WO2019150837A1

WO2019150837A1 - Washing machine

Info

Publication number: WO2019150837A1
Application number: PCT/JP2018/047169
Authority: WO
Inventors: 真銅　勝利; 直夫長谷
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2018-01-31
Filing date: 2018-12-21
Publication date: 2019-08-08
Also published as: CN111655924B; SG11202006273VA; TW201934837A; MY183929A; JP2019129998A; CN111655924A; JP6937465B2; TWI733072B; PH12020550938A1

Abstract

A circulating water passage (10) is formed between a circulating water passage cover (14) and a washing and spin-drying tank (7) having a pulsator (8) disposed rotatably in a central bottom portion thereof, and washing liquid that has risen through the circulating water passage (10) from a pump chamber (19) formed at the outer periphery of a blade (18) provided on a lower surface side of the pulsator (8) is discharged from a discharge port (11) toward the inside of the washing and spin-drying tank (7). The total surface area of holes in the pulsator (8) is greater than the minimum cross-sectional area in the flow passage of the circulating water passage (10), and the minimum cross-sectional area in the flow passage of the circulating water passage (10) is smaller than the surface area of the discharge port (11). This configuration enables laundry positioned above the water surface inside the washing and spin-drying tank (7) to be pulled down below the water surface, while applying the washing liquid over a wide area onto all laundry that newly appears above the water surface, thereby improving washing unevenness and improving the cleaning performance.

Description

Washing machine

The present invention relates to a washing machine that performs each step of washing, rinsing, and dehydrating.

Conventionally, this type of washing machine forms a circulation channel in the washing and dehydrating tub, circulates the washing liquid in the washing and dehydrating tub using the circulation channel, and applies the washing liquid to the clothes from the upper part of the washing and dehydrating tub. The structure which improves washing | cleaning performance by washing is proposed (for example, refer patent document 1).

FIG. 7 is a longitudinal sectional view of a conventional washing machine described in Patent Document 1.

In FIG. 7, a plurality of circulation water channel covers 56 a and 56 b are provided on the inner surface of the washing and dewatering tub 53, and a plurality of

circulation water channels

57 a and 57 b are formed between the circulation water channel covers 56 a and 56 b and the washing and dewatering tub 53. ing.

Further, a blade 58 is integrally provided on the lower surface side of the stirring blade 52, a pump chamber 59 is formed on the outer peripheral side of the blade 58, and the pump chamber 59 is communicated with the

circulation water channels

57a and 57b.

Openings

60 a and 60 b that open toward the inside of the washing and dewatering tub 53 are formed in the upper portions of the

circulation channels

57 a and 57 b, respectively. A waste thread filter 62 is attached to the opening 60 of the circulating water channel 57a to remove the waste thread from the washing liquid circulating through the circulating water channel 57a. The opening 60b of the circulating water channel 57b is provided with a watering nozzle 61 so that the washing liquid sprayed from the opening 60b to the washing and dewatering tub 53 is blown away.

The motor 63 drives the stirring blade 52 via the V belt and the speed reduction mechanism 65. The water level sensor 66 is connected to the lower part of the water receiving tank 51 to detect the water level in the washing / dehydrating tank 53 and inputs the output to the control device 67.

With the above configuration, in the washing process, the stirring blade 52 is rotated by the rotation of the motor 63, and the laundry 73 and the washing liquid in the washing and dewatering tub 53 are stirred. The blades 58 are rotated together with the stirring blades 52, and the washing liquid between the stirring blades 52 and the washing / dehydrating tub 53 is pushed outward by the centrifugal force generated by the rotation of the blades 58. The washing liquid pushed outward passes through the circulating

water passages

57 a and 57 b and is sprinkled into the washing and dewatering tub 53 from the watering nozzle 61 and the waste thread filter 62. As a result, a large amount of washing liquid is sprinkled on the laundry in the washing and dewatering tub 53 from above.

However, the configuration of Patent Document 1 has a problem that the washing liquid is sprayed only on a part of the laundry and does not cover the entire laundry.

In response to this, other washing machines have been proposed (for example, see Patent Document 2).

FIG. 8 is a cross-sectional view of a main part of the circulating water channel part of the conventional washing machine described in Patent Document 2 as viewed from the front.

In FIG. 8, a T-shaped circulation water channel cover 72 is provided on the side wall of the washing and dewatering tub 71, and a circulation water channel 73 is formed between the washing and dewatering tub 71 and the circulation water channel cover 72. The circulation water channel 73 includes a side water channel 79 and an upper water channel 80, and a central discharge port 74, a left discharge port 75, and a right discharge port 76 are formed in the upper water channel 80. When the pulsator 77 at the bottom of the washing and dewatering tank 71 rotates, the washing water circulates in the circulation water channel 73, and the washing liquid rises in the side water channel 79 and flows to the upper water channel 80, and the central discharge port 74, the left discharge port 75, Water is sprayed from the right discharge port 76 toward the laundry in the washing and dewatering tank 71.

When the washing process starts, the washing liquid in which the detergent is dissolved is pushed out of the pump chamber 78 by the centrifugal force generated by the rotation of the lower blades of the pulsator 77 and flows into the circulation channel 73. The washing liquid ascends the side water channel 79, flows into the upper water channel 80, and is sprayed from the central discharge port 74, the left discharge port 75, and the right discharge port 76 toward the laundry in the washing and dewatering tub 71.

A large number of through holes 81 are formed on the side surface of the washing and dewatering tub 71, and a fluid balancer 82 is provided on the upper periphery.

Japanese Unexamined Patent Publication No. 7-31785 JP 2016-097233 A

However, in the configuration of Patent Document 2, the washing liquid is applied to the entire laundry, but if the laundry located above the water surface stays on the water surface, uneven washing may occur. Further, it is necessary to dispose the circulating water channel 73 below the fluid balancer 82, which increases the volume of parts, increases the cost, and is not suitable for increasing the diameter of the washing and dewatering tank 71.

The present invention provides a washing machine which prevents washing unevenness and improves washing performance at low cost.

The washing machine of the present invention includes a washing and dewatering tub, a pulsator rotatably disposed at the bottom of the washing and dewatering tub, a blade provided on the lower surface side of the pulsator, and a pump chamber formed on the outer periphery of the pulsator blade And a washing / dehydrating tub and a circulation channel cover, and a circulation channel having a discharge port for circulating the washing liquid from the pump chamber as the pulsator rotates and discharging it to the washing / dehydrating tub, and a pulsator, And a plurality of holes for guiding the pulsator to the lower surface side of the pulsator, and the total area of the holes of the pulsator is set larger than the minimum cross-sectional area in the flow path of the circulating water channel.

This configuration can improve the stirring efficiency of the laundry, improve washing unevenness, and improve the washing performance.

FIG. 1 is a longitudinal sectional view of a washing machine according to the first embodiment of the present invention. FIG. 2 is a perspective view of the pulsator of the washing machine according to the first embodiment of the present invention. FIG. 3 is a plan view showing the surface of the circulating water channel cover of the washing machine in the first embodiment of the present invention. FIG. 4 is a plan view showing the back surface of the circulating water channel cover of the washing machine in the first embodiment of the present invention. FIG. 5 is a plan view showing a main part of the surface of the circulating water channel cover of the washing machine according to the first embodiment of the present invention. FIG. 6 is a plan view showing a main part of the back surface of the circulating water channel cover of the washing machine according to the first embodiment of the present invention. FIG. 7 is a longitudinal sectional view of a conventional washing machine. FIG. 8 is a cross-sectional view of a main part of another conventional washing machine.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(First embodiment)
Hereinafter, the washing machine in the 1st embodiment of the present invention is explained with a drawing.

FIG. 1 is a longitudinal sectional view of a washing machine according to the present embodiment. FIG. 2 is a perspective view of the pulsator of the washing machine in the present embodiment. FIG. 3 is a plan view showing the surface of the circulating water channel cover of the washing machine in the present embodiment. FIG. 4 is a plan view showing the back surface of the circulating water channel cover of the washing machine in the present embodiment. FIG. 5 is a plan view showing the main part of the surface of the circulating water channel cover of the washing machine in the present embodiment. FIG. 6 is a plan view showing the main part of the back surface of the circulating water channel cover of the washing machine in the present embodiment.

In FIG. 1, a water tank 3 is supported by a vibration-proof spring 2 in a housing 1 so as to be swingable. A washing / dehydrating tub 7 for storing laundry is rotatably supported in the water tub 3. The washing / dehydrating tub 7 is supported rotatably about the washing / dehydrating shaft 4, and a pulsator 8 having a plurality of holes 13 is rotatably supported on the inner bottom of the washing / dehydrating tub 7. The hole 13 penetrates the pulsator 8 and communicates the upper and lower sides of the pulsator 8.

The washing and dewatering tub 7 is provided with a plurality of dewatering holes 5 on the side wall, and an annular fluid balancer 6 for reducing dewatering vibration is attached to the upper part. The washing / dehydrating tub 7 is provided with a pair of circulating water channel covers 14 at opposite positions on the side walls, and a circulating water channel 10 is formed between the side surface of the washing / dehydrating tub 7 and the circulating water channel cover 14. Two circulation channels 10 are formed in the washing and dewatering tub 7 by attaching a pair of circulation channel covers 14. The circulation channel 10 is preferably formed in the same shape in order to suppress the occurrence of imbalance when the washing and dewatering tub 7 rotates, but the shape may be varied as necessary.

A motor 9 is disposed at the bottom of the water tank 3, and the motor 9 incorporates a clutch mechanism and a brake mechanism. During the washing operation, the motor 9 brakes the dehydrating shaft of the washing / dehydrating shaft 4, drives the washing shaft of the washing / dehydrating shaft 4, and rotates the pulsator 8. During the dehydration operation, the motor 9 releases braking of the dehydration shaft, rotationally drives the washing / dehydration tub 7, and opens the drain valve 26, so that the washing liquid or the rinsing liquid in the water tub 3 is discharged to the drain port 25. Then, the water is drained outside through the drain valve 26.

The blade 18 is integrally formed on the lower surface side of the pulsator 8, and when the pulsator 8 is rotated by the motor 9, the washing water is pushed out to the outer peripheral side by the centrifugal force of the blade 18, and circulates in the circulation channel 10. The washing water circulated through the circulation water channel 10 is discharged and sprinkled into the washing and dewatering tub 7 from the discharge port 11 of the circulation water channel 10 located at the upper part of the washing and dehydration tub 7.

An operation display unit 23 is disposed at the upper front of the housing 1, and a control device 24 is provided below the operation display unit 23 in the housing 1. The control device 24 includes control means (not shown) composed of a microcomputer, and controls the rotation of the motor 9, the opening and closing of the water supply valve 22 and the drain valve 26, and a series of steps of washing, rinsing and dehydration. Are controlled sequentially. As shown in FIG. 1, a water supply valve 22 for supplying water into the washing and dewatering tub 7 is provided at the rear part of the housing 1.

Next, the circulating water channel 10 and the circulating water channel cover 14 will be described with reference to FIGS. As shown in FIGS. 3 and 4, the circulation water channel cover 14 is formed with discharge ports 11 at positions corresponding to the upper and middle portions of the washing and dewatering tub 7. The discharge port 11 may be formed only at a position corresponding to the upper part of the washing and dewatering tank 7.

A rib 12 is formed on the back surface of the circulation channel cover 14 so as to protrude toward the washing / dehydrating tub 7, and the rib 12 is brought into contact with the inner surface of the washing / dehydrating tub 7 to define the circulation channel 10. . The circulating water channel 10 can adjust the flow rate and the flow velocity by changing the width of the rib 12 or changing the width of the circulating water channel cover 14 in the depth direction.

Each circulating water channel 10 has a minimum cross-sectional area in the flow channel larger than the area of the discharge port 11 located above, and suppresses pressure loss, while washing liquid ejected from the discharge port 11 located above The discharge range can be widened.

As shown in FIG. 6, in this embodiment, each circulating water channel 10 has an area of the discharge port 11 in which the cross-sectional area of the flow channel is positioned at the upstream position immediately before reaching the discharge port 11 positioned above. It is narrower. For example, each circulating water channel 10 has a flow path whose width is shorter than the length of the discharge port 11 in the longitudinal direction (width a in FIG. 6) at the upstream position immediately before reaching the discharge port 11 positioned above. (Width b in FIG. 6), and the position formed so as to have a width b shorter than the width a in the longitudinal direction of the discharge port 11 is close to the discharge port 11 (in FIG. 6). Interval h).

With this configuration, each circulation water channel 10 forms a flow path having a smaller cross-sectional area than the area of the upper discharge port 11 at the upstream position immediately before reaching the discharge port 11, while suppressing pressure loss. The water ejected from the discharge port 11 located above is widened.

The difference (ab) between the width a in the longitudinal direction of the discharge port 11 and the width b of the narrow channel on the upstream side of the discharge port 11 is set large, and further, from the discharge port 11 to the channel with a narrow width b. By making the interval h close, the washing liquid can be ejected in a wide range.

In order to efficiently supply the washing liquid to the laundry by ejecting the washing liquid from the discharge port 11 located above in a wide range, the flow rate of the circulated washing liquid and the cross-sectional area of the circulation water channel 10 are optimized. Must be set.

If the difference (ab) between the width a in the longitudinal direction of the discharge port 11 and the width b of the narrow channel on the upstream side of the discharge port 11 is too large, water ejected from the discharge port 11 may break. The distance discharged from the discharge port 11 decreases.

If the difference (ab) between the width a in the longitudinal direction of the discharge port 11 and the width b of the narrow channel at the upstream position just before reaching the discharge port 11 is too small, the laundry discharged from the discharge port 11 The liquid does not spread over a sufficient discharge range.

If the distance h from the discharge port 11 to the narrow flow path is too long, the effect of narrowing the cross-sectional area of the flow path cannot be exhibited, and the distance discharged from the discharge port 11 decreases.

If the interval h from the discharge port 11 to the narrow channel b is too short, the washing liquid discharged from the discharge port 11 does not spread over a sufficient discharge range.

As a result of various experiments, it was found that the washing liquid can be ejected over a wide range by setting the above-described width a, width b, and interval h so that 4> (ab) / h> 2.

In the above formula, when (ab) / h is set to be larger than 4, water ejected from the discharge port 11 is broken or the distance discharged from the discharge port 11 is decreased. Conversely, if (ab) / h is set to be smaller than 2, the washing liquid discharged from the discharge port 11 does not spread over a sufficient discharge range.

In the present embodiment, the cross-sectional area of the flow path is changed by adjusting the width of the flow path, but by adjusting the interval between the circulation water channel cover 14 of the flow path and the washing and dewatering tub 7. It is good also as a structure which changes a cross-sectional area, and it is good also as a structure which changes the cross-sectional area of a flow path by adjusting both.

The operation and action of the washing machine configured as described above will be described below.

In the washing process, the laundry is put into the washing and dewatering tub 7 and starts. When the water supply valve 22 operates, water enters to a predetermined height of the water tub 3, and the pulsator 8 rotates to start the washing operation.

When the washing operation starts, the blades 18 also rotate with the rotation of the pulsator 8, and the washing water rises from the pump chamber 19 by the centrifugal force generated by the rotation of the blades 18, and the washing and dehydration tank 7 is discharged from the discharge port 11. Watering towards the laundry.

At this time, the washing water is pushed to the outer peripheral side by the centrifugal force generated by the rotation of the blades 18 of the pulsator 8 and the washing water is pumped up into the circulation channel 10. As a result, the washing water in the washing and dewatering tub 7 is drawn into the lower surface side of the pulsator 8 from the hole 13 of the pulsator 8.

In the present embodiment, the total area of the holes 13 formed in the pulsator 8 is set to be larger than the sum of the minimum cross-sectional areas of the two circulation channels 10. For this reason, the water flow which flows from the hole 13 of the pulsator 8 to the lower surface side of the pulsator 8 increases, the pull-in water flow of the laundry increases, and the effect that the laundry is drawn below the water surface increases.

Further, since the convection of the washing water in the washing and dewatering tub 7 is increased, the convection efficiency of the laundry is improved, and the laundry newly emerging on the water surface by the convection of the washing water can also be discharged from the discharge port 11. The washing liquid can be continuously sprinkled. In particular, in the course of having a function of increasing the water temperature and performing the washing process with warm water, it is possible to prevent the temperature of the laundry on the surface from being lowered and to reduce washing unevenness.

In the conventional configuration, it is conceivable to increase the rotation speed of the pulsator, but in this configuration, the vortex water flow due to the rotation of the pulsator becomes stronger than the water flow drawn to the lower surface side of the pulsator. For this reason, the water flow that draws the laundry below the water surface becomes strong, but the water flow that pushes the laundry above the water surface is weak, so the efficiency of spraying the washing liquid on the laundry is reduced.

From the above, the washing machine according to the present embodiment can stir the washing liquid in the washing and dewatering tub 7 while sprinkling the washing liquid uniformly from above, so that washing is suppressed while preventing washing unevenness. The performance can be improved.

As described above, the first invention is a washing / dehydrating tub, a pulsator rotatably disposed at the bottom of the washing / dehydrating tub, a blade provided on the lower surface side of the pulsator, and an outer periphery of the pulsator blade. A circulation chamber having a discharge port that is formed between the pumping chamber formed in the washing and dehydration tub and the circulation water channel cover, circulates the washing liquid from the pump chamber with the rotation of the pulsator, and discharges it to the washing and dehydration tub. Is provided. In addition, the pulsator is formed with a plurality of holes for guiding the washing water to the lower surface side of the pulsator, and the total area of the holes of the pulsator is set larger than the minimum cross-sectional area in the flow path of the circulating water channel.

This configuration increases the amount of water that is drawn into the laundry and increases the stirring efficiency with which the laundry is drawn below the surface of the water. In addition, the drawn water flow is drawn into the circulating water channel following the water flow previously pumped into the circulating water channel, so that it is possible to continuously apply the washing liquid to the laundry that appears on the water surface. It is.

In the second invention, in particular, the minimum cross-sectional area in the flow path of the circulating water channel of the first invention is set smaller than the area of the discharge port.

With this configuration, the drawn water flow is drawn into the circulating water channel following the water flow previously pumped into the circulating water channel, so that the pressure loss in the middle route can be reduced even for laundry that has newly appeared on the water surface. It is possible to apply the washing liquid continuously with a minimum.

In the third invention, in particular, the flow path of the circulating water channel of the first invention has a cross-sectional area at the upstream position of the discharge port set smaller than the area of the discharge port.

This configuration allows the washing liquid to be sprayed over a wide area of the laundry by narrowing the length in the direction to be spread immediately before.

In the fourth aspect of the invention, in particular, the flow path of the circulating water channel of the second aspect of the present invention is such that the cross-sectional area at the upstream position of the discharge port is set smaller than the area of the discharge port.

In particular, the fifth aspect of the invention relates to the flow path at the upstream position of the discharge port of the circulation path of the third invention, the width in the longitudinal direction of the discharge port is a, the width of the flow path at the upstream position of the discharge port is b, 4> (ab) / h> 2 where h is the distance between the outlet and the channel having a small cross-sectional area at the upstream position of the discharge port.

This configuration makes it possible to spray the washing liquid over a wide range. If (ab) / h is larger than 4, there are problems that the water to be ejected breaks or the distance decreases.

In particular, the sixth aspect of the invention relates to the flow path upstream of the discharge port of the circulation path of the fourth aspect of the invention, with the longitudinal width of the discharge port being a, the width of the flow path upstream of the discharge port being b, 4> (ab) / h> 2 where h is the distance between the outlet and the channel having a small cross-sectional area at the upstream position of the discharge port.

As described above, since the washing machine according to the present invention can improve washing performance by suppressing washing unevenness, it can be applied to a washing and drying machine, and also to a washing machine for business use as well as a washing machine for home use. Can be applied.

DESCRIPTION OF SYMBOLS 1 Case 3 Water tank 7 Washing and dewatering tank 8 Pulsator 9 Motor 10 Circulating water channel 11 Discharge port 12 Rib 14 Circulating water channel cover 18 Blade 19 Pump chamber

Claims

Washing and dewatering tank,
A pulsator rotatably disposed at the bottom of the washing and dewatering tank;
Blades provided on the lower surface side of the pulsator;
A pump chamber formed on the outer periphery of the blade of the pulsator;
A circulation channel formed between the washing and dewatering tub and a circulation channel cover, having a discharge port for circulating the washing liquid from the pump chamber as the pulsator rotates, and discharging the washing liquid to the washing and dehydrating tub;
Formed in the pulsator, comprising a plurality of holes for guiding washing water to the lower surface side of the pulsator,
A washing machine in which a total area of the holes of the pulsator is set larger than a minimum cross-sectional area in the flow path of the circulation water channel.
The washing machine according to claim 1, wherein a minimum cross-sectional area in the flow path of the circulation channel is set smaller than an area of the discharge port.
The washing machine according to claim 1, wherein the flow path of the circulating water channel has a cross-sectional area at an upstream position reaching the discharge port set to be smaller than an area of the discharge port.
The washing machine according to claim 2, wherein the flow path of the circulation channel has a cross-sectional area at an upstream position reaching the discharge port set to a cross-sectional area smaller than an area of the discharge port.
The flow path upstream of the discharge port of the circulating water channel has a width in the longitudinal direction of the discharge port a, a width of a flow channel having a small cross-sectional area upstream of the discharge port, b, 4. The washing machine according to claim 3, wherein 4> (ab) / h> 2 is set, where h is a distance from a flow path having a small cross-sectional area at an upstream position to the discharge port.
The flow path upstream of the discharge port of the circulation water channel is defined as a width in the longitudinal direction of the discharge port, b as a width of a flow channel having a small cross-sectional area at the upstream position leading to the discharge port, and the discharge port and the discharge port. The washing machine according to claim 4, wherein 4> (ab) / h> 2 is set, where h is a distance from a flow path having a small cross-sectional area at an upstream position from the outlet to the discharge port.