KR100315087B1 - Apparatus for compensating for cooking time if door is opened while cooking is in progress in gas oven - Google Patents

Abstract

PURPOSE: A cooking time compensating apparatus is provided to prevent foods from being half-cooked by compensating for a cooking time when a door is opened while cooking is in process in a gas oven. CONSTITUTION: A cooking time compensating apparatus includes a door detecting section for detecting an opening and closing state of a door by receiving an output signal of a door switch installed in a microcomputer(11). A compensating time calculating section(112) is provided to calculate a time required to raise the temperature in a gas oven by receiving output signals from the door detecting section(111) and a temperature detecting section(12). A cooking time compensating section(113) compensates for the cooking time by receiving a signal from the compensating time calculating section(112). A compensating time output section is provided to display a compensated cooking time in a display section(19).

Description

Cooking time correction device when opening door during cooking of gas oven

The present invention relates to a device for correcting the cooking time when the door is opened while cooking through a gas oven, in particular, if the internal temperature is sharply lowered due to the opening of the door during cooking, the temperature is raised above a predetermined temperature again. The present invention relates to a cooking time correcting device at the time of opening a door during cooking, which prolongs the cooking time by a time taken to prevent cooking from being cooked.

In general, a gas oven using a convection fan forms an oven chamber 1 having a predetermined space area in a main body 100 having a rectangular box shape as shown in FIG. Install a turntable (3) rotated by a motor at the bottom of the oven chamber (1), and heat the burner (4) from the bottom of the bottom of the oven chamber (1) to the rear portion. An induction hot air furnace (5) is formed, and the lower side of the hot air furnace (5) is provided with an electric valve (6), a sparker (7), an ignition detection frame rod (8) and a burner (4) for controlling the supply of gas. ), A convection fan 9 for blowing heat into the oven chamber is installed at the outside of the rear surface of the oven chamber 1 in which several exhaust holes 1a are perforated. An exhaust port 1b having a thermistor Th for detection is provided, and the opening and closing of the door 2 is provided in front of the opening portion of the main body 100. Installing the door switch (SW1) for detecting a state, each of the machine had been configured so that selective driving is controlled by the microcomputer 11 which is connected to the display unit and key input unit 10. FIG.

Therefore, when the user sets the cooking temperature and cooking time for a predetermined food through the key input unit 10 and operates the cooking start switch, the internal temperature of the oven chamber 1 is detected through the thermistor Th. The microcomputer 11 is inputted to the microcomputer 11, and the input microcomputer is compared with the pre-stored temperature conditions. As a result, when the ignition condition (set temperature-ΔT) is achieved, the convection fan 9 is driven in advance for a predetermined time. The waste gas, which may remain in the combustion chamber, is discharged to the outside, and then the two electromagnetic valves 6 and the sparker 7 are operated to burn the burner 4.

When the ignition is detected through the frame rod 8, the microcomputer 11 shuts off the sparker 7 and drives the convection fan 9 until the internal temperature reaches the set temperature. Therefore, the heat generated from the burner 4 installed below the oven chamber 1 is forcibly blown into the oven chamber 1 by the operation of the convection fan 9, and the foods in the oven chamber are heated and cooked by the heat. At this time, the thermistor Th continuously detects the temperature in the refrigerator.

As a result, when the temperature in the refrigerator rises above the set temperature suitable for cooking a predetermined food and the extinguishing condition (set temperature + DELTA T) is established, the microcomputer 11 closes the electronic valve 6 so that the burner 4 ), The flame disappears, and such ignition and extinguishing is repeatedly performed around the set temperature within the set cooking time as shown in FIG. Of course, the same point as above, the repetition of fire extinguishing continues only as long as the door is kept closed.

However, most people who use the oven have a habit of opening the oven door three times or four times during cooking, and checking the cooking status of the food inside the oven. As a result of the inflow, the temperature in the refrigerator, which has risen above a predetermined temperature, drops sharply.

If the temperature in the refrigerator drops instantaneously every time the door is opened, it takes some time to maintain the normal temperature necessary for cooking again.

Nevertheless, in the conventional oven, regardless of whether the door is opened during cooking, the internal temperature of the high temperature is maintained within a predetermined set time within a predetermined set time, so that the cookware becomes less ripe when the door is frequently opened. .

An object of the present invention is to calculate the time it takes to raise the temperature again above a predetermined temperature when the internal temperature is drastically reduced due to the opening of the door during cooking, and automatically adds it to the cooking residual time so that the set time is extended. It is to provide a cooking time correction device at the time of opening the door during cooking that can prevent water from ripening.

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

3 is a block diagram of a control unit in a gas oven to which the present invention is applied, and includes a key input unit 10 for generating various key signals; A microcomputer 11 for receiving a predetermined signal from each unit and performing a predetermined program to perform overall control of the oven; A temperature detector 12 detecting a temperature inside the refrigerator through a thermistor Th installed in the oven chamber; A flame detection unit 18 for detecting a flame through the frame rod 8; A display unit 19 which displays various information according to the operation of the gas oven in letters and numbers; A convection fan driver 13 controlled by the microcomputer 11 to selectively drive the convection fan; A sparker driver 17 controlled by the microcomputer 11 to selectively drive the sparker; An electromagnetic valve driver 14 controlled by the microcomputer 11 to selectively open and close the electromagnetic valve; An oven lamp driving unit 15 for selectively lighting the lamp LP installed at the ceiling of the oven chamber under the control of the microcomputer 11; In the control device of the gas oven composed of a buzzer (20) to inform the user of the end of cooking, etc., the output signal of the door switch (SW1) in the microcomputer 11 recognizes the open and closed state of the door A door opening and closing recognition unit 111; A correction time calculation unit 112 for receiving the output signal of the door opening / closing recognition unit 111 and the temperature detection unit 12 detecting the temperature of the oven chamber and calculating a time required to raise the temperature in the oven chamber to the set temperature; ; A cooking time compensator 113 configured to compensate the cooking time by adding the cooking correction time output from the correction time calculating unit 112 to the remaining cooking time; And a compensation time output unit 114 for outputting the compensated cooking time output from the cooking time compensator 113 to the display unit 19.

4 is a flowchart illustrating an operation state of the apparatus of the present invention, wherein a user sets a cooking temperature and a cooking time for a predetermined food through the key input unit 10 and operates a cooking start switch. When cooking is in progress, if the door 2 is opened, the counter of cooking time is stopped until the door is closed again, the drive of the electric valve 6 and the convection fan 9 are turned off, the door is closed and the cooking start switch is When it is pressed again, it detects the internal temperature at that time and adds the time required to increase to the predetermined temperature to the remaining time, displays the compensated cooking time on the display unit 19, and simultaneously drives the convection fan and the current internal temperature is less than the set temperature. If the flame is detected by driving the electromagnetic valve 6 and the sparker 7, the drive of the sparker 7 is interrupted, and the internal temperature is continuously detected by detecting the internal temperature. It is characterized in that the process consisting of repeating the process until the end of the cooking time to extinguish and to ignite again when the temperature falls below a predetermined temperature.

When described with reference to Figure 5 the effect of the present invention as follows.

First, the user opens the door 2 of the gas oven, puts a cooking object to be cooked in the oven, touches the door again, and sets the cooking set temperature and cooking time for the cooking object through the key input unit 10. When the cooking start switch is pressed after setting, the convection fan 9 is driven for a predetermined time to discharge the waste gas which may remain in the combustion chamber, and then the two electromagnetic valves 6 are provided through the sparker driver 17 and the electromagnetic valve driver 14. ) And sparker (7) to burn burner (4).

When the ignition is detected by the flame detection unit 18 connected to the frame rod 8, the microcomputer 11 generates a predetermined output signal to the sparker driver 17 to generate the sparker 7. The drive is blocked and the convection fan 9 is driven through the convection fan drive unit 13 until the internal temperature reaches the set temperature.

Therefore, the heat generated by the burner 4 provided below the oven chamber 1 is forcedly blown into the oven chamber by the convection fan 9, and the cooked product is heated and cooked by the heat.

At this time, the temperature detector 12 connected to the thermistor (Th) continuously detects the internal temperature in the oven chamber (1). If the internal temperature rises above the cooking temperature for a predetermined cooking item, the fire extinguishing condition is increased. Once established, the microcomputer 11 closes the electronic valve 6 so that the flame disappears from the burner 4, and such ignition and fire extinguishing is set until the set cooking time ends unless the door is opened during cooking. It persists around the temperature.

In this way, when the cooker who is cooking is opened, the door 2 is opened to determine the ripening degree of the cooked material in the oven chamber 1, and the door switch SW1 is “off”. The door opening and closing recognition unit 111 recognizes this and outputs it to the correction time calculating unit 112, and at the same time, the counting of the set cooking time is stopped at that point, and the driving of the electronic valve 6 and the convection fan 9 is blocked. .

In addition, the correction time calculating unit 112 recognizes that the door is open, calculates a compensation time that may be taken to increase the temperature in the oven chamber detected by the temperature detector 12 to the set temperature to prepare a cooking time compensation unit ( 113), the cooking time compensator 113 adds the correction time to the remaining time (ie, the remaining cooking time) after subtracting the time progressed from the set time to the present time. It is increased by that, even though the cooking is less ripe, the set cooking time is completed to prevent the heating from being stopped.

At this time, the temperature in the oven chamber (1) is drastically lowered like the fifth degree while the door (2) is open, for example, if the door was opened for about 5-10 seconds during cooking, the temperature inside the oven is about the set temperature It will drop by about 30-40 ℃.

Therefore, if you want to continue cooking the oven by closing the door again and pressing the cooking start switch, the cooking time must be compensated for the heating time to raise the dropped temperature back to the set temperature because the door is opened. It will not be unripe.

That is, in the present invention, whenever the cooking start switch is pressed again after the door 2 is opened and closed during cooking, the internal temperature at that time and the opening time of the door are detected to calculate the heating time required to rise to the set temperature again. By adding it to the remaining cooking time (for example, an increase of about 30 seconds each time the door is opened), it is possible to prevent the cooking from being frequently cooked due to the door being opened frequently.

In addition, since the compensated cooking time output from the cooking time compensator 113 is displayed on the display unit 19 by the compensating time output unit 114, the cooker can easily recognize the completion time of cooking of the cooking being cooked. Can be.

On the other hand, when the open door 2 is closed again as described above and the cooking start switch is operated, the microcomputer 11 drives the convection fan 9 to blow residual heat into the oven, and at the same time, the temperature detection unit 12 By detecting the internal temperature again through the high temperature is less than the set temperature to drive the electronic valve (6) and sparker (7) for ignition.

In this way, even if the electronic valve (6) and the sparker (7) is driven, if the flame detection unit 18 does not detect the flame indicates that the incombustible state through the buzzer 20, if the spark is detected sparker (7) The ignition and extinguishing are repeated around the set temperature until the remaining cooking time ends, as in the existing gas oven.

As described above, according to the present invention, if the internal temperature drops rapidly due to the opening of the door during cooking, the cooking time is extended by calculating the time taken to raise the temperature again above the predetermined set temperature so that the remaining cooking time is extended. Even if the is frequently opened, it is possible to prevent the preparations from being unripe in advance, thereby improving the reliability of the product.

1 is a schematic side cross-sectional view of a typical gas oven.

2 is a graph showing a relationship between a set temperature and combustion control in a conventional gas oven.

3 is a block diagram of a gas oven control unit to which the present invention is applied.

4 is a flowchart for explaining an operating state of the apparatus of the present invention.

5 is a graph showing the relationship between the set temperature and the combustion control in the gas oven to which the present invention is applied.

Explanation of symbols on the main parts of the drawings

2 door 10 key input 11 microcomputer

12: temperature detection unit 13: convection fan drive unit

14: solenoid drive unit 15: oven lamp drive unit

17 sparker drive unit 18 flame detection unit 19 display unit

20: Buzzer SW1: Door switch Th: Thermistor

111: door opening and closing recognition unit 112: correction time calculation unit

113: cooking time compensation unit 114: compensation time output unit

Claims (1)

Key input unit 10, microcomputer 11, temperature detection unit 12, flame detection unit 18, display unit 19, convection fan drive unit 13, sparker drive unit 17, electromagnetic valve drive unit 14 and the like A gas oven control apparatus comprising: a door opening / closing recognition unit (111) for recognizing an open and closed state of a door by using an output signal of a door switch (SW1) in the microcomputer (11); A correction time calculation unit 112 for receiving the output signal of the door opening / closing recognition unit 111 and the temperature detection unit 12 detecting the temperature of the oven chamber and calculating a time required to raise the temperature in the oven chamber to the set temperature; ; A cooking time compensator 113 configured to compensate the cooking time by adding the cooking correction time output from the correction time calculating unit 112 to the remaining cooking time; Correction of cooking time when the door is open during cooking of a gas oven, characterized by adding a compensation time output unit 114 for outputting the compensated cooking time output from the cooking time compensator 113 to the display unit 19. Device.