JP2019212360A - Heating coil unit and heating cooker - Google Patents

Abstract

To provide a heating coil unit capable of efficient heating by making temperature distribution uniform even when pans of various shapes are placed in heating of the top surface and a grilling part of a heating cooker.SOLUTION: A coil shape of a grill is made to have a triple structure of an inner heating coil 5 which is an inside circular, a middle heating coil 6 whose outside has a rectangular shape and further an outer heating coil 7 which is an outside rectangular, thereby a shape of each coil matches with that of a portion to be heated, and efficient heating becomes possible since not only special grill plate but also circular pan, etc. are evenly grilled.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a cooking device used in a general household, a commercial kitchen, and the like, and a heating coil unit used for induction heating.

Conventionally, this type of cooking device has a dedicated grill pan that can place an object to be heated in the heating chamber, and is composed of a grill heating coil that performs induction heating on the lower surface of the heating chamber. The heating plate itself is configured to be induction-heated (for example, see Patent Document 1).

Japanese Patent No. 6106845

  However, in the above-described conventional configuration, only a specific heating plate is placed in the heating chamber, so that when the other induction heating pan or the like is placed in the heating chamber, the grill heating coil Due to the shape of the shape, unevenness occurs in the temperature distribution of the pan, uneven heating occurs in the placed food, and depending on the shape of the pan, there is a problem that induction heating cannot be performed using a heating coil. It was.

  The present invention solves the above-mentioned conventional problems, and in the grill heating coil attached to the lower surface of the heating chamber, the coil shape is an elliptical double winding coil, the inner heating coil is circular, the middle heating coil, and the outer heating coil. By making the shape of the rectangle into a rectangular shape, heating the circular pan with the inner heating coil shape, the inner heating coil and the middle heating coil, and the rectangular or elliptical large pot with the inner heating coil, the middle heating coil, and the outer heating coil Thus, the purpose is to make the temperature distribution of the conventional heating plate uniform and to heat efficiently without uneven heating.

  In order to solve the above-described conventional problems, the heating coil unit of the present invention has three heating coil shapes, the inner heating coil is circular, the middle heating coil is approximately rectangular, and the outer heating coil is approximately rectangular. .

  As a result, even when the user tries to heat the pan having various shapes, the temperature distribution can be made uniform and the heating can be efficiently performed.

  The heating coil unit of the present invention can efficiently heat a uniform temperature distribution even when various shapes of pans are placed on the top surface of the heating cooker or the grill.

Configuration schematic diagram of heating coil unit according to the first embodiment of the present invention Schematic diagram of the configuration of the heating coil unit according to the first embodiment of the present invention as viewed from above. Schematic configuration of a heating coil unit according to a fourth embodiment of the present invention Sectional drawing of the heating coil unit of the 4th Embodiment of this invention Partial configuration schematic diagram of the heating coil unit of the fifth embodiment of the present invention Assembly cross-sectional view in the front-rear direction of the induction heating cooker of the sixth embodiment of the present invention Assembly sectional view of the left-right direction of the induction heating cooker of the sixth embodiment of the present invention Assembly sectional view of the vertical direction of the induction heating cooker of the sixth embodiment of the present invention Schematic configuration of a heating coil unit according to a seventh embodiment of the present invention

  According to a first aspect of the present invention, there is provided a heat-resistant insulating plate, a support that supports the insulating plate, an inner heating coil that is disposed below the insulating plate and is formed in a circular shape, and the inner heating coil. By providing an intermediate heating coil formed with an interval on the outer periphery and a substantially rectangular outer heating coil provided with an interval on the outer periphery of the intermediate heating coil, the user can form a circle, an ellipse, or a rectangle. Even when a wide variety of shapes of pans are placed, the temperature distribution can be made uniform and heated efficiently, and the temperature distribution of the pans used during cooking can be improved, so the cooking performance is good Equipment can be provided.

  According to a second invention, in particular, in the heating coil unit of the first invention, the heating coil unit includes a heating plate arranged on the insulating plate for cooking, and the outer heating coil extends along the inner side of the outer peripheral shape of the heating plate. The middle heating coil is provided with a heating coil unit that is substantially rectangular so that the temperature distribution of the dedicated heating plate is made uniform, and the user uses other pans in the heating coil. Even in this case, the temperature can be uniformly heated.

  According to a third invention, in particular, in the heating coil unit of the first or second invention, the number of turns of the intermediate heating coil is less than that of the inner heating coil, and the number of turns of the outer heating coil is less than that of the middle heating coil. By taking the configuration, in the case of a circular pan, the inner heating coil is used to heat the entire pan so that the temperature distribution is uniform. In addition, in the case of a rectangular or elliptical pan, the inner heating coil heats the central portion of the pan, and the middle heating coil heats the periphery of the pan to uniformly heat the temperature distribution. Is possible. In addition, for a large-sized plate such as a dedicated heating plate, the middle part of the plate cannot be heated by the inner heating coil, the outer side of the plate by the outer heating coil, and the inner heating and outer heating by the middle heating coil. By heating the part between the two, it can be heated with good temperature distribution.

  According to a fourth aspect of the present invention, in particular, in the first or second aspect of the present invention, the heating coil is provided by providing a shape parallel to the long side of the outer heating coil and in the vicinity of the four apexes of the outer heating coil. It is possible to improve the temperature distribution in the outer four corners, which is particularly weak in the temperature distribution, and as a result, the temperature distribution can be made uniform even when a large plate or the like is used. In addition, by placing ferrite in the outer four corners, when a circular pan is placed in the center, the pan is not placed on the ferrite, and when the heating plate is placed, the plate is placed on the ferrite. By taking this, it becomes possible to easily discriminate between a circular pan and a heating plate when determining the type of pan based on the electrical characteristics of the coil.

  In the fifth invention, in particular, the outer heating coil and the middle heating coil of the first invention are bowed and spaced apart from the inner heating coil in the previous period. The temperature distribution in the heating coil unit can be made uniform by separating the location where the magnetic flux of the coil is concentrated at the location where the distance of the heating coil is close.

According to a sixth aspect of the present invention, there is provided a main body, a heating chamber disposed in the main body and having a front opening and a bottom surface formed of the insulating plate, and the heating coil unit according to claim 2 disposed below the heating chamber. And a heating cooker placed on the insulating plate and capable of induction heating the grill pan. With this configuration, it is possible to place and heat a wide variety of pots that can be induction-heated in a heating chamber that has been configured to heat the grill pan and is used by consumers. In doing so, a wider range of cooking is possible.

  According to a seventh aspect of the present invention, in particular, in the heating coil unit attached below the heating chamber of the sixth aspect of the invention, the heating coil unit is located at the center of the heating coil unit and in the middle of the inner heating coil and the outer heating coil. By providing a temperature sensor and placing the heating coil unit slightly behind the center of the heating chamber, by providing two temperature sensors slightly behind the center of the heating chamber and forward of the center, the inside of the heating chamber It becomes possible to measure the bottom temperature of various shapes of pans and grill pans placed on the plate.

  According to an eighth aspect of the invention, in particular, in the first aspect of the invention, the pan is placed at any point within the effective range of the heating coil by providing a plurality of temperature sensors between the coils of the heating coil. In addition, it is possible to measure the bottom temperature of a pan or grill pan placed by placing at least one temperature sensor on the bottom of the pan.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 and 2 show a heating coil unit according to the first embodiment of the present invention.

  As shown in FIG. 1, the heating coil unit according to the present embodiment includes an insulating plate 1 made of heat-resistant glass, a support 2 that supports the insulating plate 1, and a heating disposed below the insulating plate. The coil unit 3 is used.

  As shown in FIG. 2, the heating coil unit includes a rectangular inner heating coil 5 and a rectangular middle heating coil 6 disposed on the outer circumference of the inner heating coil 5, and a rectangular shape provided on the outer circumference of the middle heating coil. The heating coil base 8 fixes the three types of coils.

  In addition, a space is provided between the inner heating coil 5 and the intermediate heating coil 6, between the intermediate heating coil 6 and the outer heating coil 7, and the distance between the coil wires is adjacent to the two coils. Is approaching, the magnetic flux of the coil rises locally, and it is reduced that the temperature distribution varies when the pan or the like is heated.

  About the heating coil unit 3 comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the circular pan is placed at the center of the insulator 1, the positional relationship is concentric above the inner heating coil 5. Further, when an elliptical or rectangular pan or the like is placed on the insulating plate 1, the inner heating coil 5 is positioned above the center of the pan, and the middle heating coil 6 is positioned near the outer periphery of the pan. It becomes a relationship. Further, when a large grill pan 4 or the like is placed on the insulating plate 1, the central portion of the grill pan 4 is positioned above the inner heating coil 5 and the vicinity of the outer wall of the grill pan 4 or the like is positioned above the outer heating coil 7. become. The circular inner heating coil 5, the two rectangular middle heating coils 6 and the outer heating coil 7 ensure an area where various shapes of the pot bottom and the coil portion overlap each other, thereby maintaining a uniform temperature distribution in the pot. It becomes possible.

The internal heating coil 5, the intermediate heating coil 6 and the external heating coil 7 are connected to a power supply circuit (not shown), and are connected from the internal heating coil 5 to the intermediate heating coil 6, and from the intermediate heating coil 6 to the external heating coil 7. High frequency power is supplied to the coil, and when the pan is placed, the inductance and resistance of the coil change significantly according to the area where the pan and the heating coil unit 3 overlap. It is possible to determine the type of pot used. In addition, when the pan is placed on the insulator 1 with a large placement area by combining the circular inner heating coil 5, the rectangular middle heating coil 6 and the outer heating coil 7, a round pan or the like The inductance and resistance of the coil when the high-frequency power is supplied vary greatly between the case where it is placed at the center and the case where it is placed off the center. By using this characteristic, it is possible to determine the position of the pan placed on the heating coil unit 3 and to stop heating when a circular pan or the like is not placed in the center.

  In this embodiment, the inner heating coil 5, the middle heating coil 6, and the outer heating coil 7 are connected in series. However, a method for supplying power to the coils, such as controlling each coil independently, is different from the other connection. Since the same effect can be obtained by the method, the method is not limited to this.

  In the present embodiment as shown in FIG. 2, the four corners of the intermediate heating coil 6 and the outer heating coil 7 are rounded, but the present invention is not limited to this.

(Embodiment 2)
As shown in FIG. 1, an induction-heatable grill pan 4 such as aluminum and stainless clad material is placed on an insulating plate 1 in a heating coil unit 3. At that time, when the grill pan 4 is placed on the insulating plate 1, the shape of the external heating coil 7 is substantially similar to the outer periphery of the grill pan 4 so that the outer periphery of the grill pan 4 comes above the external heating coil 7. ing. The intermediate heating coil 6 has a substantially similar shape to the outer heating coil 7.

  About the main body structure of the heating coil unit comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. Refer to Embodiment 1 for the content similar to Embodiment 1 regarding operation | movement and an effect | action.

  First, consider the case where the grill pan 4 is heated in the above configuration. The grill pan 4 is placed on the insulating plate 1. Then, as in the above configuration, the central portion of the grill pan 4 is positioned above the inner heating coil 5, and the outer peripheral portion of the grill pan 4 is positioned above the outer heating coil 7. In addition, by arranging the intermediate heating coil 6 in the middle of the portion of the grill pan 4 that cannot be heated by the inner heating coil 5 and the outer heating coil 7, the entire grill pan 4 can be heated uniformly. It becomes possible. Next, when a pan such as a circle or an ellipse is placed, heating is possible as shown in the first embodiment.

  In addition, by placing the outer heating coil 7 below the outer peripheral portion of the grill pan 4, the outer periphery of the grill pan 4 can be efficiently heated, and the side walls of the grill pan 4 can be easily heated. Can also be obtained. As a result, the uneven heating of the food placed at the corners of the grill pan 4 that occurs when the food is placed on the entire grill pan 4 can be efficiently heated from the side of the grill pan. It is easy to transfer heat.

  As a result, it is possible to heat a wide variety of pots even in a grill plate of an induction heating cooker or a hot plate using induction heating, which has conventionally been mainly used for heating a dedicated plate.

(Embodiment 3)
In the heating coil unit 3 having the configuration shown in FIG. 2 described above, the inner heating coil 5 is a single winding coil, the number of turns is 13, and the middle heating coil 6 is also a single winding coil. The number of turns is 11 and the external heating coil is also a single-turn coil, and the number of turns is 6 so that the number of turns decreases from the inner coil to the outer coil. .

  About the main body structure of the heating coil unit comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  By increasing the number of turns of the inner heating coil 5, a circular coil that is concentric with the circular pan placed in the center of the insulating plate 1 is used to ensure temperature unevenness during heating. ing. Therefore, in the inner heating coil located in the center, it is necessary to heat the circular pan with a good temperature distribution. In a coil that performs induction heating, by increasing the number of turns of the coil, induction heating is facilitated and heating is facilitated. Therefore, in order to efficiently heat the round pan having the most shape as the pan, the number of turns of the inner heating coil 5 is increased to cope with the heating of the round pan.

  Next, the middle heating coil 6 is used to keep the temperature distribution uniform in heating a non-circular pan, mainly a rectangular or elliptical pan. In the heating coil unit 3, the central portion of the placed pan is heated by the above-described inner heating coil 5, and is therefore intended to heat the surroundings. For this reason, the temperature distribution at the time of the heating of the pan is improved by reducing the number of turns from the central part. Further, even in a circular pan larger than the shape of the inner heating coil 5, since it is placed up above the middle heating coil, the inner heating coil 5 and the middle heating coil 6 can be used for efficient heating. .

  Further, the outer heating coil 7 is a coil used when heating a large one such as the grill pan 4 described above, and the inner heating coil 5 and the intermediate heating coil 6 bear most of the cooking surface. ing. Therefore, in the outside heating coil 7 located outside, since it is for some pans, it does not require too many turns.

  Moreover, in the heating coil unit 3 of this Embodiment, the use at the time of mounting a pan in the center part is assumed, and when it is mounted in the position of other than that, the heating according to the performance calculated | required is carried out. It may not be possible. Therefore, by reducing the number of turns of the coil in order from the inner heating coil 5, in the case of a circular pan or the like, when placed at a position away from the center, the change in the inductance and resistance of the coil increases, It is possible to determine whether or not the heating is performed in the state of being placed at the position.

  The inner heating coil, the middle heating coil, and the outer heating coil of this time are described as a single coil. However, in the case of a double coil on a concentric circle having a gap, or on a plurality of concentric circles by completely dividing the coil. The same effect can be obtained when the split coil is used.

(Embodiment 4)
3 and 4 show a view and a cross-sectional view of the heating coil unit according to the fourth embodiment of the present invention as viewed from above.

  In FIG. 3, since the basic configuration is the same as that of the first embodiment, only the difference in configuration will be described.

In the heating coil unit 3, the ferrite 9 and the ferrite 10 are arranged between the inner heating coil 5, the middle heating coil 6, the outer heating coil 7 and the heating coil base 8. Two ferrites 9 are arranged below the inner heating coil on the innermost inner heating coil so as to be parallel to the long side of the middle heating coil, and the ferrite 10 is located near the four corners of the outer heating coil 7. Yes, all are arranged so as to be parallel to the long side of the outer heating coil 7. In addition, two are arranged at each corner, and are arranged at regular intervals (for example, the interval between ferrites is 14 mm).

  Further, the ferrite 10 is located in a range 12 having a radius of about 73 mm from the center of the heating coil unit 3 on the circumference of the circle 11 having a radius of about 110 mm with the center of the eight ferrites centered on the center of the heating coil unit 3. It is placed in a position that will not enter. An insulating plate 13 made of mica is disposed between the heating coil, the ferrite 9 and the ferrite 10, and each is fixed with an adhesive. The ferrite 9 and the ferrite 10 are fixed to the heating coil base 8 with an adhesive.

  About the main body structure of the heating coil unit comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The ferrite 9 disposed below the inner heating coil 5 is intended to assist the heating of the inner heating coil 5, and when the circular pan is placed on the heating coil unit 3, the inner heating coil is the most. It is installed at a position where efficiency is improved.

  With respect to the ferrite 10, by removing from the center of the radius of 73 mm from the center of the heating coil unit 3, high-frequency power was allowed to flow depending on whether the shape of the pan placed on the heating coil unit 3 was circular or other. At this time, the coil inductance and the resistance value are arranged so as to be easily distinguished. Thereby, the change etc. of the input of high frequency electric power become easy with a pan kind.

  Also, from the heating coil unit, by arranging the ferrite center to be located at a position on the circumference of a circle with a radius of 110 mm, in a circular pan larger than the inner heating coil 5 and in an elliptical and rectangular pan, It becomes possible to protect the heating of the outside of a pan, and the dispersion | variation in the temperature distribution at the time of a heating can be reduced.

  Furthermore, in the grill pan 4 according to the second embodiment, the temperature distribution tends to deteriorate during heating at the corners of the grill pan 4, but by placing the ferrite 10 near the corners as described above, the temperature distribution is low. The effect of raising the temperature of the part where it tends to come out is obtained, and the temperature distribution of the grill pan 4 can be adjusted uniformly.

  Thereby, even when various pans are placed in the heating coil unit 3, it is possible to maintain a uniform temperature distribution and to heat more efficiently.

(Embodiment 5)
FIG. 5 shows a schematic view when viewed from the top surface of the heating coil unit according to the fifth embodiment.

  In FIG. 5, since the basic configuration is the same as that of the first embodiment, only the difference in configuration will be described.

  The intermediate heating coil 14 has a shape when the bow shape of each side of the intermediate heating coil 6 is eliminated. Further, the outer heating coil 15 has a shape when the bow shape of each side of the outer heating coil 7 is eliminated.

  About the main body structure of the heating coil unit comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

When each side of the intermediate heating coil 6 is not formed into a bow but is formed linearly like the intermediate heating coil 14, the distance between the inner heating coil 5 and the inner heating coil 5 is 8 mm in the case of the current coil. When the shape is such that an arc having a radius of 470 mm is drawn like the intermediate heating coil 6, the inter-coil distance between the inner heating coil 5 and the intermediate heating coil 6 is 11 mm. When the distance between the coils is short, the magnetic flux generated by the high-frequency power flowing through the two coils is concentrated, so that the concentrated portion of the magnetic flux is heated more strongly than the other during heating, resulting in variations in the temperature distribution of the object to be heated. . Further, if the apex of the intermediate heating coil 6 and the inter-coil distance of the inner heating coil 5 are separated from each other, the distance between the coils will be too far, and the coil between the inner heating coil 5 and the intermediate heating coil 6 will be separated. In the gap, the temperature distribution of the object to be heated varies. For this reason, by using the above-mentioned bow shape, the distance between the coils is ensured in the vicinity, and the distance that should not be separated is secured, thereby reducing the unevenness of the temperature distribution during heating.

  Further, if each side of the outer heating coil 7 is not bowed and is straightened in the same manner as the outer heating coil 15, the distance between the intermediate heating coil 14 and the outer heating coil 15 is 6 mm. By making each side of the coil bow like the heating coil 7, the distance between the coils can be 12 mm. As a result, it is possible to reduce variations in temperature distribution due to magnetic flux concentration. The distance between the coils is an example, and may be changed depending on the number of turns of each coil.

(Embodiment 6)
FIG. 6 shows a cross-sectional view in the vertical direction of the heating cooker according to the sixth embodiment.

  Moreover, FIG. 7 shows the cross-sectional view of the horizontal direction of the heating cooker in this Embodiment 6. As shown in FIG.

  FIG. 8 is a schematic diagram showing the positional relationship between the heating coil unit and the bottom temperature sensor when the heating coil unit according to the sixth embodiment is attached.

  A top surface 17 on which a heated object such as a pan is placed is disposed on the top surface of the main body 16. The heating method of an object to be heated such as a pan in the present embodiment is electromagnetic induction heating, and the top surface 17 is composed of an insulating plate that is not heated by electromagnetic induction such as crystallized glass or borosilicate glass, Below the top surface 17, a top surface heating coil 18 that performs induction heating is provided close to the top surface 17.

  Here, the heating method for heating the object to be heated placed on the top surface 17 is not limited to the electromagnetic induction heating method, and may be, for example, an electric resistance heater using a nichrome wire.

  Although not shown, the top surface heating coil 18 is supplied with high frequency power by a power supply circuit. The main body 16 is provided with a heating box 19 having a substantially box shape and having a front opening and a bottom face, and the opening is covered with a grill door 20 that is movably attached in the front-rear direction. One end of an exhaust tube 21 for discharging smoke generated in the heating chamber 19 to the outside of the main body 16 is connected to the rear portion of the heating chamber 19, and the other end of the exhaust tube 21 is connected to the opening of the top surface 17. In the heating cabinet 19, the grill pan 4 on which the food 22 is placed is housed.

  Above the heating chamber 19, a first heating means (hereinafter referred to as a grill heating means 23) for heating the food 22 from above is arranged, and is close to the upper surface of the ceiling surface 24 of the heating chamber 19. It is attached and the food 22 is heated by radiant heat.

  The grill heating means 23 of the present embodiment is a heater in which a heater wire is wound around a mica plate and insulation is further sandwiched between mica plates. However, other heating means may be used, and the present invention is not limited to this. It is not something.

  A heating coil unit 3 that performs induction heating, which is a second heating means for heating the food 22 from below, is disposed outside the heating chamber 19 and below the heating chamber 19. The grill pan 4, which is detachably attached to 19, is heated directly across the bottom surface 25 of the heating chamber 19.

  The bottom surface 25 of the heating chamber 19 is the same as the insulating plate 1 shown in the first embodiment, and is made of crystallized glass, which is a material excellent in heat resistance, wear resistance, and cleanability. Yes.

In the present embodiment, the entire bottom surface portion 25 is formed of crystallized glass, and the size of the bottom surface portion 25 made of crystallized glass, which is this separate member, is at least a range relative to the heating coil unit 3, that is, The heating coil unit 3 is set larger than the range projected vertically upward.
The heating coil unit 3 is arranged so that the long side of the heating chamber 19 and the long side of the heating coil unit 3 are parallel to each other.

  Further, the bottom surface portion 25 is supported by a support body 26 and is fixed by being sandwiched by flanges 28 formed on the side surface portion 27 of the heating chamber 19 for fixing the position.

  The side surface portion 27 is formed of the same member as the ceiling surface 24 of the grill, and in the present embodiment, the side surface portion 27 is composed of a steel plate subjected to enamel processing.

Further, the support 26 in the present embodiment is the same as the support 2 in the first embodiment.
The grill pan 4 is alternately formed with grill pan convex portions 29 that come into contact with the food 22 and form a mounting surface, and grill pan concave portions 30 that isolate fat generated from the food 22.
The grill pan 4 is held by a grill pan support 32 provided on the grill door 20, and the grill pan 4 is always in the same position in the heating chamber 19 when the grill door 20 is closed. Yes.

  The heating coil unit 3 is fixed so as to maintain a relative positional relationship with the bottom surface portion 25 and the grill pan 4 by using the support body 26 and the grill pan support portion 32. The coil support 31 fixes the heating coil base 8 and the support 26 of the heating coil unit 3 and is made of a resin having excellent heat resistance in order to maintain the insulation between them.

  Further, an exhaust pipe temperature sensor 33 for measuring the temperature of the food in the heating box 19 from the air temperature at the measurement position is attached near the heating box 19 of the exhaust pipe 21.

  In the heating coil unit 3, a bottom temperature sensor 34 is provided at the center of the heating coil unit 3. Further, a bottom temperature sensor 35 is disposed in the center of the front side of the heating chamber 19 in the gap between the inner heating coil 5 and the middle heating coil 6 of the heating coil unit 3. Both the bottom temperature sensor 34 and the bottom temperature sensor 35 are arranged so as to be in contact with the bottom surface portion 25, and for the purpose of measuring the heating chamber and the pan in the heating chamber 19 through the temperature of the bottom surface portion 25. Yes. The heating coil unit 3 is fixed so that the heating coil unit 3 is arranged in the center A of the heating chamber 19 in the left-right direction of the heating chamber 19, but the depth direction is from the center B of the heating chamber to the back direction, The center C of the heating coil unit 3 is arranged at a position of about 10 mm. For this reason, the bottom temperature sensor 34 arranged at the center of the heating coil unit 3 is arranged behind the center of the heating chamber 19 by 10 mm in the depth direction. Further, the center of the heating chamber 19 is arranged between the bottom temperature sensor 34 and the bottom temperature sensor 35.

Further, when the grill door 20 is closed, the bottom temperature sensor 34 and the grill dish convex portion 29 of the grill dish 4 are arranged vertically above the bottom temperature sensor 34. For this reason, the bottom temperature sensor 34 measures the temperature of the grill pan 4 through the temperature of the air between the bottom portion 25, the grill pan 4, and the bottom portion 25.

  About the structure of the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  Refer to Embodiment 1 for the content similar to Embodiment 1 regarding operation | movement and an effect | action.

  By disposing the heating coil unit 3 in the heating chamber 19, the food 22 placed on the grill pan 4 in the heating chamber 19 can be heated from above and below as in Patent Document 1 of the conventional example. By arranging the heating coil unit 3, it is possible to insert a pan or the like other than the grill pan 4 in the heating chamber 19 and to heat from above and below by the grill heating means 23 and the heating coil unit 3 in the same manner as the grill pan. .

  The bottom temperature sensor 34 and the bottom temperature sensor 35 are arranged for the purpose of measuring the temperature of the grill pan 4 and stopping heating when the temperature of the grill pan 4 rises abnormally. Since the grill pan 4 is supported by the grill pan support 32, the positional relationship between the bottom temperature sensor 34 and the bottom temperature sensor 35 can always be measured at the same position, and the temperature rise of the grill pan reaches an abnormal temperature. In such a case, the bottom temperature sensor senses and stops heating. However, by providing the heating coil unit 3 in the heating chamber 19 this time, it is necessary to measure using the bottom temperature sensor 34 and the bottom temperature sensor 35 even when a pan other than the grill pan 4 is placed.

  When the bottom temperature sensor 34 is disposed about 10 mm behind the center of the heating chamber 19 and the bottom temperature sensor 35 is disposed forward of the center of the heating chamber 19, the bottom temperature sensor 34 is placed at the center of the heating chamber 19. 34 and the bottom temperature sensor 35, when placed in the rear of the heating chamber, when placed in the front of the heating chamber with the bottom temperature sensor 34, the bottom temperature sensor 35 can measure the temperature of the pan. Become. The distance shifted backward from the center is an example, and may be changed depending on the size of the heating chamber 19.

  When a pan is placed at the end of the heating chamber 19, the temperature rise of the exhaust tube temperature sensor 33 provided in the exhaust tube 21 behind the heating chamber 19 is higher than when the pan is arranged in the center of the heating chamber 19. Since the temperature rises earlier, when the pan is placed behind the heating chamber, it is possible to determine that the pan placement position is abnormal unlike the actual use position. For this reason, in this embodiment, the positional relationship between the bottom temperature sensor 34 and the bottom temperature sensor 35 is not easily determined by the exhaust pipe temperature sensor 33 when the temperature of the pan rises abnormally. By arranging the temperature sensor 34 and the bottom temperature sensor 35, it is possible to measure the temperature rise regardless of where the pan is placed in the heating chamber 19.

  The bottom surface of the pan placed in the heating chamber 19 is in contact with the bottom surface portion 25, and the bottom temperature sensor 34 and the bottom temperature sensor 35 measure the temperature of the pan through the temperature of the bottom surface portion 25. become. At the time of measuring the temperature of the grill pan 4, there is an air layer between the grill pan 4 and the bottom surface portion 25, but in the case of a pan, there is no air layer between them, so the temperature when the bottom temperature sensor 34 and the bottom temperature sensor 35 are heated. The rise is different. By using this, it becomes possible to distinguish between the grill pan 4 and other pans by the bottom temperature sensor 34 and the bottom temperature sensor 35.

(Embodiment 7)
FIG. 9 shows a schematic view when viewed from the top surface of the heating coil unit showing an example in the seventh embodiment.

In the heating coil unit 3 at the bottom of the heating chamber 19, a bottom temperature sensor 36 is configured in the vicinity of the four corners of the intermediate heating coil 6 between the inner heating coil 5 and the intermediate heating coil 6. Each bottom temperature sensor 36 is configured to be installed with the bottom surface portion 25.

  About the structure of the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  Refer to Embodiment 1 for the content similar to Embodiment 1 regarding operation | movement and an effect | action.

  The pot bottom diameter 37 of the pot is shown in FIG. The bottom shape of the pot indicates the minimum diameter of the pot that can be heated by the heating coil unit 3 in the present embodiment. The minimum diameter of the pan is an effective range in the heating coil unit 3, in the present embodiment, in the range in the heating chamber 19, in the range of about 380 mm in the depth direction and in the range of about 270 mm in the width direction. It is determined that the size is one third or more, and the minimum diameter 37 of the pan that can be placed is 140 mm. The temperature sensor 36 is provided so that at least one temperature sensor is located below the bottom of the pot regardless of where the placeable pan bottom diameter 37 is placed within the effective range of this time. In this case, there are 4 points at the intersections when divided into about 90 mm, which is one third of the total length in the width direction, and 125 mm, which is one third of the whole in the depth direction. Between the heating coil 5 and the intermediate heating coil 6, by attaching the four bottom temperature sensors 36 near the corners of the intermediate heating coil, even when a pan is placed on the bottom surface portion 25, It becomes possible to measure the bottom temperature of the pan. The temperature of the bottom of the pan placed in the effective range is determined by dividing the effective range of the heating coil unit 3 in the vertical and horizontal ranges from the pan bottom diameter 37 at the minimum heatable diameter of the pan, by placing a bottom temperature sensor 36. It becomes possible to measure.

  In addition, in this Embodiment, although the heating coil unit 3 is installed under the bottom face part of the heating chamber 19, the same effect is acquired even if it uses it for the heating coil etc. of a top | upper surface.

  In addition, a present Example shows an example and the position of the temperature sensor 37 distribute | arranged between coils and the number are not limited to this. When the diameter of the pan to be placed is increased, three temperature sensors 36 are placed at the center of the heating coil unit 3 and at intermediate points divided in the width direction between the intermediate heating coil 6 and the outer heating coil 7. In order to reduce the minimum diameter of the pan to be placed, in addition to the example shown this time, an additional temperature sensor is provided between the intermediate heating coil 6 and the outer heating coil 7, so that the pan is placed at any point. It is also possible to measure the bottom temperature of the pan.

  As described above, the heating coil unit according to the present invention can uniformly heat the temperature distribution from a circular pan to a large heating plate (a grill pan in the present invention) by using three types of heating coils. I made it. The configuration that realizes this can be used for the top surface heating and grill heating of stationary and built-in heating cookers that can be used in general households and commercial kitchens, etc. It can be applied to a wide range of cookers such as hot plates.

DESCRIPTION OF SYMBOLS 1 Insulation board 2 Support body 3 Heating coil unit 4 Grill pan 5 Inner heating coil 6 Medium heating coil 7 Outer heating coil 8 Heating coil base 9 Ferrite 10 Ferrite 11 Ferrite 10 installation position 12 Ferrite 10 arrangement prohibition range 13 Insulating board 14 Medium heating Coil (without bow)
15 External heating coil (without bow)
DESCRIPTION OF SYMBOLS 16 Main body 17 Top surface 18 Top surface heating coil 19 Heating chamber 20 Grill door 21 Exhaust pipe 22 Cooking thing 23 Grill heating means 24 Ceiling surface 25 Bottom surface part 26 Support body 27 Side surface part 28 Flange 29 Grill plate convex part 30 Grill dish recessed part 31 Coil support 32 Grill pan support 33 Exhaust tube temperature sensor 34 Bottom temperature sensor 35 Bottom temperature sensor 36 Bottom temperature sensor 37 Pan bottom diameter

Claims (8)

A heat-resistant insulating plate;
A support for supporting the insulating plate;
An inner heating coil disposed below the insulating plate and formed in a circular shape;
A medium heating coil formed at intervals on the outer periphery of the inner heating coil;
A substantially rectangular outer heating coil provided at an interval on the outer periphery of the intermediate heating coil;
Heating coil unit with The heating coil unit includes a grill pan arranged on the insulating plate for cooking,
The heating coil unit according to claim 1, wherein the outer heating coil is formed along an inner periphery of the grill pan, and the middle heating coil is substantially rectangular. The heating coil according to claim 1 or 2, wherein the intermediate heating coil has a smaller number of coil turns than the inner heating coil, and the outer heating coil has a smaller number of coil turns than the intermediate heating coil. unit. The heating coil unit according to claim 1 or 2, wherein the outer heating coil is parallel to a long side of the outer heating coil and ferrite is arranged in the vicinity of four vertices of the outer heating coil. The heating coil unit according to claim 1, wherein each side of the outer heating coil and the middle heating coil has a bow shape. The body,
A heating chamber arranged in the main body, and forming a front opening and a bottom surface portion with the insulating plate,
The heating coil unit according to claim 2 below the heating chamber,
With
A heating cooker for induction heating the grill pan placed on the insulating plate. The heating coil unit is arranged so that the center of the heating coil unit according to claim 2 comes behind the center of the heating chamber, and the center of the inner heating coil, the inner heating coil, and the middle heating coil are arranged. The heating cooker according to claim 6, wherein a temperature sensor is provided at a center in front of the heating chamber. The heating coil unit according to claim 1, wherein a plurality of temperature sensors are provided between the coils in the intermediate heating coil unit.

Images