JPS6351899A - Centrifugal liquid remover - Google Patents

Abstract

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

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is applicable to, for example, a dehydration (washing) tank in a domestic washing machine, a commercial water washer, a dry cleaner, or various other centrifugal dehydrators for industrial use. The present invention relates to an applicable centrifugal dewatering tank.

(Prior art) A rotating drum type dehydrating device that uses centrifugal force to remove liquid is used in household washing machines, commercial washing machines, dry cleaners that use organic solvents, or centrifugal dehydrators for general industrial use. No matter which one is used, the basic structure related to deliquification is the same. Therefore, here, the prior art will be explained using a domestic washing machine as an example.

That is, in the prior art, as shown in FIG.
It consists of a rotating drum 2 made of a 20% perforated plate circumferential wall, a rotating shaft 3 that supports and rotates the rotating drum 2, a motor 4 that drives the rotating shaft 3, and the like. 9 is a hole penetrating the wall surface 7, 10 is a drainage vibrator disposed at the bottom of the dehydration tank 1, and 40 is a vibration isolating rubber interposed between the motor 4 and the machine base.

The washed items 5 are transferred from the washing tub (not shown) to the dehydration tub 1, the lid 6 is closed, and the timer switch (not shown) is turned on.
When the required time has been spent, the rotary drum 2 is rotated at high speed by the motor 4, and the water in the laundry to be washed 5 is transferred to the circumferential wall surface 7 made of a perforated plate concentric with the central axis of rotation of the rotary drum 2.
is discharged from.

Regarding the above-mentioned prior art, the present inventor has developed a technique in which, as shown in FIG. The moisture content of each layer of the laminated cotton fabric 5'' was measured.As shown in FIG. In other words, the water content was approximately twice that of the cotton fabric 5' near the axis of rotation.

This is because the circumferential wall surface 7 is perpendicular to the direction 8 in which centrifugal force acts in FIG.
This is because the water retained between the walls is prevented from moving along the wall and cannot be removed. On the other hand, the water in the cotton fabric 5' that is away from the circumferential wall surface 7 passes through the capillaries in the cotton fabric layer 5' and moves smoothly in the direction 8 of action of the centrifugal force, so that the water on the rotating drum 2 as shown in FIG. The moisture content of the cotton fabric 5' near the center is lower than the moisture content of the cotton fabric 5' near the circumferential wall surface 7.

In addition, the moisture content of the cotton cloth 5' near the circumferential wall surface 7 is
The smaller the thickness, the higher the value tends to be. This is a cotton fabric layer 5' (a layer far from the circumferential wall surface 7) that acts to press down the cotton fabric layer 5' near the circumferential wall surface 7 in the direction of action of centrifugal force.
This is thought to be due to the fact that the weight is small and the squeezing effect is reduced.

(Problems to be Solved by the Invention) As described above, in the conventional dewatering device, since the circumferential wall surface 7 of the rotating drum 2 and the direction 8 in which centrifugal force acts are perpendicular to each other, the circumferential wall surface This has a fundamental defect in that the laundry items 5 in the vicinity of 7 are not sufficiently drained, and the dewatering performance estimated from the magnitude of the centrifugal force is not fully demonstrated. Also, as a matter of course, as a result, extra energy and time are spent on drying the washed items after dehydration.

The present invention has been made to solve these problems, and provides a centrifugal dewatering device that exhibits the original dewatering performance and at the same time reduces energy and time spent during drying. This is what I am trying to do.

(Means for solving the problem) Therefore, the present invention is configured such that the rotating drum wall surface is configured as a wall surface that is not perpendicular to the direction of action of centrifugal force, and this is a means for solving the above problem. It is.

(Function) The main cause of the moisture content distribution in the cotton fabric layer as shown in Figure 8, that is, the abnormally high moisture content near the circumferential wall surface, is as follows.
As mentioned above, the circumferential wall surface extends parallel to the drum rotation center axis, and the direction of action of centrifugal force and the circumferential wall surface are perpendicular to each other, resulting in poor drainage. Therefore, basically, all or part of the circumferential wall should not be parallel to the drum rotation center axis, or the circumferential wall should be perpendicular to the direction of action of centrifugal force instead of having a simple toe-shaped shape. Either way can be used to create a shape that does not intersect.

Therefore, by adopting these measures, the liquid that collects at a position away from the holes in the drum wall is affected by centrifugal force, flows along the wall at a predetermined angle, and is easily discharged from the nearby holes. This greatly reduces the moisture content of the deliquified material after treatment.

(Example) Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

1 to 4 show different embodiments of the invention.

First, to explain the example shown in FIG.
FIG. 2 is a sectional view taken along line A-A.

As is clear from the figure, the dewatering tank 2a according to the present embodiment has a circular shape at any position in a plan cross section, but in a vertical cross section including the rotation axis 3a, the wall surface 7a and the rotation axis 3a are at a predetermined angle. It is configured to form an angle. In the illustrated example, the entire deliquid tank 2a has a urn-like shape with a bulging body midway in the height direction.

The embodiment shown in FIG. 2 is a modification of the embodiment shown in FIG. A large number of holes 70b are bored around each circumference of the apex of the ridge and the bottom of the constriction.

Each of the liquid removal tanks 2a shown in FIGS. 1 and 2.

2b, the acting direction 8 of the centrifugal force and each wall surface 7a, 7b intersect at right angles to the circumferential direction, but in the height direction, the acting direction of the centrifugal force and the wall surface are at a predetermined angle at any part. Because of this angle, when removing liquid, even if centrifugal force acts on the liquid in the tank and it sticks to the walls 7a, 7, the extra centrifugal force acts and the liquid tends to move along the wall surfaces. , it quickly moves into the pores and is discharged outside the tank.

FIG. 3 shows a deliquor tank according to another embodiment (81 is a side sectional view, and FIG. 3(b) is a plan sectional view. The liquid tank 2C has a wall surface 7c in the shape of a hexagonal column, and a large number of holes 9 are provided through each of the top and flat surfaces of the wall surface 7c.

As a result, the acting direction 8 of the centrifugal force and the wall surface 7c are perpendicular to the height direction, but form a predetermined angle with respect to the rotational direction, so that the liquid can easily move along the wall surface 7c in the rotational direction. As in each of the embodiments, the liquid can be smoothly removed.

FIG. 4 shows a modification of the embodiment shown in FIG.
The planar cross section of d is configured in the shape of a gear. A large number of holes are formed in each peak and valley in the height direction. In the above-described embodiment shown in FIG. 3, there was a slight portion where the wall surface 7c and the centrifugal force acting direction 8 were perpendicular to each other in the rotation direction, but in this embodiment, the entire wall surface 7d is It does not intersect at right angles to the direction of action 8, and the liquid can be removed even more effectively.

FIG. 5 shows the results of a dehydration test using the apparatus of the present invention in the same manner as described above, where the solid line is the result according to the present invention and the broken line is the result using the conventional apparatus.

As can be understood from the figure, in the case of the apparatus of the present invention, even the cotton cloth near the wall of the dehydration drum can be sufficiently dehydrated, and the moisture content distribution after dehydration in the direction of the center of the two-rotation drum is large. There is no change, and the dehydration effect is increasing overall.

(Effects of the Invention) As explained in detail above, in the present invention, by adopting the rotating drum wall surface that does not intersect at right angles to the direction in which centrifugal force acts, the liquid that collects on the rotating drum wall surface rotating at high speed is It flows smoothly along the drum wall and is smoothly discharged through the nearby drainage hole. Further, according to the present invention, the moisture content of the material to be deliquified after centrifugal deliquification is greatly improved in both distribution and amount compared to conventional methods.

[Brief explanation of the drawing]

FIG. 1 shows a rotating drum that is an embodiment of the present invention, and the figure (111 is a longitudinal cross-sectional view, and the same figure ('b) is fa) A-A
2 is a longitudinal sectional view of a rotating drum showing another embodiment of the present invention, and FIG. 3 is a longitudinal sectional view of a rotating drum according to another embodiment of the present invention. Figure 4 is a cross-sectional view of a rotating drum showing another embodiment of the present invention, and Figure 5 is a cross-sectional view of the rotary drum shown in Fig. Figure 6 shows a conventional dewatering machine. Figure 8 is an explanatory diagram of the results of a dehydration test using a conventional device. Explanation of the main parts of the diagram 2a, 2b, 2cm rotating tram 3a - rotation center axis 7a, 7b, 7c, 7d - one rotation Drum wall surface 8 Direction of action of centrifugal force Patent Applicant: Mitsubishi Heavy Industries, Ltd.

Claims (1)

[Claims] A centrifugal dewatering device characterized in that a rotating drum wall surface is configured as a wall surface that is not orthogonal to the direction of action of centrifugal force.