JPH0520020A - Display device - Google Patents

Abstract

PURPOSE:To make a user not feel distrustful and to suppress the power consumption during the stop of electric equipment if the electric equipment becomes abnormal. CONSTITUTION:If various electric equipment such as an electric washing machine becomes abnormal, a microcomputer 100 displays information showing the occurrence of the abnormal state through a display control circuit 102 and also stores the information in a 2nd RAM 100b and when a power switch operation detecting circuit 109 detects the equipment being powered OFF with a power switch 3 OFF, the display of the information is inhibited, but when the power supply is restarted, the information stored in the storage means is displayed under the control of the microcomputer 100.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a display device that displays information indicating the occurrence of an abnormal state when an abnormal state occurs in the electric device.

[0002]

2. Description of the Related Art In an electric device such as a washing machine which is driven by electric power, its operation state is monitored to detect an abnormality of the electric device, and when the abnormal state of the electric device is detected, the electric device is detected. Indicates that is in an abnormal state,
For example, a display device as disclosed in Japanese Utility Model Publication No. 2-41753 is provided.

In the electric equipment, when an outlet is connected to a power source, its drive system is supplied with power via a power switch, and its control system is supplied with power without passing through the power switch. The display device displays an abnormal state based on a signal from the control system. Therefore, in the display device, the power switch is turned off due to the occurrence of the abnormal state, and the display of the abnormal state is continued even after the operation of the electric device is stopped.

[0004]

However, in the conventional display device as described above, when an abnormal state of the electric equipment is detected, the power switch is turned off after the detection and the operation of the electric equipment is stopped. Even if the abnormal state is displayed, the abnormal state continues to be displayed, which may give the user a sense of distrust that the electrical device is operating despite the abnormal state. There is a problem that unnecessary power is consumed when the power switch is turned off due to the continuation of the display of the abnormal state after the power switch is turned off.

The present invention has been made in view of such circumstances, and it is possible to prevent the user from feeling distrust while the electric device is stopped when the electric device is in an abnormal state. It is an object of the present invention to provide a display device capable of suppressing the consumption amount.

[0006]

A display device according to the present invention is provided in an electric device, and when an abnormal condition occurs in the electric device, the display device displays information indicating the occurrence of the abnormal condition. Storage means for storing information, means for detecting that power supply to the electric device is cut off, and means for prohibiting display of the information when the power supply is cut off by the means And a means for displaying the information stored in the storage means when the power supply is restarted.

[0007]

When an abnormal state occurs in the electric equipment, the information indicating the occurrence of the abnormal state is displayed and stored in the storage means. Then, when the power supply to the electric device is cut off in such a state, it is detected that the power supply to the electric device is cut off,
Based on this detection result, the display of the information indicating the occurrence of the abnormal state of the electric device is prohibited, and when the power supply is restarted, the information stored in the storage means is displayed. That is,
It is unnecessary to display information indicating the occurrence of an abnormal state of electrical equipment.While power supply to electrical equipment is cut off,
Since the information indicating the occurrence of the abnormal state is not displayed, unnecessary power consumption related to the display of the information is not performed during this period.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings showing the embodiments. FIG. 1 is a perspective view of a washing machine to which the display device according to the present invention is applied.

In the figure, reference numeral 1 is a box-shaped frame. An operation unit 2 that accommodates devices such as electronic components at the front edge of the upper surface of the frame 1 and has various operation keys described later and a display device corresponding to the display device of the present invention disposed on the upper surface thereof. Are formed. A power switch 3 that is turned on and off to supply and release power to the drive system is provided at the rear edge of the upper surface of the frame 1. Between the operation unit 2 and the power switch 3 on the upper surface of the frame 1, there is provided an upper lid 10 which is opened / closed for loading / unloading laundry.

FIG. 2 is a schematic vertical sectional view of the washing machine. Inside the frame 1, an outer tub 4 which is a bottomed cylindrical water tub is arranged with its opening facing upward. Inside the outer tub 4, a cylindrical inner tub 5 with a bottom having a plurality of dehydration holes 51, 51, ... Is provided rotatably with its opening facing upward. The laundry is stored in the inner tub 5. At the bottom of the inner tank 5, rotary blades 6 for generating a water flow in the outer tank 4 and the inner tank 5 are provided.

Below the outer tank 4, a motor 7 for rotating the inner tank 5 and the rotary blades 6 is provided.
The driving force is applied to the inner tub 5 and the rotary blades 6 via a power transmission mechanism including a power transmission device such as a speed reducer. A water supply solenoid valve (not shown) for supplying water into the outer tub 4 is provided in the upper part of the frame 1, and the water in the outer tub 4 is drained to the outside of the machine at the bottom of the outer tub 4. A drainage port 41 is provided for this. To this drainage port 41, one end of a drainage hose 43 provided with a drainage solenoid valve 42 in the middle is connected, and the water in the outer tub 4 is discharged from the drainage hose 43 by opening the drainage solenoid valve 42. It is designed to be drained outside the aircraft. An electric heater (not shown) for heating the water in the outer tub 4 is provided at the bottom of the outer tub 4.

An air trap 44 for detecting the water level in the outer tub 4 is provided on the rear side of the bottom of the outer tub 4, and the air trap 44 is provided in the upper part of the frame 1 to a water level sensor 91. To the pressure hose 45. A water temperature sensor 92 for detecting the temperature of water in the outer tub 4 is provided in the air trap 44.

FIG. 3 is a plan view of the operation unit 2. Operation part 2
Then, at the front edge thereof, a washing process setting key 21a for setting the washing process time (3 minutes, 6 minutes, 12 minutes) in order from the left side to the right direction, the water injection operation in the rinsing step and the rinsing frequency (once, once, Rinsing process setting key 22a
, Dehydration time in the dehydration process (1/2 minutes, 3 minutes, 6 minutes)
Dewatering process setting key 23a for setting the water level, water level setting key 24a for setting the water level (small, low, medium, high) in the outer tub 4, a washing course (silk) according to the type of laundry and the degree of dirt / Wool, blanket, ...) and a washing course setting key 25a for switching and setting, and a start / pause key 26 for instructing start and temporary stop of operation.

Information selected by these keys is lit behind each of the washing process setting key 21a, the rinsing process setting key 22a, the dehydration process setting key 23a, the water level setting key 24a and the washing course setting key 25a. Multiple to display
LED washing process setting LED group 21b, rinsing process setting
LED group 22b, dehydration process setting LED group 23b, water level setting LED group 2
4b and washing course setting LED group 25b are provided respectively. Further, between the washing course setting key 25a and the start / pause key 26, when an abnormal state of the washing machine such as a failure of a heater or the like occurs, the name of the machine in the abnormal state and its cause, etc. An abnormal state display window 27 is provided for displaying the content of the abnormal state of the above with a digital number predetermined for each content. The abnormal state display window 27
Consists of a set of LEDs, and is designed to display digital numbers according to the combination of LED displays.

Washing process setting key 21a, rinsing process setting key 22a, dehydration process setting key 23a, water level setting key 24a
Each setting of the washing course setting keys 25a can be changed each time it is operated, and the lighting display of each LED group is changed accordingly. By operating these keys, the user can drive the vehicle according to his or her preference.

Next, the structure of the control system of the washing machine will be described. FIG. 4 is a block diagram showing the configuration of the control system of the washing machine.

In the figure, reference numeral 100 is a microcomputer for controlling the operation of the washing machine. Microcomputer
100 has a first RAM 100a and a second RAM 100b for storing various display information to be displayed on the operation unit 2. The microcomputer 100 includes an input key circuit 101 composed of various operation keys as described above and a water level sensor.
Output signals from 91 and the water temperature sensor 92 are input. In the microcomputer 100, it is possible to determine the abnormal state of various devices that make up the washing machine based on the detection results of various sensors such as the water level sensor 91 and the water temperature sensor 92,
For example, when the water temperature detected by the water temperature sensor 92 becomes abnormally high, it can be determined that an abnormality has occurred in the electric heater.

A load drive circuit 106, which is a circuit for driving a plurality of devices, is connected to the microcomputer 100. Based on the signals input from the microcomputer 100 to the load drive circuit 106 as described above. And a control signal for driving the device is provided. Further, the microcomputer 100 includes a display control circuit for controlling the display of each LED and the abnormal state display window 27 as described above.
102 is connected, and the microcomputer 100 supplies the display control circuit 102 with the setting information of the washing course for lighting the respective LEDs and the information for digital display of the abnormal state display window 27.

The drive circuit 106 includes a power-off AC solenoid 110 for turning off the power switch 3, a water supply valve drive circuit 111 for driving the water supply solenoid valve, a drain valve drive circuit 112 for driving the drain solenoid valve 42, and a motor. A motor left rotation circuit 113 for rotating the motor 7 to the left, a motor right rotation circuit 114 for rotating the motor 7 to the right, and a heater drive circuit 115 for driving the electric heater are connected to the load drive circuit.
Each drive signal is given from 106.

The microcomputer 100 includes a power supply circuit 10
5, the power for its operation is supplied, and a reset circuit 107 for initializing the microcomputer 100 and a power supply circuit 105 are provided between the power supply circuit 105 and the microcomputer 100 separately from the power supply line. The frequency synchronization circuit 108 for determining the frequency of the power supplied from the microcomputer 100 and causing the microcomputer 100 to operate in synchronization with the frequency of the determination result is connected in parallel.

Electric power is supplied to the above-mentioned load drive circuit 106 from an outlet 200 connected to an AC power supply (not shown) via the power switch 3. A power switch operation detection circuit 109 for detecting the on / off state of the power switch 3 is connected to this power supply line, and the detection result of the power switch operation detection circuit 109 is given to the microcomputer 100. Further, the power supply circuit 105 described above is supplied with power from the outlet 200 without passing through the power switch 3.

In the washing machine constructed as described above, the washing step, the rinsing step and the dehydrating step are sequentially executed under the control of the microcomputer 100 based on the operation program. When an abnormal state of various devices such as the electric heater is detected based on the detection results of various sensors such as the water temperature sensor 92 during such operation, the abnormal state is displayed in the display control as described below. Is done.

FIG. 5 is a flow chart showing the control procedure of the display control. This control is done by the microcomputer 10
Done by 0. In the display control, first, it is determined whether or not the power switch 3 is in the on state (step S1). Next, only when it is determined that the power switch 3 is in the ON state, the microcomputer 100 displays the display content of the setting information relating to the operation, which is set by the operation content of the various keys provided in the operation unit 2. It is stored in the first RAM (step S2).

Next, the information stored in the first RAM 100a is
To the display control circuit 102, and by the display control circuit 102,
The information is output to various LEDs provided on the operation unit 2 and the abnormal state display window 27 (step S3).

Next, it is determined whether or not the power switch 3 is in the off state (step S4). If the power switch 3 is in the off state, the process proceeds to step S10 described later. on the other hand,
When the power switch 3 is not in the off state (the power switch 3
Is ON), it is determined whether or not the information indicating the abnormality content of the various devices is stored in the second RAM 100b (step S5).

When it is determined that the information indicating the abnormality content of the various devices is stored in the second RAM 100b, the process proceeds to step S12 described later. On the other hand, when it is determined that the information indicating the abnormality content of the various devices is not stored in the second RAM 100b, it is determined whether or not an abnormality has occurred in the various devices (step S6).

If it is determined in step S6 that no abnormality has occurred in the various devices, the process returns to step S3 and the above-described processing is repeated. On the other hand, when it is determined that an abnormality has occurred in the various devices, the content of the abnormality is reported in the second RA.
The data is stored in M 100b (step S7), the power-off AC solenoid 110 is operated, and the power switch 3 is turned off (step S8).

Next, it is determined whether or not the power switch 3 is in the off state (step S9), and the process proceeds to step S10 only when the power switch 3 is in the off state.

In step S10, the microcomputer
The output of the control signal from 100 to the load drive circuit 106 is cut off.
Then, after the processing in step S10, in step S11, the output to the various LEDs provided in the operation section 2 and the abnormal state display window 27 is stopped, and the process returns to the main routine concerning the operation control of the washing machine.

In step S5, the second RAM
If it is determined that the information indicating the abnormality content of the various devices is stored in 100b, the storage information of the second RAM 100b is transferred to the first RAM 100a, and the storage information of the first RAM 100a is stored in the second RA 100a.
The memory information of M 100b is rewritten (step S12).

Next, the washing process setting key 21a, the rinsing process setting key 22a, the dehydration process setting key 23a, and the water level setting key 24.
It is determined whether or not any of the keys a and the washing course setting key 25a has been operated (step S13).
If it is determined that the key is not operated, the process returns to step S3. Here, returning to step S3, step S3
Then, the information indicating the details of the abnormality of the various devices stored in the first RAM 100a is displayed in the abnormal state display window 27.

On the other hand, if it is determined in step S13 that the key has been operated, the stored information in the second RAM 100b is cleared (step S15), the process returns to step S2, and the above-described processing is repeated. Here, returning to step S2, the display contents at the time of normal operation are stored in the first RAM 100a, and the display contents are displayed on each LED of the operation unit 2 in step S3.

In the display control as described above, when no abnormal state occurs in the various devices during operation,
The contents set by the operation of the keys of the operation unit 2 are displayed on the LEDs of the operation unit 2. On the other hand, when an abnormal state occurs in the various devices, the abnormal contents are displayed in the second RAM 100b.
The stored abnormality content is displayed in the abnormal state display window 27 of the operation unit 2 from the second RAM 100b through the first RAM 100a.

When such an abnormal state occurs, the power switch 3 is turned off as shown in step S8,
When the operation of the washing machine is stopped and the power switch 3 is turned off in such a state, the display on the operation unit 2 is erased. When the power switch 3 is turned on again by the user after the stop due to the occurrence of such an abnormal state, the washing process setting key 21a, the rinsing process setting key 22a, the dehydration process setting key 23a, the water level setting key 24a and Washing course setting key 25
By operating any one of the keys a, the stored information in the second RAM 100b is cleared as shown in step S14, and the first RAM 100a has the contents displayed during normal operation in step S2. It is stored, and in step S3, the display contents during the normal operation are displayed. As a result, the abnormal display in the abnormal state display window 27 disappears.

As described above, when the washing machine is restarted after the operation is stopped due to an abnormal state, it is expected that there is a high probability that the abnormality-causing device is recovered by the inspection of the anomaly-generating device after the operation stop. Therefore, at this time, the abnormal display in the abnormal state display window 27 is temporarily erased and the operation is restarted. After the operation is restarted, if the abnormal device is not recovered, the abnormal condition display window 27 displays the abnormal condition again.

In this embodiment, when the power switch 3 is turned off and the power switch 3 is turned on again to restart the operation after the abnormal state occurs, the washing process setting key of the operation unit 2 is used. 21a, the rinse process setting key 22a, the dehydration process setting key 23a, the water level setting key 24a, and the washing course setting key 25a, when any one of the keys is operated, the stored information in the second RAM 100b is cleared. Although the display contents displayed during normal operation are restored, the present invention is not limited to this, and the display contents displayed during normal operation can be restored by restarting the operation by turning on the power switch 3. It may be performed after a lapse of a predetermined time.

[0037]

As described above in detail, in the display device according to the present invention, the information indicating the occurrence of the abnormal state is not displayed while the power supply to the electric equipment is cut off. It is possible to suppress unnecessary power consumption related to the display of information, and to prevent the user from feeling distrust while the electric device is stopped when an abnormal state occurs. Has an excellent effect.

[Brief description of drawings]

FIG. 1 is a perspective view of a washing machine to which a display device according to the present invention is applied.

FIG. 2 is a schematic vertical sectional view of a washing machine.

FIG. 3 is a plan view of an operation unit.

FIG. 4 is a block diagram showing a configuration of a control system of the washing machine.

FIG. 5 is a flowchart showing a control procedure of display control.

[Explanation of symbols]

 3 Power switch 27 Abnormal condition display window 92 Water temperature sensor 100 Microcomputer 100a 1st RAM 100b 2nd RAM 102 Display control circuit 109 Power switch operation detection circuit

Claims (1)

Claim: What is claimed is: 1. A display device, which is provided in an electric device and displays information indicating the occurrence of an abnormal condition when the electric device has an abnormal condition, the storage device storing the information. A means for detecting that power supply to the electric device is cut off, a means for prohibiting display of the information when the power supply is cut off by the means, and the power supply is restarted. And a means for displaying the information stored in the storage means.