JPH07132189A - Washing machine - Google Patents

Abstract

PURPOSE:To provide the washing machine having an excellent performance, by which an instantaneous service interruption of a commerical power source is detected with high accuracy, and setting and reset of an operating state are evaded by reducing the power consumption. CONSTITUTION:An operation of a load 1 is controlled by a power switching means 6, and a power source supplied to the load 1 is opened and closed by a power source opening/closing means 7. A voltage obtained by stepping down a voltage of a commercial power source 9 is detected by a voltage detecting means 15, and inputted to a control means 16 together with an output of a power source synchronizing signal generating means 13 for generating a signal synchronized with the commercial power source 9. The control means 16 controls the load 1, the power switching means 6, the power source opening/closing means 7, etc., and also, detects an instantaneous service interruption of the commercial power source 9, in the case an output of the voltage detecting means 15 becomes a prescribed value or below, or in the case the output of the power source synchronizing signal generating means 13 is annihilated, stops the load 1 and a display of an operation display means 8 at the time when the instantaneous service interruption is detected, and executes an operation for evading setting and reset of an operating state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine for detecting an instantaneous power failure of a commercial power source.

[0002]

2. Description of the Related Art Conventionally, this type of washing machine has been constructed as shown in FIG. The configuration will be described below.

As shown in the figure, a load 1 is composed of a motor 2, a water supply valve 3, a drain valve 4, etc., and a power switching means 6 composed of a bidirectional thyristor etc. by a control means 5.
It is controlled via the control unit and operates sequentially according to each process of washing, rinsing and dehydration. The control means 5 can set reserved operation. The power supply opening / closing means 7 opens / closes the power supply to the load 1 and is controlled by the control means 5 so as to be opened in the reserved operation standby state. The operation display means 8 is for inputting operation settings such as turning on / off of the commercial power source 9, washing, rinsing, and dehydration, reserved operation settings, and the like, and displaying an operation state.

The water level detecting means 10 detects the water level in a washing / dehydrating tank (not shown) and inputs the output to the control means 5 so that water can be supplied up to a predetermined water level. The power supply transformer 11 steps down the voltage of the commercial power supply 9, converts the output voltage into a direct current by the direct current power supply 12, and applies it to the control means 5. The power supply synchronization signal generation means 13 generates a signal synchronized with the power supply waveform of the commercial power supply 9 necessary for the control of the control means 5. The power source open / close state detection means 14 detects the open / closed state of the power source open / close means 7, and when the power source open / close means 7 is in the closed state,
The change in the voltage of the commercial power supply 9 is monitored.

In the above configuration, the instantaneous power failure detection operation will be described with reference to FIG. The control means 5 is always connected to the commercial power source 9, and the power source synchronization signal generating means 13
The output of is constantly monitored. In step 30, the open / closed state of the power supply opening / closing means 7 is detected by the output of the power supply open / close state detecting means 14. When the power supply opening / closing means 7 is in the closed state, the process proceeds to step 31, and when the power supply opening / closing means 7 is in the open state,
Go to step 33. In step 31, it is monitored whether the output of the power supply synchronizing signal generating means 13 has disappeared. If the output has not disappeared, in step 32 the output level V0 of the power supply open / closed state detecting means 14 falls below a certain level Vth. Watch if you are not.

Output level v of the power supply open / close state detecting means 14
If 0 does not fall below a certain level Vth, it is determined that the momentary power failure of the commercial power source 9 has not occurred, and the process proceeds to the next step. If the output level has dropped below a certain level Vth, it is determined that an instantaneous power failure of the commercial power source 9 has occurred, and the routine proceeds to step 34. Also, step 31 and step 33
Even when the output of the power supply synchronization signal generating means 13 is extinguished, it is determined that the commercial power supply 9 has momentary power failure, and the control means 5 turns off the load 1 and the operation display means 8 in step 34. In this state, the power consumption is reduced, reset avoidance operation of setting and operating state is performed, and this series of operations is ended.

[0007]

In such a conventional washing machine, when the power source opening / closing means 7 is in the open state, the output of the power source opening / closing state detecting means 14 is in the off state, so that the power source synchronizing signal generating means 13 operates. Since the instantaneous power failure detection operation must be performed only from the output and the highly reliable instantaneous power failure detection cannot be performed, resetting of the initial standby state in which the power supply opening / closing means 7 is in the open state or the reserved operation standby state occurs, and the user Could cause distrust of the washing machine and could cause a malfunction crame. Further, the power supply open / closed state detection means 14 is usually composed of many circuit elements, and has a problem of high cost.

An object of the present invention is to solve the above problems, and it is an object of the present invention to make it possible to detect a momentary power failure of a commercial power source with low cost and high reliability even when the power source opening / closing means is open.

[0009]

In order to achieve the above object, the present invention provides a load such as a motor, a water supply valve and a drain valve, a power switching means for controlling the operation of the load, and a load. Power supply opening / closing means for opening / closing the power supply to be supplied, operation display means for inputting and displaying driving operations and settings, voltage detection means for detecting a voltage reduced from the commercial power supply voltage, and a signal synchronized with the commercial power supply And a control means for controlling the load, the power switching means, the power supply opening / closing means and the operation display means, the control means having an output of the voltage detection means equal to or less than a predetermined value. In the case, or when the output of the power supply synchronizing signal generating means disappears, the instantaneous power failure of the commercial power source is detected, and when the instantaneous power failure is detected, the display of the load and the operation display means is stopped, and the setting and That it has to perform rolling state of the reset avoidance operation is set to the first means for solving problems.

Further, the control means of the first problem solving means detects a failure of the voltage detection means when the time when the output of the voltage detection means is the predetermined value or less becomes the predetermined value or more, and the failure occurs. After the detection, the instantaneous power failure detection operation of the commercial power supply is performed by monitoring whether the output state of the power supply synchronization signal generation means disappears, and when the instantaneous power failure is detected, the display of the load and operation display means is stopped, and the setting and The second problem solving means is that the reset avoidance operation of the operating state is performed.

In addition, the control means of the second problem solving means is configured so that when the failure of the voltage detecting means is detected, the operation display means is informed of the abnormal state. As a means.

[0012]

According to the first means for solving the above problems, the present invention provides:
Regardless of the open / closed state of the power supply switching means, the outputs of both the voltage detection means and the power supply synchronization signal generation means are monitored, and when the voltage detected by the voltage detection means or the output of the power supply synchronization signal generation means is abnormal, the commercial power supply Instantaneous power failure can be detected, and the instantaneous failure of commercial power supply can be detected with high accuracy.

Further, the second problem solving means can detect the failure of the voltage detecting means, and the instantaneous power failure of the commercial power source can be detected even after the failure is detected.

Further, the third problem solving means makes it possible to display the failure of the voltage detecting means on the operation display means.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The same components as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the power supply detection means 15 detects the voltage on the secondary side of the power supply transformer 11, and
As shown in FIG. 3, it is composed of resistors R1 and R2 and a diode D, and its output is inputted to the control means 16. If the reserved operation can be set and the power switching means 6 is controlled by the control means 16 to sequentially control each process of washing, rinsing, and dehydration, and the output of the voltage detecting means 15 becomes a predetermined value or less, or When the output of the power supply synchronization signal generation means 13 disappears, the instantaneous power failure of the commercial power supply 9 is detected, and when the instantaneous power failure is detected, the display of the load 1 and the operation display means 8 is stopped to perform the reset avoidance operation of the setting and the operating state. I am trying to do it.

Further, the control means 16 has a voltage detecting means 15
When the output is less than a predetermined value for a certain time or more, a failure of the voltage detection means 15 is detected, and after the failure detection, it is determined whether the output state of the power supply synchronization signal generation means 13 has disappeared. By monitoring, the commercial power supply 9 performs an instantaneous power failure detection operation, and when the instantaneous power failure is detected, the display of the load 1 and the operation display means 8 is stopped, and the setting and operation state reset avoidance operation is performed. Further, when the failure of the voltage detecting means 15 is detected, the operation display means 8 notifies the user of the abnormal state. . The power supply opening / closing means 7 is composed of a relay, and the power switching means 6 composed of a bidirectional thyristor, the load 1, and the power supply opening / closing means 7 are connected in series in this order and connected to the commercial power supply 9.

The momentary power failure detection operation in the above configuration will be described with reference to FIG. 3. The control means 16 is always connected to the commercial power supply 9, and outputs the power supply synchronization signal generation means 13 and the voltage detection means 15 at all times. I'm watching. In step 20, it is monitored whether the output of the power supply synchronizing signal generating means 13 has disappeared, and if the output has not disappeared, in step 21, the output level V of the voltage detecting means 15 is detected.
Reservation wait, initial wait, wash, level Vt to be compared with uno
It is changed according to each process such as rinsing and dehydration and the display state of the operation display unit 8, that is, the amount of consumed current.

Next, at step 22, the voltage detecting means 1
The output level Vuno of No. 5 and the predetermined level Vt are compared to monitor whether the output level Vuno of the voltage detecting means 15 has dropped to the level Vt or lower. If the output level Vuno has not dropped below the predetermined level Vt, it is determined that the momentary power failure of the commercial power source 9 has not occurred, and the process proceeds to the next step. If the output level Vuno of the voltage detection means 15 has decreased to the predetermined level Vt or less in step 22, the process proceeds to step 23,
Start the timer-counter t0, step 24
Then, it is determined that the momentary power failure of the commercial power supply 9 has occurred, and the control means 16 turns off the load 1 and the operation display means 8 to reduce the power consumption and performs the reset avoidance operation of the operating state.

Next, in step 25, the value t0 of the timer-counter is compared with the reference value (predetermined value) T, and t0 is the reference value T.
If it exceeds, the process proceeds to step 26, it is determined that the voltage detection means 15 is in failure, and the subsequent instantaneous power failure detection operation is performed by monitoring only the output of the power supply synchronization signal generation means 13. Then, when it is determined that the voltage detection means 15 is out of order, an abnormality is displayed on the operation display means 8.

Further, even when the output of the power supply synchronizing signal generating means 13 is extinguished in step 20, it is judged that the momentary power failure of the commercial power supply 9 has occurred, and the process proceeds to step 24, and the control means 16 causes the load 1 Then, the operation display means 8 is turned off, power consumption is reduced, reset avoidance operation of the operating state is performed, and this series of operations is ended.

[0022]

As is apparent from the above description of the embodiments, according to the present invention, loads such as a motor, a water supply valve and a drain valve, power switching means for controlling the operation of the loads, and Power supply opening and closing means for opening and closing the power supply to the load, operation display means for inputting and displaying driving operations and settings, voltage detection means for detecting the voltage of the commercial power supply stepped down, and signal synchronized with the commercial power supply And a control means for controlling the load, the power switching means, the power supply opening / closing means and the operation display means, and the control means is such that the output of the voltage detection means is a predetermined value or less. When the output of the power supply synchronization signal generation means disappears, an instantaneous power failure of the commercial power supply is detected, and when the instantaneous power failure is detected, the display of the load and the operation display means is stopped and the setting is set. And the reset avoidance operation of the operating state are performed, therefore, regardless of the open / close state of the power source opening / closing means, the output state of both the power source synchronization signal generating means and the voltage detecting means is monitored to detect the momentary power failure of the commercial power source. As a result, the instantaneous power failure can be detected with higher accuracy, and by reducing the power consumption, the setting status and
It has excellent performance to avoid resetting the operating state and can improve reliability. Further, by using the voltage detection means instead of the power supply open / closed state detection means, the circuit configuration can be simplified and the cost can be reduced.

Further, the control means detects a failure of the voltage detection means when the time during which the output of the voltage detection means is less than or equal to the predetermined value exceeds a predetermined value, and after the failure detection, the power supply synchronization signal is detected. Performs an instantaneous power failure detection operation of the commercial power supply by monitoring whether or not the output state of the generation means has disappeared,
When a momentary power failure is detected, the display of the load and operation display means is stopped, and the setting and operation status reset avoidance operation is performed.If the voltage detection means fails, the failure can be detected, and even after the failure is detected, the power supply will continue to operate. The output of the synchronization signal generating means can detect the instantaneous power failure of the commercial power source, and the reliability can be further improved.

Further, the control means, when detecting the failure of the voltage detecting means, informs the operation display means of the abnormal state. Therefore, the failure of the voltage detecting means is displayed on the operation display means. Can inform the user.

[Brief description of drawings]

FIG. 1 is a block diagram of a washing machine according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of voltage detection means of the washing machine.

FIG. 3 is a flow chart showing an instantaneous power failure detection operation of the washing machine.

FIG. 4 is a control block diagram of a conventional washing machine.

FIG. 5 is a flow chart showing an instantaneous power failure detection operation of the washing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 load 2 motor 3 water supply valve 4 drain valve 6 power switching means 7 power supply opening / closing means 8 operation display means 13 power supply synchronization signal generation means 15 voltage detection means 16 control means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Masashi Kanetake 1006, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Hisayuki Imabashi, 1006, Kadoma, Kadoma City, Osaka

Claims (3)

[Claims] 1. A load such as a motor, a water supply valve, and a drain valve,
Power switching means for controlling the operation of the load,
A power source opening / closing means for opening / closing a power source to be supplied to the load; an operation display means for inputting / displaying a driving operation or setting;
Power supply synchronization signal generating means for generating a signal synchronized with a commercial power supply and control means for controlling the load, power switching means, power supply opening / closing means and operation display means are provided, and the control means includes the voltage detection means. When the output falls below a predetermined value, or when the output of the power supply synchronization signal generating means disappears, an instantaneous power failure of the commercial power source is detected, and the display of the load and operation display means is stopped when the instantaneous power failure is detected. , A washing machine designed to avoid setting and resetting operating conditions. 2. The control means detects a failure of the voltage detection means when the time during which the output of the voltage detection means is less than or equal to the predetermined value becomes a predetermined value or more, and after the failure detection, the power supply synchronization signal Performs an instantaneous power failure detection operation of the commercial power supply by monitoring whether or not the output state of the generation means disappears, and when the instantaneous power failure is detected, the display of the load and operation display means is stopped and the setting and operation state reset avoidance operation is performed. The washing machine as set forth in claim 1, wherein: 3. The washing machine according to claim 2, wherein the control means informs that the operation display means is in an abnormal state when the failure of the voltage detection means is detected.