KR20030033393A - Steam control method for induction heating cooker - Google Patents

Abstract

PURPOSE: A steam vapor discharge control method for an induction heater cooker is provided to reduce noises cause due to the discharge of steam vapor by periodically controlling the steam vapor discharge operation. CONSTITUTION: A steam vapor discharge control method comprises the first step(100,110) of starting a cooking operation and judging whether the cooking operation is sequentially performed; the second step(120) of opening a solenoid valve by driving a solenoid valve driving unit; the third step(130) of judging whether a predetermined time has lapsed; the fourth step(140) of shutting off the solenoid valve if it is judged in the third step that a predetermined time has lapsed; the fifth step(150) of judging whether a predetermined time has lapsed; the sixth step(160) of repeatedly opening and shutting the solenoid valve until the pressure of an oven is lowered to a predetermined level; and the seventh step(170) of discharging steam vapor and ending the cooking process.

Description

Steam control method for induction heating cooker

The present invention relates to a steam discharge control method of an induction heating cooker, and more particularly, to a steam discharge control method of an induction heating cooker which can control the steam discharge cycle to lower the steam discharge noise.

Induction heating cooker performs the cooking function by the way in which the eddy current flows when the magnetic force generated from the working coil passes through the pot. Looking at the basic heating principle of the induction heating cooker, when a current is applied to the working coil, the magnetic oven is heated by induction heating (induction), it is made in the oven inside.

In addition, the induction heating cooker is made to be cooked by maintaining a high pressure in the oven in order to match the national characteristics of the country that prefers the waxy rice. Induction heating cooker for cooking according to this principle, has gained a lot of response because of fast cooking time, various flavors, and high power efficiency.

Dishes that can be performed in the induction heating cookers are very diverse, the most commonly performed dish is a cooking process to cook rice. The cooking process is followed by a soaking process called primaryly washed rice, a primary heating process, a secondary heating process, a boiling process, a steaming process, and a steam discharging process, which primarily heat the soaked rice. When the process is completed, the rice is completed while proceeding to the warming process.

Induction heating cooker is maintained at a very high pressure inside the oven during the cooking process as described above. In particular, the pressure inside the oven is maintained at 1.8 atm in the boiling process heated to the highest temperature at the highest output, and lowered to 1.6 atm in the moxibustion process. After the moxibustion process is completed, steam is discharged to the outside in order to lower the pressure inside the oven to 1.0 atm in the subsequent steam discharge process.

In this way, the induction heating cooker maintains a very high pressure in the oven to perform a quick cooking, and the pressure inside the oven is controlled through the steam discharge process as the moxibustion process is completed.

By the way, the conventional induction heating cooker controls the vent hole connecting the oven and the outside to the open state immediately in order to lower the pressure inside the oven to 1.0 atm immediately after the completion of the moxibustion process. Therefore, there is a problem that high noise of 65dB or more occurs in the steam discharge process for controlling the high pressure difference between the inside and outside of the oven at the completion of the cooking process of the conventional induction heating cooker. The noise generated at this time surprised the people around because it generated a very high sound instantaneously.

In addition, the conventional induction heating cooker is to maintain the open state until the ventilation hole once opened until the pressure in the oven drops below a certain value. Therefore, since the high temperature steam which started discharge | emitted once is discharged continuously for more than a predetermined time, it might pose a safety risk of an elderly person, a child, etc.

Accordingly, an object of the present invention is to provide a method for controlling the steam discharge of an induction heating cooker which controls the cycle of the discharged steam, thereby lowering noise and increasing customer satisfaction.

1 is a control block diagram for steam discharge of the induction heating cooker according to the present invention,

Figure 2 is a flow chart for the operation of steam induction cooker according to the present invention.

Explanation of symbols on the main parts of the drawings

10: signal input unit 20: temperature detection unit

30 control unit 40 solenoid valve drive unit

50: display unit 60: heating source drive unit

70: timer

Steam discharge control method of the induction heating cooker according to the present invention for achieving the above object, in the induction heating cooker having a solenoid valve for opening and closing the vent for steam discharge in and outside the oven, the solenoid at the time of steam discharge A setting step of setting an opening operation time and a closing operation time of the valve; An opening control step of controlling the solenoid valve in an open state during the set opening operation time in a steam discharge process; And a closing control step of controlling the solenoid valve to the closed state during the closing operation time when the opening operation time has elapsed, wherein the opening control step and the closing control step are performed when the pressure in the oven is lowered to a predetermined value or less. It is characterized by repeatedly made up to.

All the above steps of the present invention is characterized in that it is made during the cooking step of cooking rice.

The opening operation time of the present invention is characterized in that it is set smaller than the closing operation time.

Hereinafter, a method for controlling steam emission of an induction heating cooker according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a control block diagram for controlling the steam discharge of the induction heating cooker according to the present invention.

The induction heating cooker of the present invention is installed on the outer surface of the cooker, the signal input unit 10 for inputting a cooking menu signal by the user, and recognizes the cooking menu selected by the signal input unit 10, the preset cooking method In accordance with the control unit 30 to control the progress of the cooking. In the present invention, the control unit 30 controls the steam discharge cycle during the steam discharge step in the cooking step of cooking rice.

In addition, the induction heating cooker of the present invention, when the lid of the cooker is closed, by connecting the inside and the outside of the oven, a vent for discharging the steam in the oven to the outside during the steam discharge process is formed. The vent hole is opened and closed by a solenoid valve, and the solenoid valve is driven by the solenoid valve driver 40 under the control of the controller 30.

And the induction heating cooker of the present invention, such as the signal input unit 10 is installed on the outer surface of the cooker, and includes a display unit 50 for displaying the current cooking progress, etc., the time check operation required during cooking operation The timer 70 is provided for this purpose. In addition, the induction heating cooker of the present invention includes a heating source drive unit 60 for driving the working coil under the control of the control unit 30 to generate heat required in the cooking process, and the temperature in the oven during the cooking operation. And a temperature detector 20 for detecting the back and the like.

The induction heating cooker of this invention which consists of such a structure is operated as follows.

When the user puts rice and water for cooking in the oven, closes the lid of the cooking, and tightens the pressure, the preparation for cooking is completed. Then, the user selects a cooking menu through the signal input unit 10, and the selected cooking menu is recognized by the controller 30.

Next, the control unit 30 reads the cooking process algorithm preset according to the selected cooking menu from its own memory, and controls the cooking process to proceed according to the read cooking algorithm.

At this time, the cooking process is performed, followed by a soaking process, called firstly washed rice, a first heating process, a second heating process, a boiling process, a steaming process, and a steam discharge process to heat the soaked rice first, When the steam discharge process is completed, the rice is completed while proceeding to the warming process.

And while the operating time, operating temperature, and the like of each process is controlled by the control unit 30, the heating source drive unit 60 drives the working coil to generate heat required for the cooking process. In addition, the display unit 50 displays a state of cooking that is currently in progress, and the temperature detector 20 detects the temperature in the oven to be used as a basic signal for controlling the cooking process of the controller 30.

On the other hand, when the moxibustion process is completed while the operation is in progress, the controller 30 proceeds to the control operation for steam discharge of the present invention.

2 is an operation flowchart for steam discharge of the induction heating cooker according to the present invention.

First, the control unit 30 checks whether the cooking process proceeds sequentially (step 100) prior to the steam discharge process, and determines whether the moxibustion process is finished as the last process of the 100th step (step 110). ).

The control unit 30 drives the solenoid valve driving unit 40 to open the solenoid valve for the steam discharge process (step 120). The vent of connecting the inside and the outside of the oven is opened by the control of the 120th step, and the steam inside the oven is discharged to the outside.

The opening time of the solenoid valve according to the 120 th step is performed only for a predetermined time (about 10 ms) (step 130).

When the predetermined time set in step 130 has elapsed, the solenoid valve driving unit 40 is controlled to control the solenoid valve to be closed (step 140). The vent of connecting the inside and the outside of the oven is blocked by the control of the 140th step, and the steam discharge is stopped.

The closing operation of the solenoid valve in step 140 is performed for a predetermined time (about 990 ms) (step 150).

As such, when the solenoid valve is opened for a predetermined time and closed for a predetermined time, the steam discharged to the outside through the vent momentarily during the opening time of the solenoid valve is gradually discharged by the closing force for a predetermined time. It will shrink and close completely after 300 ms.

This operation is repeatedly performed until the pressure inside the oven falls below a predetermined value (step 160), and when the steam inside the oven falls below a predetermined value, the cooking process is terminated, and the process proceeds to the warming step (step 170). ).

That is, in the present invention, in order to reduce the noise caused by steam discharge, the solenoid valve on / off operation is repeatedly performed in the process of discharging steam. When the operation is performed, the noise is lowered while steam is gradually discharged by the closing force of the solenoid valve.

Therefore, the present invention, it is basic to control the solenoid valve on / off under the control of the control unit 30 in order to lower the steam discharge noise of about 65dB or more generated when the solenoid valve is momentarily opened in the steam discharge process to about 56dB or less. It is technical idea.

And in the present invention has been described as an example cooking cooking process, but need not be limited to this, of course, it is applicable to the entire process of performing steam discharge in the cooking operation using an induction heating cooker.

As described above, the present invention reduces the noise by periodically controlling the steam discharge operation in order to reduce the noise generated during the steam discharge in the steam discharge operation of the induction heating cooker, thereby achieving an effect that can increase the customer satisfaction. Will be.

Claims (3)

In an induction heating cooker having a solenoid valve for opening and closing the vent for steam discharge inside and outside the oven, A setting step of setting an opening operation time and a closing operation time of the solenoid valve at the time of steam discharge; An opening control step of controlling the solenoid valve in an open state during the set opening operation time in a steam discharge process; And a closing control step of controlling the solenoid valve in the closed state during the closing operation time when the opening operation time has elapsed. The opening control step and the closing control step, the steam discharge control method of the induction heating cooker characterized in that it is made repeatedly until the pressure in the oven is lowered below a predetermined value. The method of claim 1, All the steps of claim 1, wherein the steam discharge control method of the induction cooker, characterized in that the cooking step is made during cooking. The method of claim 2, And the opening operation time is set smaller than the closing operation time.