JPS6141499A - 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 rotor blades provided at the bottom of a washing tub at low speed and in a short period of time.

(b) Conventional technology Nowadays, this type of washing machine 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 rotates at a low speed and in a short time, especially when washing from side to side. Nowadays, clothing is replaced by one that rotates it intermittently to minimize damage to clothing. An example of the latter is shown in, for example, Japanese Patent Laid-Open No. 17390/1983, and will be explained based on FIGS. 2 to 5.

(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 rotary blade (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 rotation H (4).
), a drive mechanism (7) that includes a clutch, a brake device, etc.
is attached, and 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 (10
), a substantially triangular prism-shaped protrusion that gradually protrudes from the periphery of this base QO) toward the center), and a substantially triangular prism-shaped protrusion that protrudes from each vertex of the triangle of this protrusion toward the periphery of base α [ It is composed of a blade 021. As is clear from FIG. 4, each blade a2 is deflected in a gentle curve in the same direction (rightward in the figure) toward the periphery of the base frame. The height H) of the protrusion (11) is the outer diameter (
d) and the height of the water surface of the washing tub (1) h)
It is set to be lower. In the example,
The inner diameter (D) of the washing tub (1) = 400 (T), the outer diameter (d) of the circular base 0 (320 (m)), and the protrusion (height H of 111) = 140 (Ig). be.

At the top of the protrusion circle, a substantially triangular prism with a smaller diameter is formed at the top. The slope (θ2) of the side surface of this triangular prism (131) is the slope (θ,) of the upper end of the side surface of the large diameter triangular prism (the protrusion (11)) below it, as shown in
It's becoming more gradual. In the example (θ2)−
1f, (θ,)=♂. In the figure, I is a boss that fits with the top of the blade shaft (151), and is a boss (151) provided on the back side of the top of the rotor blade.
61 is inserted. The rotor blade (4) has a wing axis a9
It is attached to the wing shaft by tightening the mounting screw αη at the top.

The rotation N(4) is rotated alternately left and right, and the number of rotations is from 450 [r-p·m] to 72, which is the number of rotations of a conventional rotor blade.
0 [r-p-m], it is suppressed to less than 30Of''r-p-m.
m]. Then, a reversal cycle consisting of the same single cycle of rotating to the right for 1 to 2 seconds, stopping for 0.5 to 1 second, and rotating to the left for 1 to 2 seconds is repeated during the membrane chamber time. I'm going to make it. Moreover, even if the water surface in the washing tub (1) becomes lower in the center part due to the rotation of the rotor blade (4) as shown in the dashed line in FIG. This is a value that will 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 rotary blade (4) is rotated, the cloth is collected at the lower part of the rotary blade (4) in the same way as the conventional rotary blade. A water flow is generated to rotate the cloth in the horizontal direction, and at the top of the rotor blade, the triangular prism-shaped surface of the protrusion α9 and the blades (Lz) apply a force to raise and lower the cloth.As a result, the cloth is washed as shown by the arrow in Figure 2. It sinks along the side wall of the tank toward the supporting rotor, and then rotates in the horizontal direction while floating up along the triangular prism-shaped protrusion (II).

In particular, since the three blades (121) of the rotor blade are deflected in a gentle curve in the same direction (toward the right) as shown in Figure 4, the rotation of the rotor blade (4) causes water flow on the left and right sides. There is a difference in the amount of water, and when rotating to the right, the water flow is stronger and lifts the fabric upwards.This is because rotating to the right applies a stronger force to the water, so it hits the washing tub wall more strongly and the fabric floats up due to the reaction. As a result, the fabric moves up and down.

Since the protruding part (11) is placed below the water surface, the cloth that floats up becomes easy to climb over the protruding part 1, resulting in a large movement. At this time, the protrusion [
Since 11) is not cylindrical but triangular prism-shaped, this protrusion generates a water flow that tries to drive the cloth to the surrounding area, thereby preventing the cloth from getting entangled in the protrusion.

Particularly in this case, the top of the protrusion aυ is formed with an apex substantially triangular prism (13) with one step smaller diameter, so that the upper end of the large diameter protrusion αB and the small diameter apex substantially triangular prism 0 are formed at the top of the protrusion aυ.
3, a turbulent flow is generated in this area, and the cloth becomes more entangled in this area, and the inclination angle (θ, ) of the upper end of the side surface of the protrusion aυ is less than the side inclination of the top approximately triangular prism 0. Since the angle (θ2) is formed, it becomes easier for the cloth to pass over the rotor blade (4).

In this manner, in the conventional example, since clothes are less likely to get tangled during washing, there is less damage to the cloth due to tangles, and since the rotation speed of the rotary blade (4) is low, there is less damage to the cloth.

In such a conventional example, the lower part of the rotor blade (4) rotates the clothing horizontally, and the upper part moves it up and down, moving the clothing up and down significantly, but the rotor (4)
4) Since the rotation speed is very low, it is difficult to move the clothes up and down from the beginning of the set time. Therefore, the movement of the clothes appears to the user to be poor, giving the impression that the clothes cannot be washed.

(c) Problems to be Solved by the Invention The present invention promotes the vertical movement of clothing from the beginning of the set time.
It is something that activates people.

(b) Means for solving the problems The present invention (d) comprises a reversal cycle in which each pause period between rotation times is periodically varied.

Further, the present invention includes a reversal cycle in which the rotation time is alternately rotated left and right, and the time of each rotation is periodically changed so that as one rotation time increases, the other rotation time decreases.

Further, the present invention includes a reversal cycle in which the left and right rotation times and rest times are periodically changed, and the longest rotation time is placed adjacent to the longest rest time.

(e) Effect: Because the rest time changes, the degree of persistence of the rotating water flow before the rest time differs, and the water flow generated during subsequent rotation also differs. The water flow before and after the rest period changes, creating an effect similar to that of a pulsating flow. Therefore, the movement of the clothes changes noticeably, and the cleaning effect is substantially improved.

In addition, when the left and right rotation times increase and decrease periodically, the water flow due to one direction rotation gradually becomes stronger and the other water flow becomes weaker, and in addition to the action of a pulsating flow, the action of a one-way swirling water flow is obtained, resulting in a synergistic effect. The effect further promotes changing clothes.

Furthermore, if the longest rotation time is placed next to the longest rest time,
Since the water flow generated during the rotation time is sustained, clothes that become tangled during the long rotation time are loosened in this loose inertial water flow. In addition, after eliminating most of the inertial water flow in one direction during a long pause, the longest rotation in the other direction is started with less resistance.
Stir the clothes thoroughly to replace them effectively.

(F) Embodiment 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 washing and rinsing steps, the rotor blades are rotated in cycles stored in the microcomputer. For details, about 18 Or, p, m
It rotates intermittently to the left and right for a maximum of 3 seconds with an appropriate rest period in between.

In the fully automatic course, as before, 1 water supply → washing → drain → intermediate dehydration → water supply → 1st rinse → drain → intermediate dehydration → water supply → 2nd
A process called rinsing and draining → final dehydration is executed, and during this process, the rotor blades are intermittently reversed during each of the first and second rinsing processes. The time required for the washing process, the first rinsing process, the second rinsing process, and the intermediate and final dehydration processes can be freely set in advance. Also, during the rinsing process, water injection rinsing can be set at any time.

In the case of washing, each water stream is created by repeating the inversion cycle as shown in FIG. In the figure, each rotation time is TI<T2<T3<T4, and the rest time is T o
1<T o t<'I'on<T. 4, and these values depend on the desired water flow, and T4 is set to a maximum of about 3 seconds, and To4 is set to a maximum of about 1 second.

Further, the sum of the left and right rotation times calculated in a single cycle, ie, right rotation integrally stopped and left rotation integrally stopped, is constant or almost constant for each single cycle. That is, in the figure, TI +T4=T2
+T3 or TI+T4+T2+T3.

The reversal cycle is a collection of multiple single cycles mentioned above, and the clockwise rotation time is sequentially T2 → T3 → T4 → from T1 with the shortest clockwise rotation time.
Changes from T3 to T2, starting with T4, which has the longest counterclockwise rotation time, then
It changes as 3→T2→T1→T2→T3. That is, one time increases and then decreases, and the other time decreases and then increases synchronously, and the directions of increase and decrease will align, while the rest time (T, , ) is the same as that of the reversal cycle. The maximum pause time T between the initial minimum clockwise rotation time T and the maximum counterclockwise rotation time T4. , is placed, and at each pause below, Tow″T
ow″To s′:+To t″I’os″To4
``To3''T. 1-+ T o, → T'ot → Tos, that is, it decreases and then increases, and then decreases and then increases. As a result, the longest pause time T. 4 is placed before the longest left rotation time T4 and after the longest right rotation time T4.

In the washing process, the above reversal cycle is repeated multiple times during the set washing time. For this reason, the water flow generated by the rotor (4) differs in the degree to which it is sustained within the rest time, and the resistance to the next water flow generated varies depending on the sustained time.

Therefore, the water flow appears like a pulsating flow, and its action moves the clothes well.

Further consideration shows that the influence of the first clockwise rotation time T1 is T. 4
After being extinguished by , a strong water flow is created in the left direction by the longest counterclockwise rotation time T4, where the clothes are often replaced due to the influence of the strong swirl.

During the next clockwise rotation time T2, the water flow in the left direction continues, resulting in a weakened clockwise rotation water flow, and during the counterclockwise rotation time T3, the left rotation water flow can also be made relatively strong. Therefore, up to this point, the left-turning water flow is relatively strong. Subsequently, at the next clockwise rotation time T3, the counterclockwise rotation water flow is gradually weakened, and the counterclockwise rotation time T3 is gradually weakened.
2 and rest time T. From the longest clockwise rotation time T4 after passing through , the clockwise rotation water flow becomes stronger and the pause time T. It is maintained at 4. Then, the influence of the shortest counterclockwise rotation time T1 is the rest time T. At clockwise rotation time T3 after almost disappearing at 8, the clockwise rotation water flow is strong. Therefore, the clockwise water flow is relatively strong here. That is, the strength of the water flow generated at each rotation time varies greatly depending on the length of the rotation time and the length of the rest time before and after the rotation time, and the water flow pulsates as a whole.

Furthermore, there are times when the left-handed water flow is strong and times when the right-handed water flow is strong, and during those time periods, the action of a unidirectional swirling water flow is also obtained, creating a synergistic effect with the pulsating water flow.

The longest pause time T before the longest left rotation time T4. ,teeth,
Most of the inertia of the previous clockwise rotation water flow is eliminated, and the left rotation water flow at the left rotation time T4 is made to rise with less resistance. Further, the longest pause time TO4 after the longest clockwise rotation time T4 acts to loosen clothes that tend to get tangled during the longest rotation time in the inertial water flow.

Note that the pause time is T in this embodiment. In addition to changing the
Although the rotation time T is also varied, the rotation time may be constant within a range where the effect of pulsating flow occurs.

(G) Effects of the Invention According to the present invention, the movement of clothing can be activated by the effect of pulsating current. It's a moat, and in addition to this, it can be made more active by the action of a unidirectional swirling water flow. Therefore, a high-performance and practical washing machine can be provided.

[Brief explanation of the drawing]

Fig. 1 is a time chart of the reversing cycle of the washing machine according to the present invention, Fig. 2 is a longitudinal cross-sectional view of the entire conventional example, Fig. 3 is an enlarged longitudinal cross-sectional view of the main part, and Fig. 4 is a plane view of the rotor blade. FIG. 5 is a sectional view taken along line A--B in FIG. 4. (1)...Dehydration/washing tub, (4)...Rotary blade.

Claims (3)

[Claims] (1) A washing machine that rotates rotary blades provided at the bottom of the washing tub at low speed and in a short period of time, and is equipped with a reversal cycle in which each pause period during the rotation period is periodically changed. A washing machine characterized by: (2) In a washing machine that intermittently rotates the rotor blades installed at the bottom of the washing tub alternately left and right at low speed and in short periods of time, the pause time between left and right rotations is periodically changed, and A washing machine comprising a reversing cycle in which the left and right rotation times are periodically changed so that as one side increases, the other side decreases. (3) In a washing machine that intermittently rotates the rotor blades installed at the bottom of the washing tub at low speed and in a short period of time alternately on the left and right sides, the rotation time and rest time of each side are changed periodically. and a washing machine characterized by having a reversal cycle in which the longest rotation time and the longest rest time are arranged adjacent to each other.