JPS63262185A - Washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention controls the execution of processes such as washing and rinsing by a washing operation control circuit composed of, for example, a microcomputer, and also controls the execution of processes such as washing and rinsing. This invention relates to a washing machine that detects the occurrence of an abnormality using a temperature switch.

(Prior Art) Conventionally, for example, in a dehydrating and dehydrating washing machine, as shown in FIG.
There is a device in which the execution of processes such as washing, rinsing, and dehydration is controlled by controlling the energization and disconnection of 04. In addition, in this washing machine, an abnormal temperature rise in the washing machine motor 104 is detected by a self-resetting attitude switch 105 (its installation state is shown in FIG. 4), and the starting capacitor of the washing machine motor 1.4 is It is designed to detect the occurrence of an abnormality such as a disconnection of the wire 104a, a failure of the power transmission system, or a locking of the stirring body. In this case, the temperature switch 105 is connected to the power supply 106
to the washing machine motor 104 (power switch 10
7 is connected to the switching element 102, 1.
03, and when an abnormal temperature rise is detected and activated (turned off), the washing machine motor 104 is cut off. In the past, a temperature fuse built into the washing machine motor was used to cut off the power to the washing motor when the temperature rose abnormally, but this meant that subsequent repairs were troublesome and the washing machine motor had to be replaced. Recently, this type of temperature switch has been mainly used.

(Problems to be Solved by the Invention) However, in the device that detects the abnormal temperature of the washing machine motor 104 by operating the temperature switch 105,
When the power supply path to the washing machine motor 104 is disconnected by the operation of the temperature switch 105 during the rinsing and spin-drying steps,
Since the washing operation control circuit 101 continuously executes the control operation, only the set process time is maintained without actually executing the washing process, rinsing process, or spin process (the washing machine motor 104 remains not driven). Then, the drain stroke in which the drain valve is energized and the water supply stroke in which the water supply valve is energized are executed, resulting in waste of power and water. Furthermore, since the temperature switch 105 mentioned above is reset when the temperature of the washing machine motor 104 decreases, for example, when performing inspection work with the power switch 107 turned on, the reset of the temperature switch 105 will cause the washing machine to restart. There was a risk that the motor 104 would suddenly start rotating.

The present invention has been made in view of the above circumstances, and its purpose is to stop the progress of the process at that point when the temperature switch detects an abnormality of 8 degrees in the washing machine motor and to reset the temperature switch. To provide a washing machine in which a washing machine motor is not energized even when the washing machine motor is energized.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a washing operation control circuit that controls the execution of processes such as washing and rinsing by controlling power on/off of a washing machine motor, and the washing machine. and a self-resetting type temperature switch that operates when the temperature of the motor reaches a predetermined temperature, and is configured to provide a temperature detection signal by the operation of the temperature switch to the washing operation control circuit, and the washing operation control circuit is characterized in that when the temperature detection signal is given, the control operation is stopped at that point and the washing machine motor is cut off regardless of the temperature switch.

(Function) If the washing machine motor rises to an abnormal temperature due to a disconnection of the starting capacitor, failure of the power transmission system, locking of the agitator, etc.
When the temperature reaches a predetermined temperature or higher, a temperature switch is activated.

A temperature detection signal generated by the operation of this temperature switch is given to the operation control circuit. The washing operation control circuit stops the progress of the stroke by stopping the control operation when this temperature detection signal is given, and at the same time, the washing machine motor is cut off regardless of the temperature switch, so that the temperature can be adjusted. Even if the switch is subsequently restored, the washing machine motor will not start rotating.

(Example) An example of the present invention will be described below with reference to FIGS. 1 and 2.

is a transformer that steps down the above power supply, and this transformer 3
On the secondary side of the constant voltage power supply circuit 4. Waveform shaping circuit 5. An initialization circuit 6 and a washing operation control circuit 7 are provided. The washing operation control circuit 7 includes a microcomputer 8
．． Clock signal generation circuit 9, input interface circuit 10. It has an output interface 11, and the microcomputer 8 stores in advance each process such as water supply, washing, drainage, dehydration, water supply, rinsing, drainage, and final dehydration, and a washing course to be executed and controlled according to a predetermined program. . The output interface circuit 11 controls on/off switching cables 12 to 16 made of triacs, and the switching element 12 controls the power supply 1
Similarly, the switching cord 13 is interposed in a power supply path to an electromagnetically driven water supply valve 18 via the power switch 2, and the switching cord 14 is interposed in a power supply path to an electromagnetically driven drain valve 18. The switching elements 15 and 16 are interposed in the power supply path to the magnet 19 for charging softening agent, etc., and the switching elements 15 and 16 are connected to the power supply path to the forward rotation terminal and the reverse rotation terminal, respectively, of the washing machine motor 20 consisting of a capacitor motor. is interposed in the power supply path. Note that 21 is a notification circuit consisting of, for example, an electronic buzzer.

In this FIG. 1 and FIG. 2 showing the operation panel, 22
．． 23 is a course selection/start switch for specifying a "standard" course or a "saving" course for the washing course executed by the washing operation control circuit 7; 24 is a "standard"course;
25 is a water flow selection switch for selecting the strength of water flow in each step of washing and rinsing;
6 is a temporary stop/restart switch, and the on signal generated by turning on each of these switches 22 to 26 is sent to the wash 27.
The input interface circuit 10 of the operating control circuit 7 is manually operated. Further, 27 to 35 are indicators made of light emitting diodes, in particular, the indicator 29 is for displaying the "washing" process, the display 30 is for displaying the "rinsing" process,
The display 31 is for displaying the "dehydration" process, and the display 32 is for displaying the "careful washing" process, and these also serve as an abnormality display device. The "careful washing" mentioned in Section 1 is a washing process in which, for example, a strong water stream is used for a relatively long set time.

Now, 36 shown in FIG. 1 is a temperature switch, which is provided so as to be able to detect the temperature of the washing machine motor 20. This temperature switch 36 is of a normally closed type, opens when a predetermined temperature is detected, and returns to its normal state when the temperature falls.

Both ends of this temperature switch 36 are connected to the input interface 10 of the washing operation control circuit 7, so that a temperature detection signal Sk generated by the opening operation of the temperature switch 36 is provided to the washing operation control circuit 7. ing.

The above-mentioned washing operation control circuit 7 performs the following control operations based on the software configuration.

For example, when the "standard" course is selected by operating the course selection switch 22 and the operation is started, water supply, washing, draining, spin-drying, water supply, and rinsing are performed.

The drainage and final dehydration steps are controlled to be executed in sequence. The control details for each process are as follows. However, the execution time of the final dehydration process is set to be longer than that of the previous dehydration process.

(1) Water supply stroke: The switching element 12 is turned on, the water supply valve 17 is opened, a water supply stroke is executed, and the switching element 12 is turned off based on a water level detection signal from a water level switch (not shown).

(II) Washing process: The switching elements 15 and 16 are turned on alternately after a period of off time, and a stirring body (not shown) is rotated in forward and reverse directions to carry out the washing process.

At the same time, the execution time is counted, and when a predetermined time is reached, both switching elements 15 and 16 are turned off to complete the washing process.

(II[) Drainage stroke: The switching element 13 is turned on and the drain valve 18 is opened for a predetermined time, for example, to execute the drainage stroke.

(IV) Dewatering process...The switching element 13 is turned on, the drain valve 18 is opened, and the switching cord 1 is turned on.
5 is turned on to rotate the rotary tank in one direction at high speed, thereby executing a dewatering operation, and when the execution time has elapsed for a predetermined period of time, the switching cable 15 is turned off and the dewatering process is completed.

(V) Rinsing step: After turning on the switching cable 12, the switching elements 15 and 16 are controlled on and off in the same manner as described in (n) above, and the switching element 14 is turned on at an appropriate time. and add fabric softener.

Therefore, when the washing machine motor 20 becomes overheated due to a disconnection of the capacitor 20a, a failure of the power transmission system, a locking of the agitator, etc. during the washing process, rinsing process, or dehydration process, the temperature switch 36 is activated. detects the abnormal temperature rise, opens the door, and provides a temperature detection signal Sk to the washing operation control circuit 7. Upon receiving this temperature detection signal Sk, the washing operation control circuit 7 stops the process control operation, that is, stops the progress of the process, and at the same time,
Switching elements 15 and 16 are turned off to cut off power to washing machine motor 20 regardless of temperature switch 36. Furthermore, the display corresponding to the process that was being executed at this point (
(any one of the displays 29 to 32) is driven to blink. As a result, from the point in time when the temperature detection signal S k is manually operated, neither the water supply process nor the drain process is executed, thereby eliminating waste of power and water. Furthermore, even if the temperature of the washing machine motor 20 drops due to natural heat radiation and the temperature switch returns to the open state, the temperature switch 36
There is no intervening power supply path to switching element 1, and switching element 1
5.16 is in the off state and the washing machine motor 20 remains cut off, so even if inspection work is performed with the power switch 2 turned on, the washing machine motor may suddenly start rotating. No, it's safe. Furthermore, since any one of the indicators 29 to 32 is driven to blink, the user can be notified of the occurrence of abnormal overheating of the washing machine motor 20, and inspection and repair can be carried out quickly.

[Effects of the Invention] As is clear from the above description, when the temperature switch detects an abnormal temperature of the washing machine motor and operates, the present invention can stop the progress of the process at that point, and the temperature switch Even when the washing machine motor returns to normal operation, the washing machine motor can be kept in a power-off state, and as a result, there is an excellent effect that power and water waste can be eliminated and safety can be improved.

[Brief explanation of the drawing]

1 and 2 show one embodiment of the present invention, in which FIG. 1 is a block diagram of the electrical configuration, FIG. 2 is a front view of the operation panel, and FIGS. The figures show a conventional example; FIG. 3 is a diagram schematically showing a drive circuit of a washing machine motor, and FIG. 4 is a partial perspective view of the washing machine motor showing how a temperature switch is installed. In the figure, 7 is a washing operation control circuit, 15 and 16 are switching elements, 20 is a washing machine motor, and 29 to 32 are indicators (
(abnormality display device), 36 is a temperature switch.

Claims (1)

[Scope of Claims] 1. A washing operation control circuit that controls the execution of processes such as washing and rinsing by controlling power on and off of a washing machine motor, etc., and a washing operation control circuit that controls the execution of processes such as washing and rinsing, and when the temperature of the washing machine motor reaches a predetermined temperature. and a self-returning type switch that operates once, and is configured to provide a temperature detection signal by the operation of the temperature switch to the washing operation control circuit, and the washing operation control circuit is configured to control the washing operation control circuit when the temperature detection signal is applied. A washing machine characterized in that the control operation is stopped at that point and the washing machine motor is cut off regardless of the temperature switch. 2. The washing machine according to claim 1, wherein the washing operation control circuit is configured to drive an abnormality display device when a temperature detection signal is given.