KR102354272B1 - Electric cooker - Google Patents

Abstract

The present invention relates to an electric cooker that performs a cooking process by accurately determining whether a lid is opened or closed using a lock detection unit for a lid coupling handle and an open/close detection unit for the lid.
The electric cooker according to the present invention includes an input unit for obtaining a user input, a heating unit comprising an upper side, a side side, and a lower side heating unit for heating the upper side, the side side, and the lower side of the inner pot, respectively, and the locked and open state of the lid coupling handle formed on the lid A lock detection unit for sensing, an opening/closing detection unit formed on the body or lid to detect a closed state and an open state of the lid, and performing a standby state, a cooking process, and a warming process according to a user input from the input unit, , determining the locked state of the lid engaging handle and the opening and closing state of the lid, and selecting the standby state, the cooking process, and the keeping warm process based on the determined locked state of the lid engaging handle and the opening and closing state of the lid It consists of a control unit that performs

Description

Electric cooker {ELECTRIC COOKER}

The present invention relates to an electric cooker, and in particular, a cooking process by accurately determining whether the lid coupling handle is locked and whether the lid is opened or closed using a lock detection unit for detecting the locking of the lid coupling handle and an opening/closing sensor for detecting the opening and closing of the lid It relates to an electric cooker that does this.

An electric cooker is a device that cooks food by heating the inner pot in a state in which food materials to be cooked are contained in the inner pot to create a high-temperature and high-pressure state. Such an electric cooker is often referred to as an electric rice cooker, but in recent years, it has been used for multiple purposes to suit the name of the electric cooker so as to cook various types of food other than rice.

The basic structure of a general electric cooker consists of a main body, an inner pot accommodated in the main body, and a lid covering the upper part of the main body. The main body is provided with a heating means to heat the inner pot, and the lid is provided to open and close the upper part of the main body. In addition, the electric cooker is provided with a lock detection unit for detecting the locked and open state of the lid coupling handle formed on the lid, and determines whether the lid is closed or opened from the state detected by the lock detection unit.

The conventional electric cooker does not directly check the closed and open state of the lid, but merely predicts the closed and open state of the lid from the locked and open state of the lid coupling handle. Accordingly, when only the lid coupling handle is in the locked state while the lid is open, the electric cooker may recognize the lid as a closed state and perform a cooking process (cooking, reheating, warming process, etc.). In this case, the user or the electric cooker does not detect the open state of the lid, and there is a risk of a user safety accident due to deterioration of the quality of the contents in the inner pot, boiling over, or overheating of the product.

In addition, the conventional electric cooker applies a separate warming algorithm to quickly stabilize a sudden change in internal temperature when the lid is opened and closed during the warming process, but there are frequent cases where only the lid handle is opened while the lid is closed. Therefore, although the lid was actually closed, it was judged to be open and the wrong warming algorithm was applied, causing dryness or discoloration of the contents.

In addition, the conventional electric cooker applies the same algorithm regardless of the amount of content during the warming process, so when a small amount of content is kept warm due to a decrease in the content due to the user's eating, there is a case that a quality deterioration problem occurs due to an imbalance in the amount of heating have.

An object of the present invention is to provide an electric cooker that detects whether a lid coupling handle is locked and whether the lid is opened or closed during the cooking process, and determines whether the cooking process is in progress and the degree of heating (heating ratio) of a plurality of heating elements. .

Another object of the present invention is to provide an electric cooker that predicts the amount (remaining amount) of the contents based on the number of times and opening time of the lid or determines the internal temperature state of the electric cooker and performs a corresponding warming algorithm. .

The electric cooker according to the present invention includes a main body, an inner pot accommodated in the main body, and a lid that rotates to cover the upper part of the main body, and the electric cooker includes an input unit for obtaining a user input, and upper, side, and lower sides of the inner pot A heating unit composed of upper, side, and lower heating units for heating, respectively, a lock detection unit for detecting a locked and open state of a lid coupling handle formed on the lid, and a closed state and an open state of the lid formed on the body or the lid An opening/closing sensor detecting and a control unit that determines a locked state and an open/closed state of the lid, and selectively performs the standby state, the cooking process, and the keeping warm process based on the determined locked state of the lid coupling handle and the open/closed state of the lid .

In addition, it is preferable that the control unit stores the information on the opening/closing state of the lid for performing the cooking process according to each menu.

In addition, the control unit reads the open/closed state information of the lid according to the menu, which is the user input from the input unit, compares the read open/closed state and the determined open/closed state of the lid, and displays the information on the menu according to the comparison result. It is preferable to perform a cooking process for

In addition, when performing the warming process, it is preferable that the control unit adjusts the heating ratio of the upper, side and lower heating units based on the opening and closing times of the lid or the number of times the lid is opened.

In addition, it is preferable that the control unit performs the warming process according to the first warming algorithm by starting the warming process.

In addition, it is preferable that the control unit calculates the number of times the lid is opened based on the determined state of opening and closing of the lid, and when the number of times of opening of the lid is equal to or greater than the reference number of openings, it is preferable to perform the warming process according to the second warming algorithm.

In addition, the control unit calculates the opening time of the lid based on the determined opening and closing state of the lid, and when the opening time of the lid exceeds the first reference opening time and remains open for less than the second reference time, the third thermal insulation It is desirable to perform the algorithm.

In addition, the control unit includes a temperature sensing unit for detecting the internal temperature of the inner pot, and during the warming process according to the third warming algorithm, when the temperature detected by the temperature sensing unit is equal to or higher than the reference temperature, the first or the first 2 It is desirable to perform a warming algorithm.

In addition, it is preferable that the control unit calculates the closing time of the lid based on the determined opening and closing state of the lid, and when the closing time is equal to or greater than the reference closing time, performs the first or second warming algorithm.

In addition, the control unit calculates the opening time of the lid based on the open/closed state of the lid determined during the execution of the warming process, and when the opening time of the lid is equal to or longer than the second reference time, cancels the warming process and waits It is desirable to maintain the state.

The present invention detects whether the lid coupling handle is locked and whether the lid is opened or closed during the cooking process, determines whether the cooking process proceeds, informs the user of the determined progress, and the degree of heating (heating ratio) of a plurality of heating elements It is effective in preventing the deterioration of quality such as undercooking of contents and safety accidents of users due to overheating or overheating of contents by determining and performing the cooking process according to the menu settings.

In addition, the present invention predicts the amount of contents based on the number of times and opening time of the lid or determines the temperature state of the electric cooker and maintains the standby state after canceling the warming algorithm or the warming process corresponding thereto, so that the quality of the contents This has the effect of preventing the deterioration.

In addition, the present invention automatically cancels the warming process when the lid is kept open for a long time to prevent quality degradation and unnecessary energy waste, and when the warming process is maintained with the lid open for a long time, the temperature of the bottom of the lid or the inner pot is high However, since there is a risk of burns when users, especially children, touch the bottom of the open lid or the inner pot, there is an effect of canceling the warming process to prevent safety accidents.

1 is a block diagram of an electric cooker according to the present invention.
FIG. 2 is a first control flowchart of the electric cooker of FIG. 1 .
FIG. 3 is a second control flowchart of the electric cooker of FIG. 1 .

Hereinafter, the present invention will be described in detail through examples and drawings.

1 is a block diagram of an electric cooker according to the present invention. The electric cooker has a mechanical structure consisting of a main body, an inner pot accommodated in the main body, and a lid that rotates while covering the upper part of the main body, and an input unit 11 that receives input from the user for menu selection, cooking process, selection of execution of a plurality of warming algorithms, etc. , the display unit 13 for displaying the menu or the current state of the electric cooker (cooking process in progress, standby state, etc.), the open state of the lid, the stop of the cooking process, a warning to the user, etc., and the upper, side, and lower sides of the inner pot A heating unit 15 for applying heat from the back, a temperature sensing unit 17 for continuously sensing the internal temperature of the inner pot, and a locking sensing unit 19 for detecting the locked and open state of the lid coupling handle formed on the lid, The opening/closing detection unit 21 that detects the closed state and the open state of the lid, controls the above-described components to perform a standby state, a cooking process, a warming process, etc., and a lock detection unit 19 and an opening/closing detection unit ( 21) is used to accurately determine whether the lid is opened or closed, and is composed of a circuit unit including a control unit 30 that performs a cooking process. In the present embodiment, since it corresponds to the description of the input unit 11, the display unit 13, and the temperature sensing unit 17, a description thereof will be omitted.

First, the heating unit 15 is composed of an upper heating unit formed on the lid, a side heating unit formed in the body to heat the side surface of the inner pot, and a lower heating unit formed in the body to heat the bottom surface of the inner pot, and the control unit The degree of heating (heating ratio) between the upper and lower heating units is determined by the control of (30).

In addition, the lock detection unit 19 detects the locked state and the open state of the lid engaging handle (or the lid locking device operated by the lid engaging handle), for example, is implemented in the form of a micro switch.

In addition, the opening/closing detection unit 21 is made of a tilt sensor formed on the lid that rotates by a certain angle, and when the detected angle is a reference angle (for example, 30°) or more, it detects that the lid is open. An opening detection signal is transmitted to the control unit 30 , and when the detected angle is less than the reference angle, the lid is sensed as closed and a closing detection signal is transmitted to the control unit 30 . In another embodiment, the opening/closing detection unit 21 is mounted on the body and the lid, respectively, and is implemented in the form of a magnet and a reed switch that are adjacent to each other in the closed state of the lid and are spaced apart in the open state of the lid, and the closed state and the open state of the lid According to the operation of the reed switch (contact closing and contact opening) is made. The control unit 30 detects a change in current or voltage (current conduction and current cutoff) according to the operation (contact closing and contact opening) of the opening/closing detection unit 21 to determine the closed state and the open state of the lid. In addition to the above two embodiments, the opening/closing detection unit 21 may be implemented with various detection sensors.

In addition, the control unit 30 controls the above-described components to maintain the standby state, and performs the cooking process according to the menu selection and the cooking start command, and performs the warming process after the cooking process, or a newly input The keep warm process is performed according to the keep warm command. The control unit 30 determines whether the cooking process is progressing and the degree of heating of the heating unit 15 based on the lock and open detection signals from the lock detection unit 19 and the open and close detection signals from the open/close detection unit 21 . The procedure for determining (heating rate) is described below.

FIG. 2 is a first control flowchart of the electric cooker of FIG. 1 . The control unit 30 starts a cooking process according to a menu set by the user or a cooking process according to a preset menu through the input unit 11 .

In step S11, the control unit 30 receives the detection signal from the lock detection unit 19 to confirm the locking state of the lid coupling handle.

In step S13, the control unit 30 proceeds to step S15 if the lid engaging handle is in the locked state, otherwise proceeds to step S19. That is, if the detection signal from the lock detection unit 19 is a lock detection signal, the process proceeds to step S15 , and if the detection signal from the lock detection unit 19 is an open detection signal, the process proceeds to step S19 .

In step S15 , the control unit 30 receives a detection signal from the opening/closing detection unit 21 and confirms the opening/closing state of the lid.

In step S17, the control unit 30 stores the information on the opening/closing state of the lid for performing the cooking process according to each menu. Information on the open/closed state of the lid includes information that cooking should be performed with the lid closed for menus such as cooked rice or steamed dishes, and information that should be cooked with the lid open for menus such as stir-fried dishes or porridge dishes includes The control unit 30 reads the open/closed state information of the lid, and compares the checked current open/close state with the open/close state set according to the menu. If the set open/close state matches the current open/close state, the process proceeds to step S21, otherwise proceeds to step S19.

In step S19, the control unit 30 stops or cancels the cooking process according to the set menu, and displays a warning indicating that the locking state of the lid coupling handle or the opening and closing state of the lid is incorrect to the user for cooking the current menu. (13) is indicated. In addition, the control unit 30 guides the user to the correct locking method of the lid coupling handle or the correct opening and closing method of the lid through the display unit 13, thereby preventing the wrong use of the electric cooker.

2, the control unit 30 detects whether the lid coupling handle is locked and whether the lid is opened or closed during the cooking process, determines whether to proceed with the cooking process, and performs a correct cooking process corresponding to the menu, The user is informed of the determined progress and guided to use the electric cooker correctly according to the menu.

In step S21, the control unit 30 proceeds with the cooking process according to the set menu.

FIG. 3 is a second control flowchart of the electric cooker of FIG. 1 . After performing the cooking process of FIG. 2 , the control unit 30 performs the keep-warm process or performs the keep-warm process according to a newly input keep-warm command.

In step S31 , the controller 30 controls the heating unit 15 to perform a warming process according to the pre-stored first warming algorithm. The first warming algorithm is to maintain the heating ratio of the upper heating part: the side heating part: the lower heating part=3:5:2 in the warming process.

In step S33, the control unit 30 receives the detection signal from the lock detection unit 19 to confirm the locking state of the lid coupling handle.

In step S35, the control unit 30 determines whether the lid coupling handle is in a locked state, and if it is in a locked state, proceeds to step S39, otherwise proceeds to step S37.

In step S37, the control unit 30 calculates and stores the opening time (H) at which the lid coupling handle is maintained in an open state. When the opening time H reaches a predetermined time (eg, 5 minutes, 10 minutes, 15 minutes, etc.), the control unit 30 periodically informs the user that the lid coupling handle is open through the display unit 13 . By notifying, the user's attention is called so that the user operates the lid engaging handle to change to the locked state.

In step S39, the control unit 30 initializes the opening time (H) of the pre-stored lid coupling handle. However, when there is no previously stored open time H, the control unit 30 may omit the execution of step S39.

In step S41, the control unit 30 receives the detection signal from the open/close detection unit 21 to check the open/closed state of the lid, and store the checked open/closed state of the lid.

In step S43, the control unit 30 checks whether the stored open/closed state of the lid is changed from the closed state to the open state. If it is changed from the closed state to the open state, the process proceeds to step S45; otherwise, the process proceeds to step S47.

In step S45, the control unit 30 calculates and stores the number of times (C) of opening the lid. The control unit 30 initializes the previously stored number of lid openings C when starting the second control flowchart of FIG. 3 , that is, when starting the warming process.

In step S47, the control unit 30 checks whether the lid is closed, if the lid is closed, proceeds to step S49, otherwise proceeds to step S57.

In step S49, the control unit 30 initializes the lid open time (T1) and calculates and stores the closing time (T2). However, when there is no previously stored open time T1, the controller 30 omits initialization of the open time T1.

In step S51, the control unit 30 checks whether the third warming algorithm is currently being performed. If the third warming algorithm is being performed, the process proceeds to step S53; otherwise, the process proceeds to step S55.

In step S53 , the control unit 30 determines whether the lid closing time T2 or the temperature detected by the temperature sensing unit 17 corresponds to a release condition of the third warming algorithm currently being performed. This release condition is a condition for terminating the third warming algorithm performed after the lid is opened for a long period of time, and performing the first or second warming algorithm, and corresponds to a criterion for determining whether the internal temperature of the inner pot is stabilized. . The control unit 30 uses the lid closing time T2 or the temperature detected by the temperature sensing unit 17 as a release condition of the third warming algorithm. If the lid closing time T2 is equal to or greater than the standard closing time (eg, 8 minutes) or the temperature detected by the temperature sensing unit 17 is equal to or greater than the reference temperature (eg, 75° C.), the control unit 30 is It is determined that the release condition is satisfied, and the process proceeds to step S55. Otherwise, the process proceeds to step S67 to continue performing the currently executed third warming algorithm.

In step S55, the control unit 30 determines whether the stored number of lid openings (C) is equal to or greater than the reference number of openings (eg, 4 times), and if the number of lid openings (C) is equal to or greater than the reference number of openings, step (S65); otherwise, the process proceeds to step S63. The reference number of times of opening corresponds to a criterion for determining the amount (remaining amount) of the contents inside the inner pot. Determining that, the process proceeds to step S65 to perform a warming process for a small amount of content, and when the user opens the lid less than the standard number of openings, the control unit 30 determines that the remaining content exceeds a small amount, Proceeds to step S63 to perform a warming process for the content in excess of a small amount.

In step S57, the control unit 30 calculates the lid open time (T1) and initializes and stores the closing time (T2). However, when there is no previously stored closing time T2, the controller 30 omits initialization of the closing time T2. When the opening time T1 of the lid reaches a predetermined time (eg, 5 minutes, 10 minutes, 15 minutes, 20 minutes, etc.), the control unit 30 informs the user that the lid is open through the display unit 13 . It informs the user periodically to draw the user's attention and induces the user to close the lid to prevent deterioration of the quality of the contents due to inflow of external air.

In step S59 , the control unit 30 determines whether the lid opening time T1 is equal to or less than the first reference opening time (eg, 2 minutes). If the lid opening time T1 is equal to or less than the first reference opening time, the process proceeds to step S51, otherwise proceeds to step S61. When the lid is opened and closed for a short time, such as less than the first reference opening time, the control unit 30 proceeds to step S51 because the temperature change of the inner pot is not large, and steps (S51), (S53) and (S55) The first to third warming algorithms are selectively performed according to the determination.

In step S61 , the control unit 30 determines whether the lid opening time T1 is equal to or greater than the second reference opening time. If the lid opening time T1 is equal to or longer than the second reference opening time, the process proceeds to step S69, otherwise, the process proceeds to step S67.

In step S63 , the controller 30 performs a warming process according to the first warming algorithm. The first warming algorithm corresponds to a general warming algorithm performed when the content is greater than a small amount.

In step S65, the control unit 30 performs a warming process according to the second warming algorithm. The second warming algorithm is to keep a small amount of content, and the heating ratio in the warming process is maintained at an upper heating part: a side heating part: a lower heating part = 4:3:3. When there is a small amount of content inside the inner pot, the content is located below the position of the side heating part, less heat from the side heating part is transferred to the content, and the temperature of the content is lowered, so that the temperature of the space above the content is also lowered, As the temperature difference between the upper space and the bottom of the lid becomes large, water condensation increases on the bottom of the lid, and water condensation on the bottom of the inner pot where there is no content increases, which intensifies the spread of the contents and the occurrence of whitening. To solve this problem, the control unit 30 lowers the heating degree of the side heating unit instead of the first or third algorithm so that the side heating unit and the lower heating unit have the same heating rate, and the upper heating unit has the largest heating rate. 2 By performing the warming algorithm, it is possible to reduce the water condensation phenomenon and prevent deterioration of the quality of the contents.

In step S67, the control unit 30 performs a warming process according to the third warming algorithm. The third warming algorithm is to keep the lid open for more than the first reference opening time and less than the second reference time, and the heating ratio in the warming process is: upper heating part: side heating part: lower heating part = 4: Keep it 4:2. If the lid is opened for a long time, the temperature of the bottom surface of the lid or the side of the inner pot will drop sharply, and it takes a lot of time to stabilize the inner temperature of the inner pot by raising it to the target temperature for keeping warm, and the contents dry out due to prolonged heating. . In order to prevent this drying out, the control unit 30 performs a third algorithm such that the heating ratio of the upper heating part and the side heating part is higher than that of the lower heating part and the temperature of the lower surface of the lid and the side of the inner pot is lowered. It can prevent deterioration of the quality of the contents by shortening the temperature stabilization time.

In step S69, when the lid is opened for more than the second reference opening time, the control unit 30 stops the heating to prevent rapid drying or discoloration of the contents to cancel the warming process and maintain the standby state, and the display unit ( 13) informs the user of the fact that the lid is open for a long time and the cancellation of the warming process. When the lid is left open for more than the second reference opening time, the temperature of the contents is lowered due to the inflow of external air, so that the conventional electric cooker further increases the amount of heating of the contents to maintain the preset keeping temperature to keep the moisture in the contents. As more evaporation occurs, a problem of rapid drying of the contents or a problem of discoloration of the contents due to the inflow of external air for a long time occurs. prevent problems In addition, when the warming process is maintained in the open state of the lid for a long time, the conventional electric cooker increases the amount of heating to maintain the preset warming temperature, so that the temperature of the bottom surface of the lid or the inner pot increases significantly, which makes the user especially children open the lid. Since there is a risk of getting burned when touching the bottom or inner pot, the control unit 30 cancels the warming process to prevent safety accidents.

In step S71 , the control unit 200 determines whether the user has inputted the end of the warming process through the input unit 11 . If the end of the warming process is inputted, the warming process is terminated, otherwise the process proceeds to step S31.

Through the second control flowchart of FIG. 3 , the control unit 30 detects whether the lid coupling handle is locked and whether the lid is opened or closed during the cooking process, and determines the heating ratio of the upper, side and lower heating units according to the menu setting. By performing the cooking process (selection of the first to third warming algorithms), there is an effect that can prevent deterioration of quality such as undercooking of contents and safety accidents of users due to boiling or overheating of contents.

In addition, through the second flowchart of FIG. 3 , the control unit 30 predicts the amount of contents or determines the temperature state of the electric cooker based on the number of times the lid is opened and the opening time of the lid, and first to third warming algorithms corresponding thereto There is an effect of preventing the deterioration of the quality of the contents by selectively performing one of the algorithms or maintaining the standby state after cancellation of the warming process.

In addition, the present invention determines whether the user will perform only the first warming algorithm (to perform the conventional warming process) or a plurality of warming algorithms (first to third warming algorithms) according to the second control flowchart of FIG. You can choose to do it selectively. For this selection, the input unit 11 obtains, from the user, a selection input as to whether to perform only the first warming algorithm or a plurality of warming algorithms (first to third warming algorithms), and the control unit 30 obtains According to the selected input, a warming process according to the second control flowchart is performed, or a warming process in which only the first warming algorithm is performed is performed.

As described above, the present invention is not limited to the specific preferred embodiments described above, and anyone with ordinary skill in the art to which the invention pertains can use various methods without departing from the gist of the present invention as claimed in the claims. It goes without saying that modifications are possible, and such modifications are intended to be within the scope of the claims.

11: input unit 13: display unit
15: heating unit 17: temperature sensing unit
19: lock detection unit 21: open/close detection unit
30: control unit

Claims (14)

An electric cooker comprising a main body, an inner pot accommodated in the main body, and a lid rotating to cover an upper portion of the main body, wherein the electric cooker includes:
an input unit for obtaining a user input;
a heating unit comprising upper side, side side and lower side heating units for heating the upper side, side side, and lower side of the inner pot, respectively;
a lock detection unit for detecting the locked and open state of the lid coupling handle formed on the lid;
an opening/closing sensing unit formed on the main body or the lid to detect a closed state and an open state of the lid;
A standby state, a cooking process, and a warming process are performed according to the user input from the input unit, and the locked state of the lid coupling handle and the open/closed state of the lid based on the detection signals from the lock detection unit and the open/close detection unit and a control unit for selectively performing the standby state, the cooking process, and the keeping warm process based on the determined locked state of the lid coupling handle and the opened and closed state of the lid,
The control unit stores the opening and closing state information of the lid set according to each menu,
The information on the open/closed state of the lid includes information to be cooked in a state in which the lid is closed and information to be cooked in a state in which the lid is opened. delete According to claim 1,
The control unit reads the open/closed state information of the lid, compares the read open/closed state and the determined open/closed state of the lid, and performs the cooking process for the menu according to the comparison result. . 4. The method of claim 3,
The electric cooker according to claim 1, wherein the control unit performs the cooking process for the menu when the read open/closed state of the lid matches the determined open/closed state of the lid. The method of claim 1,
The control unit calculates the opening and closing times and the number of times of opening of the lid based on the detection signal from the opening/closing detection unit while starting the warming process and performing the warming process according to the first warming algorithm, Adjust the heating ratio of the upper, side and lower heating parts according to the first warming algorithm based on the opening and closing times and the number of times the lid is opened, the heating ratio of the side heating part and the lower heating part being the same, and the heating ratio of the upper side heating part is the same. The heating ratio of the heating part is adjusted to be greater than the heating ratio of each of the side heating part and the lower heating part, or the heating ratio of each of the upper heating part and the side heating part is greater than the heating ratio of the lower heating part and the upper heating part and the side heating part Electric cooker, characterized in that the heating rate is adjusted to be the same. delete 6. The method of claim 5,
When the number of times of opening of the lid is equal to or greater than the reference number of openings, the control unit has the same heating ratio of the side heating part and the lower heating part, and the heating ratio of the upper heating part is greater than the heating ratio of each of the side heating part and the lower heating part. 2 Electric cooker, characterized in that it performs a warming process according to the warming algorithm. 8. The method of claim 5 or 7,
When the opening time of the lid exceeds the first reference opening time and the lid is opened for less than the second reference time, the heating ratio of each of the upper heating part and the side heating part is greater than the heating ratio of the lower heating part, and An electric cooker, characterized in that the third heating algorithm is performed so that the heating ratio of the upper heating unit and the side heating unit is the same. 9. The method of claim 8,
The control unit includes a temperature sensing unit for sensing the internal temperature of the inner pot, and during the warming process according to the third warming algorithm, when the temperature detected by the temperature sensing unit is equal to or higher than a reference temperature, the first or second warming An electric cooker, characterized in that it performs an algorithm. 9. The method of claim 8,
The electric cooker according to claim 1, wherein the control unit executes the first or second keeping warm algorithm when the closing time is equal to or greater than a reference closing time while performing the warming process according to the third warming algorithm. delete 8. The method of claim 7,
The control unit is an electric cooker, characterized in that for controlling the heating unit in a heating ratio of the upper heating unit: the side heating unit: the lower heating unit = 4:3:3 according to the second warming algorithm. 9. The method of claim 8,
The control unit is an electric cooker, characterized in that for controlling the heating unit in a heating ratio of upper heating unit: side heating unit: lower heating unit = 4:4:2 according to the third warming algorithm. 6. The method of claim 5,
The control unit cancels the warming process and maintains the standby state when the opening time of the lid is equal to or longer than a second reference time while the warming process is being performed.

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