KR19990005176A - Automatic adjustment of the buzzer sound of the microwave oven - Google Patents

Abstract

The present invention relates to a method for automatically adjusting the buzzer sound of a microwave oven, and in the related art, since the pitch of the buzzer sound is fixed at a constant time, when watching TV in a room, or when the audio such as a radio is turned on or in a conversation, the user cannot hear another buzzer sound when the cooking ends. There was a disadvantage that a case occurred.

Therefore, the present invention includes a voltage adjusting means for controlling the voltage supplied to the buzzer under the control of the microcomputer in multiple stages, and when the microcomputer generates the buzzer sound, the voltage adjusting means is supplied to the buzzer as time passes. By increasing the voltage, the buzzer will sound louder over time, allowing the user to easily recognize the operating status of the microwave oven.

Description

Automatic adjustment of the buzzer sound of the microwave oven

In general, the microwave oven is configured to generate a buzzer sound as an effect sound for notifying a user when cooking is completed, or when cooking completion or an error occurs.

1 is a configuration diagram of a buzzer driving device of a conventional microwave oven, and as illustrated therein, a key board 10 having various operation buttons such as cooking start, stop, automatic cooking, power, manual, grill, and the like, and a key board thereof. The microcomputer 20 which controls various functions of the microwave while receiving the key signal of 10 and controls the buzzer sound generation, and the buzzer driver which drives the buzzer 40 based on the drive signal of the microcomputer 20. It consists of 30.

The buzzer driver 30 applies the driving signal of the microcomputer 20 to the base of the transistor Q1 through the resistor R1, and applies the resistor R2 between the base of the transistor Q1 and the grounded emitter. And a collector of the transistor Q1 is connected to one control terminal of the buzzer 40.

In the conventional microwave buzzer driving device, when the microcomputer 20 outputs a buzzer driving signal when the microcomputer 20 wants to notify a key input or various cooking conditions, the transistor Q1 of the buzzer driving unit 30 is turned on. As the transistor Q1 is turned on, a current path is formed in which one terminal of the buzzer 40 is connected to the ground terminal, thereby driving the buzzer 40.

As described above, in a conventional microwave oven, a buzzer is used to output a beeping sound, and the user is notified of the cooking state. The microcomputer 20 outputs a single long sounding beep to notify a key input at various key inputs. , In the case of cooking termination, it generates sound effects that generate three beep sounds consecutively-beep--, beep--, beep-- even if it is configured to repeat several cycles at regular time intervals according to the program. have. In the case of the flipping time, the beep is repeated several times in succession, such as beep beep, beep beep, beep beep, ... ... ....

As described above, in a conventional microwave oven, one sound (beep) is distinguished by a long sound or a single sound to generate a sound effect by adjusting a continuous frequency or a repetition period, which is the size of the buzzer sound. have.

In the microwave, if the buzzer sounds according to the cooking condition, the thawing or roasting cooks the buzzer when it is flipped and when the cooking is completed. If it is missed, the complete thawing or roasting is performed properly. If the cooking is not done, the cooking may be inferior, and there is cooking (eg, simple warming) that should not be left for too long even when the cooking is finished. Therefore, the user should take action at a suitable time.

However, since the buzzer sound level of a conventional microwave oven is usually set in consideration of a quiet indoor, when the user is not in the vicinity of a microwave oven and is in a room, especially when the TV is turned on, the audio is turned on, or the conversation is performed with another person, the microwave oven is used. Cooking often fails because the buzzer is not easily heard.

Therefore, an object of the present invention is to solve the above problems, by automatically adjusting the size of the buzzer sound to increase gradually over time, so that the user can easily recognize the cooking state of the microwave oven buzzer automatic To provide a control method.

The object of the present invention is to include a voltage adjusting means for controlling the voltage supplied to the buzzer under the control of the microcomputer in multiple stages, and when the microcomputer generates the buzzer sound, the voltage adjusting means is controlled as time passes. This is achieved by increasing the voltage supplied to the buzzer step by step.

Accordingly, the present invention achieves an object for easily recognizing the user because the buzzer sounds in stages as time goes by when the buzzer sounds.

1 is a configuration diagram of a buzzer driving device of a conventional microwave oven.

2 is a configuration diagram of a buzzer driving device of a microwave oven according to the present invention;

3 is a flow chart of the automatic control of the buzzer sound of the microwave oven according to the present invention.

* Explanation of symbols for main parts of the drawings

10: keyboard 20: micom

30: buzzer drive unit 40: buzzer

100: voltage adjusting unit

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a configuration diagram of the buzzer driving device of the microwave oven according to the present invention. As shown in FIG. 2, a keyboard 10 having various operation buttons such as cooking start, stop, automatic cooking, power, manual, grill, and the like, The microcomputer 20 controls the various functions of the microwave oven while receiving the key signal of the keyboard 10 and drives the buzzer 40 based on the driving signal of the microcomputer 20. In the microwave buzzer driving device composed of a buzzer driving unit 30, including a voltage adjusting unit 100 for adjusting the drive voltage supplied to the buzzer 40 in a multi-step based on the control of the microcomputer 20 It is composed.

According to the present invention configured as described above, when the microcomputer 20 drives the buzzer 40, the driving voltage supplied to the buzzer 40 is adjusted by controlling the voltage adjusting unit 100 step by step as time passes. This automatically adjusts the buzzer sound louder and louder over time.

As described above, the method of automatically adjusting the buzzer sound is programmed in the microcomputer 20 so as to control the buzzer automatically. As shown in the flowchart of the automatic adjustment of the buzzer sound of the microwave according to FIG. Determining whether the cooking stop mode is a mode for generating a buzzer sound; if the mode is for buzzer sound, determining whether the door is opened to determine whether the buzzer sound generation mode is released; and when the door is not opened Generating a buzzer sound according to a preset buzzer cycle according to the flip mode or the cooking end mode, checking whether the buzzer sound has elapsed a predetermined time according to the flip mode and the cooking end mode, and when the predetermined time elapses, The counter of the corresponding mode is incremented by 1 and based on the incremented counter value Raising the low output is made to perform the step of repeating the above process until the door is opened.

This is set in the microcomputer 20 in the flip mode and the cooking end mode, each of which sets the buzzer sound, and sets the total time to sound the buzzer for each mode. For example, in the flip mode, repeating at regular intervals with a period of Pippi, Pippi, and Pippi, and set the entire buzzer ringing time for about 10 minutes. Likewise, in the cooking stop mode, repeat the beep-, beep-, beep-and set the entire ringing time to about 10 minutes.

As such, the buzzer sound control method is preset in the microcomputer 20 according to the mode, and in the present invention, in the flip mode, the buzzer is in the flip mode until the door is opened or 10 minutes, which is the entire buzzer ringing time of the preset flip mode, elapses. When the predetermined time (for example, 5 seconds) set for the buzzer sound control has elapsed, increase the flip counter by one, and control the voltage adjusting unit 100 based on the counter value to output the buzzer sound. Up. Repeatedly increases the volume of the buzzer every 5 seconds to inform the consumer of the flip mode. In addition, in the cooking end mode, the operation is similarly performed, and the buzzer sound is raised one step at 10 second intervals until the door is opened or the set 10 minutes has elapsed.

Therefore, according to the present invention, if the user does not open the door in the flip mode or the end of cooking mode, the volume of the buzzer is gradually increased as time passes and the user is easily informed of the cooking state.

As described above, the present invention has an effect of allowing the user to easily recognize the cooking state of the microwave by making the buzzer sound gradually over time when the buzzer sounds in the flip mode or the cooking end mode. .

The present invention relates to a method for automatically adjusting a buzzer sound of a microwave oven, and more particularly, to provide a method for automatically adjusting a buzzer sound of a microwave oven so that a user can easily recognize the sound as time goes by when a buzzer sound is generated. It is to.

Claims (3)

In the method for controlling the buzzer sound of the microwave oven, when the microcomputer 20 generates a buzzer sound, it is provided with a voltage adjusting means for controlling the driving voltage supplied to the buzzer 40 under the control of the microcomputer 20. Automatic control method of the microwave oven, characterized in that the control of the voltage control means by a certain time unit as the time for generating the buzzer sound to increase the voltage supplied to the buzzer step by step to automatically adjust the size of the buzzer sound . The method of claim 1, wherein the microcomputer 20 determines whether it is a mode for generating a buzzer sound by determining whether it is a flip mode or a cooking end mode, and if it is a mode for ringing a buzzer sound, by determining whether the door is opened. Determining whether the generation mode is released, generating a buzzer sound at a preset buzzer cycle according to the flip mode or the cooking end mode when the door is not opened, and generating a buzzer sound according to the flip mode and the cooking end mode, respectively. Checking whether the time has elapsed, and if the predetermined time has elapsed, incrementing the counter of the corresponding mode by 1, and repeating the above process until the door is opened while raising the buzzer output based on the increased counter value. Buzzer sound of the microwave oven, characterized in that it is configured to automatically adjust the buzzer sound How automatic adjustment. The microwave buzzer of claim 1, wherein the microcomputer 20 increases the output of the buzzer sound by one step every 5 seconds in the flip mode and the output of the buzzer sound by one step every 10 seconds in the cooking finish mode. Automatic adjustment method.