JPH0420387A - Fully automatic washing machine - Google Patents

Abstract

PURPOSE:To improve accuracy for deciding the imbalance of cloth by deciding the imbalance of the cloth by executing correction according to the outputs of a cloth amount detecting means and an operational voltage detecting means. CONSTITUTION:A control means 1 controls the operation of the washing machine and executes washing, rinsing and dehydration by driving a motor 7 while controlling the ON/OFF of bidirectional thyristors 5 and 6 according to a program set by inputting outputs from a cloth amount detecting means 2 to detect the amount of the cloth put into a washing tank, operational voltage detecting means 2 and cover open/close detecting means 4. In this case, the controller divides the detection time of the cover open/close detecting means 4 and decides the imbalance of the cloth by executing the correction according to the outputs of the cloth amount detecting means 2 and the operational voltage detecting means 3. Thus, the accuracy for deciding the imbalance of the cloth can be improved by deciding the operation normal in the case of a high voltage and a little cloth amount or of a low voltage and a much cloth amount.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fully automatic washing machine having a function of determining unbalance of cloth that occurs during dehydration.

BACKGROUND OF THE INVENTION In recent years, fully automatic washing machines have been equipped with an unbalance detection function to correct the unbalance, since vibrations and noise become large when unbalanced fabric occurs during spin-drying.

Conventionally, in this type of fully automatic washing machine, when determining the unbalance of the cloth that occurs during spin-drying, a period of 0.2 seconds or less is determined as unbalanced cloth based on the operating time of the lid opening/closing detection means, and 0.2 seconds or less is determined as unbalance of the cloth. It was determined that the lid of the washing machine was opened or closed for two seconds or more.

Problems to be Solved by the Invention In such conventional fully automatic washing machines, when determining cloth imbalance, the operating time of the lid opening/closing detection means depends on the amount of cloth put into the washing tub, the capacity of the washing machine, Depending on the operating voltage during operation, the operating time of the lid opening/closing detection means is not constant. Therefore, if the lid opening/closing detection means makes a judgment with an operating time of 0.2 seconds, it will be determined that the fabric is unbalanced even during normal operation, and an automatic unbalance correction process will be carried out as a post-detection process, resulting in This has the problem that it takes a long time.

The present invention is intended to solve the above-mentioned problems, and aims to improve the accuracy of determining fabric imbalance, prevent erroneous determination during normal conditions, and shorten the time until washing is completed.

Means for Solving the Problems In order to achieve the above object, the present invention provides a cloth amount detection means for detecting the amount of cloth put into the washing tub, and a lid opening/closing means that also serves to detect the unbalance of the cloth that occurs during spin-drying. , an operating voltage detection means, and a control means for controlling the operation of the washing machine,
The control means divides the detection time of the lid opening/closing detection means and corrects it based on the outputs of the cloth amount detection means and the operating voltage detection means to determine the unbalance of the cloth.

The present invention operates by means of solving the problem described above, when the detection time of the lid opening/closing detection means is short and the operating voltage is high and the amount of cloth is small, and when the detection time of the lid opening/closing detection means is relatively long. If the voltage is low and the amount of cloth is large, it can be determined to be normal.
It is possible to prevent normal cloth from being judged as unbalanced.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG.

As shown in the figure, the control means 1 controls the operation of the washing machine, and includes a cloth amount detection means 2 for detecting the amount of cloth put into the washing tub (not shown), an operating voltage detection means 3, and a lid opening/closing means. The respective outputs of the detection means 4 are inputted, the bidirectional thyristors 5 and 6 are controlled on and off according to a set program, and the motor 7 is driven to perform washing, rinsing, and spin-drying. The lid opening/closing detection means 4 detects opening/closing of a lid provided above the washing tub and detects unbalance of cloth during spin-drying. Note that 8 is a phase advance capacitor of the motor 7.

The operation of the above configuration will be explained with reference to FIG.

The output signal from the control means 1 turns on the bidirectional thyristor 5, rotates the motor 7, and enters the dewatering process. After the start of the dehydration process, the control means 1 determines the voltage detected by the operating voltage detection means 3 at A in the flowchart, and determines that the voltage is 90V, 1
It is classified into three stages: oov, 11 oV and temporarily stored in a storage device. Next, in B of the flowchart, the information detected by the cloth amount detection means 2 is judged, and the
It is classified into stages and temporarily stored in a storage device. In this state, the dehydration process is continued while checking the signal of the lid opening/closing detection means 4,
If no signal is detected from the lid opening/closing detection means 4 until the end of the dehydration process, it is assumed that the process is normal and the process proceeds to the next process.

When the signal from the lid opening/closing detection means 4 is detected at C in the flowchart, the process moves to D in the flowchart and the lid opening/closing detection time is determined to be 0.1 seconds to 0.4 seconds or 0.4 seconds.
It is divided into three categories: seconds to 1.0 seconds, and 1.0 seconds or more, and if it is 1.0 seconds or more, it is determined that the user has opened the lid, and after the lid opening/closing process is performed.
Return to the beginning of the dehydration process.

In E of the flowchart, when the lid opening/closing detection time is 0.1 seconds to 0.4 seconds, the operating voltage is 110■, and the detected amount of cloth is small, it is determined that the lid is temporarily opened/closed with a small amount of high voltage cloth. Then, the process will proceed to the normal dehydration process. In F of the flowchart, when the lid opening/closing detection time is 0.4 seconds to 1.0 seconds, the operating voltage detection is 90V, and the amount of cloth detected is large, it is determined that the lid opening/closing is detected as a temporary lid opening/closing of a low voltage and large amount of cloth. Then, the normal dehydration process begins. In cases other than the above, the unbalance correction step G in the flowchart is performed assuming that an unbalance has occurred due to the bias of the cloth.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, the control device divides the detection time of the lid opening/closing detection means and makes corrections based on the outputs of the cloth amount detection means and the operating voltage detection means. Since the unbalance of the fabric is determined by using the 3D method, it can be judged as normal in the case of a small amount of cloth with high voltage or a large amount of cloth with low voltage, improving the accuracy of determining the unbalance of the cloth. It is possible to prevent erroneous judgments, eliminate unnecessary unbalance correction processes, and shorten the time it takes to finish washing.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the main parts of a fully automatic washing machine according to an embodiment of the present invention, and FIG. 2 is a flowchart of the main parts of the fully automatic washing machine. 1... Control means, 2... Cloth amount detection means, 3... Operating voltage detection means, 4... Lid opening/closing detection means.

Claims (1)

[Claims] A cloth amount detection means for detecting the amount of cloth put into the washing tub, a lid opening/closing detection means that also serves to detect the unbalance of the cloth that occurs during spin-drying, an operating voltage detection means, and a control means for controlling the operation of the washing machine. The fully automatic washing machine is characterized in that the control means divides the detection time of the lid opening/closing detection means, corrects it based on the outputs of the cloth amount detection means and the operating voltage detection means, and determines the unbalance of the cloth. Machine.