JPS62243590A - Controller of 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] Industrial applications The present invention relates to a washing machine control device.

Conventional technology In recent years, as a method for rinsing the spinner tank of a washing machine, a method has become popular in which one cycle of (stopping the spinner and supplying water) is repeated several times, depending on the amount of laundry. By automatically setting the number of times of the rinsing cycle, efficient rinsing can be performed. Therefore, one method of inexpensively detecting the amount of laundry is a method of detecting the voltage of a driving capacitor due to fluctuations in the load applied to a capacitor-type induction motor (hereinafter referred to as a dehydration motor). This method makes a judgment based on the time it takes for the capacitor voltage to reach a certain level, depending on the load.

That is, if this time is short, the amount of load is determined to be small, and if this time is long, the amount of load is determined to be large.

Problems to be Solved by the Invention In general, the characteristics of capacitor voltage and dehydration time are as shown in Figure 4, with the load amount as a parameter, and it is true that the load amount and capacitor voltage reach a certain level. There is a correlation between time. However, even if the load is the same, for example, if the power supply voltage fluctuates as shown in FIG. 5, the initial capacitor voltage value V. Since the value of changes, the time it takes to reach a certain level changes, causing the problem that the correlation no longer holds true.

The present invention solves these problems by providing a load determination method that is not affected by changes in power supply voltage or variations in motor characteristics. An object of the present invention is to provide a washing machine control device that can perform efficient rinsing by setting the number of cycles, etc.

Means for Solving the Problems In order to achieve the above object, the washing machine control device of the present invention includes a condenser-type induction motor (dehydration motor) that rotates a dehydration tank, and a condenser at both ends of the condenser for driving this motor. A capacitor voltage detection means for detecting voltage, a timer means for measuring the time until the capacitor voltage value from the capacitor voltage detection means increases by a predetermined value or more from the capacitor voltage value at the start of dehydration, and a dehydration integrated stop.
The system is equipped with a control means that repeats the dewatering process several times as one cycle, and the control means determines the load amount from the value of the timer means, and controls the dehydration integrated stop and water supply according to this load amount. It is something.

For production With this configuration, the control means is the fluctuation of the power supply voltage.

Even if the capacitor voltage value at the start of dehydration changes due to variations in the characteristics of the dehydration motor, the value of the timer means remains almost constant. Depending on the amount, the dehydration stop-water supply cycle can be controlled.

Embodiment An embodiment of the present invention will be explained with reference to FIGS. 1 to 3. 1st
In the figure, 9, 10, and 11 are bidirectional thyristors,
In the dehydration tank rinsing (dehydration integrated stop-water supply) cycle, 9 is used to drive the water supply valve 8, 10 is used to drive the dehydration motor 1, and 11 is used to brake the dehydration motor 1. Here the bidirectional thyristor 9, 10.11
Resistors 12, 13, and 14 connected to the resistors 12, 13, and 14 limit the gate current that turns on each bidirectional thyristor. Reference numeral 2 denotes a capacitor voltage detection means, which detects the voltage across the driving capacitor 7 of the dehydration motor 1 during the dehydration step of the rinse cycle. 6 is a microcomputer, which includes an input section 6a for inputting the signal of the capacitor voltage detection means 2, bidirectional thyristors 8, 9 .
an output section eb that outputs an output signal to 10; a storage section ad that stores the capacitor voltage value and the dehydration tank rinsing sequence;
It has an arithmetic control section 6d that controls the input section 6a, the output section 6b, and the storage section 6d, respectively, and performs data comparison operations. Note that 15 is a commercial AC power source. Further, the microcomputer constitutes the control means 4 and timer means 2 shown in FIG.

Next, the operation of this embodiment will be explained with reference to FIG. When entering the first or second dehydration process of rinsing the dehydration tank, the microcomputer 8 drives the dehydration motor in step 21, and the next step At step 22, the voltage value ■c across the capacitor at the initial stage of startup is read, and this data is stored as the initial voltage value v0. Next step 23
Then, the timer counts, and in step 24, the capacitor voltage value vc reaches the above-mentioned V. Check whether it has increased to +10v or more■. +10) If y is smaller, step 2
Return to 3 and continue counting on the timer. When the VC becomes (Vo + 10) 7 or more, the process proceeds to step 25 and the timer stops counting.

Next, based on the measured value T of the timer, the microcomputer 6 determines the amount of load to be applied to the dewatering motor.

First, in step 26, it is determined whether the above-mentioned T is 20 seconds or more, and if T<20 seconds, the load amount is determined to be small in step 27, and the number of cycles of the above-mentioned (dehydration integrated stop-water supply) is increased 3 times. Set to . If it is 1220 seconds, step 28
Proceed to , and determine whether it is longer than 1 minute. In the case of 121 minutes, it is determined in step 29 that the load amount is large, and the number of cycles is set to five. 2o seconds T〈In case of 1 minute,
Proceeding to step 3o, the load amount is determined to be normal and the number of cycles is set to four.

According to the above embodiment, in detecting the degree of increase in the capacitor voltage of the dehydration motor, the capacitor voltage value (■) at the start of dehydration. The time T required for the time T to increase from a certain value or more is almost unaffected by fluctuations in the power supply voltage and variations in the characteristics of the dehydration motor, so the amount of load applied to the dehydration motor can be accurately determined, and the amount of load applied Since the number of cycles for rinsing the dehydration tank (dehydration integrated stop-water supply) is set accordingly, rinsing can be performed efficiently.

Effects of the Invention The present invention provides a capacitor-type induction motor that performs dehydration, a capacitor voltage detection means that detects the voltage across the driving capacitor, and a capacitor voltage detection means that detects a voltage across the drive capacitor, and a capacitor voltage value during dehydration that is higher than the capacitor voltage value at the start of dehydration. Since the device is provided with a timer means for measuring the time until the increase exceeds a certain value, and a control means for controlling the capacitor-type induction motor and the timer means, the data of the timer means is based on fluctuations in the power supply voltage and The amount of load applied to the dehydration motor can be accurately determined without being affected by variations in the characteristics of the dehydration motor. Further, by setting the number of dehydration tank rinsing cycles (dehydration integrated stop-water supply), etc. in accordance with the determined load amount, it is possible to achieve the effect that efficient rinsing can be performed automatically.

[Brief explanation of drawings]

FIG. 1 is a graph of suppressor voltage and spin-drying time of a washing machine in an embodiment of the present invention. 1... Capacitor m induction motor, 2...
... Capacitor voltage detection means, 3 ... Timer means, 4 ... Control means. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] A capacitor-type induction motor that rotates the dehydration tank, a capacitor voltage detection means that detects the voltage across the capacitor for driving this motor, and a capacitor voltage value from this capacitor voltage detection means that is higher than the capacitor voltage value at the start of dehydration. , a timer means for measuring the time until the increase exceeds a predetermined value, and a control means for repeating the dehydration process several times, with the dehydration-pause-supply dehydration process as one cycle, and the control device controls the value of the timer means. A washing machine control device that determines the amount of load applied to the condenser-type induction motor from the above, and sets the number of repetitions of the subsequent dewatering process or the time of each process of dehydration, pause, and water supply according to the load amount.