JP3713878B2 - Cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lamp heater type cooking device that forms a heating top surface with heat-resistant glass and emits infrared rays.
[0002]
[Prior art]
Conventionally, as this type of cooking device 1, there is Japanese Utility Model Publication No. 3-7290. The configuration will be described with reference to FIGS.
[0003]
When the object to be heated 2 is placed, the high-temperature heating zone 4 of the heat-resistant glass 3 is not touched, but when the object to be heated 2 is removed immediately after heating, the high-temperature heating zone 4 of the heat-resistant glass 3 is touched. In order to call attention such as not touching. Specifically, the heating top surface 5 is formed of heat-resistant glass 3 that transmits infrared rays, has a heating zone 4 and a non-heating zone 6, and is integrated with the upper surface case 7 and the adhesive 8. The lower surface case 9 includes a heating unit 10 supported by a spring spring 11 in pressure contact with the back surface of the heat-resistant glass 3 and is fixed to the upper surface case 7 with screws 12.
[0004]
The heating unit 10 is provided immediately below the heating zone 4 on the heating top surface 5, and a plurality of lamp heaters 13 that radiate infrared rays are arranged in parallel inside, and the upper side is the heat-resistant glass 3 on the heating top surface 5. The upper case 7 is provided with a power switch 15 and a heating part on / off switch 16 as the operation part 14. Then, a display lamp 18 is provided inside the lamp case 17 immediately below the heat-resistant glass 3 to display at a high temperature.
[0005]
Further, the operation of the heating cooker 1 is energized by turning on the power switch 15, and by turning on the heating section on / off switch 16, the plurality of lamp heaters 13 in the heating section 10 are energized to generate heat. The heat-resistant glass 3 positioned immediately above is permeated to heat the heated object 2 such as a pan by spraying and conduction. If the heat-resistant glass 3 is hot after heating, the display lamp 18 operates to inform the high temperature. Is.
[0006]
However, although the said conventional cooking device 1 displays high temperature with the display lamp 18 provided just under the non-heating zone 6 of the heat-resistant glass 3, although it can call attention, the hottest part is the to-be-heated object 2 It is the heating zone 4 directly below and is not optimal as a display location.
[0007]
Further, when the object to be heated 2 is removed from the heating top surface 5 and carried to another place (for example, kitchen), the display lamp 18 disappears from the field of view by being accidentally left away from the heating cooker 1. There is. During this time, when the infant approaches the cooking device 1 whose heating top surface 5 is at a high temperature, there is a problem such as forgetting to pay attention to this.
[0008]
Prior to the present invention, in order to solve the above-mentioned problem, when the heated top surface of the heat-resistant glass on which the heated object is placed when the heated object such as a pan is moved, the light emitting element By detecting that the object to be heated has been removed by the means for determining whether the object to be heated is made up of a light receiving element, and warning the sound with a sound to notify that, the heat-resistant glass can be removed even if it is away from the heating cooker. Since it is known that the temperature is high, an invention has been filed in which an infant can be alerted when approaching.
[0009]
[Problems to be solved by the invention]
However, even in the above invention, since the presence or absence of an object to be heated is detected by the light emitting element and the light receiving element, it is determined that there is an object to be heated when light from the light emitting element is blocked by the object to be heated and does not enter the light receiving element. It was.
[0010]
If it is normal, there is no problem, but if the light emitting element or light receiving element breaks down, the light from the light emitting element does not enter the light receiving element even if there is no object to be heated. There was a problem with no warning.
[0011]
[Means for Solving the Problems]
In the present invention, in order to solve the above-described problem, the control unit determines the validity (failure of the light-emitting element, the light-receiving element, etc.) of the heated object presence / absence determining means composed of the light-emitting element and the light-receiving element, and is invalid (failed) Is one in which the heating function is deactivated.
[0012]
According to the said invention, when a light emitting element, a light receiving element, etc. fail, a heating function can be made into non-operation.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The present invention includes a heat-resistant glass on which an object to be heated is placed, a heating unit that is provided on a stove part below the heat-resistant glass and that heats the object to be heated, and a temperature measuring unit that measures the temperature of the heat-resistant glass, A heating object presence / absence determining means comprising a light emitting element and a light receiving element for determining whether or not the object to be heated is placed on the heat resistant glass; and a warning sound generating means. The effectiveness of the heated object presence / absence determining means is judged and stored, and the validity of the heated object presence / absence determining means at the time of the previous power supply energization stored at the initial stage of power re-energization is checked. The warning sound generating means is configured to emit a warning sound when the object to be heated is removed after the heating is finished and the heat-resistant glass exceeds a predetermined temperature.
[0014]
And because the heat-resistant glass is notified by sound, you can be careful when an indistinguishable infant gets close to the heating cooker, and if the light emitting element or light receiving element breaks down, the heating function is activated. Can be non-operational.
[0015]
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0016]
(Example 1)
FIG. 2 is an external view of the heating cooker 1 according to the first embodiment of the present invention. FIG. 1 is a cross-sectional view of the cooking device.
[0017]
In the figure, the cooking device 1 has a configuration in which an upper case 7 and a lower case 9 are combined. The upper surface case 7 includes a heating top surface 5 that includes the heat-resistant glass 3 on which the object to be heated 2 is placed and forms an upper surface portion, and an operation unit 14 including a power switch 15 and a heating unit on / off switch 16. ing. The lower case 9 is provided below the heat-resistant glass 3 and includes a heating unit 10 including a lamp heater 13 that radiates infrared rays as a heating unit and a temperature sensor 19 as a temperature measurement unit. Inside, a temperature sensor 19 is provided with a spring 20 that works so as to contact the heat-resistant glass 3.
[0018]
In this embodiment, the temperature sensor 19 is provided inside the stepped guide tube 21. Further, the size of the heat-resistant glass 3 is larger than the size of the heating unit 10. Accordingly, the heat-resistant glass 3 includes a heating zone 4 that is directly heated by the heating unit 10 and a non-heating zone 6 that is not directly heated.
[0019]
Further, in the present embodiment, the upper case 7 is provided with a mount portion A22 and a mount portion B23 on the outer periphery of the heat-resistant glass 3 so as to face each other, and the light emitting element 24 is provided inside the mount portion A22 as a heated object presence / absence determining means. Are provided with a light receiving element 25 and a small hole A26 and a small hole B27 for allowing light from the light emitting element to pass through the mount B23.
[0020]
The control unit 28 has a built-in microcomputer (not shown), and controls the light emitting element 24, the light receiving element 25, the temperature sensor 19, the lamp heater 13, the buzzer 29, the error display lamp 30 for notifying the failure of the heating cooker 1, and the like. .
[0021]
The operation of the configuration shown in FIGS. 1 and 2 will be described. The heating cooker 1 is energized by turning on the power switch 15, and by turning on the heating part on / off switch 16, the plurality of lamp heaters 13 in the heating part 10 are energized to generate heat and heat-resistant glass 3 immediately above. Is heated and the heated object 2 such as a pan is heated by conduction and radiation. At this time, the temperature of the heat-resistant glass 3 is 350 ° C. to 450 ° C. although it varies depending on the shape and material of the bottom of the article 2 to be heated. At the end of heating, if the heating section on / off switch 16 is turned off, the plurality of lamp heaters 13 in the heating section 10 are turned off, but the operation functions of the light emitting element 24, the light receiving element 25, the temperature sensor 19 and the control section 28 remain on. It is.
[0022]
Accordingly, when the heating is turned off by turning off the heating section on / off switch 16 and the object 2 is removed from the heating top surface 5, the temperature of the high-temperature heat-resistant glass 3 is detected by the temperature sensor 19, and the light from the light emitting element 24 is a small hole. The light is transmitted through A26 and the light receiving element 25 receives light through the small hole B27, whereby the buzzer 29 is turned on and a warning sound is emitted.
[0023]
If the alarm is made while the warning sound is emitted, when the temperature sensor 19 detects that the temperature of the heat-resistant glass 3 has decreased to 60 ° C. to 75 ° C., the buzzer 29 is turned off to end the warning. It will be. This temperature is a level at which it feels hot without touching even if it is touched for a short time. Usually, it takes about 30 minutes from the end of heating until the temperature of the heat-resistant glass 3 decreases to 60 ° C to 75 ° C.
[0024]
Note that the predetermined temperature at which the warning is stopped is set so as not to exceed any one of 60 to 75 ° C. When the temperature is 75 ° C or higher, it is too hot when touched, and when the temperature is lower than 60 ° C, a warning sound is generated. This is because it takes too much time to stop and becomes impractical. Of course, the temperature is not limited to the case of forced cooling.
[0025]
Further, even if the object to be heated 2 is removed from the heating top surface 5 during heating, a warning sound by the buzzer 29 is not emitted. This is because the plurality of lamp heaters 13 in the heating unit 10 generate heat and emit infrared rays, and thus it is clear that they are in operation. It is for judging. That is, at this time, if a warning sound is emitted in the same manner as described above, the usability deteriorates.
[0026]
Further, when the power supply switch 15 and the heating part on / off switch 16 are turned on and energization is started without placing the object to be heated 2, if the heating part on / off switch 16 is turned off, Similarly, the buzzer 29 is turned on and a warning sound is emitted.
[0027]
Up to now, the warning sound from the buzzer 29 has been described, but it is of course possible to use means such as playing a hot sound or playing a melody.
[0028]
Next, the operation of determining the effectiveness of the heated object presence / absence determining means including the light emitting element 24 and the light receiving element 25 will be described based on the flowchart of FIG.
[0029]
When the power switch 15 is turned on, first, in step 1, the effectiveness of the heated object presence / absence determining means including the light emitting element 24 and the light receiving element 25 is determined. It is determined whether or not the light from the light emitting element 24 is received by the light receiving element 25. If the light is received, it is valid (normal), and the operation from step 2 to step 5 is performed. Since the normal operation has already been described above, it will be omitted.
[0030]
If the light is not received, the light is invalid, and the light emitting element 24, the light receiving element 25, the control unit 28, etc. are out of order. Next, the process proceeds to step 6 to flash the error display lamp 30 to call attention. And even if the heating part on / off switch 16 is turned on in step 7, the lamp heater 13 is not turned on. That is, the heating function does not operate in an invalid (failed) state.
[0031]
However, even if the object to be heated 2 is placed on the heat-resistant glass 3, it does not receive light, so it becomes the same state as the ineffective state. However, once the object to be heated 2 is removed from the heat-resistant glass 3, it can receive light. The process can proceed to step 2 in the valid state.
[0032]
(Example 2)
FIG. 2 is an external view of the cooking device 1 according to the second embodiment of the present invention, as in the first embodiment. FIG. 4 is a cross-sectional view of the heating cooker 1, and the difference from the first embodiment in the configuration is only that the storage element 31 is connected to the control unit 28, and the description of the configuration with the same reference numerals is omitted. Further, the basic operation at normal time is the same as that of the first embodiment, and thus the description thereof is omitted.
[0033]
Next, an operation for determining the effectiveness of the heated object presence / absence determining means including the light emitting element 24 and the light receiving element 25 will be described with reference to the flowchart of FIG.
[0034]
When the power switch 15 is turned on, first, in step 1, the effectiveness of the heated object presence / absence determining means including the light emitting element 24 and the light receiving element 25 at the time of previous power supply is determined. The effectiveness of the heated object presence / absence determining means at the time of the previous power supply is stored in the storage element 31. If effective (normal) is stored in the storage element 31, the process proceeds to step 2 to determine the effectiveness of the heated object presence / absence determining means including the light emitting element 24 and the light receiving element 25. It is determined whether or not the light from the light emitting element 24 is received by the light receiving element 25, and is valid (normal) if it is received even once during the current power supply. The fact that the heated object presence / absence determining means is effective is stored. If the light is not received even once during the current power supply, this is invalid, and it is determined that the light emitting element 24, the light receiving element 25, the control unit 28, etc. are out of order. And it progresses to step 4 and memorize | stores that the to-be-heated object presence / absence determination means is invalid in the memory | storage element 31. FIG. Subsequent steps 5 to 8 are the same as those in the first embodiment, and will be omitted.
[0035]
If invalid (failure) is stored in the storage element 31, the process proceeds to step 9. Subsequent operations are the same as those in the first embodiment, and will be omitted.
[0036]
【The invention's effect】
As described above, according to the heating cooker of the present invention, the following effects can be obtained.
[0037]
Control unit determines the validity of the heated object presence determination means composed of a light emitting element and a light receiving element during power energization, save, heated object presence determination last when the power energization stored on power again energized initial time Check the effectiveness of the means, and when it is invalid (the light receiving element, light emitting element, control unit, etc. fail), the heating function is configured not to operate, and when the light receiving element, light emitting element, control unit, etc. fails, the heating function Does not work, the heat-resistant glass will not become high temperature, and when the object to be heated is removed after heating is finished, the alarm will not be given to inform you that the heat-resistant glass is hot, and if you are away from the heating cooker, etc. Even if an infant approaches, it is safe.
[Brief description of the drawings]
1 is a cross-sectional view of a heating cooker according to Embodiment 1 of the present invention. FIG. 2 is an external view of the heating cooker according to Embodiments 1 and 2. FIG. 3 is an operation of the heating cooker according to Embodiment 1. Flowchart [FIG. 4] Cross-sectional view of the heating cooker in Embodiment 2 of the present invention [FIG. 5] Operation flowchart of the heating cooker [FIG. 6] External view of the conventional heating cooker [FIG. Sectional view [Explanation of symbols]
2 Heated object 3 Heat-resistant glass 10 Heating part 19 Temperature sensor 24 Light emitting element 25 Light receiving element 28 Control part 29 Warning sound generating means 31 Memory element

Claims (1)

A heat-resistant glass on which the object to be heated is placed, a heating means provided on a stove part below the heat-resistant glass to heat the object to be heated, a temperature measuring means for measuring the temperature of the heat-resistant glass, and the object to be heated Comprises a light-receiving element presence / absence determining means comprising a light-emitting element and a light-receiving element, a warning sound generating means, and a control unit, and the control unit is energized. The effectiveness of the heated object presence / absence determining means is determined and stored, and the validity of the heated object presence / absence determining means at the time of the previous power supply stored at the initial stage of power re-energization is confirmed. A heating cooker configured to emit a warning sound when the heating function is deactivated, and the warning sound generating means removes the object to be heated after the heating is finished, and the heat-resistant glass exceeds a predetermined temperature.

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