TW201934837A - washing machine - Google Patents

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

FIELD OF THE INVENTION The present invention relates to a washing machine that performs various steps of washing, rinsing, and dehydrating.

BACKGROUND OF THE INVENTION Conventionally, in such a washing machine, a circulation water path has been proposed in the washing and dewatering tank, and the washing liquid in the washing and dewatering tank is circulated by using the circulating water path, and the laundry is sprayed from the upper part of the washing and dewatering tank The structure which improves washing performance while washing.

7 is a longitudinal sectional view of a conventional washing machine disclosed in Japanese Patent Laid-Open No. 7-31785.

In FIG. 7, a plurality of circulating water passage covers 56 a and 56 b are provided on the inner surface of the washing and dewatering tank 53, and a plurality of circulating water passages 57 a and 57 a 57b.

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 paths 57a, 57b. Openings 60a and 60b are formed in the upper part of the circulation water paths 57a and 57b, respectively, and open toward the inside of the washing and dewatering tank 53. A cuttings filter 62 is installed in the opening 60 of the circulating water path 57a, and the cuttings are removed from the washing liquid circulating in the circulating water path 57a. In addition, the opening 60b of the circulating water path 57b is provided with a structure in which a sprinkler nozzle 61 is provided to spray the washing liquid sprayed from the opening 60b to the washing and dewatering tank 53 far away.

The motor 63 drives the stirring blade 52 through a V-belt and a reduction mechanism 65. The water level sensor 66 is connected to the lower part of the water holding tank 51 to detect the water level in the washing and dewatering tank 53 and inputs its output to the control device 67.

In the above configuration, in the washing step, 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 tank 53 are stirred. The blade 58 rotates with the stirring blade 52, and the washing liquid between the stirring blade 52 and the washing and dewatering tank 53 is pushed to the outside by the centrifugal force caused by the rotation of the blade 58. The washing liquid pushed out to the outside passes through the circulation water paths 57 a and 57 b and is sprayed into the washing and dewatering tank 53 from the water spray nozzle 61 and the thread filter 62. As a result, a large amount of washing liquid is sprayed on the laundry in the washing and dewatering tank 53 from above.

However, in the structure disclosed in Japanese Patent Laid-Open No. 7-31785, there is a problem that the washing liquid is sprayed on only a part of the laundry and cannot be sprayed on the entire laundry.

In response, other washing machines have been proposed in Japanese Patent Laid-Open No. 2016-097233.

FIG. 8 is a cross-sectional view of main parts of a circulating water path portion of a conventional washing machine as disclosed in Japanese Patent Laid-Open No. 2016-097233 from a front perspective.

In FIG. 8, a T-shaped circulating water path cover 72 is provided on the side wall of the washing and dewatering tank 71, and a circulating water path 73 is formed between the washing and dewatering tank 71 and the circulating water path cover 72. The circulating water path 73 is composed of a side water path 79 and an upper water path 80, and a central discharge port 74, a left discharge port 75, and a right discharge port 76 are formed in the upper water path 80. After the pulsator 77 at the bottom of the washing and dewatering tank 71 rotates, the washing water will circulate in the circulating water channel 73, and the washing liquid will rise in the side water channel 79, and flow to the upper water channel 80, from the central outlet 74 and the left outlet 75 and the right ejection outlet 76 are sprayed toward the laundry in the washing and dewatering tank 71.

After the washing step is started, the washing liquid in which the lotion is dissolved is pushed out of the pump chamber 78 by the centrifugal force caused by the rotation of the blades in the lower part of the pulsator 77, and flows to the circulating water path 73. The washing liquid rises in the side water passage 79, flows to the upper water passage 80, and is sprayed from the central discharge outlet 74, the left discharge outlet 75, and the right discharge outlet 76 toward the laundry in the washing and dewatering tank 71.

A plurality of through holes 81 are formed on the side surface of the washing and dewatering tank 71, and a fluid balancer 82 is provided on the upper peripheral edge.

SUMMARY OF THE INVENTION However, in the configuration of Patent Document 2, although the washing liquid is sprayed on the entire laundry, there is a possibility that uneven washing may occur when the laundry located above the water surface stays on the water surface. In addition, it is necessary to arrange a circulating water path 73 below the fluid balancer 82, and there is a problem that the volume of parts increases, the cost becomes high, and the diameter of the washing and dewatering tank 71 is not suitable.

The invention provides a low-cost washing machine which can prevent uneven washing and improve washing performance.

The washing machine of the present invention includes: a washing and dewatering tank; a pulsator, which is rotatably arranged at the bottom of the washing and dewatering tank; a blade, which is provided on the lower surface side of the pulsator; a pump chamber, which is formed on the outer periphery of the pulsator blade; The circulating water path is formed by the washing and dewatering tank and the circulating water path cover, and the washing liquid is circulated from the pump chamber along with the rotation of the pulsator, and has a discharge port for discharging the washing liquid to the washing and dewatering tank; and a plurality of holes It is formed in the pulsator to guide the washing water to the lower surface side of the pulsator, and the total area of the pulsator holes is set to be larger than the minimum cross-sectional area in the flow path of the circulating water path.

With this configuration, the agitation efficiency of the laundry can be improved, uneven washing can be improved, and washing performance can be improved.

Embodiments for Carrying Out the Invention Embodiments of the present invention will be described below with reference to the drawings. The present invention is not limited to the embodiments.
(First Embodiment)

Hereinafter, the washing machine in the first embodiment of the present invention will be described together with the drawings.

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

In FIG. 1, a water tank 3 is rotatably supported in a housing 1 by a vibration-proof spring 2. A washing and dewatering tank 7 capable of accommodating laundry is rotatably supported in the water tank 3. The washing and dewatering tank 7 is rotatably supported around the washing and dewatering shaft 4, and a pulsator 8 having a plurality of holes 13 is rotatably supported on the inner bottom of the washing and dewatering tank 7. The hole 13 penetrates the pulsator 8 and communicates above and below the pulsator 8.

The washing and dewatering tank 7 is provided with a plurality of dewatering holes 5 on the side wall, and an annular fluid balancer 6 for reducing dehydration vibration is installed on the upper part. A pair of circulating water path covers 14 are provided on the washing and dewatering tank 7 at opposite positions of the side walls, and a circulating water path 10 is formed between the side surface of the washing and dewatering tank 7 and the circulating water path cover 14. By installing a pair of circulating water path covers 14 in the washing and dewatering tank 7, two circulating water paths 10 are formed. In order to suppress the occurrence of imbalance when the washing and dewatering tank 7 rotates, the circulating water passages 10 should be formed in the same shape, but the shapes can also be different as needed.

A motor 9 is arranged at the bottom of the water tank 3, and a clutch mechanism and a brake mechanism are built in the motor 9. During the washing operation, the motor 9 brakes the dewatering shaft of the washing and dewatering shaft 4 and drives the washing shaft of the washing and dewatering shaft 4 to rotate the pulsator 8. During the dehydration operation, the motor 9 will release the brake of the dehydration shaft to rotate the washing and dewatering tank 7 and open the drain valve 26 to pass the washing liquid or flushing liquid in the water tank 3 from the drain port 25 through the drain valve 26 Drain out the machine.

The blade 18 is integrally formed on the lower surface side of the pulsator 8. 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 circulated in the circulation water path 10. The washing water circulating in the circulation water path 10 is discharged from the discharge port 11 of the circulation water path 10 located at the upper part of the washing and dewatering tank 7 and sprayed into the washing and dewatering tank 7.

An operation display section 23 is provided on the upper portion of the front face of the casing 1, and the control device 24 is provided below the operation display section 23 in the casing 1. The control device 24 includes a control unit (not shown) composed of a microcomputer to control the rotation of the motor 9 and the opening and closing of the water supply valve 22 and the drain valve 26, and sequentially controls a series of steps of washing, washing, and dehydration. . As shown in FIG. 1, a water supply valve 22 that supplies water to the washing and dewatering tank 7 is provided at the rear of the housing 1.

Next, the circulating water channel 10 and the circulating water channel cover 14 will be described with reference to FIGS. 3 to 6. As shown in FIGS. 3 and 4, a discharge port 11 is formed in the circulating water path cover 14 at a position corresponding to the upper part and the middle part of the washing and dewatering tank 7. The discharge port 11 may be formed only at a position corresponding to the upper portion of the washing and dewatering tank 7.

A rib 12 protruding toward the washing and dewatering tank 7 is formed on the back surface of the circulating water path cover 14, and the circulating water path 10 is defined by abutting the rib 12 against the inner surface of the washing and dewatering tank 7. The circulating water path 10 can adjust the flow rate and flow velocity by changing the width of the rib 12 or changing the width of the circulating water path cover 14 in the depth direction.

By setting the minimum cross-sectional area of each of the circulation channels 10 to be larger than the area of the upper outlet 11, the pressure loss can be suppressed, and the discharge range of the washing liquid sprayed from the upper outlet 11 can be expanded. .

As shown in FIG. 6, in this embodiment, each circulating water channel 10 is formed at an upstream position immediately before reaching the upper outlet 11, and the cross-sectional area of the flow channel is formed to be larger than the area of the upper outlet 11. narrow. For example, in each of the circulating water paths 10, the width of the flow path is formed to be shorter than the length in the longitudinal direction of the discharge port 11 (width a in FIG. 6) in the upstream position immediately before reaching the upper discharge port 11. The length (width b in FIG. 6), and the position of the width b which has been formed to be shorter than the width a in the longitudinal direction of the discharge port 11 is made closer to the discharge port 11 (interval h in FIG. 6).

With this configuration, each of the circulation water paths 10 is configured such that a flow path having a smaller cross-sectional area than that of the upper outlet 11 is formed in an upstream position immediately before reaching the outlet 11 to suppress pressure loss, and The water sprayed from the upper outlet 11 is wide-angled.

The difference (ab) between the width a in the longitudinal direction of the discharge port 11 and the width b of the narrow flow path in the upstream side of the discharge port 11 is set to be very large, and is even close to the narrow flow of the discharge port 11 to the width b. The interval h of the road can spray the washing liquid in a wide range.

In order to discharge the washing liquid from the discharge port 11 located on the upper side in a wide range and efficiently supply the washing liquid to the laundry, it is necessary to set the flow rate of the circulating washing liquid and the cross-sectional area of the flow path of the circulating water path 10 to the most appropriate.

When the difference (ab) between the width a in the longitudinal direction of the discharge port 11 and the width b of the narrow flow path in the upstream side of the discharge port 11 is excessively large, the water sprayed from the discharge port 11 is branched, or is discharged from the discharge port 11. The spitting distance of the outlet 11 is reduced.

When the difference (ab) between the width a in the longitudinal direction of the discharge port 11 and the width b of the narrow flow path in the upstream position immediately before the discharge port 11 is too small, the washing liquid discharged from the discharge port 11 will not expand. To full spitting range.

When the interval h between the discharge port 11 and the narrow flow path of the width b is too long, the effect of narrowing the cross-sectional area of the flow path cannot be exerted, and the distance to be discharged from the discharge port 11 is reduced.

When the interval h between the discharge port 11 and the narrow flow path of the width b is too short, the washing liquid discharged from the discharge port 11 will not expand to a sufficient discharge range.

As a result of various experiments, it was learned that by setting the width a, width b, and interval h to be 4> (a-b) / h> 2, it is possible to spray a wide range of washing liquid.

In the above formula, if (a-b) / h is set to be larger than 4, the water sprayed from the discharge port 11 will branch, or the distance to be discharged from the discharge port 11 will decrease. Conversely, if (a-b) / h is set to be smaller than 2, the washing liquid discharged from the discharge port 11 will not expand to a sufficient discharge range.

In this embodiment, the cross-sectional area of the flow path is changed by adjusting the width of the flow path. However, the cross-sectional area may be changed by adjusting the interval between the circulation water path cover 14 and the washing and dewatering tank 7 of the flow path. It is also possible to adjust the two to change the cross-sectional area of the flow path.

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

In the washing step, after the laundry is put into the washing and dewatering tank 7 and activated, the water supply valve 22 will be activated to make the water enter a predetermined height of the water tank 3, and then the pulsator 8 will rotate to start the laundry operation.

After the washing operation is started, the blades 18 will also rotate with the rotation of the pulsator 8, and the washing water will rise from the pump chamber 19 in the circulating water path 10 by the centrifugal force caused by the rotation of the blades 18, and from the outlet 11 Sprayed on the laundry in the washing and dewatering tank 7.

At this time, by the centrifugal force caused by the rotation of the blades 18 of the pulsator 8, the washing water is pushed toward the outer peripheral side, and the washing water is drawn to the circulation water path 10. Thereby, the washing water in the washing and dewatering tank 7 is pulled 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 total of the minimum cross-sectional areas in the flow paths of the two circulation water paths 10. Therefore, the water flow flowing from the hole 13 of the pulsator 8 to the lower surface side of the pulsator 8 increases, and the water flow drawn into the laundry increases, so that the effect of the laundry being pulled under the water surface increases.

In addition, since the convection of the washing water in the washing and dewatering tank 7 is increased, the convection efficiency of the laundry is improved, and the laundry that appears on the water surface by the convection of the washing water can also be discharged from the outlet 11 Spray the washing liquid continuously. In particular, in the case of having a function of raising the water temperature and performing the washing step with warm water, the temperature of the laundry on the water surface can be prevented from decreasing to reduce uneven washing.

In the conventional configuration, it is considered to increase the number of rotations of the pulsator. However, in this configuration, the vortex caused by the rotation of the pulsator becomes stronger than the water flow drawn toward the lower surface side of the pulsator. Therefore, although the water flow that pulls the laundry under the water surface becomes stronger, the water flow that is pushed up to the water surface is weak, so the efficiency of spraying the washing liquid on the laundry is reduced.

In view of the above, the washing machine in this embodiment can agitate the laundry in the washing and dewatering tank 7 while spraying the washing liquid evenly from above, thereby suppressing uneven washing and improving washing performance.

As described above, the first invention is provided: a washing and dewatering tank; a pulsator is rotatably arranged at the bottom of the washing and dewatering tank; a blade is provided on the lower surface side of the pulsator; a pump chamber is formed in the pulsator The outer periphery of the blade; and a circulating water path formed between the washing and dewatering tank and the circulating water path cover. The washing liquid is circulated from the pump chamber along with the rotation of the pulsator, and it has a spit for discharging the washing liquid to the washing and dewatering tank. Export. In addition, a plurality of holes are formed in the pulsator to guide the washing water to the lower surface side of the pulsator, and the total area of the pulsator holes is set to be larger than the minimum cross-sectional area in the flow path of the circulating water channel. Big.

With this configuration, the flow of water drawn into the laundry is increased, and the stirring efficiency of the washed laundry is drawn below the water surface. In addition, since the drawn-in water flow will be drawn into the circulating water path following the water flow previously drawn to the circulating water path, the washing liquid may be continuously sprayed on the laundry newly appearing on the water surface.

In the second invention, in particular, the minimum cross-sectional area in the flow path of the circulation water passage of the first invention is set to be smaller than the area of the discharge outlet.

With this structure, since the drawn-in water flow will be drawn into the circulating water path following the water flow previously drawn to the circulating water path, the pressure loss along the path can still be kept to a minimum for washing clothes newly appearing on the water surface. And spray the washing liquid continuously.

In the third invention, in particular, in the flow path of the circulation waterway of the first invention, the cross-sectional area in the upstream position of the discharge port is set to be smaller than the area of the discharge port.

With this configuration, the length in the direction to be expanded is shortened just before the arrival, so that the washing liquid can be sprayed to a wide range of laundry.

In the fourth invention, in particular, in the flow path of the circulation waterway of the second invention, the cross-sectional area in the upstream position of the discharge port is set to be smaller than the area of the discharge port.

With this configuration, the length in the direction to be expanded is shortened just before the arrival, so that the washing liquid can be sprayed to a wide range of laundry.

According to the fifth invention, when 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, and the flow path with a small cross-sectional area at the upstream position of the discharge port and the discharge port is small. When the interval is h, the flow path upstream of the discharge port of the circulation path of the third invention is set to 4> (ab) / h> 2.

With this configuration, the washing liquid can be sprayed over a wide range. In addition, if (a-b) / h is greater than 4, there is a problem that the spouted water will branch, or the distance will be reduced.

In the sixth invention, in particular, when 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, and the cross-sectional area at the upstream position of the discharge port and the discharge port is small. When the interval is h, the flow path upstream of the discharge port of the circulation path of the fourth invention is set to 4> (ab) / h> 2.

With this configuration, the washing liquid can be sprayed over a wide range. In addition, if (a-b) / h is greater than 4, there is a problem that the spouted water will branch, or the distance will be reduced.

As described above, since the washing machine of the present invention can suppress uneven washing and improve washing performance, it can also be applied to washing and drying machines, and can be applied to not only domestic washing machines but also business washing machines.

1‧‧‧shell

2‧‧‧Anti-vibration spring

3‧‧‧ sink

4‧‧‧washing and dewatering shaft

5‧‧‧ Dehydration hole

6, 82‧‧‧ fluid balancer

7, 53, 71‧‧‧‧washing and dewatering tank

8, 77‧‧‧ pulsator

9, 63‧‧‧ Motor

10, 57a, 57b, 73‧‧‧ circulating waterway

11‧‧‧ Spit Out

12‧‧‧ rib

13‧‧‧hole

14, 56a, 56b, 72‧‧‧ circulating waterway cover

18, 58‧‧‧ Blade

19, 59, 78‧‧‧ pump room

22‧‧‧ Water supply valve

23‧‧‧ Operation display

24, 67‧‧‧ Control device

25‧‧‧drain

26‧‧‧Drain valve

51‧‧‧ sink

52‧‧‧ Stirring Blade (Stirring Blade)

60a, 60b‧‧‧ opening

61‧‧‧Sprinkler nozzle

62‧‧‧Line filter

65‧‧‧ Reduction mechanism

66‧‧‧Water Level Sensor

73‧‧‧Laundry

74‧‧‧ Central Spit Exit

75‧‧‧Left-spit exit

76‧‧‧Exit right

79‧‧‧ side waterway

80‧‧‧ Upper Waterway

81‧‧‧ through hole

a, b‧‧‧ width

h‧‧‧ interval

Fig. 1 is a longitudinal sectional view of a washing machine in a first embodiment of the present invention.

Fig. 2 is a perspective view of a pulsator of a washing machine in the first embodiment of the present invention.

Fig. 3 is a plan view showing a front surface of a circulating water path cover of the washing machine in the first embodiment of the present invention.

Fig. 4 is a plan view showing a back surface of a circulating water path cover of the washing machine in the first embodiment of the present invention.

Fig. 5 is a plan view showing a main part of a front surface of a circulating water path cover of the washing machine in the first embodiment of the present invention.

Fig. 6 is a plan view showing a main part of a back surface of a circulating water path cover of the washing machine in the first embodiment of the present invention.

Fig. 7 is a longitudinal sectional view of a conventional washing machine.

8 is a cross-sectional view of a main part of another conventional washing machine.

Claims (6)

A washing machine having: Washing and dewatering tank; The pulsator is rotatably arranged at the bottom of the washing and dewatering tank; A blade provided on the lower surface side of the pulsator; A pump chamber formed on the outer periphery of the blade of the pulsator; The circulating water path is formed between the washing and dewatering tank and the circulating water path cover, and the washing liquid is circulated from the pump chamber along with the rotation of the pulsator. Export; and A plurality of holes are formed in the pulsator to guide washing water to the lower surface side of the pulsator, The total area of the holes of the pulsator is set to be larger than the minimum cross-sectional area of the flow path of the circulation water path. In the washing machine of claim 1, the minimum cross-sectional area in the flow path of the circulation water path is set to be smaller than the area of the discharge port. The washing machine according to claim 1, wherein the flow path of the circulation water path is to set a cross-sectional area in an upstream position reaching the discharge port to be smaller than an area of the discharge port. The washing machine according to claim 2, wherein the flow path of the circulation water path is to set a cross-sectional area in an upstream position reaching the discharge port to be smaller than a cross-sectional area of the discharge port. The washing machine of claim 3, wherein the width in the longitudinal direction of the discharge port is a, the width of the flow path with a small cross-sectional area that reaches the upstream position of the discharge port is b, and When the interval of the flow path with a small cross-sectional area at the upstream position of the discharge port is h, the flow path at the upstream position of the discharge port of the circulation water path is set to 4> (ab) / h> 2. The washing machine of claim 4, wherein the width in the longitudinal direction of the discharge port is a, the width of the flow path with a small cross-sectional area that reaches the upstream position of the discharge port is b, and the discharge port and the discharge port When the interval of the flow path with a small cross-sectional area from the outlet to the upstream position of the discharge port is h, the flow path at the upstream position of the discharge port of the circulation water path is set to 4> (ab) / h> 2.