JPH01121905A - Electric apparatus with buzzer turning-off function - Google Patents

Abstract

PURPOSE:To use a switch provided at present to turn on and off a buzzer by not taking a signal into a microcomputer in the initial state just after turning-on of a power switch of an electric apparatus and sounding an end/ abnormality reporting buzzer at the time of depression of an external operation switch for a time longer than the normal operation time. CONSTITUTION:A power switch 2 provided on the control panel of the electric apparatus like a washer has such function that the switch 2 is automatically turned off by power supply to a solenoid 7 if external operation switches 4 and 5 are not depressed within about 5min. When a start/temporary stop switch 16 is depressed for >=3sec before depression of an external operation switch 15 at the time of normal operation of this washer, a buzzer turning-off signal is stored in a RAM of a microcomputer 8, and the microcomputer does not perform a processing operation though the other switches are depressed. When a standard switch is depressed, the switch 16 is turned on and various functions are operated, and the power switch 2 is turned on when the operation end state continues for >=5min.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to electrical equipment that uses a buzzer to terminate and notify abnormalities. It concerns the most suitable method to carry out the procedure.

[Conventional technology]

In the conventional electric buzzer, the buzzer person.

Some devices have an on/off switch and a volume control knob, but electronic devices controlled by a microcomputer do not have a buzzer "on" due to cost issues and temperature resistance of the volume control knob. "Off" Does not have a volume control function.

[Problem that the invention seeks to solve]

In conventional electrical appliances, the buzzer for termination notification and abnormality notification is always turned on, and no consideration has been given to the buzzer noise during late night or early morning operation. to turn on the buzzer.
The aim is to eliminate the buzzer noise without increasing costs by making the switch OFF.

[Means for solving problems]

The above purpose is to prevent data from being input to the microcomputer in the initial state immediately after the power switch is turned on, and to prevent the termination and abnormality notification buzzer from sounding when the external operation switch is pressed for a longer time than the normal operation time. This is achieved by

[Function] When the power switch is turned on, the microcomputer determines whether the switch with the buzzer ``off'' function has been pressed for more than 3 seconds, and if it has not been pressed, the buzzer ``off'' is not processed and other external Performs normal processing to determine whether the operation switch is ON.

At this time, if it is determined that the switch with the buzzer "off" function has been pressed for more than 3 seconds, the buzzer off signal is sent to the microcomputer's RA.
Memorize it in M and end the buzzer.

The presence or absence of the buzzer off signal is checked at step i of the process of sounding the abnormality notification buzzer, and if there is, the process of stopping the buzzer notification is performed.

〔Example〕

An embodiment of the present invention will be described below.

Figure 1 shows the control panel of the washing machine, with the power ON/OFF switch 2. Pressure switch that detects the water level in the washing tub 3. External operation switch 4, 52 Hour display section 13. Reservation switch 11゜Reservation LED 12. Time setting switch 14 for setting the time. Cera l-switch 15. A progress display LED 6 is installed. FIG. 2 shows a block diagram of the control board of the washing machine, and its operation will be explained next.

When the pressure switch 3 is adjusted to a water level corresponding to the amount of clothing (for example, a low water level) and the power switch 1 is pressed to turn it on, power is supplied to low-power circuits such as a microcomputer and an LED display circuit. At this time, the power switch 2 is structured so that if the external operation switches 4 and 5 are not pressed within 5 minutes, the solenoid 7 is energized and the power switch 2 is automatically turned off.

For normal operation without reservation, external operation switch 1
If the start/pause switch 16 is pressed for 3 seconds or more before pressing 5, the buzzer off signal will be stored in the microcomputer's RAM. Even if this start/pause switch 16 is pressed before pressing any other switch, the microcomputer does not perform any processing such as turning on or operating the LED. Next, when you press the standard switch, the auto-on switch 16 turns on.
Washing for 10 minutes, rinsing twice, dehydration for 5 minutes is set, the water supply valve is energized, water supply starts, and after that, stirring and rinsing.

After each process of dehydration is automatically operated and washing is completed, if the machine is left as it is for more than 5 minutes, the solenoid 7 is energized and the power switch is automatically turned off in the same way as when the power switch is in the "on" state.

Next, in the case of reserved operation, after turning on the power switch,
Setting the time 14. After setting the current time using the switch in set 15 (e.g. 8:00 p.m.).

When the reservation switch 11 is pressed, the reservation LED 12 lights up and the auto-on switch is turned off. After this, time setting 14. A reserved time (washing end time) is set using the switch in the set 15, and when the standard button on the external operation button 4 is pressed (for example, at 7 a.m.), the reserved operation is started. At this time, from 8:00 pm to 6:28 am (because the standard cycle requires about 32 minutes, so washing starts at 6:28 am), the reservation is on standby, and the reservation time and time are displayed. I am doing a count. At this time, the auto-on switch is OFF.
It is in F state and the high voltage circuit is cut off.

At 6:28 a.m., the O 1-Ounce Inch 16 is automatically turned on, the high-voltage circuit is connected to the power supply, and then a drive signal is output from the microcomputer, and the set standard 2<g cycle (10 minutes washing The program automatically performs each process (rinsing twice and spin-drying for 5 minutes) to finish the washing process, but in the case of reserved operation, the buzzer off signal is always output after the reserved switch 11 is turned on, and the program is stored in the RAM. Therefore, the buzzer does not sound after washing is complete, and all outputs are turned off to complete the entire process. The lid switch 10, which is turned ON and OFF by opening and closing the lid, is normally turned OFF when the lid is closed.
It is F. Auto-on switch 16 is OFF while waiting for reservation.
Since it is set to F, even if the lid switch 10 is ON, no output is generated in the sensor intake circuit, and the microcomputer 8 is always reading that the lid switch is OFF, but the auto-off switch is currently on reservation due to welding of the contacts etc. If the auto-on switch 16 is turned on, the lid switch 10 is turned on and the microcomputer 8 determines that the reading is abnormal, and the progress display LED 6 blinks to indicate that the auto-on switch 16 is abnormal.

In this embodiment, the auto-on switch 16 has a structure in which a switch having mechanical contacts is operated by a solenoid, which is a weak point of the electronic circuit. It is designed to prevent destruction by external noise, M surges, etc., making it ideal as a highly reliable safety circuit.It is also electrically safe because the contact person who opens and closes the high-voltage circuit and the solenoid in the drive unit can be easily electrically separated. This has the advantage of being able to increase performance, and has the effect of creating a highly reliable and inexpensive safety circuit.

In the present invention, operation is started after manually setting each process such as "washing", "rinsing", "dehydration J", etc.Alternatively, a start/pause switch is used to temporarily stop operation during operation. However, if it is a switch that does not input the switch input to the microcomputer even if it is pressed after the power switch is turned on, another switch, such as the time setting switch 14, can be used.
It may also be done by

In this embodiment, the buzzer is turned off only when the button is pressed for 3 seconds or more, which has the effect of eliminating malfunctions caused by erroneous pressing.

Furthermore, by pressing the start/pause switch 16 several times at short intervals, it is possible to have the same function as pressing and holding it for three seconds or more.

Also, when the auto-on switch opens and closes, the heavy current load is turned off.
Since it is in the F state, there is no need to cut off the current when opening and closing, and a switch with a low rating can be used, resulting in an inexpensive switch. Further, in the case of mechanical contacts, there is an effect that welding of the contacts due to arc can be prevented.

〔Effect of the invention〕

1. In the present invention, an existing switch that performs other operations is used in common with a switch that does not capture the signal of the switch after the power switch, so it is cost-effective and the buzzer can be turned on. ” and “off”, and when the switch is pressed, the load does not operate and the LED does not come on, making it easy for the user to use.

2. When turning off the buzzer, it is determined in a longer time than the normal switch take-in time, so it is possible to prevent incorrect presses.

3. When the buzzer "off" switch is pressed, the tone is different from the normal switch ON confirmation sound, but the length of the sound is longer, so you can easily confirm the function you have selected even if the switch is shared.

4. Even when the buzzer is "off", the buzzer sounds to confirm that the switch is on, so even when the buzzer is "off", the switch is still on.
N can be notified to the user.

[Brief explanation of the drawing]

Figure 1 shows the panel section and the second section of the fully automatic washing machine according to the embodiment of the present invention.
The figure is a block diagram of the controller of the present invention, and Figure 3 is the flowchart of the buzzer "off" function of the present invention. Sound for equipment correction “I = f'l busy relationship Patent applicant + 51t 1/1 convention + 1 Hitachi representative Dimensions of human correction

Claims (1)

[Claims] 1. In a device that uses a buzzer to notify completion and abnormality, in the initial state after the power switch is turned on,
The buzzer notification can be turned off by pressing a switch that does not capture ON signals (a switch that captures ON signals only when another switch is pressed or while the device is operating). An electrical appliance with a buzzer "off" function. 2. The electrical appliance according to claim 1, wherein the buzzer "off" switch is a "start/pause" switch. 3. The electrical appliance according to claim 1, wherein the buzzer "off" switch is determined to be an "off" input when the buzzer is input for a longer time than the normal switch take-in time. 4. The electrical appliance according to claim 1, wherein when the buzzer "off" switch is pressed, the tone or notification time is different from the normal switch intake confirmation sound. 5. Even when the buzzer is in the "off" state, only the manual operation switch input confirmation notification is provided by the buzzer in a manner similar to the first claim.
Electrical equipment listed in section. 6. The electrical appliance according to claim 1, wherein the buzzer is turned off by pressing the buzzer off switch again.