JPS629358B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single-tank dehydrating washing machine that is equipped with an inner tank that serves both as a washing tub and a dehydrating tank, and an outer tub that encloses the inner tub, and which reduces the amount of water used during rinsing. It can be reduced,
Furthermore, the present invention provides a single-tank dehydrating washing machine that can perform rinsing efficiently.

An embodiment of the present invention will be described below based on the drawings. In FIG. 1, 1 is the main body of the washing machine, and the upper surface of the main body 1 has an input port 2 for loading and unloading laundry.
It is covered with a top plate 3 having a top plate 3, and legs 4 are fixed to the four corners of the bottom surface. Reference numeral 5 denotes a cylindrical inner tank having a large number of dehydrating holes 6 only in the upper half, and serves as both a washing tub and a dehydrating tank, and a circular rotary blade 8 having blades 7 is arranged in the center of the bottom. An annular balance weight 9 is installed at the top opening.
is fixed inside. Reference numeral 10 denotes a cylindrical outer tank that encloses the inner tank 5, and the outer tank 1 is disposed at the upper end opening.
An outer tank cover 11 is attached to cover the gap between the tank 0 and the inner tank 5. This outer tank 10 stores washing liquid during washing and receives dehydrating liquid during spin-drying. 12
is a blade shaft on which the rotor blade 8 is externally fitted and fixed at the upper end;
13 is an inner tank shaft into which a coupling 14 fixed to the bottom surface of the inner tank 5 is fitted;
4 is the inner tank shaft 1 by tightening the nut 15.
It is fixed to 3. This inner tank shaft 13 has a cylindrical shape, and the blade shaft 12 is rotatably fitted therein. 1
Reference numeral 6 denotes a bearing for the inner tub shaft 13, and a washing/dehydration switching clutch and a braking device are incorporated therein.
An air trap 17 is formed at the bottom of the outer tank 10, and a pressure sensitive switch (not shown in FIG. 1) is connected to the air trap 17 via an air hose 18. In addition, the outer tank 10
The drain port is connected via a drain valve 19 to a hose 20 for draining water outside the machine. Reference numeral 21 denotes an oil seal for sealing between the outer tank 10 and the inner tank shaft 13. 22 is a motor installed below the outer tank 10, and the rotational force of the motor 22 is as follows:
The signal is transmitted to the switching clutch housed inside the bearing 16 via the small pulley 23, belt 24, and large pulley 25. The suspension mechanism for the outer tank 10 will be explained below. Reference numeral 27 denotes an upper support fitting having hemispherical seats 26 fixed to the four corners of the upper end of the main body 1. The seat 26 rotatably supports a spherical body 28, and a rod 29 is attached to the spherical body 28. The upper end portion is inserted through and fixed with a pin 30. 3
Reference numeral 2 denotes a support fitting having a hemispherical seat 31 fixed to the lower outer surface of the outer tank 10, and the seat 31 rotatably supports a spherical body 33.
The lower end of the rod 29 is inserted through.
A spring receiver 35 is attached to the lower end of the rod 29, and a spring 34 is housed inside the spring receiver 35.

Next, the operation will be explained. Figure 2 is a circuit diagram, Figure 3 is an explanatory diagram of the operation of the program timer, and T ₁
~ _T7 is the program timer contact, _T8 is the pressure sensitive switch, 36 is the timer motor, 37 is the water supply valve,
38 is an electromagnet for operating the clutch and braking device housed inside the bearing 16, 39 is an electromagnet for operating the drain valve 19, and 40 is a power source.

Let me explain the washing process. When the program timer is operated, contact T ₁ closes and contact T ₇ closes.
is closed to the (a) side, and the pressure sensitive switch _T8 is closed to the NC side, so the water supply valve 37 is energized and water supply starts. When the amount of water in the inner tank 5 and outer tank 10 reaches a predetermined amount, the pressure sensitive switch T ₈ switches from the (NC) side to the (NO) side and the contact T ₆ closes to the (a) side. When the power to the water supply valve 37 is cut off, the water supply valve 3
7 closes, the motor 22 and the timer motor 36 are energized. At this time, the contact _T3 is open and the electromagnet 38 is not energized.
In this way, when the electromagnet 38 is not energized, the inner tank shaft 13
is in a braking state, and the clutch mechanism is configured to transmit the rotation of the motor 22 to the blade shaft 12. Therefore, when the pressure sensitive switch _T8 is switched to the (NO) side, the motor 22
The rotation is transmitted to the blade shaft 12, and at the same time as the rotary blade 8 rotates and washing begins, the timer motor 36 starts measuring time.

When the predetermined washing time has elapsed, the contacts T ₂ and T ₃ are closed and the electromagnets 38 and 39 are energized, so that the drain valve 19 opens and drains water, and at the same time the brake on the inner tank shaft 13 is released. The clutch mechanism is switched and the rotation of the motor 22 is transmitted to the inner tank shaft 13.

At this time, the pressure sensitive switch T ₈ is switched to the (NC) side, but the contacts T ₆ and T ₇ are switched to the (b) side, so that the motor 22 and the timer motor 36 continue to be energized, as described above. The inner tank 5 rotates. The water dehydrated from the clothes due to the rotation of the inner tank 5 is discharged into the outer tank 10 by centrifugal force from the dehydration hole 6 provided in approximately the upper half of the inner tank 5, and the drain valve 19 is opened. Therefore, the water is drained outside the machine via the hose 20. Also, time measurement by the timer motor 36 continues.

When the specified time for draining and dewatering has elapsed, contact T ₂
opens, the power to the electromagnet 39 is cut off, and the drain valve 1
9 closes. At the same time, contact T ₇ opens and the power to the motor 22 is cut off, and the motor 22 stops, but since the contact T ₆ remains closed to the (b) side, the timer motor 36 continues to be energized. Timing operation continues. Also, at this time, the contact T ₅ closes to the side (a) and the water supply valve 37 is energized, so the water supply valve 37 opens and water is poured into the inner tank 5 . When the predetermined time for water injection has elapsed, contact _T5 switches from the (a) side to the (b) side,
The power supply to the water supply valve 37 is cut off, the water supply valve 37 closes, and water injection ends. However, the flow rate of the water supply valve 37 and the time limit of the program timer are adjusted so that the water level at this time is lower than the water level during washing. A relationship has been established. When the contact _T5 switches to the (b) side, the motor 22 repeats rotation and stop due to the opening and closing of the contact _T4 , but at this time, the contact _T3 remains closed.
The inner tank 5 is rotated by a motor 22. That is, in this water-saving rinsing step, water is first supplied to a low water level, and the inner tank 5 is intermittently rotated for stirring. At this time, the inner tank 5
Since the dehydration hole 6 is provided only in the upper half of the tank, rinsing water flows from the inner tank 5 through the dehydration hole 6 to the outer tank 1.
It never goes to 0. In addition, the cam that opens and closes contact T ₄ has a lower rotational speed than other cams to increase timing accuracy, ensuring the number and time of repeated rotations and stops of the inner tank 5 during the short water-saving rinsing process. There is.

After completing the water saving rinse with less water,
After proceeding to the same draining and dewatering process as described above, and performing the water-saving rinsing process and draining and dewatering process once again, the rotary blade 8 is heated at a high water level by controlling the water level using a pressure-sensitive switch in the same manner as the first washing process. The entire process is completed by rinsing by stirring, and then performing the final drainage and dehydration process.

In this way, by intermittent operation of the inner tank 5 at a water level lower than the washing water level, water-saving rinsing can be efficiently performed using a smaller amount of water than the conventional agitation at a high water level. In order to perform this type of water-saving rinsing, there is a method of controlling a pressure-sensitive switch that detects a low water level by installing a separate pressure-sensitive switch, but such a pressure-sensitive switch is generally difficult to manufacture, and moreover, the inner tank 5
This is inconvenient because it is often switched due to pressure fluctuations when the water surface becomes wedge-shaped due to the centrifugal force caused by the rotation of the water. In addition, when such a pressure sensitive switch is provided, since the air trap 17 is provided in the outer tank 10, the outer tank 10 is also closed during water-saving rinsing.
The structure must be designed to allow water to enter, reducing the water-saving effect. On the other hand, in the washing machine of the present invention, the water supply control during water-saving rinsing is time-limited control, so there is no need to separately provide a pressure-sensitive switch for low water levels.
It can be manufactured at low cost and operates reliably. In addition, since the water supply control during water-saving rinsing is a time-limited control and is not related to the air trap 17, the dewatering hole 6 is provided only in approximately the upper half of the inner tank 5 as in this embodiment, and water is supplied to the outer tank 10 during water-saving rinsing. It is possible to prevent water from accumulating, resulting in an even higher water saving effect.

In the above embodiment, an example was described in which the inner tank 5 was intermittently rotated during water-saving rinsing, but the rotary blade 8 may be rotated instead.

As explained above, according to the single-tank dehydrating washing machine according to the present invention, an inner tank with dehydrating holes formed only in approximately the upper half is used, and during water-saving rinsing, the water level is lower than the washing water level by time control. Water is supplied and the inner tank or rotary blades are rotated intermittently to perform rinsing to the extent that this low water level does not flow out of the dehydration hole, so the water level during washing does not reach the inside of the outer tank as in conventional washing machines. Compared to a washing machine that performs rinsing using water that is supplied to the washing machine until the washing machine is filled with water, the washing machine can perform water-saving rinsing more efficiently. Furthermore, since the water supply during water-saving rinsing is time-controlled using the automatic washing machine's program timer, there is no need to separately provide a pressure-sensitive switch for detecting low water levels, and the machine can be manufactured at low cost.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal side view, FIG. 2 is a circuit diagram, and FIG. 3 is an explanatory diagram of the operation of a program timer. 5...Inner tank, 6...Dehydration hole, 8...Rotary blade, 10...Outer tank, 36...Timer motor, T1 _{to T7} ...Program timer contact, _T8 ...Pressure sensitive switch.

Claims (1)

[Claims] 1. In a single-tank dehydrating washing machine having an inner tub that serves both as a washing tub and a dehydrating tub, has a plurality of dehydrating holes, and has a rotating blade arranged at the center of the bottom, and an outer tub surrounding the inner tub. , the dewatering hole is formed only in approximately the upper half of the inner tub, a pressure-sensitive switch is provided to detect the water level during washing, and water is supplied to a water level lower than the water level during washing by time control during water-saving rinsing. 1. A single-tank dehydrating washing machine, characterized in that a program timer is provided to provide intermittent rotation to the inner tub or rotary blade so that the supplied water does not flow out from the dehydrating hole.