JPS5936556B2 - Automatic washing machine load detection device - Google Patents

Description

Detailed Description of the Invention The present invention provides an automatic washing machine that automatically performs a series of washing, rinsing, and dehydrating operations. This is related to the load detection device that detects the load.
Before the machine starts the washing operation, it performs the supply/drainage and dewatering process for a certain period of time in addition to the washing operation.
The system detects the drive current of the motor when dehydrating items that have been given a moderate amount of moisture, and compares it with a preset standard to detect the amount of items being washed.

In conventional washing machines of this type, the amount of water, washing time, etc., which serve as criteria for selection, was generally left to the user's intuitive judgment.

For this reason, the amount of water to be washed may be inappropriate for the amount of items to be washed, or the washing time may not be appropriate. This resulted in fabric damage and water wastage.

The present invention has been made in view of the above-mentioned conventional problems, and one embodiment thereof will be described below based on the drawings.

In the figure, 1 is a washing and dewatering tank, 2 is an outer tank, and 3 is a stirring blade.

Reference numeral 4 denotes a motor that selectively drives the stirring blade 3 and the washing and dehydrating tank 1.

5 is a drive current detection device for detecting the drive current of the motor 4; 6 is 1il detected by the drive current detection device 5;
i is set in advance as a standard [direct and comparison, judgment °
It is a comparison device for

Reference numeral 7 denotes a storage device for storing data obtained from the comparison device 6.

8 receives the signal from the storage device 7 to drive the motor 4 and the water supply valve 9. It is a stroke control device that controls the progress of the washing machine by opening and closing the drain valve 10.

In the above configuration, before the washing machine starts the washing operation, the water supply valve 9 is opened in response to a signal from the stroke control device 8 to supply a certain amount of water.

After water soaks into the items to be washed in the washing and dewatering tank 1, the drain valve 10 is opened to drain the water.

At this time, the stirring blades may be rotated for a short period of time in order to soak water into the items to be washed.

After washing the items in this way (after giving appropriate moisture to the items, the motor 4 is driven by the stroke control device 8, and the washing and dehydration tank 1 is
Rotate to perform dehydration operation.

At this time, a difference is recognized in the change in the electric current required to drive the motor 4 depending on the amount of laundry to be washed, and by capturing these differences, it is possible to judge the amount of laundry in the washing/dehydration tank 1.

Therefore, the current for driving the motor 4 is detected by the drive current detection device 5, and this (direction) is compared with a reference 1st shift previously set according to the amount of cloth in the comparator 6. can be detected.

The data on the amount of cloth obtained in this way is stored in the storage device 7.
As the washing process progresses, it is sent to the process control device 8VC at any time, and serves as a reference for determining the time, strength, etc. of washing, rinsing, and spin-drying.

Here, the method of comparison in the comparison device 6 may be either a method of comparing the rate of change of the current or a method of comparing the current cabinet itself.

As described above, according to the present invention, the automatic washing machine performs water supply, drainage, and spin-drying operations before starting the normal washing operation, detects the motor drive current during the spin-drying operation, and By comparing and making judgments, it is possible to detect the amount of laundry in the washing machine.

When using a washing machine, the amount of items washed is one of the major factors that determines the operating conditions of the process such as water level, strength of water flow, washing time, dehydration time, etc. In conventional machines, the determination of these operating conditions was largely left to the empirical judgment of the user.

However, according to the present invention, since the amount of items to be washed can be automatically detected, it becomes extremely easy to determine the operating conditions for each of the above steps.

In some cases, it is also possible to automatically set each condition.

In particular, due to the conventional operation being complicated, etc.
The number of switching stages for water level, water flow, etc., which was previously limited to stages, is now
By applying the present invention to automate water level and water flow settings, the number of stages can be dramatically increased, and in some cases, changes can be made in an analog manner.

As described above, by using the present invention, the amount of washed items can be automatically detected, and the most efficient washing, rinsing, and spin-drying times can be set at the optimal water level and water flow.
It is possible to obtain great effects such as saving water, saving electricity, and preventing damage to cloth.

[Brief explanation of the drawing]

The drawing is a block diagram showing an automatic washing machine according to an embodiment of the present invention. 4... Motor, 5... Drive current detection device, 6... Comparison device, 7... Storage device, 8... Stroke control device, 9... Water supply valve, 10... Drain valve.

Claims (1)

[Claims] 1. In an automatic washing machine that automatically performs a series of washing, rinsing, and dehydrating operations, a motor drive current detection device, a comparison device that compares the detected drive current with a preset standard, A storage device that stores the amount of water detected by this comparison device, and a stroke control device that controls the process of the washer, such as opening and closing the supply/drain valves and driving the motor, based on the data stored in this storage device. (Before starting operation, a certain amount of water is supplied and drained to moisten the items to be washed, and then dehydration is performed, and the change in motor drive current at that time is A load detection device for an automatic washing machine, characterized in that it is configured to detect and compare the amount of cloth to be washed through the current detection device and comparison device.