JPS6343696A - Control apparatus of washing machine - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention automatically detects the amount of load applied to a condenser type induction motor, that is, the amount of cloth, and detects the strength of the water flow of a washing machine.
The present invention relates to a washing machine control device that automatically controls rinsing time, number of rinsing cycles, spin-drying time, etc.

BACKGROUND OF THE INVENTION A conventional washing machine control device that detects the amount of cloth and controls the washing machine, as shown in Japanese Unexamined Patent Publication No. 156491/1983, uses a state in which a small amount of water is supplied before regular water supply. Alternatively, when the capacitor type induction motor is continuously energized during dehydration, etc., the terminal voltage of the capacitor type induction motor is detected, and the amount of cloth is determined based on the rise time of the voltage.

Problems to be Solved by the Invention However, with the conventional configuration, for example, when a condenser-type induction motor is continuously energized to detect the amount of cloth with a small amount of water being supplied before the regular water supply, it is difficult to detect the amount of cloth during the regular washing process. Previously, there was a problem that an extra process was required, and the water supply time and load detection time were longer than the normal time. In addition, when detecting the amount of cloth during spin-drying, there is a problem in that the detected amount of cloth can only be used to set the spin-drying time.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a washing machine control device that does not require an extra step of detecting the amount of cloth and can also use the amount of cloth detection data in processes other than the dehydration step. .

Means for Solving the Problems In order to achieve the above object, the washing machine control device of the present invention provides a washing machine control device that controls when the condenser type induction motor is repeatedly controlled to turn ON and OFF during intermittent dehydration after the end of the washing process. A load amount detection means is provided to determine the amount of load applied to the condenser type induction motor only when the motor 1 means is turned on, and the strength of water flow, rinsing time, number of rinsing times, dehydration time, etc. are controlled by the detection of this load amount detection means. This configuration includes a circuit.

Operation With the above configuration, the load amount can be detected during the existing intermittent dehydration process without providing an extra process, and moreover, automatic operation can be performed based on the load amount detected in the rinsing process and below.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the accompanying drawings. 1st
In the figure, 1 is a capacitor, which is connected between the windings of a capacitor-type induction motor M. A condenser-type induction motor is used in a washing and dehydrating tank (not shown) into which laundry is placed.
, or drive a pulsator placed at the bottom of this tank. Further, the capacitor type induction motor M is connected to an AC power source 1 via a motor drive means 2 made of a switching semiconductor. Voltage detection means 3 detects the voltage across the capacitor 1 only when the motor drive means 2 is turned on.
is provided. The output of the voltage detection means 3 is transmitted to the timer means 4 via the control means 6. This timer means 4 measures the time from when the motor and drive means 2 are first turned on until the voltage across the capacitor 1 reaches a predetermined value.

The time measured by the timer means 4 is transmitted to the load amount detection means 5 via the control means 6, and the amount of load applied to the capacitor-type servo motor M is determined.

The control means 6 controls the entire process and energizes the induction motor M via the motor drive means 2.

The washing machine control device having the above configuration will be explained with reference to the flowchart shown in FIG. After the washing process is completed, a rinsing process begins. First, after washing is finished, drain the detergent-containing water remaining in the washing tub.

Further, in order to scatter the detergent-containing water contained in the clothes by centrifugal force, the condenser type induction motor M is rotated at high speed by the motor driving means 2. At this time, in order to prevent the clothes in the washing tub from becoming unbalanced, the motor drive means 2 is a condenser type induction motor M that is turned ON periodically.
, OFF is controlled repeatedly. Such a dehydration method is hereinafter referred to as intermittent dehydration. Figure 2 shows how the voltage across the capacitor 1 changes over time after the intermittent dehydration starts. Here, V in FIG. is the voltage across the capacitor 1 immediately after the start of intermittent dehydration, and T is the time required for the voltage across the capacitor 1 to increase by a constant value ① from immediately after the start of intermittent dehydration until it reaches VO+V.

■ Immediately after the start of intermittent dehydration, the voltage detection means 3 detects ■. At the same time, the timer of the timer means 4 is started to start counting the time.

Thereafter, the voltage detection means 3 measures the voltage V across the capacitor 1 only when the capacitor type induction motor M is ON, and the data is transferred to the load amount detection means 6 each time. Here V≧■. It is determined whether +va is established, and if V≧V O+ V4 is not established, the process returns to the control routine for the capacitor type induction motor M.

If V≧Vo+V holds true, the timer of the timer means 4 is stopped and the courses are classified into three courses depending on the size of the counted time T. That is, if Q x T x tl, the load amount is considered to be small, and subsequent processes are set to course A and controlled. Similarly, if t1≦T<t2, the load amount is regarded as medium and course B is set, and if t2≦T, the load amount is regarded as medium and course C is set. Here 1.
．． 12 is a predetermined value, and the set course is, for example, the course shown in the table below. Based on this data, the control means 6 controls the motor and drive means in the subsequent rinsing process and dehydration process. This is to control the second class.

Table In this example, the load amount is detected during intermittent dehydration at the beginning of the rinsing process, and the method is applied to control the water flow strength, rinsing time, number of rinses, and dehydration time in three courses in the subsequent steps. However, it can be applied to all processes from the end of washing to the end of dehydration.

Effects of the Invention As described above, according to the present invention, the load amount, that is, the amount of laundry can be detected in the existing process without the need to provide an extra process, and moreover, it is possible to detect the amount of laundry in the rinsing process or below. The strength of the water flow, rinsing time, number of rinses, dehydration time, etc. can be automatically controlled according to the amount of water.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a washing machine control device according to an embodiment of the present invention, Fig. 2 is a graph showing the change over time in the voltage across the capacitor at the start of the same capacitor-type induction motor, and Fig. 3 is the same control device. 3 is a flowchart showing control of the device. M... Capacitor u induction motor, 1...
... Capacitor, 2 ... Motor drive means, 3
... Voltage detection means, 4 ... Timer means, 6 ... Load amount detection means, 6 ... Control means. Name of agent: Patent attorney Toshio Nakao and one other person
- Conte 1 si "wa" -? -Motor input Fig. 1 M-Koshide service 11 port motor Fig. 2 Motor no.

Claims (1)

[Claims] A motor driving means for controlling ON/OFF of energization of a capacitor-type induction motor, a voltage detection means for detecting the voltage across the capacitor, a timer means for detecting a time change in the voltage, and a time change in the voltage. load detection means for determining the load applied to the condenser type induction motor only when the motor drive means is turned on; and a control means for controlling the entire system; A washing machine control device that controls water flow strength, rinsing time, number of rinses, spin-drying time, etc. based on the load detected by a detection means.