JPH1189725A - Electric pot - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically shift to a condition of saving electricity after using hot water by controlling turning on electricity to a heater in a manner that after re-boiling hot water during thermal insulation the hot water is kept for a predetermined time period at a temperature of thermal insulation adjacent to a boiling point higher than a predetermined temperature and the temperature of the hot water is reduced to the temperature of the thermal insulation. SOLUTION: A boiling display section is indicated when a re-boiling switch is operated, and selected display section of thermal insulation temperature or a display section of thermal insulation temperature adjacent to boiling point is changed to a flashing condition. When a switch for setting temperature is operated after operation of the re-boiling switch, a display section for flashing is modified in turns. When re-boiling hot water is detected by a re-boiling S19 detection sensor, ration of turning on electricity to a heater is 0% S20 and a boiling display section is turned off S21. In this case, when temperature for keeping hot water is selected between 60 deg.C or 90 deg.C, the display section of the thermal insulation and the display section of the thermal insulation temperature adjacent to the boiling point are kept in the flashing condition S22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric pot, and more particularly to an electric pot characterized by its heat control.

[0002]

2. Description of the Related Art Conventionally, electric pots have two types depending on the application.
There is one that can be kept at the above temperature (for example,
See JP-A-1-285218). Then, in this electric pot, it is possible to keep the temperature at a selectable keeping temperature after re-boiling. The heat retention temperature includes a temperature for power saving, a temperature suitable for baby milk, a temperature suitable for tea, and the like.

[0003]

However, the electric pot is kept at a predetermined keeping temperature after re-boiling. For this reason, if the temperature is kept at the maximum selectable temperature after re-boiling, the temperature retention at the maximum temperature is continued thereafter unless the user changes the setting. For this reason, even when hot water is not required after a predetermined time, the power supply to the heater is maintained at a high value, and there is a problem in terms of power saving. On the other hand, after re-boiling, if the temperature is kept at a low temperature for the purpose of power saving, after re-boiling, the temperature of the hot water drops early within a predetermined time, and it is necessary to perform re-boiling again. Not practical.

[0004] Therefore, an object of the present invention is to provide an electric pot that can use hot water after re-boiling and that can automatically enter a power-saving state thereafter.

[0005]

According to the present invention, as a means for solving the above-mentioned problems, energization control of a heater is performed based on a temperature detected by a temperature detection sensor, so that at least two different liquids are stored. In the electric pot that keeps the temperature at the keeping temperature, when the re-boiling is performed during keeping the temperature, after the re-boil, the control means keeps the keeping temperature at the near-boiling keeping temperature of 95 ° C. or more for a predetermined time, and then lowers the temperature to the keeping temperature. Is provided with control means for controlling the energization of the heater.

With this configuration, hot water can be used for a predetermined time after reboiling, and there is no need to reboil again. In addition, when the hot water is used, the temperature is automatically maintained at the heat retaining temperature, so that the operation of setting the heat retaining temperature becomes unnecessary, and the forgetting of the operation can be prevented.

In this case, at least two or more different heat-retention temperatures are provided for each of different heat-retention temperatures, a near-boiling heat-retention temperature display for displaying a temperature state of 95 ° C. or more, and the fact that re-boiling is performed during the heat retention. A re-boiling display unit, and when the re-boiling is performed during the heat retention, the control unit causes a display by the near-boiling heat retention temperature display unit in addition to the re-boil display unit and the corresponding heat retention temperature display unit. It is preferable to do so.

[0008] With this configuration, it can be determined at a glance whether hot water can be used and whether or not the hot water is maintained at the heat retaining temperature after a predetermined time.

Further, the control means may prohibit the heat retention at a temperature near the boiling point when the minimum heat retention temperature is set to the minimum temperature.

According to this configuration, when controlling the temperature to the lowest heat retaining temperature, the user judges that the purpose is often to save power, and immediately without performing the temperature control from the re-boiling to the heat retaining temperature near the boiling point, immediately. Temperature control based on the minimum temperature can be performed.

[0011]

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

The electric pot shown in FIG. 1 has a structure in which an inner container 2 is accommodated in a container body 1 and closed by a lid 3. A heater 4 and a temperature sensor 5 are provided on the bottom surface of the inner container 2. A vapor hole 6 is formed in the lid 3, and a boiling detection sensor 7 is provided in the middle of the vapor hole 6. A display / operation panel 8 is provided at a front portion of the lid 3.

As shown in FIG. 5, the display / operation panel 8 includes a temperature setting switch 9, a reboiler switch 10, heat retention temperature display sections 11a and 11b, and a heat retention temperature display section 12 near boiling.
And a boiling indicator 13. Insulation temperature display section 11a,
11b is composed of two LEDs indicating that the heat retention temperature is 60 ° C. and 90 ° C. The near-boiling heat retaining temperature display section 12 is constituted by one LED indicating that the temperature is 98 ° C.

Signals from the temperature sensor 5, the boiling detection sensor 7, the temperature setting switch 9, and the re-boiling switch 10 are input to a control device 14. The control device 14 controls the energization rate to the heater 4 based on these input signals, and changes the display states of the heat retention temperature display units 11a and 11b, the near-boiling heat retention temperature display unit 12 and the boiling display unit 13. .

Next, a control method by the control device 14 will be described with reference to flowcharts of FIGS.

First, if the power is turned on (step S
1) Heating is started by setting the duty ratio to the heater 4 to 100% (step S2). At this time, as shown in FIG. 5, the boiling display unit 13 is turned on (step S3), and in this embodiment, the near-boiling heat retention temperature display unit 12 whose maintenance temperature is 98 ° C. is turned on and off (see FIG. 5). Step S4).

Then, it is determined whether or not the temperature setting switch 9 has been operated (step S5). If there is an operation within a predetermined time (for example, 5 seconds), as shown in FIG. Is changed, and the corresponding one of the heat retention temperature display units 11a and 11b and the near-boiling heat retention temperature display unit 12 is blinked (step S6). If there is no operation within a predetermined time, the corresponding display unit 11
a, 11b or 12 is changed from the blinking state to the lighting state (step S7). Note that the input of the reboil switch 10 is not accepted during the water heating.

Subsequently, when the stored liquid boils (step S8), the rate of power supply to the heater 4 is set to 0% to lower the temperature of the liquid (step S9). At this time, the boiling display unit 13 is turned off (step S10), and the corresponding heat retention temperature display units 11a and 11b or the near-boiling heat retention temperature display unit 12 is turned on / off (step S11). Then, as shown in FIG. 7, if the liquid temperature decreases to the temperature set by operating the temperature setting switch 9 (step S1).
2) The temperature is adjusted by changing the duty ratio to the heater 4 so as to maintain the temperature (step S13).

When the stored liquid is maintained at the desired temperature in this way, it is determined again whether or not the temperature setting switch 9 has been operated (step S14), and if there has been an operation, the flow returns to step S11. Flash the corresponding display. If there is no operation, it is determined whether or not the reboil switch 10 has been operated (step S15). If the reboil switch 10 has not been operated, the process returns to step S13 to continue the temperature control at the selected temperature. When the reboil switch 10 is operated, as shown in FIG. 8, the boiling display unit 13 is turned on (step S16), and the selected heat retention temperature display units 11a and 11b or the near-boiling heat retention temperature display unit 12 is displayed. A blinking state is set (step S17). After the reboil switch 10 is operated, the temperature setting switch 9
Is operated (step S18), the display units 11a, 11b and 12 to be blinked are sequentially changed (step S1).
7).

Next, it is determined whether or not re-boiling has been detected by the boiling detection sensor 7 (step S19). Then, when re-boiling is detected, the energization rate to the heater 4 is set to 0% as described above (step S20), and the boiling display unit 13 is turned off (step S21). In this case, if 60 ° C. or 90 ° C. is selected as the temperature to be maintained, as shown in FIG. 9, the heat retaining temperature display section 11a or 11b is turned on, and the near-boiling heat retaining temperature display section 12 is kept blinking. (Step S22).

Thus, after the reboil is completed, the user can
It is possible to easily determine at a glance that the hot water temperature is maintained at 98 ° C., and after the elapse of the predetermined time, the temperature is returned to the initially set heat retaining temperature of 60 ° C. or 90 ° C.

After that, if a predetermined time has elapsed from the completion of the re-boiling (step S23), the power supply to the heater 4 is set to 0% (step S24), and if the detected temperature T becomes lower than the set temperature Th (step S25), the flow chart shown in FIG. As shown in FIG. 10, the near-boiling heat retaining temperature display section 12 is turned off (step S10).
26) The temperature is adjusted at the corresponding temperature (step S27).

Finally, when the heat retention temperature returns to 60 ° C. or 90 ° C., the near-boiling heat retention temperature display portion 12 showing 98 ° C. is turned off, and only the heat retention temperature display portions 11a and 11b showing 60 ° C. or 90 ° C. Is maintained in the lighting state (step S28).

In the above-described embodiment, the boiling sensor 7 detects the boiling. However, the temperature sensor 5 detects the rate of temperature rise of the hot water temperature, and predicts the boiling based on the detection result. Good.

Further, in the above-described embodiment, the temperature is controlled to the predetermined temperature after maintaining the temperature near the boiling for a predetermined time. However, if the temperature is maintained at the temperature near the boiling, the temperature after the re-boiling is maintained. As long as there is no operation such as turning off the power, it is possible to maintain the temperature near the boiling point.

Further, in the above-described embodiment, two different heat retaining temperatures are set, but only one heat retaining temperature or three or more heat retaining temperatures may be set. In the case of only one, the near-boiling heat retaining temperature display section 12 and the temperature setting switch 9 may be unnecessary.

Further, in the above-described embodiment, the temperature is controlled to a temperature close to the reboil for a predetermined time after the reboil. However, when the temperature is set to the minimum heat retaining temperature (60 ° C. in the present embodiment), The temperature may be adjusted to the minimum holding temperature immediately after the reboil. This is because it is considered that it is not necessary to control the temperature near re-boiling for such a long time when the temperature is set to the minimum heat retaining temperature.

[0028]

As is clear from the above description, according to the electric pot of the present invention, after the re-boiling, the temperature is maintained at a temperature near the boiling point of 95 ° C. or more for a predetermined time, and then lowered to the temperature. Therefore, it can be used only for the time required for hot water after reboiling, which is practical. Moreover, after the hot water is used, the temperature can be automatically maintained at the heat retaining temperature without performing any setting operation, which is excellent in power saving.

Further, when re-boiling is performed, in addition to the re-boiling display section and the corresponding heat retaining temperature display section, a display near the boiling temperature is displayed, so that the hot water stored at a glance can be displayed. And the state after that can be determined, and it becomes possible to use it with confidence.

Further, when the minimum temperature is set so that the temperature is maintained at the minimum temperature, the temperature control at the temperature near the boiling point is prohibited, so that the temperature can be controlled more easily for the user. Become.

[Brief description of the drawings]

FIG. 1 is a schematic view of an electric pot according to the present invention.

FIG. 2 is a flowchart illustrating a control process performed by the control device of FIG. 1;

FIG. 3 is a flowchart illustrating a control process performed by the control device of FIG. 1;

FIG. 4 is a flowchart showing a control process by the control device of FIG. 1;

FIG. 5 is a front view showing a state of the display / operation panel of FIG. 1 after power is turned on and before boiling.

FIG. 6 is a diagram illustrating a state where a temperature setting switch is operated from the state of FIG. 5;

FIG. 7 is a diagram showing a state where boiling has been completed from the state of FIG. 6;

FIG. 8 is a diagram showing a state in which the reboil switch has been operated from the state of FIG. 7;

9 is a diagram showing a state immediately after the completion of reboil from the state of FIG. 8;

FIG. 10 is a diagram showing a state where a predetermined time has elapsed from the state of FIG. 9;

[Explanation of symbols]

 Reference Signs List 4 heater 5 temperature sensor 7 boiling detection sensor 9 temperature setting switch 10 reboiler switch 11a, 11b heat retention temperature display part 12 heat retention temperature display part near boiling 13 boiling display part 14 controller

Claims (3)

[Claims] 1. An electric pot for controlling the energization of a heater based on a temperature detected by a temperature detection sensor and keeping the stored liquid at at least two different keeping temperatures, wherein the control means re-operates during the keeping of the temperature. In the case where boiling is performed, after re-boiling, a control means for controlling the power supply to the heater so as to maintain the temperature near the boiling temperature of 95 ° C. or more for a predetermined time and thereafter reduce the temperature to the heat retaining temperature is provided. Electric pot. 2. A heat retention temperature display section provided for at least two or more different heat retention temperatures, a near-boiling heat retention temperature display section showing a temperature state of 95 ° C. or more, and indicating that re-boiling has been performed during the heat retention. A reboil display unit, wherein the control unit, when the reboil is performed during the heat retention, causes the display to be performed by the near-boiling heat retention temperature display unit in addition to the reboil display unit and the corresponding heat retention temperature display unit. The electric pot according to claim 1, wherein: 3. The electric pot according to claim 1, wherein the control unit prohibits the heat retention at a temperature near the boiling point when the minimum heat retention temperature is set to the minimum temperature.