portion 6b). Assuming that an abnormal object such as a container is placed on the grill plate 6, the heating operation of the grill cooker is stopped.

  Moreover, since it has two temperature sensors as the temperature detection means 14, and it is provided in the both sides with the center of the grill heating coil 11, it is a cooking object based on the temperature information from two temperature sensors. However, when the temperature information from the two temperature sensors is significantly different and is not appropriate as a heating target in the grill cooker and the cooking target is too small, the heating operation of the grill cooker is stopped.

  In the grill cooker of the heating cooker according to the first embodiment configured as described above, the temperature detection means 14 is directly below the grill TP9 arranged with a predetermined distance (air layer) from the back surface of the grill plate 6. Therefore, the ambient temperature of the temperature detecting means 14 is lower than the temperature of the grill TP9, and the temperature can be detected with high accuracy.

In the grill cooker of the heating cooker according to the first embodiment, the heat generating portion 6b that is induction-heated at a predetermined position rather than the entire back surface of the grill plate 6 is disposed, and the position shifted from directly below the heat generating portion 6b. Is provided with temperature detecting means 14. Therefore, the temperature detection means 14 does not directly detect the temperature of the heat generating part 6b that is deviated from the cooking object and rapidly increases in temperature, and detects the cooking object placed on the grill plate 6 with higher accuracy. It becomes possible.

In the grill cooker of the heating cooker according to the first embodiment, the corrugated irregularities are formed in the cooking heating area of the grill plate 6 to form the peak M and the valley V, and the cooking target is supported by the peak V. It is a configuration. Further, the heat generating portion 6 b is embedded in the back surface of the valley portion V, and a recess H is formed on the back surface of the peak portion M that is a temperature detection target of the temperature detection means 14. In Embodiment 1, it arrange | positions so that the sensor position of the temperature detection means 14 and the peak part M of the grill plate 6 may overlap in planar view. For this reason, it is suppressed that the influence of the rapid temperature rise from the heat generating part 6b is directly received, and the temperature can be detected with high accuracy.

  In the grill cooker of the heating cooker according to the first embodiment, the temperature is detected in a region (space) between the inner grill coil portion 11a and the outer grill coil portion 11b in the double elliptical heating coil 11. Although the configuration provided with the means 14 has been described, the present invention is not limited to this configuration. For example, a temperature detection means is further provided at the center position of the heating coil 11 (position D in FIG. 6) for more accuracy. It is good also as a structure which aims at high temperature detection.

  The cooking device of the present invention can improve temperature detection performance for a cooking object, improve cooking performance, and perform automatic temperature control with high reliability.

  Moreover, the cooking device of Embodiment 1 which concerns on this invention has the cooking plate or cooking container other than a cooking plate (grill plate 6) and a cooking vessel corresponding to the said heating cooking device accommodated in a cooking chamber. When it is about to be heated, it has a highly safe cooking performance that reliably prohibits the start of induction heating operation for inappropriate cooking dishes or cooking containers. Furthermore, in the heating cooker according to the first embodiment, a metal heating element, which is a heavy object, is not provided on the entire back surface of the grill plate 6 that is a cooking dish, so that the weight of the grill plate 6 is reduced. And since the leg part 15 is provided so that the grill plate 6 can move smoothly on the grill TP9 which comprises the bottom face of a cooking chamber, it becomes a structure which is easy to handle for a user and has a high cooking function.

Furthermore, in the heating cooker according to the first embodiment of the present invention, in the grill plate 6 which is a cooking dish housed in the cooking chamber 5, the heat generating portion 6b is effective against the grill heating coil 11 and the ferrite 12. Therefore, the temperature distribution in the grill plate 6 becomes uniform, and the cooking object on the grill plate 6 can be heated uniformly.

  As described above, the present invention includes a highly reliable grill cooker that has high temperature detection performance for cooking objects, high cooking performance, and can perform automatic temperature control, and the grill cooker. A cooker can be provided.

  In addition, according to the present invention, there is provided a grill cooker having a highly safe cooking performance that reliably prohibits the start of induction heating operation for an inappropriate cooking plate or cooking container, and the grill cooker. Can do. Furthermore, according to the present invention, it is possible to provide a grill cooker that is easy to handle for the user and a heating cooker including the grill cooker.

  In the heating cooker including the grill cooker according to the present invention, since the cooking dish stored in the cooking chamber can be reduced in weight to perform uniform induction heating, it is easy to handle and reliable. High automatic temperature control can be performed, and it can be applied to various types such as built-in, stationary type and table type, and it becomes a highly versatile cooker.

1 Top plate 2 Housing 3 Grill unit (grill cooker)
4 door 5 cooking chamber 6 grill plate (cooking dish)
6a Grill plate body 6b Heat generating part 7 Opening of heat generating part 8 Heater 9 Grill top plate (grill TP)
DESCRIPTION OF SYMBOLS 10 Cooker 11 Grill heating coil 12 Ferrite 13 Shielding plate 14 Temperature detection means

Claims (5)

A cooking dish on which a cooking object is placed;
A cooking cabinet for storing the cooking plate;
A grill top plate provided on the bottom surface of the cooking chamber;
A grill heating coil disposed below the grill top plate and having a substantially circular shape in plan view;
A ferrite disposed below the grill heating coil and focusing the magnetic flux of the grill heating coil;
In a heating cooker provided with a temperature detection means disposed immediately below the grill top plate, the region on which the cooking object in the cooking pan is placed has a concavo-convex shape having a crest and a trough,
Provide a heating part formed of a material that generates heat by induction heating on the back surface of the trough of the cooking dish,
In a state where the cooking dish is stored in the cooking chamber, the position of the apex of the mountain portion where the heat generating portion is not disposed and the position of the temperature detecting means are opposed to each other in the vertical direction and overlap in plan view. The cooking device which has the composition arranged like this. Wherein a recess in the rear surface of the mountain portion of the cooking dish is formed, in a state in which the cooking dish is accommodated in the cooking chamber, positioned such deepest position of the concave portion becomes the temperature detection target area of said temperature detecting means The heating cooker of Claim 1 which has the structure by which it is carried out. Wherein said temperature detecting means ferrite, is configured so as not to overlap in a plan view, the heating cooker according to claim 1 or 2.   The lower surface of the cooking plate stored in the cooking chamber is configured to be arranged with a predetermined space from the upper surface of the grill top plate constituting the bottom surface of the cooking chamber. The cooking device according to claim 1. The grill heating coil has a double substantially circular shape, and in the region between the inner grill heating coil and the outer grill heating coil in the grill heating coil, the short axis direction with the center of the grill heating coil in between The heating cooker according to any one of claims 1 to 4 , wherein the temperature detecting means is provided on each of both sides of the heating device.

Images