JP3008645B2 - Induction heating cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating cooker used in ordinary households.

[0002]

2. Description of the Related Art FIG. 6 is a block diagram of a conventional cooking device, and FIG. 7 is a diagram for explaining the operation of the cooking device. That is, in FIG. 6, reference numeral 21 denotes a commercial AC power supply, and 22 denotes a pot
Is heated. The temperature detecting means 24 for measuring the temperature of the pan 23 includes a thermistor 24a of a temperature detecting element for measuring the temperature in contact with the bottom surface of the pan 23 and a temperature detecting circuit 24b for converting a change in the resistance value of the thermistor 24a into a temperature. It consists of. The control unit 25 controls energization of the heater 22 by opening and closing the relay 26. Reference numeral 27 denotes temperature setting means for setting an arbitrary cooking temperature required by the user. Control means 25 opens and closes a relay 26 so that the temperature measured by the temperature detection means 24 becomes the temperature set by the temperature setting means 27. And then adjust the temperature. When the heating is continued for a predetermined period of time without any operation such as temperature setting, the automatic stop unit 28 considers that the user has left the cooking device forgotten to stop heating even after the cooking is completed. Has stopped its operation.

The operation at that time will be described with reference to FIG. FIG.
Shows a state in which the operation is stopped after T0 time from the last change of the set temperature. Further, in this case, the predetermined time T0 is generally set to one hour from the usage condition of a normal heating cooker.

Further, in this conventional example, an example of a heating cooker using the heater 22 is used. However, an induction heating cooker is generally not provided with an automatic stop function.

[0005]

However, in the configuration of the conventional cooking device described above, the time until the operation is stopped is constant regardless of the set temperature. Even if there is a problem, if the food is left at a high temperature setting, there is a problem that the cooked food sticks to the pot 23.

An object of the present invention is to solve the above-mentioned problems, and it is a first object of the present invention to provide a more convenient induction heating cooker which can be used safely at any set temperature.

[0007] A second object of the present invention is to make the automatic stop time shorter when the temperature rises by being left in the middle of cooking, thereby making it even safer.

A third object of the present invention is to provide an easy-to-use induction heating cooker which can be used safely even if it is heated and left at any set power.

[0009] A fourth object of the present invention is to make the automatic stop time shorter if the temperature is raised during heating cooking with a predetermined electric power and the automatic stop time is made shorter, so as to further increase the safety. .

[0010]

In order to achieve the above object, a first object of the present invention is to provide an induction heating device comprising a high-frequency power source and a heating coil and a pot heated by the induction heating device. Temperature detection means for measuring the temperature, temperature setting means for arbitrarily setting the temperature of the pan heated by the induction heating device, and controlling the heating output of the induction heating device based on the temperature measured by the temperature detection means. Control means for setting the temperature of the pan heated by the induction heating device to a temperature arbitrarily set by the temperature setting means, and after a lapse of a predetermined time T1 since the control temperature of the pan is set by the temperature setting means. An automatic stop means for outputting an output to the control means to stop the operation of the induction heating device and changing a time T1 until the stop by the temperature set by the temperature setting means; It is those with a.

A second object of the present invention is to provide the induction heating cooker described in the first object of the present invention, wherein the temperature detected by the temperature detecting means is higher than a predetermined temperature set by the temperature setting means at that time. If T1 is exceeded, after a lapse of a predetermined time T2 shorter than the predetermined time T1, an output is outputted to the control means to stop the operation of the induction heating device, and the time T2 until the stop is set to the set temperature by the temperature setting means. And a stop time changing means provided for changing the stop time.

Further, a third object of the present invention is to provide an induction heating device comprising a high-frequency power supply and a heating coil, a power setting device for arbitrarily setting electric power for heating the pot by the induction heating device, and the induction heating device. Control means for controlling the heating output of the apparatus to perform heating with the power arbitrarily set by the power setting means, and the control means after a lapse of a predetermined time T3 since the heating power of the pan is set by the power setting means And an automatic stop means for stopping the operation of the induction heating device and changing the time T3 until the stop by the power set by the power setting means.

The fourth object of the present invention is to provide an induction heating cooker as set forth in the third object of the present invention, wherein the temperature detecting means measures a temperature of a pot heated by the induction heating device, and the temperature detecting means comprises: When the temperature measured by the above exceeds the predetermined temperature, the operation is performed to the control means after the lapse of the predetermined time T4 shorter than the predetermined time T3 to stop the operation of the induction heating device, and the time T4 until the stop is determined. And a stop time changing means adapted to be changed by the power set by the power setting means.

[0014]

According to the first aspect of the present invention, the time until the automatic stop is changed according to the set temperature by providing the automatic stop means in the induction heating cooker for controlling the temperature. Even when the cooking device is left at any set temperature, the food does not scorch.

In the second problem solving means, since the stop time changing means is provided in the first problem solving means, when the temperature of the pot is left higher than the set temperature, the automatic stop is performed. Time can be shortened.

Further, according to the third means for solving the problem, by providing the automatic stop means in the induction heating cooker for controlling the electric power, the time until the automatic stop is changed by the set power, so that the induction during the cooking is performed. Even when the cooking device is left at any set power, the food does not burn.

Further, in the fourth problem solving means, since the stop time changing means is provided in the third problem solving means, when the temperature of the pot is left higher than the predetermined temperature, the automatic stop is performed. Time can be shortened.

[0018]

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

FIG. 1 is a block diagram showing an induction heating cooker according to the first to fourth embodiments of the present invention.
Is a timing chart for explaining the operation of the first embodiment, FIG. 3 is a timing chart for explaining the operation of the second embodiment, and FIG. 4 is a timing chart for explaining the operation of the third embodiment. FIG. 5 is a timing chart for explaining the operation of the fourth embodiment.

In FIG. 1, reference numeral 1 denotes a commercial AC power supply, and 2 denotes an induction heating device, which comprises a high-frequency power supply 2a for extracting a high-frequency voltage from the commercial AC power supply 1 and a heating coil 2b.

Reference numeral 3 denotes a pot heated by the induction heating device 2, and the temperature of the pot 3 is measured by temperature detecting means 4.
It is. The temperature setting means 5 sets an arbitrary cooking temperature required by the user, and the power setting means 6 sets an arbitrary heating power required by the user. When the control temperature is set by the temperature setting means 5, the control means 7 adjusts the heating power of the induction heating device 2 so that the temperature of the pot 3 measured by the temperature detection means 4 becomes the set temperature. When the control power is set by the power setting means 6, the heating output of the induction heating device 2 is adjusted to the set power.

The automatic stop means 8 is provided for the induction heating device after a lapse of a predetermined time from the last operation of changing the temperature setting, changing the power setting, or switching from temperature control to power control and vice versa. To stop the output of 2,
The stop time at this time is set to be shorter as the temperature set by the temperature setting means 5 is higher and the power set by the power setting means 6 is higher. The time for this automatic stop is generally longer than the time to continue heating without changing the temperature or power settings while cooking, but the food is still scorched even if the food is left at that temperature or power. The time that does not burn or burn out is 1 hour when the temperature setting or the power setting is high, and about 2 hours when the setting is low. The stop time changing means 9
During the temperature control, the automatic stop time is shortened when the measured temperature of the temperature detecting means 4 is higher than the set temperature. In addition, even when power control is performed, the automatic stop time is shortened when the temperature is higher than a predetermined temperature, and the predetermined temperature at this time is generally set to about 200 ° C.

Next, the operation of the first embodiment of the present invention will be described with reference to FIGS. In this embodiment, the power setting means 6 and the stop time changing means 9 are omitted from the block diagram of FIG. In this configuration, FIG.
As shown in (a), the initial temperature setting when heating is started is set to 180 ° C. When the temperature is changed from this setting to the temperature setting of 160 ° C., the operation of the induction heating cooker is stopped by the operation of the automatic stopping means 8 after T11 hours from the change.
When the set temperature is increased from the initial temperature setting of 180 ° C. to 200 ° C. as shown in FIG. 2B, the operation of the induction heating cooker is performed by the operation of the automatic stop means 8 after T12 time shorter than T11. To stop.

Next, the operation of the second embodiment of the present invention will be described with reference to FIGS. In this embodiment, the stop time changing means 9 is provided in the first embodiment. In this configuration, as shown in FIG. 3A, when heating is started and heating is continued at a setting of 160 ° C., that is, when temperature control is performed at a temperature around 160 ° C., FIG. The same time T11 as in the first embodiment shown in FIG.
To automatically stop, and as shown in FIG.
When the temperature higher than 160 ° C. continues even though the temperature is 0 ° C., the operation of the induction heating cooker is performed by the operation of the stop time changing means 9 and the automatic stop means 8 after a time T21 shorter than T11. To stop.

The operation of the third embodiment of the present invention will be described with reference to FIGS. 4 (a) and 4 (b). In this embodiment, the temperature detecting means 4, the temperature setting means 5, and the stop time changing means 9 are omitted from the block diagram of FIG.
In this configuration, as shown in FIG. 4A, the initial power setting when heating is started is set to 1200 W. When changing from this setting to the 800W power setting, T
After 31 hours, the operation of the induction heating cooker is stopped by the function of the automatic stop means 8. Also, as shown in FIG.
When the set power is reduced to 400 W from the initial setting of 200 W, the operation of the induction heating cooker is stopped by the operation of the automatic stop means 8 after T32 time longer than T31.

Next, the operation of the fourth embodiment of the present invention will be described with reference to FIGS. In this embodiment, the temperature detecting means 4 and the stop time changing means 9 are provided in the third embodiment. In this configuration, FIG.
As shown in FIG. 4A, when the heating is started and the setting is set to 800 W and the heating is continued, that is, when the temperature is stabilized at a temperature around 200 ° C., the case of the third embodiment shown in FIG. At the same time T31, the automatic stop is performed, and the power is set to 800 W as shown in FIG.
When the temperature higher than 0 ° C. continues, the operation of the induction heating cooker is stopped by the operation of the stop time changing means 9 and the automatic stop means 8 after T41 time shorter than T31.

[0027]

As is apparent from the above description, according to the first aspect, in the induction heating cooker for controlling the temperature,
By providing an automatic stop means that changes the stop time according to the set temperature, even if the induction heating cooker is left in the middle of cooking at any set temperature, cooking can be safely done without scorching the food. it can.

According to the second aspect of the present invention, in the induction heating cooker for controlling the temperature, when the temperature higher than the set temperature continues, the stop time changing means for shortening the automatic stop time is provided, so that the abnormality of the equipment can be prevented. Even when the temperature rises, the food can be used safely without scorching.

According to the third aspect of the present invention, in the induction heating cooker for controlling the electric power, the automatic stop means for changing the stop time by the set electric power is provided.
Even if the induction heating cooker is left in the middle of cooking at any set power, cooking can be done safely without the food being scorched.

According to the fourth aspect of the present invention, in the induction heating cooker for controlling the electric power, the stop time changing means for shortening the automatic stop means when the temperature higher than the predetermined temperature continues is provided. Even when the temperature rises due to an abnormality or the like, the food can be used safely without scorching.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an induction heating cooker according to a first, a second, a third, and a fourth embodiment of the present invention.

FIGS. 2A and 2B are timing charts for explaining the operation of the first embodiment; FIGS.

FIGS. 3A and 3B are timing charts for explaining the operation of the second embodiment; FIGS.

FIGS. 4A and 4B are timing charts for explaining the operation of the third embodiment; FIGS.

FIGS. 5A and 5B are timing charts for explaining the operation of the fourth embodiment; FIGS.

FIG. 6 is a block diagram of a conventional heating cooker.

FIG. 7 is a timing chart for explaining the operation of the cooking device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Commercial AC power supply 2 Induction heating apparatus 2a High frequency power supply 2b Heating coil 3 Pot 4 Temperature detection means 5 Temperature setting means 6 Power setting means 7 Control means 8 Automatic stop means 9 Stop time change means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-149097 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H05B 6/12

Claims (4)

(57) [Claims] 1. An induction heating device comprising a high-frequency power supply and a heating coil, a temperature detecting means for measuring a temperature of a pan heated by the induction heating device, and an arbitrary temperature of the pan heated by the induction heating device. Temperature setting means for setting
Control means for controlling the heating output of the induction heating device based on the temperature measured by the temperature detection means to set the temperature of the pan heated by the induction heating device to a temperature arbitrarily set by the temperature setting means, After a predetermined time T1 has elapsed since the control temperature of the pan was set by the temperature setting means, an output is made to the control means to stop the operation of the induction heating device, and the time T1 until the stop is determined by the temperature setting means. An induction heating cooker provided with automatic stopping means adapted to be changed according to a set temperature. 2. The induction heating cooker according to claim 1, wherein
If the measured temperature of the temperature detecting means exceeds a predetermined temperature T1 higher than the temperature set by the temperature setting means at that time, an output is made to the control means after a lapse of a predetermined time T2 shorter than the predetermined time T1. An induction heating cooker provided with a stop time changing means for stopping the operation of the induction heating device and changing a time T2 until the stop by the temperature set by the temperature setting means. 3. An induction heating device comprising a high-frequency power supply and a heating coil, etc .; power setting means for arbitrarily setting electric power for heating the pot by the induction heating device; and controlling a heating output of the induction heating device. Control means for performing heating with the power arbitrarily set by the power setting means, and outputting to the control means by outputting to the control means after a lapse of a predetermined time T3 since the heating power of the pan is set by the power setting means. An induction heating cooker comprising an automatic stop means for stopping the operation of the heating device and changing a time T3 until the stop by the power set by the power setting means. 4. The induction heating cooker according to claim 3, wherein
Temperature detecting means for measuring the temperature of the pot heated by the induction heating device; and when the temperature measured by the temperature detecting means exceeds a predetermined temperature, control is performed after a lapse of a predetermined time T4 shorter than the predetermined time T3. Output to the means to stop the operation of the induction heating device, and a time T4 until the stop.
An induction heating cooker provided with a stop time changing means for changing the temperature according to the power set by the power setting means.