JPS63160187A - Electric hot plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to electric hot plates for general household use.

BACKGROUND OF THE INVENTION Conventional electric hot plates have so-called 21, -
A temperature control means using a bimetal thermometer called a control master was provided, and the electricity supply to the heater for heating the cooking plate was controlled by this temperature control means. Further, the reference temperature at which the temperature control means performs the energization control can be set from outside using a setting means such as a variable resistor.

Problems to be Solved by the Invention However, in the above-mentioned conventional configuration, if the user left the setting means set at the maximum output during the previous use and ended the use by unplugging the power plug, etc., the user would not be aware of this. If the power is turned on and the electricity is turned on without using the product, the temperature of the cooking surface will rise to an unexpected temperature, resulting in problems such as overcooking or burning of the food, which poses safety problems when using the product.

The present invention solves the above-mentioned conventional problems, and aims to provide an electric hot plate that is easy to use and has excellent safety.

Means for Solving the Problems 3t-7 In order to achieve the above object, the electric hot plate of the present invention detects the temperature of the cooking plate heated by the heater with a temperature detection means, and detects the temperature of the cooking plate heated by the heater. While comparing the detected temperature with a set temperature of a temperature setting means for setting a desired set temperature of the cooking plate, the energization control means controls the energization of the heater so that the detected temperature and the set temperature substantially match. When the power supply detection means detects that the driving power supply voltage is turned on, the initial setting means changes the set temperature of the temperature setting means to the lowest settable temperature.

Effects Due to the above configuration, even if the user plugs in the power plug and applies power supply voltage, the temperature will remain at the lowest temperature (generally the temperature for keeping warm) unless the temperature is reset. It is also possible to prevent cooking from becoming inconvenient due to unnecessarily high temperatures.

EXAMPLE Hereinafter, an electric hot plate according to an example of the present invention will be described with reference to FIGS. 1 and 2.

In the figure, 1 is a cooking plate, and this cooking plate 1 is heated by a heater 2. Cooking plate 1 heated by the heater 2
The temperature of is detected by the temperature detection means 3. Reference numeral 4 denotes an energization control means, which energizes the heater 2 so that the set temperature of the temperature setting means 5, which sets a desired set temperature of the cooking plate 1, and the detected temperature of the temperature detecting means 3 substantially match. It controls the Reference numeral 6 denotes a power supply detection means for detecting that the drive power supply voltage is applied to the AC power supply 7. When the power supply detection means 6 detects the application of the driving power supply voltage, the initial setting means 8 changes the set temperature of the temperature setting means 5 to the lowest temperature within the settable temperature range.

In the above configuration, the temperature setting means 5 is set according to the user's wishes when the electric hot plate was used last time.
The setting is when the AC power supply 7 and the drive power supply voltage are turned on. For example, when the power plug is connected to an outlet, the lowest temperature is set on page 5 of the settable settings.

FIG. 2 shows a flowchart of an electric hot plate according to an embodiment of the present invention.

That is, first, it waits for the power supply voltage to be applied from the AC power supply 7 (step 9). When the power supply voltage is applied, the set temperature TB of the temperature setting means 5 is changed to the lowest temperature TL (step 10).

Next, it is determined whether or not the settings of the temperature setting means 5 are changed by the user's operation (step 11). If there is no setting change, the heater 2 is energized (step 12). If there is a temperature setting change in step 11, the setting temperature TS of the temperature setting means is changed to a required temperature between the minimum temperature TL and the maximum temperature TH (step 13), and the process proceeds to step 12. Heating of the cooking plate 1 by the heater 2 is started, and the detected temperature T of the temperature detecting means 3 of the cooking plate 1 substantially matches the set temperature Ts, or the detected temperature T
Step 14), step 14 - step 11 → (step 1) until this condition is satisfied
3→) Step 12→6 Page/Repeat the loop of step 14. Then, when the aforementioned detected temperature T≧set temperature Ts is satisfied, the process proceeds to the next step and the power supply to the heater 2 is stopped (step 15). Next, step 16) determines whether the temperature setting has changed while the heater 2 is not energized, and if there is a change, the set temperature Ts is changed in the same manner as in step 13. Step 17) Next step Proceed to step 18. The stethoscope 18 determines whether the detected temperature T of the temperature detection means 3 has become lower than the set temperature Ts of the temperature setting means 5, and when T < T B is satisfied, step 11 is performed.
When T≧Ts is satisfied, the process proceeds to step 15 and continues to stop energizing the heater 20. Cooking is performed as described above, and after the cooking is finished, the voltage application from the AC power source 7 is stopped by, for example, unplugging the power plug from the outlet.

According to the above embodiment, when the driving power supply voltage is applied to the device from the AC power source 7, the temperature is always set to the lowest possible temperature, regardless of what temperature setting means 3 was set at the previous time of use. Because the settings are changed and the temperature rises rapidly when the product is started to be used, a safety problem may occur where a user who was not aware of the temperature rise may touch it and get burnt. Moreover, it is possible to solve the problem of inconvenience such as heating the cooking plate 1 above a desired temperature and having to wait until the cooking plate 1 cools down before cooking.

Effects of the Invention As is clear from the description of the above embodiments, according to the present invention,
When the drive power supply voltage is turned on at the start of cooking, the set temperature of the temperature setting means is always changed to the lowest settable temperature, so even if the user carelessly touches the cooking plate immediately after turning on the power, The cooking board is set at the lowest temperature (so-called keep-warm temperature) to prevent burns and other injuries. As a result, product safety can be improved. Further, it is possible to prevent the inconvenience of heating the cooking plate more than necessary by heating the cooking plate rapidly immediately after the start of energization, and then waiting for the cooking plate to cool down to the desired temperature, thereby improving usability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an electric hot grate according to an embodiment of the present invention, and FIG. 2 is a flowchart of the same. 1... Cooking board, 2... Heater, 3...
...Temperature detection means, 4...Electrification control means, 5
... Temperature setting means, 6 ... Power supply detection means, 8 ... Initial setting means.

Claims (1)

[Claims] The temperature of the cooking plate heated by the heater is detected by a temperature detection means, and the temperature detected by the temperature detection means is compared with a set temperature of a temperature setting means for setting a desired set temperature of the cooking plate. The energization control means controls the energization of the heater so that the detected temperature and the set temperature substantially match, and when the power supply detection means detects that the driving power supply voltage is turned on, the initial setting means controls the energization of the heater. An electric hot plate configured to change the set temperature of a temperature setting means to the lowest settable temperature.