JPS62102798A - Fully automatic washing machine dehydration drive system - 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 [Field of Application of the Invention] The present invention relates to a dewatering drive system for a fully automatic washing machine.

[Background of the invention]

Conventional fully automatic washing machines have two types of controls for both microcomputer control and X-force control: one for natural drainage and one for forced drainage using a pump, and each control method cannot be shared. Ta.

In particular, when using a forced drainage system with a pump, unless the washing water or rinsing water in the outer tank is completely drained before proceeding to the dehydration process, the rotation of the inner tank during dewatering will cause the dewatered water to be removed. The problem is that the liquid causes a phenomenon called foaming, making dehydration impossible.

As mentioned above, using only the drainage method has the disadvantage that control parts cannot be shared, resulting in high costs and a significant drop in production efficiency.

[Purpose of the invention]

The purpose of the present invention is to enable both a natural drainage type fully automatic washing machine and a forced drainage type fully automatic washing machine to be handled by one control, and the microcomputer has a pressure switch for water level detection that can be reset. To provide a control system that allows switching between natural drainage and forced drainage using a switch on an external board, by setting a program to start a dewatering process after a few seconds and a program to start after a few minutes. It is in.

[Summary of the invention]

In the present invention, as described in the object of the invention above, a natural drainage program and a forced drainage program are set in one microcomputer and provided on an external board. A switch allows you to change the dewatering drive method depending on the drainage method.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

First, the description will be made based on FIG. 1. FIG. 1 is a longitudinal sectional view of a fully automatic moving washing machine.

An outer tank 3 is suspended inside an outer frame 1 by four hanging rods 2. An inner tank 4 for washing and dehydrating the clothes is provided inside the outer tank 3, and a rotary blade for moving the clothes is provided at the center bottom of the inner tank 4.

This rotary blade transmits rotation from a motor pulley 9 to a pulley 11 via a U-belt 10 by the power of a motor 8.

During dewatering, the inner tub 4 is rotated by operating the clutch 12, and when washing, the rotor blades are rotated.

In addition, when washing, the amount of water supplied to the inner tank is determined by transmitting the air pressure of the air trap 6 to the pressure switch 5 via the tube 7, so that a constant amount of water is supplied, and when draining, the valve 13 is turned on. By opening and closing, the washing and rinsing water in the outer tank 3 is drained out of the machine through the drain hose 14.

At this time, in the case of natural drainage, drain valve 13 is used, and in the case of forced drainage with a pump, drain valve 1 is used.
3 is replaced with a pump to drain water.

In Fig. 2, the operating principle of the present invention is shown as a block diagram. AC 100V is inputted from the power supply, converted to DC 5V by the transformer and rectifier circuit 15, and then transferred to the microcomputer. 16.

The MPU receives H and L signals from the pressure switch 5, and performs the set washing, draining, and dehydrating processes. It detects the presence or absence of water in the outer tank and outputs a signal to the drive circuit according to a program set in the MPU to operate the motor 8 and the like.

Switch 1 (SWI) to switch 4 (SW4) are external setting keys for the washing process, and any washing process can be selected by inputting SW1 to SW4.

Switch 18 (SW5) is a switch for changing the program when used in a natural drainage type washing machine and a forced drainage type washing machine with a pump.

Now, when switch 1 (SWI) is turned on, the time cycle shown in Fig. 4 is set and the washing machine starts operating. When washing starts, the water supply valve 5 operates, and when the water becomes full, the pressure switch is switched and the motor 8 is energized to stir the water.

After 15 minutes have elapsed, the motor 8 is set to 0FFL, and as shown in the flowchart of FIG. 3, since the answer is 'YES' to drain water, the pump or drain valve is operated. Drainage operation continues until the pressure gas inch is reset.

The pressure switch is reset (water enters the outer tank 3 from the bottom)
~80mm remaining) then YES on the flowchart.
Proceed to S if you are using a natural drainage type washing machine.
Since W5 is turned on in advance, the H level is input to the @ terminal of the MPU, and the flowchart goes as a solid line with YES, and dewatering starts 0 to 20 seconds after the pressure switch is reset, so dewatering is performed while leaving water in the outer tank. This makes it possible to create a washing machine with good starting characteristics that will start even if there is a slight imbalance. In addition, in the case of a washer with a forced drainage method (with a pump), SW5 is turned off in advance, so an L level signal is input to the @ terminal of the MPU, and the flowchart proceeds as shown by the broken line, 1 to 2 minutes after the pressure switch is reset. Since dehydration starts later, dehydration starts after the water in the outer tank 3 is completely drained, and it is possible to solve the problem of foaming development that occurs when water containing detergent is stirred.

As described above, in the present invention, two types of dewatering drive programs are set in the microcomputer, and by setting SW5゜1.8 to either ON or OFF in advance, an appropriate program according to the drainage method can be selected. It is a matter of choice;
A single microcomputer can be used for either the natural drainage method or the forced drainage method, which has a great effect on sharing the microcomputer and improving productivity.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a fully automatic washing machine, FIG. 2 is a block circuit diagram of the present invention, FIG. 3 is a flowchart, and FIG. 4 is an operation process chart of the present invention. 5...Pressure switch, 16...Microcomputer, 18...
・Selector switch.

Claims (1)

[Claims] 1. In fully automatic washing machines with natural drainage method and forced drainage method using a pump, when the pressure switch that detects the water level is reset in the case of the natural drainage method, the water level will disappear within a few seconds (0 to 5 seconds).
In the case of forced drainage with a pump, two programs are programmed into the microcomputer that will proceed to the dewatering process several minutes (0.5 to 2 minutes) after the pressure switch is reset. The feature is that one of the two programs can be executed by setting the circuit on the board in advance so that the input of the microcontroller's terminal changes from "H" level to "L" level. A dehydrating drive system for washing machines.