JPH0231797A - Brake operation of full automatic washing machine - Google Patents

Abstract

PURPOSE:To reduce noise at the time of completing intermediate dehydration by starting the feed water of a following 'rinsing' process before a brake is operated, at the time of completing the intermediate dehydration, and by operating th brake after the rotation of a busket is completely stopped. CONSTITUTION:In the process of drainage, by the operation of a pressure switch, through a time point when the drainage in an external tank 2 is completed to a certain extent, a bearing clutch device 10 is switched to dehydration from washing, and a busket 6 is rotated at a high speed, and the dehydration is processed. After a regulated time, electrification to a motor 7 is interrupted, but by an inertia force, the busket 6 is rotated. By the same regulated time as that of the working of a brake and the starting of feed water, an inertia rotation time is set, and the feed water is rotated. In this case, a drain valve is set in a closing state. The brake should be operated before the feed of water is completed and is switched to the agitation operation of rinsing, and the inertia rotation time for 1-2 minutes after starting the feed water can be set, and in a state that the busket 6 is completely stopped, the bearing clutch device 10 is switched to the washing from the dehydration and is switched to the process of the rinsing. When the rinsing is processed twice, then the process is completed by repeating.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a brake operation of a fully automatic washing machine, and particularly to brake control suitable for noise reduction.

[Conventional technology]

In conventional fully automatic washing machines, "wash".

It has a program that continuously performs each process of ``rinsing'' and ``dehydration''.
When rinsing is performed twice, it has been common to provide an intermediate dehydration step between "rinsing".

Related devices of this type include
No. 351 etc. are mentioned. [Problems to be Solved by the Invention] In the intermediate dewatering step, first, after the "washing" is completed, water is drained, and the basket is rotated at high speed by switching the clutch to perform dewatering. After a predetermined period of time, the motor is de-energized and the basket slows down due to inertia rotation, and the brake is applied to stop the rotation of the basket, after which water supply for ``rinsing'' is generally started.

In this type of program, since the laundry is in the basket, there is a large inertia force, and even if the motor is turned off, it takes nearly a minute for the basket to stop rotating, so when the brake is applied, the basket does not stop rotating. There was a problem that the operation noise was loud because there was no such thing. Furthermore, if the brake is operated after the rotation of the basket has stopped, there is a problem that the dewatering process takes longer and the total washing time also becomes longer.

An object of the present invention is to reduce the noise at the end of this intermediate dehydration.

[Means to solve the problem]

The above purpose is to start water supply for the next "rinsing" process at the end of intermediate dewatering and before operating the brake.

This is accomplished by applying the brakes after the basket has completely stopped rotating.

[Effect]

At the end of the intermediate dewatering process, the power to the motor is stopped, and the rotation of the basket slows down due to inertia, but after a specified period of time, the ``rinsing'' process begins and water supply begins. At this time,
Although the basket does not stop rotating, the water supply process accelerates the time it takes for the basket to stop. moreover,
The water supply process requires water of 30 to 40 α, so it takes more than 1 minute, and the brake operation time can be extended until just before the specified water level is reached.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

The outer tank 2 is supported from the upper end of the outer frame 1 by means of a suspension 4 via a spring 3 in an anti-vibration manner.

Furthermore, the outer tank 2 includes a basket 6 equipped with a stirring blade 5 in the center. A fluid balancer 15 is provided at the top of the basket 6, and salt water or the like is sealed inside the fluid balancer 15.

Furthermore, a reinforcing flange 16 is provided at the bottom of the basket 6.
is fixed with a screw. A bearing clutch device 10 to which a drive motor 7 is fixed is press-fitted into the bottom of the outer tank 2 . The hollow shaft 12 of the bearing clutch device 10 has a threaded portion 17 at its tip, and the flange 16 is connected to the shaft by a nut 18.
It is fixed and rotates as one. The rotation of the motor 7 is controlled by the M pulley 11. Belt 8. When washing is carried out by the bearing clutch device 10 via the stirring blade pulley 9, the information is transmitted to the stirring blade shaft 14 through the reduction gear 13, and during dehydration, it is transmitted to the hollow shaft 12.
are transmitted to rotate the basket 6 by 5 degrees of stirring blades.

Fig. 2 is an overall block diagram showing the configuration of the program control device in a fully automatic washing machine, which detects the program selection section 21 of switches for selecting the washing program, the water level in the washing tub, and the open/closed state of the lid of the washing machine. state detection unit 22.
Built-in several preset programs,
and an operation control section 23 for controlling the output load according to the input signal and executing the program operation. A power supply unit 24 that supplies power necessary for the operation of each part and generates a reference time signal. Load control circuit section 25 consisting of semiconductor switching circuits etc. that drive motors, water supply valves, drain valves, etc.
Display signal amplification unit 2 for driving display devices such as LEDs
6. Load section 27 consisting of a motor, water supply valve, drain valve, etc. It consists of an operation display section that displays operations.

To explain each process according to the program shown in Figure 3,
First, a water supply valve (not shown) opens and water supply starts.

When water is supplied to the outer tank to a specified level, a pressure switch (not shown) is activated, stopping the water supply and reversing the stirring blades to begin the washing process.

Next, after a specified period of time, the rotation of the stirring blade is stopped and the draining process begins. In the drainage process, due to the action of the pressure cast inch,
When the water in the outer tank 2 has been drained to some extent, the bearing clutch device 1flO is switched from washing to dewatering, and the basket 6 is rotated at high speed to perform the dewatering process.

After a predetermined time, the power to the motor 7 is cut off, but the basket 6 continues to rotate due to inertia. Conventional brakes work,
The inert rotation time is set for the same specified time as the water supply starts, and the water supply is rotated.

At this time, the drain valve (not shown) is closed.

The brake operation can be performed after water supply is completed and before moving on to the rinsing agitation operation, allowing for 1 to 2 minutes of inertia rotation after the start of water supply, and with the basket 6 completely stopped, the bearing clutch The device 10 is switched from dehydration to washing and moves to the "rinsing" process.

Then, when the "rinsing" process is performed twice, the process is completed by repeating the same process.

However, in the final dewatering process, the inertial rotation time when the motor is turned off is longer than during the intermediate dewatering process.

After the buzzer notifying the end of operation, the brakes are applied.

〔Effect of the invention〕

According to the present invention, during the dewatering process, the brake is operated after the basket has completely stopped, so the
In addition to reducing brake operation noise, the time from the motor energization stop at the end of spin-drying to the start of water supply for ``rinsing'' can be the same as before, so the total washing time is not long.

[Brief explanation of the drawing]

FIG. 1 shows a longitudinal section of a washing machine according to an embodiment of the present invention, FIG. 2 shows a block diagram of a control device, and FIG. 3 shows a program diagram. 6...Basket, 7...Motor.

Claims (1)

[Claims] 1. A washing and dehydration tank having a stirring blade at the bottom, an outer tank in which the washing and dehydration tank is rotatably installed, a support device that supports the outer tank in a vibration-proof manner within a main body, and the stirring blade. It consists of a drive device that drives a washing and dehydrating tank, and is used for washing, rinsing,
In a fully automatic washing machine having a program that continuously performs the washing process of dehydration, in order to stop the rotation of the washing and dehydration tank at the end of dehydration in the intermediate dehydration process from ``wash'' to ``rinsing'' and during ``rinsing''. A brake operation of a fully automatic washing machine characterized in that water supply for a "rinsing" process starts before a provided brake mechanism operates.