JPS62155896A - Dehydration operation 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 application field] The present invention relates to a dehydrating operation method for a washing machine.

[Conventional technology]

First, to explain the overall structure of a washing machine, one example of a washing machine is a fully automatic agitation type, referring to Figure 2. There is a vertically elongated wall around the circumference of the center.
3) is an agitator provided radially; (4) is a dehydration tank in which the agitator (1) is placed in the center and a through hole (5) is provided in the side wall; A balancer (6) is formed. (7) is the dehydration tank (4
) is provided on the outside of the tank, and although not shown, is provided with a drain port to which a drain hose is connected.

In the figure (8) is the motor, which is connected to the pulley (9),
It is connected to a rotation transmission section (12) via a deceleration transmission mechanism of a V-belt (10) and a pulley (11). This rotation transmission part (12) has a double drive shaft (12a) (12b) that is switched by a honey clutch mechanism (13),
The outer drive shaft (12a) is fed to the dehydration tank (4), and the inner drive shaft (12b) is fed to the agitator (1).

Although not shown, all of these mechanisms are housed inside the exterior via vibration isolating means, and the upper part of this exterior is equipped with a control device using a microcomputer and an operation section containing operation switches. There is. This control device receives the output from a local detector such as water level detection, and the output from the control device is connected to the drive circuit of the motor (8), the valve control circuit for water supply valves, drain valves, etc., and other parts. be introduced.

In this way, the operation follows the standard washing process as shown in Figure 4. In the washing process, the items to be washed, water, and detergent are placed in the dehydration tank (4), and the power switch is turned on. When it is inserted, the motor (8) rotates forward and reverse alternately, and the agitator (1) also rotates accordingly. When the timer in the control device performs an operation that takes a certain amount of time, water is drained and the washing process is completed. Next, when the dehydration process begins,
The honey clutch mechanism (13) switches and the drive shaft (12b
), the drive shaft (12a) begins to rotate together with the motor (8), and the motor (8) continuously rotates in one direction only.
) also rotates continuously, but conventionally, the rotation of the dehydration tank has a constant dehydration time TO as shown in the fourth figure, so when there are few items to be washed, the startup time t1 until reaching high speed rotation is short. Therefore, the high-speed rotation time T1 is reduced accordingly.
becomes longer. However, on the contrary, when there are many items to be washed, the startup time T2 becomes longer and the high speed rotation time T2 becomes correspondingly shorter.

Although the startup time varies depending on the amount of items to be washed as shown in Figure 4, since the dehydration time including the startup time was fixed, the high-speed rotation may vary depending on the amount of items to be washed. As the time changes, the dehydration rate differs,
There was a risk of excessive dehydration or insufficient dehydration.

The purpose of the present invention is to eliminate the disadvantages of the conventional example, and to eliminate the need for washing (
To provide a dewatering operation method capable of automatically setting a water cutoff time commensurate with the amount of material and preventing dehydration failure.

[Means for solving problems]

In order to achieve the above object, the present invention provides a means for detecting the rotation speed of the motor, and uses the point in time when the detection means detects that the rotation of the dehydration tank has reached a predetermined high speed rotation speed as the starting point. The main idea is that the dewatering operation time due to high-speed rotation can be utilized.

[Effect]

According to the present invention, the rotation speed of the motor is detected by the detection means during dehydration operation, and when the rotation speed gradually increases at the start of the dehydration process and it is detected that the rotation of the dehydration tank has reached a predetermined high speed rotation. Based on this point, the dewatering operation time using high-speed rotation is automatically set, and the same high-speed rotation time can be obtained regardless of the length of the startup time.

〔Example〕

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

FIG. 1 is an operating curve diagram according to an embodiment of the dewatering operation method of the present invention, and since the configuration of the washing machine used in the method of the present invention is the same as that already explained with reference to FIG. 2, detailed explanation here will be omitted. Omitted.

The washing machine used in the method of the present invention also has a motor (8) coupled to the dehydration tank (4) via a rotation transmission part (12), and this motor (8) has a rotation speed detection means for detecting the rotation speed. (14) was attached.

As this rotation speed detection means (14), a speed generator using a power generating mechanism was used, but as another method, a rotary plate having a detection hole was attached to the shaft of the motor (8), and this and a light emitting part, It is also conceivable to combine an angle detector with a light receiving section.

Then, the detection signal from this rotation speed detection means (14) is introduced into a control device into which outputs from the above-mentioned water level detection and other detectors are introduced. Set the dehydration time to a constant value in advance.

In this way, following the same washing process as before, wash,
As the drainage process progresses to the dewatering process, the motor (8)
starts continuous rotation in one direction.

The so-called startup time until high speed rotation is reached varies depending on the amount of laundry to be washed, as shown in Figure 1, and when there is no load, high speed rotation is reached in a very short time (tl) as shown by the broken line ■. , When there is a large amount of items to be washed, use the solid line■
It takes a long time to reach high speed rotation.

In the method of the present invention, rotation speed detection means (such as a speed generator) (
14) detects the rotation speed of the motor (8), inputs its output to the control device, and detects the point in time when high speed rotation is reached.

Then, starting from this point, dewatering operation is performed by high-speed rotation for a predetermined period of time.

The dewatering process is carried out in the same manner in the final dehydrating process, and in addition to the one-tank washing machine mentioned above, it can also be applied to other types of washing machines such as two-tank washing machines and whirlpool washing machines. It can be used.

〔Effect of the invention〕

As described above, the dehydration operation method of the washing machine of the present invention is as follows:
Even if the start-up time is short or long depending on the amount of items to be washed, the high-speed rotation ensures a certain amount of dehydration time, so there is no need to waste the dehydration time or cause wrinkles on the items to be washed. On the other hand, it is also possible to prevent insufficient dehydration due to short dehydration time.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the operation according to an embodiment of the dehydration operation method of a washing machine according to the method of the present invention, Fig. 2 is a longitudinal sectional front view of the main parts showing an example of the washing machine used in the method of the present invention, and Fig. 3 shows the washing process. The explanatory diagram, FIG. 4, is an operation explanatory diagram showing a conventional dewatering operation method. (1)...Agitator (2)...Through hole (3
)...Agitation blade (4)...Dehydration tank (5)
・・Through hole (6)・・Balancer (7)・
・・Water tank (8)・・Motor (9)・・・
・Pulley (10)...■ Heald (11)・
... Pulley (12) ... Rotation transmission part (12
a) (12b)...Drive section (13)...
Spring clutch mechanism (14)...Rotational speed detection means agent Patent attorney Masuo Ono 1st illustration. Figure 2

Claims (1)

[Claims] The motor is provided with means for detecting its rotation speed, and the dehydration operation time by high-speed rotation is set based on the time when the detection means detects that the rotation of the dehydration tank has reached a predetermined high speed rotation speed. A dehydrating operation method for a washing machine featuring the following.