KR20020018383A - Method for controlling safety of microwave oven - Google Patents

Abstract

PURPOSE: A safe operation method of a microwave oven is provided to prevent fire by discharging gas from the microwave oven with using a convective fan in driving a magnetron over the reference time. CONSTITUTION: Cooking is started in inputting cooking time(200), and a magnetron is driven with a control unit. The control unit counts cooking hours in driving the magnetron, and detects counting time to be over 30 minutes(210). Cooking is finished at the established cooking time in case of the magnetron driving time to be less than 30 minutes(220). A convective motor is installed in the rear part of a cooking chamber, and driven with the control unit(230). The convective motor is actuated in passing 30 minutes after driving the magnetron to the established cooking time(240). Fire is prevented with discharging gas by driving a convective fan in driving the magnetron over the reference value.

Description

Safe operation method of microwave oven {Method for controlling safety of microwave oven}

The present invention relates to a safe operation method of a microwave oven, and more particularly, to a safe operation method of a microwave oven for controlling safe operation using a convection circulation fan in the microwave operation mode.

A microwave oven is a cooking apparatus that uses a magnetron or a heater as a heating source and electrically drives the heating source to perform cooking. As with most electronic devices, electricity-based electronics offer convenience and efficiency in real life, but on the other hand, electronic devices are exposed to very high risks such as fire and electric shock. Therefore, electronic devices using electricity should place a large weight on safety before providing convenience, and this has a great effect on reliability and purchasing power of products.

Conventional multifunction microwave ovens are controlled to operate the product under conditions set by the user in the microwave operation mode. That is, as shown in Fig. 1, after the user inputs the operating time T for driving the magnetron (step 100), it is determined whether the current time reaches the set operating time T. Cooking is continued until completion (step 110).

Therefore, when the current time reaches the set operation time T in step 110, the operation of the product is stopped, and the user inputs a separate condition key (for example, a 'stop key') until the operating time T is reached. ') Or the microwave continues to perform cooking operations under the set condition until the user directly cuts off the power.

As described above, the safety device of a conventional microwave oven operated under the setting conditions of the user is generally made by mechanical control. That is, it is a structure that connects a temperature element such as a thermostat to a power terminal input from the outside into the product, and the power input into the product is blocked by the operation of the thermostat.

In such a case, the microwave oven continues to operate under a user setting condition until the mechanical safety device operates. On the other hand, mechanical safety devices such as the thermostat is configured to operate only when the flame is present in the oven after the food is ignited. Therefore, the conventional microwave oven has no way to control even if the food is exploded or ignited and the flame is exposed to the outside of the product until the mechanical safety device is operated.

In addition, in the conventional microwave oven, even when exposed to the risk of fire due to a malfunction of a user or a long time operation, there was no way to cut off the power input into the product before the operation of the mechanical safety device. Therefore, the user recognizes the overheating of the product only after a fire occurs in the product, which causes a problem that causes a safety risk along with damage to the product.

Accordingly, an object of the present invention is to provide a safe driving method of a microwave oven which can prevent a fire caused by a user's malfunction or overheating of a product due to a long time driving.

1 is a control method of a microwave oven according to the prior art,

2 is an operation flowchart for the safe operation of the microwave oven according to the present invention;

3 is a configuration diagram for safe driving of the microwave oven according to the present invention.

Explanation of symbols on the main parts of the drawings

10: cooking chamber 15: magnetron

20: cooling fan 25: fan

30: convection circulation fan 30: convection circulation fan motor

Safe operation method of a microwave oven according to the present invention for achieving the above object comprises a first step of driving under a condition set by the user in the microwave operation mode; and a second step of counting the driving time of the first step; ; Terminating cooking when the counted time reaches a user set time; When the cooking is in progress so that the driving time of the first step passes a predetermined time, it comprises a fourth step of performing a safe mode according to the operation of the convection circulation fan.

Hereinafter, a safe driving method of a microwave oven according to the present invention will be described in detail with reference to the accompanying drawings.

The safe operation method of the microwave oven according to the present invention is characterized in that a safe operation is performed by using a convection circulation fan when cooking by microwave waves in a multifunctional microwave oven using a heater / magnetron or the like as a heating source. have.

That is, in the microwave oven of FIG. 3, the convection circulation fan 35 installed at the rear side of the cooking chamber 10 in which cooking is performed may be used to supply gas in the cooking chamber 10 in the microwave operation mode. Used to discharge. In general, the convection circulation fan 35 is operated only during cooking of the heater to operate to blow hot heat generated by the heater into the cooking chamber 10. However, in the present invention, the convection circulation fan 35 is driven at a certain point in the microwave operation mode, thereby preventing the risk of fire due to the long time operation of the microwave mode.

In addition, in the microwave oven of the present invention, the magnetron 15 is installed in the electric compartment close to the side wall of the cooking chamber 10, and the cooling fan 20 that operates to cool the heat of the components when the magnetron 15 is driven. ) Is installed around the magnetron 15.

Reference numeral 25 is another fan which is provided on the same motor 30 as the convection circulation fan 35 and forms an air flow in the opposite direction to the convection circulation fan 35. The fan 25 is used for cooling the heat of the fan motor 30 by the driving of the convection circulation fan 35.

Next, a process of performing safe driving in the microwave operation mode of the multifunctional microwave oven of the present invention having the above configuration will be described.

In general, most of the cooking in the microwave mode of operation is performed within 30 minutes. However, when the malfunction of the user is used for a long time, the convection circulation fan 35 is driven.

2 illustrates a safe driving method of a microwave oven according to the present invention.

In the operation mode in which the cooking by the microwave wave is to be performed, when cooking is started after the cooking time is input by the user (step 200), the controller (not shown) drives the magnetron 15. In addition, the cooling fan 20 is operated to prevent damage to peripheral components due to the driving of the magnetron 15.

When the driving of the magnetron 15 is started, the controller counts the time for cooking. In operation 210, it is determined whether the counted time exceeds 30 minutes.

After driving of the magnetron is started in step 210, when the cooking time is not exceeded 30 minutes and the current time reaches the cooking time input in step 200 (step 220), the cooking is finished. That is, since most of the cooking performed in the general microwave operation mode is performed within 30 minutes, the cooking is controlled to the end of cooking by step 220 through step 210.

However, in a state in which the operation is performed for a malfunction of the user or for a long time, after the magnetron is started in the 200th step, the operation time of the 210th step may exceed 30 minutes.

In this case, the controller (not shown) drives the convection circulation motor 30 installed at the rear of the cooking chamber 10 (step 230). When the convective circulation motor 30 according to step 230 starts to drive, the convective circulation fan 35 installed on the motor 30 is driven, from the inside of the cooking chamber to the outside, from the outside of the cooking chamber to the inside. Generate a circulating air stream. The hot air and gas inside the cooking chamber 10 are discharged to the outside of the cooking chamber by the generated air flow.

At this point, the reverse circulation fan 25, which creates an air flow opposite to the convection circulation fan 35, cools the heat caused by the driving of the convection circulation motor 30.

As described above, after the magnetron 15 is driven in the microwave operation mode, the convection circulation motor 30 is driven at a time when a predetermined time (about 30 minutes) has elapsed, and until the cooking time set by the user is reached. The convection circulation motor 30 is continuously driven (step 240).

That is, the present invention has a risk that a fire may occur when the microwave operation mode is continued for a predetermined time or more in a multi-functional microwave oven equipped with a heater / magnetron. . To this end, the present invention is characterized by using a convection circulation fan that operates for convection circulation in general heater cooking.

As described above, the safe driving method of the microwave oven according to the present invention is intended to prevent a fire from being generated due to the gas generated as the food is ignited due to misuse of the user in the microwave operation mode. Therefore, in the present invention, when the driving of the magnetron lasts for a predetermined time, the advantage of preventing the occurrence of fire by discharging the gas in the air using a convection circulation fan.

Claims (1)

A first step of driving under a condition set by a user in a microwave operation mode; A second step of counting a driving time of the first step; Terminating cooking when the counted time reaches a user set time; And a fourth step of performing a safe mode according to the operation of the convection circulation fan when cooking is performed such that the driving time of the first step passes a predetermined time.