KR100389393B1 - Method for controlling safety of microwave oven - Google Patents

Abstract

The present invention relates to a safe driving method of a microwave oven, and more particularly, to a safe driving method of a microwave oven for controlling safe driving using a humidity sensor in a microwave operation mode. To this end, the present invention starts cooking at the time when the cooking time is 30 minutes in the microwave operation mode of the microwave oven, the humidity is based on the detection that the level lower than the humidity generated during normal cooking is safe Perform the mode. The safety mode of the present invention achieves the effect of preventing the occurrence of fire by controlling the power level of the microwave wave to "0" during the set cooking time.

Description

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

The present invention relates to a safe driving method of a microwave oven, and more particularly, to a safe driving method of a microwave oven for controlling safe driving using a humidity sensor in a 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 capable of performing safe driving of a microwave oven using a humidity sensor in a microwave operating mode.

1 is a flowchart illustrating an operation process of a microwave oven according to the prior art;

2 is a configuration diagram for safe driving control of a microwave oven according to the present invention;

3 is an operation flowchart for safe driving control of a microwave oven according to the present invention;

Explanation of symbols on the main parts of the drawings

10: humidity sensor 15: control unit

20: magnetron 25: cooling fan

30: signal input unit

Safe operation method of a microwave oven according to the present invention for achieving the above object, the first operating time for cooking control in the microwave operation mode, the first controlling the cooking until reaching the first operating time Steps; A second step of setting a safe driving time so as to include a time at which all cooking included in the microwave operation mode can be performed, and monitoring whether the safe driving time has elapsed during the cooking control according to the first step; A third step of detecting an amount of humidity in the cavity when the cooking of the first step is not finished such that the safe driving time has elapsed in the second step; A fourth step of maintaining the cooking control of the first step when the amount of humidity detected in the third step is higher than or equal to a predetermined level, and controlling the power level of the microwave wave to be "0" below or equal to the predetermined level; In the fourth step, the first step of cooking is performed until the first operation time is reached even after adjusting the power level of the microwave wave. Hereinafter, the microwave according to the present invention will be described with reference to the accompanying drawings. The safe driving method will be described in detail.

As shown in FIG. 2, the microwave according to the present invention senses the humidity inside the cavity generated in the cooking process in the microwave operation mode using the humidity sensor 10, and sets the optimum time for the cooking. Will proceed. Therefore, the humidity inside the cavity detected by the humidity sensor 10 is input to the control unit 15, the control unit 15 calculates the optimal time of the cooking based on the detected humidity, accordingly the magnetron 20 To drive. In addition, the cooling fan 25 operates to prevent damage to surrounding components due to heat caused by the driving of the magnetron 20. Reference numeral 30 denotes a signal input unit 30 for inputting cooking conditions and the like by user selection.

Safe operation control of the microwave oven according to the present invention made of the above configuration is made as follows.

3 is an operation flowchart for the safe operation of the microwave oven according to the present invention.

In general, cooking in the microwave mode of operation takes less than 30 minutes. However, when the magnetron generating microwave waves due to a user malfunction or a long driving time is overheated, the cooking food is burned in the cavity, and a fire may be generated in the cavity by the gas generated in the cooking food.

Therefore, the present invention recognizes that a difference occurs between the humidity detected in the cavity during cooking and the amount of humidity detected inside the cavity after the cooking is completed, and the detected humidity for safe driving. Use quantity.

That is, when the operation time of the magnetron 20 is input through the signal input unit 30 in order to cook in the microwave operation mode (step 200), a predetermined time (about 30 minutes) is reached until the predetermined time (about 30 minutes) is reached. Proceed with cooking conditions.

After the start of driving according to the 200th step, before reaching a predetermined time (about 30 minutes), when the time set by the user reaches (step 206), cooking is completed.

However, if the time set by the user is not reached even after reaching the predetermined time (about 30 minutes) after the start of the driving in step 200 (step 203), the process proceeds to the safe driving mode.

First, the humidity inside the cavity is detected through the humidity sensor 10 (step 209). When the humidity detected in the step 209 is a predetermined level or more (step 212), the controller 15 performs a normal operation still applying the cooking conditions set in the step 200 (step 215).

In this case, step 212 is for determining whether the cooking is in progress or the cooking is completed using the detected humidity. This is detected in proportion to the moisture in the cavity while the cooking is in progress and detected as humidity in the cavity. Humidity is also lowered.

In operation 218, it is determined whether the cooking time set by the user has been reached, and when the set time is reached, cooking is terminated.

However, when the humidity detected in the step 212 is less than a predetermined level, the controller 15 adjusts the power level of the magnetron 20 to "0" (step 221). The other parts control to ensure normal operation.

When the cooking time set by the user is reached in such an operation state, the cooking is terminated (step 224).

That is, the present invention detects the amount of humidity inside the cavity using a humidity sensor after a predetermined time in the microwave operation mode, and determines whether the product is overheated or normal operating state based on the detected amount of humidity.

In addition, the present invention can also prevent overheating of the product due to malfunction of the consumer under no load.

Therefore, even if the magnetron 20 is driven in the cavity under no load due to a malfunction of the user, a safety mode is performed based on the amount of humidity detected by the humidity sensor 10 at the point of time elapsed 30 minutes by the step 203. The power level of the magnetron is adjusted to "0" to prevent overheating.

That is, the present invention controls the sensor to perform the sensing operation in the normal operation using the humidity sensor used in the cooking of the microwave, and in the operation mode according to the safe mode based on the detection value of the microwave wave The technical idea is to implement a safe mode with the power level operating at "0".

Therefore, the present invention starts cooking at the time when the cooking time is 30 minutes in the microwave wave operation mode of the microwave oven, the humidity is detected at a level lower than the humidity value generated during normal cooking, the microwave wave at this time By controlling the power level of the, the effect of preventing the occurrence of fire is obtained.

In addition, the present invention may operate the product by misuse by the consumer even under no-load condition, but if the sensor detects at a time when 30 minutes elapses and a humidity of a lower level is detected than during normal operation, By controlling the power level to 0, the effect of preventing safety problems is obtained.

Claims (2)

A first step of setting a first operation time for cooking control in the microwave operation mode and controlling cooking until the first operation time is reached; A second step of setting a safe driving time so as to include a time at which all cooking included in the microwave operation mode can be performed, and monitoring whether the safe driving time has elapsed during the cooking control according to the first step; A third step of detecting an amount of humidity in the cavity when the cooking of the first step is not finished such that the safe driving time has elapsed in the second step; A fourth step of maintaining the cooking control of the first step when the amount of humidity detected in the third step is higher than or equal to a predetermined level, and controlling the power level of the microwave wave to be "0" below or equal to the predetermined level; Safe operation method of the microwave oven, characterized in that the cooking of the first step is proceeding until the first operating time is reached even after adjusting the power level of the microwave wave in the fourth step. delete