KR20150132698A - Cooling motor controlling apparatus for electric cooker - Google Patents

Abstract

The present invention relates to a cooling motor control device of an electric cooker which particularly efficiently cools inner components of the electric cooker by varying a rotation speed of a cooling motor with respect to the temperature of a surrounding area. The cooling motor control device includes: a heating unit which heats a cooking vessel; a cooling motor unit which cools the inside of the electric cooker by rotation of a fan; a first temperature sensing unit which senses the temperature of a surrounding area; a second temperature sensing unit which detects the temperature of the cooking vessel; and a control unit which controls the heating unit according to a cooking algorithm, and varies the speed of the cooking motor unit with respect to the temperature of a surrounding area sensed by the first temperature sensing unit or varies the number of steps of the rotation speed of the cooling motor unit.

Description

TECHNICAL FIELD [0001] The present invention relates to a cooling motor control apparatus for an electric cooking apparatus,

The present invention relates to a cooling motor control apparatus for an electric cooking apparatus, and more particularly, to a cooling motor control apparatus for an electric cooking apparatus that efficiently cools internal components of an electric cooking apparatus by varying a rotation speed of a cooling motor based on environmental temperature.

Recently, there are many kitchen appliances for various cooking at home. For example, various functions are added to an electric rice cooker, an electric induction heater, an electric pressure cooker, an electric oven range, a microwave oven, an induction range, etc. (hereinafter, referred to as an electric cooker).

Since the electric cooker has a rectifying element (for example, a bridge circuit or the like) and a switch element (for example, an IGBT or the like) for rectifying the commercial AC power applied from the outside, heat generation is a problem during operation . In order to solve such a heat generation, the electric cooker has a fan and a cooling motor part composed of a cooling motor for driving the fan.

The conventional cooling motor unit rotates the fan at a constant rotation speed during operation of the electric cooker to prevent damage or breakage of the internal parts. The cooling motor unit according to the related art operates at a constant rotation speed irrespective of the environmental temperature (the ambient temperature of the electric cooker), and when the ambient temperature becomes high (for example, during a hot summer season) Or breakage.

Further, in the conventional electric cooker, the cooling motor unit is operated at a constant rotation speed irrespective of the heating amount according to the cooking algorithm, so that even when the heating amount is low, the cooling motor unit is unnecessarily rotated at high speed, And there is a problem that noise is generated.

The present invention relates to an electric cooker for changing the rotational speed of a cooling motor unit based on an environmental temperature of an electric cooker or a cooking algorithm according to a cooking algorithm or a temperature at which heat generation of internal components is intensified, And to provide a cooling motor control device.

A cooling motor control apparatus for an electric cooker according to the present invention includes a heating unit for heating a cooking vessel, a cooling motor unit for cooling the inside of the electric cooking apparatus by rotating the fan, a first temperature sensing unit for detecting an ambient temperature, And a control unit for controlling the heating unit according to the cooking algorithm to vary the speed of the cooling motor unit based on the environmental temperature from the first temperature sensing unit, And a control unit for variably controlling the number of the steps.

Preferably, the control unit determines the environmental condition based on the environmental temperature from the first temperature sensing unit for a reference time after the start of cooking.

It is preferable that the environmental condition includes a high-temperature environment and a low-temperature environment.

In addition, it is preferable that the control unit controls the cooling motor unit at a higher speed in the high-temperature environment than in the low-temperature environment.

When the target temperature included in the cooking algorithm is equal to or higher than the first reference temperature, or when the detected temperature of the second temperature detector is equal to or higher than the pre-stored heating deepening temperature, It is preferable to control it at the maximum speed.

The control unit preferably controls the cooling motor unit at a maximum speed when the amount of heating according to the cooking algorithm is equal to or larger than a reference value.

In addition, it is preferable that the heating intensification temperature is set according to a menu to be cooked.

Preferably, the control unit controls the number of steps of the rotation speed of the cooling motor unit in the high temperature environment to be larger than the number of the rotation speed steps of the cooling motor unit in the low temperature environment.

In the high temperature environment, when the target temperature included in the cooking algorithm is equal to or higher than the first reference temperature and the amount of heating according to the cooking algorithm is equal to or greater than the reference value, The control unit controls the cooling motor unit to the maximum speed when the temperature of the second temperature detection unit is equal to or higher than the second reference temperature and the temperature of the second temperature detection unit is higher than the second reference temperature It is preferable to control the cooling motor section at an intermediate speed between the minimum speed and the maximum speed.

If the target temperature included in the cooking algorithm in the low temperature environment is equal to or higher than the first reference temperature and the amount of heating according to the cooking algorithm is equal to or greater than the reference value, The control unit controls the cooling motor unit to the maximum speed when the temperature of the second temperature detection unit is equal to or higher than the second reference temperature and the temperature of the second temperature detection unit is higher than the second reference temperature It is preferable to control the cooling motor section at the lowest speed.

The present invention is based on the environmental temperature of the electric cooker and controls the rotation speed of the cooling motor part through control of a higher speed or a speed step control in a high temperature environment than in a low temperature environment to prevent damage and damage due to heat generation of internal parts .

The present invention also provides a method of controlling a cooling rate of a cooling motor unit by changing a rotational speed of a cooling motor unit so that cooling is performed more strongly when a heating amount is higher than when a heating amount is low, And has an effect of preventing breakage.

In addition, the present invention reflects the cooking characteristics of the menu and the characteristics of the internal components based on the temperature at which heat generation of the internal components intensifies according to the cooking algorithm, thereby varying the rotational speed of the cooling motor unit, There is an effect of preventing damage and breakage.

1 is a configuration diagram of a cooling motor control device for an electric cooker according to the present invention.
Fig. 2 is a flowchart of a first embodiment of a cooling motor control process performed by the cooling motor control apparatus of Fig. 1; Fig.
3 is a flowchart of a second embodiment of a cooling motor control process performed by the cooling motor control apparatus of FIG.
4 is a flowchart of a third embodiment of a cooling motor control process performed by the cooling motor control apparatus of Fig.
5 is a temperature graph of the electric cooker during the execution of a cooking algorithm including a cooling motor control process according to the first embodiment of FIG.
6A and 6B are temperature graphs according to the prior art and the first embodiment.
7 is a temperature graph of the electric cooker while performing a cooking algorithm including a cooling motor control process according to the second embodiment of FIG.
8A and 8B are temperature graphs according to the prior art and the second embodiment.
9 is a temperature graph of the electric cooker while performing a cooking algorithm including a cooling motor control process according to the third embodiment of FIG.

Hereinafter, the present invention will be described in detail with reference to embodiments and drawings.

1 is a configuration diagram of a cooling motor control device for an electric cooker according to the present invention. A cooling motor control device for an electric cooker includes a first temperature sensing part (1) for detecting an ambient temperature around an electric cooking appliance, a second temperature sensing part (3) for detecting a temperature of the cooking container inserted and seated inside the electric cooking appliance, An input unit 5 for obtaining a menu selection from the user, a cooking start input, etc., a heating unit 7 for heating the cooking vessel, a fan, and a motor connected to the fan, A display unit 11 for displaying information such as a menu and a cooking process, and a control unit for controlling the above-described components to control the first temperature sensing unit 1 and the second temperature sensing unit 3 And a control unit 20 for controlling the speed of the cooling motor unit 9, in particular. However, in the present embodiment, a power supply unit (not shown) that receives a commercial power supply and supplies a necessary voltage to the components described above corresponds to a technology that is well known to those skilled in the art The description thereof is omitted.

In detail, the first temperature sensing unit 1 is located on the outer surface of the electric cooker or on the front panel on which the input unit 5 and the display unit 11 are installed to detect the ambient temperature around the electric cooker, And the second temperature detector 3 is attached to or adjacent to the cooking vessel in which the food is received and detects the temperature of the cooking vessel and applies the detected temperature to the controller 20. [

 The input unit 5, the heating unit 7, the cooling motor unit 9, and the display unit 11 correspond to technologies that are well known to those skilled in the art, and the description thereof is omitted .

Next, the control unit 20 maintains the standby state when the external power is applied, performs the cooking algorithm pre-stored by selecting the menu through the input unit 5 and inputting the cooking start in the standby state, And controls the cooling motor unit 9 to cool the internal components that generate heat to perform air cooling.

The control unit 20 controls the environment temperature from the first temperature sensing unit 1 for a reference time (for example, 5 seconds) from the start of the cooking algorithm in response to the cooking start input from the input unit 5, To determine the environmental condition. For example, the control unit 20 determines the environmental condition by averaging the environmental temperatures from the first temperature sensing unit 1 during the reference time. This environmental condition includes a high temperature environment and a low temperature environment which are at least two temperature bands, and in another embodiment, can be divided into a plurality of temperature bands (e.g., high temperature / medium temperature / low temperature environment). The control unit 20 variably controls the maximum speed of the cooling motor unit 9 or the number of steps of the rotation speed of the cooling motor unit 9 based on the determined environmental condition.

The control unit 20 controls the rotation speed of the cooling motor unit 9 based on at least one target temperature included in the cooking algorithm while performing the cooking algorithm according to the cooking order.

Further, the control unit 20 controls the rotation speed of the cooling motor unit 9 on the basis of the heating amount according to the cooking algorithm while performing the cooking algorithm in accordance with the cooking order.

The control unit 20 controls the rotation speed of the cooling motor unit 9 based on the detection temperature from the second temperature detection unit 3 while performing the cooking algorithm in accordance with the cooking order.

Also, the controller 20 stores the temperature at which the heat of the internal components is intensified (the heating intensification temperature) according to the cooking algorithm and controls the rotation speed of the cooling motor unit 9 based on the stored heating intensification temperature.

The cooling motor control process performed by the control unit 20 will be described in detail through the following first to third embodiments.

Fig. 2 is a flowchart of a first embodiment of a cooling motor control process performed by the cooling motor control apparatus of Fig. 1; Fig.

In step S11, the control unit 20 receives external power and performs a standby state. The control unit 20 displays menu information and the like through the display unit 11. [

In step S13, the control unit 20 determines whether the selection of the menu and the cooking start input for the selected menu or the cooking start input for the predetermined menu are obtained through the input unit 5. If the control unit 20 has obtained the cooking start input, the process proceeds to step S15; otherwise, the standby state of step S11 is maintained.

In step S15, the control unit 20 starts a cooking algorithm corresponding to the selected or preset menu, and performs cooking.

In step S17, the control unit 20 acquires the environmental temperature from the first temperature sensing unit 1, and compares the environmental temperature with the pre-stored environmental reference temperature. If the obtained environmental temperature is equal to or higher than the environmental reference temperature, the control unit 20 proceeds to step S19 to perform the cooling motor control process in the high temperature environment. Otherwise, the control unit 20 proceeds to step S35, And performs a cooling motor control process in a low temperature environment. The environmental reference temperature may be set at, for example, 30 DEG C, the high temperature environment may be, for example, summer, and the low temperature environment may include, for example, spring, autumn and winter. Also, after the electric cooker has completely performed the cooking algorithm, it is necessary to perform an additional cooking algorithm continuously or before the electric cooker is cooled sufficiently below the environmental reference temperature. In such a case, The cooling motor control process is performed.

In step S19, the control unit 20 recognizes the current environmental condition as a high temperature environment, and performs a cooling motor control process in a high temperature environment.

In step S21, the control unit 20 compares the target temperature of the cooking algorithm currently being executed with the previously stored first reference temperature. The target temperature corresponds to the temperature set in accordance with the cooking sequence in the cooking algorithm of each menu. For example, the soaking process, the heating process, and the moxibustion process are performed in the white rice menu, and the heating process includes a plurality of target temperatures. In this embodiment, the first reference temperature is 85 deg.

If the current target process temperature is equal to or higher than the first reference temperature, the control unit 20 proceeds to step S23, otherwise proceeds to step S27.

In step S23, the control unit 20 compares the heating amount according to the cooking algorithm with a previously stored reference value. The heating amount is calculated by using the control output and the heating duty ratio. The control output is the magnitude of the output to be applied to the food through the heating unit 7 by the control unit 20, . ≪ / RTI > In this embodiment, the heating amount is calculated by multiplying the control output and the heating duty ratio, and the reference value corresponds to the heating amount at the time when the heating amount is increased, for example, 500 W.

If the heating amount based on the cooking algorithm is equal to or larger than the reference value, the process proceeds to step S25, and if not, the process proceeds to step S27.

In step S25, the control unit 20 controls the rotational speed of the cooling motor unit 9 at the maximum speed to perform rapid and sufficient cooling of the internal parts.

In step S27, the control unit 20 controls the rotation speed of the cooling motor unit 9 to the lowest speed, thereby improving the cooling efficiency while reducing the noise.

In step S29, if the elapsed time from step S25 is greater than or equal to the pre-stored set time using the built-in timer, the process proceeds to step S33; otherwise, Perform speed control. In another embodiment, when the heating unit 7 includes an inverter control unit and performs heating for the cooking vessel in an inverter manner, the inverter control unit may control the signal applied periodically (for example, Fosc signal or the like) ) May be used. The control unit 20 compares the number of applied signals with the pre-stored set number, and if the number of applied signals is equal to or greater than the pre-stored set number, the control unit 20 proceeds to step S33, The process proceeds to step S25. The same applies to the flowchart and the example including the step of comparing the elapsed time and the set time as in step S29.

If the elapsed time from step S27 is greater than or equal to the pre-stored set time using the built-in timer, the control unit 20 proceeds to step S33. If not, the control unit 20 proceeds to step S33, Perform speed control.

In step S33, the control unit 20 determines whether cooking for the selected or preset menu has been completed. If the cooking is completed, the cooling motor control process in the high temperature environment is terminated. Otherwise, the process proceeds to step S21 to perform the cooking process according to the following cooking algorithm and the cooling motor control process.

In step S35, the control unit 20 recognizes the current environmental condition as a low-temperature environment and performs a cooling motor control process in a low-temperature environment.

Step S37 is performed in the same manner as in step S21 described above. The control unit 20 proceeds to step S39 if the current target process temperature is equal to or higher than the first reference temperature, and otherwise proceeds to step S45.

In step S39, it is performed in the same manner as in step 23 described above. If the heating amount based on the cooking algorithm is equal to or larger than the reference value, the process proceeds to step S41, and if not, the process proceeds to step S45.

In step S41, the control unit 20 controls the rotation speed of the cooling motor unit 9 to the intermediate speed which is the maximum speed of the step S25 and the minimum speed of the step S27.

In step S43, if the elapsed time from step S41 is greater than or equal to the pre-stored set time using the built-in timer, the control unit 20 proceeds to step S49; otherwise, in step S41, Perform speed control.

In step S45, the control unit 20 controls the rotation speed of the cooling motor unit 9 to the lowest speed as in step S27.

In step S47, if the elapsed time from step S45 is greater than or equal to the pre-stored set time using the built-in timer, the process proceeds to step S49; otherwise, Perform speed control.

In step S49, the control unit 20 determines whether the cooking for the selected or preset menu is terminated. If the cooking is completed, the cooling motor control process in the low temperature environment is terminated. If not, the process proceeds to step S37 to perform the cooking process according to the following cooking algorithm and the cooling motor control process.

2, the control unit 20 controls the cooling motor unit 9 at a speed higher than the intermediate speed, which is the maximum speed in the high temperature environment and the maximum speed in the low temperature environment, Damage and damage are prevented. In the low temperature environment, since the temperature of the outside air is low, the power consumption and noise are reduced through the medium speed control and the lowest speed control. That is, since the temperature of the outside air is low in the low temperature environment, the control unit 20 can achieve the same cooling effect while controlling the cooling motor unit 9 at a lower rotational speed than the high temperature environment.

 The control unit 20 may selectively perform the steps S21 and S23 after the step S19 or change the order of performing the steps S37 and S39 after the step S35, Or by changing the order of execution.

3 is a flowchart of a second embodiment of a cooling motor control process performed by the cooling motor control apparatus of FIG.

Steps S61 to S67 are performed in the same manner as steps S11 to S17 in Fig. 2, respectively.

In step S69, the control unit 20 recognizes the current environmental condition as a high-temperature environment, and performs a cooling motor control process in a high-temperature environment.

In step S71, it is performed in the same manner as in step S21 of FIG. The control unit 20 proceeds to step S73 if the current target process temperature is equal to or higher than the first reference temperature, and otherwise proceeds to step S85.

In step S73, it is performed in the same manner as step S23 in Fig. If the heating amount based on the cooking algorithm is equal to or greater than the reference value, the process proceeds to step S75, and if not, the process proceeds to step S85.

In step S75, the control unit 20 acquires the detected temperature from the second temperature sensing unit 3, and compares the detected temperature with the previously stored second reference temperature. If the detected temperature temperature is equal to or higher than the second reference temperature, the process proceeds to step S81; otherwise, the process proceeds to step S77. The second reference temperature is a temperature at the time when the heat generation of the internal components becomes maximum, for example, set at 105 占 폚. In addition, the second reference temperature may be a temperature at which the additional operation of the electric cooker is performed.

In step S77, the control unit 20 controls the cooling motor unit 9 at an intermediate speed between the maximum speed and the minimum speed.

If the elapsed time from step S77 is greater than or equal to the pre-stored set time using the built-in timer, the control unit 20 proceeds to step S89. Otherwise, the control unit 20 proceeds to step S77 Perform speed control.

In step S81, the control unit 20 controls the cooling motor unit 9 at the maximum speed. Since the noise at the maximum speed control of the cooling motor unit 9 is considerably low compared to the operating noise of the pressure shoe, the control of the cooling motor unit 9 at the maximum speed is performed at the time of additional pressure operation, Excessive noise influence is prevented from being given to the user despite the maximum speed control of the control device (9).

In step S83, if the elapsed time from step S81 is equal to or greater than the pre-stored set time using the built-in timer, the process proceeds to step S89; if not, Perform speed control.

In step S85, the control unit 20 controls the cooling motor unit 9 at the minimum speed.

In step S87, if the elapsed time from step S85 is equal to or greater than the pre-stored set time using the built-in timer, the control unit 20 proceeds to step S89; otherwise, Perform speed control.

In step S89, the control unit 20 determines whether the cooking for the selected or preset menu is terminated. If the cooking is completed, the cooling motor control process in the high temperature environment is terminated. If not, the process proceeds to step S71 to perform the cooking process and the cooling motor control process according to the following cooking algorithm.

In step S91, the control unit 20 recognizes the current environmental condition as the low-temperature environment and performs the cooling motor control process in the low-temperature environment.

In step S93, it is performed in the same manner as in step S71 described above. If the current target process temperature is equal to or higher than the first reference temperature, the control unit 20 proceeds to step S95. If not, the process proceeds to step S103.

In step S95, it is performed in the same manner as in step S73 described above. If the amount of heating according to the cooking algorithm is equal to or greater than the reference value, the process proceeds to step S97, and if not, the process proceeds to step S103

In step S97, the control unit 20 is performed in the same manner as in step S75 described above. If the detected temperature temperature is equal to or higher than the second reference temperature, the process proceeds to step S99, and if not, the process proceeds to step S103.

In step S99, the control unit 20 controls the cooling motor unit 9 at the maximum speed.

In step S101, the control unit 20 proceeds to step S107 if the elapsed time from step S99 is greater than or equal to the pre-stored preset time using the built-in timer, Perform speed control

In step S103, the control unit 20 controls the cooling motor unit 9 at the minimum speed.

In step S105, the control unit 20 proceeds to step S107 if the elapsed time from step S103 is greater than or equal to the pre-stored preset time using the built-in timer, Perform speed control.

In step S107, the control unit 20 determines whether the cooking for the selected or preset menu is finished. If the cooking is completed, the cooling motor control process in the low-temperature environment is terminated. Otherwise, the process proceeds to step S93 and the cooking process and the cooling motor control process according to the following cooking algorithm are performed.

In the cooling motor control process in the high-temperature environment composed of the above-described steps S69 to S89, the drive is performed in the steps S77 (intermediate speed), S81 (maximum speed) and S85 In step S99 (maximum speed), (S103) in the cooling motor control process in the low-temperature environment composed of the above-described steps S91 to S107, the rotational speed of the motor section 9 is controlled in three stages, (Minimum speed), the rotational speed of the drive motor unit 9 is controlled in two stages. That is, the control unit 20 distinguishes at least two environmental conditions (high temperature / low temperature environment) on the basis of the environmental temperature and sets the number of rotation speed steps of the drive motor unit 9 as And controls it.

The control unit 20 may selectively perform the steps S71, S73, and S75 after the step S69 or change the order of execution thereof, and after step S91, (S95) and (S97) may be selectively performed or the order of execution may be changed.

4 is a flowchart of a third embodiment of a cooling motor control process performed by the cooling motor control apparatus of Fig. For the performance of the third embodiment, the control unit 20 stores the heating intensification temperature of each menu.

Steps S121 to S127 are performed in the same manner as steps S11 to S17 in Fig. 2, respectively.

In step S129, the control unit 20 recognizes the current environmental condition as a high temperature environment, and performs a cooling motor control process in a high temperature environment.

In step S131, the control unit 20 compares the detected temperature from the second temperature sensing unit 3 with the heating intensification temperature of the menu (cooking algorithm) to be performed. If the detected temperature is equal to or higher than the exothermic increasing temperature, the process proceeds to step S133, and if not, the process proceeds to step S139.

In step S133, it is performed in the same manner as in step S23 of FIG. If the heating amount based on the cooking algorithm is equal to or larger than the reference value, the process proceeds to step S135, and if not, the process proceeds to step S139.

In step S135, the control unit 20 controls the cooling motor unit 9 at the maximum speed.

In step S137, if the elapsed time from step S135 is greater than or equal to the pre-stored set time using the built-in timer, the control unit 20 proceeds to step S143; otherwise, Perform speed control.

In step S139, the control unit 20 controls the cooling motor unit 9 at the lowest speed.

In step S141, if the elapsed time from step S139 is greater than or equal to the pre-stored set time using the built-in timer, the process proceeds to step S143; otherwise, the control unit 20 proceeds to step S139 Perform speed control.

In step S143, the control unit 20 determines whether cooking for the selected or preset menu has been completed. If the cooking is completed, the cooling motor control process in the high temperature environment is terminated. If not, the process proceeds to step S131 to perform the cooking process and the cooling motor control process according to the following cooking algorithm.

In step S145, the control unit 20 recognizes the current environmental condition as the low-temperature environment, and performs the cooling motor control process in the low-temperature environment.

In step S147, the control unit 20 compares the detected temperature from the second temperature sensing unit 3 with the heating intensification temperature of the menu (cooking algorithm) to be performed. If the detected temperature is equal to or higher than the exothermic increasing temperature, the process proceeds to step S149, and if not, the process proceeds to step S155.

In step S149, it is performed in the same manner as step S23 in Fig. If the heating amount based on the cooking algorithm is equal to or greater than the reference value, the process proceeds to step S151, and if not, the process proceeds to step S155.

In step S151, the control unit 20 controls the cooling motor unit 9 at an intermediate speed between the maximum speed and the minimum speed.

In step S153, the controller 20 proceeds to step S159 if the elapsed time from step S151 is greater than or equal to the pre-stored set time using the built-in timer. Otherwise, the control unit 20 proceeds to step S151 Perform speed control.

In step S155, the control unit 20 controls the cooling motor unit 9 at the minimum speed.

In step S157, the controller 20 proceeds to step S159 if the elapsed time from step S155 is greater than or equal to the pre-stored set time using the built-in timer, Perform speed control.

In step S159, the control unit 20 determines whether the cooking for the selected or preset menu is terminated. If the cooking is completed, the cooling motor control process in the low-temperature environment is terminated. Otherwise, the process proceeds to step S147 to perform the cooking process and the cooling motor control process according to the following cooking algorithm.

4, the control unit 20 controls the cooling motor unit 9 faster than the intermediate speed, which is the maximum speed in the low temperature environment, in the high temperature environment. In the high temperature environment, Prevent damage. In addition, since the temperature of the outside air is low in the low temperature environment, the internal parts can be efficiently cooled even if the temperature is controlled at a lower speed than the high temperature condition, thereby reducing power consumption and noise through the intermediate speed control and the lowest speed control.

The controller 20 may selectively perform the steps S131 and S133 after the step S129 or change the order of performing the steps S131 and S133 and perform steps S147 and S149 after the step S145, Or may be performed by changing the order of execution thereof.

FIG. 5 is a graph of the temperature of the electric cooker during the execution of the cooking algorithm including the cooling motor control process according to the first embodiment of FIG. 2. In the process of cooking the white rice menu according to the flowchart of FIG. 2, 2 is a graph of the detected temperature from the second temperature sensing unit 3. Fig.

Cooking algorithms for the cooking of white rice consist of atmospheric process, boiling process, cooking process and moxibustion process. The control unit 20 performs the atmospheric process, the calling process, the cooking process, and the moxibustion process according to the cooking sequence.

First, the speed control process in high temperature environmental conditions is explained. The control unit 20 performs the atmospheric process (detailed process 1), the calling process (detailed process 2), the cooking process (detailed processes 3 to 4), and the moxibustion process (detailed process 5) in accordance with the cooking sequence.

The control unit 20 performs the waiting process and the calling process while the target temperatures of the waiting process and the calling process are 0 DEG C and 60 DEG C, respectively, so that the process proceeds from step S21 to step S27, Control at the lowest speed. The control unit 20 carries out the cooking process using the detection temperature from the second temperature sensing unit 3, and carries out the cooking process (detailed processes 3 and 4) according to the cooking sequence. The control unit 20 proceeds to step S27 because the target temperature (80 DEG C) of the detailed process 3 of the cooking process is lower than the first reference temperature while controlling the cooking process in step S21 so as to control it to the lowest speed. Thereafter, when the detected temperature from the second temperature sensing unit 3 exceeds the target temperature of the detailed process 3, the control unit 20 performs the detailed process 4 according to the cooking sequence. The control unit 20 proceeds to step S23 while the target temperature 110 DEG C of the subordinate step 4 is higher than the first reference temperature in step S21 while performing the subordinate step 4. In step S23, Since the amount of heating (control output x heating duty ratio) in Step 4 of the cooking algorithm is larger than the reference value, the flow advances to Step S25 to control the driving motor portion 9 at the maximum speed. The control unit 20 completes the cooking process and performs the moxibustion process. In step S21, since the target temperature 110 ° C of the moxibustion process 5 is higher than the first reference temperature but the heating amount is 0W, . When the control unit completes the moxibustion process, it is determined that the cooking is finished in step S33, so that the cooling motor control process is terminated.

It is the same as the speed control process in the high temperature environment condition except that the maximum speed control process in the low temperature environmental condition is the intermediate speed in the step S41.

6A and 6B are temperature graphs according to the prior art and the first embodiment. FIG. 6A is a temperature graph in a low-temperature environment, and FIG. 6B is a temperature graph in a high-temperature environment. In this embodiment, the internal part is a rectifying part (bridge diode circuit).

 The cooling motor control process according to the related art is a control of the cooling motor section in the entire cooking process at a constant speed (for example, 2000 rpm). In the present invention according to the first embodiment, the minimum speed (2000 rpm) And the maximum speed (2800 rpm).

As indicated by the circular dotted area in Fig. 6A, the present invention improves the cooling effect more than the prior art by variably controlling the cooling motor section 9 from the lowest speed to the intermediate speed. Further, as indicated by the circular dotted line area in Fig. 6B, the present invention improves the cooling effect of the cooling motor unit 9 from the lowest speed to the maximum speed by the variable control over the prior art. It is also noted that the temperature difference between the temperature graph of the prior art in Fig. 6B and the temperature graph of the present invention is significantly greater than the temperature difference between the temperature graph of the prior art in Fig. 6A and the temperature graph of the present invention. That is, the cooling effect is improved in a high temperature environment.

FIG. 7 is a temperature graph of the electric cooker during the execution of the cooking algorithm including the cooling motor control process according to the second embodiment of FIG. 3, and FIG. 2 is a graph of the detected temperature from the second temperature sensing unit 3. Fig.

First, the speed control process in high temperature environmental conditions is explained. The control unit 20 performs the atmospheric process (detailed process 1), the calling process (detailed process 2), the cooking process (detailed processes 3 to 4), and the moxibustion process (detailed process 5) in accordance with the cooking sequence.

The control unit 20 performs the atmospheric process and the nominal process while the target temperatures of the atmospheric process and the nominal process are 0 DEG C and 60 DEG C, respectively, so that the process proceeds from step S71 to step S85, Control at the lowest speed. The control unit 20 carries out the cooking process using the detection temperature from the second temperature sensing unit 3, and carries out the cooking process (detailed processes 3 and 4) according to the cooking sequence. Since the target temperature (80 deg. C) of the detailed process 3 of the cooking process is lower than the first reference temperature in step S71, the control unit 20 proceeds to step S85 so as to control it at the lowest speed while performing the cooking process. Thereafter, when the detected temperature from the second temperature sensing unit 3 exceeds the target temperature of the detailed process 3, the control unit 20 performs the detailed process 4 according to the cooking sequence. The control unit 20 proceeds to step S73 while the target temperature 110 deg. C of the sub-process 4 is higher than the first reference temperature in step S71 while performing the sub-step 4. In step S73, Since the amount of heating (control output x heating duty ratio) in Step 4 of the cooking algorithm is larger than the reference value, the process proceeds to Step S75. In step S75, the control unit 20 proceeds to step S77 to perform the intermediate speed control because the detected temperature from the second temperature sensing unit 3 is lower than the second reference temperature. If the detected temperature from the second temperature sensing unit 3 becomes equal to or higher than the second reference temperature during the execution of the sub-process 4, the control unit 20 proceeds from step S75 to step S81, ) At the maximum speed. The control unit 20 completes the cooking process and performs the moxibustion process. In step S71, the target temperature of the moxibustion process 5 is higher than the first reference temperature, but the heating amount is 0W, so that the process proceeds to step S85. When the control unit completes the moxibustion process, it is determined that the cooking is finished in step S89, so that the cooling motor control process is terminated.

The speed control process in the low temperature environment condition is the same as the speed control process in the high temperature environment condition except that the intermediate speed control in the high temperature environment condition is controlled to the lowest speed in step S103.

8A and 8B are temperature graphs according to the prior art and the second embodiment. FIG. 8A is a graph of temperature in a low-temperature environment, and FIG. 8B is a graph of temperature in a high-temperature environment. In this embodiment, the internal part is a rectifying part (bridge diode circuit).

 The cooling motor control process according to the related art is a control of the cooling motor section in the entire cooking process at a constant speed (for example, 2000 rpm), and the present invention according to the second embodiment is characterized in that the minimum speed (2000 rpm) And the maximum speed (2800 rpm).

As indicated by the circular dotted area in Fig. 8A, the present invention improves the cooling effect of the cooling motor unit 9 from the lowest speed to the maximum speed by the variable control over the prior art. Further, as indicated by the circular dotted line area in Fig. 8B, the present invention improves the cooling effect of the cooling motor unit 9 from the lowest speed to the intermediate speed, and from the intermediate speed to the maximum speed, as compared with the prior art. It is also noted that the temperature difference between the temperature graph of the prior art in Fig. 8B and the temperature graph of the present invention is significantly greater than the temperature difference between the temperature graph of the prior art in Fig. 8A and the temperature graph of the present invention. That is, the cooling effect is improved in a high temperature environment.

FIG. 9 is a graph of the temperature of the electric cooker during the execution of the cooking algorithm including the cooling motor control process according to the third embodiment of FIG. 4, 2 is a graph of the detected temperature from the second temperature sensing unit 3. Fig. For execution of the third embodiment, the control unit 20 stores the heating intensification temperature according to the menu. For example, in the case of rice white rice cooking, the heat intensification temperature is 80 ° C, and in the case of grain cooking, the heat intensification temperature is set at 85 ° C.

Cooking algorithms for the cooking of white rice consist of atmospheric process, boiling process, cooking process and moxibustion process. The control unit 20 performs the atmospheric process, the calling process, the cooking process, and the moxibustion process according to the cooking sequence.

First, the speed control process in high temperature environmental conditions is explained. The control unit 20 performs the atmospheric process (detailed process 1), the called process (detailed process 2), the cooking process (detailed process 3 and 4), and the moxibustion process (detailed process 5) according to the cooking sequence.

The controller 20 proceeds to step S139 from step S131 to control the drive motor unit 9 at the minimum speed because the detection temperature is lower than the deepening heat generation temperature while performing the standby process and the calling process. The control unit 20 carries out the cooking process using the detected temperature from the second temperature sensing unit 3, and then carries out the cooking process (detailed processes 3 and 4) according to the cooking process. The control unit 20 proceeds to step S139 to perform control at the minimum speed because the detection temperature in the sub-step 3 of the cooking process is lower than the heat generation intensifying temperature in step S131 while performing the cooking process. Thereafter, when the detected temperature from the second temperature sensing unit 3 exceeds the target temperature of the detailed process 3, the control unit 20 performs the detailed process 4 according to the cooking sequence. The control unit 20 proceeds to step S133 while performing the sub-step 4 and at step S131 the detected temperature in the sub-step 4 is equal to or higher than the exothermic heating temperature, and at step S135, (Control output x heating duty ratio) in step 4 in detail is larger than the reference value, the process proceeds to step S135 to control the drive motor unit 9 at the maximum speed. The control unit 20 completes the cooking process and performs the moxibustion process. In step S21, the detection temperature in the moxibustion process 5 is higher than the heat-generation deepening temperature, but the heating amount is 0W, so the process proceeds to step S139. When the control unit completes the moxibustion process, it is determined that the cooking is finished in step S143, so that the cooling motor control process is terminated.

The speed control process in the high temperature environment condition is the same as the speed control process in the high temperature environment condition except that the maximum speed control process in the low temperature environmental condition is the intermediate speed in the step S151.

The cooling effect of the present invention according to the third embodiment is almost the same as that of Figs. 6A and 6B described above. However, since the first embodiment differs only at a point at which the target temperature is compared with the first reference temperature, the time at which the speed varies may be somewhat different.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the general inventive concept as defined by the appended claims. It is to be understood that modifications are possible and that such modifications are within the scope of the claims.

1: first temperature sensing unit 3: second temperature sensing unit
5: Input unit 7: Heating unit
9: cooling motor section 11: display section
20:

Claims (15)

A heating unit for heating the cooking vessel;
A cooling motor for cooling the inside of the electric cooker by rotation of the fan;
A first temperature sensing unit for sensing an ambient temperature;
A second temperature detector for detecting the temperature of the cooking vessel;
And a control unit for controlling the heating unit according to the cooking algorithm and varying the speed of the cooling motor unit based on the environmental temperature from the first temperature sensing unit or varying the number of steps of the rotation speed of the cooling motor unit Wherein the control unit is configured to control the temperature of the cooling coil. The method according to claim 1,
Wherein the control unit determines the environmental condition based on the environmental temperature from the first temperature sensing unit for a reference time after the start of cooking. 3. The method of claim 2,
Wherein the environmental condition includes a high-temperature environment and a low-temperature environment. The method of claim 3,
Wherein the control unit controls the cooling motor unit at a higher speed in the high-temperature environment than in the low-temperature environment. 5. The method according to any one of claims 1 to 4,
When the target temperature included in the cooking algorithm is equal to or higher than the first reference temperature or when the detected temperature of the second temperature detector is equal to or higher than the previously stored heat generation intensifying temperature, And the control unit controls the cooling motor based on the control signal. 5. The method according to any one of claims 1 to 4,
Wherein the control unit controls the cooling motor unit at a maximum speed when the amount of heating according to the cooking algorithm is equal to or greater than a reference value. 5. The method according to any one of claims 1 to 4,
Wherein the control unit determines that the target temperature included in the cooking algorithm is equal to or higher than the first reference temperature and the amount of heating according to the cooking algorithm is equal to or greater than the reference value, Wherein the control unit controls the cooling motor unit at a maximum speed when the amount of heating according to the cooking algorithm is equal to or higher than a reference value. 5. The method according to any one of claims 1 to 4,
Wherein the control unit determines that the target temperature included in the cooking algorithm is lower than the first reference temperature or the heating amount according to the cooking algorithm is smaller than the reference value, And controls the cooling motor unit at a minimum speed when the amount of heating according to the cooking algorithm is smaller than a reference value. 6. The method of claim 5,
Wherein the heating intensification temperature is set according to a menu to be cooked. 4. The method according to any one of claims 1 to 3,
Wherein the control unit controls the number of steps of the rotational speed of the cooling motor unit in the high temperature environment to be larger than the number of steps of the rotational speed of the cooling motor unit in the low temperature environment. 11. The method of claim 10,
Wherein the control unit controls the cooling motor unit to a maximum speed or an intermediate speed when the target temperature included in the cooking algorithm is equal to or higher than a first reference temperature. 11. The method of claim 10,
Wherein the control unit controls the cooling motor unit at a maximum speed or an intermediate speed when the amount of heating according to the cooking algorithm is equal to or greater than a reference value. 11. The method of claim 10,
Wherein the control unit controls the cooling motor unit at a minimum speed when the target temperature included in the cooking algorithm is lower than the first reference temperature or the amount of heating according to the cooking algorithm is smaller than the reference value, Cooling motor control unit. 11. The method of claim 10,
Wherein the control unit controls the temperature of the second temperature detector to be higher than the first reference temperature when the target temperature included in the cooking algorithm is equal to or higher than the first reference temperature and the heating amount according to the cooking algorithm is equal to or greater than the reference value, And controls the cooling motor unit at the maximum speed if the temperature of the second temperature detection unit is equal to or higher than the second reference temperature. When the temperature of the second temperature detection unit is lower than the second reference temperature And controls the cooling motor unit at an intermediate speed between a minimum speed and a maximum speed. 11. The method of claim 10,
Wherein the control unit controls the temperature of the second temperature detector to be higher than the first reference temperature when the target temperature included in the cooking algorithm in the low temperature environment is equal to or higher than the first reference temperature and the heating amount according to the cooking algorithm is equal to or greater than the reference value, And controls the cooling motor unit at the maximum speed if the temperature of the second temperature detection unit is equal to or higher than the second reference temperature. When the temperature of the second temperature detection unit is lower than the second reference temperature And controls the cooling motor unit at a minimum speed.

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