JP2009059592A - Induction heating cooking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction heating cooking device having a plurality of induction heating parts without increasing the number of infrared sensors and by having members to compose the induction heating cooking device for common use. <P>SOLUTION: A plurality of sensor mounting parts 6a, 6b provided at the lower part of a heating coil 5 for mounting a sensor unit 7 including a light intercepting part to detect infrared rays radiated from a cooking vessel are provided in first and second heating coil units 3a, 3b provided face to face with a top plate 4 in the lower part of the top plate 4 while having the heating coil 5 to apply induction heating to the cooking vessel by generating an AC magnetic field and a coil support plate 6 for supporting the heating coil, and either one of the sensor mounting parts 6a, 6b is suitably selected according to the arrangement positions of the first and second heating units 3a, 3b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an induction heating cooker that induction-heats a cooking container and controls the temperature of the cooking container using an infrared sensor.

  In recent years, induction cooking devices have been widely used as cooking devices that do not use fire. In this induction heating cooker, an infrared sensor is arranged below the center of the heating coil, and the output of the heating coil is controlled by controlling the inverter circuit by the control means in accordance with the output from the infrared sensor (for example, Patent Documents). 1). According to this induction heating cooker, when a cooking container such as an empty pan (which does not contain the object to be cooked) is heated, the cooking container has a heating coil winding with the highest magnetic flux density and high heat generation during heating. Because the temperature of the upper part of the middle part between the outermost circumference and the innermost circumference rises suddenly, the response of the heating output control to the high temperature part of the cooking container is delayed, and a thin stainless steel pan etc. with poor heat conduction and low heat capacity is used as the cooking container. When used, the pan bottom may become red hot and the pan may be deformed, or a small amount of food such as oil may become hot.

  Therefore, by adopting a configuration in which the infrared sensor is arranged not in the center of the heating coil but in the middle of the heating coil or near the inner periphery of the winding of the heating coil, the high temperature part of the cooking vessel is measured by the infrared sensor and the sensitivity is measured. The temperature of the container can be detected well, and the temperature of the cooking container can be controlled with good response by controlling the power supplied to the heating coil using the measurement result. As a result, ignition of a small amount of oil and deformation of the thin cooking container at high temperatures can be prevented.

JP 2005-38660 A

  However, in the induction heating cooker in which the infrared sensor is disposed not in the center of the heating coil but in the middle of the heating coil or near the inner periphery of the winding of the heating coil, the infrared sensor is placed on the top plate on which the cooking container is placed. Since the infrared incident area from the cooking container to the infrared sensor is disposed at a position off the center of the heating coil, the cooking container is not necessarily placed above the infrared incident area. If the cooking container is placed so as not to unintentionally block the infrared incident area, there is a possibility that the temperature of the cooking container cannot be properly detected by the infrared sensor. In this case, for example, the above-mentioned problem can be solved by arranging a plurality of infrared sensors around the center of the heating coil, but the space occupied by the infrared sensor in the induction heating cooker increases, and the configuration inside the apparatus is complicated. There's a problem. Furthermore, since the infrared sensor and its peripheral parts are expensive, there is a problem that the cost of the component parts increases.

  From the above, it is necessary to arrange one infrared sensor at a predetermined position by using one infrared sensor for one heating coil unit. However, in the case of an induction heating cooker in which two or more heating coil units including a heating coil and a coil support plate that supports the heating coil are installed, the situation of the space space around each of the heating coil units Different for each unit. Furthermore, the positional relationship between the peripheral components and the control board that need to be connected to the heating coil unit by connection lines is different for each heating coil unit. Thereby, in the case of the induction heating cooking appliance installed two or more, there exists a problem which cannot arrange | position several heating coil units of the same shape according to the same direction. Moreover, since the heating coil unit of the same shape is not arrange | positioned according to the same direction, an infrared sensor cannot be arrange | positioned in a predetermined position. For this reason, it is necessary to design the component which comprises a heating coil unit for every heating coil unit with respect to each of a heating coil unit. Thus, since the heating coil unit cannot be shared, there is a problem that the number of parts increases, the assembling workability is poor, and the assembling cost increases.

  Therefore, the present invention has been made in view of such problems of the prior art, and does not increase the number of infrared sensors, and the members constituting the induction heating cooker having a plurality of induction heating portions are provided. It aims at providing the induction heating cooking appliance which shares and uses several induction heating parts.

In order to achieve the above object, the present invention is configured as follows.
According to the first aspect of the present invention, the top plate mounted on the induction heating cooker main body constituting the outer shell, on which the plurality of cooking containers are placed, and facing the top plate, below the top plate. First and second heating coil units that have a heating coil that generates an AC magnetic field and induction-heats the cooking container and has a coil support plate that supports the heating coil, and cooking is provided below the heating coil. A sensor unit including a light receiving unit that detects infrared rays emitted from a container; and a control unit that controls electric power supplied to the heating coil in accordance with an output of the light receiving unit, wherein the coil support plate includes the sensor unit. Each of the sensor units attached to each of the first and second heating coil units is attached to the coil support plate. Among the plurality of sensor unit mounting portions, the second heating coil units in the induction heating cooker main body are attached to different sensor unit mounting portions and have a predetermined angle with respect to the first heating coil unit. The induction heating cooker is provided in which the first heating coil unit and the second heating coil unit are arranged at a predetermined interval.

  According to the second aspect of the present invention, the coil is configured to guide the infrared light from the cooking container to the light receiving part through the infrared incident region through which the infrared radiation emitted from the cooking container formed on the top plate is transmitted. The induction heating cooker according to the first aspect, which is formed integrally with a support plate, is provided.

  According to the third aspect of the present invention, the infrared rays from the cooking vessel are transmitted through the sensor unit attachment portion to which the sensor unit is attached and the infrared incident region through which infrared rays radiated from the cooking vessel formed on the top plate are transmitted. The light guide unit further includes a light guide unit that leads to the light receiving unit, and the coil support plate includes a plurality of light guide unit fixing units to which the light guide unit is attached, and a light guide in which the light guide unit is inserted. The light guide unit has a plurality of coil support plate mounting portions to be attached to the coil support plate, and the first and second heating coil units are replaced with a portion receiving portion. Each of the light guide units attached to each of the coil support plates is different from each other among the plurality of light guide unit attachment portions in the light guide unit. Attached to preparative mounting portion, to provide an induction heating cooker according to the first embodiment.

  According to a fourth aspect of the present invention, in the third aspect, further comprising a plurality of magnetic bodies provided below the heating coil, wherein the light guide unit holds end portions of the plurality of magnetic bodies. An induction heating cooker as described is provided.

  According to the present invention, by adopting a configuration in which a plurality of sensor unit mounting portions are formed on the coil support plate, each of the first and second heating coil units having the heating coil and the coil support plate is arranged. One sensor unit can be attached corresponding to each position. As a result, it is possible to accurately measure the high temperature portion of the cooking container P without increasing the number of sensor units including an infrared sensor for each of the first and second heating coil units. Furthermore, since the components can be shared without designing the corresponding components for the first and second heating coil units, the assembly workability can be improved, and the assembly cost can be reduced. Can do.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is an external perspective view of an induction heating cooker C according to the present invention. As shown in FIG. 1, the induction heating cooker C according to the present invention includes a main body 1 constituting an outline, and a main body 1. A top plate 4 that is attached to the top and on which a cooking container P such as a pan is placed, and a substantially disc-shaped heating coil 5 (see FIG. 3) that is provided below the top plate 4 to be described later and generates a high-frequency magnetic field. ing.

  The top plate 4 is a non-magnetic material that transmits light and is formed into a plate shape using an insulator such as crystallized ceramic as a material. In addition, the top plate 4 is printed so that a circular area facing the upper surface of the heating coil 5 is displayed on the back surface or the front surface of the top plate 4, and the heating unit on which the range in which the cooking container P is placed is displayed. 2a, 2b and 2c are provided.

  Here, FIG. 2 which is a principal part partial top view of the heating parts 2a and 2b in the top plate 4 provided in the induction heating cooking appliance C of FIG. 1 is shown. As shown in FIG. 2, an infrared sensor display window 4g described later is further formed in the heating units 2a and 2b, and the planar shape thereof is substantially rectangular. The infrared sensor display window 4g is an area facing the opening at the upper end of a light guide section 14 (see FIG. 3), which will be described later, within the range (inside), and is an infrared ray emitted from the cooking container P and received by the infrared sensor 10. Are formed so as to include an infrared incident region 4a which is an incident region of the light emitting region 4b and a light emitting region 4b which is a range in which light emitted from the light emitter 11 described later can be visually recognized. The infrared sensor display window 4g may be provided with a translucent printing film (not shown) such as white or brown to make it difficult to see the inside when viewed from the outside. Further, infrared rays may be transmitted through the entire infrared sensor display window 4g. Further, a light shielding layer film (not shown) may be provided on the lower surface of the top plate 4 in a part of the infrared sensor display window 4g. For example, the infrared sensor 8 is provided with a light shielding layer for transmitting light in the region of the infrared sensor display window 4g other than the light emitting region 4b of the light emitted from the infrared incident region 4a and the light emitting unit 9 (see FIG. 3). Intrusion of disturbance light into (see FIG. 3) can be suppressed.

  Here, a schematic cross-sectional view of the induction heating cooker C according to the first embodiment, that is, a schematic cross-sectional view along a straight line XX passing through the center of the heating unit 2a in FIG. 4 is a schematic plan view showing the inside of the induction heating cooker C according to the first embodiment shown in FIG.

  As shown in FIG. 3, the 1st heating coil unit 3a is arrange | positioned under the heating part 2a. The first heating coil unit 3a has a substantially disc-shaped heating coil 5 that generates a high-frequency magnetic field by flowing a high-frequency current and induction-heats the article to be heated P, and a coil support plate 6 that supports the heating coil 5. ing. Similar to the first heating coil unit 3a, a second heating coil unit 3b having the heating coil 5 and the coil support plate 6 is also disposed below the heating unit 2b. A heating coil unit 3c is also disposed under the heating unit 2c. The first heating coil unit 3a and the second heating coil unit 3b are the same in the components and the like except that the mounting position of the sensor unit described later is different. It explains using.

  The heating coil 5 is placed on a coil support plate 6 made of heat-resistant resin or the like, and a plurality of rod-like coil holders (not shown) are screwed to the coil support plate 6 at the outer periphery of the heating coil 5. The inner peripheral portion of the heating coil 5 is held and held by the tip of the coil holder, and below the coil support plate 6 is the front side from the center of the heating coil 5 (the same applies below as viewed from the cook). ) Is provided with a sensor unit 7 for detecting the temperature of the bottom of the cooking container P.

  The sensor unit 7 includes an infrared sensor 8 that detects the temperature of the bottom of the cooking container P and a light emitting unit 9 that emits light toward the top plate 4. Moreover, the infrared sensor 8 and the light emission part 9 are installed on the board | substrate (not shown), and are electrically connected with the other electrical component.

  Here, FIG. 5 which is the perspective view seen from the bottom of the 1st heating coil unit 3a is shown.

  The coil support plate 6 is formed with a first sensor unit mounting portion 6 a and a second sensor unit mounting portion 6 b for fixing the sensor unit 7. In the coil support plate 6, the first sensor unit attachment portion 6 a is disposed at a position rotated by an angle α with respect to the center of the heating coil 5. Note that the angle α between the first sensor unit mounting portion 6a and the second sensor unit mounting portion 6b with respect to the center of the heating coil 5 is the size of the induction heating cooker C, other induction heating cooking. It is determined as appropriate considering the sharing of parts with the container. In the coil support plate 6, the first sensor unit mounting portion 6 a and the second sensor unit mounting portion 6 b are sensors at positions where the temperature of the bottom of the cooking container P located on the near side from the center of the heating coil 5 can be detected. It arrange | positions so that the unit 7 may be attached.

  Next, with reference to FIG. 4, the arrangement position of the sensor unit 7 on the coil support plates of the first heating coil unit 3a and the second heating coil unit 3b will be described. In the first heating coil unit 3a, the sensor unit 7 is fixed to the sensor unit mounting portion 6a formed on the coil support plate 6 with a screw. In the second heating coil unit 3b, the sensor unit 7 is fixed to the sensor unit mounting portion 6b formed on the coil support plate 6 with a screw. Further, in the induction heating cooker C according to the first embodiment, as shown in FIG. 4, the second heating coil unit 3b is rotated clockwise by an angle α with respect to the first heating coil unit 3a. The first heating coil unit 3a and the second heating coil unit 3b are arranged at a predetermined interval. Thereby, in any of the first heating coil unit 3a and the second heating coil unit 3b, the sensor unit 7 is arranged vertically from the approximate center of the heating coil 5 to the front surface of the induction heating cooker C and on the near side. . As a result, in the heating units 2a and 2b, the light of the light emitter 11 that emits light on the outer edge side of the heating coil 5 in the vicinity of the infrared incident region 4a is disposed on the front side of the induction heating cooker C. A person can more easily recognize the light emitting portion, and the usability can be further improved.

  As described above, according to the induction heating cooker of the first embodiment, since the plurality of sensor unit attachment portions are formed on the coil support plate 6, the first and second having the heating coil 5 and the coil support plate 6. One sensor unit 7 can be attached to each of the heating coil units 3a and 3b corresponding to the positions where the heating coil units 3a and 3b are arranged. Thereby, the high temperature part of the cooking container P can be measured accurately, without increasing the sensor unit 7 provided with the infrared sensor 8 with respect to each of the first and second heating coil units 3a and 3b. Furthermore, since it is possible to share parts without designing the corresponding components for each of the first and second heating coil units 3a and 3b, it is possible to improve the assembly workability and reduce the assembly cost. Can be suppressed.

  The coil support plate 6 according to the first embodiment has been described with two sensor unit mounting portions 6a and 6b provided. For example, the third sensor unit mounting portion 6c and the fourth sensor unit mounting portion 6d are provided. And may be further formed.

About the induction heating cooking appliance C comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.
When the food is put into the object to be heated P and cooked by the induction heating cooker C according to the present invention, when the power switch (not shown) of the induction heating cooker C is turned on, the light emitting section 9 emits light and the emitted light. Is guided to the light guide 10 and in the vicinity of the infrared incident area 4a of the top plate 4 (the outer side in the radial direction of the heating coil 5 with respect to the infrared incident area 4a on the near side from the center of the heating coil 5, in this embodiment, The light emitting region 4b is irradiated on a line passing through the center of the heating coil 5 and perpendicular to the front surface of the main body 1). Therefore, the user can visually recognize the light emitted from the light emitting region 4b provided on the radially outer side of the heating coil 5 with respect to the infrared incident region 4a, and the object to be heated P is placed on the top 4 so as to close the light emitting region 4b. The infrared sensor 8 can reliably receive the infrared rays emitted from the bottom surface of the article P to be heated.

  When the operation panel 11 is operated to start heating, the control means 12 a supplies a high frequency current to the heating coil 5 via the inverter power supply 13. When a high frequency current is supplied to the heating coil 5, the heating coil 5 generates an alternating magnetic field, and the temperature of the article P to be heated rises by induction heating. When the temperature of the object to be heated P rises, the object to be heated P generally emits infrared energy proportional to the fourth power of its absolute temperature, as shown by Stefan-Boltzmann law. The infrared rays radiated from the object to be heated P pass through the infrared incident region 4a and the inside of the first light guide portion 14a and reach the infrared sensor 8.

  When the temperature of the article P to be heated increases, the output signal of the infrared sensor 8 receiving infrared energy increases, and as described above, this output signal is amplified by the amplifier and input to the temperature conversion means 12b. The output signal of the infrared sensor 8 is converted into the temperature of the object P to be heated by the conversion means 12b. The control means 12a stops the supply of the high-frequency current output from the inverter power supply 13 to the heating coil 5 or reduces the high-frequency current when the converted temperature of the article P to be heated exceeds a predetermined temperature set in advance. Adjust to.

  The infrared incident region 4a is formed so as to face the opening surface at the upper end of the first light guide portion 14a provided so as to be located inside the outer edge portion of the heating coil 5 at a position different from the center of the heating coil 5. This is a portion of the top plate 4. Since the emitted light of the light emitting part 9 guided by the second light guide part 14b is emitted from the infrared incident area 4a in the radial direction outside the heating coil 5 so as to be visible, the temperature is higher than above the central part of the heating coil 5. Infrared rays emitted from the heated object P can be incident on the infrared sensor 8 and the center of the heated object P is brought as close as possible to the center of the heating coil 5 to heat the light emitting region 4b. The bottom surface of the object P can be covered. Thereby, the magnetic coupling between the heating coil 5 and the heating container P can be increased, that is, the heating object P can be positioned on the infrared incident region 4a while increasing the heating efficiency. Therefore, it is possible to reliably control the temperature of the object P to be heated by the infrared sensor 8 while increasing the heating efficiency, and the abnormal heat generation of the object P is suppressed to improve safety, and cooking at a high temperature. Can be performed efficiently, improving usability.

  The top plate 4 includes an infrared sensor display window 4g for displaying an area surrounding at least a part of the infrared incident area 4a, and the light emitted from the light emitting unit 9 can be visually recognized in the vicinity of the infrared sensor display window 4g. Therefore, the user indicates the meaning of the light emission in the light emitting region 4b of the light emitting unit 9, the infrared incident region 4a that does not emit light, and the presence of the infrared sensor 8, and the light emitting region 4b by the light of the light emitting unit 9 near the infrared sensor display window 4g. And the infrared incident region 4a can be easily recognized.

  Further, since the infrared incident area 4a is positioned on the front side of the center of the heating coil 5, the light of the light emitting portion 9 that emits light on the outer edge side of the heating coil 5 near the infrared incident area 4a is above the cooking container. When P is not located, it is difficult to hide from the side wall of the cooking container P when viewed from the cook side, and the cook can more easily visually recognize the light emitting portion.

  In addition, since the infrared incident region 4a is positioned on a line that passes through the center of the heating coil 5 and is orthogonal to the front surface of the main body, the light of the light emitting unit 9 that emits light on the outer edge side of the heating coil 5 near the infrared incident region 4a When the object to be heated P is not located thereabove, it is most difficult to hide on the side wall of the object to be heated P when viewed from the user side, so that the user can most easily see the light emitting part and further improve the usability. be able to.

  Further, when the first thermistor 15 serving as the first temperature detecting means for detecting the back surface temperature of the top plate 4 by heat conduction is provided on the opposite side of the infrared incident area 4a with respect to the center of the heating coil 5, the heating coil 5 is provided. In addition to the infrared sensor 8 that measures a temperature higher than the temperature of the object P to be heated at the center upper part, the temperature of the part of the object P to be heated that is higher than the center upper part of the heating coil 5 is measured by the first thermistor 15. Therefore, even when the infrared sensor 8 fails or when the temperature of the heated object P cannot be detected by the infrared sensor 8, such as when the heated object P does not properly cover the infrared incident area 4a, the first thermistor. 15, the temperature of the article P to be heated can be detected, so that safety and usability are further improved.

  Further, when a second thermistor 16 serving as a second temperature detecting means for detecting the back surface temperature of the top plate 4 by heat conduction is provided at substantially the center of the heating coil 5, it is located above the center of the heating coil 5 of the object P to be heated. In addition to the infrared sensor 8 that measures the portion of the object P to be heated that is higher than the position of the bottom surface, the bottom surface temperature of the object P to be heated is changed with respect to the deviation of the center position of the object P from the center of the heating coil 5. Therefore, when the ambient light is incident on the infrared sensor 8, the temperature measurement circuit using the infrared sensor 8 such as the infrared sensor 8 or the temperature conversion means 12b breaks down. Even when the temperature of the heated object P cannot be detected by the infrared sensor 8 such as when the heated object P does not cover the infrared incident region 4a, the temperature of the heated object P can be detected by the second thermistor 16. In, it is possible to accurately control the steady-state temperature, such as the temperature of the oil during frying, usability is further improved. By providing a first thermistor 15 on the opposite side of the infrared sensor 8 with respect to the center of the heating coil 5, reliability when disturbance light enters the infrared sensor 8 or when the position of the object P to be heated occurs. Can increase the sex.

(Second Embodiment)
In addition, this invention is not limited to the said embodiment, It can implement with another various aspect. For example, FIG. 6 shows an exploded perspective view of the induction heating cooker C according to the second embodiment of the present invention as viewed from below the first heating coil unit 23a. Since the configuration of the first heating coil unit 23a itself is the same as that of the first heating coil unit 3a of the first embodiment, the same reference numerals are given to the same components and the description thereof is omitted. . In the induction heating cooker C according to the second embodiment, the first heating coil unit 23a and the second heating coil unit 23b are disposed below the heating units 2a and 2b. The second heating coil unit 23b has the same configuration as that of the first heating coil unit 23a itself. Hereinafter, description will be given using the first heating coil unit 23a.

  Here, FIG. 6 is a schematic exploded perspective view when viewed from below the first heating coil unit 23a in the induction heating cooker C according to the second embodiment.

  As shown in FIG. 6, the first heating coil unit 23 a according to the second embodiment includes a heating coil 5 (not shown), a magnetic body 18, a coil support plate 26, and a light guide unit 27.

  The magnetic body 18 concentrates the magnetic flux from the heating coil 5 in the vicinity of the heating coil 5. In addition, a plurality of radially extending magnetic bodies 18 are attached to the coil support plate 6 at predetermined intervals.

  The coil support plate 26 is formed of a heat resistant resin or the like as in the first embodiment. The heating coil 5 is placed on the coil support plate 6. The coil support plate 26 is formed with a light guide unit fixing portion 26a for attaching a light guide unit 27 described later. The coil support plate 26 is formed with a light guide receiving part 26 into which a light guide 14 formed integrally with a light guide unit 27 described later is inserted.

  The light guide unit 27 includes a first light guide unit attachment portion 27a and a second light guide unit attachment portion 27b. In the light guide unit 27, the first light guide unit mounting portion 27 a is disposed at a position rotated by an angle α with respect to the center of the heating coil 5. Note that the angle α between the first light guide unit mounting portion 27a and the second light guide unit mounting portion 27b with respect to the center of the heating coil 5 depends on the size of the induction heating cooker C and other inductions. It is determined as appropriate in consideration of sharing parts with the cooking device. Further, in the light guide unit 27, the first sensor unit mounting part 27a and the second sensor unit mounting part 27b are sensors at positions where the temperature of the bottom of the cooking container P located on the near side from the center of the heating coil 5 can be detected. It arrange | positions so that the unit 7 may be attached.

  Further, the light guide unit 27 has a sensor unit mounting portion 26c, and the sensor unit 7 is fixed to the sensor unit mounting portion 26c with screws. Further, the light guide unit 27 is formed integrally with the light guide unit 14.

  The light guide unit 27 has a plurality of magnetic body holding portions 27d. Thereby, since the edge part of the some magnetic body 18 currently fixed to the coil support plate 26 is hold | maintained by the some magnetic body holding | maintenance part 27d formed in the light guide unit 27, if the magnetic body 18 is hold | maintained mechanically, At the same time, the magnetic body holding portion 27d can be fixed to the heating coil 5, and the configuration becomes simple.

  When the light guide unit 27 is fixed to the coil support plate 26, the light guide unit fixing portion 26a is fixed to either the first light guide unit attachment portion 27a or the second light guide unit attachment portion 27b with screws. The Moreover, either the 1st light guide unit attaching part 27a or the 2nd light guide unit attaching part 27b respond | corresponds to the arrangement position of the 1st and 2nd heating coil units 23a and 23b in the induction heating cooking appliance C. Determined. Further, when the light guide unit 27 is fixed to the coil support plate 26, the light guide unit 14 formed integrally with the light guide unit 27 is fixed to the light guide unit fixing unit 26a. Corresponding to either the mounting part 27a or the second light guide unit mounting part 27b, the light guide part receiving part 26 formed on the coil support plate 26 is inserted into either one of the light guide part receiving parts 26. Thereby, the infrared rays emitted from the cooking container P are received by the infrared sensor 8 provided in the sensor unit 7, and the light emitted from the light emitting unit 9 can be visually recognized through the infrared sensor display window 4g.

  In addition, in the induction heating cooker C according to the second embodiment, the first heating coil unit 23a and the second heating coil unit 23b are arranged at a predetermined interval, so that the first embodiment is applied. Similarly to the induction heating cooker C, the second heating coil unit 23b is arranged so as to be rotated clockwise by an angle α with respect to the first heating coil unit 23a. Thereby, in any of the 1st heating coil unit 23a and the 2nd heating coil unit 23b, sensor unit 7 is arranged in the perpendicular direction and the near side from the approximate center of heating coil 5 to the front of induction heating cooking appliance C. . As a result, in the heating units 2a and 2b, the light of the light emitter 11 that emits light on the outer edge side of the heating coil 5 in the vicinity of the infrared incident region 4a is disposed on the front side of the induction heating cooker C. A person can more easily recognize the light emitting portion, and the usability can be further improved.

  As described above, according to the induction heating cooker of the second embodiment, since the light guide unit 27 is formed with the plurality of light guide unit attachment portions, the first and first components having the heating coil 5 and the coil support plate 6 are provided. The light guide unit 27 to which the sensor unit 7 is fixed corresponding to the position where each of the two heating coil units 23a and 23b is disposed can be scraped. Thereby, without increasing the sensor unit 7 provided with the infrared sensor 8 with respect to each of the first and second heating coil units 23a and 23b, that is, with each one sensor unit 7, the high temperature of the cooking container P is increased. The part can be measured with high accuracy. Furthermore, since the components can be shared without designing the corresponding components for the first and second heating coil units 23a and 23b, the assembly workability can be improved, and the assembly cost can be reduced. Can be suppressed.

  Further, according to the induction heating cooker of the second embodiment, the coil support plate is configured by adopting the configuration of the portion where the sensor unit 7 is fixed to the light guide unit 27 and the portion where the magnetic body 18 is held. Since the function required for 26 is simplified, the shape of the coil support plate 26 can be simplified. Thereby, the metal mold | die structure of the coil support plate 26 becomes simple, and it has the advantage that manufacturing cost, such as metal mold | die manufacture, can be reduced.

  While the present invention has been described in detail above, the above description is in all respects illustrative and not restrictive. Of course, many other modifications and variations are possible without departing from the scope of the invention.

  It is to be noted that, by appropriately combining arbitrary embodiments of the various embodiments described above, the effects possessed by them can be produced.

  The induction heating cooker according to the present invention has the effect that the members constituting the induction heating cooker having a plurality of induction heating portions can be shared without increasing the number of infrared sensors. In addition to induction heating, the present invention is useful for home or business induction heating cookers that use an infrared sensor to control the temperature of a cooking container.

Model appearance perspective view of induction heating cooker C according to the present invention The schematic top view of the principal part of heating part 2a, 2b in the top plate 4 provided in the induction heating cooking appliance C of FIG. Schematic schematic cross-sectional view of the induction heating cooker C according to the first embodiment Schematic schematic plan view showing the inside of the induction heating cooker C according to the first embodiment. Schematic perspective view when viewed from below the first heating coil unit 3a The model exploded perspective view at the time of seeing from the bottom of the 1st heating coil unit 23a in the induction heating cooking appliance C concerning this 2nd Embodiment.

Explanation of symbols

1 body, 2 heating section, 2a first heating section, 2b second heating section,
3a 1st heating coil unit, 3b 2nd heating coil unit, 4 top plate,
4a Infrared incident area, 4b Emission area, 4g Infrared sensor display window,
5 heating coil, 6 coil support plate, 6a first sensor unit mounting portion,
6b Second sensor unit mounting portion 7 Sensor unit, 8 Light receiving portion, 9 Light emitting portion, 11 Operation panel, 12 Control board, 12a Control means, 12b Temperature conversion means, 14 Light guide portion, 15 First thermistor, 16 First 2 thermistors,
18 Magnetic body, 23a 1st heating part, 23b 2nd heating part,
26 coil support plate, 26a light guide unit fixing part, 26b light guide part receiving part, 27 light guide unit, 27a first light guide unit mounting part,
27b second light guide unit mounting portion, 27c sensor unit mounting portion,
27d Magnetic body holding part, 27 reflection suppression means, C induction heating cooker, P cooking container

Claims (4)

A top plate that is attached to the upper part of the induction heating cooker body constituting the outer shell and on which a plurality of cooking containers are placed;
First and second heating coils, which are provided below the top plate so as to face the top plate, have a heating coil that generates an AC magnetic field and induction-heats the cooking vessel, and a coil support plate that supports the heating coil. Unit,
A sensor unit that is provided below the heating coil and includes a light receiving unit that detects infrared rays emitted from the cooking container;
Control means for controlling the power supplied to the heating coil according to the output of the light receiving unit,
The coil support plate has a plurality of sensor unit mounting portions for mounting the sensor unit,
Each of the sensor units attached to each of the first and second heating coil units is attached to the different sensor unit attachment portions among the plurality of sensor unit attachment portions of the coil support plate,
The second heating coil unit in the induction heating cooker body is rotated by a predetermined angle with respect to the first heating coil unit, and the first heating coil unit and the second heating coil unit are An induction heating cooker, which is arranged at a predetermined interval.   A light guide part that guides infrared light from the cooking container to the light receiving part through an infrared incident region through which infrared light radiated from the cooking container formed on the top plate passes is formed integrally with the coil support plate. The induction heating cooker according to claim 1. A sensor unit mounting portion for mounting the sensor unit, and a light guide portion for guiding infrared rays from the cooking container to the light receiving portion through an infrared incident region through which infrared rays radiated from the cooking vessel formed on the top plate are transmitted. A light guide unit further comprising:
The coil support plate is replaced with a configuration in which a plurality of light guide unit fixing portions to which the light guide unit is attached and a light guide portion receiving portion into which the light guide portion is inserted, are formed.
The light guide unit has a plurality of light guide unit attachment parts attached to the coil support plate,
The light guide units attached to the coil support plates of the first and second heating coil units are different from each other among the plurality of light guide unit attachment portions in the light guide unit. The induction heating cooker according to claim 1 attached to an attaching part. A plurality of magnetic bodies provided below the heating coil;
The induction heating cooker according to claim 3, wherein the light guide unit holds end portions of the plurality of magnetic bodies.

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