KR20170094507A - Heating Cooker - Google Patents

Abstract

The present invention provides a heating cooker capable of suppressing a fluctuation range of a temperature detected in a cooking container to be small when a heating amount of the cooking container is automatically adjusted by a heating means. The heating means (2) for heating the cooking container is capable of adjusting the heating amount for each level of the heating amount of a plurality of stages. A heating control means (16) for automatically changing the heating amount may lower the level of the heating amount by a plurality of stages in accordance with a decrease in a temperature difference between the detected temperature and a target temperature in a case where the detected temperature is on a rise. When the detected temperature is falling, the level of the heating amount is increased by the plurality of stages in accordance with the increase in the temperature difference between the detected temperature and the target temperature.

Description

{Heating Cooker}

The present invention relates to a heating cooker having a function of automatically controlling a heating amount of a cooking vessel by a heating means according to a temperature of a cooking vessel.

As this kind of heating cooker, a gas furnace having a furnace burner as a heating means, an electromagnetic cooker having an induction heating (IH) section as a heating means, or an electric furnace having a nichrome wire heater as a heating means .

For example, in a gas stove, a pot bottom temperature sensor (temperature detecting means) for detecting the temperature of a bottom portion of a cooking container such as a pot heated by a stove burner (heating means) It is known that the heating temperature of the cooking vessel is maintained at a predetermined temperature range by controlling the heating power (heating amount) of the stove burner to about two stages depending on the detected temperature of the stove burner (see, for example, Patent Document 1 ).

JP 1994-123429 A

However, even if the heating amount is switched between the large and small two stages, it is difficult to maintain the temperature of the cooking container containing the object to be heated (detection temperature of the pot bottom temperature sensor) within the predetermined temperature range, And the variation range of the temperature of the cooking vessel is increased.

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a heating cooker capable of suppressing the fluctuation range of the temperature detected in the cooking container when the heating amount of the cooking container is automatically adjusted by the heating means.

In order to achieve the above object, the present invention provides a cooking device comprising: heating means for heating a cooking container containing a cooking material; temperature detecting means for detecting a temperature of the cooking container; And a heating control means for increasing a heating amount of the heating means when the detected temperature is lower than the target temperature and decreasing a heating amount of the heating means when the detected temperature is higher than the target temperature, The heating amount can be adjusted for each heating amount level obtained by dividing the heating amount range from the heating amount to the maximum heating amount by a plurality of stages, In the range of a predetermined number of steps of the total heating amount level, in accordance with the decrease in temperature difference between the detected temperature and the target temperature (for example, , The heating amount level is reduced by a plurality of stages when the difference between the detected temperature and the target temperature is decreased by 1 DEG C, and when the detected temperature of the temperature detecting means is falling, (For example, when the difference between the detected temperature and the target temperature is increased by 1 DEG C), the heating level is increased by a plurality of stages in accordance with an increase in the temperature difference between the detected temperature and the target temperature do.

The heating control means automatically adjusts the heating amount of the heating means so that the detected temperature of the temperature detecting means becomes the target temperature. In the initial stage in which the heating means starts heating, since the detection temperature of the temperature detection means is smaller than the target temperature, the heating control means performs control to increase the heating amount level with respect to the heating means. During this time, the heating control means calculates the difference between the detected temperature and the target temperature in accordance with the change of the detected temperature.

When the detected temperature approaches the target temperature due to the temperature rise of the cooking container, the difference between the detected temperature and the target temperature becomes small. Thus, the heating control means reduces the heating level by a plurality of stages in accordance with the decrease in the temperature difference between the detected temperature and the target temperature for each predetermined temperature difference.

Specifically, for example, when the maximum is set as the heating level "6" and the minimum is set as the heating level "1", when the difference between the detected temperature and the target temperature becomes 6 ° C., Quot; 6 "to the heating means. Thereafter, when the difference between the detected temperature and the target temperature becomes 5 캜, the heating amount level is set to "4" which is smaller than the heating amount level "5 ". When the difference between the detected temperature and the target temperature is 4 DEG C, the heating amount level " 4 " is maintained. When the difference between the detected temperature and the target temperature becomes 3 DEG C, 2 ".

As described above, when the difference between the detected temperature and the target temperature is 5 ° C or 3 ° C, the heating level is reduced a plurality of times, and as the detected temperature approaches the target temperature, It is possible to delay the rise of the temperature of the cooking container facing the target temperature and to suppress the excessive temperature rise (i.e., the rise of the temperature of the cooking container after the detection temperature becomes equal to the target temperature) can do.

If the detected temperature changes from rising to falling after the detected temperature exceeds the target temperature and the detected temperature is lower than the target temperature, the heating control means automatically adjusts the heating amount of the heating means so as to suppress the excessive decrease in the detected temperature do. During this time, the heating control means calculates the difference between the detected temperature and the target temperature in accordance with the change of the detected temperature. When the detected temperature is moved away from the target temperature due to the temperature drop of the cooking container, the difference between the detected temperature and the target temperature increases. Therefore, the heating control means sets the temperature difference between the detected temperature and the target temperature The heating level is increased by a plurality of stages.

Specifically, for example, when the maximum is set at the heating level "6" and the minimum is set at the heating level "1", the heating control means controls the heating Quot; 2 "to the heating means. Thereafter, when the difference between the detected temperature and the target temperature becomes 3 DEG C, the heating amount level "4" is set to be larger than the heating amount level "3 ". When the difference between the detected temperature and the target temperature becomes 4 DEG C, the heating amount level "4" is maintained. When the temperature difference between the detected temperature and the target temperature becomes 5 DEG C, Level "6 ".

As described above, when the difference between the detected temperature and the target temperature is 3 DEG C or 5 DEG C and the heating level is increased by a plurality of stages, the temperature decreases as the detected temperature goes away from the target temperature It is possible to quickly suppress the temperature drop of the cooking container and to reduce the variation range of the temperature of the cooking container with respect to the target temperature.

The specific heating level level at this time is a range of "2" to "4" and a range of "4" to "6". It is to be noted that the target temperature in the present invention also includes a temperature range including an upper limit temperature and a lower limit temperature.

The heating cooker of the present invention may further include an operation knob capable of setting a heating amount level by a user's operation, a plurality of position display portions indicating a heating amount level corresponding to the operation amount of the operation knob, And a light emitting element of a position display portion that indicates a heating amount level set by an operation is lighted, and when the heating amount level is changed by the heating control means , The light emitting element of the position display portion indicating the heating amount level set by the user is maintained in the light emitting state and the light emitting element of the position display portion indicating the heating amount level changed by the heating control means is set to the heating amount level set by the user Light emitting element control means for emitting light of a color different from that of the light emitting element of the position display portion Characterized in that is compared.

In the heating cooker of the present invention, as described above, the heating control means automatically adjusts the heating amount so that the cooking vessel temperature becomes the target temperature. On the other hand, the heating cooker of the present invention is capable of setting the heating amount level even when the user operates the operation knob. For this reason, when heating of the cooking container is started, the heating level set by the user by the operation handle may be changed by the heating control means. As a result, since the cooking vessel is heated to a heating amount different from that set manually by the user, the user is discomforted.

Therefore, the light-emitting element control means maintains the state in which the light-emitting element of the position display portion indicating the heating amount level set by the user is emitted first. Thereafter, when the heating control means changes the heating amount level, the light emitting element control means sets the light emitting element of the position indicating portion, which indicates the changed heating amount level at this time, to the light emitting element of the position indicating portion, And emits light of a different color. According to this, the user can visually check the manually set heating level and the automatically changed heating level, thereby alleviating the uncomfortable feeling of the user.

Provided is a heating cooker capable of suppressing a fluctuation range of a temperature detected in a cooking vessel to be small when automatically controlling a heating amount of the cooking vessel by the heating means.

The heating means (2) for heating the cooking vessel is capable of adjusting the heating amount for each heating level of a plurality of stages. The heating control means 16 for automatically changing the heating amount can reduce the heating amount level to a plurality of smaller values in accordance with the decrease in the temperature difference between the detected temperature and the target temperature when the detected temperature is rising, The heating amount level is increased by a plurality of stages in accordance with an increase in temperature difference between the detected temperature and the target temperature.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram schematically showing a configuration of a recess of a gas stove, which is an embodiment of the present invention. Fig.
2 is a flow chart showing the operation of the controller.
3 is a view showing an operation handle.
4 is a view for explaining a light emission pattern of a position display portion of an operation knob;

Embodiments of the present invention will be described with reference to the drawings. In the present embodiment, the gas furnace 1 shown in Fig. 1 is applied as a heating cooker. As shown in Fig. 1, a gas furnace 1 includes a stove burner 2 (heating means), a controller 3 for controlling the stove burner 2, And an operation panel 4 composed of a switch group (not shown) for performing an instruction and various settings.

A pan bottom temperature sensor 7 (temperature detecting means) is provided at the center of the stove burner 2. [ The pot bottom temperature sensor 7 is provided with a pot 9 (cooking container) which is brought into contact with the bottom portion of the pot 9 when the pot 9 (the cooking container) is placed on the container base 8 and heated by the stove burner 2 And outputs a signal indicative of the detected temperature of the bottom portion of the sensor.

The furnace burner 2 performs an ignition operation, a thermal power control, and a fire extinguishing operation by an operation handle 10 capable of a pressing operation and a rotating operation. In other words, the stove burner 2 is ignited or extinguished by depressing the operating handle 10. It is also possible to control the level of the thermal power (heating amount) of the stove burner 2 (control of the supply flow rate of the fuel gas to the stove burner 2) by rotating the operating knob 10. In the stove burner 2 of the present embodiment, the thermal power level (heating amount level) is adjustable in nine steps (minimum thermal power level "1" to maximum thermal power level "9").

The furnace burner 2 is supplied with fuel gas through a gas supply pipe 11. The gas supply pipe 11 is provided with a circular solenoid valve 12 for opening and closing the gas supply pipe 11 and a flow control valve 13 for regulating the flow rate of the fuel gas flowing through the gas supply pipe 11.

An ignition electrode 14 for igniting the stove burner 2 and a thermocouple 15 for detecting the combustion state of the stove burner 2 are provided in the vicinity of the stove burner 2.

The controller 3 controls the operation of the gas furnace 1 by executing a program for control of the gas furnace 1 held in the memory, not shown in the figure.

As shown in Fig. 1, the controller 3 includes a thermal power control unit 16 (heating control means) and a position display control unit 17 (light emitting element control means) as functions. The thermal power control unit 16 is provided with a temperature difference calculating unit 18 (temperature difference calculating means) and a temperature tendency measuring unit 19 (temperature tendency measuring means) as functions.

A signal indicating the detection temperature of the pan bottom temperature sensor 7 and a signal indicating the flame detection of the thermocouple 15 are input to the controller 3 .

The controller 3 controls the operations of the source solenoid valve 12, the flow rate control valve 13, the ignition electrode 14, and the like of the gas supply pipe 11 by outputting control signals corresponding to the respective functions.

The flow rate control valve 13 is a motor-operated valve to which the proportional valve or the flow rate switching valve is applied and which changes the gas flow rate of the gas supply pipe 11 by a valve body not shown in the drawing driven by the stepping motor 21. The controller 3 changes the thermal power level of the stove burner 2 by changing the degree of opening of the flow rate control valve 13 through the stepping motor 21. [

The thermal power control unit 16 of the controller 3 performs the burning operation of the stove burner 2 based on the operation signal of the operation knob 10 and controls the heating operation of the stove burner 2 based on the detection temperature of the pot bottom temperature sensor 7 Automatically adjust the firepower level to prevent.

Here, the operation of the controller 3 according to the gist of the present invention will be described with reference to a flowchart. 2, when the operation knob 10 is operated by the user, the thermal power control unit 16 ignites the stove burner 2 in STEP1.

At this time, the thermal power control unit 16 adjusts the ignition thermal power to the thermal power level "4"

Subsequently, when it is detected in STEP2 that the detected temperature of the pan bottom temperature sensor 7 has reached 200 DEG C or more, the program proceeds to STEP3 where the temperature difference calculating section 18 of the controller 3 calculates the difference between the preset target temperature and the pot And the difference Tk (absolute value) between the detected temperature of the bottom temperature sensor 7 and the detected temperature of the bottom temperature sensor 7 is calculated.

Subsequently, in STEP4, it is judged whether or not the temperature tendency measuring section 19 of the controller 3 has ascended (detected) the detected temperature of the pot bottom temperature sensor 7 Detection temperature ≥ 0).

If the controller 3 determines in STEP 4 that the detected temperature of the pan bottom temperature sensor 7 is rising (inclusive), the controller 3 proceeds to STEP 5. The controller 3 proceeds to STEP5 and proceeds to STEP6 when Tk is 9 DEG C or higher, sets the thermal power control unit 16 to the thermal power level "9 ", and returns to STEP3.

Thereafter, when the Tk is not more than 9 占 폚 in STEP5 as the operation of the controller 3, when Tk is 6 占 폚 or more in STEP7, the process proceeds to STEP8 and the thermal power control unit 16 sets the thermal power level to "6". If Tk is not equal to or higher than 6 [deg.] C in STEP7, if Tk is 5 [deg.] C or higher in STEP9, the process proceeds to STEP10 and the thermal power control unit 16 sets the thermal power level to "4". Here, by setting the thermal power level to "4 " which is smaller than" 5 ", the thermal power level can be shortened early and the rise of the detected temperature can be delayed.

If Tk is not 5 [deg.] C or more in STEP9, if Tk is 4 [deg.] C or more in STEP11, the process proceeds to STEP12 and the thermal power control unit 16 sets the thermal power level to "4". If Tk is not equal to or higher than 4 DEG C in STEP11, if Tk is equal to or higher than 3 DEG C in STEP13, the process proceeds to STEP14 and the thermal power control unit 16 sets the thermal power level to "2". Here again, by setting the thermal power level to "2 " which is smaller than" 3 ", the thermal power level can be reduced early and the rise of the detected temperature can be delayed.

If Tk is not equal to or higher than 3 DEG C in STEP13, if Tk is equal to or higher than 2 DEG C in STEP15, the process proceeds to STEP16 and the thermal power control unit 16 sets the thermal power level to "2". If Tk is not equal to or higher than 2 DEG C in STEP15, the process proceeds to STEP17, where the thermal power control unit 16 sets the thermal power level to "1", and the process returns to STEP3.

When it is not determined in STEP4 that the detected temperature of the pan bottom temperature sensor 7 is rising (inclusive), the temperature trend measuring section 19 of the controller 3 detects the temperature of the pan bottom temperature sensor 7 It is regarded that the detected temperature is lowered, and the process proceeds to STEP18. If Tk is equal to or higher than 7 [deg.] C in STEP18, the process proceeds to STEP19, where the thermal power control unit 16 sets the thermal power level to "9" and returns to STEP3. If Tk is not 7 deg. C or more in STEP18, the process proceeds to STEP20. If Tk is equal to or higher than 6 [deg.] C in STEP20, the process proceeds to STEP21, where the thermal power control unit 16 sets the thermal power level to 6 and returns to STEP3.

Then, when the detected temperature of the pan bottom temperature sensor 7 is falling, the difference Tk between the target temperature and the detected temperature of the pan bottom temperature sensor 7 gradually increases. When Tk is 1 占 폚, the process proceeds to STEP30 through STEP28, and the thermal power control unit 16 sets the thermal power level to "1". When Tk reaches 2 DEG C, the process proceeds to STEP29 through STEP28, and the thermal power control unit 16 sets the thermal power level to "2".

When Tk reaches 3 DEG C, the process proceeds to STEP27 through STEP26, and the thermal power control unit 16 sets the thermal power level to "4". Here, by setting the thermal power level to "4 " which is larger than" 3 ", it is possible to delay the lowering of the detected temperature by making the thermal power level early.

When Tk reaches 4 DEG C, the process proceeds to STEP25 through STEP24, and the thermal power control unit 16 sets the thermal power level to "4". When Tk reaches 5 占 폚, the process proceeds to STEP23 through STEP22, and the thermal power control unit 16 sets the thermal power level to "6". Here, by setting the thermal power level to "6 " which is larger than" 5 ", it is possible to delay the lowering of the detection temperature by increasing the thermal power level early.

As described above, when the detection temperature of the pan bottom temperature sensor 7 is rising, the controller 3 detects the detection temperature and the target temperature (the predetermined range) in the range of the thermal power level "6 & The heating power level is lowered as the difference between the detection temperature and the detection temperature decreases in the range of the thermal power level "6" to "1 " The thermal power level is increased as the difference Tk from the target temperature increases. Then, when Tk is a predetermined value (when the temperature is rising or falling, both at 5 占 폚 and 3 占 폚), the thermal power control section 16 changes the thermal power level in plural steps. According to this, when the temperature of the cooking container rises, the temperature rise of the cooking container is delayed early as the detected temperature becomes close to the target temperature, so that the excessive temperature rise can be suppressed, The temperature change of the cooking container can be delayed earlier as the detected temperature becomes farther away from the target temperature so that the fluctuation range of the temperature of the cooking container with respect to the target temperature can be reduced.

According to the controller 3 of the present embodiment, when the detected temperature is in the vicinity of the target temperature, the thermal power level is automatically converted, but when the burner 2 is operated at a different thermal power level than the manual thermal power level set by the user When the combustion is controlled, there is a fear that the user feels embarrassed or mistaken for a failure.

3, a plurality of position indicating portions 10a, 10b, 10c, 10d, and 10e by light emitting elements are provided around the operation knob 10, (10a, 10b, 10c, 10d, and 10e). The light emitting element is adapted to selectively emit light of two colors.

As shown in Fig. 1, the position display units 10a, 10b, 10c, 10d and 10e of the controller 3 are provided for each predetermined rotation angle (manipulated variable) of the operation knob 10, 17).

The position display control unit 17 displays the nine steps of the thermal power level "1" to the thermal power level "9" by using the five position display units 10a, 10b, 10c, 10d, and 10e. 3, 5, 7, and 9 of the thermal power levels as shown in FIG. 4, the light emission patterns of the position display units 10a, 10b, 10c, 10d, , And when the thermal power levels indicate "2", "4", "6", and "8", it is in a blinking state.

Then, the position display control section 17 maintains a state in which the light emitting element of the position display section, which indicates the thermal power level manually set by the user (including the thermal power level at the time of the preset ignition) is emitted in blue, The light emitting element of the position display section that indicates the thermal power level automatically changed by the light emitting element 16 is emitted in red.

According to this, the thermal power level manually set by the user and the thermal power level automatically changed by the thermal power control unit 16 can be clearly discriminated, and it is possible to prevent the user from feeling embarrassed or mistaken for a failure.

In the present embodiment, when the detected temperature of the pan bottom temperature sensor 7 is rising, the heating amount level is decreased by a plurality of stages when the difference between the detected temperature and the target temperature is decreased by 1 占 폚, In the case where the detected temperature of the temperature sensor 7 is decreasing, the heating amount level is increased by a plurality of stages when the difference between the detected temperature and the target temperature is increased by 1 占 폚. However, the present invention is not limited to this, When the detected temperature of the temperature sensor 7 is rising, the heating amount level is decreased by a plurality of stages in accordance with the decrease in the temperature difference between the detected temperature and the target temperature, and when the detected temperature of the pan bottom temperature sensor 7 is falling The heating amount level may be increased by a plurality of stages in accordance with the increase in temperature difference between the detected temperature and the target temperature.

Although the gas stove 1 has been described in the present embodiment, the present invention is not limited to the gas stove 1, and can be applied to, for example, an electromagnetic cooker or an electric furnace. In the case of an electromagnetic cooker or an electric furnace, the same effect as that of the present embodiment can be obtained by controlling the supply power to the induction heating unit and the nichrome wire heater in place of the control of the thermal power for the stove burner 2 as described above .

1 gas stove (heating cooker) 2 stove burner (heating means)
7 pot bottom temperature sensor (temperature detection means) 9 pot (cooking vessel)
10 Operation knobs 10a, 10b, 10c, 10d, 10e Position display unit
16 Thermal Power Control Unit (Heating Control Unit) 17 Position Display Control Unit (Light Emitting Element Control Unit)

Claims (2)

A temperature detecting means for detecting a temperature of the cooking vessel; and a control means for controlling the heating means to increase the heating amount of the heating means when the detected temperature of the temperature detecting means is less than a preset target temperature And a heating control means for decreasing a heating amount of the heating means when the detected temperature is higher than the target temperature,
The heating means can adjust the amount of heating for each heating amount level obtained by dividing the heating amount range from the minimum heating amount to the maximum heating amount into a plurality of stages,
Wherein the heating control means controls the heating control means in accordance with a decrease in the temperature difference between the detected temperature and the target temperature in a predetermined number of stages of the total heating amount levels when the detected temperature of the temperature detection means is rising When the detected temperature of the temperature detecting means is lowered, the heating amount level is decreased in accordance with the increase in the temperature difference between the detected temperature and the target temperature in a predetermined range of the total heating amount levels, Wherein a plurality of stages are formed. The method according to claim 1,
A plurality of position display sections which display respective heating level levels corresponding to an operation amount of the operation knob, and a plurality of position display sections provided in the respective position display sections, A light emitting element which can emit light and a light emitting element of a position display section which indicates a heating amount level set by an operation are lighted and when the heating amount level is changed by the heating control means, The light emitting element of the position display section is maintained in a light emitting state and the light emitting element of the position display section indicating the heating amount level changed by the heating control means is changed to a color different from the light emitting element of the position display section indicating the heating amount level set by the user And a light-emitting element control means for causing the light-emitting element to emit light.

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