JPS6164284A - 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 (a) Field of Industrial Application The present invention relates to a washing machine that rotates rotary blades provided in a washing tub at short intervals in a predetermined order from side to side.

(b) Conventional technology This type of washing machine these days has moved away from the conventional washing machine that rotates the rotor blades at high speed for a long time to achieve a high cleaning rate, and instead washes at a low speed and intermittently from side to side for a short time. Nowadays, clothes are being replaced by rotating ones that minimize damage to clothing. The latter example is shown in, for example, Japanese Patent Laid-Open No. 17390/1983, and will be explained based on FIGS. 3 to 6.

(1) is a washing tub that also serves as a dehydration tank, and has a large number of dehydration holes (2) on its peripheral wall, and a balance ring (3) on its rim.
) is installed. A rotation R (4) is disposed at the center of the bottom of the washing tub (1). The washing tub (1) is provided in an outer tub 5), and a drive motor (6) is installed at the bottom of the outer tub (5) to rotate the washing tub (1) and the rotary blades (4).
), a drive mechanism (7) with a flange, a brake device, etc.
The outer tank (5) is suspended from the upper part of the machine frame (8) by a plurality of hanging rods (9) in a vibration-proof manner.

The rotary blade (4) has a large diameter circular base (1
0), a substantially triangular prism-shaped protrusion (11) that gradually protrudes from the periphery of this base (10) toward the center, and a protrusion that protrudes from each pentagonal apex of this protrusion toward the periphery of the base (10). Each blade (
12) is deflected in a gentle curve in the same direction (rightward in the figure) toward the periphery of the base <10), as is clear from FIG. The height H) of the protrusion <11) is approximately 1/2 of the outer diameter (d) of the circular base <10). ! The height of the water surface in I(1) is set to be lower than h). In the example, washing? I box (
The inner diameter (D) of 1) is -400 [m], the outer diameter (d) of the circular base (10) = 320 [n1Tl], and the height H) of the protrusion (11) = 140 [mm].

A substantially triangular prism (13) at the top with a one-step diameter JS diameter is formed at the top of the protrusion <11). As shown in FIG. 6, the slope (θ2) of the side surface of this triangular prism (13) is gentler than the slope (θ1) of the upper end of the side surface of the larger diameter triangular prism (the protrusion (11)) below it. In the example, (θ2)-12' and (i)-8°.

In the figure, (14) is a boss that fits with the top of the wing shaft (15).
It is inserted into a boss (16) provided on the back side of the top of the rotor blade. The rotor blade (4) is attached to the blade shaft by tightening the attachment (17) to the top of the RJitb (15).

The rotor blade (4) can rotate left and right alternately, but its rotation speed is 450 [r, p, m] to 450 [r, p, m] of the conventional rotor blade.
The ratio is lower than 720 [r, p, to] to 300 [r,
Keep it below p and m. The example is about 1
80 [r, p, a+]. and to the right 1
A reversal cycle in which the same single period of rotation is repeated for 2 seconds to 2 seconds, then paused for 0.5 seconds to 1 second, and then rotated to the left for 1 second to 2 seconds is repeated during the set time. Also, during this rotation, even if the water level in the washing tub (1) becomes lower in the center as shown by the dashed line in Figure 4 due to the rotation of 1 N (4), the protruding portion (11 N) This is a value that does not decrease.

In such a washing machine, when water is supplied to the washing tub (1) and a cloth (C) is put therein, and the rotor blade 4) is rotated, the cloth is placed at the bottom of the rotor blade 4) in the same way as the conventional rotor blade. A water flow is generated to rotate the cloth in the horizontal direction, and the triangular prism-shaped surface of the protrusion (11>) and the blades (12) at the top of the rotor blade apply a force that causes the cloth to rise and fall.As a result, the cloth moves in the direction of the arrow in Figure 3. The washing machine sinks along the side wall of the washing tub toward the rotary blade, and then rotates in the horizontal direction while floating up along the triangular prism-shaped protrusion (11).

In particular, the three blades (12) of the rotor blade are deflected in a gentle curve in the same direction (to the right) as shown in Figure 5, so the water flow generated by the rotation of the rotor blade (4) is directed to the left and right. There is a difference between the rotation and clockwise rotation, which creates a stronger water flow that lifts the cloth upwards. This is because turning to the right applies a stronger force to the water, which causes the water to hit the wall of the washing tub more strongly, causing a flow of water that floats up due to the reaction. This results in vertical movement of the cloth.

Since the protrusion (11) is placed below the water surface, the cloth that has floated up can easily climb over the protrusion (11), resulting in a large movement. At this time, the protrusion (11
) is not cylindrical but triangular prism-shaped, so this protrusion generates a stream of water that tries to drive the cloth around, preventing the cloth from getting entangled in the protrusion.

Particularly in this case, the top of the protrusion (11) is formed with a substantially triangular prism (13) with a smaller diameter by one step, so that the upper end of the protrusion (11) with a larger diameter and the top with a smaller diameter are formed at the top of the protrusion (11). Due to the approximately triangular prism (13), turbulent flow is generated in this area, and the cloth becomes more entangled in this area.
In addition, since the angle of inclination of the upper end of the side surface of the protrusion (11) is <θ1><the angle of inclination of the side surface of the top approximately triangular prism (13) (02>), it becomes easier for the cloth to pass over the rotating μ(4). Become.

In this way, in the conventional example, clothes are less likely to get tangled during washing, so there is less damage to the fabric due to tangles, and the rotary blade (4)
Since the rotation speed is low, there is little damage to the fabric even with only part 11.

However, although the conventional example of refusal causes less fabric damage, the rotation speed of the rotor blade (4) is very low, so it is difficult to move the clothes clearly from the beginning of the set time, and underwear is particularly susceptible to damage. When the rotation time is shortened in order to softly wash clothes such as clothes, the movement of the clothes is noticeably reduced.This gives the user a feeling of anxiety that the clothes cannot be washed properly.

(c) Problems to be Solved by the Invention The present invention activates the movement of clothing from the beginning of a set time by rotating the rotor blade irregularly.

(d) Means for solving the problem The feature of the present invention is the reversal cycle of the rotor blade, and this reversal cycle is made by setting almost the same rotation time in one direction of the blade, and setting approximately the same rotation time in one direction of the blade, and It is made by changing the length of rotation time.

(e) Effect: In other words, to the fixed water flow caused by rotation in one direction, a water flow caused by changing rotation in the other direction is added to produce a pulsating flow as a whole, thereby increasing the movement of the clothing.

Example) The basic shape of the washing machine according to the present invention is the same as that of the conventional example shown in FIGS. During the rinsing process, the rotor blades are rotated in a reversal cycle stored in the micro-fump computer. For details, about 18 Or,
At rotation speeds of p and m, the rotation time is intermittently rotated left and right for a maximum of 3 seconds and a minimum rotation time of 0.3 seconds, with an appropriate pause time within 0.5 seconds.

In the fully automatic course, as before, water supply - washing - drainage - intermediate dehydration - water supply - 1st rinse - drainage - intermediate dehydration - water supply - 2nd
A process of rinsing, draining, and final dehydration is performed, and the rotary blades are intermittently reversed during each of the first and second rinsing processes. The times required for the washing process, first rinsing process, second rinsing process, and intermediate and final dehydration processes can be freely set in advance.

Thus, the reversal cycle (one cycle) of the rotor blade (4) during the washing and rinsing steps is shown in the time charts of FIGS. C) (2) This reversal cycle is one in which the left and right rotation times are arranged alternately with a pause time of 0.2 seconds, and the right rotation times are all 1.2 seconds or 0,
It is 4 seconds long. On the other hand, the left rotation time is 1.2 seconds-1,
0 seconds → 0.8 seconds → 0.6 seconds → 0.4 seconds - 0.6 seconds → 0.
The length varies from 8 seconds to 1.0 seconds. That is, the clockwise rotation time can be set to the longest (1, 2 seconds) or the shortest (0, 4 seconds) of the left rotation time, or a pre-stored intermediate (not shown) (for example, 08 seconds).
This is a reversal cycle (one cycle) in which the counterclockwise rotation time is fixed at 2 seconds) and the counterclockwise rotation time is changed stepwise from the longest to the shortest and then to the longest.

Therefore, if this reversal cycle is repeated during the set time, the water flow due to left rotation will change in strength depending on the time change, and the time difference between adjacent clockwise rotation times will continue to occur as this change in strength, which will reduce the overall water flow. 6 In addition, when the clockwise rotation time is the longest (12 seconds), the water flow due to counterclockwise rotation has a small contribution to the overall water flow, so the water flow due to clockwise rotation, that is, the torsion of the blades, is strong in the vertical direction. It is said that the water flow can be pulsating, and the movement of clothes and cleaning power are great. and,
When the clockwise rotation time is the shortest (0.4 seconds), the water flow due to clockwise rotation has a small contribution to the overall water flow, so the water flow due to counterclockwise rotation is generated in synchronization with the time change, and the water flow is gradual. It will pulsate. Furthermore, the clockwise rotation time is intermediate (
For example, the total water flow is dominated by the water flow caused by left rotation at the beginning and end of the reversal cycle, but is dominated by the water flow caused by right rotation in the middle of the cycle. However, since the difference in rotation time between adjacent left and right pairs is smaller than in other cases, the pulsation itself is small.

In this way, in this embodiment, when the set value of the clockwise rotation time changes, water flow due to left and right rotation tends to occur in response to the change, so the movement of clothing due to pulsation becomes active, and the water flow similar to a whirlpool causes Substantial cleaning power is improved.

Furthermore, since the set value of the clockwise rotation time can be variably adjusted to select the water flow, washing method, and strength of cleaning power, it is possible to widely correspond to the amount and type of clothes to be washed. The selection operation to decline is executed by turning ON-OFF the selection switch provided on the operation surface.

Time charts in FIGS. 2(a) and 2(b) show an example of oil in a reversal cycle, and FIGS. 2(c) and 2(d) show changes in the intensity of the water flow formed thereby. In this reversal cycle, the left and right rotation times are similarly arranged alternately with a rest time of 0.2 seconds, and the right rotation times are all 12 seconds or 0.
It is 4 seconds long. On the other hand, the left rotation time was 12 seconds.
The length changes from 0 seconds → 08 seconds → 06 seconds → 04 seconds. That is,
Change the clockwise rotation time from the longest left rotation time (1.2 seconds) to the shortest (
This is a reversal cycle (1 cycle) in which the counterclockwise rotation time is allowed to change stepwise from the longest to the shortest while being fixed between 0 and 4 seconds). Incidentally, this reversal cycle, including the previous embodiments, may start from the shortest time of left rotation.

In the case of this second embodiment as well, if the reversal cycle is repeated during the set time, the strength of the water flow due to counterclockwise rotation will change depending on the time change, and the time difference between adjacent clockwise rotation times and its changes will be added, so that the overall The water flow can be made into a pulsating flow. Also, if the clockwise rotation time is the longest (1, 2 seconds), the shortest (0, 4 seconds)
seconds), and in the middle (e.g. 0.8 seconds), the first
As in the embodiment, the overall water flow is formed depending on the difference in the length of the left and right rotation times. In the case of this second embodiment, the counterclockwise rotation time changes suddenly from the shortest to the longest when transitioning from one reversal cycle to the next, so the strength of the water flow clearly occurs at this time, and the clothes are also washed away violently. This movement occurs every time the reversal cycle changes, indicating to the user whether the strength of the water flow is appropriate, improving the washing effect, and further improving the washing effect to the user! 2 knowledge can be transferred. This effect is particularly effective when the shortest time (<0.4 seconds) at which the overall water flow becomes weak is selected. Further, in this second embodiment as well, the set value of the clockwise rotation time can be selectively changed in the same way as in the first embodiment, so that it can be applied to a wide variety of washing applications.

Other embodiments include changing the constant rotation time to the left rotation side, setting the constant rotation time beyond the maximum (1 or 2 seconds) or the shortest (0 or 4 seconds), or an intermediate time. It is conceivable that the rotation time should be set to something other than 0.8 seconds, and even though it is a constant rotation time, each rotation time can vary within a small range.Also, each left and right rotation time can be divided into small parts, and the rotation in one direction can be divided into rest periods. It is also possible to continue the cycle by sandwiching the clockwise rotation time.Furthermore, the reversal cycle in which the clockwise rotation time is almost constant is set as 172 cycles,
After that, 172 reversal cycles with almost constant left rotation time are performed.
A new reversal cycle may also be considered.

(G) Effects of the Invention According to the present invention, by adding changes due to the difference in left and right rotation times to changes in water flow in one direction, the entire water flow can be made into a pulsating flow, and in particular, it is possible to make the entire water flow into a pulsating flow. It is possible to generate a stream of water, and the clothes can be efficiently washed, and the movement of the clothes can be shown to the user by being actively moved from the beginning.

Therefore, it is possible to provide a practical washing machine that has strong cleaning power both in appearance and in reality.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are time charts of the reversing cycle of the washing machine according to the present invention, Figures (c) and (d) are diagrams of changes in water flow intensity, and Figures 2 (a) and (b) are implementations of the pond. The time chart of the reversal cycle in the example, Figures (C) and (D) are also diagrams of changes in water flow intensity, Figure 3 is a vertical cross-sectional view of the whole of the present invention and the conventional example, and Figure 4 is the same essential point. FIG. 5 is a plan view of the rotor, and FIG. 6 is an enlarged longitudinal sectional view of the rotor.
It is a sectional view based on the B line. (1)...Dehydration/washing tub, (4>...Rotary blade.

Claims (3)

[Claims] (1) In a washing machine in which rotary blades provided at the bottom of the washing tub are rotated from side to side in a predetermined order at short intervals, the rotation time of each direction of the rotor blades is set to be approximately the same, and , a washing machine characterized by having a reversal cycle in which the rotation time in the other direction is set by varying the length and shortness of the rotation time. (2) The washing machine according to claim 1, wherein the rotation times in the other direction during the reversal cycle are arranged in order of long or short and then arranged in reverse order. (3) The washing machine according to claim 1, characterized in that the rotation times in the other direction during the reversal cycle are arranged in a line in order of longer or shorter rotation times.