KR20170004147U - Apparatus for keeping warm of electric pressure rice cooker - Google Patents

Abstract

The present invention relates to a temperature control device for an electric pressure cooker in which a user can arbitrarily set a variable temperature by controlling a user's preference according to user's preference. A temperature sensor for detecting the temperature inside the cooker; A thermostat control unit for controlling the thermostat to maintain the internal temperature of the rice cooker according to the temperature detected by the temperature sensor; And a heat-insulating switching unit for supplying or cutting off the heating power of the heating unit for heating the rice cooker under the control of the thermostat control unit, thereby implementing the thermostatic control apparatus for the electric pressure cooker.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric pressure cooker,

The present invention relates to an electric pressure cooker, and more particularly, in a process of building a rice cooker using a pressure cooker, a relay switch is used to maintain a switch-off state at a predetermined temperature (for example, 110 to 130 ° C) A user opens a valve to discharge the steam, and a user can arbitrarily set a variable keeping temperature according to the user's preference.

Generally, the electric pressure cooker starts the cooking process by putting cooked rice and an appropriate amount of water into a rice cooker, then closing the lid and pressing the cooking button in a pressure state. The cooking process is variously done by electric pressure cooker.

For example, there is an absorption process in which rice is sufficiently absorbed by water to absorb rice, a heating process in which cooking is performed by absorbing water immersed in rice, a steam discharge process in which steam is automatically discharged, Process.

Then, when the cooking is completed, the heat keeping process is maintained through the warming process.

At this time, the heating can not be arbitrarily set by the user, and the heater is maintained by the predetermined fixed keeping temperature preset by the maker of the electric heating cooker.

On the other hand, a conventional technique of controlling cooking and keeping warm by using an electric pressure cooker is disclosed in Patent Document 1 below.

The conventional technology disclosed in Patent Document 1 includes a heater for heating an inner pot, a heater for heating the inner pot to reach a reheat set temperature higher than the heat retaining temperature during the warming process by controlling the heater, And a central processing unit for performing the process.

According to this configuration, it is possible to determine the reheating of the electric pressure cooker and the duration of reheating according to the situation of the electric pressure cooker to maintain a good taste of the rice, and reheat the electric pressure cooker to remove the odor due to the growth of the thermophilic microorganism Prevent deterioration of rice quality and provide warm rice just after cooking.

Registered Utility Model No. 20-0440779 (Registered on June 25, 2008) (Control device of electric pressure cooker)

However, in the conventional electric pressure cooker and the related art, when the cooking is completed, the heating state is maintained through the warming process. At this time, the maker of the electric pressure cooker performs the keeping of the heat only by the predetermined keeping temperature , It can not reflect various symbols of the user.

For example, each user may have his or her desired taste, and the maintenance of such taste is determined by the continuity due to the keeping temperature. However, the prior art and conventional electric pressure cooker have a disadvantage in that they can not satisfy diverse preferences of the user, because the heating is performed only at a keeping temperature that is fixed in a uniform manner.

Accordingly, the present invention has been proposed in order to solve the above-mentioned general electric pressure cooker and the related art problems. In the process of building rice using a pressure cooker, a relay switch is used to set a predetermined temperature (for example, 130 ° C), and when the user reaches a desired temperature, the switch is turned off, and the user opens the valve to discharge the steam. The object of the present invention is to provide a temperature control device for an electric pressure cooker.

Another object of the present invention is to provide a temperature control device for an electric pressure cooker in which a user can arbitrarily set a variable keeping temperature according to user's preference.

Another object of the present invention is to allow a user to set a variable temperature at a constant temperature range (for example, 110 to 130 ° C) and to keep the temperature constant according to the set temperature, And a temperature control device for controlling the temperature of the electric pressure cooker.

In order to achieve the above object, a temperature control apparatus for an electric pressure cooker according to a first embodiment of the present invention includes a keeping temperature setting unit for the user to arbitrarily set a keeping temperature; A temperature sensor for detecting the temperature inside the cooker; An insulated control unit for controlling the insulated temperature to maintain the insulated temperature set according to the temperature detected by the temperature sensor; And a heat-insulating switching unit for supplying or cutting off the heating power of the heating unit for heating the rice cooker under the control of the thermostat control unit.

Wherein the at least one thermal insulation temperature setting unit includes: a display unit for displaying a thermal insulation setting range arbitrarily set by the user; A temperature setting unit for setting a temperature within the keeping setting range; And a variable resistor for setting a control value corresponding to the temperature set by the temperature setting unit.

The heating control unit generates a keeping control signal when the internal temperature of the cooker reaches a preset keep temperature in accordance with the temperature detected by the temperature sensor. When the internal temperature of the cooker becomes lower than the set keep temperature, And a control signal generator for generating a signal.

The heat keeping switching unit includes a relay for supplying or cutting off the heating power to the heating unit according to a control signal generated by the heat keeping control unit.

Wherein the heat keeping switching unit cuts off the heating power supplied to the heating unit if the control signal generated by the heat keeping control unit is a keeping maintenance control signal and supplies the heating power to the heating unit when the control signal is a heating control signal do.

 In addition, the apparatus for controlling the temperature of the electric pressure cooker according to the first embodiment of the present invention includes a variable resistor for varying the control voltage according to the set temperature; A zener diode for making a voltage output through the variable resistor a constant voltage; A switching device for switching to a voltage output through the Zener diode; And a relay switch for turning off the switch in the temperature range set by the user with the current output through the switching element to cut off the heating power.

According to the present invention, in the course of building rice using a pressure cooker, the switch is automatically turned off when the user reaches a desired temperature within a predetermined temperature range (for example, 110 to 130 ° C) by using a relay switch, There are advantages to be able to.

In addition, according to the present invention, since the user can arbitrarily set the warming temperature according to his or her preference, there is an advantage that the taste of the user can be maintained in accordance with the user's taste while satisfying the taste of the user.

In addition, according to the present invention, it is advantageous for the user to satisfy a variety of preference by guiding the user to set a variable temperature at a certain temperature range (for example, 110 to 130 ° C).

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram of a constituent part for temperature control of an apparatus for controlling temperature of an electric pressure cooker according to a first embodiment of the present invention;
FIG. 2 is a block diagram of a temperature control apparatus for an electric pressure cooker according to a first embodiment of the present invention;
3 is a circuit diagram of a temperature control apparatus for an electric pressure cooker according to a second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a temperature control apparatus for an electric pressure cooker according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

( First Embodiment )

FIG. 1 is a circuit diagram for a part of the constitution for temperature control of the temperature control device of the electric pressure cooker according to the first embodiment of the present invention, and FIG. 2 is a block diagram of the constitution block of the temperature control device of the electric pressure cooker according to the first embodiment. .

The temperature control device of the electric pressure cooker according to the present invention includes an operating unit 10, a keeping temperature setting unit 20, a power supply unit 30, a keeping control unit 40, a timer 50, a temperature sensor 60, (70) and a heating unit (80).

In addition to the above-described configuration, the basic constitution of a conventional electric pressure cooker may be included, but is not shown in FIGS. 1 and 2 for clarity of explanation.

The operation unit 10 is basically an input device operated by the user for cooking the electric pressure cooker, and may include a selection button and a cooking button for selecting white rice, brown rice, and the like.

In addition, the keep warm temperature setting unit 20 means an input device by which a user arbitrarily sets a keep warm temperature. The warming temperature setting unit 20 includes a display unit for displaying a range of a set temperature that can be arbitrarily set by a user, a temperature setting unit for setting a temperature within the keeping setting range, And a variable resistor for setting the resistance value.

1 shows only a variable resistor for setting a control value corresponding to a temperature set by a user.

The display unit serves to display a temperature setting range (for example, 110 to 130 DEG C) that can be arbitrarily set by a user using a liquid crystal display (LCD), and the temperature setter may be a variable volume, And may include an increment / decrement button for increasing or decreasing the insulated temperature within the allowable temperature setting range.

In the present invention, for convenience of explanation, it is explained that the keep warm temperature is variably set by using the increase / decrease button.

The power supply unit 30 supplies the operation power of the temperature control unit 40 or the operation power of the temperature sensor 60 and supplies the heating power to the heating unit 80. The timer 50 ) Serves to provide time information for informing the scheduled cooking time, the heating elapsed time, and the like by the warming-up controller 40.

The temperature sensor 60 detects the temperature inside the cooker and transmits the detected temperature to the thermostat control unit 40.

In addition, the thermostat control unit 40 controls the thermostat to maintain the internal temperature of the rice cooker at the preset thermostat temperature according to the temperature detected by the temperature sensor 60.

Here, the thermal insulation controller 40 may be implemented using a control device such as a central processing unit, a microprocessor, a microcomputer, and a controller.

The thermostat control unit 40 generates a thermostat maintaining control signal when the internal temperature of the rice cooker reaches a preset thermostat temperature in accordance with the temperature detected by the temperature sensor 60. When the internal temperature of the rice cooker reaches the set thermostat temperature And a control signal generator for generating a heating control signal when the temperature is lower than the predetermined temperature. The control signal generator may use a switching element as shown in FIG.

The insulated switching unit 70 serves to supply or shut off the heating power of the heating unit 80, which heats the rice cooker under the control of the thermostat control unit 40.

1, the heat insulating switching unit 70 includes a relay 71 that supplies or cuts off the heating power to the heating unit 80 in accordance with a control signal generated by the heat control unit 40 can do.

If the control signal generated by the thermal insulation controller 40 is a thermal insulation control signal, the thermal insulation switching unit 70 blocks the heating power supplied to the heating unit 80. If the control signal is a heating control signal, It is preferable to supply the heating power source to the heating unit 80.

The operation of the temperature control device of the electric pressure cooker according to the present invention will be described in detail as follows.

Users who use an electric pressure cooker set the keep temperature for cooking taste appropriate to their taste or preference at cooking.

Here, the setting of the keeping temperature is performed by setting the keep warm temperature within the settable warm keeping temperature range displayed through the display unit using the warm keeping temperature setting unit 20. [

For example, the taste of rice and the taste of rice may be different for each user.

In other words, there may be users who always want to eat hot rice, and some who want rice with moderate heat. Therefore, a user who wants to always cook very hot may set a high temperature (for example, 125 to 130 ° C) in a set temperature range of warming temperature, and a user who wants low cooked rice may set a low temperature , 110 ~ 115 ° C), and the user who desires a suitable temperature sets the intermediate temperature (116 ~ 124 ° C) in the setting range of keeping temperature. Here, it is preferable to set an arbitrary warming temperature for the temperature setting, then eat the rice for which the actual warming has been performed, and then set the warming temperature by searching for a temperature that matches the taste or taste of the person.

After the keeping temperature is set, if the cooking button is pressed, cooking is performed in the same manner as the cooking process in a general electric pressure cooker.

After the cooking is completed, the warming-up control unit 40 confirms whether or not the warming-up temperature is set by the warming-temperature setting unit 20. If the warming-up temperature is not set, the heating unit 80 to control the temperature.

On the other hand, when the user keeps the warming temperature arbitrarily, the warming temperature is controlled according to the warming temperature set by the warming-temperature setting unit 20. [ That is, ignore the previous fixed set temperature and change the set temperature which is set by the user arbitrarily to the actual keeping temperature.

Next, the warming-up control unit 40 detects the temperature inside the rice cooker by using the temperature sensor 60.

The controller 60 controls the keeping of the internal temperature of the rice cooker according to the temperature detected by the temperature sensor 60 so that the internal temperature of the rice cooker is maintained at the predetermined keep temperature.

For example, when the internal temperature of the rice cooker is compared with the temperature detected by the temperature sensor 60, the internal temperature of the rice cooker is generated when the internal temperature of the rice cooker reaches the variable set keeping temperature, And generates a heating control signal when the temperature becomes lower than the variable set keeping temperature.

As shown in Fig. 1, the control signal can be a switching element (TR, FET) capable of generating a control signal.

When the internal temperature of the rice cooker reaches the preset keeping temperature, the switching element is turned on, and a constant voltage set by the resistor R1 and the zener diode Z1 of the power supply 30 flows through the collector of the switching element And when the internal temperature of the rice cooker becomes lower than the preset keeping temperature, the switching element is turned off, and the output of the emitter is lost. In this case, Control signal. The actual keep-warm control signal electrically means a high signal (5V), and the heating control signal means an electrically low signal (0V).

When the keeping maintenance control signal is generated, a 5-V heat holding control signal is generated in the relay coil of the relay 71 of the heat insulating switching unit 70 to pull the relay switch, The heating power source (AC 220V) is cut off, and the heating operation of the heating unit 80, that is, the driving power source of the heater is cut off.

In this case, the heater is turned off, and the rice cooker maintains the current temperature in the absence of new heating.

When the heating control signal is generated in the heat keeping control unit 40, that is, when the output of the switching device is lost, the temperature of the relay is gradually reduced The current does not flow through the relay coil of the relay switch 71, and the relay switch connected to the relay coil returns to the original position. When the relay switch returns to the original position, the heating unit 80 is again supplied with the heating power, and the heater is driven to generate the heat source, and the rice cooker is heated by the generated heat source.

This operation is repeated in real time until the electric pressure cooker is powered off or the user operates the power off switch.

Accordingly, the user can always maintain a taste of taste that matches his or her preference by setting the temperature of the keeping temperature that matches his / her taste and preference.

( Second Embodiment )

FIG. 3 is a circuit diagram of an apparatus for controlling the temperature of an electric pressure cooker according to a second embodiment of the present invention, which includes a variable resistor VR1 for varying a control voltage in accordance with a set temperature, A switching element Q1 for performing a switching operation to a voltage output through the Zener diode Z2, and a switching element Q1 for switching the current output through the switching element Q1 And a relay switch 80 for turning off the switch in the temperature range (110 to 130 ° C) to shut off the heating power.

In the second embodiment of the temperature control device of the electric pressure cooker according to the present invention configured as described above, when the user sets a desired temperature for improving the taste, the control voltage corresponding to the desired temperature is set by the variable resistor VR1 .

When the temperature is set by the user in the course of cooking rice using the pressure cooker, a control voltage corresponding to the set temperature is outputted by the variable resistor VR1. The control voltage thus outputted is converted into a constant voltage by the Zener diode Z2 and applied to the base terminal of the switching element Q1.

The switching element Q1 is turned on when the applied control voltage is higher than the turn-on voltage, and outputs the current of the collector to the emitter.

The current outputted to the emitter flows to the relay coil of the relay switch 80, so that the relay switch operates and automatically maintains the heating power in the off state when the temperature reaches the user's desired temperature automatically.

That is, when the user reaches a desired temperature, the relay switch is turned off to cut off the heating power and maintain the current state.

After completing the cooking with the above process, when the user opens the valve provided separately for the purpose of discharging the steam, the steam inside the cooker is discharged to the outside.

Therefore, when the user keeps the temperature suitable for his / her taste, he or she drains the steam when necessary, so that the user can always provide the best taste desired by the user.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, and that various changes and modifications within the scope of the invention, It is obvious to those who have.

10:
20: Insulating temperature setting unit
30:
40:
50: Timer
60: Temperature sensor
70:
71: Relay switch
80:

Claims (6)

An apparatus for controlling temperature in an electric pressure cooker,
A variable resistor for varying the control voltage according to the set temperature;
A zener diode for making a voltage output through the variable resistor a constant voltage;
A switching device for switching to a voltage output through the Zener diode; And
And a relay switch for turning off the switch in the temperature range set by the user with the current output through the switching element to shut off the heating power.
An apparatus for controlling temperature in an electric pressure cooker,
A keeping temperature setting unit for the user to arbitrarily set a keeping temperature;
A temperature sensor for detecting the temperature inside the cooker;
A thermostat control unit for controlling the thermostat to maintain the internal temperature of the rice cooker at a preset thermostat temperature according to the temperature detected by the temperature sensor; And
And a thermostat switching unit for supplying or cutting off the heating power of the heating unit for heating the rice cooker under the control of the thermostat control unit.
[2] The apparatus of claim 2, wherein the keep-warm temperature setting unit comprises: a display unit for displaying a set range of the keep-warm setting that can be arbitrarily set by a user; A temperature setting unit for setting a temperature within the keeping setting range; And a variable resistor for setting a control value corresponding to a temperature set by the temperature setting unit.
The rice cooker according to claim 2, wherein the thermostat control unit generates a thermostat maintaining control signal when the internal temperature of the rice cooker reaches the preset thermostat temperature in accordance with the temperature detected by the temperature sensor, And a control signal generator for generating a heating control signal when the temperature of the cooker is lowered.
The apparatus of claim 4, wherein the heat-insulating switching unit includes a relay for supplying or cutting off the heating power to the heating unit according to a control signal generated by the heat-insulating control unit.
The heating switching unit may be configured such that when the control signal generated in the heat retaining control unit is an insulated maintenance control signal, the heat insulating switching unit cuts off the heating power supplied to the heating unit and supplies the heating power to the heating unit if the control signal is a heating control signal Wherein said temperature control device is a temperature control device for an electric pressure cooker.

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