JP2015062666A - Griddle cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a griddle cooker including a griddle perfect for being combined with a carbon heater as a heat source.SOLUTION: A griddle cooker 1 includes: a plate-like griddle 3; a carbon heater 4 for heating the griddle 3; and a reflection plate 5 that reflects infrared light towards the griddle side, the infrared light being radiated from the carbon heater 4 and heading for a direction separating from the griddle 3. The griddle 3 comprises two metal plates of a corrosion-resistant metal 10 constituting a griddle surface 13, and a heat-conductive metal plate 11 superposed on the back side of the corrosion-resistant metal 10. At least one part of the external surface of the heat-conductive metal plate 11 is subjected to heat absorption treatment 12.

Description

  The present invention relates to a griddle cooker, and in particular, a griddle equipped with a griddle (also called an iron plate, a hot plate, a cooking plate, etc.) for baking and cooking various foods such as fried noodles, okonomiyaki, hamburger, pancakes and the like. It relates to a cooker.

  Regarding this type of griddle cooker, Patent Document 1 describes a type in which a griddle made of a carbon plate is heated by a carbon heater. Patent Document 1 describes that a griddle may be constituted by a single copper plate instead of a carbon plate, and that a heat-absorbing paint may be applied to the back surface of the copper plate facing the carbon heater.

Utility Model Registration No. 3168214 JP-A-6-141979

  In general, griddles have a relatively large thickness (about 15 to 30 mm) in order to have a sufficiently large heat capacity to keep the temperature almost constant during cooking, to further reduce temperature unevenness in the cooking area, and to improve corrosion resistance against water washing. A single stainless steel plate is often used. A relatively thin cast iron plate or steel plate may be used for the griddle. When a thick stainless steel plate having a large heat capacity is used for the griddle, if heating is started when cooking becomes necessary, there is a drawback that it takes too much time for the griddle to reach the necessary high temperature. That is, the conventional griddle cooker has a drawback that the rise time is long. For this reason, for example, the cooker is always operated during business hours of the store, and as a result, useless energy is consumed.

  On the other hand, in order to overcome this drawback, it is conceivable to employ the griddle described in Patent Document 2. The griddle described in Patent Document 2 is composed of a stainless steel plate having a surface layer with excellent corrosion resistance, an intermediate layer having copper or a copper alloy having excellent heat conductivity, and a carbon steel plate or stainless steel plate having a bottom layer having magnetism. Electromagnetic three-layer structure griddle. That is, this electromagnetic three-layer structure griddle is composed of three metal plates. This is used in an electromagnetic cooker, that is, the bottom layer of the griddle is heated by an electromagnetic wave generated by the electromagnetic cooker, and the heat is transmitted to the cooking range by heat conduction of the griddle itself. Since copper is a non-magnetic material and does not generate heat in an electromagnetic cooker, a copper material is joined to the upper surface of a carbon steel plate or stainless steel plate, and the heat generated by the carbon steel plate or stainless steel plate is transmitted to the periphery by the copper material. Thereby, compared with the griddle comprised from the single stainless steel plate, it is excellent in thermal conductivity and corrosion resistance, and can raise the temperature of the whole griddle more uniformly in a comparatively short time.

  However, since the electromagnetic three-layer structure griddle described in Patent Document 2 is premised on use in an electromagnetic cooker, a carbon steel plate or a stainless steel plate as a bottom layer that generates heat electromagnetically is essential. For this reason, it is not necessarily optimal for a griddle cooker provided with a carbon heater as a heat source, and there remains room for improvement.

  Accordingly, an object of the present invention is to provide a griddle cooker including a griddle that is optimally combined with a carbon heater as a heat source.

According to one aspect of the invention,
A plate-shaped griddle for baking the food,
A carbon heater for heating the griddle;
A reflector that reflects infrared rays emitted from the carbon heater and traveling away from the griddle toward the griddle side;
With
The griddle is composed of two metal plates composed of a corrosion-resistant metal plate forming the griddle surface and a thermally conductive metal plate laminated on the back surface of the corrosion-resistant metal plate,
A griddle cooker is provided in which a heat absorption process is performed on at least a part of an outer surface of the heat conductive metal plate.

Preferably, the carbon heater has directivity and a plate-like filament, and the filament emits infrared rays in the normal direction from the front surface and the back surface thereof,
The filament and the reflector are arranged non-parallel to each other.

Preferably, a plurality of the carbon heaters are arranged in parallel,
A virtual infrared ray radiated from the back surface of the filament of the specific carbon heater toward the reflector and having the same width as that of the filament, after the regular reflection by the reflector, the specific carbon heater itself and the adjacent carbon heater The carbon heater and the reflection plate are arranged so as not to hit.

  Preferably, the reflecting plate is arranged in parallel to the griddle surface, and the filament is arranged non-parallel.

  Preferably, the filament is arranged in parallel to the griddle surface, and the reflector is arranged non-parallel.

  Preferably, the reflection plate is arranged so as to be away from the griddle toward the center of the griddle.

Preferably, a plurality of the carbon heaters are arranged in parallel,
The pitch between the heaters of the carbon heater is increased toward the center of the griddle.

Preferably, a plurality of the carbon heaters are arranged in parallel,
The reflecting plate has an uneven shape that is most spaced from the filament at the center of the width of the filament of each carbon heater.

Preferably, a plurality of the carbon heaters are arranged in parallel,
The reflection plate has an uneven shape that is closest to the filament at the center position of the width of the filament of each carbon heater.

  Preferably, the reflection plate is formed so that infrared rays radiated to the reflection plate are diffusely reflected.

  Preferably, the heat absorption treatment is performed on the back surface of the thermally conductive metal plate.

Preferably, the carbon heater has directivity and a plate-like filament, and the filament emits infrared rays in the normal direction from the front surface and the back surface thereof,
The thermally conductive metal plate has a heater groove recessed in the back surface thereof, the carbon heater is accommodated in the heater groove, and the front and back surfaces of the filament are directed to both side surfaces of the heater groove, respectively. It is done.

  Preferably, the heat absorption treatment is performed on at least one side surface of the heater groove.

  Preferably, the heat absorption process is performed on the bottom surface of the heater groove.

  Preferably, the heater groove has a depth equal to the thickness of the thermally conductive metal plate adjacent to the side of the heater groove.

  Preferably, the heater groove has a depth smaller than the thickness of the thermally conductive metal plate adjacent to the side of the heater groove.

  Preferably, on at least one side surface of the heater groove, the thermally conductive metal plate protrudes toward the back side with respect to the carbon heater.

  Preferably, the heater groove is formed in a tapered cross section.

  Preferably, the reflection plate is divided so as to be individually arranged facing the plurality of heater grooves.

  Preferably, the reflection plate closes the heater groove in which the carbon heater is accommodated.

  Preferably, the reflection plate is formed so that infrared rays radiated to the reflection plate are diffusely reflected.

  Preferably, the heat conductive metal plate has a slit, and the heating region of the griddle is divided by the slit.

  Preferably, the griddle cooker includes a temperature adjusting device for adjusting the temperature of the griddle for each heating region.

According to another aspect of the invention,
A griddle for baking the food,
A carbon heater for heating the griddle;
A reflector that reflects infrared rays emitted from the carbon heater and traveling away from the griddle toward the griddle side;
With
The griddle is composed of two metal plates composed of a corrosion-resistant metal plate forming the griddle surface and a thermally conductive metal plate laminated on the back surface of the corrosion-resistant metal plate,
The carbon heater has directivity and a plate-like filament, and the filament radiates infrared rays in the normal direction from the front surface and the back surface,
The thermally conductive metal plate has a heater groove recessed in the back surface thereof, the carbon heater is accommodated in the heater groove, and the front and back surfaces of the filament are directed to both side surfaces of the heater groove, respectively. A griddle cooker is provided that is characterized by

  ADVANTAGE OF THE INVENTION According to this invention, the outstanding effect that the griddle cooker provided with the griddle optimal to combine with the carbon heater as a heat source can be provided is exhibited.

It is a perspective view of the griddle cooking device concerning a 1st embodiment of the present invention. It is a perspective view of a griddle cooker, and shows the state where a griddle was removed. It is a top view of a griddle cooker. It is front sectional drawing of a griddle cooker. It is left side sectional drawing of a griddle cooker. It is an electric circuit diagram of a griddle cooker. It is a graph which shows the test result of the griddle of this embodiment, and a conventional product. It is a graph which shows the light distribution characteristic of a carbon heater. It is sectional drawing which shows the angle of the horizontal axis of FIG. It is front sectional drawing of 2nd Embodiment. It is front sectional drawing of 1st Embodiment as a comparative example. It is a front sectional view showing the example in which the reflected infrared rays hit the adjacent carbon heater as a comparative example of the third embodiment. As a comparative example of the third embodiment, it is a front cross-sectional view showing an example in which reflected infrared rays hit a radiant carbon heater. It is front sectional drawing of 3rd Embodiment. It is front sectional drawing for demonstrating the conditions which enable the optimal arrangement | positioning of a carbon heater and a reflecting plate. It is front sectional drawing of 4th Embodiment. It is front sectional drawing which shows the comparative example of 4th Embodiment. It is front sectional drawing for demonstrating the conditions for preventing reflected infrared rays from striking the radiation | emission carbon heater. It is front sectional drawing of 5th Embodiment. It is front sectional drawing of 6th Embodiment. It is front sectional drawing of 7th Embodiment. It is front sectional drawing of 8th Embodiment. It is front sectional drawing of 9th Embodiment. It is a top view of a 9th embodiment. It is left side surface sectional drawing of 9th Embodiment. It is front sectional drawing of the principal part of 9th Embodiment. It is front sectional drawing of the 1st modification of 9th Embodiment. It is front sectional drawing of the 2nd modification of 9th Embodiment. It is front sectional drawing of the 3rd modification of 9th Embodiment. It is front sectional drawing of the 4th modification of 9th Embodiment. It is front sectional drawing of the 5th modification of 9th Embodiment. It is front sectional drawing of the 6th modification of 9th Embodiment. It is front sectional drawing of the 7th modification of 9th Embodiment. It is front sectional drawing of the 8th modification of 9th Embodiment. It is front sectional drawing of the 9th modification of 9th Embodiment. It is front sectional drawing of the 10th modification of 9th Embodiment. It is front sectional drawing of the 11th modification of 9th Embodiment. It is front sectional drawing of the 12th modification of 9th Embodiment. It is front sectional drawing of 10th Embodiment. It is a top view of 10th Embodiment. It is front sectional drawing of the 1st modification of 10th Embodiment. It is front sectional drawing of the 2nd modification of 10th Embodiment. It is front sectional drawing of the 3rd modification of 10th Embodiment. It is a top view of 11th Embodiment. (A), (b) is the partial cross-sectional schematic diagram of 11th Embodiment, (c) is a cross-sectional schematic diagram of the modification. It is a cross-sectional schematic diagram of the 1st modification of 11th Embodiment. It is a cross-sectional schematic diagram of the 2nd modification of 11th Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the terms `` upper '', `` lower '', `` left '', `` right '', `` front '', `` back '' used below are limited to the arrangement in the illustrated example for easy understanding, It should be noted that it does not necessarily mean the direction and orientation as they are used in actual usage conditions.

  In the present application, regarding the plate-like member, one surface and the other surface that are in a front-back relationship with each other and have a predetermined spread are referred to as “front surface” and “back surface”, respectively, and are exposed to the outside without specifying the location. The surfaces are collectively referred to as “outer surfaces”.

[First embodiment]
As shown in FIGS. 1 to 5, the griddle cooker 1 includes a cooker body 2 and a plate-shaped griddle 3 placed on the cooker body 2. The cooker body 2 is provided with a carbon heater 4 for heating the griddle 3 and a reflection plate 5. Hereinafter, for the sake of convenience, the front side in the paper thickness direction in the front view of FIG. 4 is “front”, the back side in the paper thickness direction is “rear”, the left side is “left”, the right side is “right”, the upper side is “up”, The lower side is “lower”. The left-right direction of the griddle cooker 1 is also referred to as the width direction, the front-rear direction is also referred to as the depth direction, and the up-down direction is also referred to as the height direction.

  The cooker body 2 is formed in a generally rectangular frame shape in a plan view as shown in FIG. 3, and defines a rectangular heating chamber 6 in a plan view inside the square frame. A quadrangular griddle 3 is horizontally and detachably mounted on the cooker body 2 in plan view so as to close the upper opening of the heating chamber 6. The griddle 3 is for baking an object to be cooked (not shown) placed on its upper surface, that is, the griddle surface 13, and is placed on the upper surface of the cooker body 2 adjacent to the outer periphery of the heating chamber 6. It has been. By removing the griddle 3 from the cooker body 2, the griddle 3 can be washed with water or the like. A plurality of positioning members 7 are provided on the upper surface of the cooker body 2 for positioning the griddle 3 with respect to the cooker body 2. In the case of the illustrated example, the positioning members 7 are provided on the left side, the right side, and the rear side of the cooker body 2.

  In particular, in the case of the present embodiment, the heating chamber 6 and the griddle 3 are square in plan view, and the griddle 3 is rotated by 90 ° around the vertical axis with respect to the cooker main body 2 so that the orientation of the griddle 3 or the griddle 3 The relative orientation with respect to the cooker body 2 can be changed and used. The orientation of the griddle 3 shown in the figure is forward, but other than this, it can be leftward, rightward, or backward. Thereby, the orientation of the griddle 3 can be freely changed according to the actual installation location and application, which is convenient. The positioning member 7 is detachably attached with a bolt or the like, and the position can be changed. The position of the positioning member 7 can be freely changed according to the orientation of the griddle 3.

  However, the shape of the cooker body 2, the heating chamber 6, and the griddle 3 in plan view may be any shape, and may be, for example, a rectangle, an ellipse, or a circle. Of the cooker body 2, the heating chamber 6, and the griddle 3, at least two planar shapes may be different from each other.

  As shown in FIG. 4, in the cooker body 2, a bottom plate 8 that closes the bottom of the heating chamber 6 is provided so as to separate a clearance from a mounting surface (not shown) on which the cooker body 2 is placed. . A reflector 5 is provided above the bottom plate 8 at a predetermined interval. The reflecting plate 5 also closes the bottom of the heating chamber 6 and extends over the entire bottom of the heating chamber 6. A heat insulating material 9 is laid between the reflecting plate 5 and the bottom plate 8. The reflecting plate 5 is for reflecting infrared rays or heat rays radiated or irradiated from the carbon heater 4 in a direction away from the griddle 3 toward the griddle 3 side.

  As shown in FIG. 4, the griddle 3 is composed of two metal plates or metal layers including a corrosion-resistant metal plate 10 forming the griddle surface 13 and a heat conductive metal plate 11 laminated on the back surface of the corrosion-resistant metal plate 10. Has been. In other words, the griddle 3 is made of a clad material formed by bonding a corrosion-resistant metal plate 10 and a heat conductive metal plate 11 together. The corrosion-resistant metal plate 10 is made of a metal having excellent corrosion resistance, and is made of stainless steel in this embodiment. The heat conductive metal plate 11 is formed from a metal having excellent heat conductivity. In the present embodiment, the heat conductive metal plate 11 is formed from copper or a copper alloy, or aluminum or an aluminum alloy. The corrosion-resistant metal plate 10 and the heat conductive metal plate 11 are bonded or bonded to each other, and are preferably explode from each other by an explosive bonding method from the viewpoint of thermal conductivity and bondability. Other sticking or joining methods are possible, for example, a rolling method, a diffusion joining method, a brazing method, or the like. The corrosion resistant metal plate 10 is made thinner than the heat conductive metal plate 11. For example, the thickness of the corrosion-resistant metal plate 10 is 2 mm, and the thickness of the heat conductive metal plate 11 is 10 mm, but these thicknesses can be changed as appropriate. The griddle surface 13 is flat and horizontal. This griddle surface 13 forms the reference plane of the griddle cooker 1.

  In addition, in the griddle 3, at least a part of the outer surface of the heat conductive metal plate 11 is subjected to heat absorption treatment. In the case of this embodiment, the heat absorption process is performed on the entire back surface 11d of the heat conductive metal plate 11, whereby the heat absorption process layer 12 is formed. The heat absorption treatment is a surface treatment for efficiently absorbing infrared rays, and the heat absorption treatment layer 12 formed thereby is made of a carbon steel plate or stainless steel plate having magnetism as described in Patent Document 2. It is essentially different from the bottom layer. The heat absorption treatment itself may be any surface treatment, and may be, for example, painting, coating, fine uneven processing, thermal spraying, or the like performed on the back surface 11d of the heat conductive metal plate 11. In particular, it is preferable to paint or coat a heat-resistant paint having a color (preferably black) that easily absorbs infrared rays.

  The left and right side edge portions and rear edge portions of the griddle 3 are provided with shielding plates 14 that protrude upward from the surface 13 of the griddle 3. The shielding plate 14 is formed in a U shape as a whole. The shielding plate 14 prevents oil and the like from splashing around during cooking, suppresses a decrease in the griddle surface temperature, and also functions as a windshield when used outdoors. Handles 15 for lifting the entire griddle 3 are provided on the left and right side portions of the shielding plate 14.

  The griddle 3 is provided with a temperature sensor 16 for detecting its temperature. The temperature sensor 16 is made of, for example, a thermocouple, and is embedded in a sensor hole 17 provided in the thermally conductive metal plate 11. The type, installation method, installation position, etc. of the temperature sensor 16 are arbitrary. A lead wire 18 extending from the temperature sensor 16 is connected to a wiring 20 inside the cooking device body 2 via a connector 19. The wiring 20 is connected to a power regulator 34 (see FIG. 6) described later provided inside the cooking device body 2. As a result, the temperature of the griddle 3 can be adjusted based on the griddle temperature detected by the temperature sensor 16. By releasing the connection of the connector 19, the griddle 3 can be removed from the cooker body 2.

  Note that the temperature sensor 16 may be removed from the griddle 3. For example, the temperature sensor 16 may be removably inserted into the sensor hole 17 so that the temperature sensor 16 can be removed from the sensor hole 17 when the griddle 3 is removed from the cooker body 2. In this case, the connector 19 may be omitted.

  Inside the heating chamber 6, a plurality of straight tubular carbon heaters 4 are arranged in parallel in the left-right direction and along the front-rear direction below the griddle 3 and above the reflector 5. These carbon heaters 4 are arranged at predetermined height positions, and are arranged at regular intervals in the vertical direction with respect to the griddle 3 and the reflecting plate 5. The carbon heater 4 includes a heating resistor or filament 21 made of high-purity carbon that extends in the longitudinal direction (front-rear direction), a tubular body 22 that accommodates the filament 21 and transmits infrared rays, and is provided at both longitudinal ends of the heater. Terminal portion 23. The tube body 22 is formed of a transparent quartz tube or glass tube having a circular cross section.

  The carbon heater 4 is arranged such that the longitudinal center axis C1 thereof is parallel to the front-rear direction of the cooking device 1. All the carbon heaters 4 are arranged such that their longitudinal central axes C1 are positioned in parallel in the same horizontal plane. Here, “in the same plane” is not limited to the case where the longitudinal central axes C1 of all the carbon heaters 4 are completely arranged in one plane, but the longitudinal central axis C1 of at least one carbon heater 4 is in the one plane. The case where it is slightly deviated from the plane is included.

  The arrangement method of the carbon heater 4 is not limited to the arrangement method described above, and various arrangement methods are possible. For example, a plurality of carbon heaters 4 may be arranged non-parallel. You may arrange | position at least 1 carbon heater 4 along the left-right direction. The height positions of the plurality of carbon heaters 4 may be different from each other. The interval between the carbon heaters 4 may be changed without being constant. The carbon heaters 4 may be arranged so that the longitudinal central axes C1 of the plurality of carbon heaters 4 are not in the same plane. The arrangement of the carbon heater 4 can be determined optimally in consideration of the thermal load on the carbon heater 4, the temperature distribution of the griddle 3, and the like.

  The carbon heater 4 has directivity. That is, the filament 21 is plate-shaped and emits infrared rays in the normal direction from the front surface 24 and the back surface 25 (see FIG. 11). As the carbon heater 4, for example, a pure tan heater (registered trademark) manufactured by Metro Electric Industry Co., Ltd. can be suitably used. Preferably, the filament 21 is bent in a meandering manner in the plane in which it resides.

  As shown in FIG. 4, all the carbon heaters 4 are arranged so that the filaments 21 are horizontal. All filaments 21 are therefore parallel to the griddle surface 13. Moreover, since the reflecting plate 5 is also arranged horizontally, the filament 21 is parallel to the reflecting plate 5. The surface 24 of the filament 21 is directed upward and is directed perpendicular to the griddle 3. Further, the back surface 25 of the filament 21 is directed downward and directed perpendicularly to the reflecting plate 5.

  As shown in FIG. 5, the cooker main body 2 has a heater support member 26 having a U-shaped cross-section with the lower part opened at the positions of both ends in the longitudinal direction of the carbon heater 4. The heater support member 26 extends along the left-right direction, and forms inner walls 6 </ b> A before and after the heating chamber 6. The heater support member 26 is provided with a plurality of slits 27 that are open at the top (also shown in FIG. 2), and the ends of the carbon heater 4 are inserted into the slits 27 from above. The end of the carbon heater 4 is placed on the bottom surface 27A of the slit 27, whereby the carbon heater 4 is supported at both ends. The bottom surface 27 </ b> A of the slit 27 has a semicircular shape that matches the outer shape of the carbon heater 4. Preferably, a heat insulating material (not shown) is interposed between the bottom surface 27A of the slit 27 and the carbon heater 4 so that the heat of the carbon heater 4 is not transferred to the heater support member 26 while avoiding direct contact between the two. Established. Such a heat insulating material may be provided on the inner surface of the slit 27. Although the slit 27 is opened above the carbon heater 4, a closing body or a heat insulating material for closing the opening may be added. Moreover, although the cavity inside the heater support member 26 is opened above the carbon heater 4, a closing body or a heat insulating material for closing the open portion may be added.

  An openable lid plate 28 is provided on the heater support member 26. The lid plate 28 is installed so as to span the heater support member 26 and the outer plate 2A of the cooker body 2 and to be placed on them. In order to fix the cover plate 28 so as to be openable, it is preferable to provide a fixing member (not shown) such as a screw. The cover plate 28 may be completely removed, or one edge portion may be hinged to the outer plate 2A and opened by a rotating operation. The griddle 3 is placed on the lid plate 28 as shown.

  According to this configuration, the carbon heater 4 can be removed by opening the cover plate 28 and pulling the carbon heater 4 upward through the slit 27. If any one of the carbon heaters 4 breaks down, it can be removed and repaired or exchanged.

  In addition, the structure of the cooker main body 2 and the support structure of the carbon heater 4 are not limited to the above-described structure, and can be changed. For example, the heater support member 26 may have a square cross section or a solid shape. The shape of the bottom surface 27A of the slit 27 does not necessarily match the outer shape of the carbon heater 4, and may be, for example, a square shape.

  FIG. 6 shows the configuration of the electrical system of the griddle cooker 1. The griddle cooker 1 is operated by being supplied with electric power from a power source (in this embodiment, a three-phase 200V AC power source) 31, and includes a main switch 35, a no-fuse breaker 32, a power regulator 33, and a temperature regulator. 34, the temperature sensor 16 described above, and a plurality of carbon heaters 4 are provided. The no-fuse breaker 32 is disposed between the main switch 35 and the power regulator 33. The power regulator 33 is supplied with power from the power source 31 and controls the power supplied to the carbon heater 4 in accordance with an instruction signal from the temperature regulator 34. The temperature controller 34 includes an input unit for the user to set the griddle temperature. The temperature controller 34 outputs an instruction signal corresponding to the difference between the set temperature set by the user and the actual griddle temperature detected by the temperature sensor 16. Send to controller 33. As a result, the power regulator 33 feedback-controls the power supplied to the carbon heater 4 so that the actual griddle temperature becomes equal to the set temperature. In the above configuration, the power regulator 33, the temperature regulator 34, and the temperature sensor 16 constitute a temperature regulation device for regulating the temperature of the griddle 3. The input portion of the temperature controller 34 includes operation members such as a dial, a lever, and a key, and the operation member and the main switch 35 are provided on the front surface of the cooker body 2 so that the user can operate (however, FIG. 1). , 2 not shown).

  In addition, various other forms are possible for the configuration of the electrical system. For example, the power supply 31 may be a single-phase 200V or 100V AC power supply or a DC power supply. The power regulator 33 and the temperature regulator 34 may be configured separately or integrally.

  Next, the effect of the griddle cooker 1 which concerns on this embodiment is demonstrated.

  The griddle 3 of the present embodiment is composed of two metal plates, which are a corrosion-resistant metal plate 10 and a heat conductive metal plate 11, and a heat absorption process is performed on the back surface of the heat conductive metal plate 11. There is no carbon steel plate or stainless steel plate as a bottom layer that generates heat electromagnetically, such as the electromagnetic three-layer structure griddle described in Patent Document 2. Therefore, the infrared rays from the carbon heater 4 can be directly received by the heat conductive metal plate 11 and can be optimized for the griddle cooker 1 including the carbon heater 4. Of course, since the heat absorption treatment layer 12 is provided on the back surface of the heat conductive metal plate 11, the heat transfer efficiency to the heat conductive metal plate 11 can be increased. In addition, in the electromagnetic three-layer structure griddle described in Patent Document 2, only the central portion of the carbon steel plate or stainless steel plate is partially heated by the electromagnetic generator of the electromagnetic cooker (that is, the area of the electromagnetic generator is carbon). In this embodiment, since the heat conductive metal plate 11 and thus the entire back surface of the griddle 3 are uniformly heated by the plurality of carbon heaters 4, the heat transfer efficiency can also be improved. Since there is no carbon steel plate or stainless steel plate, it is naturally advantageous in terms of cost.

  In the present embodiment, the griddle 3 is configured by combining a corrosion-resistant metal plate 10 made of a stainless steel plate and a heat-conductive metal plate 11 made of copper having excellent heat conductivity. For this reason, it has the following advantages compared with the conventional griddle made of a single stainless steel plate.

  (1) The thickness of the griddle can be reduced, and the heat capacity of the griddle can be reduced. For example, a product equivalent to a conventional product having a thickness of 25 mm can be realized with a thickness of 12 mm. The breakdown is 2 mm for the corrosion-resistant metal plate 10, 10 mm for the heat conductive metal plate 11, and the thickness of the heat absorption layer 12 is negligible. Therefore, the temperature increase time of the griddle can be shortened. Further, in combination with the high thermal conductivity of the heat conductive metal plate 11 and the high responsiveness of the carbon heater 4, the temperature of the griddle can be finely and accurately adjusted. The griddle can also be reduced in weight and easy to handle.

  In FIG. 7, the test result which compared the temperature increase rate of the griddle 3 of this embodiment and the conventional product is shown. The thicknesses of both were as described above, and the same carbon heater was used as the heat source. As shown in the figure, the conventional product took about 270 seconds from when the carbon heater was turned on until the griddle temperature reached the set temperature of 120 ° C., but the griddle 3 of this embodiment requires only about 140 seconds. In other words, it was found that the griddle 3 of this embodiment has an overwhelmingly high rate of temperature increase. Further, the amount of overshoot of the griddle temperature immediately after reaching the set temperature (difference between the griddle temperature and the set temperature) is also smaller in the griddle 3 of this embodiment, and the griddle temperature is converged to the set temperature after overshoot. The time is shorter in the griddle 3 of this embodiment. From this, it can be said that the griddle 3 of this embodiment is excellent in controllability compared with a conventional product. In addition, since the rise time of the griddle temperature is short in this embodiment, heating can be performed only when cooking is necessary, and heating can be stopped when cooking is not necessary, resulting in reduced power consumption. Can do.

  (2) The thermal conductivity of the entire griddle is high. For this reason, the temperature unevenness of the griddle surface 13 can be reduced and the temperature of the griddle surface 13 can be made uniform. Moreover, the temperature rise of the to-be-cooked object placed on the griddle surface 13 can be accelerated.

  In the electromagnetic three-layer structure griddle described in Patent Document 2, only the central part of the carbon steel plate or the stainless steel plate is heated by the electromagnetic generation unit, so the griddle temperature tends to be non-uniform. Also, if the griddle is made too thin, warping will occur that causes the center part of the griddle to rise during heating, and the distance between the carbon steel plate or stainless steel plate and the electromagnetic generator may increase due to this warpage, and efficiency may deteriorate. There is sex. This can be facilitated by the aforementioned griddle temperature non-uniformity. This may also limit the griddle material.

  However, in this embodiment, the griddle is formed as described above and the entire griddle is heated by the carbon heater, so that the griddle temperature can be made uniform. Further, since the increase in the distance between the griddle and the carbon heater is not as bad as the electromagnetic three-layer structure griddle disclosed in Patent Document 2, the warpage of the griddle during heating can be allowed to some extent, and the freedom of the griddle material Can be increased.

  In the present embodiment, the griddle cooker 1 is configured by combining the griddle 3 configured as described above, the carbon heater 4, and the reflection plate 5. For this reason, it has the following advantages.

  (1) The griddle 3 can be heated efficiently and power consumption can be reduced.

  (2) Generation | occurrence | production of useless calorie | heat_amount can be suppressed and heat dissipation to the cooking-cooker exterior can be suppressed. For this reason, it can suppress that work environment (especially in the case of a narrow space) becomes high temperature, and can reduce the burden on a cooking worker.

  (3) Since the thermal efficiency is good, the heat release after the carbon heater 4 is stopped can be performed quickly, and the griddle temperature can be lowered quickly.

  By the way, in the griddle cooker 1 described above, the infrared rays radiated from the surface 24 of the filament 21 (indicated by Lu in FIG. 11) reach the griddle 3 directly, but there is no problem, but the infrared rays radiated from the back surface 25 of the filament 21 (Indicated by Ld in FIG. 11) reaches the griddle 3 after being reflected by the reflector 5. For this reason, it is desirable to make the reflected infrared rays reach the griddle 3 as much as possible. Therefore, it is also preferable to employ other embodiments as described later.

  The reflector 5 is exposed to a relatively high temperature during operation of the cooker. The heat resistant temperature is preferably about 300 ° C. or higher. As the structure of the reflecting plate 5, any structure can be adopted. For example, a surface of a metal plate as a base material subjected to coating, coating, mirror treatment, etc. for infrared reflection can be adopted. Moreover, the thing of the structure which laminated | stacked in order the mirror surface layer which consists of aluminum or silver, and the protective coating layer which consists of quartz glass on the stainless steel base material surface as described in patent document 1 is employable.

  In addition, a reflector (for example, product number V95-210) in “VEGA series” of ALMECO can be used. This reflective material is obtained by subjecting the surface of a high-purity aluminum substrate to a glossy alumite treatment, and further subjecting it to a multilayer coating treatment (pvd: physical vacuum deposition treatment) for increased reflection. Its total reflectivity is 94% or more, which is higher than the total reflectivity (about 85%) of a normal glass mirror. Further, as a reflective material having a similar structure, there is “MIRO” manufactured by Allanod, which can also be used. In this method, high-purity aluminum is vacuum-deposited on the surface of an aluminum base material, and a transparent oxide film is further vapor-deposited to increase reflection treatment. Its total reflectance is 95% or more.

  FIG. 8 shows the light distribution characteristics of the carbon heater 4. As for the angle of the horizontal axis, as shown in FIG. 9, the normal direction with respect to the surface 24 of the filament 21 is set to 0 °, and the angle in the direction rotated clockwise from this is added, and the angle in the direction rotated counterclockwise is set. Negative. The vertical axis in FIG. 8 represents the energy intensity of infrared rays emitted from the surface 24 of the filament 21. The light distribution characteristics described here also apply to the back surface 25 of the filament 21.

  Here, the above-described Puretan heater (registered trademark) manufactured by Metro Electric Industry Co., Ltd. was used as the carbon heater 4. In FIG. 8, line a is the catalog data of Puretan heater (registered trademark), line b is the simulation result, line c is the result of averaging the positive side and the negative side of the angle for the catalog data of line a, and line d is The result of averaging the plus side and minus side of the angle for the simulation result of line b is shown respectively.

  As shown in FIG. 8, the energy intensity of infrared rays is substantially maximum when the angle is near 0 °, decreases as the angle moves away from 0 °, and is substantially symmetric with respect to the angular position of 0 °. As described above, the carbon heater 4 has directivity, and emits infrared rays in the normal direction from the surface 24 of the filament 21, but also emits infrared rays in directions other than the normal direction. However, in the following description, for convenience, it is assumed that infrared rays are emitted only in the normal direction. Note that this treatment is slightly different from the actual.

  Hereinafter, several embodiments in which the directivity specific to the carbon heater and the heat reflection characteristics of the reflector are optimally combined will be described. In addition, description is abbreviate | omitted about the part similar to the above-mentioned 1st Embodiment, and it keeps only attaching | subjecting the same code | symbol in a figure. Only the differences from the first embodiment will be mainly described below.

[Second Embodiment]
In the second embodiment, as shown in FIG. 10, the filament 21 and the reflector 5 are arranged non-parallel to each other (that is, not to be parallel), or the carbon heater 4 and the reflective plate are reflected so as to be so. A plate 5 is arranged. Specifically, the back surface 25 of the filament 21 that radiates infrared rays Ld toward the reflection plate 5 and the reflection surface 40 of the reflection plate 5 that reflects the infrared rays Ld radiated from the back surface 25 of the filament 21 are arranged in non-parallel. Has been. Around the longitudinal center axis C2 of the filament 21, the filament 21 is rotated by an angle θ from a horizontal position or a reference position as in the first embodiment. Since the longitudinal center axis C2 of the filament 21 coincides with the longitudinal center axis C1 of the carbon heater 4, the carbon heater 4 is actually attached by being rotated about the longitudinal center axis C1 by an angle θ. As a result, the filament 21 is tilted with respect to the horizontal reflector 5. The longitudinal center axis C2 of the filament 21 is located at the center of the width (full width) w of the filament 21.

  Here, since the griddle surface 13 is horizontal, the reflector 5 is arranged in parallel to the griddle surface 13, and the filament 21 is arranged non-parallel to the griddle surface 13.

  As described above, it is assumed that the infrared rays L (Lu, Ld) are emitted only in the normal direction of the filament 21 with the same width w as the filament 21 as shown in the figure. The infrared rays assumed in this way are referred to as virtual infrared rays, but in the following description, they are simply referred to as infrared rays for convenience.

  The effects of the second embodiment will be described in comparison with the first embodiment. In the first embodiment, as shown in FIG. 11, the filament 21 and the reflector 5 are arranged in parallel. Then, the infrared ray Ld having a width w emitted from the back surface 25 of the filament 21 strikes the reflector 5 with a width w from the vertical direction. Then, the width w of the region on the reflecting plate 5 where the infrared rays Ld hit is reduced, and heat is easily accumulated in the reflecting plate 5. Further, the infrared light reflected (particularly specularly reflected) by the reflecting plate 5 hits the carbon heater 4 itself, which is an infrared radiation source, and is blocked by this, so that it is difficult to reach the griddle 3. There is also a possibility that thermal energy reciprocates between the carbon heater 4 and the reflection plate 5. As a result, infrared thermal energy is consumed to heat the reflector 5 and cannot be used efficiently for heating the griddle 3.

  On the other hand, in the case of the second embodiment, as shown in FIG. 10, the infrared ray L having a width w emitted from the back surface 25 of the filament 21 strikes the reflector 5 with a width w / cos θ from an oblique direction. Then, the width of the region where the infrared ray Ld hits on the reflector 5 is larger than that in the first embodiment (w / cos θ> w), the heat generation density is lowered, and the amount of heat accumulated in the reflector 5 can be reduced. . Although not shown, the infrared rays reflected by the reflecting plate 5 can reach the griddle 3 without being hit as much as possible to the carbon heater 4 itself that is the radiation source. Therefore, more infrared thermal energy can be used for heating the griddle 3. In addition, the maximum temperature of the reflector 5 can also be lowered.

[Third embodiment]
As described above, it is preferable that the infrared light reflected by the reflecting plate 5 does not strike the radiating carbon heater 4. At the same time, it is preferable that the infrared rays reflected by the reflecting plate 5 do not strike the carbon heater 4 adjacent to the radiation direction of the infrared rays of the carbon heater 4 that is the radiation source.

  FIG. 12 shows an example in which the infrared ray Ld2 reflected by the reflecting plate 5 hits the carbon heater 4B adjacent to the radiating carbon heater 4A. In this case, a part of the infrared ray Ld2 emitted from the reflecting plate 5 with the width w / cos θ is blocked by the adjacent carbon heater 4B. Therefore, the amount of heat stored in the reflecting plate 5 is increased by the amount blocked, and the heating width of the griddle 3 is reduced.

  FIG. 13 shows an example in which the infrared ray Ld2 reflected by the reflecting plate 5 strikes the radiation source carbon heater 4A. Similarly, in this case, part of the infrared ray Ld2 radiated from the reflecting plate 5 with the width w / cos θ is blocked by the radiating carbon heater 4A, and the amount of heat stored in the reflecting plate 5 increases accordingly. The heating width of the griddle 3 is reduced.

  Therefore, in this embodiment, as shown in FIG. 14, the carbon heater 4 (4A, 4B) is used so that the infrared ray Ld2 reflected by the reflecting plate 5 does not strike the radiating carbon heater 4A to the adjacent carbon heater 4B. ) And the reflector 5 are arranged. This is called “optimum arrangement” for convenience. That is, virtual infrared rays having the same width w as the filament 21 radiated from the back surface 25 of the filament 21 of the specific carbon heater 4A to the reflective plate 5 are specularly reflected by the reflective plate 5 and the specific carbon heater 4A itself and its The carbon heater 4 (4A, 4B) and the reflection plate 5 are arranged so as not to hit the adjacent carbon heater 4B.

  Thereby, the infrared rays Ld2 radiated from the reflector 5 with the width w / cos θ strike the griddle 3 with the width w / cos θ without being blocked by the radiating carbon heater 4A or the adjacent carbon heater 4B. Therefore, while suppressing the increase in the heat storage amount in the reflecting plate 5, the heating width of the griddle 3 can be maximized to increase the efficiency.

  Here, the conditions for enabling the optimum arrangement as described above will be described with reference to FIG. FIG. 15 is a view similar to FIG. 14, and the infrared rays Ld2 after reflection by the reflecting plate 5 are caused by the radiation source carbon heater 4A (strictly, its tubular body 22) and the adjacent carbon heater 4B (strictly, its It is in contact with both the tube body 22). That is, the arrangement relationship in a limit state in which the infrared ray Ld2 does not hit both the carbon heaters 4A and 4B is shown. For example, if the position of the reflecting plate 5 is lowered more than this, the infrared rays Ld2 hit the adjacent carbon heater 4B as shown in FIG. 12, and if the position of the reflecting plate 5 is raised more than this, it is shown in FIG. As described above, the infrared ray Ld2 strikes the radiation source carbon heater 4A.

The distance in the height direction between the longitudinal center axis C2 of the filament 21 and the reflector 5 is h, the pitch between the carbon heaters 4A and 4B is p, and the diameter of the tube 22 is d. A right triangle with C2, B1, and B2 as vertices, where B2 is an intersection of a perpendicular drawn from the longitudinal central axis C2 to the reflector 5 and an extended line of the infrared ray Ld2 that is in contact with the radiation source carbon heater 4A at the contact B1 (Indicated by Δ (C2, B1, B2)) is as follows.
sin θ = (d / 2) / h1 (1)
h1 = d / (2 sin θ) (2)

Further, if the width end of the filament 21 farthest from the adjacent carbon heater 4B is B3, and the intersection of the infrared ray radiated from the width end B3 and the perpendicular is B4, the triangle is a right triangle Δ (C2, B3 , B4) is as follows.
sin θ = (w / 2) / h2 (3)
h2 = w / (2 sin θ) (4)

Assuming that the intersection point between the infrared rays radiated from the width end B3 and the reflecting plate 5 is B5, Δ (B5, B4, B2) is an isosceles triangle, and thus is as follows.
h3 = (h1-h2) / 2 (5)
h = h2 + h3
= H2 + (h1-h2) / 2
= (H1 + h2) / 2
= (D / (2 sin θ) + w / (2 sin θ)) / 2
= (D + w) / (4sinθ) (6)

On the other hand, if the intersection of the infrared ray radiated from the longitudinal central axis C2 and the reflector 5 is B6, and the intersection of the perpendicular of the reflector 5 passing through the intersection B6 and the horizontal line passing through the longitudinal central axis C2 is B7, Δ (B6 Since B7, C2) is a right triangle, it is as follows.
tan θ = (p / 4) / h (7)
p = 4h · tan θ
= 4 ((d + w) / (4sin θ)) · tan θ
= (D + w) / cos θ (8)

Therefore, from the equations (6) and (8), the condition for enabling the optimum arrangement is to satisfy the following equations (9) and (10) simultaneously.
h> (d + w) / (4 sin θ) (9)
p> (d + w) / cos θ (10)

  FIG. 12 shows an example when p <(d + w) / cos θ, and FIG. 13 shows an example when h <(d + w) / (4 sin θ). Incidentally, if d = 10 mm, w = 6 mm, and θ = 30 °, h = 8 mm according to equation (6), and p = 18.48 mm according to equation (8). Therefore, if h> 8 mm and p> 18.48 mm, the optimum arrangement can be realized. By disposing the carbon heater 4 (4A, 4B) and the reflecting plate 5 so as to satisfy the equations (9) and (10) at the same time, the infrared ray Ld2 emitted from the reflecting plate 5 is also emitted to the carbon heater 4A that is the emission source. It can be applied to the griddle 3 without being applied to the adjacent carbon heater 4B, and the heat transfer efficiency can be improved.

[Fourth embodiment]
As in the third embodiment, the fourth embodiment also relates to an optimal arrangement for preventing the infrared rays Ld2 reflected by the reflector 5 from being applied to the radiating carbon heater 4A and the adjacent carbon heater 4B. However, as shown in FIG. 16, in this embodiment, instead of inclining the filament 21 with respect to the horizontal, the reflector 5 is inclined with respect to the horizontal by an angle θ. The filament 21 is arranged horizontally, and the filament 21 and the reflector 5 are arranged non-parallel to each other. Further, the filament 21 is arranged in parallel to the griddle surface 13, and the reflecting plate 5 is arranged in non-parallel.

  FIG. 17 shows an example in which the filament 21 and the reflector 5 are arranged in parallel and horizontally as in FIG. As described above, the infrared ray Ld2 reflected by the reflecting plate 5 returns to the radiating carbon heater 4A, heat is accumulated in the reflecting plate 5, and heating efficiency and heat transfer efficiency deteriorate. .

  On the other hand, as shown in FIG. 16, according to the optimal arrangement of the present embodiment, the infrared ray Ld2 reflected by the reflecting plate 5 is not applied to the radiating carbon heater 4A or the adjacent carbon heater 4B. 5 can be suppressed, and heating efficiency and heat transfer efficiency can be increased.

  Here, conditions for preventing the infrared ray Ld2 reflected by the reflecting plate 5 from being applied to the radiation source carbon heater 4A will be described with reference to FIG. FIG. 18 shows a limit state where the reflected infrared ray Ld2 is in contact with the radiant carbon heater 4A (strictly, its tubular body 22). For example, if the position of the reflector 5 rises more than this, the infrared rays Ld2 will hit the radiation source carbon heater 4A.

The distance in the height direction between the longitudinal center axis C2 of the filament 21 and the reflecting plate 5 is h, and the diameter of the tube body 22 is d. The perpendicular line dropped from the longitudinal central axis C2 perpendicularly to the filament 21 and the infrared ray Ld2 (B11) radiated from the width end B11 of the filament 21 farthest from the adjacent carbon heater 4B (see FIG. 16) and reflected by the reflecting plate 5 ) At the point B12. The distance in the height direction between the longitudinal central axis C2 and the intersection B12 is h1. A contact point of the infrared ray Ld2 (B11) to the carbon heater 4A is B13. From Δ (C2, B12, B13) which is a right triangle, it is as follows.
sin2θ = (d / 2) / h1 (11)
h1 = d / (2sin2θ) (12)

The base point of the infrared ray Ld2 (B11) is B14. When a perpendicular is drawn from B14 to the perpendicular, the intersection of the two is B15. The distance in the height direction between B12 and B15 is h2. From Δ (B12, B14, B15) which is a right triangle, it is as follows.
tan2θ = (w / 2) / h2 (13)
h2 = w / (2tan2θ) (14)

Further, if the intersection of the perpendicular line perpendicular to the filament 21 from the longitudinal central axis C2 and the reflecting plate 5 is B16, and the distance in the height direction of B15 and B16 is h3, Δ (B14, B15, B16 is a right triangle. ) Is as follows.
tan θ = h3 / (w / 2) (15)
h3 = (w / 2) tan θ (16)

Since h is the sum of h1, h2, and h3, it is as follows from equations (12), (14), and (16).
h = h1 + h2 + h3
= D / (2sin2θ) + w / (2tan2θ) + (w / 2) tanθ
= (1/2) · (d / sin 2θ + w / tan 2θ + w · tan θ) (17)

Therefore, from the equation (17), the condition for preventing the reflected infrared ray Ld2 from being applied to the radiating carbon heater 4A is as follows.
h> (1/2) · (d / sin 2θ + w / tan 2θ + w · tan θ) (18)

  Incidentally, if d = 10 mm, w = 6 mm, and θ = 10 °, h = 23.39 mm according to the equation (17).

[Fifth Embodiment]
As shown in FIG. 19, also in the fifth embodiment, the filament 21 is disposed horizontally, and the reflector 5 is inclined with respect to the horizontal. The filament 21 and the reflecting plate 5 are arranged non-parallel to each other. Further, the filament 21 is arranged in parallel to the griddle surface 13, and the reflecting plate 5 is arranged in non-parallel. And the above optimal arrangement | positioning is made | formed.

  Further, the reflecting plate 5 is disposed so as to be separated from the griddle 3 toward the center of the griddle 3. Specifically, as shown in FIG. 19, when the width center of the portion of the griddle 3 that covers the heating chamber 6 is C3, the reflector 5 is positioned farthest away from the griddle 3 at the position of the width center C3. Thus, the reflecting plate 5 is inclined by an angle θ with respect to the horizontal, symmetrically about the width center C3. Thus, the reflecting plate 5 is generally formed in a concave shape or a valley shape in which the cross section in the width direction is recessed downward. The cross-section in the depth direction may also be a similar concave shape or valley shape.

  By configuring the reflector 5 in this way, the distance between the carbon heater 4 and the reflector 5 can be increased at the griddle 3 where the heat load is large or in the center of the heating chamber 6, and the temperature rise of the reflector 5 is suppressed. Heating efficiency can be increased.

  By the way, when the reflecting plate 5 is configured in this way, the distance in the height direction between the carbon heater 4 and the reflecting plate 5 changes according to the width direction distance from the width center C3. Then, according to the change in the distance in the height direction, the pitch between the carbon heaters 4 that can realize the optimum arrangement changes.

  Therefore, the pitch p between the carbon heaters 4 is increased toward the center of the griddle 3 (specifically, the center of the width) so that the optimal arrangement can be satisfied by all the carbon heaters 4. Specifically, for example, when a total of four carbon heaters 4 are provided, each having two width centers C3 as illustrated, the pitch p1 between the two carbon heaters 4 close to the width center C3 is: It is larger than the pitch p2 between the carbon heater 4 farther from the width center C3 and the carbon heater 4 closer to the width center C3. By carrying out like this, optimal arrangement | positioning can be implement | achieved with respect to all the carbon heaters 4, and heating efficiency can be improved.

[Sixth Embodiment]
As shown in FIG. 20, also in the sixth embodiment, the filament 21 is disposed horizontally, and the reflector 5 is inclined with respect to the horizontal. The filament 21 and the reflecting plate 5 are arranged non-parallel to each other. Further, the filament 21 is arranged in parallel to the griddle surface 13, and the reflecting plate 5 is arranged in non-parallel. And the above optimal arrangement | positioning is made | formed.

  In particular, the reflecting plate 5 has an uneven shape that is closest to the filament 21 at the position of the center C6 of the width w of the filament 21 of each carbon heater 4. Specifically, the reflecting plate 5 has a mountain-valley shape that is highest in the width direction at the position of the width center C6 of the filament 21 of each carbon heater 4 and lowest at a position of 1/2 pitch between the carbon heaters 4. It is said. Each inclined portion of the reflecting plate 5 is inclined by an angle θ with respect to the horizontal.

  According to this, the infrared rays Ld1 having a width w emitted from the filament 21 are divided into half widths as shown in the figure, and reflected in directions opposite to each other in the griddle width direction. The reflected infrared rays Ld2 reach the griddle 3 without hitting the adjacent carbon heaters 4 respectively. Thereby, heating efficiency can be improved like the said embodiment.

[Seventh embodiment]
As shown in FIG. 21, the seventh embodiment is the same as the sixth embodiment except that the relationship between the sixth embodiment and the mountain valley is reversed. That is, the reflecting plate 5 has an uneven shape that is farthest from the filament 21 at the position of the width center C6 of the filament 21 of each carbon heater 4. Specifically, the reflector 5 has a mountain-valley shape that is lowest in the width direction at the position of the width center C6 of the filament 21 of each carbon heater 4 and highest at a position of 1/2 pitch between the carbon heaters 4. It is said. Each inclined portion of the reflector 5 is inclined by an angle θ with respect to the horizontal.

  According to this, the infrared rays Ld1 having a width w emitted from the filament 21 are divided into half widths as shown in the figure, and reflected in directions opposite to each other in the griddle width direction. The reflected infrared rays Ld2 reach the griddle 3 without hitting the adjacent carbon heaters 4 respectively. Thereby, heating efficiency can be improved like the said embodiment.

  Further, as compared with the sixth embodiment, since the reflector 5 is further away from the carbon heater 4, the amount of heat stored in the reflector 5 can be reduced and the heating efficiency of the griddle 3 can be further increased.

[Eighth embodiment]
As shown in FIG. 22, in the eighth embodiment, the reflection plate 5 is formed so that the infrared rays Ld1 radiated to the reflection plate 5 are diffusely reflected. According to this, the amount of infrared rays Ld2 reflected toward the carbon heater 4A of the radiation source is reduced, the increase in the heat storage amount in the reflector 5 is suppressed, and the amount of infrared rays Ld2 reaching the griddle 3 is increased, Heating efficiency and heat transfer efficiency can be increased.

  In the illustrated example, the filament 21 and the reflector 5 are arranged in parallel to each other. However, the present embodiment can also be suitably applied when these are arranged non-parallel. Further, the present embodiment can be suitably applied even when the optimal arrangement as described above is performed or not.

  In the present embodiment, the surface of the reflecting plate 5, that is, the reflecting surface 40 is subjected to surface finishing for diffusely reflecting the infrared rays Ld1. This surface finish typically includes uneven processing for forming fine unevenness. The uneven surface thus formed can exhibit various patterns, for example, satin finish, stucco finish, hammer tone, embossed tone, and the like. In order to reduce the regular reflectance and increase the diffuse reflectance, the reflecting surface 40 is a fine uneven surface or semi-mirror surface rather than a mirror surface, and is a non-glossy surface rather than a glossy surface. The diffuse reflectance of the reflecting surface 40 is preferably 40% or more, more preferably 80% or more, and further preferably 90% or more.

  By the way, when infrared rays are diffusely reflected, infrared rays are reflected near the inner wall of the heating chamber 6, and the infrared rays hit the inner wall of the heating chamber 6 to heat it, and the heat of the reflected infrared rays. There is a risk that energy cannot be used effectively.

  Therefore, as indicated by phantom lines, it is preferable to bend the outer peripheral edge 5e of the reflector 5 located near the inner wall of the heating chamber 6 so that the surface thereof faces the center of the griddle. Thereby, while reducing the infrared rays which go to the inner wall of the heating chamber 6, the infrared rays can be more actively reflected toward the center of the griddle, and the infrared thermal energy can be used effectively.

  This configuration is considered to be effective for the reflector 5 other than the present embodiment, and can be applied to other than the present embodiment. As an example, the configuration of the reflector 5 when applied to the first embodiment is shown in phantom lines in FIGS.

[Ninth Embodiment]
Next, a ninth embodiment will be described. This ninth embodiment relates to the positional relationship between the griddle 3 and the carbon heater 4. As shown in FIGS. 23 to 25, the heater groove 41 is provided in the thermally conductive metal plate 11 of the griddle 3, and the heater groove 41 is carbonized. It is characterized in that the heater 4 is accommodated.

  That is, the heat conductive metal plate 11 is provided with a plurality of heater grooves 41 recessed on the back surface thereof. The heater grooves 41 are linear and parallel to each other and extend along the entire length of the thermally conductive metal plate 11 along the front-rear direction. In the illustrated example, four heater grooves 41 and four carbon heaters 4 are provided, but this number is arbitrary. A step 42 is provided in the cooker main body 2, and the griddle 3 is placed on the cooker main body 2 so as to fit into the step 42. This step portion 42 forms a positioning member for positioning the griddle 3, and the positioning member 7 described above is omitted. However, the installation method of the griddle 3 with respect to the cooking appliance main body 2 is arbitrary, and does not necessarily need to fit in the cooking appliance main body 2 or the step part 42. The carbon heater 4 is attached to the cooker body 2 as described above. However, the attachment method of the carbon heater 4 is also arbitrary, and the carbon heater 4 may be attached to the griddle 3.

  As shown also in FIG. 26, the carbon heater 4 is arranged so that the front surface 24 and the back surface 25 of the filament 21 are directed to both the left and right side surfaces 43 and 44 of the heater groove 41, respectively. In the illustrated example, the front surface 24 and the back surface 25 of the filament 21 are parallel to the left side surface 43 and the right side surface 44 of the heater groove 41, respectively. Thereby, in the heater groove | channel 41, the surface 24 and the back surface 25 of the filament 21 radiate | emit infrared rays L perpendicularly | vertically to the left side surface 43 and the right side surface 44 of the heater groove 41, respectively.

  In order to efficiently absorb the radiated infrared rays L, heat absorption processing is performed on at least one of the left side surface 43 and the right side surface 44 of the heater groove 41, preferably both as shown in the drawing, and the heat absorption processing layer 12 is formed. Provided. On the other hand, it is preferable not to provide the heat absorption treatment layer 12 on the back surface 11d of the heat conductive metal plate 11 as in the illustrated example. This is because when the heat absorption treatment layer 12 is provided, the emissivity increases, and more heat is radiated from the back surface 11d of the heat conductive metal plate 11.

  The heater groove 41 has a depth t2 equal to the thickness t1 of the heat conductive metal plate 11 adjacent to the side thereof. Thereby, the heater groove 41 does not leave the portion of the heat conductive metal plate 11 at the bottom, but exposes the corrosion-resistant metal plate 10 at the bottom. In other words, the bottom surface 45 of the heater groove 41 is formed by the corrosion-resistant metal plate 10. In the illustrated example, the heat absorption treatment layer 12 is not provided on the bottom surface 45 of the heater groove 41 (the back surface of the corrosion-resistant metal plate 10).

  In the illustrated example, the lower end of the carbon heater 4 and the back surface 11d of the heat conductive metal plate 11 are positioned at the same height, and the carbon heater 4 and the heat conductive metal plate 11 are arranged flush with each other. As in the first embodiment (FIG. 4), the reflecting plate 5 extends over the entire bottom of the heating chamber 6 and is disposed horizontally. It is preferable to use a reflecting plate 5 that diffusely reflects infrared rays radiated to the reflecting plate 5.

  The positions of the temperature sensor 16 and the sensor hole 17 are changed from the right side center to the rear center.

  According to the present embodiment, the infrared rays L radiated in the normal direction from the front surface 24 and the back surface 25 of the filament 21 are applied perpendicularly to the left side surface 43 and the right side surface 44 of the heater groove 41, respectively, so The plate 11 can be heated. Naturally, the heat absorption processing layer 12 provided on both the left side surface 43 and the right side surface 44 promotes an increase in heating efficiency. The heat applied to the heat conductive metal plate 11 is transmitted to the corrosion resistant metal plate 10 through the inside of the heat conductive metal plate 11 to heat the corrosion resistant metal plate 10 evenly. Thereby, the corrosion-resistant metal plate 10 can be heated with high heat transfer efficiency and heating efficiency.

  On the other hand, since the infrared rays are radiated from the front surface 24 and the back surface 25 of the filament 21 only in the normal direction, the infrared rays are not transmitted so much to the bottom surface 45 of the heater groove 41 in the direction (upward) perpendicular thereto. Therefore, it can suppress that the corrosion resistance metal plate 10 of the thin small area which forms the bottom face 45 is heated locally, and becomes high temperature.

  Further, the infrared rays are not transmitted so much to the reflector 5 in the other direction (downward) orthogonal to the infrared rays emitted from the front surface 24 and the back surface 25 of the filament 21. Therefore, it can suppress that the reflecting plate 5 is heated and becomes high temperature.

  Thus, basically, the heat absorption processing layer 12 is unnecessary except for the left side surface 43 and the right side surface 44 of the heater groove 41 facing the front surface 24 and the back surface 25 of the filament 21. However, in addition to the direction reciprocating between the front surface 24 and the back surface 25 of the filament 21 and the left side surface 43 and the right side surface 44 of the heater groove 41, there is also infrared radiation (referred to as "leakage infrared radiation") that is radiated or reflected. Conceivable. Therefore, it is also preferable to provide the heat absorption treatment layer 12 in addition to the left side surface 43 and the right side surface 44 of the heater groove 41 in order to collect the leaked infrared rays.

  27 to 34 show modified embodiments relating to the structure around the heater groove 41 and the carbon heater 4. The structure shown in FIGS. 23 to 26 is a basic embodiment.

  In the first modification shown in FIG. 27, in addition to the configuration of the basic embodiment, the heat absorption treatment is performed on the back surface of the corrosion-resistant metal plate 10 forming the bottom surface 45 of the heater groove 41, and the heat absorption treatment layer 12 is provided. ing. Thereby, the leaked infrared rays that have arrived at this portion can be efficiently recovered, and the heat transfer efficiency can be increased.

  In the second modified example shown in FIG. 28, the following configuration is adopted in addition to the configuration of the first modified example. That is, at least one side surface of the heater groove 41, preferably the left and right side surfaces 43 and 44 as shown in the figure, the heat conductive metal plate 11 protrudes from the carbon heater 4 by a predetermined length t1 to the back surface side, and the protruding portion 46 Is formed. Thereby, while reducing the quantity of the infrared rays which leak outside the heater groove | channel 41, leaking infrared rays are collect | recovered efficiently, and the heat conductive metal plate 11 can be heated more efficiently. And the temperature rise of the reflecting plate 5 can also be suppressed.

  Naturally, it is preferable to provide the heat absorption treatment layer 12 also in the protrusion 46 as in the illustrated example. In the illustrated example, the protrusion 46 is provided by increasing the overall thickness of the heat conductive metal plate 11, but the protrusion 46 is increased by increasing the thickness of the heat conductive metal plate 11 only in the vicinity of the left and right side surfaces 43, 44. Can also be provided. By providing the protrusion 46, the back surface 11 d of the heat conductive metal plate 11 is positioned lower than the lower end of the carbon heater 4 at the positions of the left and right side surfaces 43 and 44 of the heater groove 41.

  The third modification shown in FIG. 29 differs from the basic embodiment (FIG. 26) in the following points. That is, the heater groove 41 has a depth t2 'smaller than the thickness t1 of the heat conductive metal plate 11 adjacent to the side of the heater groove 41. As a result, the heater groove 41 leaves the portion of the heat conductive metal plate 11 at the bottom, and does not expose the corrosion-resistant metal plate 10 at the bottom. In other words, the bottom surface 45 of the heater groove 41 is formed by the heat conductive metal plate 11.

  Thereby, the leaked infrared rays that have arrived at the bottom surface 45 of the heater groove 41 can be recovered by the thermally conductive metal plate 11 having a higher thermal conductivity than the corrosion-resistant metal plate 10, thereby improving the heat transfer efficiency. Further, the thickness of the griddle 3 at the position of the heater groove 41 can be increased as compared with the basic embodiment, and the rigidity of the griddle 3 can be increased.

  30 is obtained by applying the configuration of the first modification (FIG. 27) to the third modification (FIG. 29). That is, the heat absorption treatment is performed on the back surface of the heat conductive metal plate 11 that forms the bottom surface 45 of the heater groove 41, and the heat absorption treatment layer 12 is provided. Thereby, the leaked infrared rays that have arrived at this portion can be efficiently recovered, and the heat transfer efficiency can be increased.

  The fifth modification shown in FIG. 31 is obtained by applying the configuration of the second modification (FIG. 28) to the fourth modification (FIG. 30). That is, the heat conductive metal plate 11 protrudes from the carbon heater 4 by a predetermined length t1 on the back surface side, preferably on the left and right side surfaces 43, 44 of the heater groove 41, thereby forming a protruding portion 46. The protruding portion 46 can efficiently collect leaked infrared rays and increase the heat transfer efficiency. If the heat absorption processing layer 12 is provided on the protrusion 46 as in the illustrated example, the recovery efficiency can be increased.

  The sixth modification shown in FIG. 32 employs the following configuration based on the configuration of the basic embodiment (FIG. 26). That is, the groove width M of the heater groove 41 is different between the bottom (upper end) and the open end (lower end). More specifically, the groove width M 1 at the position of the open end 47 of the heater groove 41 is made larger than the groove width M 2 at the position of the bottom surface 45 of the heater groove 41. The left and right side surfaces 43, 44 of the heater groove 41 are inclined so as to open toward the open end 47, whereby the heater groove 41 is formed in a tapered shape that opens toward the open end 47. . As a result, the front surface 24 and the back surface 25 of the filament 21 are not parallel to the left side surface 43 and the right side surface 44 of the heater groove 41, respectively.

  As described above, since the heater groove 41 is tapered so as to open toward the open end 47 side, the processing of the heater groove 41 can be facilitated.

  The seventh modified example shown in FIG. 33 has a heater groove 41 having a tapered cross section similar to the sixth modified example (FIG. 32). However, the taper direction is opposite, and the taper shape is such that it closes toward the open end 47 side.

  Also in the seventh modification, the groove width M of the heater groove 41 is different between the bottom (upper end) and the open end (lower end). However, the size relationship of the groove width M is opposite to that of the sixth modification, and the groove width M1 at the position of the open end 47 of the heater groove 41 is made smaller than the groove width M2 at the position of the bottom surface 45 of the heater groove 41. The left and right side surfaces 43 and 44 of the heater groove 41 are inclined so as to close toward the open end 47 side. As a result, the heater groove 41 is formed in a tapered shape that closes toward the open end 47 side. The front surface 24 and the back surface 25 of the filament 21 are not parallel to the left side surface 43 and the right side surface 44 of the heater groove 41, respectively.

  Thus, by making the heater groove 41 tapered so as to close toward the open end 47 side, the leaked infrared rays are less likely to leak from the heater groove 41, and the heating efficiency can be improved.

  In the eighth modified example shown in FIG. 34, the following configuration is adopted based on the configuration of the basic example (FIG. 26). That is, the heat conductive metal plate 11 is made thinner than the basic embodiment, and the carbon heater 4 protrudes from the heat conductive metal plate 11 by a predetermined length t5 on the back surface side. Thus, by thinning the heat conductive metal plate 11, weight reduction can be achieved and a material and processing cost can be reduced collectively.

  Next, some modified embodiments relating to the configuration of the reflecting plate 5 will be described.

  In the ninth modification shown in FIG. 35, the configuration of the reflector 5 in the basic embodiment is changed. That is, the reflecting plate 5 is divided so as to be individually disposed facing the plurality of heater grooves 41, and the plurality of reflecting plates 5 are provided. Each reflector 5 is disposed below each heater groove 41 and has a slightly larger width than each heater groove 41.

  It is considered that most of the leaked infrared rays radiated from the heater groove 41 are directed toward the heater groove 41, that is, downward. Therefore, it is considered sufficient to provide the reflector 5 only at a position facing the heater groove 41 as in this modification. Compared with the basic embodiment, the total area of the reflector 5 can be reduced, so that the cost can be reduced.

  Although the heat insulating material 9 is provided in the illustrated example, it may be omitted if necessary.

  You may arrange | position each reflecting plate 5 as shown by the virtual line in a figure. In this case, each reflector 5 is disposed in proximity to each heater groove 41. Each reflecting plate 5 is arranged below each heater groove 41 with a predetermined gap and covers each heater groove 41.

  In the 10th modification shown in FIG. 36, the structure of the reflecting plate 5 is changed with respect to the 9th modification (FIG. 35). That is, each reflector 5 in the ninth modification is a flat plate, but each reflector 5 in this modification is formed in a concave shape that is recessed in the direction away from the griddle 3. In the illustrated example, each reflecting plate 5 has a valley shape that is lowest at the position of the center of the width of the heater groove 41.

  In this way, the leaked infrared ray Ld3 leaking from the heater groove 41 can be reflected so as to return more positively into the heater groove 41 as shown in the figure, and the heat transfer efficiency can be further improved.

  Each reflector 5 is disposed in the vicinity of each heater groove 41, is disposed below each heater groove 41 with a predetermined gap, and covers each heater groove 41.

  The eleventh modification shown in FIG. 37 is different from the basic embodiment in the following points. That is, the reflector 5 closes the heater groove 41 that houses the carbon heater 4. The reflection plate 5 is overlapped with the back surface 11d of the heat conductive metal plate 11, spreads over the entire back surface 11d of the heat conductive metal plate 11 located in the heating chamber 6, and closes the downward opening of each heater groove 41. . Note that, as in the second modification (FIG. 28), the heat conductive metal plate 11 protrudes toward the back side with respect to the carbon heater 4, and a gap is formed between the reflector 5 and the carbon heater 4. Although the heat insulating material 9 is provided, you may abbreviate | omit it as needed. The heating chamber 6 can also be omitted.

  According to this, since the reflecting plate 5 closes the heater groove 41, the infrared rays leaking out from the heater groove 41 are substantially eliminated, and the infrared rays can be used for heating the heat conductive metal plate 11 and thus the corrosion resistant metal plate 10 with high efficiency. . Therefore, the heat transfer efficiency can be significantly improved.

  Moreover, the dimension of the height direction from the corrosion-resistant metal plate 10 to the reflecting plate 5 can be remarkably reduced, and the height dimension of the griddle cooker 1 can be reduced. This also facilitates diversion to a home tabletop cooker.

  The carbon heater 4 and the reflection plate 5 can be attached to the cooker body 2. On the other hand, the carbon heater 4 and the reflector 5 (particularly the carbon heater 4) can be attached to the griddle 3. When attached to the griddle 3, the carbon heater 4 and the reflecting plate 5 are integrated with the griddle 3, and convenience can be improved.

  A twelfth modification shown in FIG. 38 is a modification of the eleventh modification (FIG. 37). As in the ninth modification (FIG. 35), the reflector 5 faces the plurality of heater grooves 41 individually. It is divided into a plurality so as to be arranged. Each reflecting plate 5 has a width slightly larger than that of each heater groove 41, and is attached to the back surface 11 d of the heat conductive metal plate 11 so as to close the downward opening portion of each heater groove 41.

  According to this, the total area of the reflecting plate 5 can be reduced more than the eleventh modification, and the cost can be reduced.

  Although various examples related to the ninth embodiment have been described above, various other examples can be considered. For example, an embodiment in which the heat absorption treatment and the heat absorption treatment layer 12 are omitted is also possible. Each feature and each component of each embodiment described here can be freely combined as necessary as long as no contradiction arises. For example, the configurations of the sixth modified example (FIG. 32) and the seventh modified example (FIG. 33) relating to the tapered heater grooves are the first to fifth modified examples (FIGS. 27 to 31) and the eighth modified example (FIG. 34). It is possible to apply it to the heater groove.

[Tenth embodiment]
Next, a tenth embodiment will be described. The tenth embodiment relates to an improvement in the convenience of the griddle cooker 1.

  That is, as shown in FIGS. 39 and 40, this embodiment is based on the first embodiment. The heat conductive metal plate 11 has a slit 50, and the heating area of the griddle 3 is divided by the slit 50. The slit 50 is recessed on the back surface of the heat conductive metal plate 11 like the heater groove 41, but does not accommodate the carbon heater 4, so that the width thereof is narrower than the heater groove 41, preferably It is narrower than the diameter of the carbon heater 4. In the illustrated example, one slit 50 is provided along the front-rear direction at the center of the width of the thermally conductive metal plate 11 so as to divide the heating region into two equal parts. The slit 50 extends in the longitudinal direction of the carbon heater 4. Thereby, the left heating region 51L and the right heating region 51R are formed. However, the number, arrangement, shape, etc. of the slits 50 and the number, arrangement, shape, etc. of the heating regions can be arbitrarily changed. For example, the heating area may be divided into three parts on the left and right with two slits.

  In the illustrated example, the slit 50 has a depth t4 equal to the thickness t3 of the heat conductive metal plate 11 adjacent to the side thereof (however, the thickness of the heat absorption treatment layer 12 is ignored). Thereby, the slit 50 does not leave the part of the heat conductive metal plate 11 in the bottom part, but exposes the corrosion-resistant metal plate 10 in the bottom part. In other words, the bottom surface 52 of the slit 50 is formed by the thermally conductive metal plate 11. The slit 50 is not formed in the corrosion-resistant metal plate 10 and does not reduce the thickness of the corrosion-resistant metal plate 10. In the illustrated example, the heat absorption treatment layer 12 is not provided on the bottom surface 52 (the back surface of the corrosion-resistant metal plate 10) and both side surfaces of the slit 50. This configuration is realized, for example, when the slit 50 is machined after the heat absorption treatment is performed on the back surface of the heat conductive metal plate 11. However, the heat absorption processing layer 12 may be provided on at least one of the bottom surface 52 and both side surfaces of the slit 50. For example, when the slit 50 is machined or the like on the back surface of the heat conductive metal plate 11 and then heat absorption treatment is performed, the heat absorption treatment is inevitably performed on at least one place on the bottom surface 52 and both side surfaces of the slit 50. In some cases, this configuration is realized.

  A predetermined number (four in the illustrated example) of carbon heaters 4 corresponding to each of the heating regions 51L and 51R is provided. The carbon heater 4 in each heating area 51L, 51R can be controlled for each heating area. Temperature sensors 16L and 16R and sensor holes 17L and 17R are provided for the respective heating regions 51L and 51R. 6, the power regulator 33 can supply power to the carbon heater 4 for each of the heating regions 51L and 51R, and the temperature regulator 34 can set the griddle temperature for each of the heating regions 51L and 51R. It is like that. Thereby, the griddle cooker 1 is provided with a temperature adjusting device for adjusting the griddle temperature for each of the heating regions 51L and 51R.

  According to this embodiment, the heating area | region of the griddle 3 is divided | segmented by providing the slit 50 in the heat conductive metal plate 11. FIG. The corrosion-resistant metal plate 10 has a lower thermal conductivity than the heat conductive metal plate 11 and is thin, so that it is difficult to transfer heat. By dividing the heat conductive metal plate 11 that spreads the heat in the plane direction of the griddle and contributes to the uniform temperature of the griddle by the slit 50, the inside of the heat conductive metal plate 11 that moves between the heating regions 51L and 51R. It is possible to divide the heating area by preventing heat transfer.

  Further, by providing a temperature adjusting device for adjusting the griddle temperature for each heating region 51L, 51R, the carbon heater 4 can be individually controlled for each heating region 51L, 51R, and the griddle temperature can be individually controlled. . Therefore, different cooking can be performed simultaneously by changing the griddle temperature of one heating area and the other heating area. Further, energy saving operation is also possible by turning on the carbon heater 4 for cooking only in one heating region and turning off the carbon heater 4 in the other heating region where cooking is not performed. Of course, since the cooking surface is made of one corrosion-resistant metal plate 10, it is excellent in hygiene and maintenance.

  In the illustrated example, a slit 50 extending in the front-rear direction is provided corresponding to the carbon heater 4 extending in the front-rear direction, and the heating region is divided in the left-right direction. However, the carbon heater 4 and the slit 50 may be installed so as to extend in the left-right direction, and the heating area may be divided in the front-rear direction.

  41 to 43 show modified examples of the present embodiment. The example shown in FIGS. 39 and 40 is a basic embodiment.

  In the first modification shown in FIG. 41, the depth of the slit 50 is changed. That is, the slit 50 has a depth t4 'smaller than the thickness t3 of the heat conductive metal plate 11 adjacent to the side thereof (however, the thickness of the heat absorption treatment layer 12 is ignored). Thereby, the slit 50 leaves the part of the heat conductive metal plate 11 in the bottom part, and does not expose the corrosion-resistant metal plate 10 in the bottom part. In other words, the bottom surface 52 of the slit 50 is formed by the thermally conductive metal plate 11.

  According to this, the thickness of the griddle 3 at the position of the slit 50 can be increased as compared with the basic embodiment, and the rigidity of the griddle 3 can be increased.

  The second modification shown in FIG. 42 combines the configurations of the ninth embodiment (FIG. 23). That is, the structure which accommodates the carbon heater 4 in the heater groove | channel 41 provided in the heat conductive metal plate 11 is added. And the slit 50 is provided in the width center part of the heat conductive metal plate 11, and the heating area | region is divided into the left heating area | region 51L and the right side heating area | region 51R.

  According to this, the effect of 9th Embodiment as mentioned above can be exhibited collectively.

  The third modification shown in FIG. 43 is a modification of the second modification (FIG. 42). That is, in the second modified example, the slit 50 has a depth t4 that is equal to the thickness t3 of the heat conductive metal plate 11 adjacent to the side thereof. It has a depth t4 ′ that is less than the thickness t3 of the heat conductive metal plate 11 adjacent thereto. Thereby, the rigidity of the griddle 3 can be increased as compared with the second modification.

  Thus, this embodiment can be combined with various examples and modifications of the ninth embodiment as described above.

[Eleventh embodiment]
Next, an eleventh embodiment will be described. In the above embodiment, the temperature sensor 16 for detecting the temperature of the griddle 3 is arranged so that the detection part 16a of the sensor 16 is located on the side of the griddle 3, whereas in the eleventh embodiment, the griddle 3 The temperature sensor 16 is provided so that the detection unit 16a is located at a substantially central portion in the horizontal direction or the planar direction of 3, and the temperature at the substantially central portion can be directly detected. Below, it demonstrates based on a figure.

  FIG. 44 shows a griddle cooker in which a heater groove 41 is provided in the heat conductive metal plate 11 of the griddle 3 and the carbon heater 4 is accommodated in the heater groove 41 as in the griddle cooker of the ninth embodiment. ing. FIG. 44 corresponds to FIG. In this griddle cooker, a sensor recess that partially defines and forms a sensor passage in which the temperature sensor 16 extends or is accommodated from the side of the griddle 3 (specifically, the heat conductive metal plate 11) to a substantially central portion. 117 extends.

  A cover member 118 is further provided to cover the sensor recess 117 from below. As shown in FIG. 45A, which is a partial cross-sectional view taken along line S45a in FIG. 44, the cover member 118 is provided so as to extend on the lower surface portion or the back surface portion of the griddle 3. The cover member 118 may be attached using an adhesion technique or a mechanical bonding technique. The cover member 118 defines the sensor passage and shields the temperature sensor 16 from the heat of the carbon heater 4.

  That is, if the cover member 118 is not provided, the temperature sensor 16 directly receives the heat from the carbon heater 4 and the temperature rises. As a result, the temperature of the detection unit 16a rises faster than the griddle 3, and the griddle 3 It becomes difficult to accurately detect the temperature. However, according to the configuration of the present embodiment, the temperature sensor 16 can be shielded from the heat of the carbon heater 4 by the cover member 118 as a heat shield member, and the temperature of the griddle 3 can be accurately detected. can do.

  The cover member 118 can be made of various metal materials such as aluminum, aluminum alloy, copper, copper alloy, stainless steel, steel, and alloy steel. The cover member 118 can be made of the same material as that of the reflector 5 described above so as to reflect heat toward the outside of the sensor passage. Alternatively, a layer having a mirror effect may be provided on the surface of the cover member 118 as in the case of the reflector 5. The cover member may be made of an inorganic material such as ceramics having a high heat resistance temperature, but more preferably may be made of a heat insulating material such as a porous material or a ceramic porous body.

  Therefore, the temperature sensor 16 can be extended and arranged in the horizontal center of the griddle 3 via the sensor passage. Therefore, the temperature control of the griddle 3 (that is, the temperature control of the heater 4) is more suitably performed by detecting the temperature of the griddle 3 by the detection unit 16a at the tip of the temperature sensor 16 positioned substantially at the center in the horizontal direction of the griddle 3. be able to. At this time, it is possible to suppress the temperature sensor 16 from directly receiving heat from the carbon heater 4 and the temperature detected by the detection unit 16a from deviating from the actual griddle temperature, and the accuracy of temperature detection and temperature control can be improved.

  The cover member 118 has a simple plate shape as shown in FIG. 45B, which is a cross-sectional view taken along line S45b in FIG. However, as shown in FIG. 45 (c), the cover member 118a may have a V-shaped cross section. Alternatively, the cross section of the cover member 118 may have other shapes such as a U shape.

  As a modified example, the griddle 3 may not be provided with a recess in order to define the sensor passage. This modification will be described with reference to FIG. FIG. 46 (a) shows a cross-sectional view corresponding to FIG. 45 (a). FIG.46 (b) is sectional drawing along line S46b of Fig.46 (a). As can be understood from FIG. 46, in this modification, the sensor passage is defined by a lower surface of the griddle 3 and a cover member 118b having a substantially U-shaped cross section. In this modification, the sensor passage terminates at a recess 117b provided in the griddle 3. The detection unit 16a of the temperature sensor 16 is positioned in the recess 117b. In this modified example, as described with reference to FIG. 45C, the cover member 118b may have a substantially V-shaped cross section, or may have any other cross-sectional shape. Note that the cover members 118, 118 a, and 118 b may further include an attachment allowance (a protruding portion) that contacts the lower surface of the griddle 3.

  As a further modification, the sensor passage may be formed by an independent cover member (hereinafter referred to as an independent cover member). An example is shown in FIG. In FIG. 47, the bellows type independent cover member 118 c covers the periphery of the temperature sensor 16. The independent cover member 118c also forms a heat shield member. Although not shown, the independent cover member 118c is held so as to be positioned within a predetermined range using a holding member such as a stopper. The independent cover member 118c can be expanded and contracted within a certain range, can flexibly correspond to the shape of the temperature sensor 16 bent upward as shown in the drawing, and can hold the bent shape. Therefore, even if the end of the independent cover member 118c is not fixed to the griddle 3, the gap between the end of the independent cover member 118c and the griddle 3 can be minimized. Further, even if the bellows type independent cover member 118c is in contact with the temperature sensor 16, it is very local as shown in FIG. Therefore, even if the independent cover member 118c receives heat directly from the carbon heater 4 and is heated, heat transfer from the independent cover member 118c to the temperature sensor 16 can be minimized.

  The independent cover member may be simply a tubular member, or may be a double tube or a multi-tube structure. In the independent cover member having a double tube structure or a multiple tube structure, a gas such as air may exist between the inner tube and the outer tube. Alternatively, the space between the inner tube and the outer tube may be vacuum-sealed. The tube itself may also be a multi-layer or multi-layer structure having two or more layers or films. The independent cover member may be formed of a thin film member (for example, aluminum foil, heat insulating tape, etc.) wound around the outer periphery of the temperature sensor 16.

  The independent cover member can also be made of the same material and structure as the cover member 118. When the independent cover member is formed of a metal material having a certain degree of thermal conductivity, it is preferable that the independent cover member is a hollow tube to suppress heat transfer from the independent cover member to the temperature sensor 16. Further, a layer having a mirror effect similar to that of the reflector 5 may be provided on the surface of the independent cover member. When the independent cover member is formed of a heat insulating material having a low thermal conductivity, the independent cover member may be a hollow tube, but the independent cover member may be a solid tube and the temperature sensor 16 may be embedded therein.

  In a further modification, the temperature sensor 16 does not extend from the side of the griddle 3 along the lower surface of the griddle 3, but extends from the substantially horizontal center of the bottom surface of the cooker body 2 to the upper side of the griddle 3. Can be provided so as to reach substantially the center in the horizontal direction. Also in this case, since the temperature sensor 16 is covered with the cover member, the temperature sensor 16 can be suppressed from being heated by the heat of the carbon heater 4. Preferably, the cover member that houses the temperature sensor 16 is positioned as far as possible from the carbon heater 4. For example, when the cover member containing the temperature sensor 16 passes between the two carbon heaters 4, the cover member may be positioned so as to pass through a position that is substantially equidistant from the two carbon heaters 4.

  46 and 47, the end portions of the cover member 118b and the independent cover member 118c are bent upward and are in contact with the lower surface of the griddle, but these end portions are not bent upward. Further, it may be open, that is, the portion above the bent portion of the temperature sensor 16 (the detection unit 16a side) may be partially exposed. By doing so, the structure of the cover member 118b and the independent cover member 118c can be further simplified.

  The detection unit 16a of the temperature sensor 16 is not limited to the substantially central portion of the griddle 3, and can be arranged at any position where temperature detection is desired. The structure can be adopted. For example, as in the tenth embodiment described above, when the heating area of the griddle 3 is divided, it is possible to arrange the detection unit 16a substantially at the center of each heating area. At this time, as in the tenth embodiment, the slit 50 (see FIGS. 39 and 40) is not necessarily required to divide the heating area of the griddle 3, and may be omitted. If the carbon heaters 4 corresponding to the respective heating regions are individually controlled, the temperature of each heating region can be naturally controlled.

  Further, a reflection plate for reflecting infrared rays emitted from the filament 21 toward the griddle 3 side may be provided in the tube body 22 that accommodates the filament 21 of the carbon heater 4. As such a carbon heater with a built-in reflector, a mirror heater manufactured by Metro Electric Industry Co., Ltd. can be used. By using such a carbon heater with a built-in reflecting plate, infrared rays can be reflected toward the griddle 3 in the immediate vicinity of the filament 21, and the infrared rays can be efficiently irradiated to the griddle 3. In addition, since the reflecting plate is sealed in an inert gas or a vacuum state in the tube body 22, there is an advantage that oxidation of the reflecting plate can be suppressed.

  As described above, when the detection unit 16a of the temperature sensor 16 is positioned at a substantially central portion in the horizontal direction of the griddle 3, heat from the heater 4 to the temperature sensor 16 may be prevented. Therefore, it is also preferable to set the direction of the reflecting plate in the tube 22 so that the infrared light reflected by the reflecting plate hits the griddle 3 more than the temperature sensor 16.

  Note that the eleventh embodiment can be combined not only with the ninth embodiment but also with modifications thereof, other embodiments, and modifications thereof.

  The preferred embodiments of the present invention have been described in detail above, but various other embodiments of the present invention are possible. Each embodiment mentioned above, each Example or modification, and each component thereof can be freely combined as necessary as long as no contradiction occurs.

  The embodiment of the present invention is not limited to the above-described embodiment, and includes all modifications, applications, and equivalents included in the concept of the present invention defined by the claims. Therefore, the present invention should not be construed as being limited, and can be applied to any other technique belonging to the scope of the idea of the present invention. The various configurations or members described in the above embodiments can be combined in different ways as much as possible.

DESCRIPTION OF SYMBOLS 1 Griddle cooker 3 Griddle 4 Carbon heater 5 Reflector 13 Griddle surface 10 Corrosion-resistant metal plate 11 Thermally conductive metal plate 12 Heat absorption processing layer 16 Temperature sensor 21 Filament 24 Surface 25 Back surface 33 Power controller 34 Temperature controller 41 Heater groove 43 Left side 44 Right side 45 Bottom 50 Slit 51L Left heating area 51R Right heating area L Infrared p Heater pitch

Claims (24)

A plate-shaped griddle for baking the food,
A carbon heater for heating the griddle;
A reflector that reflects infrared rays emitted from the carbon heater and traveling away from the griddle toward the griddle side;
With
The griddle is composed of two metal plates composed of a corrosion-resistant metal plate forming the griddle surface and a thermally conductive metal plate laminated on the back surface of the corrosion-resistant metal plate,
A griddle cooker, wherein a heat absorption process is performed on at least a part of the outer surface of the heat conductive metal plate. The carbon heater has directivity and a plate-like filament, and the filament radiates infrared rays in the normal direction from the front surface and the back surface,
The griddle cooker according to claim 1, wherein the filament and the reflecting plate are arranged non-parallel to each other. A plurality of the carbon heaters are arranged in parallel,
A virtual infrared ray radiated from the back surface of the filament of the specific carbon heater toward the reflector and having the same width as that of the filament, after the regular reflection by the reflector, the specific carbon heater itself and the adjacent carbon heater The griddle cooker according to claim 2, wherein the carbon heater and the reflecting plate are arranged so as not to hit. The griddle cooker according to claim 2 or 3, wherein the reflector is arranged in parallel to the griddle surface, and the filament is arranged non-parallel. The griddle cooker according to claim 2 or 3, wherein the filament is arranged in parallel to the griddle surface, and the reflector is arranged non-parallel. The griddle cooker according to any one of claims 2, 3, and 5, wherein the reflecting plate is arranged so as to move away from the griddle toward the center of the griddle. A plurality of the carbon heaters are arranged in parallel,
The griddle cooker according to claim 6, wherein a pitch between heaters of the carbon heater is increased toward a center portion of the griddle. A plurality of the carbon heaters are arranged in parallel,
4. The griddle cooker according to claim 2, wherein the reflecting plate is formed in an uneven shape so as to be farthest from the filament at a center position of the width of the filament of each of the carbon heaters. A plurality of the carbon heaters are arranged in parallel,
4. The griddle cooker according to claim 2, wherein the reflecting plate has an uneven shape that is closest to the filament at a center position of the width of the filament of each of the carbon heaters. The griddle cooker according to any one of claims 1 to 9, wherein the reflector is formed so that infrared rays radiated to the reflector are diffusely reflected. The griddle cooker according to any one of claims 1 to 10, wherein the heat absorption treatment is performed on a back surface of the thermally conductive metal plate. The carbon heater has directivity and a plate-like filament, and the filament radiates infrared rays in the normal direction from the front surface and the back surface,
The thermally conductive metal plate has a heater groove recessed in the back surface thereof, the carbon heater is accommodated in the heater groove, and the front and back surfaces of the filament are directed to both side surfaces of the heater groove, respectively. The griddle cooker according to claim 1, wherein: The griddle cooker according to claim 12, wherein the heat absorption process is performed on at least one side surface of the heater groove. The griddle cooker according to claim 12 or 13, wherein the heat absorption process is performed on a bottom surface of the heater groove. The griddle cooker according to any one of claims 12 to 14, wherein the heater groove has a depth equal to a thickness of the thermally conductive metal plate adjacent to the side of the heater groove. The griddle cooker according to any one of claims 12 to 14, wherein the heater groove has a depth smaller than a thickness of the thermally conductive metal plate adjacent to the side of the heater groove. The griddle cooker according to any one of claims 12 to 16, wherein, on at least one side surface of the heater groove, the thermally conductive metal plate protrudes toward the back side with respect to the carbon heater. The griddle cooker according to any one of claims 12 to 17, wherein the heater groove is formed in a tapered shape in cross section. The griddle cooker according to any one of claims 12 to 18, wherein the reflecting plate is divided so as to be individually arranged facing the plurality of heater grooves. The griddle cooker according to any one of claims 12 to 19, wherein the reflecting plate closes the heater groove in which the carbon heater is accommodated. The griddle cooker according to any one of claims 12 to 20, wherein the reflector is formed so that infrared rays radiated to the reflector are diffusely reflected. The griddle cooker according to any one of claims 1 to 21, wherein the thermally conductive metal plate has a slit, and a heating region of the griddle is divided by the slit. The griddle cooker according to claim 22, further comprising a temperature adjusting device for adjusting the temperature of the griddle for each heating region. A griddle for baking the food,
A carbon heater for heating the griddle;
A reflector that reflects infrared rays emitted from the carbon heater and traveling away from the griddle toward the griddle side;
With
The griddle is composed of two metal plates composed of a corrosion-resistant metal plate forming the griddle surface and a thermally conductive metal plate laminated on the back surface of the corrosion-resistant metal plate,
The carbon heater has directivity and a plate-like filament, and the filament radiates infrared rays in the normal direction from the front surface and the back surface,
The thermally conductive metal plate has a heater groove recessed in the back surface thereof, the carbon heater is accommodated in the heater groove, and the front and back surfaces of the filament are directed to both side surfaces of the heater groove, respectively. A griddle cooker characterized by being

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