JPS6043154B2 - Fully automatic washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to provide a fully automatic washing machine in which a large starting load is not applied to the dehydration motor even during the final dehydration process.

The washing method of drum-type washing machines is so-called pound washing, so the washing water level is low during the washing process, but the water level is raised during the final rinsing process to improve the rinsing effect.

On the other hand, during the dehydration process, both the intermediate dehydration after the washing process and the final dehydration after the final rinsing process are performed by first draining the water in the washing drum and then rotating this drum at high speed. The moisture content of the laundry and the moisture content of the laundry when drained after the final rinsing process are different, with the latter being greater than the former. As a result, the motor starting load during the final dehydration performed after the final rinsing process becomes larger than the starting load during the intermediate dehydration. The present invention aims to make the starting load of the dewatering motor the same during intermediate dewatering and final dewatering.
Numerals 4, 5, and 6 are program switches, whose contacts are opened and closed by the program timer motor 7 as time progresses, and in the programming diagram in Figure 2, the hatched portions close the contacts. It's time.

Reference numeral 8 denotes a reversing timer motor, which periodically reverses the reversing switch 9 as the motor rotates, and the right low-speed rotating electromagnetic switch 1? and the left low-speed rotating electromagnetic switch 11 are alternately energized.

When these left and right low speed rotating electromagnetic switches 10 and 11 are energized, the washing motor is periodically reversed, and the washing drum rotates left and right at low speed to perform washing, and at the same time, the normally closed contacts 10-1,
11-1 are opened alternately. 12 is a low water level switch, which closes to the normally closed contact NC side when the water in the washing drum is below a predetermined low water level, and closes the normally open contact No when the water reaches the predetermined low water level. When switching to the normally open contact No., the normally closed contact will not return to the NC side unless the water in the washing drum is almost completely exhausted.

13 is a high water level switch, which closes to the normally closed contact NC side when the water level is below a predetermined high water level, and closes the normally open contact No. when the high water level is reached; however, once it switches to the normally open contact No. The normally closed contact will not return to the NC side unless the water is drained until it reaches the normal state.

Reference numeral 14 denotes a steam valve, which opens when electricity is applied to supply steam to the bottom of the washing drum and heat the water in the washing drum. Thermostat 15 detects the temperature of this water and opens the contact. At this time, the power to the steam valve 14 is cut off, and the supply of steam is stopped.

16 is a relay for low water level, which closes normally open contact 16-1 when energized and at the same time opens normally closed contact 16-2; 17 is a relay for high water level, which has normally closed contacts 17-1, 17-2 when energized.
It opens and simultaneously closes the normally open contact 17-3.

18 is a water supply valve, which opens when electricity is applied to supply water into the washing drum; 19 is a delay relay for low-speed rotation; when the time is up after a certain period of time has elapsed after electricity is applied, normally closed contact 19-1 is opened and the This closes the normally open contacts 19-2 and 19-3. Reference numeral 20 denotes a vibration switch, and when the washing drum vibrates abnormally during spin-drying operation, this vibration switch is temporarily opened to cut off the current to the slow rotation delay relay 19. 21 is a relay for low-speed rotation, which opens seat closing contact 21-1 when energized and simultaneously closes normally-open contact 21-2; 22 is an electromagnetic switch for high-speed dehydration rotation; when energized, it rotates the dehydration motor and washes the clothes. The drum is rotated at a high dewatering speed.

23 is a drain valve self-holding relay; when the normally open contact 19-3 of the slow rotation delay relay is closed and the drain valve self-holding relay is energized, the normally open contact 23-1 is closed and the self-holding circuit is activated. It has come to consist of

Reference numeral 24 denotes a drain, which opens when electricity is applied to drain water from the washing drum.

Figure 3 shows the relationship between the washing drum and the water level switch, and shows the washing tub 2 in which the washing drum 25 is rotatably installed.
The low water level switch 12 and the high water level switch 13 are connected to the bottom of the tank 6 via an air trap 27. In the figure, A indicates a high water level, B indicates a low water level, and C indicates a state where there is no water in the drum. The operation of the above configuration will be explained below.

During the washing process, the first, second, fourth, and fifth program switches 1, 2, 4, and 5 close their contacts. As a result, the reversing timer motor 8 rotates, and the reversing timer 9 periodically switches its contacts to alternately energize the right low-speed rotating electromagnetic switch 10 and the left low-speed rotating electromagnetic switch 11. Rotate the drum 4 times periodically. At the beginning of the washing process, the low water level switch 12 is closed to the normally closed contact NC side, so the water supply valve 18 is energized, and the valve opens to supply water. When the water level rises and reaches a predetermined low water level, the low water level switch 1
2 is switched to the normally open contact NO side, and the power supply to the water supply valve 18 is cut off, so that the water supply is stopped and washing is performed. After a certain period of time has elapsed, the program switch is switched by the program timer motor 7, the first and sixth program switches 1 and 6 are closed, and an intermediate dehydration process begins.

By closing the sixth program switch 6, the low speed rotation delay saw 19 is energized and at the same time the low speed rotation relay 21 is energized.
The normally open contact 21-2 closes and passes through the left low-speed rotating electromagnetic switch 11, causing the drum to rotate at a low speed to loosen the laundry. On the other hand, when the delay relay 19 for low speed rotation is energized and a certain period of time elapses, the normally closed contact 19-1 opens and at the same time the normally open contacts 19-2 and 19-3 close. At this time, since the washing liquid remains in the washing tub, the low water level switch 12 closes the normally open contact NO, and the low water level relay 16 is energized, so its normally open contact 16 is closed.
-1 is closed. Therefore, even if the normally closed contact 19-1 of the low-speed rotation delay relay opens as described above, current continues to flow to the low-speed rotation relay 21, and its normally open contact 21-2 closes to close the left low-speed rotation electromagnetic switch. 11 to continue rotating the washing drum at a low speed. On the other hand, when the normally open contact 19-3 closes, the drain valve 24 is energized, and the valve is opened to drain water. At this time, the drain valve self-holding relay 23 is also energized to close the normally open contact 23-1 and perform self-holding. Draining is performed in this way, and when the washing water in the washing tub runs out, the low water level switch 12 switches to the normally closed contact NC side and cuts off the power to the low water level relay 16, so the normally open contact 16
-1 returns to open and stops the low speed rotation of the washing motor, and at the same time, the normally open contacts 16-2 return to close, and the normally open contacts 19-2 of the slow rotation delay relay, which are closed as described above, and this normally open contact 16-1. The electromagnetic switch 22 for dehydration high-speed rotation is energized through the closing contact 16-2, and the dehydration motor rotates to rotate the drum at a high dehydration speed to perform dewatering. When this intermediate dehydration process is completed, a first rinsing process and a second intermediate dehydration process are completed, followed by a final rinsing process.

In the final rinse step, the first, second, third, and fourth program switches 1, 2, 3, and 4 close their contacts. As a result, water is supplied by energizing the water supply valve 18 through the normally closed contact NC of the high water level switch 13, and when water is supplied to the high water level in the washing tub, the high water level switch is switched to the normally open contact NO side. On the other hand, the right and left low-speed rotating electromagnetic switches 10 and 11 are energized through the second program switch 2, and the drum rotates reversely at a low speed to perform rinsing. When entering the final dewatering process, the first, third, and sixth program switches 1, 3, and 6 close their contacts.

At this time, the high water level relay 17 is still energized and the normally open contact 17-3 is closed, so when the sixth program switch 6 is closed, the drain valve 4 is energized and the valve opens to drain water. . On the other hand, the low-speed rotation relay 21 is also energized, its normally open contact 21-2 is closed, and the left low-speed rotation electromagnetic switch 11 is energized, causing the drum to rotate at a low speed. When the drainage progresses and drops to a low water level, the high water level switch 13 closes the normally closed contact NC.
return to the side. As a result, the power to the high water level relay 17 is cut off, the normally open contact 17-3 returns to open, and the drain valve 24
Cut off the electricity to the valve, close the valve and interrupt the drainage, and
The normally open contact 17-1 is closed to energize the slow rotation delay relay 19. During this time, the low water level switch 12 is normally open contact NO.
Since flIl is closed and the low water level relay 16 is energized, its normally open contact 16-1 is closed, and the low speed rotation relay 21 is closed.
is energized to close its normally open contact 21-2, and energize the left low-speed rotating electromagnetic switch 11 to continue rotating the drum at a low speed. On the other hand, when the time has elapsed after a certain period of time has elapsed after the low speed rotation delay relay 19 is energized, the low water level switch 12
Drainage continues while the drum is rotated at low speed until the contact is switched to the normally closed contact NC side, and then the drum is rotated at high speed to perform dewatering.
When abnormal vibration occurs during dewatering and the vibration switch 20 is temporarily opened, the rotation speed returns to low speed and the clothes in the drum are redistributed.
Perform high-speed dehydration again. As described above, in the present invention, during the final dewatering process, water at a high water level is once lowered to the same low water level as at the beginning of the intermediate process, and then the water is dehydrated through the same process as the intermediate dehydrating process, so that the water is removed immediately before the drum rotates at high speed. The moisture content of the clothing is the same during the intermediate dehydration process and the final dehydration process,
As a result, the starting load of the dewatering motor can be made the same during intermediate dewatering and during final dewatering, and it is possible to eliminate the conventional drawback that the starting load increases during final dewatering.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram of the fully automatic washing machine of the present invention, FIG. 2 is a programming diagram, and FIG. 3 is a sectional view of the washing tub.

Claims (1)

[Claims] 1 Equipped with a low water level switch 12 for washing and a high water level switch 13 for final rinsing, and during the intermediate dehydration process after the washing process, the drain valve 2 is turned on after rotating the washing drum at low speed for a certain period of time.
In a fully automatic washing machine, the washing drum is rotated at high speed when the low water level switch 12 is switched by this drainage, and the normally open contact of the high water level switch 13 is opened during the final spin cycle. The drain valve 24 is opened by the high water level relay 17 connected to the (NO) side, and when the high water level switch 13 is switched by this drain, the drain valve is temporarily closed. A fully automatic washing machine characterized by having undergone a dehydration process.