JPS62137096A - Cloth offset preventing washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a one-tank centrifugal dehydrating washing machine that prevents dehydration vibrations from increasing due to unbalanced cloth.

2. Description of the Related Art Conventionally, a single-tank centrifugal dehydrating washing machine has a washing/dehydrating tank 2 inside an outer tub 1, as shown in FIG.

This washing and dewatering tank 2 has a pulsator 3 on the inner bottom and a large number of small holes 4 for draining water on the side wall.

To 2-1: The mechanical case 6 provided at the bottom of the outer tub 1 rotates only the pulsator 3 during washing, and rotates the washing and dehydrating tub 2 during dehydration. The rotation of the υ motor 6 is transmitted to this mechanical case 5 through a belt 7 and a pulley 8. The drain valve 9 of the outer tank 1 and the brake arm 1o are pulled by a solenoid 11. A motor 6, a mechanical case, etc. are disposed on a support plate 12 of the outer tank 1, which is suspended from an exterior body 14 by a rod 13. 15 is a balancer installed at the top of the washing/dehydration tank 2, 16 is a drain hose, 17 is an opening/closing lid on the top surface, and 1
Reference numeral 8 denotes an upper exterior body on which electrical components (not shown) are installed that control a series of processes of the washing machine. 19 is a part of the electrical components; a switch for detecting the movement of the outer tank 1; and 2o.
is the lever that conveys that movement.

Based on the above configuration, the operation of preventing cloth from shifting in a conventional washing machine will be explained.

During the washing and rinsing processes, in order to correct the fact that the fabric is skewed in the washing and dehydrating tank 2, just before the end of the washing and rinsing processes, the pulsator's reverse rotation cycle is changed to the normal washing cycle for a certain period of time. By shortening the cloth from % to %, it is possible to loosen the cloth that is lopsided in the - place.

Problems to be Solved by the Invention As shown in Figure 4a, the rate of occurrence of unbalance in a single-tank centrifugal dewatering washing machine due to the shifting of the cloth during washing is as shown in Figure 4a, when the water level is low and the amount of cloth is small, In other words, in a washing machine with a rated cloth capacity of 3.6 and 9, ○65 and 2 are 3 degrees, and 160 and 9 are 2
It is 2%. Also, 7% at the rated 3,6 K9 high water level.
and is low. This is because if the amount of cloth is small in a certain space of the washing and dehydrating tank, it will receive a lot of rotational centrifugal force from the pulsator, and the cloth will not be able to move around easily, and the cloth will tend to stick together, so it will tend to get messy. Therefore, the probability that it will be biased towards - is high. On the other hand, when the amount of cloth is rated, the amount of cloth that occupies the washing and dehydrating tank is large, so there is no space for it to be lopsided, and the surroundings of the cloth itself are also poor, so there is less chance of the cloth getting tangled and the probability of it being lopsided. However, although there is a tendency for the conventional cloth to be prevented from shifting to a certain extent to be slightly better, the rate of occurrence of unevenness when the amount of cloth is small, as shown in the upper part, is not very good. In other words, even if the reversal period of the pulsator is shortened, if the rotational speed of the pulsator remains the same, the cloth that is lopsided due to the eaves will only change its position, and there will be no damage if it comes apart.

In view of the above problems, the present invention provides a washing machine that prevents cloth from shifting even when the amount of cloth is small.

Means for Solving the Problem In order to solve this problem, the washing machine for preventing cloth from shifting according to the present invention performs washing using a water stream in which a pulsator is rotated at a lower speed than the normal rotation speed.

Function: After washing for a certain period of time at a normal pulsator rotation speed, just before the end of washing, the pulsator is moved at a low rotation speed for a short period of time to remove tangled and uneven fabric.
The pulsator's water flow has a low centrifugal force, and although it cannot remove tangled cloth, the vibration of the small water flow can break up lopsided piles of cloth, reducing the possibility of vane balance.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to FIGS. 1 to 6.

In Figure 1, in the process of performing a series of washing, washing process 2
Before the end of Step 1, the offset correction water flow 22 with a reduced rotational speed of the pulsator is introduced, and also in the rinsing step 23,
A bias correction water flow 22 similar to the above is inserted.

2 and 3 show examples of motor control for reducing the rotational speed of the pulsator, where 101 is a commercial power source and 112 is a DC power source.

Commercial power supply 101 connects resistor 111. is applied to the transistor 109 through the diode 110, and the transistor 109
is designed to be switched in synchronization with the commercial power supply. 108 is a collector resistor of the transistor 109, and the pulse signal from the transistor 109 is input to the microcomputer 107. The microcomputer 107 has a control section that counts the power synchronization signal six times and controls the motor 102 for each -number of needle indications. 102 is a motor; 103 to 106 are circuit elements constituting a motor drive circuit 108; the output of the microcomputer 107 is applied to a transistor 105 via a resistor 106 to switch the transistor; Semiconductor switching element 10
3'i switching to control the motor. As shown in FIG. 3, the microcomputer 107 continuously energizes the motor until the count value of the initial power synchronization signal for the motor rotation head reaches a certain number (No), and when the count value reaches a certain number (No). , the initial FLCi is set to 1'', and thereafter the count value is reset to ``0'' every time the count value reaches a constant value N1, and when the count value reaches the constant value N1, the motor is not energized when the count value is less than N2. The motor is stopped, and the motor is energized at N2 or above.In other words, the rotating head is energized continuously for a certain period of time at the beginning, and thereafter the motor is energized intermittently in synchronization with the power synchronization signal.

In the above, N1-4. By setting N2-2, the rotational speed of the motor can be set to about 7% of the normal speed, resulting in an offset correction water flow that reduces the rotational speed of the pulsator.

According to the embodiments described above, when the misalignment correction water flow is introduced before the end of washing, the unevenness occurrence rate is as shown in Fig. 4 bK f, when the amount of cloth is 0, 5, K9 and 1, 0 to 9%, 2
．． It is 10% for 0 to 2, 7% for rated 3.6 to 9, and when compared with the conventional unevenness rate, it is 6% for 0.5 to 9 and 6% for 30 to 1. In ○ to 9, the occurrence rate of 6-chi and 24% to 16-ch is decreasing from 22%.

As shown in Figure 5a, when the amount of cloth is small and the water level is low, in the conventional unbalanced state, the water is unbalanced in the - position, but by introducing the unbalanced water flow before the end of washing, the unbalanced water flow can be adjusted. The piles 21 become evenly distributed piles 22, which eliminates unbalance.6 On the other hand, when the amount of cloth is large and the water level is high, there is not much space in the tank 23, as shown in Figure 5. The deviation state can be left as it was before, and the incidence of imbalance is also low.

Effects of the Invention As described above, according to the present invention, since the pulsator is rotated at low speed for a certain period of time before washing and rinsing are completed, unevenness has conventionally occurred quite frequently.

Even under conditions where the amount of cloth is small, the rate of occurrence of unbalance can be kept low, and dehydration vibration can be reduced accordingly, resulting in low vibration and low noise effects.

[Brief explanation of drawings]

Fig. 1 is a washing process diagram of an embodiment of the present invention, Fig. 2 is a circuit diagram of a motor control device of the present invention, Fig. 3 is a flowchart of the microcomputer of the same device, and Fig. 4 is a comparison graph of unevenness occurrence rate. , FIG. 5 is a state diagram of the tank and the cloth being shifted to one another, and FIG. 6 is a longitudinal sectional view of the single-tank centrifugal dewatering washing machine. 22...Occurrence correction water flow, 100...
Commercial power supply synchronization generator, 102...Motor, 10
7...Microcomputer, 108...
Motor drive circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
A detour Nio,, 2f! −
--)+Yorisone 1 Seishui Suhyo 2Figure 3Figure 4 (a) (b) Figure 6

Claims (1)

[Claims] The washing and dehydrating tub includes a pulsator disposed at the inner bottom, a motor for rotating the pulsator, and a control circuit for controlling the number of rotations of the motor. A washing machine that rotates a pulsator at low speed to prevent fabric from shifting.