JPS62189098A - Centrifugal dehydrator - 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 [Field of Industrial Application] The present invention relates to a centrifugal dehydrator, and more particularly to a dewatering tank of a centrifugal dehydrator.

[Prior art]

Conventionally, in a centrifugal dehydrator used in a washing machine, a dehydration tank is rotatably mounted inside an outer tank constituting a dehydrated water receiving tank, and a plurality of dehydration holes are provided on the wall of the dehydration tank. Alternatively, the inner wall of the dehydration tank may be formed into a tapered shape that gradually increases in diameter from the bottom upwards, and the inner wall of the dehydration tank may be drilled from below along the tapered surface. In addition to forming a number of grooves extending upward, a drainage outlet is provided near the top of the dehydration tank; in the latter case,
During spin-drying, water from the laundry rises along the tapered inner wall of the spin-drying tank due to centrifugal force as the spin-dry tank rotates, and flows out through the drain port provided near the top of the spin-dry tank. It is discharged into a tank.

[Problem that the invention seeks to solve]

However, in conventional centrifugal dewatering machines commonly used, the dewatering rate of the cloth located near the inner wall of the dehydration tank is lower than that of the cloth located closer to the center of the tank.

Experiments have revealed that the dehydration rate of the entire dehydration tank is non-uniform. In particular, when performing small volume dehydration, most of the cloth is attached to the inner wall of the dehydration tank, so the dehydration rate is extremely low. Focusing on the reduction in drying time, even if the dehydration rate of the washed cloth is only slightly different by about 1%, the influence of this difference cannot be ignored.

Here, the reason why the dehydration rate is low near the inner wall of the dehydration tank will be explained below.

In other words, as dehydration progresses and the water content of the cloth in contact with the inner wall of the tank decreases to a value commensurate with the applied centrifugal force, the centrifugal force applied to the water contained in the cloth and the The adhesion forces of the cloth are balanced and no more water escapes from the cloth. On the other hand, water moves easily in continuous fibers, and even a relatively small centrifugal force causes water to move toward the tank wall surface. The reason for this is due to the help of the capillary action of the fibers, which means that the h
This can also be understood from the fact that the dehydration rate of the cloth that undergoes 74-day treatment improves at an early stage. Furthermore, due to the movement of water in the fibers, the moisture content of the cloth in contact with the 1M inner wall gradually increases, but for the same reason as mentioned above, the moisture content of the cloth in contact with the inner wall of the tank increases due to the applied centrifugal force. Once the water content has decreased to a level commensurate with the above, dehydration will no longer proceed.

In addition, the present applicant has previously developed a dehydration tank for a centrifugal dehydrator.
A dehydration tank having a wall surface made of a porous water-absorbing member is proposed (see Japanese Patent Application Laid-open No. 60-207700). According to this, the moisture of the washing cloth in the portion that is in contact with the inner wall of the dehydration tank is removed by removing the water from the water-absorbing member. By moving water into the same member through capillary action, the dehydration rate of the cloth located near the inside of the tank is improved, reducing uneven dehydration, promoting the movement of water in the fibers, and improving the overall dehydration tank. The dehydration rate could be improved.

The present invention is based on the above-mentioned Japanese Unexamined Patent Publication No. 60-2-2, which was previously proposed by the applicant.
This was done as a result of studies to further improve the centrifugal dehydrator described in Publication No. 07700, and its purpose is to improve the dehydration rate of laundry cloth located near the inner wall of the dehydration tank and to reduce uneven dehydration. In addition to promoting the movement of water within the fibers and improving the dehydration rate of the dehydration tank as a whole, the water-absorbing member made of a porous material, that is, a relatively brittle material, absorbs friction caused by washing cloth. SUMMARY OF THE INVENTION The object of the present invention is to provide an improved centrifugal dehydrator that can reduce damage to the water-absorbing member and improve its durability.

[Means for solving problems]

In order to achieve the above object, the present invention provides a centrifugal dehydrator having a structure in which a dehydration tank is rotatably mounted inside an outer tank constituting a dewatering water receiving tank, in which a recess is provided in the inner wall of the dehydration tank,
A water-absorbing member is installed in this recess, and the surface position of the water-absorbing member is set at a level lower than the top of the inner wall of the dehydration tank.

[Effect]

One aspect of the present invention, as described above, is that a recess is provided in the inner wall of the dehydration tank, which is a rotating member of the a-core dehydrator, and a water-absorbing member is installed in the recess.

During dehydration, after the water content in the cloth in contact with the inner wall of the tank has decreased to a water content that is commensurate with the applied centrifugal force,
By moving the moisture in the washed 1M cloth in the portion that is in contact with the inner wall of the tank into the water-absorbing member by the capillary action of the water-absorbing member, the water removal rate of the cloth located near the inner wall of the tank is improved, and the unevenness of water removal is improved. It is possible to reduce the amount of water, promote the movement of water within the m fibers, and improve the dehydration rate of the dehydration tank as a whole.

Furthermore, in the present invention, by setting the surface position of the water-absorbing member at a level lower than the top of the inner wall of the dehydration tank, the water-absorbing member made of a porous material, that is, a relatively brittle material, is The water-absorbing member is less likely to be subjected to the frictional action caused by the water-absorbing member, thereby reducing damage to the water-absorbing member and improving its durability.

〔Example〕

Hereinafter, the present invention will be explained based on one embodiment of FIGS. 1 to 3. FIG. 1 is a vertical sectional view showing the overall internal structure of a fully automatic washing machine to which the present invention is applied, and FIG. 1 is a partially enlarged cross-sectional view of the washing/drying tub 8 shown in FIG. 1 during washing, and FIG. 3 is a partially enlarged cross-sectional view of the same washing/drying tub 8 during dewatering.

In FIG. 1 showing the overall internal structure of a fully automatic washing machine to which the present invention is applied, 1 is a button for operating the dehydrating and washing machine, 2 is a lid, and the lid 2 opens upward about a fulcrum 3. . 4
is a communication pipe, which is connected to a connection part 5 of a water supply pipe (not shown), and has a water supply part 6 into a washing/dehydration tank 8 and an outer tank 14.

Reference numeral 18 denotes a washing cloth input port, and 7 a cover for preventing cloth from falling between the washing/dehydrating tub 8 and the outer tub 14. The cover 7 is provided on the upper part of the outer tub 14. 10 is a balance ring that allows the washing machine to rotate 4v8 smoothly during dehydration. 11 is a stirring blade, which includes a main blade 12 and a small blade 1.
3. Hanging rods 15a and 15b elastically suspend the outer tank 14 via a spring 16.

(17 is a plurality of lines running up and down the inner wall of the washing and dehydrating tank 8)
As shown in FIGS. 2 and 3, the surface S is the top of the inner wall of the washing and dewatering tank 8, which is a protrusion relative to the groove 33 of the washing/drying tank 8. It is located at a lower level than 8a. Dehydration holes 9 are located at the bottom of the groove 33 described above (t), and a plurality of washing and dehydration tanks are provided, some of which also penetrate the water absorbing member 17 (denoted by reference numeral 9). ′),
During the dewatering operation, water in the washing and dehydrating tank 8 is discharged into the outer tank 14 through the dehydrating holes 9 (and 9').

In FIGS. 2 and 3, 8b is a rib that reinforces the strength of the washing and dehydrating tub 8, and 32 is a washing cloth. Also, in Figure 1,
19 is a hollow shaft, and the power of the motor 22 is transferred to the motor pulley 23.
Belt 24 Driven pulley 25 Power division transmission device 26
The washing/dehydration tank 8 fixed to the hollow shaft 191 is rotated at high speed.
Perform dehydration. Reference numeral 20 denotes a shaft of the stirring blade 11, which, like the hollow shaft 19 described above, receives power from a motor 22 and rotates the stirring blade 11.
drive to do laundry.

21 is a stay 27a that supports the motor 22;

Reference numeral 27b indicates a leg supporting the main body of the washing machine, 31 indicates a cooling blade for the motor 22, 28 indicates a drain pipe, 29 indicates a drain valve, and 30 indicates a back cover.

In the above configuration, when button 1 is operated, water supply pipe connecting portion 5. Communication pipe 4. After passing through the water supply section 6, there is a washing/dehydration tank 8 and an outside M14.
When washing water is supplied into the washing machine and detergent is added, the motor 22 rotates to rotate the stirring blades 11 in the forward and reverse directions to perform washing.

At this time, as shown in FIG. 2, the washing cloth 32 is mainly subjected to a force in the circumferential direction, and the washing cloth 32 is moved inside the tank inner wall top 8a, which is a protrusion relative to the groove 33 of the washing/drying tub 8. Since it moves from side to side, the washing cloth 32 does not come into contact with the water-absorbing member 17 whose surface S is located at a lower level than the inner wall top 8a of the washing/dehydration tank 8, and therefore the washing cloth 32 is made of porous material. That is, friction between the water absorbing member 17 made of a relatively fragile material and the washing cloth 32 can be effectively prevented.

Next, when the washing is completed and the dehydration process begins, a large amount of water at the initial stage of dehydration is absorbed into the pores and the bottom of the grooves 33 of the water absorbing member 17 installed in the washing/dehydration tank 8 (1433). The water is discharged into the outer NJ 14 through the hole 9 and the dewatering hole 9' which penetrates not only the bottom of the groove 33 but also the water-absorbing member 17, and the water discharged into the outer tank 14 is drained into the drain pipe 28.
As shown in FIG. closely adhere to. Therefore, even after dehydration progresses and the water content in the cloth 32 in contact with the inner wall of the tank has decreased to a water content that is commensurate with the applied centrifugal force, the portion of the cloth 32 in contact with the inner wall of the tank
Since the moisture in the water absorbent member 17 moves into the water absorbent member 17 by the capillary action of the water absorbent member 17, the water removal rate of the cloth 32 located near the inner wall of the tank is improved, uneven water removal is reduced, and the moisture inside the fibers is increased. The cloth 32 that is in close contact with the inner wall of the tank and the water-absorbing member 17 is held in the groove 33 during spin-drying. Since the cloth 32 is held in a fixed state, unstable movement of the cloth 32 described above is prevented, and friction between the cloth 32 and the water-absorbing member 17 made of a porous material, that is, a relatively fragile material is effectively prevented. be able to.

By the way, when performing small volume dehydration, most of the cloth 32 is attached to the inner wall of the tank, and conventionally,
As mentioned above, the dehydration rate of the fabric 32 has tended to be extremely low, but according to the present invention, even in the case of such small volume dehydration, the dehydration rate of the cloth 32 can be greatly improved. be able to. In addition.

During dehydration, the water in the cloth 32 that is in contact with the inner wall of the tank is given a circumferential component by the centrifugal action of the washing and dehydrating tank 8, so the water in the cloth 32 that is in contact with the inner wall of the tank is easy to move. It passes through the cloth 32 and quickly moves to the water absorbent member 17 side.

FIG. 4 shows a second embodiment of the invention.

In the first embodiment, when the water-absorbing member 17 is integrally attached to the groove 33 provided on the inner wall of the washing/drying tub 8, it becomes stiff (shown in f1, but in the second embodiment, The water-absorbing member 17 is removably attached to the groove 33 provided on the inner wall of the washing and dewatering unit 18,
According to this second embodiment, even if the water absorbent member 17 is damaged due to some D factor while the washing machine is used for a long period of time, the water absorbency of the damaged area will be reduced. Replacing the member 17 with a new member 17 is extremely easy.

FIG. 5 shows a third embodiment of the present invention.

In the third embodiment as well, the inner wall of the washing and dehydrating tub 8 is formed into a tapered shape whose diameter gradually increases from the bottom to the top, and the inner wall of the washing and dehydrating tub 8 has
A large number of grooves extending upward from the servant are formed along the tapered surface, a water-absorbing member 17 is installed in the grooves, and a drain port 34 is provided near the upper side of the washing and dewatering tank 8.
During spin-drying, water from the washing cloth rises along the tapered inner wall of 4Ily8 and the water-absorbing member 17 due to centrifugal force as the washing and dehydrating tank 8 rotates, and rises to the upper part of the tank 8. It is discharged into the outer tank 14 from a drain port 34 provided in the outer tank 14.

FIG. 6 shows a fourth embodiment of the present invention.

In the fourth embodiment, the inner wall of the washing and dehydrating tub 8 is formed into a tapered shape whose diameter gradually increases from the top to the bottom, and the inner wall of the washing and dehydrating tub 8 has the following features:
A large number of grooves extending downward from the top are formed along the tapered surface, a water-absorbing member 17 is installed in the grooves, and a drain port 35 is provided near the bottom of the washing and dehydration tank 8. At this time, water from the washing cloth flows down along the tapered inner wall of the tub 8 and the water-absorbing member 17 due to centrifugal force as the washing and dehydrating tub 8 rotates, and flows downward toward the bottom of the tub 8. It is discharged into the outer tank 14 from the provided drain port 35.

In addition, in both the third and fourth embodiments described above, a dehydration hole indicated by the reference numeral 9 and a dehydration hole indicated by the reference numeral 9' are added to the first embodiment and the second embodiment. It's okay.

In addition, instead of the third and fourth embodiments described above, the inner wall of the washing/dehydration tank 8 is not formed into a tapered shape, but instead the water absorption tank 8 is installed in a groove 33 running vertically on the inner wall of the tank. The thickness of the sex member 17 is gradually decreased from the bottom to the top.

Alternatively, the inner wall of the tank may be sloped upward and downward by gradually decreasing it from one side toward the bottom.

Further, as another embodiment of the present invention, a large number of small recessed fitting parts having dehydration holes communicating with the outer tank 14 are formed on the inner wall of the washing and dehydration tank 8, and a water absorbent member 17 is provided in the small recessed fitting parts. In that case, the dehydration hole indicated by 9 and the dehydration hole indicated by 9' may be provided together in the first embodiment and the second embodiment, or the water absorbing member 17 may be attached. It is also possible to newly drill a dewatering hole in a portion of the inner wall of the tank that has not been removed.

By the way, the present invention is described in the illustrated embodiment.

Although the case where the present invention is applied to a fully automatic washing machine in which the washing tub and the dehydrating tub are shared in one tank has been illustrated, the present invention can also be applied to the dehydrating tub of a so-called two-tank washing machine in which the washing tub and the dehydrating tub are separate. Of course, it is possible to implement the following.

〔Effect of the invention〕

The present invention is as described above, and as is clear from the description of the above embodiments, the present invention relates to a centrifugal dehydrator having a structure in which a dehydrating tank is rotatably mounted inside an outer tank constituting a dehydrated water receiving tank. In this method, a recess is provided in the inner wall of the dehydration tank, a water-absorbing member is installed in the recess, and the surface position of the water-absorbing member is set at a level lower than the top of the inner wall of the dehydration tank. In addition to improving the dehydration rate of the laundry cloth located near the inner wall of the dehydration tank and reducing uneven dehydration, it also promotes the movement of water within the fibers and improves the dehydration rate of the dehydration tank as a whole. porous material,
That is, an improved centrifugal dehydrator in which the water absorbent member made of a relatively fragile material is less susceptible to the frictional action of washing cloth, thereby reducing damage to the water absorbing member and improving its durability. can be obtained.

[Brief explanation of drawings]

1 to 3 show an embodiment of a centrifugal dehydrator according to the present invention, FIG. 1 is a vertical sectional view showing the overall internal structure of a fully automatic washing machine to which the present invention is applied, and FIG. FIG. 1 is a partially enlarged cross-sectional view of the washing and dehydrating tank 8 shown in FIG. FIG. 2 is a partial cross-sectional view of the washing/dehydrating machine M8 corresponding to an embodiment of the present invention, and FIGS. FIG. 8... Washing and dehydration tank, 8a... Top of tank inner wall, 9 and 9'... Dehydration hole, 14... Dehydrated water receiving tank (outer tank),
17...Water absorbent member, 33...Groove, 34 and 35
...Drainage port. 0. #1, let's go. Pa)゛(1 idiot) l7---Takufu'lazyfPkou 2nd figure 3ku S 32 3rd figure 8th

Claims (1)

[Claims] 1. In a centrifugal dehydrator having a structure in which a dehydration tank is rotatably mounted inside an outer tank constituting a dehydration water receiving tank, a recess is provided in the inner wall of the dehydration tank, and water is absorbed into the recess. 1. A centrifugal dewatering machine characterized in that a water-absorbing member is attached and the surface position of the water-absorbing member is set at a level lower than the top of an inner wall of a dehydrating tank. 2. A centrifugal dewatering machine according to the invention as set forth in claim 1, in which a water-absorbing member is removably attached in a recess provided in the inner wall of the dehydrating tank. 3. In the invention set forth in claim 1 or 2, the centrifugal dewatering device is provided with a dewatering hole communicating with an outer tank constituting the dehydrated water receiving tank in a recess provided in the inner wall of the dehydrating tank. Machine. 4. In the invention according to any one of claims 1 to 3, the inner wall of the dehydration tank is formed in a tapered shape whose diameter gradually increases from the bottom to the top,
Further, a number of grooves extending from bottom to top are formed on the inner wall of the dehydration tank along the tapered surface thereof, a water-absorbing member is installed in the grooves, and a drain port is provided near the top of the dehydration tank. Centrifugal dehydrator. 5. In the invention according to any one of claims 1 to 3, the inner wall of the dehydration tank is formed in a tapered shape whose diameter gradually increases from the top toward the bottom,
Further, a large number of grooves extending from top to bottom are formed on the inner wall of the dehydration tank along the tapered surface thereof, a water-absorbing member is installed in the grooves, and a drain port is provided near the bottom of the dehydration tank. Centrifugal dehydrator. 6. In the invention according to any one of claims 1 to 3, the thickness of the water-absorbing member installed in the groove running vertically on the inner wall of the dehydration tank increases from the bottom to the top. Therefore, the use of centrifugal dehydrators is gradually decreasing. 7. In the invention according to any one of claims 1 to 3, the thickness of the water-absorbing member installed in the groove running vertically on the inner wall of the dehydration tank increases from the top to the bottom. Therefore, the use of centrifugal dehydrators is gradually decreasing. 8. In the invention according to any one of claims 1 to 3, a large number of small recessed fitting portions having dehydration holes communicating with an outer tank constituting the dehydrated water receiving tank are formed on the inner wall of the dehydration tank. A centrifugal dehydrator in which a water-absorbing member is installed inside this small recessed part. 9. In the invention according to any one of claims 4 to 7, a large number of small recessed fitting portions having dehydration holes communicating with the outer tank constituting the dehydrated water receiving tank are formed on the inner wall of the dehydration tank. A centrifugal dewatering machine is equipped with a structure in which a water-absorbing member is attached inside this small recessed part.