JPH0576692A - Hot water controller for fully automatic - Google Patents

Abstract

(57) [Abstract] [Purpose] In a fully automatic washing machine with hot and cold water supply function, when hot water supply is set, the first supplied water temperature is a mixture of hot and cold water, Prevent damage. [Structure] When hot water is selected and supplied, hot water is mixed with hot water for several liters at first, and then hot water is supplied. [Effect] Preventing damage to clothing and discoloration in hot water,
Uniform washing water temperature can be achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine, and more particularly to a hot water control type fully automatic washing machine.

[0002]

2. Description of the Related Art Conventional hot water control type fully automatic washing machines supply hot water or a mixture of hot water and water without rotating the stirring blade until the water level reaches the specified level for washing. The stirring blade was rotated from and was washing. Therefore, the water temperature supplied to the washing tub is the same as the water temperature after the start of washing,
It is significantly different from the water temperature when supplying hot water to the washing tub,
There is a drawback that the optimum washing water temperature required for washing cannot be obtained.

Further, when hot water is selected and supplied as washing water, high temperature water of 70 to 80 ° C. is supplied from the beginning of the washing water supply, so that the high temperature water directly hits the clothes and the clothes are discolored or damaged. There was a drawback that occurred.

[0004]

SUMMARY OF THE INVENTION The present invention eliminates the drawbacks of the prior art, and when hot water is selected and supplied as washing water, the first supply is to mix hot water and water even if hot water is selected. The water supply control will allow water to be supplied.

[0005]

According to the present invention, in the process of reaching a specified water level for washing, particularly when supplying hot water, the stirring blade is rotated while supplying water from a water level lower than the specified water level for washing, This is a control device for making the water temperature in the washing tub uniform.

Further, when hot water is selected and supplied, the first supply is a mixed water of hot water and water for several liters, and then the selected hot water is supplied.

[0007]

[Function] While detecting the water temperature in the washing tub with a temperature sensor, etc., the stirring blade is rotated while supplying water from a water level lower than the prescribed water level for washing to make the water temperature in the washing tub uniform and reach the predetermined water temperature. If not, control the supply of either hot water or water to obtain the optimum wash water temperature.

When only hot water is selected, the water is first mixed with hot water, the amount of water is detected by a water level sensor, etc., and the hot water is supplied after the water amount reaches a specified amount.

[0009]

The present invention will be described with reference to the drawings. Figure 1
It is a longitudinal cross-sectional view of a fully automatic washing machine adopting the present invention, and the operation will be described in order.
The outer tub 2 is supported by the four corner bars 21 at the four corners of the outer frame 1 by the four suspension bars 5. The hanging rod 5 is provided with an oscillation spring 4 which absorbs vibration during washing and dehydration. In the case of washing, the lid 18 is opened, clothes are put into the washing tub 3, and in response to a command from the control unit 19, the motor 20 is rotated in the normal and reverse directions after water is supplied. The rotation of the motor 20 is such that the V-belt 16 is interposed and the motor pulley 17 causes the clutch 14 to rotate.
The rotation is transmitted to the clutch pulley 15 located at. The transmitted rotation is located at the center of the washing tub 3 at the time of washing by the clutch 14. The stirring blade 7 for moving the clothes is rotated to wash. At the time of drainage, the motor 2 is instructed by the control unit 19
0 is stopped, the drain valve 12 is opened, and the washing liquid in the washing tub 3 is discharged from the drain hose 13 to the outside of the machine. After the drainage, the dehydration process proceeds, but the dehydration process causes the outer tub 2 to greatly shake depending on the condition of the clothes. Therefore, a balancer 6 is provided on the upper part of the washing tub 3 to prevent the outer tub 2 from dewatering. This is to prevent runout. Motor 2 for dehydration
The rotation of 0 is transmitted to the clutch 14 via the V-belt 16 as in the case of washing, the clutch 14 rotates the washing tub 3 at a high speed, and the centrifugal force causes the moisture in the clothes to move to the outer tub 2. The dehydrated and dehydrated washing water is drained to the outside of the machine from the drain hose 13 by operating the drain valve 12. FIG. 2 is a detailed explanatory diagram of the control unit 19 described in FIG. An electronic control circuit consisting of a timer, a CPU (central processing unit), a memory, and an I / O port is designed to sequentially shift from washing to dehydration in the same way as in a timer consisting of a timer motor and a cam switch. It is known that there is. In the following embodiments, a block diagram will be described. The electronic control circuit 34 shown in FIG.
This is for automatically shifting the process from the washing process by washing to the final dehydration process. Basically, as is well known, a timer 33, a central processing unit (CPU) 32, a memory 31, an input port 29, It is composed of the output port 30, and the control command at the time of washing is the central processing unit (CPU).
The central processing unit (CPU) has an arithmetic unit and a control unit, and is the center of the system. Basically, instructions are fetched, decoded, and executed, but specifically, arithmetic and logical operations, read / write control of the contents of specified addresses in memory, input / output control to specified addresses to input / output devices, It controls the flow of the program.

The memory 31 stores a program and data, and has both read and write functions.
There are two types, a ROM having only a read function. RA
M is used as a work area for storing data or assembling a program, and ROM is used when a fixed program or fixed data is put in and the same processing is performed at any time. The input port 29 and the output port 30 are circuits that mediate when data is transferred between the CPU and the input device / output device, and are generally called I / O ports. The electric command from the fully automatic washing machine is input to the input side of the I / O port, and mainly the power switch 2
3, a water level sensor 22, a lid switch 24, a program selection switch 25, a start / stop switch 26, a temperature sensor 53, etc. are connected. Also, on the output side,
Washing motor 20, water supply valve 10, hot water supply valve 10
A, drain valve 12, clutch solenoid 27, alarm 28
Etc. are connected, and are controlled by the instruction of the CPU via the I / O port to perform a series of washing operations.
Therefore, the washing machine is controlled by the timer including the timer motor and the cam switch in the same manner as the washing machine with a timer. The washing machine is controlled by the electronic circuit as described above.

FIG. 3 is a block diagram of a washing process in a fully automatic washing machine.

Referring to the block diagram of FIG. 3, the washing process of the fully automatic washing machine will be described in more detail with reference to FIGS. 1 and 2 and operation panel FIG. Press the switch 23 and use the program selection switch 25 to
By setting an arbitrary washing course and pressing the start / stop switch 26, the water supply in FIG. 3 is started. Water is automatically supplied as washing water into the washing tub 3 from the water supply hose 11 for water and the water supply hose 11A for hot water until a predetermined water level is reached. When the water level sensor 22 notifies the microcomputer that the water level has reached the specified level, washing is started. After washing for a certain period of time, the drain valve is opened, and the wash water in the outer tub 2 is discharged from the washing machine through the drain hose 13. After the water level sensor 22 detects whether or not the washing water is completely drained, the washing water containing detergent in the clothes is dewatered by centrifugal force by moving to intermediate dehydration and rotating the washing tub 3 at a high speed. After the dehydration is completed, the first rinse is performed, so that water is supplied under the same control as for washing, and the rinse is started after the specified water amount is reached. Intermediate dewatering, rinsing and final dewatering, both at the wash and first
The same control as the intermediate dehydration and rinsing for the second time is performed, and the clothes are rinsed from the laundry and then dehydrated. FIG. 5 is a diagram showing a large liquid crystal display panel in a set state on the operation panel of FIG. 4, and hereinafter, the large liquid crystal display panel will be described as an LCD. The LCD has a display of a washing course 46, a washing water level 47, a washing time and a water supply temperature display 48, a rinse count display 49, a dehydration time display 51, a current time 50 display and the like. These display functions will be described with reference to the operation panel diagram of FIG. 4. The program selection key 25 of FIG.
By pressing the portion of the triangle arrow of, the setting of the laundry course displayed on the laundry course 46 of the LCD of FIG. 5 is represented by the triangle arrow. When the program selection key in FIG. 4 is kept pressed, the display of the laundry course 46 in FIG. 5 automatically changes, and the required laundry course 46 can be set.

Next, each time the water level changeover switch 35 of FIG. 4 is pressed, the water level setting display displayed on the LCD of FIG. 5 is indicated by a triangular arrow mark, and the washing water level can be arbitrarily set and washed. ..

By pressing the water temperature changeover switch 39 of FIG. 4, the washing time display and the water temperature display 48, Hot, Warm, and Cold, which are displayed in the LCD of FIG. 5, are sequentially changed and set. The water temperature is reduced and displayed. In addition, the LCD display of the washing time 48, the number of rinses 49, the dehydration time 51, the current time 50, etc. is set in the same manner, and then set by pressing the start switch 26 on the operation panel of FIG. Washing starts under the conditions.

FIG. 6 is an explanatory diagram of the present invention. When hot water is selected with the hot water / water switch key and the operation is started with the start key, the hot water of 60 ° C to 80 ° C is supplied, so it is directly applied to the laundry clothes thrown into the washing tub 3. Hot water of 60 ° C to 80 ° C hits, causing problems such as damage to clothes and discoloration. For this reason, when hot water is selected with the hot water / water selection key and water supply is started with the start key, in order to prevent hot water from being supplied from the beginning of the water supply head Supply mixed water to prevent damage and discoloration of clothes. After supplying a certain amount of hot water / water mixed water, hot water (60 ° C to 80 ° C) is supplied. The hot water supplied first and the hot water supplied next form a layer of hot water and hot water in the washing tub 3 as shown in the explanatory view of FIG. 7. In this state, the hot water layer and the hot water layer remain in the washing tub 3, and the water temperature in the washing tub 3 is not uniformized. In order to eliminate this double water temperature layer, as shown in FIG. 8, by rotating the stirring blade 7 while supplying water from a water level lower than the prescribed water level for washing, first the water layer supplied first and then The layer of hot water supplied is well mixed in the washing tub by the rotation of the stirring blade 7.

More detailed description will be given with reference to FIGS. 6, 7 and 8. In the case of washing with hot water only and washing, 60 ° C. to 8 ° C.
If 0 ° C hot water is supplied into the washing tub from the beginning of the water supply head, the above-mentioned trouble occurs in the hot water. Therefore, at the beginning of the water supply head, that is, about 20 to 30 liters, the mixed water Supply.

When the temperature of tap water is 20 ° C. and the temperature of hot water is 80 ° C., the mixed hot water is about 50 when the amount of water supplied is 15 liters / min for both hot water and water. It reaches around ℃ and is supplied into the washing tub.

[0018] With such a mixed water, the temperature of the water is such that even if it comes into direct contact with clothing, cotton or a blended product of cotton and synthetic fibers will not cause any trouble. About 20 to 30 liters of water
It supplies a mixture of hot water and water.

When the water level sensor 22 detects a water supply of about 20 to 30 liters, which is a mixed water of hot water and water in which laundry clothes are immersed in warm water, the water initially set (about 60 ° C.
(80 ° C) only, hot water is automatically switched, and hot water is supplied up to the water level line lower than the wash water level in FIG. 7.

In FIG. 7, the water temperature in the washing tub 3 is
A layer of hot water of about 50 ° C initially supplied and a layer of hot water of about 80 ° C supplied next are formed. These two layers are as shown in the experimental results in the temperature state of Fig. 9, As illustrated in the explanatory diagram of No. 8, unless stirring is performed by the stirring blade 7, the water temperature is not completely mixed in the washing tub 3.

FIG. 7 is an explanatory diagram of a water supply stirring process for supplying hot water from a water level lower than the specified washing water level to the specified washing water level in FIG. 8 while rotating the stirring blade 7.

As shown in FIGS. 7 and 8, the hot water and hot water are agitated to the prescribed washing water level, whereby the double layer of hot water and hot water described in FIG. The warm water supplied first and the hot water supplied next can be mixed well. Explaining this result by the experiment of FIG. 9, the mixed water of 50 ° C. supplied first and the hot water of 80 ° C. supplied next, after starting water supply stirring, in the washing tub,
It takes about 20 to 30 seconds for the mixed hot water to reach about 70
It becomes hot water of ℃.

In this way, before reaching the specified water level for washing,
The water temperature in the washing tub can be made uniform by agitating the water supply by rotating the agitating blade 7 while supplying the hot water.

[0024]

EFFECTS OF THE INVENTION When hot water is selected and supplied, the first several liters of water to be supplied are mixed water of hot water, so that high temperature water does not directly hit the clothes, preventing damage to the clothes. Can be planned.

Further, by supplying hot water while rotating the stirring blade before reaching the prescribed water level for washing, it is possible to maintain a stable water temperature mixed in the washing tub.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a fully automatic washing machine.

FIG. 2 is a block diagram of microcomputer control.

FIG. 3 is a block diagram of a fully automatic washing course.

FIG. 4 is an explanatory diagram of an operation panel.

FIG. 5 is a process display explanatory diagram.

FIG. 6 is an explanatory view of mixed water supply.

FIG. 7 is an explanatory view of hot water supply.

FIG. 8 is an explanatory view of hot water supply.

FIG. 9 is a diagram showing results of an experiment of mixed water temperature in a washing tub.

[Explanation of symbols]

 3 ... washing tub, 7 ... stirring blade, 53 ... temperature sensor.

Claims (3)

[Claims] 1. A hot water / hot water supply valve is provided, and hot water is controlled by controlling the water temperature.
In a fully automatic washing machine with a hot water control system that supplies water or a mixture of hot water and water to wash, when hot water is set and hot water is washed, the first amount of water supply, a few liters A hot water control device for a fully automatic washing machine, which supplies mixed water and then supplies hot water to a prescribed washing water level. 2. The hot water control apparatus for a fully automatic washing machine according to claim 1, wherein hot water is supplied and the water is supplied from a water level lower than a prescribed washing water level while rotating the stirring blade. 3. The hot water supply stirring operation of rotating the stirring blade while supplying hot water according to claim 2, wherein the water temperature in the washing machine is detected by a temperature sensor or the like, and the hot water supply stirring is continued until the water temperature becomes uniform, or , A hot water control device for a fully automatic washing machine, which keeps the water level up to a specified level.