JPS6257358B2 - - Google Patents

Description

Detailed Description of the Invention The present invention is a single tank in which washing, rinsing, and dehydration are performed in the same tank, and in particular, in the rinsing process, water is stored in the inner tank and the inner tank is driven intermittently. The present invention relates to a type of washing machine with dehydration and dewatering functions, and more specifically, it relates to setting of the operating time of a brake braking magnet and a drain magnet during the draining and dewatering processes.

One-tank washing machines in which the water volume is set lower than the rated water volume during the rinsing process and the inner tank is driven intermittently are disclosed, for example, in Japanese Patent Application No. 105309 (1981) and Utility Application No. 1983 (1983).
No. 52320, etc., but these do not disclose specific examples regarding the operation of the brake braking magnet and the drainage magnet during the drainage and dewatering processes.

The present invention enables efficient operation of both the magnets in the drainage and dewatering processes,
An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

In Fig. 1, 1 is a washing machine casing, and 2 is an inner tank whose circumferential wall except at least the upper end is a non-porous wall, in which washing, rinsing, and dehydration are carried out. A balance ring 3 is fixed to the upper opening of the tank 2, and a flange 4 is fixed to the bottom thereof. One end of a dewatering shaft 5 is fixed to the flange 4, and a plurality of water passage holes 6 are perforated vertically in the circumferential direction. Reference numeral 7 denotes a water reservoir case, which is supported by the flange 4 and the dewatering shaft 5 through oil seals 8 and 9 so as to be relatively rotatable in a watertight manner.
0 is bored, and this water passage port 10 is connected to a water passage pipe 11 whose tip is branched into two. One end of the water pipe 11 is connected to a plurality of pressure switches 12 and 13 to detect the water pressure in the inner tub 2, and the other end is connected to the lower part of the washing machine housing 1 via a drain valve 14. The drain port 15 is connected to the drain port 15. 16 is a drain magnet that controls opening and closing of the drain valve 14. Note that these water holes 6, water reservoir case 7, water pipes 11, and pressure switches 12, 1
3 constitutes a water level detection device for detecting the water pressure in the inner tank 2. Reference numeral 17 denotes an annular body made of a flexible rubber material or the like, one end of which is fixed to the water reservoir case 7 and the other end to the outer tank 18 in a watertight manner. A rotating blade 19 is provided at the center of the bottom of the inner tub 2, and is fixed to one end of the washing shaft 20. The washing shaft 20 and the dewatering shaft 5 are arranged coaxially, and are connected to a pulley 22 through a washing/dehydrating switching clutch (not shown) built in a bearing box 21. 23 is a motor;
The rotation is transmitted to the washing shaft 20 or the dewatering shaft 5 via the motor pulley 24, V-belt 25, and pulley 22. 26 is a brake wheel fixed to the dehydration shaft 5 by appropriate means;
A band brake 28 is provided on the outer circumferential surface of the washing machine and can be operated by a brake magnet 27. During the washing process, the band brake 28 and the brake wheel 26 are brought into contact with each other by the contact friction force caused by the action of the braking magnet 27 during the washing process. Therefore, it is configured to maintain a fixed state. Further, when the brake magnet 27 is energized, the band brake 28 and the brake wheel 26 are separated, and the dewatering shaft 5 and the inner tank 2 are configured to be rotatable. 29 is a vibration isolator, which includes an outer tank 1 that rotatably accommodates the inner tank 2;
8, the vibration system such as the motor 23, etc., to the washing machine casing 1.
It is held suspended from the top four corners. 30 is a discharge port provided at the bottom of the outer tub 18, which is connected to the washing machine housing 1.
It communicates with a drain port 15 provided below.

Figure 2 shows the electrical circuit diagram of pressure switch 1.
2 and 13 have a diaphragm mechanism that operates depending on the height of the water level in the inner tank 2, that is, the magnitude of the water pressure, and each is designed to have a different trip point. 30 is a water supply valve, 31 is a timer drive motor, and 32 is a capacitor for starting and operating the motor 23. T1 to T9 are time switch contacts whose opening and closing are controlled by a cam (not shown) operated by the timer drive motor 31.

FIG. 3 shows the operations of the time switch contacts T1 to T9 during a series of processes such as washing, rinsing, and dehydration.

According to the above configuration, in the water supply for the washing process,
The contact T1 is in the ON state, and the pressure switch switching contact T2 is switched to the b side. The pressure switch 13 connected to the b side of the contact T2 is for setting the washing water level, and since the pressure switch 13 is initially on the NC side and the contact T3 for the water supply valve 30 is also on the a side, the water supply valve 30 is activated. When the washing water is supplied to the inner tank 2 and reaches the rated water volume, the pressure switch 13 is turned on.
switches to the NO side. As a result, the timer drive motor 31 is activated, and at the same time, the washing/rinsing (spin-drying) switching contact T4 is set to the a side, and the motor 23 is switched between forward and reverse directions by short-term switching of the contact T6, which switches the motor 23 in reverse. Perform rotation. The movement of the motor 23 is transmitted to the rotary blade 19 via the washing shaft 20 by the action of a washing/dehydrating switching clutch built into the bearing box 21.

Next, when moving to the drainage and dehydration process, contact T
3 is on the b side, and contact T4 is also on the b side. On the other hand, the operating contact T9 of the drain magnet 16 is turned on, so that the water in the inner tank 2 is discharged from the drain port 15 to the outside of the washing machine casing 1 via the water port 6, the water pipe 11, and the drain valve 14. be done. After the time T required for the water in the inner tank 2 to be substantially drained in this way, the operating contact T5 of the brake braking magnet 27 is turned ON.
At the same time or a little later, the contact T7 becomes the b side. Therefore, the motor 23 rotates at a high speed in only one direction, and the movement of the motor 23 is transmitted to the spindle shaft 5 by the action of the washing/spindle switching clutch. Also, as mentioned above, the band brake 28
Then, the brake wheel 26 is separated and the inner tub 2 becomes freely rotatable, so that the inner tub 2 rotates at high speed via the dewatering shaft 5. Therefore, the moisture impregnated in the clothes is dehydrated by the centrifugal force, and the dehydrated liquid is discharged from the upper opening of the inner tub 2 to the outside of the washing machine housing 1 through the outlet 18a provided in the outer tub 18. be done.

On the other hand, looking at the operation of the drainage magnet 16 during this process, after dewatering has started, the inner tank 2
Since the dehydrated liquid inside flows out only in the centrifugal direction, no dehydrated liquid flows into the water passage hole 6 located at the center of the inner tank 2. Therefore, after dewatering has started, no problem will occur even if the operating contact T9 of the drain magnet 16 is in the OFF state.

The reason why the contact T9 is turned on at the end of the draining and dewatering process is to completely drain the residual water that may remain in the water level detection device at the final stage of the process.

Next, the operation when moving to the rinsing step will be explained. When water is supplied, the contact T2 is switched to the a side, and the pressure switch 12 operates as a water level setting switch. This pressure switch 12 is set so that the trip point is less than the rated water flow, so that the water supply during the rinsing process is less than during washing. On the other hand, since the contact T3 has been switched to the a side, the water supply valve 30 is operated and water is supplied into the inner tank 2. At this time, the contact T4 has moved to the b side, the contact T5 has moved to the on state, the contact T9 has moved to the off state, and the contact T7 has moved to the a side, and the contact T8 repeats a short on-off operation. It is configured to return When the water supply operation progresses and the pressure switch 12 is switched from the NC side to the NO side, the motor 23 can repeat intermittently one-way rotation for a short time. The rotation period of the motor 23 at this time is determined by the on-off time of the contact T8. This intermittent rotational movement of the motor 23 is transmitted to the inner tub 2 by the operation of the brake magnet 27 and the action of the washing/dehydrating switching clutch, so that the inner tub 2 performs intermittent rotation. The intermittent rotation period of the motor 23 is designed to prevent the water in the inner tank 2 from overflowing from the upper opening of the inner tank 2 due to centrifugal force.

After the rinsing process as described above is completed, the draining and dewatering processes described above are performed in exactly the same manner as described above, and the series of washing processes is completed.

As is clear from the above embodiments, according to the present invention, 1. Since the dehydration process starts after the water in the inner tank 2 has been almost completely drained by the drainage magnet, By minimizing the residual water in the motor 23, the moment of inertia becomes small, and therefore there is no need to increase the torque of the motor 23, and as a result, the motor can be kept small.

2. By causing the drainage magnet 23 to operate only during the initial predetermined time and final stage of the drainage/dehydration process, wasteful use of power can be prevented.

3 At the final stage of the drainage/dewatering process, the drain valve magnet was operated again to completely drain the remaining water in the water level detection device, so there was no risk of water scale, lint, etc. contained in the remaining water at the water level detection unit. This can prevent pipe clogging and eliminate malfunctions in water level detection.

It is possible to achieve the following effects.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a washing machine for dehydration and dehydration according to an embodiment of the present invention, FIG. 2 is an electrical circuit diagram of the washing machine, and FIG. 3 is a timer program process diagram of the washing machine. 1... Washing machine housing, 2... Inner tank, 5... Dehydration shaft, 14
... drain valve, 16... drain magnet, 23... motor, 26... brake wheel, 27... brake braking magnet, 28... band brake, 30... discharge port, 31... timer drive motor.

Claims (1)

[Claims] 1 The peripheral wall excluding at least the upper end is a non-porous wall,
and an inner tank for dewatering and washing, a water level detection device located in the middle of a passageway from the inner tank to a drain valve to detect water pressure in the inner tank, a motor for driving the inner tank, and fixing the inner tank. The washing machine is equipped with a brake braking magnet for holding the drain valve and a drain valve magnet for controlling the opening and closing of the drain valve, and the inner tub is driven intermittently by intermittent operation of a motor during the rinsing process. In the draining process, after the drain valve magnet starts operating, a predetermined time T is elapsed.
After delaying the dehydration process, the dehydration process is started, in which the brake magnet and motor are activated to rotate the inner tank, and the drain valve magnet is stopped.In the final stage of the dehydration process, the brake magnet and A dehydrating and washing machine that operates the drain valve magnet again after stopping the motor.