JPS62240095A - 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] i) Industrial application field The present invention relates to a washing machine.

(b) Conventional technology Conventionally, a washing machine that omitted rotary blades and carried out effective washing work only by automatically reversing the washing machine was developed in the 1970s.
2-16668.

However, although this type of product is suitable for washing thin items such as underwear as it causes less damage to the fabric, its cleaning power is unsatisfactory for washing thick items. .

(c) Problems to be Solved by the Invention The present invention provides a washing machine with superior cleaning effects compared to conventional washing machines.

(d) Means for Solving the Problems The washing machine of the present invention includes a washing tub in which a wing body is erected on the inner wall, a rotary blade arranged at the bottom of the washing machine, and a water supply to the washing tub. means for rotating the washing tub, means for rotating the rotary blade in a direction opposite to that of the washing tub, and control means for controlling the operation of each of the means, the control means controlling the water supply means. After water is supplied by the washing machine, a first washing process using the rotating means of the washing tub and a second washing process using the rotating means of the rotary blade are performed alternately.

(E) Action: After the washing tub rotates, the rotary blades are rotated in the opposite direction to loosen the twists and tangles of the laundry, and the scrubbing action due to the rotation of the rotary blades is added to the washing action caused by the rotation of the washing tub. This is what I did.

(f) Example Embodiments of the present invention will be described based on the drawings.

In the washing machine shown in Fig. 1, (1) is the machine frame, (2) is the outer tub that is elastically supported by the hanging rod (3) in the machine frame (1), and (4) is the outer tub ( 2), (5) corresponds to the wide tapered inner washing tank installed in the outer tank (2), and (6)... correspond to the above-mentioned washing tank. Inner tank (5)
Dehydration holes (7) provided only in the upper part of the inner tank (
5) A baffle (
(corresponding to the wing body), (8) is a balance ring on the upper part of the inner tank. The inner tank (5) is supported in the outer tank (2) by a cylindrical shaft (9), and the cylindrical shaft (9) and the first drive motor 10) are connected via a pulley (11). are doing. (12) is a rotary blade disposed at the bottom of the inner tank (5), the drive shaft (13) of which passes through the cylinder shaft (9), and the second drive motor (14) and the pulley (15). (16) is the brake drum of the cylindrical shaft (9), (17) is the brake drum l2 of the drive shaft (13), and (18) is the vicinity of the bottom of the outer tank (2). (19) is a water supply device for supplying water between the inside and outside tanks (5) and (2), (20) is an upper lid, and (21) is for detecting the water level in the outside tank (2). This is an air trap installed at the bottom corner of the outer tank (2) for this purpose, and a water level switch (not shown) is connected through the pressure hose (22).<2
3) is a circulation waterway that communicates the drain port (4) with the upper part of the inner tank (5), and (24) is a pump installed in the circulation waterway (23), which pumps up water between the inner and outer tanks; Discharge port (25
) is discharged and supplied into the oil tank (5). (26
) is a drain solenoid valve interposed between the drain port (4>) and the drain hose (27).

FIG. 2 shows a specific circuit diagram, in which (28) is a control device that controls the operation of each load based on inputs from various operation switches (29), and a microcomputer that is the center of control and a microcomputer that is the center of control. A drive circuit is installed to operate each load based on instructions from the computer.

(30) is a safety switch that is linked to the opening and closing of the top cover (20).
(31) is a water supply electromagnetic valve, (32) is a solenoid for operating a brake on the inner tank (5), (33) is a solenoid for operating a brake on a rotating body, and (34) is a pump motor. (35) is a water level switch, and when the water level reaches a specified level, the contact switches from the NC side to the NC side, and at the same time cuts off the energizing circuit to the heater (18).
6) is a thermistor for temperature adjustment, and (37) is a frequency converter that controls the frequency related to the rotation speed of the first drive motor 10), and the rotation speed of the motor (10) is proportional to the height of the frequency. Therefore, 60Hz (50Hz
) to obtain the desired rotation speed.

The operation will be explained based on this configuration.

When a start switch (not shown) is operated, the water supply solenoid valve (31) is opened and water supply between the inner and outer tanks (5) and (2) is started. The water level reaches the specified value and the pressure is inch (35)
When the switch is switched from NO (III) to NC side, the heater (1
8) is cut off and stops heating the water. At the same time, the water supply solenoid valve (31) closes, the pump motor (34) starts operating, and the water between the inner and outer tanks (5 bar 2) is transferred from the discharge port (25) into the inner tank (5).

As shown in Fig. 3, the first drive motor (10) is energized, and the inner tank (5) is rotated clockwise (approximately 1 to 3 seconds) - stopped (approximately 2 to 4 seconds) - counterclockwise ( The rotation of the inner tank is called the first cleaning step), and during this period, the second drive motor (14
), the rotor blade (12) is rotated in the opposite direction to the rotation of the inner tank (5) (if the inner tank (5) was rotating to the right, it rotates to the left; if it was rotating to the left, it rotates to the left). The cleaning process is performed by rotating the rotor to the right (this rotation of the rotor blade is referred to as a second cleaning process). That is, in the cleaning process, the first cleaning process and the second cleaning process are repeated alternately.

During this washing process, the laundry in the inner tub (5) is removed from the inner tub (5).
As the blade rotates, the pan full blade 7) and the rotor blade (12)
), and when the tank stops, the baffle (
7> and the rotor blade (12), thereby cleaning is performed. Then, when the inner tank (5) is stopped, the rotor blade (
By rotating the inner tub (12) in the opposite direction to the rotation of the inner tub (5), the laundry that has become twisted and tangled during the rotation of the inner tub (5) is loosened, and the laundry is scrubbed at the same time.

Here, when the inner tub (5) is stopped, if the power to the first drive motor (10) is simply cut off, the tub (5) will rotate due to inertia, and the direction of this inertial rotation will be Since it is the same as the floating direction of l511. laundry baffle (7)
The impact force against the cleaner is weakened, and the cleaning power is also reduced. Therefore,
At the same time as cutting off the power to the first drive motor (10), the inner tank (
5) Apply a brake to the rotation.

This braking means uses a combination of a conventionally well-known mechanical means for tightening the brake band by cutting off the current to the solenoid (32) and an electric means for applying a direct current to the first drive motor (10). .

In this way, by suddenly stopping the inner tank (5),
The collision force of the laundry against the baffle (7) is increased, and the effect of "pounding washing" is improved.

Furthermore, during the cleaning process, the frequency converter 37) sets the frequency of the voltage supplied to the first drive motor (10) to be 30 Hz, and the number of revolutions of the first drive motor (10) to about 8.
It is controlled to 0 rpm. That is, the inner tank (5) is
The rotation speed of the first drive motor (10) is further reduced to ⅓ by the bobbin and the belt, and the rotation speed is reversed at a relatively low speed of about 27 Orpm.

Therefore, the inner tank can be started with high torque, and the tank can be forcefully reversed against the inertial force and heavy pressure of the platform, thereby improving cleaning power. Furthermore, water splashing can be suppressed by low-speed reversal.

When the cleaning process is completed, a deliquidation process starts for about 30 seconds to 1 minute by rotating the inner tank (5) clockwise at high speed. In other words, as the inner tub rotates at high speed, the washing liquid in the tub flows through the dewatering hole (6) along the tapered shape of the tub due to centrifugal force.
・The liquid is completely discharged from the upper opening of the tank, and the liquid removal is completed.

In this dewatering step, dirt is separated from the laundry and removed by passing the laundry liquid between the fibers of the laundry at high speed.

Furthermore, during this dewatering step, the frequency converter (
37) starts the inner tank with high torque by setting the startup voltage at a frequency of 30Hz, and then gradually increasing the frequency linearly to 4
0 Hz, 60 Hz...100 Hz, and the rotation speed of the inner tank (5) is gradually increased accordingly, and finally reaches about 1100 Orp.

In this way, when the frequency is increased step by step using the frequency converter (37), as shown in FIG. 4, the predetermined rotational speed is reached faster than before (the rise characteristics are good). The dehydration time can be reduced accordingly.

Particularly in the case where the washing step and the dewatering step are combined like this example, shortening the dewatering step time is more effective.

In addition, in the same figure, the dotted line shows the rotational characteristics of the conventional dehydration tank, when the power supply frequency is 60 Hz (50 Hz>).

Now, the discharged washing liquid is stored between the inner and outer tanks (5) and (2), and this washing liquid is returned to the inner tank (5) by the pump (24) at the same time as the second wash. Washer S
(approximately 1-3 minutes).

Thus, the washing process and the dehydrating process are repeated twice,
During the final liquid removal step, the drain valve (26) is opened to drain the washing liquid, and the "washing" of the laundry is completed.

Here, in this embodiment, the frequency converter (37) changes the frequency of the voltage applied to the motor during the cleaning process and the dewatering process, rotates the inner tank at low speed during the cleaning process, and rotates the inner tank at a low speed during the cleaning process. Sometimes the inner tank is rotated at high speed. Therefore, the structure is simple because there is no need for a power transmission mechanism that decelerates the rotation of the motor during low-speed reversal and transmits the rotation as it is without decelerating during high-speed rotation, as in the prior art.

Furthermore, since a three-phase induction motor is used as the drive motor, the motor is smaller than the conventionally used single-phase induction motor.

Hereinafter, "rinsing" is carried out by performing the same operation as the above-mentioned "washing" with fresh water, and "dehydration" is completed by carrying out the above-mentioned liquid removal step for about 3 minutes.

As described above, according to the washing machine of this embodiment, as shown in FIGS. 5 and 6, an exceptional cleaning effect was obtained compared to the conventional one. , the dashed line represents the characteristics when only the inner N (5) is rotated while the rotor blade (12) is stopped, and the dotted line represents the characteristics when the rotor blade (12) is stopped and only the inner N (5) is rotated.
12) is not provided and the inner tank (5) is allowed to rotate.

Incidentally, the cleaning rate is as follows, and it can be said that the higher this rate is, the better the cleaning performance is. In addition, the washing unevenness ratio is a statistical calculation of the degree of cleaning after washing multiple contaminated cloths attached to the original cloth.
It can be said that the lower this ratio is, the less uneven washing is, and the washing is more uniform.

In addition, as another embodiment, the rotor blade (12) is connected to the inner tank 5.
By inserting a rotation in the same direction as the rotation in the washing process, it is possible to change the movement of the laundry.

FIG. 7 shows an embodiment of the rotary blade pond, and as shown in the figure, it may be circular, low pitched, or rectangular.

(G) Effects of the Invention The washing machine of the present invention untwists and untangles the laundry by rotating the rotor blades in the opposite direction after the washing tub rotates, and further rotates the washing machine in a push washing operation by rotating the washing tub. The scrubbing action of the rotating blades can be added, and the cleaning effect is superior to that of conventional products.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional diagram of the main parts of the internal mechanism during washing in the present invention, Fig. 2 is a detailed circuit diagram of the same, Fig. 3 is a time chart showing the operation, and Fig. 4 is a diagram of the dehydrating process. The rotation characteristic diagram of the tank, Figures 5 and 6 are cleaning characteristic diagrams, and Figures 7 (a) to (
c) is a side view showing another embodiment of the rotary blade. (5)...Inner tub (washing machine), (7)...Baffle (
wing body), (10)...first drive motor (rotating means of the washing tub), (12)...rotor blade, (14)...second drive motor (rotating means of the rotor blade), ( 28)...control device (control means), (31)...water supply solenoid valve (water supply means). Figure 1 Figure 3 Figure 4 Figure 5 □ Road t: Riki! Figure 6 (c) Ninigo [22

Claims (1)

[Claims] (1) A washing tub with blades erected on the inner wall, a rotary blade disposed at the bottom of the washing tub, a means for supplying water into the washing tub, a means for rotating the washing tub, and a rotary blade installed at the bottom of the washing tub. The washing tub includes rotation means in a direction opposite to that of the washing tub, and control means for controlling the operation of each of the means, and the control means is configured to perform a first washing step by the rotation means of the washing tub after water is supplied by the water supplying means. and a second washing step using the rotation means of the rotary blades are performed alternately.