JPH11101441A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a baby and a child from getting a burn upon touching a heat resistant glass when the temperature thereof is very, high immediately after heating is completed. SOLUTION: In case heating is stopped after heating an object to be heated and the object removed, a heating cooker comprises a sound 30 or a lamp for alerting a state wherein a heat resistant glass 2 exceeds a specified temperature, and a temperature detecting means 5 as a means for judging the presence of the object to be heated. According to this arrangement, it is possible to prevent an accidental burn while the user of the heating cooker leaves the same and to caution a baby and the like from approaching the heating cooker. In addition, the temperature measuring means 5 offers a high accuracy because it directly measures a temperature of the heat resistant glass 2. The temperature measuring means 5 can also be used as a means for controlling the temperature of the interior of the object to be heated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device for heating an object to be heated via a heat-resistant glass directly above by a lamp heater provided on a stove and emitting infrared rays. The present invention relates to a heating cooker in which a temperature sensor determines whether or not a heated object has been removed from a heat-resistant glass.

[0002]

[Prior art]

(1) Conventional example related to temperature sensor Conventionally, this type of heating cooker is disclosed in Japanese Patent Laid-Open No. Hei 4-23601.
No. 6 publication. The configuration will be described with reference to FIGS.

Conventionally, a stove section 3 is provided below a heat-resistant glass 2 on which an object to be heated 1 is placed, and the stove section 3 has a lamp heater 4 and a temperature sensor 5 in contact with a lower portion of the heat-resistant glass 2. Is built-in. The stove part 3 has a dish-shaped vertical cross section having an open top and side and bottom surfaces, and is contacted with a spring spring 6 directly below the heat-resistant glass 2, and the outer wall 7 is made of a metal material. A ring-shaped heat insulating material A8 and a donut-shaped heat insulating material B9 are provided along the inner surface of the outer wall 7.
And a cylindrical portion 10 at the center of the outer wall 7. Further, a ring-shaped heat insulating material C11 is provided inside the cylindrical portion 10 (on the side of the lamp heater), and a heat insulating material D12 is provided on the upper surface of the heat insulating material C11 to eliminate a gap between the heat-resistant glass 2 and the heat insulating material C11. Things.

When heating is started by the above configuration, the lamp heater 4 inside the stove section 3 generates heat, and the heat-resistant glass 2 just above the stove section 3 is heated.
, And the object to be heated 1 such as a pan is heated by conduction and radiation.

In addition, a linear expansion type temperature sensor 13 different from the temperature sensor 5 is provided near the lamp heater 4 inside the stove section 3, and when the temperature reaches a set temperature, the linear expansion is performed and the micro switch 14 is operated to operate the heating means. Lamp heater 4 as
The power of the heat-resistant glass 2 is controlled by lowering the power (or stopping the heating) and returning the power to the full power when the temperature falls below.
Further, the safety of the lamp heater 4 (reduction of failures and extension of life) is improved.

Further, a heating start button 16 and a heating stop button 17 are provided as the operation unit 15.

(2) Conventional example relating to high temperature display Conventionally, this type of heating cooker 1 is disclosed in Japanese Unexamined Utility Model Publication No. 3-7290.
There is an official gazette. The configuration will be described with reference to FIG.

In other words, attention is paid to the high temperature display of the heat-resistant glass 5 so as to draw attention so as not to touch the hand.

More specifically, although the configuration of the stove section 3 is slightly different, it is almost the same as the conventional example of FIG. Then, immediately below the heat-resistant glass 5, the lamp case 1
A display lamp 19 is provided inside the display 8 for displaying a high temperature.

If the temperature of the heat-resistant glass 2 is high after the heating, the display lamp 19 is operated to notify that the temperature is high.

Further, as a control of the display lamp 19, a bar-shaped thermal expansion type temperature sensor 13 is provided inside the stove portion 3 immediately below the heat resistant glass 2 in parallel with the heat resistant glass 2 (not in contact with the heat resistant glass 2). The micro switch 14 is operated by expansion and contraction, and the display lamp 19 blinks when the temperature of the heat-resistant glass 2 is higher than the predetermined temperature, and is stopped when the temperature of the heat-resistant glass 2 becomes lower than the predetermined temperature.

[0012]

In this type of cooking device, the heat-resistant glass has a high temperature immediately after heating. Therefore, when the object to be heated is still placed on the heat-resistant glass, the heat-resistant glass is not touched, but care must be taken when the object to be heated is removed from the heat-resistant glass.

(1) Problems in Displaying High Temperature The conventional cooking device shown in FIGS. 7 and 8 displays a high temperature by a display lamp 19 provided immediately below the heat-resistant glass 2 and draws attention. Although it is possible, after heating, the object to be heated 1 is removed from the heating top surface 2 and is placed in another place (for example, a kitchen).
The display lamp 19 goes out of sight,
In some cases, you may stay away from the cooking device. During this time, when the infant approaches the high-temperature cooking device, there is a problem that the child forgets to pay attention to this.

(2) Problems as Means for Displaying High Temperature In the conventional cooking device shown in FIGS. 7 and 8, the stove section 3 directly below the heat-resistant glass 2 is used to control the display lamp 19.
A heat expansion type temperature sensor 13 in the form of a rod is provided in parallel with the heat resistant glass 2 and the micro switch 14 is operated by expansion and contraction. If the temperature of the heat resistant glass 2 is higher than a predetermined temperature, the display lamp 19 blinks and becomes lower. For example, the display lamp 19 is stopped. However, the temperature is indirectly detected with respect to the heat-resistant glass 2 (not in contact with the heat-resistant glass), and the response is not good. Further, the temperature sensor 13 cannot determine the presence or absence of the object 1 to be heated on the heat resistant glass 2.

[0015]

In order to solve the above-mentioned problems, the present invention directly detects the temperature of the heat-resistant glass with a temperature sensor to control the temperature in the object to be heated, and the temperature of the heat-resistant glass exceeds a predetermined temperature. The time is notified by sound or lamp. Further, after the heating stop operation, a change in the temperature of the temperature sensor is detected to determine whether or not the object to be heated has been removed from the heat-resistant glass.

According to the present invention, the temperature sensor determines whether or not the object to be heated has been removed from the heat-resistant glass and, when the temperature of the heat-resistant glass is higher than a predetermined temperature, gives a sound or a lamp. Attention can be raised,
A warning sound indicates that the heat-resistant glass is hot even if it is farther from the cooking device, so if a non-discriminating infant approaches the cooking device, a sensible person (for example, parent) should be careful. be able to.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to solve the above-mentioned problems, the present invention provides a heat-resistant glass on which an object to be heated is placed, and a method of heating the object to be heated via the heat-resistant glass provided below the heat-resistant glass. A heating unit and a control unit, wherein the control unit performs a heating stop operation of the operation unit after heating and removes the object to be heated, and the heat-resistant glass is higher than a predetermined temperature and has a high temperature. In a heating cooker having a configuration in which a sound or a lamp is used to notify the temperature, the temperature of the heat-resistant glass is measured by the temperature measurement unit and the presence or absence of the object to be heated is determined.

Thus, the temperature measuring means directly measures the temperature of the heat-resistant glass, so that the accuracy is high. Further, the temperature measuring means controls the temperature of the contents of the object to be heated and also serves as the means for judging the presence or absence of the object to be heated. It can be realized with a simple configuration.

Further, the control means performs a heating stop operation of the operation section after the heating, and inputs in advance the temperature falling gradient of the temperature measurement means when the object to be heated is mounted on the control means, and When the heated object is removed, the temperature measuring means detects the temperature falling gradient and calculates the difference to determine whether the object to be heated has been removed. It has a configuration that measures and determines the presence / absence of an object to be heated.

In addition, the accuracy and the convenience are good.
It has three functions and is of great value.

[0021]

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

(Embodiment 1) FIG. 1 is an external view of a heating cooker according to Embodiment 1 of the present invention. FIG. 2 is a sectional view of the cooking device. FIG. 3 is an external view of a stove section of the cooking device. FIG. 4 is a control block diagram of the cooking device.

The means for judging the presence or absence of an object to be heated is a means for detecting a falling gradient of a temperature sensor 5 as a temperature measuring means after a heating stop operation and judging whether or not the object to be heated 1 is placed on the heat resistant glass 2. It is.

In the figure, a heat-resistant glass 2 on which an object to be heated 1 is placed and which transmits infrared rays is integrated with an upper case 20 by an adhesive 21 and a lower case 23 having a stove section 3 and a cooling fan 22 built therein. Are fixed with screws 24 and connected.

The stove section 3 is provided below the heat-resistant glass 2 which transmits infrared rays. The outer wall 7 has an open top and a parabolic shape centered on a lamp heater 4 for heating the bottom face with two infrared rays. At the same time, an aluminum material having a high reflectance to infrared rays is coated with sodium silicate 25 on the inner wall surface. Furthermore, the stove section 3 is made of heat-resistant glass 2
The bottom surface of the central portion is locally raised as a raised bottom 26, and an opening 27 is provided in the raised bottom 26. The temperature sensor 5 faces the opening 27 of the raised bottom 26 and is urged by a spring B28 so as to contact the heat resistant glass 2. A heating start key 16 is provided on the side of the upper case 20.
And an operation unit 15 including a heating stop key 17 and the like. 29 is a microcomputer. In this embodiment, the diameter of the heat-resistant glass 2 is larger than the diameter of the stove portion 3.

The operation of the configuration shown in FIGS. 1 to 3 will be described. When the heating cooker presses the heating start button 16 to start energization, the plurality of lamp heaters 4 inside the stove section 3 are heated.
Generates heat, heats the heat-resistant glass 2 immediately above, and transmits infrared rays to heat the object 1 such as a pan by conduction and radiation. At this time, the temperature of the heat-resistant glass 2 is 350 ° C. to 450 ° C.
° C. When the heating is completed, the plurality of lamp heaters 4 in the stove unit 3 are turned off by pressing the heating stop button 17.
However, the operation function of the temperature sensor 5 remains ON.

In the above configuration, the temperature sensor 5 has the following 2
It has two functions. (1) Detecting the temperature of the heat-resistant glass 2 to control the temperature inside the object 1 to be heated (2) Detecting the temperature of the heat-resistant glass 2 and, when the temperature of the heat-resistant glass is higher than a predetermined temperature, the sound by the buzzer 30 and the lamp 31 , And control to stop any of the notifications if the following occurs. A heat suppressor 32 is provided between the raised bottom 26 of the stove 3 and the heat-resistant glass 2 so as to appropriately apply heat from the lamp heater 4 to the temperature sensor 5.

In the present invention, a third function is added. In other words, as shown in FIG. 5A, the result of measuring the temperature falling gradient of the temperature sensor 5 when the heating stop button 17 of the operation unit 15 is pressed after the heating and the object 1 to be heated is still placed thereon is obtained. It is input to the microcomputer 29 in advance. Next, as shown in FIG.
The temperature falling gradient is detected by the temperature sensor 5 when is removed. At this time, if it is the same as that previously input to the microcomputer 29, it is determined that the object to be heated 1 is on the heat resistant glass 2 and no warning is given by sound. On the other hand, if the input is different from the input to the microcomputer 29 in advance, it is determined that the object to be heated 1 has been removed from the heat resistant glass 2 and a warning is issued by sound.

Further, immediately after heating, there is not much difference in the temperature falling gradient when the object to be heated 1 is placed and removed, so that the heating stop button 1 of the operation unit 15 after heating is performed.
Pressing 7 gives a sound warning from 1 minute to 1 minute 30 seconds after that. Thereafter, the above control is performed. According to the results of the monitor test and the like, there are few cases in which the object to be heated is removed immediately after the heating of the pan, grilled meat, etc., which is based on data obtained after a short break.

That is, when the heating stop button 17 of the operation unit 15 is pressed after the heating and the object 1 is removed and the temperature is higher than a predetermined temperature, a warning is sounded if the temperature is equal to or higher than the predetermined temperature. This is realized by a temperature sensor 5 as a means.

If the alarm is given while the warning sound 30 is being emitted, when the temperature sensor 5 detects that the temperature of the heat-resistant glass 5 has dropped to about 50 ° C., the buzzer 30 of the control circuit is turned off. The warning will be terminated. This temperature is such that even if the hand is touched for a short time, it does not cause a burn and is felt hot.

The lamp 31 has the same control as the buzzer 30. As described above, according to the first embodiment, (1) the temperature sensor as the temperature measuring means detects the temperature of the heat-resistant glass above and below the predetermined temperature and also serves as the object to be heated presence determining means. Is extremely simple. (2)
One temperature sensor has three functions and can be realized at low cost. (3) When the heating stop operation is performed after heating and the object to be heated is removed, the heat-resistant glass is warned by a sound that the temperature is high, so that attention can be given, and even if it is separated from the cooking device, it will be heard inadvertently. Becomes

[0033]

As described above, according to the heating cooker of the present invention, the following effects can be obtained.

(1) In a case where the heating operation of the operation section is stopped after the heating and the object to be heated is removed, and the heat-resistant glass exceeds a predetermined temperature, a warning is given by sound. It is easy to use and can prevent inadvertently leaving the cooking device. Further, when an unseparable infant approaches the cooking device, a person who is sedentary (eg, a parent) can be alert.

(2) The temperature falling gradient of the temperature measuring means is input to the control means in advance, and when the object to be heated is removed, the temperature measuring means detects the temperature falling gradient and detects the temperature falling gradient. This is to determine the presence or absence, can be realized by a simple configuration, has three functions, and is of great value.

[Brief description of the drawings]

FIG. 1 is an external view of a heating cooker according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the cooking device.

FIG. 3 is an external view of a stove section of the cooking device.

FIG. 4 is a control circuit block diagram of the cooking device.

FIG. 5 is a characteristic diagram of a temperature sensor of the cooking device according to the first embodiment of the present invention.

FIG. 6 is an external view of a conventional heating cooker.

FIG. 7 is a sectional view of the cooking device.

FIG. 8 is a cross-sectional view of another conventional cooking device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 object to be heated 2 heat-resistant glass 3 stove section (heating means) 5 temperature sensor (temperature measuring means) 29 microcomputer (control means) 30 buzzer (warning sound generating means) 31 lamp

Claims (2)

[Claims] A heat-resistant glass on which an object to be heated is placed; heating means provided below the heat-resistant glass for heating the object to be heated via the heat-resistant glass; The means is a case where the heating unit performs a heating stop operation of the operation unit after the heating and removes the object to be heated, and when the heat-resistant glass exceeds a predetermined temperature, a warning sound generating means and a lamp are used to notify the heating cooking. A heating cooker as a heating object presence / absence determining means for measuring the temperature of the heat-resistant glass by a temperature measuring means and determining the presence / absence of the heating object. The control means performs a heating stop operation of the operation unit after the heating and inputs a temperature falling gradient of the temperature measurement means when the object to be heated is mounted on the control means in advance,
When the object to be heated is removed, the temperature measuring unit detects the temperature falling gradient and calculates the difference to determine whether or not the object to be heated is removed. The heating cooker according to claim 1, wherein the cooking device includes a heated object presence / absence determination unit that measures a temperature and determines the presence / absence of a heated object.