JP2016202444A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine which can increase washing capacity without enlarging an outer shape of a washing and dewatering tub, and which can suppress entering and biting of laundry between the washing and dewatering tub and an outer tub cover during a dewatering operation.SOLUTION: A washing machine 1 includes: an inner tub 9 of a washing and dewatering tub of laundry i; an annular fluid balancer 12 provided at an upper part of the inner tub 9, and having a fluid 12c inside for suppressing vibration of the inner tub 9 during a dewatering operation; and an outer tub 10 for storing washing water and for accommodating the inner tub 9. The fluid balancer 12 has an inclined peripheral surface 12n11, on an inner peripheral surface 12n1, inclining toward the inner tub 9 side when the inner tub 9 vibrates and inclines during the dewatering operation.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a washing machine.

In recent years, energy saving of household electrical appliances is progressing to prevent global warming, that is, to protect the global environment.
Accordingly, attention has been focused on increasing the washing capacity and saving water in washing machines.

In order to increase the washing capacity, it is conceivable to enlarge the inner tub that is a washing tub and dewatering tub and the outer tub that accommodates the inner tub. However, the increase in the size of home appliances is unacceptable to consumers in the current situation where there is a limit on the floor area of the house.
The following patent document 1 is known as a document known invention according to the present application.

JP 2001-340694 A

Therefore, when the washing capacity is increased without increasing the size of the outer shape of the inner tub and the outer tub, the following problems occur.
FIG. 16 is a longitudinal sectional view of the vicinity of a fluid balancer of a conventional washing machine.

  When the inner tub 109 is rotated at a high speed during the dehydration operation, vibration is generated in the inner tub 109 in which the laundry is placed during the dehydration operation. In particular, the amplitude of the inner tank 109 increases during resonant vibration at the natural frequency. During this dehydration operation, the laundry is strongly pressed against the inner tub 109 by centrifugal force.

  Therefore, at the time of resonance where the amplitude of the inner tank 109 is large, a gap between the fluid balancer 112 provided at the upper part of the inner tank 109 and rotating at a high speed and the outer tank cover 114 provided at the upper edge of the stationary outer tank 110. A phenomenon occurs in which the laundry i enters or bites into the s100 (see the laundry i1 in FIGS. 17A and 17B). FIGS. 17A and 17B are perspective views showing a state in which laundry enters a gap between the conventional fluid balancer and the outer tub cover.

When the phenomenon of entering the laundry is severe, the laundry is caught in the gap s100 between the outer tub cover 114 and the fluid balancer 112, and the caught laundry i1 is damaged. May occur.
Therefore, conventionally, the following measures have been taken in order to suppress the entry phenomenon of laundry.

  First, the height of the inner tub 109 of the washing tub is increased, and the dimension s101 of the gap s100 between the fluid balancer 112 at the top of the inner tub 109 that rotates at a high speed and the stationary outer tub cover 114 (see FIG. 16). ) To reduce the entry of laundry.

  Second, a ring-shaped upper rib 112r (see FIG. 16) serving as a blocking wall is provided on the upper edge of the fluid balancer 112, and the gap s100 between the fluid balancer 112 rotating at high speed and the stationary outer tub cover 114 is provided. Prevents the entry and biting of laundry.

  Third, R at the inner peripheral lower corner of the fluid balancer 112 is reduced to prevent the laundry from being guided by the R and moving upward of the fluid balancer 112. When the R is large, the laundry i is smoothly guided upward by the large R, and enters or is bitten into the gap s100 between the fluid balancer 112 that rotates at high speed and the stationary outer tub cover 114. It leads to.

  In view of the above situation, the present invention can increase the washing capacity without enlarging the outer shape of the washing and dewatering tub, and can enter and bite the laundry between the washing and dewatering tub and the outer tub cover during the dehydration operation. It aims at providing the washing machine which can control.

  In order to solve the above problems, a washing machine of the present invention is provided with an inner tub of a laundry washing and dewatering tub, and an upper part of the inner tub, and a fluid is contained in the inner tub to suppress vibration during a dehydration operation. An annular fluid balancer, and an outer tub for storing washing water and containing the inner tub, the fluid balancer having an inner peripheral surface thereof when the inner tub vibrates and tilts during dehydration operation. It has an inclined peripheral surface inclined toward the inner tank side.

  According to the present invention, the washing capacity can be increased without increasing the outer shape of the washing / dehydrating tub, and the entry and biting of the laundry between the washing / dehydrating tub and the outer tub cover during dehydration operation is suppressed. A washing machine that can be used.

1 is a perspective view of a washing machine according to an embodiment of the present invention. The longitudinal cross-sectional view of the detailed structure around the inner tub and outer tub of the washing machine of embodiment. The A section enlarged view of FIG. The perspective view of the front side of a pulsation blade board. The B section enlarged view of FIG. (A) is a figure which shows the relationship between the rotational speed of the inner tank 9 at the time of dehydration operation, and the vibration amplitude of the upper part of an inner tank and an outer tank, (b)-(d) is the inner tank at the time of dehydration operation, and the outer tank The figure which showed the state of primary resonance, secondary resonance, and tertiary resonance typically. (A) is a longitudinal cross-sectional view showing the upper part of the inner tub and the outer tub indicated by white arrows in the laundry state of the washing machine of Comparative Example 1 (conventional) at the time of the primary resonance, and (b) is the secondary resonance. The longitudinal cross-sectional view which shows the upper part of the inner tank and the outer tank which showed the state of the laundry of the washing machine of the comparative example 11 (conventional) at the time with the arrow. The longitudinal cross-sectional view which shows the upper part of the inner tank and the outer tank which showed the force which acts on the laundry of the washing machine of embodiment at the time of secondary resonance with the arrow. (A) is a cross-sectional view of the fluid balancer of Comparative Example 11 (conventional), (b) is a cross-sectional view of the fluid balancer of Comparative Example 2, and (c) is a cross-sectional view of the fluid balancer of the embodiment. The expanded sectional view which shows the fluid balancer of the comparative example 11. The cross-sectional view of the fluid balancer of the modification 1. FIG. 10 is a cross-sectional view of a fluid balancer according to a second modification. FIG. 10 is a cross-sectional view of a fluid balancer according to modification example 3. FIG. 10 is a cross-sectional view of a fluid balancer according to modification example 4; FIG. 10 is a cross-sectional view of a fluid balancer according to a fifth modification. The longitudinal cross-sectional view of the fluid balancer vicinity of the conventional washing machine. (A), (b) is a perspective view which shows the state which the laundry entered into the clearance gap between the conventional fluid balancer and an outer tub cover.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
In the following, a vertical washing machine having a vertical rotating shaft capable of performing washing, rinsing, and dewatering steps will be described as an example, but in addition to the washing, rinsing, and dewatering steps, Further, it can be applied to a vertical washing machine capable of performing a drying process.

FIG. 1 shows a perspective view of a washing machine according to an embodiment of the present invention. FIG. 1 shows a state where the outer lid 3 is opened.
In the washing machine 1 of the embodiment, the casing k that forms the outer shell is formed by combining a steel plate and a resin molded product. A resin top cover 2 is attached to the upper portion of the housing k by engagement, screwing, or the like. An outer lid 3 that opens and closes the upper part of the laundry tub when the laundry is taken in and out is bent and attached to the top cover 2 so as to be freely opened and closed.

The outer lid 3 is configured to open the opening 1a formed in the upper part of the housing k by opening it to the rear side while being bent in a mountain shape so as to be convex upward. The outer lid 3 includes an operation panel 8 having various operation button switches 6 and a display 7.
The operation panel 8 is electrically connected to the microcomputer 40 of the control unit provided at the bottom of the machine body.

  On the other hand, on the front surface of the top cover 2, a power switch 5 for turning on / off the power of the washing machine 1 is provided.

  A water supply solenoid valve (not shown) is provided behind the opening 1a (see FIG. 1) in the housing k. And the connection part (not shown) which connects the hose which supplies tap water to a water supply solenoid valve is provided in the rear part of the top cover 2. As shown in FIG.

In FIG. 2, the longitudinal cross-sectional view of the detailed structure around the inner tank and the outer tank of the washing machine of embodiment is shown. In addition, FIG. 2 cuts the washing machine 1 of embodiment with the cross section in the left-right direction. FIG. 3 is an enlarged view of a portion A in FIG.
As shown in FIG. 2, the washing machine 1 includes an inner tub 9, an outer tub 10, a pulsating blade 11 (rotary blade), a fluid balancer 12, and the like in a housing k (see FIG. 1). Has been.

The inner tub 9 is a washing / dehydrating tub that is formed in a bottomed cylindrical shape and is used for washing and dehydrating laundry. The inner tank 9 has a rotation axis in the vertical direction, and is rotatably supported by a driving device 13 (see FIG. 2) provided below the inner tank 9. The inner tank 9 is formed by performing welding or the like using, for example, a stainless steel plate (SUS).
The inner tub 9 has a plurality of small through holes (not shown) for water passage formed on the outer peripheral wall and the bottom wall thereof.

The outer tub 10 is formed in a bottomed cylindrical shape and includes the inner tub 9 coaxially. The outer tub 10 is provided with shock absorbers (not shown) on four support rods (steel rods) that are suspended and suspended by corner plates (not shown) provided at the four corners of the upper end of the housing k (see FIG. 1). It is elastically supported by the center part in the housing | casing k via illustration.
An outer tank cover 14 that covers the upper part of the outer tank 10 and the inner tank 9 is provided at the upper edge of the outer tank 10.

<Pulsed blade 11>
At the bottom of the inner tub 9, there is provided a pulsating blade 11 for applying a physical force when the laundry is easily washed.
FIG. 4 is a perspective view of the front side of the pulsating blade.

  The pulsating blade 11 is formed by raising the central rotation center O. The pulsating blade 11 is formed with a convex portion 11a having a convex shape at a position facing the rotation center O and a concave portion 11b having a concave shape between the convex portions 11a and 11a in the circumferential direction. ing. Thereby, the pulsation blade board 11 is comprised so that uneven | corrugated shape may be repeated in the circumferential direction. Further, the pulsating blade plate 11 is formed with a plurality of holes 11c communicating with the front surface and the back surface.

The pulsating blade 11 is formed in a substantially disk shape and is rotatably supported by a driving device 13 (see FIG. 2) below the inner tank 9. That is, the washing water is stirred together with the laundry by rotating the rotary blade 11 by the driving device 13 at the time of washing and rinsing.
After the fluid balancer 12 is attached to the upper part of the inner tank 9, the pulsation blade plate 11 is deformed from the inside of the fluid balancer 12 (arrow α <b> 1 in FIG. 4) and is placed in the inner tank 9. The pulsating blade 11 is fixed to an electromagnetic operation clutch mechanism 13b provided above the drive device 13 by screwing or the like.

  The drive device 13 includes an electric motor 13a that uses an inverter-driven electric motor or a reversible rotation type capacitor phase-separated single-phase induction motor, an electromagnetically operated clutch mechanism (clutch) 13b, and a planetary gear reduction mechanism. . The drive device 13 has a function of selectively executing the washing drive mode and the dehydration drive mode by controlling the electric motor 13a and the electromagnetically operated clutch mechanism 13b by the microcomputer 40.

The washing drive mode is a mode in which the pulsating blade 11 is repeatedly rotated forward and backward at a low speed repeatedly in a released state where the inner tub 9 can be locked or freely rotated so as to be stationary.
The dehydration drive mode is a high-speed rotation mode in which the inner tank 9 and the pulsating blade 11 are integrally rotated at a high speed in the same direction.

<Fluid balancer 12>
The fluid balancer 12 is formed in a ring shape with synthetic resin or the like, and is provided at the upper end edge (upper edge) of the body plate 9d of the inner tank 9. The fluid balancer 12 cancels the eccentricity by moving the internal fluid to the opposite side of the eccentricity when the eccentricity of the laundry i occurs during the rotation of the inner tub 9 during dehydration. Thereby, it is a member which maintains the balance of rotation of the inner tub 9 which put the laundry. The fluid balancer 12 is configured by enclosing a fluid 12c.

FIG. 5 is an enlarged view of a portion B in FIG. The fluid balancer 12 has a cross section shown in FIG.
The fluid balancer 12 includes a balance ring case 12a, a balance ring lid 12b, and a fluid 12c.
The balance ring case 12a is a resin molded product, for example, injection molded using PP (polypropylene) containing tempered glass.

  The balance ring case 12a is an annular member having an upper opening. In the balance ring case 12a, an inner short cylindrical inner cylindrical wall 12k1 and an outer short cylindrical outer cylindrical wall 12k2 are formed. The inner wall 12k1 and the outer wall 12k2 of the two partition walls define the fluid balancer 12 into three annular chambers 12r1, 12r2, and 12r3. A fluid 12c is placed in each of the annular chambers 12r1, 12r2, and 12r3. The fluid 12c is filled with salt water or the like having a large specific gravity in order to reduce the size of the fluid balancer 12.

  The inner peripheral wall 12n of the balance ring case 12a is formed with a truncated cone-shaped inclined peripheral surface 12n11 from the center upper part to the lower end part. A corner portion 12d formed by the inner peripheral surface 12n1 and the bottom surface 12i of the balance ring case 12a is formed in an R shape in a cross-sectional view of FIG.

  The frustoconical inclined peripheral surface 12n11 of the inner peripheral wall 12n of the balance ring case 12a is washed when the inner tub 9 and the fluid balancer 12 are inclined at an average maximum amplitude at the time of resonance of the inner tub 9 described in detail later. It is formed with an inclination facing the inner tub 9 side with respect to the direction perpendicular to the centrifugal force acting on i. In other words, the inclined peripheral surface 12n11 of the inner peripheral wall 12n of the balance ring case 12a is formed with an inclination that faces the inner tub 9 side with respect to the rotation axis around which the inner tub 9 rotates.

  By forming an inclined peripheral surface 12n11 and an R-shaped corner portion 12d following the inclined peripheral surface 12n11 on the inner peripheral surface 12n of the fluid balancer 12, the laundry i during the dehydration operation can It is drawn into the lower inner tank 9 from the inclined peripheral surface 12n11 of the peripheral surface 12n1. Thereby, it is suppressed that the laundry jumps out of the inner tub 9 and enters the gap s between the fluid balancer 12 and the outer tub cover 14 or is bitten.

A circumferential mounting projection 12t protrudes outward from the lower outer periphery of the outer peripheral wall 12s of the balance ring case 12a and has a rectangular cross section (see FIG. 5).
The balance ring lid 12b is a member having a substantially annular plate shape having a large opening at the center.

  First to fourth mounting recesses 12b1 to 12b4 are formed in an annular shape in the lower part of the balance ring lid 12b. The upper portions of the inner peripheral wall 12n, the inner cylindrical wall 12k1, the outer cylindrical wall 12k2, and the outer peripheral wall 12s of the balance ring case 12a are fitted into the first to fourth mounting recesses 12b1 to 12b4, respectively.

  In assembling the fluid balancer 12, the fluid 12c is put into the chambers 12r1, 12r2, and 12r3 of the balance ring case 12a. And the 1st-4th attachment recessed parts 12b1-12b4 of the lower part of the balance ring cover 12b are inserted in 12n of the inner peripheral wall 12n of the balance ring case 12a, the inner cylindrical wall 12k1, the outer cylindrical wall 12k2, and the outer peripheral wall 12s, respectively. State.

  In this state, the balance ring lid 12b and the balance ring case 12a are rotated at a relatively high speed to be melted by frictional heat, and the inner peripheral wall 12n, the inner cylindrical wall 12k1, the outer cylindrical wall 12k2, and the outer periphery of the balance ring case 12a The upper part of the wall 12s is melt-bonded to the first to fourth mounting recesses 12b1 to 12b4 at the lower part of the balance ring lid 12b. Thereby, the fluid balancer 12 is assembled.

  When the fluid balancer 12 is assembled to the upper part of the inner tank 9, the upper part of the SUS cylindrical body plate 9d constituting the inner tank 9 is fixed to the mounting convex part 12t by an L-bend 9d1. The fluid balancer 12 is fixed by being bolted to the body plate 9d at a plurality of locations.

<Dynamic behavior of inner tank 9 and outer tank 10 during dehydration operation>
FIG. 6A is a diagram showing the relationship between the rotation speed of the inner tank 9 during the dehydration operation and the vibration amplitude of the upper parts of the inner tank 9 and the outer tank 10. The horizontal axis represents the rotational speed of the inner tank 9, and the vertical axis represents the vibration amplitude of the inner tank 9 and the outer tank 10. FIGS. 6B to 6D are diagrams schematically showing the state of the primary resonance, the secondary resonance, and the tertiary resonance of the inner tank 9 and the outer tank 10 during the dehydration operation.

  When measuring the vibration amplitude of the outer tub 10, the front, rear, left and right of the outer tub 10 were measured with a total of eight laser-type position detectors at the top and bottom. Further, when measuring the vibration amplitude of the inner tank 9, clay was attached between the outer tank 10 and the inner tank 9, and the vibration amplitude of the inner tank 9 was measured from the deformation state of the viscosity.

  When the washing machine 1 performs the dehydration operation, large vibration amplitudes of the primary resonance, the secondary resonance, and the tertiary resonance are observed from the start of the dehydration to the maximum rotation speed (maximum rotation speed) of the dehydration operation. The primary resonance is a rotation speed of the inner tank 9 of about 80 rpm, and the tertiary resonance is a rotation speed of the inner tank 9 of about 1100 rpm.

In the primary resonance, as shown in FIG. 6B, a translational motion in which the inner tank 9 and the outer tank 10 both reciprocate linearly in one direction is observed.
In the secondary resonance, as shown in FIG. 6 (c), both the inner tank 9 and the outer tank 10 are observed to sway around like the sesame in the center of the rotation axis O 1 of the inner tank 9. This movement is called a sesame rub movement.
In the third resonance, as shown in FIG. 6D, the inner tank 9 and the outer tank 10 are in opposite phases, and a swinging motion is observed around the point O2 on the rotation axis of the inner tank 9. This movement is referred to as a sesame slicking movement in the opposite phase of the inner tank and the outer tank.

Since the rotation speed of the inner tub 9 is smaller than the tertiary resonance, the phenomenon that the laundry i enters or bites between the outer tub cover 14 and the fluid balancer 12 has a problem of the primary resonance and the secondary resonance. become.
Then, since the inner tub 9 is largely inclined at the time of secondary resonance, the gap i between the outer tub cover 14 and the fluid balancer 12 of the laundry i enters or bites (FIGS. 17A and 17B). ))).

  FIG. 7A is a longitudinal cross-sectional view showing the upper part of the inner tub and the outer tub, in which the behavior of the laundry i of the washing machine of Comparative Example 11 (conventional) at the time of primary resonance is indicated by a white arrow. 7 (b) is a longitudinal sectional view showing the upper part of the inner tub and the outer tub indicated by arrows with respect to the behavior of the laundry of the washing machine of Comparative Example 11 at the time of secondary resonance.

  In Comparative Example 11, at the time of the primary resonance of the dehydrating operation of the inner tub 109, the laundry i is covered with the outer tub cover by the outward centrifugal force F when the inner tub 109 is rotated, as shown in FIG. A phenomenon in which the gap s100 between the fluid balancer 112 and the fluid balancer 112 enters or is bitten is observed.

  In Comparative Example 11, during the secondary resonance of the dewatering operation of the inner tub 109, as shown in FIG. 7 (b), the laundry i becomes a fluid balancer due to the outward centrifugal force F during the high speed rotation of the inner tub 109. A phenomenon is observed in which the inner peripheral surface 112n1 of 112 is slid into the gap s100 between the outer tank cover 114 and the fluid balancer 112, or is bitten. This is because the inner peripheral surface 112n1 of the fluid balancer 112 of Comparative Example 1 has a shape along the direction of the rotation axis of the inner tank 109 (see FIG. 16).

  Therefore, when the inner tank 109 is tilted during the secondary resonance, the fluid balancer 112 fixed to the upper part of the inner tank 109 is tilted, and the inner peripheral surface 112n1 of the fluid balancer 112 faces upward as shown in FIG. It will be in the state which has the inclination of. Therefore, the laundry i near the fluid balancer 112 slides on the inner circumferential surface 121n1 of the fluid balancer 112 with the upward centrifugal force F when the inner tub 109 rotates at high speed, and slides on the outer tub cover 114 and the fluid. It is considered that the gap s100 with the balancer 112 enters or is bitten.

FIG. 8 is a longitudinal sectional view showing the upper part of the inner tub and the outer tub in which forces acting on the laundry of the washing machine of the embodiment at the time of the secondary resonance are indicated by arrows.
On the other hand, in the washing machine 1 of the embodiment, as shown in FIG. 5, when the washing machine 1 is not in operation, the inclined peripheral surface 12 n 11 is formed in advance from the center to the lower part of the inner peripheral wall 12 n of the fluid balancer 12. An R-shaped corner portion 12d is formed.

  As described above, the inclination of the inclined peripheral surface 12n11 of the fluid balancer 12 is relative to the rotation axis of the inner tank 9 that rotates when the inner tank 9 and the fluid balancer 12 are inclined at least when the average maximum amplitude during resonance is inclined. It has an inclination toward the inner tub 9 side (an inclination facing downward from the vertical). That is, the inner peripheral surface 12n1 of the fluid balancer 12 has the inclined peripheral surface 2n11 that inclines toward the inner tub 9 when the inner tub 9 vibrates and tilts during the dehydrating operation.

  Therefore, the laundry i receives external force in the horizontal outer direction due to the centrifugal force F generated by the high-speed rotation of the inner tub 9, but the inclined peripheral surface 12n11 of the inner peripheral wall 12n of the fluid balancer 12 and the R-shaped corner 12d following this 8 has an inclination toward the lower inner tub 9 side, and as shown by the arrow in FIG. 8, the centrifugal force applied to the laundry i becomes a force toward the lower inner tub 9 side. Work.

  Accordingly, the laundry i is guided by the inclined peripheral surface 12n11 of the inner peripheral wall 12n of the fluid balancer 12 facing the inner tub 9 side and the R-shaped corner portion 12d following this, and is drawn into the lower inner tub 9. . This suppresses the laundry from jumping out of the inner tub 9 and the fluid balancer 12 during the dehydration operation. Therefore, the laundry i is prevented from entering or biting into the gap s (see FIG. 3) between the outer tub cover 14 and the fluid balancer 12 during the dehydrating operation.

<Comparison of entering state of laundry in comparative example 1, comparative example 2 and embodiment>
Next, in Comparative Example 1 and the embodiment, the verification result of the phenomenon of entering the gap s between the outer tub cover 14 and the fluid balancer 12 when the washing capacity is increased from 10 kg to 11 kg will be described.
The data which compared the entering state of the laundry in the fluid balancer of the comparative example 1 and the comparative example 2 and the embodiment using the inner tubs 109 and 9 of the washing / dehydrating tub of the same size are shown below.
The experimental conditions were a test cloth loaded, a standard course repeated 30 times without detergent.

  FIG. 9 is a cross-sectional view of a fluid balancer in which experiments for comparing the entry of the laundry into the gap between the outer tub cover and the fluid balancer in Comparative Example 1, Comparative Example 2, and the embodiment were performed. 9A is a cross-sectional view of the fluid balancer of Comparative Example 1 (conventional), FIG. 9B is a cross-sectional view of the fluid balancer of Comparative Example 2, and FIG. It is a cross-sectional view of the fluid balancer of the embodiment.

  In Comparative Example 1 of FIG. 9A, the R-shaped radius (R radius) of the lower corner portion 112n2 of the inner peripheral surface 112n1 of the inner peripheral wall 112n of the fluid balancer 112 is reduced in a cross sectional view. As described above, the comparative example 1 is intended to suppress the laundry i into the lower inner tub 109 by reducing R of the lower corner portion 112n2 (the white arrow in FIG. 9A).

  In Comparative Example 2 of FIG. 9B, the inner peripheral wall 22n of the fluid balancer 22 is formed in a shape such that the lower portion of the inner peripheral surface 22n1 has a recess 22no in a cross-sectional view. Then, a downward facing (projection) 22n2 is formed at the inner end of the recess 22no. The comparative example 2 is intended to suppress the laundry i into the inner tub 9 below (the white arrow in FIG. 9 (b)) by the lower concave portion 22no and the downward facing 22n2 of the inner peripheral surface 22n1. is there.

The fluid balancer 12 of the embodiment of FIG. 9C has an inclined circumferential surface 12n11 formed on the inner circumferential surface 12n1 of the fluid balancer 12 and a corner portion 12d at the inner lower end of the inner circumferential wall 12n as R in a cross-sectional view. It is formed in a shape. In the embodiment, the centrifugal force at the time of dehydration aims to draw the laundry i into the lower inner tub 9 (the white arrow in FIG. 9C).
Table 1 shows the experimental results of the laundry entering state in the fluid balancer of Comparative Example 1, Comparative Example 2, and the embodiment.

入り込み率は、洗濯容量１０ｋｇと１１ｋｇとで実験を行った。本実施形態では、内槽９の大きさを変えることなく、洗濯容量のアップ（例えば、洗濯容量１０ｋｇから１１ｋｇへアップ）を図るものであるから、従来の洗濯容量１０ｋｇでの実施形態での洗濯物の入り込み率のデータはとっていない。そして、洗濯容量を１１ｋｇにアップして、比較を行った。

The penetration rate was tested with washing capacities of 10 kg and 11 kg. In the present embodiment, the laundry capacity is increased without changing the size of the inner tub 9 (for example, the laundry capacity is increased from 10 kg to 11 kg). Therefore, the washing in the embodiment with the conventional laundry capacity of 10 kg is performed. Data on the entry rate of objects is not taken. Then, the laundry capacity was increased to 11 kg, and a comparison was made.

  From Table 1, the penetration rate of the laundry of Comparative Example 1 having a washing capacity of 10 kg was 13%, which was a value that could be used. 13% of the target value is a penetration rate that satisfies the actual usage record of the washing machine 1 (can withstand practical use of the washing machine 1).

When the washing capacity is increased from 10 kg to 11 kg without changing the size of the inner tubs 109 and 9 with a washing capacity of 11 kg, the comparative example 1 and comparative example 2 have a penetration rate of 23% and a practically acceptable value (at least the penetration rate) 13%) was not obtained. On the other hand, in the embodiment, even when the washing capacity was increased to 11 kg, a result satisfying the target value of 13% penetration rate was obtained.
From the above results, it was proved that the laundry capacity can be increased without changing the size of the inner tub 9 by the configuration of the embodiment (the configuration of FIGS. 5 and 9C).

<Volumes of chambers 12r1, 12r2, and 12r3 into which the fluid 12c in the fluid balancer 12 is placed>
Here, as shown in FIG. 5, when the inclined peripheral surface 12 n 11 is formed on the inner peripheral wall 12 n of the fluid balancer 12, it is considered that the volume of the fluid put into the fluid balancer 12 is necessarily reduced.
However, in the washing machine 1, the pulsation blade 11 and the fluid balancer 12 are attached to the fluid balancer 12 in the inner tub 9, and the pulsation blade 11 is attached after the fluid balancer 12 is attached to the upper part of the inner tub 9. I am going to do that.

  Specifically, as described above, the fluid balancer 12 is fixed to the upper portion of the inner tank 9 by the L-bend 9d1 of the cylindrical body plate 9d of SUS forming the inner tank 9. Then, the fluid balancer 12 positioned by the L-bend 9d1 is bolted to the body plate 9d at a plurality of locations, and the fluid balancer 12 is fixed to the upper portion of the inner tank 9.

Thereafter, the fluid balancer 12 is deformed inward as shown by an arrow α1 in FIG. 5 and is inserted into the lower part of the inner tank 9 from the inside of the fluid balancer 12 fixed to the upper part of the inner tank 9, It is fixed to the operation clutch mechanism 13b by screwing or the like.
For this reason, in the washing machine 1, no other member (for example, the welding 109 w (see FIG. 10) of Comparative Example 1) is disposed between the inner tub 9 and the fluid balancer 12, so the fluid 12 c is put into the fluid balancer 12. The volumes of the chambers 12r1, 12r2, and 12r3 can be sufficiently secured without being reduced by the welding 109w.

FIG. 10 is an enlarged cross-sectional view showing a fluid balancer of Comparative Example 1.
On the other hand, Comparative Example 1 (conventional) has a structure in which the pulsation blade is fixed to the electromagnetically operated clutch mechanism 13b before the fluid balancer 112 is attached to the inner tank 109 without being deformed. Here, in Comparative Example 1, since the pulsation blade plate is fixed to the electromagnetically operated clutch mechanism 13b without being deformed, the outer diameter of the pulsation blade plate is large. I can't.

  Therefore, in Comparative Example 1, a member for attaching the fluid balancer 112 called the annular welding 109 w to the upper part of the inner tank 109 is fixed to the upper part of the inner tank 109. And after fixing a pulsation blade board to the electromagnetic operation clutch mechanism 13b, the fluid balancer 112 is attached to the welding 109w fixed to the upper part of the inner tank 109. FIG.

  Specifically, as shown in FIG. 10, a cylindrical body plate 109 d of SUS that forms the inner tank 109 is L-bent 109 d 1, and an annular welding 109 w is fixed to the upper part of the inner tank 109. Then, the welding 109w positioned by the L-bend 9d1 is bolted to the body plate 109d at a plurality of locations, and the welding 109w is fixed to the upper portion of the inner tank 9.

  Thereafter, the pulsation blade is fixed to the electromagnetic operation clutch mechanism 13b by screwing or the like from the upper part of the inner tank 109 through the inside of the welding 109w fixed to the upper part of the inner tank 109. Thereafter, the fluid balancer 112 is attached to the welding 109 w fixed to the upper portion of the inner tank 109.

  Therefore, in Comparative Example 1, the volume of the outermost 112r3 chamber out of the annular chambers 112r1, 112r2, 112r3 into which the fluid 112c is placed is narrowed by the amount of the welding 109w. When the amount of the fluid 112c decreases, the effect of suppressing vibrations during the dehydration operation of the inner tank 109 is diminished, so it is necessary to secure a certain amount of the fluid 112c.

  On the other hand, since the washing machine 1 has a configuration in which the pulsating blade 11 is deformed and fixed to the electromagnetically operated clutch mechanism 13b, the annular welding 109w used in the comparative example 1 can be eliminated. Therefore, the volumes of the chambers 12r1, 12r2, and 12r3 into which the fluid 12c of the fluid balancer 12 is placed are not reduced by the annular welding, and the volumes of the chambers 12r1, 12r2, and 12r3 of the fluid balancer 12 are sufficiently secured.

Therefore, as shown in FIG. 5, even if the inclined peripheral surface 12n11 of the inner peripheral surface 12n1 is formed so as to bite into the volume of the chamber 12r3 of the fluid balancer 12, the volume of the fluid balancer 12 to put the necessary fluid 12c into is sufficient. Can be secured.
By forming the inclined peripheral surface 12n11 on the inner peripheral surface 12n1 of the fluid balancer 12, the volume formed by the inner tank 9 and the fluid balancer 12 is increased. Therefore, there is an effect that the washing capacity can be increased.

<Modification 1>
In FIG. 11, the cross-sectional view of the fluid balancer of the modification 1 is shown.
The fluid balancer 32 of the first modification includes the balance ring case 32a as the inclined peripheral surface 32n11 of the concave curved portion having a curved shape with the curvature facing the inner tank 9 below the inclined peripheral surface 12n11 described in the embodiment. Is formed.
In the inclined circumferential surface 32n11 of the concave curved portion of the recessed shape of the modified example 1, the inclination downward (inner tub 9 side) can be increased, and the effect of drawing the laundry i into the lower inner tub 9 is great. .

<Modification 2>
In FIG. 12, the cross-sectional view of the fluid balancer of the modification 2 is shown.
The fluid balancer 42 according to the modified example 2 uses the inclined peripheral surface 12n11 described in the embodiment as an inclined peripheral surface 42n11 having a convex curvature with a curvature directed toward the lower inner tank 9 side. 42a.

  In the inclined peripheral surface 42n11 of the modification 2, the inclination to the lower inner tub 9 can be increased at the lower part, and the effect of drawing the laundry i into the lower inner tub 9 is great. Moreover, since it is the convex curved part 42n11 of a shape with a convex curvature, the capacity | capacitance in the fluid balancer 42 can be maintained and the quantity of the fluid 42c can be ensured.

<Modification 3>
In FIG. 13, the cross-sectional view of the fluid balancer of the modification 3 is shown.
The fluid balancer 52 of Modification 3 is formed by forming the inclined peripheral surface 12n11 described in the embodiment in the balance ring case 52a as an inclined peripheral surface 52n11 having a shape extending from the upper end edge to the lower end edge of the inner peripheral surface 52n1.

  According to the modification 3, since the inclined peripheral surface 52n11 is formed from the upper end edge to the lower end edge of the inner peripheral surface 52n1, the entire inner peripheral surface 52n1 of the fluid balancer 52 is drawn into the inner tub 9 into the laundry i. Can give power. Accordingly, it is possible to effectively prevent the laundry i from jumping out of the inner tub 9 during vibration of the dehydration operation of the inner tub 9 and entering or being bitten by the gap s between the inner tub 9 and the outer tub cover 14. it can.

<Modification 4>
In FIG. 14, the cross-sectional view of the fluid balancer of the modification 4 is shown.
The fluid balancer 62 of the modified example 4 has an inclined peripheral surface 32n11 of a concavely curved concave portion having a curvature facing downward (inner tank 9 side) described in the modified example 1, and an upper end edge of the inner peripheral surface 62n1. Is formed in the balance ring case 62a as the inclined peripheral surface 62n11 of the concave curved portion having a hollow shape extending from the lower end to the lower end edge.

  In the modified example 4, since the inclined peripheral surface 62n11 of the concave curved portion is formed in the balance ring case 62a from the upper end edge to the lower end edge of the inner peripheral surface 62n1, the laundry i is removed from the fluid balancer 62. A force to be drawn into the inner tank 9 can be applied to the entire inner peripheral surface 62n1. Therefore, the inclination for drawing the laundry i into the lower inner tub 9 can be increased, and the effect of drawing the laundry i into the lower inner tub 9 is great.

<Modification 5>
In FIG. 15, the cross-sectional view of the fluid balancer of the modification 5 is shown.
The fluid balancer 72 of the modified example 5 has the inclined circumferential surface 42n11 of the convex curved portion having a convex curvature having a curvature facing downward (inner tank 9 side) described in the modified example 2 on the inner circumferential surface. The inclined peripheral surface 72n11 having a convex curvature extending downward from the upper end edge to the lower end edge of the 72n1 is formed on the balance ring case 72a.

In the modified example 5, since the inclined peripheral surface 72n11 having a convex curvature is formed on the balance ring case 72a from the upper end edge to the lower end edge of the inner peripheral surface 72n1, the laundry i is removed from the fluid balancer 72. The whole inner peripheral surface 72n1 can provide a force to be drawn into the inner tank 9.
Moreover, since it is the inclined peripheral surface 72n11 of a shape with a convex curvature, the capacity | capacitance in the fluid balancer 72 can be maintained and the quantity of the fluid 72c can be ensured.

<< Other Embodiments >>
1. In the embodiment and the modification, the vertical washing machine having the rotation axis of the washing tub in the vertical direction has been described as an example, but the rotation axis of the drum is provided in the substantially horizontal direction, and each process of washing and dehydration is performed. The present invention can also be applied to a drum-type washing machine and a drum-type washing / drying machine that performs a drying process in addition to the washing and dewatering processes.

  In the case of a drum-type washing machine or drum-type washing / drying machine, an inclined peripheral surface having a slope facing the drum side when the drum is vibrated and tilted during dehydration operation is provided on the inner peripheral surface of the fluid balancer provided at the opening of the drum (washing An inclined peripheral surface facing the drum side with respect to a direction perpendicular to the centrifugal force received by the object is provided.

2. Not only the configuration of the embodiment but also the configurations of Modifications 1 to 5 can be applied to the drum type washing machine and the drum type washing and drying machine.

3. The configurations described in the above embodiments and modifications are examples of the present invention, and various specific forms and modifications can be made within the scope of the claims of the present application.

DESCRIPTION OF SYMBOLS 1 Laundry 9 Inner tub 10 Outer tub 12, 22, 32, 42, 52, 62, 72 Fluid balancer 12c Fluid 12n1 Inner peripheral surface F Centrifugal force 12n11 Inclined peripheral surface 12d R shape of lower end 32n11, 62n11 Inclined peripheral surface ( Concave surface with concave curvature)
42n11, 72n11 inclined peripheral surface (inclined peripheral surface with convex curvature)
52n11 inclined peripheral surface (inclined peripheral surface formed from the upper edge to the lower edge)

Claims (4)

A laundry washing and dewatering tank inner tub,
An annular fluid balancer provided in the upper part of the inner tank and having a fluid inside to suppress vibration during dehydration operation of the inner tank;
Storing the wash water, and comprising an outer tub for accommodating the inner tub,
The fluid balancer is
The washing machine, wherein the inner peripheral surface has an inclined peripheral surface that inclines toward the inner tub when the inner tub is vibrated and inclined during a dehydrating operation. The washing machine according to claim 1,
A corner of the inner periphery of the fluid balancer is formed in an R shape having a curvature in a cross-sectional view. The washing machine according to claim 1,
The inclined peripheral surface of the fluid balancer is
The washing machine, wherein the inner tank is inclined toward the inner tub side with respect to the rotation axis at an average maximum amplitude during resonance in the dehydrating operation of the inner tub. The washing machine according to claim 1,
The washing machine, wherein the inclined peripheral surface of the fluid balancer has a concave curvature or a convex curvature.

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