JPS6198286A - Operation of washer - 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 applies to washing processes, dehydration processes, and rinsing processes.

This relates to a washing machine that can continuously and automatically carry out all processes, including the dewatering process.

[Background of the invention]

This type of washing machine has the disadvantage that it generates more vibration during spin-drying compared to a so-called two-tub type washing machine that has a dedicated 4M spin-drying mechanism.

[Purpose of the invention]

The present invention addresses the above-mentioned problems and suppresses the occurrence of unbalanced vibrations during spin-drying, and also detects abnormal vibrations during spin-drying and sensors that detect unevenness of the fabric that causes unbalance. It is intended to also be used to detect when the lid is opened.

[Summary of the invention]

Unbalanced vibrations during spin-drying are caused by the laundry being placed in the washing and spin-drying tank being lopsided.

This bias does not always occur. When the washing agitator blades stir the laundry, the laundry may become uneven or disappear. While the laundry is being stirred, the vibrations of the washing and dehydrating tub and the water tank also change.

It has been confirmed that when there is unevenness, the vibration is large, and when there is no unevenness, the vibration is small. Therefore, near the end of washing or rinsing, the vibration detection sensor detects the place where the vibration is small. to stop the stirring operation. In this way, by draining and dehydrating the laundry in a place where the laundry is not tilted to one side, unbalanced vibrations during dewatering can be suppressed to a small level. In addition, when the laundry spin-drying tub causes abnormal vibrations during spin-drying, or when the lid of the washing machine is fully opened during spin-drying, the sensor detects this and stops the spin-dry rotation.

[Embodiments of the invention]

An embodiment of the present invention will be described in detail below based on the drawings. Figure 1 shows a washing machine vertically facing Vr.
l is the outer frame. A support 2 is provided at the F section of the outer frame 1. The top cover 3 is attached to the upper part of the outer frame l so as to cover the outer frame l. A lid 5 is provided to cover the laundry inlet 4'5r of the top cover 3. A control circuit 6 is provided in a panel portion of the top cover 3. Switch section 7 for operating this control circuit 6 and for external display
) is provided on the surface of the panel section.

, 1 9 The water tank 8 is placed inside the outer frame l. This water tank 8 is for storing washing water. At the bottom of the water tank 8, there is a motor 9, a clutch and a transmission a-? It has a drive section 10 consisting of a brake and the like. A belt 13 is installed between the motor-side pulley 11 and the drive section pulley 12, and the rotation of the motor 9 is transmitted to the drive section 10.

A washing and dehydrating tank 15 of an agitating blade 14 is attached to a rotating shaft protruding upward from the drive unit 10. Laundry dehydration tank 15
is placed inside the water tank 8 and rotates during dehydration. Stirring blade 1
4 is placed in the washing and dehydrating tank 15 and rotates during washing. During dewatering, it rotates together with the washing and dehydrating tub 15. Stirring blade 15
Although this type rotates forward and reverse with short cycles, a pulsator may also be used.

The washing and dehydrating tank 15 has a balance ring 16 on the top and a dehydrating hole 17 formed in the tank wall.

A water tank 8 having a washing and dewatering tank 15, an agitating blade, a motor 9, and a drive unit 10 is elastically suspended from the outer frame 1. That is, one water tank 8 is supported by four hanging rods 18 suspended from the four corners of the outer frame via anti-vibration springs 19.
A sensor for detecting the amplitude of vibration 1 is provided inside the upper part of the outer frame 1 so as to face the outer periphery of the water tank 8.

The tip of the operating rod 21 of this sensor 20 faces the outer periphery of the water tank 8 with a cap.

The above is an overview of the washing machine. Next, the configuration of the control circuit, which is the main part of the present invention, will be explained based on FIG. 2.

The processing circuit 22 forms the main part of the control circuit, and is constructed using a microcomputer or the like.

A power supply circuit 23 , a comparison circuit 24 , a selection circuit 25 , a display circuit 26 , and a drive circuit 27 are connected to the processing circuit 22 . The detection circuit 28 is connected to the comparison circuit 24 and also to the sensor 20 for amplitude detection. The water supply magnet 29, motor 9, and drainage magnet 30 are connected to a drive circuit 27 and a power source.

Note that the sensor 20 uses, for example, a differential transformer, a magnetoresistive element, an optical element, or the like. This sensor 2
0, the output is linear as shown in FIG. That is, as shown in FIG. 1, vibrations of the water tank 8 are output from the sensor 20 when the operating rod 21 moves from side to side.

FIGS. 4 to 7 show the operation of the washing machine using the outputs of the sensors. The driving operation will be explained based on these figures. First, in Fig. 4, at the start of washing v'J
tends to produce large output. This is because it is relatively easy for the laundry to be agitated by the agitating blades 14 to become agitated.

As the washing process progresses, the laundry items become more familiar and as the laundry items are uniformly distributed in the washing/dehydration tank 15, the vibration tends to become smaller. Sometimes it becomes uneven and vibrates greatly, but it quickly returns to small vibrations. In this way, the washing process ends, and near the end, the washing operation is stopped when low vibrations are detected as shown in A. Since the laundry items are not lopsided, unbalanced vibrations do not occur even when the washing water is drained and the washing/dehydration tub 15 is rotated. This allows rapid dehydration.

The output amplitude shown in FIG. 4 is obtained when the agitation gt4 is operated in a short period of forward and reverse rotation of l/lo for several seconds. Stirring R1
The forward/reverse cycle of 4 does not match the amplitude cycle of the output tn,
This is because the water tank 8 is elastically supported by the hanging rod 18, so that the period is longer than the forward and reverse rotation period of the stirring J'K14.

Now, as the washing and dehydrating tank 15 rotates for dewatering, the output from the sensor 20 as shown in FIG. 5 is output. The reason why the output decreases as the rotation progresses is because the weight of the laundry decreases due to dehydration, and vibrations decrease.

If dehydration starts for some reason and a large output as shown in B in Figure 6 is produced, the vibration will be large and dangerous. At this time, the operation of the motor 9 is immediately stopped. Fill the washing and dehydrating tank again with water, turn the agitation blade 14, and press A in Figure 4.
Drain the water from the affected areas and restart the dewatering operation.

FIG. 7 shows the output when the lid 5 is opened during dewatering, and the structure is such that when the lid 5 is opened, the operating rod 21 is moved and output B is output. The operation of the moseter 9 is immediately stopped.

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A single sensor 20 can determine whether the dehydration is complete, abnormal vibration detection during dehydration, and detection of the opening of the lid 5 during dehydration.

FIG. 8 is a flowchart summarizing all the operating steps of the washing machine employing the present invention. The vertical flow on the left shows an example of smooth progress from the anti-cancer process to the drainage and dehydration processes. The vertical flow on the right side connected by the broken line shows the response when abnormal vibration occurs during dewatering.

〔Effect of the invention〕

As described above, according to the present invention, drainage and dewatering can be performed in a place where the cloth is not shifted by using an amplitude detection sensor, so that unbalanced vibrations during dewatering can be suppressed to a small level.

Furthermore, the sensor is used to detect abnormal vibrations occurring during dehydration and the opening of the lid during dehydration to stop the dehydration rotation, so the configuration of the detection means is simple.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG.
1 is a vertical cross-sectional view of the entire anti-layer machine, Figure 2 is a control circuit diagram, Figure 3 is a graph of the output of the sensor that detects the amplitude, and Figure 4 is a graph of the output of the sensor during the washing process. , Figure 5 is a graph of the sensor output during dehydration, Figure 6 is a graph of the sensor output when dehydration is completed to i, which is offset, and Figure 7 is a graph of the sensor output when the lid is opened during dehydration. The graph of the output of the sensor, FIG. 8, is a flowchart of the entire process of the washing machine. 15...Washing marsh dewatering tank, 8...Water tank, 9...Motor, 20 bamboo Z's 1 grass, 3 national calculations Q mouth grass 5's R1'4 (ff7-11trJt
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Claims (1)

[Claims] 1. In a washing machine that has a spin-drying process after the washing or rinsing process, a sensor is installed to detect the shaking of the water tank that occurs during the washing or rinsing process, and the sensor detects when the output of the sensor continues to be low near the end of the washing process. Stop the operation of the stirring blades, then drain and dewater.
A method for operating a washing machine characterized in that abnormal vibrations during spin-drying are detected by the same sensor and the spin-drying is stopped, and opening of the lid during spin-drying is detected by a concave center to stop the spin-drying.