JPH04285590A - Washing machine - Google Patents

Abstract

PURPOSE:To dewater the wash by a centrifuge of a washing machine as per invention to a proper degree in accordance with what the wash contains. CONSTITUTION:The quantity of the wash is sensed at the starting time of washing, and then at centrifuge starting, the quantity of wash and its water content are determined synthetically. From the obtained result, the resultant wash quantity is subtracted, and thereby the water content of the wash is calculated. On the basis of the result of this calculation, necessary correction is applied to the dewatering time, and thereupon the centrifuge is executed.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine capable of washing and dehydrating laundry.

0003

2. Description of the Related Art Conventionally, there have been provided washing machines capable of washing and dehydrating laundry, such as dehydrating and dehydrating washing machines and dual-tub washing machines.

[0004] In recent years, however, there have been provided devices in which the amount of laundry, ie, the amount of cloth, is detected and the washing and dehydration are controlled based on the detection result.

[0005]

[Problems to be Solved by the Invention] However, as described above, when spin-drying is controlled only based on the detection result of the amount of laundry, depending on the contents of the laundry, dehydration may be insufficient or dehydration may be insufficient. This caused problems such as overload.

The present invention has been made in view of the above-mentioned circumstances, and therefore, its object is to provide an excellent washing machine that can properly dehydrate laundry depending on its contents. .

[Configuration of the invention]

[0008]

[Means for Solving the Problems] In order to achieve the above object, the washing machine of the present invention is provided with a laundry amount detecting means for detecting the amount of laundry, and also detects the amount of laundry and the amount of laundry at the start of dehydration. Laundry amount/moisture amount detection means for comprehensively detecting the amount of moisture contained in the laundry is provided, and the laundry amount/moisture amount detection means is subtracted from the detection result by the laundry amount/moisture amount detection means to perform washing. The present invention is characterized by comprising a water content calculation means for calculating the amount of water contained in an object, and a control means for controlling dehydration based on the calculation result by the water content calculation means.

[0009]

[Effect] Even if the amount of laundry is the same, the amount of water it contains will vary depending on the quality of the fabric, such as cotton or synthetic fibers. If you know this amount of water and perform dehydration, you will be able to dehydrate just the right amount.

[0010] First, the amount of laundry is detected, and then,
By comprehensively detecting the amount of laundry and the amount of water contained in the laundry at the start of spin-drying, and subtracting the detection result of the amount of laundry from this detection result, the amount of water contained in the laundry can be calculated. is calculated. Once the amount of water contained in the laundry has been calculated, dehydration can be controlled based on the calculated amount, so that the dehydration can be carried out appropriately.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

First, FIG. 2 shows the entire outer box 1 of a washing machine, especially a washing machine with dewatering function (fully automatic washing machine), in which an outer tub 2 and an inner tub 3 are arranged. The inner tank 3 has a large number of dehydration holes 4 formed around its circumferential side, and an agitator 5 arranged at its inner bottom. On the other hand, a drive mechanism 7 mainly including a motor 6 is disposed at the outer lower part of the outer tank 2, and this drive mechanism 7 rotates the stirring body 5 and the inner tank 3. There is. In addition, a drain valve 8 and the like are also provided at the outer lower part of the outer tank 2.

On the other hand, a top cover 9 is mounted on the outer box 1, and a control device 10, which is a moisture content calculation means and a control means, is disposed inside the front part of the top cover 9. There is. This control device 10 is specifically constituted by a microcomputer, and as shown in FIG. 3, a water level sensor 11 is provided to detect the water level in the inner tank 3 (inner tank 2).
A water level detection signal is input from the switch input section 12, which is composed of various switches, and a switch signal is also input from the switch input section 12, which is composed of various switches. A phase difference detection signal is input from the .

The phase difference detection device 13 electrically detects the amount of load applied to the motor 6 of the drive mechanism 7 and outputs the phase difference detection signal as a laundry amount detection signal or a laundry amount/moisture amount detection signal. Specifically, as shown in Figure 4, it detects the voltage (V) applied to the motor 6 and obtains pulses that rise and fall at its zero cross point, and at the same time detects the current (I) flowing through the motor 6. Similarly, a pulse that rises and falls at the zero crossing point is obtained, a pulse corresponding to the phase difference θ is obtained from both pulse waveforms, and the voltage signal obtained by smoothing this pulse is further digitized to calculate the amount of laundry and the like. It is designed to output a detection signal according to the amount of laundry and moisture content.

The control device 10 drives the motor 6 based on the water level detection signal from the water level sensor 11, the switch signal from the switch input section 12, and the phase difference detection signal from the phase difference detection device 13. drive circuit 14 that drives the water supply valve 15 that supplies water into the inner tank 3, and drive circuit 17 that drives the drain valve 8. A control signal is also given to each display section 18 consisting of the following.

[0016]The operation of the above-mentioned configuration, together with the functions of the control device 10, will be described below with reference to FIG.

When the control device 10 starts its operation,
First, it is determined whether the start switch has been operated (step S1). If it is determined that the start switch has been operated, the water supply valve 15 is opened to start washing, and water is supplied to the "detected" water level, which is one step lower than the "low" water level, for example (step S2). After this water supply, the stirring body 5 is rotated by the drive mechanism 7, and at this time, the voltage and current of the motor 6 are detected as described above, and the phase difference detection device 1
3, the amount of laundry is detected (step S3). Then, based on the detection results, settings are made for washing water level, time, strength, etc., and subsequent dehydration time (step S4), and then full-scale washing (washing/rinsing) is executed based on the settings. (Step S5).

After washing, the drive mechanism 7 rotates the inner tub 3 together with the agitator 5 in order to start dewatering. At this time, the voltage and current of the motor 6 are detected as described above, and the phase difference detection device 13 detects the voltage and current of the motor 6 as described above. Comprehensive detection of the amount of laundry and the amount of moisture contained in the laundry is performed (step S6). After this detection, the amount of moisture contained in the laundry is calculated by subtracting the detected value of the amount of laundry in step S3 from the total detected value of the amount of laundry and moisture (step S7).
), and based on the calculation result, in this case, the dehydration time is then corrected (step S8).

[0019] Here, the correction of the dehydration time will be described. Regarding the detection result of the amount of laundry in the previous step S3, as shown in FIG. 5, it is 1.5 kg or less, and 1.
It is divided into three categories: 5-3 kg and 3 kg or more. The standard time for dehydration is 4 minutes if the amount of laundry detected is 1.5 kg or less, 5 minutes if the amount of laundry is 1.5 to 3 kg, and 3 kg.
If it is more than g, it is 6 minutes. On the other hand, when the detection result of the amount of laundry is 1.5 kg or less, the time is shortened by 1 minute (-1 minute) when the calculation result of the moisture amount in step S7 is less than 1 kg. , when the water content calculation result exceeds 3 kg, the time will be extended by 1 minute (+1 minute)
Do this. Also, the detection result of the amount of laundry is 1.5 to 3 kg.
In this case, when the water content calculation result in step S7 is less than 1.5 kg, the time is shortened by 1 minute, and when the water content calculation result is more than 6 kg, the time is extended by 1 minute. . Furthermore, the detection result of the amount of laundry was 3 kg.
In the above case, when the water content calculation result in step S7 is less than 3 kg, the time is shortened by 1 minute, and when the water content calculation result is more than 10 kg, the time is extended by 1 minute.

[0020] In this way, the necessary dehydration time is set, and then full-scale dehydration is executed based on the setting (step S
9).

As described above, according to the present configuration, the amount of laundry is detected at the start of washing, and then, the amount of laundry and the amount of water contained in the laundry are comprehensively detected at the start of spin-drying. Then, by subtracting the detection result of the amount of laundry from this detection result, the amount of water contained in the laundry is calculated, and based on the calculation result, the necessary correction of the spin time is made and the spin is executed. As a result, dehydration can be carried out appropriately depending on the amount of water contained in the laundry, preventing insufficient dehydration or insufficient dehydration, which was conventionally controlled only by the amount of laundry. There is no problem of excessive dehydration.

Note that correction of dehydration may be performed by changing the rotational speed of the motor instead of adjusting the time as described above.

[0023] In addition, the present invention is not limited to the embodiments described above and shown in the drawings. It may be implemented with appropriate changes within the scope.

[0024]

Effects of the Invention As is clear from the above description, the washing machine of the present invention is equipped with a laundry amount detection means for detecting the amount of laundry, and also detects the amount of laundry and the amount of laundry contained in the laundry at the start of dehydration. A laundry amount/moisture amount detection means for comprehensively detecting the amount of moisture contained in the laundry is provided, and the detection result by the laundry amount detection means is subtracted from the detection result by the laundry amount/moisture amount detection means. It is characterized by comprising a moisture content calculation means for calculating the amount of moisture, and a control means for controlling dehydration based on the calculation result by the moisture content calculation means, thereby allowing the laundry to be processed according to its contents. It has the excellent effect of being able to dehydrate appropriately without excess or deficiency.

[Brief explanation of the drawing]

FIG. 1: Flowchart showing one embodiment of the present invention.

[Figure 2
】 Overall longitudinal side view

[Figure 3] Schematic electrical configuration diagram

[Figure 4] Waveform diagram for explaining the function of the phase difference detection device

[Figure 5] Diagram showing the details of dehydration control

[Explanation of symbols]

Reference numeral 10 indicates a control device (moisture content calculation means/control means), and 13 indicates a phase difference detection device (laundry amount detection means/laundry amount/moisture amount detection means).

Claims (1)

[Claims] Claim 1: A device capable of washing and dehydrating laundry, comprising a laundry amount detection means for detecting the amount of laundry, and a means for detecting the amount of laundry and the amount of water contained in the laundry at the start of dehydration. laundry amount/moisture amount detection means for comprehensively detecting the amount of laundry, and moisture content for calculating the amount of moisture contained in the laundry by subtracting the detection result by the laundry amount detection means from the detection result by the laundry amount/moisture amount detection means. 1. A washing machine comprising: a moisture amount calculation means; and a control means for controlling dehydration based on a calculation result by the moisture amount calculation means.