JPH02168992A - Full automatic washing machine - Google Patents

Abstract

PURPOSE:To decide collision which is caused by unbalance with high accuracy by providing an abnormality deciding means to input the signal of a collision detecting means and to output an abnormality signal and directly deciding whether the vibration of a water receiving tank due to the inclination of cloth after the start of dehydration is abnormal or not according to an impulse value which hits an outer box. CONSTITUTION:A pressure sensor 19 is attached to the inner surface of an outer box 1. A collision detecting means 20 is provided to convert the detected pressure of the pressure sensor 19 to an electric signal. The collision detecting means 20 sends strengthness at the time of collision as a signal to a pressure value input part 21 in a control part 24. It is decided by an abnormality deciding means 22 whether the value going into the pressure value input part 21 exceeds a set value or not. When a detection time T is a set dehydration time T' or above, a signal is outputted from a timer 26 to an output part 23 and the output is stopped since the time for dehydration is finished. When the detection time T is shorter than the set dehydration time T', the signal is repeated from the collision detecting means 20 to the pressure value input part 21 an abnormality deciding means 22 until the detection time T goes to the set dehydration time T'.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a fully automatic washing machine used in general households.

2. Description of the Related Art A conventional fully automatic washing machine has a structure as shown in FIG. In the figure, 1 is an outer box, and the upper part of this outer box 1 is covered by an upper frame 2. Furthermore, legs 3 are provided at the bottom of the outer box 1. An operation panel 4 housing a control unit is arranged behind the upper frame 2.
A central opening 5 is covered with a lid 5 so as to be openable and closable. On the other hand, inside the outer box 1, a water tank 8 is suspended by a rod 9 in a vibration-proof manner. The water receiver is in tank 8, which also serves as a washing and dehydrating tank (
A dehydration tank (hereinafter referred to as a dehydration tank) 1o is rotatably arranged, and a balancer 11 is attached to its upper part. Dehydration tank 10
Stirring blades 12 are disposed at the inner bottom of the stirring row 12, and the rotation of a motor 14 is transmitted to a belt 15 via a deceleration drive section 13. On the other hand, a safety switch 7 is provided in the operating spring L'4, and an operating lever 6 for operating the safety switch 7 extends downward, so that the water receiver is activated when the tank 8 swings around. 16 is a drain valve, 17 is a cock, and 18 is a drain horn.

With the above configuration, a series of courses starting from washing is operated, but if the cloth is lopsided during washing, the tank 8 swings around and hits the outer box 1 in the water tray at the initial stage of dehydration. At this time, if the water tank 8 swings around a lot and it hits the outer box, the safety switch 7 will be activated and the water will be refilled, and the process of washing again and removing the cloth will start. It was something I could enter.

Problems to be Solved by the Invention In the above configuration, the operating lever 6 of the safety switch 7 does not actually work because the water receiver is located between the tank 8 and the outer box 1 and the water receiver detects the whirling of the tank 8. In the case of the water receiver, the safety switch 7 sometimes operated even when the tank 8 did not touch the inner surface of the outer box 1. That is, the safety switch 7 operates when the operating lever 6 is pushed toward the outer box 1 side on the side of the water tank 8, and the pushing width exceeds a predetermined width. Due to variations in the parts and mounting position, the operating point fluctuates depending on the mounting position, and the highly accurate water receiver was unable to detect when the tank collided with the inner surface of the outer box.

In view of the above problems, it is an object of the present invention to detect collisions caused by whirling of a tank with high accuracy.

Means for Solving the Problems In order to achieve the above object, the present invention has a pressure sensor attached to the inner surface of the tank in the outer box or water tray of the washing machine, and a cloth shifting mechanism in accordance with this pressure sensor. In some cases, the outer box or water receiver is equipped with a collision detection means for detecting the impact force colliding with the tank, and an abnormality determination means for inputting the signal of this collision detection means and outputting an abnormality signal, and the abnormality determination means is configured to detect the collision. When the impact force value from the detection means exceeds a predetermined value, an abnormality signal is output.

Function According to the above configuration, when the cloth is lopsided during the early stage of dehydration, the water receiver can be detected by measuring the impact value between the cypress and the outer box using the collision detection means when the monk swings a lot. can be made to perform the same function.

Moreover, since the collision of the outer box or the water receiver directly with the tank is detected, the detection accuracy can be dramatically improved.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1, 2, and 3. First, the overall structure of the washing machine will be explained with reference to FIG. Note that the same parts as in the conventional configuration are given the same reference numerals, and the explanation thereof will be omitted. As shown in the figure, the feature of the present invention is that a pressure sensor 19 is attached to the inner surface of the outer box 1.

It has a collision detection means 2o that converts the pressure detected by the pressure sensor 19 into an electrical signal. This collision detection means 20
sends the strength at the time of collision to the pressure value input section 21 in the control section 24 as a signal. The abnormality determining means 22 determines whether the value input to the pressure value input section 211C exceeds a set value. The result determined by this abnormality determining means 22 is outputted to the output unit 2.
However, when the abnormality determination means 22 determines that the value exceeds the set value, the motor 14. Drain valve 16
It sends signals to electrical components such as Pressure value input section 21.
Abnormality determination means 22. The output section 23 constitutes a control section 24 .

The operation of the above configuration will be explained based on the flowchart of FIG. When dehydration is started, the output section 2 of the control section 24
From 3, (- cod 4) is output to the drain valve 16, and the dehydration information that also serves as the tip of the bulge begins to be passed down. At this time, if the cloth is uneven or the installation surface is slanted, the water receiver will be drained from the tank 8. Outer box 1
corresponds to The collision at this time is input from the pressure sensor 19 to the pressure value input section 21 as an electric signal by the collision detection means 20. If this input value is B, the abnormality determination means 22
It is determined whether B is larger than the set value A within the set value A. B
If it is above , the abnormality determining means 22 outputs a signal to cut the output from the output section 23, and the motor 14 and the drain valve 16 are stopped. After this, refill the water and
The process moves on to washing, loosening the fabric, and then moving on to dehydration again.

If B is smaller than A, the abnormality determining means 22 outputs a signal from the output unit 23 so that the output continues as it is, and the motor 14 and the drain valve 16 remain as they are tAk1.
Continue m. At this time, the dehydration time T is set on the clock 26 at the same time.
', it is determined whether the detection time T exceeds the set dehydration time.

If ril T at the time of detection reaches the set dehydration time 77 or more, the dehydration time has ended, and the clock 26 is displayed on the output section 23.
The OK signal is output and the output is stopped. If the detection time T is smaller than the set dehydration time T', the collision detection means 2o sends a signal to the pressure value input section 21 and the abnormality determination means 22 repeatedly until the detection time T reaches the set dehydration time T'. .

In the above embodiment, the pressure sensor 19 is attached to the outer box 1, but the pressure sensor 19 may be attached to the inner surface of the tank 8, or by attaching a plurality of pressure sensors, It is also possible to achieve even greater effects.

Effects of the Invention As is clear from the above embodiments, according to the present invention, it is possible to determine whether or not the water receptacle caused by the shifting of the cloth after the start of dehydration is abnormal based on the shock value of the tank directly hitting the outer box. By making this determination, a highly accurate unbalance-based M' determination can be performed, and a fully automatic washing machine with stable quality can be provided.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a fully automatic washing machine showing an embodiment of the present invention, Fig. 2 is a sectional view of the same, Fig. 3 is a flowchart showing the control details, and Fig. 4 is a block diagram of a fully automatic washing machine of the prior art. FIG. 1...Outer box, 8...Water receiver is tank, 19.
... Pressure sensor, 2o ... Collision detection means, 22 ... Abnormality determination means. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (1)

[Claims] A water tank that houses the dewatering tank, an outer box that houses the water tank, a pressure sensor attached to the outer box or the inner surface of the water tank, and this pressure sensor to measure the impact force when it collides with the outer box or the water tank. and an abnormality determining means that receives a signal from the collision detecting means and outputs an abnormal signal, and the abnormality determining means detects when the impact force value from the collision detecting means is equal to or higher than a predetermined value. , a fully automatic washing machine that outputs an abnormal signal.