JP2021118041A - Electromagnetic cooker - Google Patents

Abstract

To provide an electromagnetic cooker which allows a user to easily notice a high-temperature state of a top plate without causing appearance deterioration and a steep rise in cost.SOLUTION: An electromagnetic cooker 1A has an electromagnetic induction-type heating coil under a top plate 10 and includes heating parts 10a, 10b for heating a cooking tool placed on the top plate 10. The electromagnetic cooker 1A also has high-temperature indicating parts 7a, 7b which are disposed at predetermined positions on the top plate 10 and indicate that areas of an upper surface of the top plate 10 serving as the heating parts 10a, 10b are in a high-temperature state at a predetermined temperature or higher. The high-temperature indicating parts 7a, 7b are characterized in that an LED 150 disposed under the top plate 10 made of translucent glass in a predetermined color is turned on so as to indicate the high-temperature state by LED light transmitting through the top plate 10 and emitting light in a manner visible from outside.SELECTED DRAWING: Figure 1

Description

The present invention relates to an electromagnetic cooker provided with an electromagnetic induction heating coil below the top plate, and particularly provides a high temperature display means for alerting the user not to get burned by touching the high temperature top plate. Regarding the electromagnetic cooker prepared for a part of.

In an electromagnetic cooker, the heat-resistant glass top plate on which cooking utensils such as pots and frying pans are placed is usually in a high temperature state during cooking and for a while after cooking, but the high temperature state is apparent. Since it is difficult to understand, the problem is that the top surface of the top plate is inadvertently touched and injured.

In response to this problem, Japanese Patent Application Laid-Open No. 5-52354 states that a plurality of LEDs arranged under the top plate are lit on the front side of a plurality of heating parts (cooking parts) arranged on the top plate to obtain a high temperature. A high-temperature display unit that displays the status is provided, and the lighting and extinguishing of the LED of the display unit is controlled according to the detection temperature of the temperature sensor arranged in each heating unit. An electromagnetic cooker has been proposed in which the number of lights increases as the temperature rises when the LED is turned off and the temperature is higher than that.

In this way, when the temperature detected by the temperature sensor is equal to or higher than the predetermined temperature, the high temperature display unit located near the heating unit emits light to call attention, and the lighting state is changed according to the degree of high temperature. By adopting it, the user can easily grasp the temperature state of the top plate, making it easier to use the electromagnetic cooker safely.

Further, in Japanese Patent Application Laid-Open No. 2003-142245, each of a plurality of heating units is provided with an optical sign display unit for notifying the operating state of the heat source by lighting, and the temperature detected by the temperature sensor arranged in each heat source is determined in advance. An electromagnetic cooker equipped with one high-temperature display unit that displays a high temperature when the temperature reaches a set temperature or higher has also been proposed, and an optical sign display unit when the temperature sensor detects that the temperature exceeds the set temperature. By turning on both the high temperature display unit and the high temperature display unit, it is easier to recognize the display of the high temperature portion.

Further, in the above-mentioned electromagnetic cooker, even after the power switch is turned off after the operation of the heating unit is completed, if the top plate has a high temperature of a predetermined temperature or higher, the high temperature display is continued and the power is turned off. Even after this, we continue to call attention not to touch the hot top plate.

However, in the conventional electromagnetic cooker equipped with the high temperature display function including the above-mentioned prior art, the high temperature display unit is determined by the control means based on the detection temperature of the temperature sensor arranged in each heating unit. Since it has a complicated configuration of controlling the light emission of the electromagnetic cooker, there is a drawback that the manufacturing cost of the electromagnetic cooker tends to increase.

Further, since the high temperature display unit is arranged in such a manner that its existence can be recognized on the top plate even when it does not emit light, it is easy to spoil the aesthetic appearance and design of the top plate in the electromagnetic cooker. Further, since the high temperature display unit is arranged only on the side where the operating means of the heating unit is arranged, in the case of the tabletop electromagnetic cooker, there is a possibility that there are people all around it. In some places where it was difficult to recognize the high temperature display, it was difficult for the high temperature alert to function.

Japanese Unexamined Patent Publication No. 5-52354 Japanese Unexamined Patent Publication No. 2003-142245

The present invention is intended to solve the above problems, and an object of the present invention is to make it easy to recognize the high temperature state of the top plate of the electromagnetic cooker without deteriorating the aesthetic appearance and increasing the cost. There is.

Therefore, in the present invention, an electromagnetic induction type heating coil is provided under the top plate to heat a cooking utensil placed on the top plate, and at least a part of the upper surface of the top plate is predetermined. In an electromagnetic cooker in which a high temperature display unit indicating that the temperature is higher than the temperature is arranged at a predetermined position on the top plate, the high temperature display unit is made of a translucent glass top plate having a predetermined color. By turning on the LED arranged below, the LED light passes through the top plate and emits light in a state where it can be seen from the outside, and the high temperature state is displayed.

In this way, by adopting the method of lighting the LED arranged under the translucent glass top plate to display the high temperature, the top plate is made of translucent glass under the normal state of safe temperature. As a result, the parts that exhibit the high-temperature display function, such as the LEDs placed below the top plate, are difficult to see from the outside, and the top plate with a neat appearance is realized, making it easier to ensure the aesthetics of the electromagnetic cooker. When the top plate becomes dangerously high temperature, the LED lights up and the high temperature display part emits light while passing through the top plate, and the warning display is clearly displayed, so the top plate is in a high temperature state. It becomes easy to recognize that there is.

Further, in this electromagnetic cooker, the high temperature display unit is supposed to display the high temperature state at least for a preset time from the time when the heating operation is completed, and even if the main power is turned off before the set time elapses. If the above display is continued, the high temperature display function can be realized at a low cost by a simple configuration that does not use the temperature data detected by the temperature sensor, and safety even after the main power is turned off. It will be easy to secure.

Further, in the above-mentioned electromagnetic cooker, the upper surface of the top plate at the position of the high temperature display portion maintains the brightness and color tone substantially equal to the color arrangement of the upper surface of the top plate below the set temperature and becomes colorless reversibly above the set temperature. It is provided with a temperature-indicating portion coated with a temperature-indicating paint, and this temperature-indicating portion limits the amount of LED light transmitted from below by maintaining a colored state when the temperature of the top surface of the top plate at that position is lower than the set temperature. If the feature is that the color becomes colorless above the set temperature and the amount of permeation is increased, the actual temperature change on the upper surface of the top plate can be displayed in detail without spoiling the aesthetic appearance of the top plate. It will be possible.

In this case, the high-temperature display unit is provided with a plurality of types of temperature-indicating portions coated with different temperature-indicating paints, and the transmission state of the LED light is partially changed according to the change in the top surface temperature of the top plate. However, if the feature is that the temperature change on the upper surface of the top plate can be displayed step by step, the user can recognize the temperature change status on the upper surface of the top plate in more detail. It will be safe and easy to use.

Furthermore, in the above-mentioned electromagnetic cooker, one or more characters for calling attention, which are non-translucent and have a brightness equal to or lower than the color scheme of the top plate surface, are displayed on the high temperature display unit. If the character is displayed in a state in which the characters can be recognized from the outside in a state where the LED light is transmitted through the top plate and the high temperature display unit is emitting light, the user can use the top plate. It becomes easier to recognize the high temperature state of.

In addition, the above-mentioned electromagnetic cooker is a tabletop type having one heating portion and the top plate having a substantially square shape in a plan view, and the high temperature display portion surrounds the heating portion. If each is arranged along one side side, it becomes easy to recognize the high temperature state of the top plate from all directions.

According to the present invention in which a high temperature display is performed by lighting an LED arranged below a semi-transparent glass top plate, it is easy to recognize the high temperature state of the top plate without deteriorating the aesthetic appearance and increasing the cost. It becomes a thing.

It is a top view of the electromagnetic cooker which is an embodiment of this invention. It is an enlarged vertical cross-sectional partial view which shows the detail of the high temperature display part of the electromagnetic cooker of FIG. It is a plane partial view which shows an example of the high temperature display part of FIG. 2, (A) is a safe normal temperature state, (B) is a dangerous high temperature state. It is a vertical cross-sectional partial view which shows the application example of the high temperature display part of FIG. It is a plane partial view which shows an example of the high temperature display part of FIG. 4, (A) is a state which a heating part is 100 degreeC, (B) is a state which a heating part is lowered to 60 degreeC A state in which the temperature is lowered to 45 ° C., and (D) is a state in which the heating portion is lowered to 25 ° C. It is a top view which shows the modification of the electromagnetic cooker of FIG. It is a top view which shows the application example of the electromagnetic cooker of FIG. It is an enlarged vertical cross-sectional partial view which shows the detail of the high temperature display part in the electromagnetic cooker of FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

FIG. 1 shows an electromagnetic cooker 1A according to the present embodiment. In this electromagnetic cooker 1A, two heating portions 10a and 10b in which an electromagnetic induction type heating coil (not shown) is arranged under a heat-resistant glass top plate 10 to heat a cooking utensil placed on the top plate 10 and a ceiling. It is a thin, two-port, thin cooking utensil equipped with an operation unit 14 arranged flush with this on the front side of the plate 10.

Further, in the electromagnetic cooker 1A, the user touches the top plate 10 by indicating that the upper surface of the top plate 10 is in a high temperature state equal to or higher than a predetermined temperature at and near the positions of the heating portions 10a and 10b. High-temperature display units 7a and 7b that call attention so as not to cause burns are arranged at positions close to the heating units 10a and 10b on the top plate 10.

As shown in the vertical cross-sectional partial view of FIG. 2, the high temperature display units 7a and 7b are visually observed from the outside by lighting a plurality of LEDs 150 of the illuminating body 15 arranged under the top plate 10 made of translucent glass. It has a function of emitting light in a possible state and indicating that the upper surface of the top plate 10 in the vicinity of the positions of the heating portions 10a and 10b adjacent to the heating portions 10a and 10b is in a high temperature state. It is the first characteristic part of the invention.

In the present embodiment, it is assumed that the top plate 10 is made of translucent glass (heat-resistant glass) which is a dark color system such as black or dark brown and whose opposite side is usually difficult to see through, and is below the top plate 10. A notch 121 is formed in the support plate 12 that supports the support plate 12 in accordance with the position and shape of the high-temperature display portions 7a and 7b having a rectangular shape in a plan view. , 150, 150 are arranged side by side, and the letters 101 for calling attention with a paint that is non-transparent and has a brightness equal to or less than the color scheme of the top plate 10 on the surface of the top plate 10 that becomes the high temperature display units 7a and 7b. , 102, 103, 104, 105 are displayed.

FIG. 3 shows a plan view state of the high temperature display unit 7a in the present embodiment. FIG. 3A shows a normal state in which the top plate 10 has a safe temperature, and FIG. 3B shows a dangerous state in the top plate 10. It shows a high temperature condition. As shown in FIG. (A), since the top plate 10 is a dark-colored translucent heat-resistant glass, the rectangular notch 121 of the support plate 12 in the high-temperature display portion 7a and the LEDs 150 and 150 arranged below the cutout portion 121 are provided. , 150, 150 are almost invisible from above, and the letters 101, 102, 103, 104, 105 provided on the uppermost surface are also non-translucent and have a brightness such as black, which is substantially equal to the color scheme on the surface of the top plate 10. -Since it is displayed with paint that becomes a color tone, it is almost inconspicuous.

Then, when the LED 150 is turned on on the back side of the top plate 10, the LED light is transmitted through the notch portion 121 and the translucent top plate 10 as shown in FIG. As the whole of the light is emitted, the display of "high temperature caution" by the letters 101, 102, 103, 104, 105 provided in that part emerges and becomes visible, and the user knows that the top plate 10 is hot. It clearly calls attention to.

In this way, by adopting a method of lighting the LED 150 arranged below the top plate 10 made of translucent glass to display a high temperature, the top plate 10 is translucent when the top plate 10 is at a safe temperature. This makes it difficult for the LED 150 and the like in the extinguished state below it to be visually recognized from the outside, so that the high temperature display units 10a and 10b become the top plate 10 having an inconspicuous and neat appearance. It is easy to secure.

On the other hand, in a high temperature state where the top plate 10 may be burned, the LED 150 arranged under the top plate 10 lights up and the high temperature display units 10a and 10b emit light to call attention. ing. As described above, the electromagnetic cooker 1A of the present embodiment is low-cost due to its simple configuration, but can be easily recognized when the top plate 10 is in a high temperature state.

As a method for lighting the LED 150 on the high temperature display units 7a and 7b when the positions of the heating units 10a and 10b of the top plate 10 and the vicinity thereof are in a dangerous high temperature state, the heating unit is the same as in the conventional example. Based on the detection temperature of the temperature sensors arranged in 10a and 10b, while the control means detects a temperature range in a predetermined range, the LED 150 of the corresponding high temperature display units 10a and 10b is turned on, and the heating unit 10a It is recommended that the high temperature display units 10a and 10b be made to emit light in a blinking state while the heating operation is being performed, and that the high temperature display units 10a and 10b are uniformly lit for a predetermined time after the heating operation is completed. By doing so, the detection by the temperature sensor and the simple configuration without using a complicated control system are sufficient, and a reliable high temperature display function can be realized at a low cost.

Further, in the case of the method of lighting for a predetermined time even after the heating operation is completed, the top surface temperature of the top plate 10 of the heating portions 10a and 10b can be continuously measured and touched while actually heating and cooking in various situations. For example, the time to reach 40 ° C or less without worrying about burns is obtained, and the lighting time (for example, 15 minutes) is determined by multiplying by a predetermined safety factor, the time is set in advance, and the predetermined timekeeping means is used. It is assumed that the LED 150 is turned on and off. Further, in this case, even when the main power is turned off from the viewpoint of ensuring safety, it is preferable to continue lighting before the lapse of the set time.

FIG. 4 shows a high temperature display unit 8a as an application example of the high temperature display unit 7a of FIG. In this example, on the upper surface of the top plate 10 at the position where the high temperature display unit 8a is formed, the brightness and color tone that are substantially equal to the color scheme of the upper surface of the top plate 10 are maintained below the set temperature and reversibly become colorless (transparent) above the set temperature. It is characterized in that it is provided with temperature indicating portions 802 and 803 as portions to which the temperature indicating paint is applied.

Further, in the high temperature display unit 8a, a transparent adhesive sheet 800 having excellent heat resistance is formed into a rectangular tape shape according to the shape and size of the high temperature display unit 8a, and a temperature indicating paint having a different set temperature is applied. A temperature indicating tape 80 is provided by providing temperature indicating portions 802, 803 and transparent portions 801, 804 on both left and right ends thereof, and the temperature indicating tape 80 is used to pass LED light through the cutout portion 121. It is attached so as to cover the upper part, and on the temperature indicating portions 802 and 803, the same cautionary characters as the above-mentioned high temperature display unit 7a are displayed on the upper surface thereof.

In the high temperature display unit 8a having such a configuration, when the upper surface temperature of the top plate 10 at that position is lower than the temperature preset by the blending of the temperature indicating paint, the LED light from below the temperature indicating portion 802,803 It is possible to limit the amount of light transmitted through the portion to reduce the amount of light emitted in that portion, and to transmit most of the LED light above the set temperature to increase the amount of light emitted in that portion. It is possible to display the actual change in the top surface temperature of the top plate 10 in detail without spoiling the aesthetic appearance.

Further, in the high temperature display unit 8a, since the temperature indicating portions 802 and 803 are coated with the temperature indicating paints having different set temperatures, the LED light transmission state is partially changed according to the change in the upper surface temperature of the top plate 10. The change in the top surface temperature can be displayed stepwise while changing. As a result, the user can recognize the state of the temperature change on the upper surface of the top plate 10 in more detail, and it is easier to ensure the safety thereof.

FIG. 5 is a partial plan view showing an example of the operating state of the high temperature display unit 8a shown in FIG. 4 step by step. In an electromagnetic cooker using electromagnetic induction heating, it is known that the temperature rise of the top plate due to the heating operation is relatively small in the surrounding portion as compared with the heating portion on which the cooking utensil is placed. However, when a certain amount of time has passed, the temperature of the peripheral side of the heating part also rises to some extent due to the heat conduction of the top plate, and the decrease in temperature also has a certain correlation with the temperature decrease in the heating part. Therefore, the set temperature of the temperature indicating portion in the high temperature display unit can be determined by examining the correlation using an actual machine.

With reference to FIG. (A), in this example, the set temperature of the temperature indicating portion 802 is 40 ° C. and the set temperature of the temperature indicating portion 803 is 30 ° C. Assuming that the display position of the high temperature display unit 8a is 50 ° C. when the heating position by the portion 10a is 100 ° C., both the temperature indicating portions 802 and 803 become colorless, and all the transparent portions 801.804 on both ends are included. The high temperature display unit 8a is made to emit light while the portion transmits the LED light from below, and the characters "Caution for high temperature" are clearly displayed.

After that, as time elapses and the heating position drops to 60 ° C. and the display position 35 ° C. as shown in FIG. As the color scheme of the top plate 10 became closer to that of the top plate 10, the word "high temperature" became inconspicuous, and only the word "caution" of the temperature indicating part 803 was conspicuously displayed, and the temperature of the top plate 10 dropped slightly. Will be able to recognize.

After that, when the heating position is lowered to 45 ° C. and the display position is lowered to 25 ° C. as shown in FIG. At the same time, the light emitting area is significantly reduced, so that it can be recognized that the temperature of the top plate 10 has been further lowered. After that, as shown in FIG. (D), after the set 15 minutes have passed after the heating operation is completed, the heating position is 25 ° C. and it is safe to touch the top plate 10. The LED 150 is turned off, and the high temperature display unit 8a has almost the same color scheme as that of the top plate 10, and is in a state of being almost inconspicuous.

FIG. 6 shows an electromagnetic cooker 1B as a modification of the electromagnetic cooker 1A of FIG. The electromagnetic cooker 1B has one heating unit 11a and is a tabletop type having a square top plate 11, and has an operation unit 15 in front of the top plate 11. Further, the square top plate 11 is characterized in that the high temperature display portions 8c, 8d, 8e, and 8f are arranged along the four sides of the square so as to surround the heating portion 11a. It is easy to recognize the high temperature state of the top plate from the direction of.

FIG. 7 shows an electromagnetic cooker 1C as an application example of the electromagnetic cooker 1B of FIG. In this electromagnetic cooker 1C, the high temperature display unit 8c on the operation unit 15 side remains as it is, but the remaining high temperature display units 9a, 9b, 9c have high brightness as shown in the vertical cross-sectional partial view of FIG. On the upper surface of a light-colored adhesive sheet 900 cut into a rectangular tape, from the left side of the figure, the temperature indicator 901 with the temperature indicator set at 25 ° C, the temperature indicator 902 with the temperature indicator set at 40 ° C, and the temperature indicator paint set at 30 ° C. The temperature indicating portion 903 and the temperature indicating portion 904 made of the temperature indicating paint set at 25 ° C. are arranged side by side, and the temperature indicating tape 90 is attached.

By attaching such a temperature indicating tape 90 to the upper surface of the top plate 11 and arranging it, the high temperature display portions 9a, 9b, 9c are all darkened when the temperature at the position is less than 25 ° C. While covering all the bright ground color (white, orange, etc., or fluorescent color) on the surface of the adhesive sheet 900, it blends into the color scheme of the surrounding top plate 11 to make it inconspicuous, and the temperature at that position is 25 ° C or higher and 30 ° C. As described above, as the temperature rises to 40 ° C. or higher, the display area of bright colors is expanded and the characters provided on the uppermost surface become more conspicuous, so that the function as a high temperature display is fully exhibited.

Further, in this way, the other three high-temperature display units 9a, 9b, 9c of the high-temperature display unit 8c by the method of controlling the lighting of the LED display the temperature change status due to the temperature-indicating paint without using the LED. By adopting the configuration in which the 90 is attached, the manufacturing cost can be significantly reduced as compared with the above-mentioned electromagnetic cooker 1B.

As described above, with respect to the electromagnetic cooker, according to the present invention, it is easy to recognize the high temperature state of the top plate without deteriorating the aesthetic appearance and increasing the cost.

1A, 1B, 1C electromagnetic cooker, 7a, 7b, 8a, 8c, 8d, 8e, 8f, 9a, 9b, 9c high temperature display, 10,11 top plate, 101,102,103,104 characters, 150 LED, 803,804,901,902,903,904 Temperature indicator

Claims (6)

An electromagnetic induction type heating coil is provided under the top plate to provide a heating unit for heating a cooking utensil placed on the top plate, and at least a part of the upper surface of the top plate is at a predetermined temperature or higher. In an electromagnetic cooker in which a high temperature display unit for displaying a high temperature state is arranged at a predetermined position on the top plate, the high temperature display unit is under the top plate made of translucent glass having a predetermined color. The electromagnetic cooker is characterized in that when the LED arranged in the above is turned on, the LED light passes through the top plate and emits light in a state where it can be visually recognized from the outside while displaying the high temperature state. The high temperature display unit is supposed to display the high temperature state at least for a preset time from the time when the heating operation is completed, and continues the display even if the main power is turned off before the lapse of the set time. The electromagnetic cooker according to claim 1. On the upper surface of the top plate at the position of the high temperature display unit, the brightness and color tone are maintained at a temperature lower than the set temperature, which is substantially equal to the color arrangement of the upper surface of the top plate, and the temperature is reversibly colorless above the set temperature. It is provided with a temperature indicating portion formed by applying a paint, and the temperature indicating portion maintains a colored state when the upper surface temperature of the top plate at that position is lower than the set temperature and transmits the LED light from below. The electromagnetic cooker according to claim 1 or 2, wherein the electromagnetic cooker is limited and becomes colorless at a temperature equal to or higher than the set temperature to increase the permeation amount. The high-temperature display unit includes a plurality of types of temperature-indicating portions coated with the temperature-indicating paint having different set temperatures, and partially changes the transmission state of the LED light according to a temperature change on the upper surface of the top plate. The electromagnetic cooker according to claim 3, wherein the temperature change can be displayed stepwise while being changed. On the high temperature display unit, one or more characters for calling attention, which are non-translucent and consist of a paint having a brightness equal to or lower than the color scheme of the surface of the top plate, are displayed, and the LED light is the top plate. The electromagnetic cooker according to claim 1, 2, 3 or 4, wherein the characters are displayed in a state in which the characters can be recognized from the outside in a state where the high temperature display unit emits light through the light. .. It is a tabletop type having one heating portion and the top plate having a substantially square shape in a plan view, and the high temperature display portion surrounds the heating portion along four side surfaces of the top plate. The electromagnetic cooker according to claim 1, 2, 3, 4 or 5, wherein each is arranged.

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