JPS6164282A - 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 B) Field of Industrial Application The present invention relates to a washing machine that allows rotary blades provided at the bottom of a washing tub to rotate left and right in a predetermined order in a short period of time.

(b) Conventional technology These days, this type of washing tub has moved away from the traditional 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 in a short period of time. They are now being replaced by ones that can be rotated to minimize damage to clothing. The latter example is shown in Japanese Patent Application Laid-Open No. 59-47390, and will be explained based on FIGS. 2 to 5.

(1) is a washing tub that also serves as a dehydration tank, and has many dehydration holes (2) on its peripheral wall, and a balance ring (3) on the 70-mouth rim.
) is installed. A rotary blade (4) is disposed at the center of the bottom of the washing tub (1). Washing tub 1) is $800! (5), and at the bottom of the outer tank (5) is a drive motor (
6>, a drive mechanism (7) including 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 (1
0), a substantially triangular prism-shaped protrusion (11) that gradually protrudes from the periphery of the base (10) toward the center, and a protrusion that protrudes from each triangular apex of the protrusion toward the periphery of the base (10). As is clear from Figure 4, each blade (12) draws a gentle curve toward the periphery of the base (10) (towards the right in the same direction). It's biased. Above protrusion (height H of 11〉)
is determined to be about 172 times the outer diameter (d) of the circular base (10) and lower than the water surface height (h) of the washing fit (1). In the example, the inner diameter of the washing tub (1) (D >= 400 [nvn], the outer diameter (d) of the circular base (10) -320 [mm], the height of the protrusion (11) H) = 140 [nwn].

At the top of the protrusion (11), a substantially triangular prism (13) with a smaller diameter is formed at the top. This triangular prism (
13), the slope (θ2) of the side surface is gentler than the slope (θ1) of the upper end of the side surface of the large-diameter triangular prism (the protrusion (11)) below it, as shown in FIG. In the example, the angles are (θ2) −12″ and (θ1) −8°.

In the figure, (14) is the boss that fits with the top of the wing shaft (15).
The insert can be moved to the boss (16) provided on the back side of the top of the rotor. Rotation M (4) is set by attaching a screw (
17〉, it is attached to the wing shaft.

The rotary blade (4) is rotated alternately left and right, and its rotation speed is 450 [r, p, m] to 7 as that of a conventional rotor blade.
20[r, p, m lower than 300[r, p
, The awn is less than m. The example is about 180
It is defined as [r, p, m].

Then, a reversal cycle consisting of a collection of the same single cycle of rotating to the right for 1 to 2 seconds, pausing for 0.5 to 1 second, and rotating to the left for 1 to 2 seconds is repeated during the set time. I have to. Furthermore, even if the water surface in the washing tub (1) becomes lower in the center as shown by the dashed line in Fig. 3 due to the rotation of the rotary blade (4) during this rotation, It is a value that does not become low.

In such a device, when water is supplied to the washer (1) and a cloth (C) is put in, and the rotor blade (4) is rotated, the cloth (C) is poured at the bottom of the rotor blade (4) in the same way as the rotor blades used conventionally. Create a water flow that tries to rotate the cloth in the horizontal direction, and at the top of the rotor blade, use the triangular prism-shaped surface of the protrusion <11) and the blades (12) to apply a force that causes the cloth to rise and fall. As a result, the cloth temporarily sinks toward the rotor along the side wall of the washing tub, as shown by the arrow in Figure 2, and then floats up along the triangular prism-shaped protrusion (11) in the horizontal direction. Rotate.

In particular, since the three blades (12) of the rotor blade are deflected in a gentle curve in the same direction (rightward) as shown in Figure 4, 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 clockwise rotation and the water flow, which lifts the cloth upwards.This is because clockwise rotation applies a stronger force to the water, so it hits the washing tub wall more strongly and the reaction is due to the reaction. This creates a floating water flow, which causes the fabric to move up and down.

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, since the top part of the protrusion <11) is formed with a substantially triangular prism (13) having a smaller diameter by one step, the upper end of the protrusion part (11) having a larger diameter and the diameter having a smaller diameter are formed. The approximately triangular prism (13) at the top generates turbulent flow in this area, and the cloth becomes more entangled in this area. Since it is the side inclination angle (θ2) of the approximately triangular prism (13),
This makes it easier for the cloth to climb over the rotor blade 4).

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

In the conventional example, the clothes are rotated horizontally at the lower part of the rotation R (4), and the clothes are raised and lowered up and down at the upper part, and the clothes are moved up and down as a whole.
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.
The idea is to make it more active.

(D) Means for Solving the Problems The feature of the present invention is the reversal cycle of the rotor blade, in which the rotation time in one direction is gradually lengthened and the rotation time in the other direction is gradually shortened; It ends when that time reaches the longest or shortest time.

(e) Effect: When this reversal cycle is repeated for a set time, the left and right rotation times change in length and shortness, so the water flow becomes a pulsating flow due to the difference in left and right rotation times, which activates the movement of the clothes. . Then, when moving to the next reversal cycle, the rotational force in one direction changes from the highest to the lowest and the rotational force in the other direction changes from the lowest to the highest, causing the water flow to pulsate violently and further invigorate 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. In the rinsing process, the rotor blades are rotated in a cycle stored in the microcomputer. For details, see about 18 Or, p.
At a rotation speed of 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 rest time of 0.5 seconds or less.

In the fully automatic course, as before, water supply → washing, water, intermediate dehydration, water supply, 1st rinse, drainage, intermediate dehydration, water supply, 2nd
A process of rinsing and draining → final dehydration is executed, 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.

The reversal cycle (one cycle) of the rotor blade 4) in the washing process and each rinsing process is shown in Fig. 1 (a), and the change in the intensity of the water flow that can be formed thereby is shown in Fig. 1 (b). Here, in the reversal cycle, the left and right rotations are alternately rotated with a constant pause time of 0.2 seconds, and the left rotation side is the longest from 1.2 seconds to 1.0 seconds → 08 seconds - 06 seconds - Changes from 0.4 seconds to 0.6 seconds → 0.8 on the clockwise rotation side from the shortest 04 seconds.
It changes as seconds → 1.0 seconds → l, 2 seconds. Note that, if each rotation time is subdivided, it is the total time of the subdivisions.

In this way, the water flow that emerged was a counterclockwise rotation water flow that gradually became weaker.
The clockwise rotation water flow gradually becomes stronger, and the difference in left and right rotation time creates a pulsating flow that actively moves the clothes. Before moving on to the next reversal cycle, the counterclockwise rotation time is the shortest, while the clockwise rotation time is the longest.In particular, the clockwise rotation makes it easier to move the garment upwards due to the deflected blade (12).
Therefore, at this time, the clothes actively move up and down, promoting the change of clothes. Then, when moving to the next reversal cycle, the clockwise rotation time changes from the longest to the shortest and the counterclockwise rotation time changes from the shortest to the longest, respectively, and at this time, the water flow generated by left and right rotation has a maximum change in strength At this point, it pulsates extremely violently, making the movement of the clothing even more active.

Incidentally, each rotation time in this embodiment can be changed within the above-mentioned range. Further, although the reversal cycle gradually shortens the time on the left rotation side, it may be replaced with a reversal cycle in which the time on the right rotation side is gradually shortened and the time on the left rotation side is gradually lengthened. Furthermore, the starting rotation direction of each reversal cycle may be changed from the clockwise rotation direction.

(g) Effects of the Invention According to the present invention, the water flow is pulsated by the difference in left and right rotation time, and the change in the left and right water flow is maximized when transitioning to the next reversal cycle, so the movement of clothing is greatly reduced. It is possible to increase the size of the washing machine, improve the detergency both visually and practically, and provide an extremely high-performance washing machine.

[Brief explanation of the drawing]

Figure 1 (a) is a time chart of the reversing cycle of the washing machine according to the present invention, Figure 1 (b) is a diagram of water flow intensity changes, and Figure 2
The figure is a longitudinal view of the present invention and the conventional example as a whole, FIG. 3 is an enlarged longitudinal sectional view of the main part, FIG. 4 is a plan view of the rotor, and FIG. 5 is the same as FIG. It is a sectional view based on the A-0-B line. (1)...Dehydration/washing tub, (4)...Rotary blade.

Claims (1)

[Claims] (1) In a washing machine in which the rotor blades provided at the bottom of the washing machine are rotated from side to side in a predetermined order for short periods of time, each rotation time of the rotor blades in one direction is gradually lengthened and the rotation time in the other direction is gradually increased. 1. A washing machine comprising a reversing cycle in which each rotation time is gradually shortened and the rotation time in one direction is the longest or the rotation time in the other direction is the shortest.