WO2019047918A1

WO2019047918A1 - Washing machine and control method therefor

Info

Publication number: WO2019047918A1
Application number: PCT/CN2018/104582
Authority: WO
Inventors: 张娟娟; 王玲臣; 孙广彬; 程宝珍
Original assignee: 青岛海尔洗衣机有限公司
Priority date: 2017-09-07
Filing date: 2018-09-07
Publication date: 2019-03-14

Abstract

Provided are a washing machine and a control method therefor, wherein the washing machine comprises: an inner drum (12), a water-discharge central hole (121) being provided at the bottom of the inner drum (12); and a filter (11), which is fixed at the bottom of the inner drum (12) and has an outer diameter that is larger than the diameter of the water-discharge central hole (121).

Description

Washing machine and control method thereof

This application requires the application date to be September 7, 2017, the application number is 201710800413.1, the name is "a washing machine with self-cleaning filter and its control method" and the application date is September 7, 2017, and the application number is 201710800770.8 The priority of the Chinese Patent Application, which is incorporated herein by reference in its entirety in its entirety in its entirety in its entirety in the the the the the the the the the

Technical field

The present disclosure relates to the field of washing equipment technology, for example, to a washing machine and a control method therefor.

Background technique

With the improvement of people's living standards, washing machines have become one of the main home appliances in people's daily life. The wave wheel automatic washing machine is favored by many consumers because of its short washing time and clean washing. In the washing process, the washing machine and the clothes are rubbed to produce the wire scraps. The wire scraps are attached to the inner tub of the washing machine and the barrel wall of the outer tub along with the movement of the washing water. For a long time, the wire scraps are accumulated more, which is not only easy to breed. Bacteria affect the flow of washing water, and some of the swarf on the wall of the barrel enters the washing water during the next washing, causing secondary pollution of the washing water, which seriously affects the cleanliness of the laundry and the health of the user. In addition, the thread can not be rinsed clean, after drying, most of the thread is stuck on the clothes, causing pollution, and it is difficult to remove the clothes after drying.

The washing machine of the related art is provided with a filter on the side wall of the inner tub, and the water is introduced from the bottom or the side through the water chamber on the side wall to realize the filtering function, but the filter and the water chamber are disposed on the side wall of the inner tub, which not only occupy the inner tub The volume reduces the space for accommodating the clothes, and is not completely filtered by the water level and the water flow speed. In addition, it is difficult to continue collecting the swarf after the filter collects the swarf. After the washing, the user needs to manually remove the filter. The cleaning is carried out, the labor intensity is large, and the filter is easily damaged by repeated disassembly.

Summary of the invention

The present disclosure provides a washing machine and a control method thereof, which can solve the technical problem that the wire in the washing water is difficult to handle in the related art, the space occupied by the filtering device in the washing machine is large, and the labor intensity of the manual cleaning is large.

A washing machine comprising: an inner tub, a bottom of the inner tub is provided with a drainage center hole; and a filter, the filter is fixed to the bottom of the inner tub, and an outer diameter of the filter is larger than a diameter of the drain center hole.

A method of controlling a washing machine, comprising:

In the washing or rinsing stage, with the pulsator of the washing machine rotating, the washing water is returned from the inside of the inner tub through the first circulation route, or simultaneously to the interior of the inner tub via the first circulation route and the second circulation route. Forming a cycle to achieve the collection of lint in the wash water at the filter; and

In the draining stage, the washing water is sequentially discharged from the inside of the inner tub through the drain center hole of the bottom of the inner tub and the filter, and then discharged from the drain pipe to realize washing water to wash the filter;

Wherein, the first circulation route is that the washing water is sequentially passed from the inside of the inner tub through the gap between the inner tub and the outer tub, the filter, the drainage center hole at the bottom of the inner tub, and then returned to the inner barrel The second circulation route is that the washing water is sequentially passed from the inside of the inner tub through the opening of the bottom of the inner tub, the filter, the drainage center hole at the bottom of the inner tub, and back to the inside of the inner tub.

DRAWINGS

1 is a schematic structural view of a washing machine provided in Embodiment 1;

Figure 2 is an enlarged view of a portion C in Figure 1;

Figure 3 is a schematic structural view of the filter of Figure 1;

Figure 4 is a partial exploded view of Figure 1;

Figure 5 is a schematic structural view of a washing machine provided in Embodiment 2;

Figure 6 is a partial structural view of the inner tub of Figure 5;

Figure 7 is a side elevational view of Figure 6;

Figure 8 is an enlarged view of a portion C in Figure 5;

9 is a schematic structural view of a washing machine provided in Embodiment 3;

Figure 10 is an enlarged view of the portion D in Figure 9;

Figure 11 is a schematic view showing another structure of the washing machine provided in the third embodiment;

Figure 12 is an enlarged view of the portion D in Figure 11;

Figure 13 is a schematic structural view of a filter provided in Embodiment 3;

Figure 14 is a partial exploded structural view of the third embodiment;

Figure 15 is a schematic structural view of a washing machine provided in Embodiment 4;

Figure 16 is an enlarged view of E in Figure 15;

Figure 17 is a schematic view showing another structure provided in the fourth embodiment;

Figure 18 is an enlarged view of E in Figure 17;

19 is a schematic structural view of a filter provided in Embodiment 4;

Figure 20 is a partial exploded structural view of the fourth embodiment;

21 is a flow chart of a method of controlling a washing machine according to an embodiment.

In the picture:

11, filter; 12, inner barrel; 13, outer barrel; 14, flange; 15, screw;

111, through hole; 112, card convex; 113, curling; 114, water hole; 115, mounting hole; 116, reinforcing rib;

121, drainage center hole; 122, opening;

141, card hole.

Detailed ways

Embodiment 1

Referring to Fig. 1, a washing machine having a self-cleaning filter, the filter 11 is fixed to the bottom of the inner tub 12 of the washing machine, and the outer diameter of the filter 11 is larger than the diameter of the drain center hole 121 at the bottom of the inner tub 12. The central axis of the drainage center hole 121 coincides with the central axis of the filter 11. The washing water flows from the bottom of the filter 11 through the filter 11 into the inner tub 12 to circulate, thereby achieving the filtering action of the filter 11; the washing water flows through the filter center 11 through the drain center hole 121 to perform drainage, thereby realizing the self-cleaning action of the filter 11. .

The filter 11 is fixed to the bottom of the inner tub 12 of the washing machine to avoid occupying the volume of the inner tub 12; the outer diameter of the filter 11 is larger than the diameter of the drainage center hole 121 at the bottom of the inner tub 12, ensuring that the washing water passes through the filter 11 during the flow, so that the filtering is further improved. Thoroughly; as the pulsator of the washing machine rotates, the washing water passes through the gap between the inner tub 12 and the outer tub 13 from the inside of the inner tub 12, the filter 11, the bottom of the inner tub 12, and then returns to the inside of the inner tub 12 to form a circulation, in the washing water. The lint is collected at the filter 11, as indicated by the direction of the arrow in Fig. 1; in the draining stage, the washing water is sequentially discharged from the inside of the inner tub 12 through the bottom of the inner tub 12, the filter 11, and discharged from the drain pipe, and the washing water is filtered. The device 11 is flushed; the pollution caused by the accumulation of the chips is avoided, the manual filter 11 is not required to be cleaned, the labor intensity is reduced, and the damaged filter 11 is prevented from being repeatedly removed.

Referring to FIG. 2, the filter 11 has an umbrella-like structure with a low middle edge and a first gap A between the edge of the filter 11 and the bottom of the inner tub 12. During the washing process, the washing water moves toward the side wall of the inner tub 12 by the centrifugal force due to the rotation of the pulsator, and a low pressure region is formed at the center position of the pulsator, and the washing water flows through the gap between the inner tub 12 and the outer tub 13. To the bottom of the filter 11, the umbrella structure is arranged to facilitate the flow of washing water along the surface of the filter 11 toward the center of the filter 11, so that the washing water flows back to the inner tub 12; during the draining process, the water flowing out of the drain center hole 121 flushes the filter 11 The arrangement of the umbrella structure facilitates the smooth discharge of the discharged water, and the washed swarf is also convenient to flow down and discharge along the filter 11, and the umbrella structure and the gap A cooperate to facilitate drainage.

In the present embodiment, the filter 11 is an injection molded piece with a strainer, the filter 11 has an umbrella structure with an upper portion higher than the edge, and a second position between the filter 11 and the bottom of the inner tub 12 is provided with a second Clearance B. The second gap B is larger than 2 mm, and the second gap B cannot be too small, otherwise it is easy to pinch the chips. In the direction away from the center of the washing machine, the second gap B can only be larger and larger, and cannot be a sharp-angled structure, otherwise it is easy to clamp the wire and it is difficult to rinse off when draining.

Referring to FIG. 3 and FIG. 4, the filter 11 is a frame provided with a plurality of through holes 111, and the plurality of through holes 111 are evenly spaced around the center of the filter 11, and the filter screen seals the plurality of through holes 111, so that the washing water passes through the filter. network. The filter 11 is engaged with the flange 14 at the bottom of the inner tub 12. The filter 11 is provided with a plurality of latches 112 on the surface of the flange 14. The flange 14 is provided with a card hole 141 at a position opposite to the latch 112. The protrusion 112 cooperates with the card hole 141 to facilitate installation and disassembly. The frame, the card protrusion 112 and the filter mesh are integrally injection molded, which is convenient for processing and production. The flange 14 is attached to the bottom of the inner tub 12 by screws 15, and the filter 11 is snapped to the bottom of the flange 14.

The first gap A and the second gap B are gaps between the filter 11 and the flange 14 at the bottom of the inner tub 12.

The washing machine provided in this embodiment further includes a drain valve. When the washing machine is draining, the drain valve is opened, and the washing water in the washing machine flows through the filter center 11 through the drain center hole 121 to drain.

Embodiment 2

Referring to FIGS. 5-8, the present embodiment provides a washing machine, wherein the same or corresponding components as in the first embodiment are given the same reference numerals as in the first embodiment. For the sake of brevity, only the differences will be described. The difference between this embodiment and the first embodiment is that the filter 11 is fixed to the bottom of the inner tub 12 of the washing machine, the outer diameter of the filter 11 is larger than the diameter of the drainage center hole 121 at the bottom of the inner tub 12, and the bottom of the inner tub 12 is opened on the side. There is an opening 122 provided for the passage of wash water. The washing water flows from the bottom of the filter 11 through the filter 11 into the inner tub 12 to circulate, and the filtering action of the filter 11 is realized. The washing water flows from the drainage center hole 121 through the filter 11 to drain the water to realize the self-cleaning action of the filter 11.

The filter 11 is fixed to the bottom of the inner tub 12 of the washing machine to avoid occupying the volume of the inner tub 12; the outer diameter of the filter 11 is larger than the diameter of the drainage center hole 121 at the bottom of the inner tub 12, ensuring that the washing water passes through the filter 11 during the flow, so that the filtering is further improved. Thoroughly; with the pulsator of the washing machine rotating, the washing water passes from the inside of the inner tub 12 through the gap between the inner tub 12 and the outer tub 13, the filter 11, the bottom of the inner tub 12, and then returns to the inside of the inner tub 12 to form a first circulation route, washing The lint in the water is collected at the filter 11, and at the same time, as indicated by the direction of the arrow in Fig. 1, the washing water passes through the opening 122 at the bottom of the inner tub 12, the bottom of the filter 11 and the inner tub 21 from the inside of the inner tub 12, and then back. The inside of the inner tub 12 forms a second circulation route; the second circulation route shortens the water circulation path, ensures the water flow speed and impact force, ensures that most of the water is discharged from the opening 122, and returns directly to the inner tub 12 through the filter 11 downward. Further improve the filtering effect. In the draining stage, the washing water is discharged from the inside of the inner tub 12 through the bottom of the inner tub 12 and the filter 11 from the drain pipe, and the washing water is flushed to the filter 11; the contamination caused by the accumulation of the scraps is avoided, and the filter 11 is not required to be manually cleaned. , reduce labor intensity, and avoid damaging the filter 11 multiple times.

The inner tub 12 includes an inner tub wall and an inner tub bottom. Referring to Figures 5-7, the opening 122 is disposed on the side of the inner tub bottom. The opening 122 may be provided in plurality as needed, and the plurality of openings 122 are evenly spaced around the center line of the inner tub. In the present embodiment, the openings 122 may be two.

Embodiment 3

The same or corresponding components in the embodiment as those in the first embodiment and the second embodiment are given the same reference numerals as in the first embodiment and the second embodiment. Referring to Fig. 9 to Fig. 14, for the sake of brevity, only the differences between the embodiment and the second embodiment and the first embodiment will be described. Referring to FIG. 9 , FIG. 10 , FIG. 13 and FIG. 14 , the difference between this embodiment and the second embodiment is shown in FIG. 11 to FIG. 14 , wherein the embodiment and the embodiment are used. The difference between the first embodiment and the second embodiment is that the filter 11 is a stainless steel plate, and the plurality of water holes 114 are opened on the stainless steel plate, and the plurality of water holes 114 are evenly distributed on the stainless steel plate. . During the circulation, the washing water passes through the filter 11, and the water flows through the water passing hole 114, and the wire dust adheres to the bottom surface of the stainless steel plate. When the washing water washes the stainless steel plate, the surface of the stainless steel plate is smooth and easy to be washed. In the present embodiment, the diameter of the water passing hole 114 is between 4 and 6 mm.

Referring to Figures 9-14, a bead 113 is provided at the edge of the stainless steel plate, and the bead 113 is formed by bending the edge of the stainless steel plate away from the bottom of the inner tub 12. The provision of the bead 113 causes the edge to be thickened, increasing the strength and service life of the filter 11, and is not easily bent during the mounting process. The setting of the curling edge 113 also makes the original sharp edge of the stainless steel plate not exposed, so it will not cause damage to the handling and installation personnel.

Referring to Figures 10, 12 and 13, the flange 14 is mounted to the bottom of the inner tub 12 by screws 15, and the filter 11 is connected to the flange 14 at the bottom of the inner tub 12 by screws 15, and the stainless steel plate is provided with a plurality of installations through the stainless steel plate. The hole 115 and the mounting hole 115 may be a light hole or a threaded hole.

Embodiment 4

The same or corresponding components of the embodiment as in the third embodiment are given the same reference numerals as in the third embodiment. For the sake of brevity, only the differences between the present embodiment and the third embodiment will be described. Referring to FIG. 15 to FIG. 20, the difference between the embodiment and the third embodiment is that the filter 11 is a stainless steel plate, and the ribs 116 are disposed at the edges of the stainless steel plate. The cross-sectional shape of the ribs 116 is U-shaped, and the reinforcing ribs 116 covers the edge of the stainless steel plate, and the rib 116 is formed by injection molding. The arrangement of the ribs 116 causes the edges to be thickened, increasing the strength and service life of the filter 11, and is not easily bent during the mounting process. The setting of the rib 116 also makes the original sharp edge of the stainless steel plate not exposed, so it will not cause damage to the handling and installation personnel.

Embodiment 5

The embodiment provides a control method for a washing machine, which is implemented by using the washing machine provided by any of the above embodiments. Referring to FIG. 21, the control method of the washing machine includes:

In S10, in the washing or rinsing stage, as the pulsator of the washing machine rotates, the washing water is circulated from the inside of the inner tub 12 through the first circulation route to the inside of the inner tub 12 to realize the swarf in the washing water. Filter 11 is collected; and

In S20, in the draining stage, the washing water is sequentially discharged from the inside of the inner tub 12 through the drain center hole 121 and the filter 11 at the bottom of the inner tub 12, and then discharged from the drain pipe to wash the filter 11 with the washing water.

The first circulation route is that the washing water passes through the gap between the inner tub 12 and the outer tub 13 from the inside of the inner tub 12, the filter 11, the drainage center hole 121 at the bottom of the inner tub 12, and then returns to the The inside of the inner tub 12 is described.

During the washing or rinsing phase, most of the lint in the wash water adheres to the bottom of the filter 11, and during the draining phase, the water rushes off the swarf attached to the bottom of the filter 11, and is discharged from the drain through the drain valve. The pollution caused by the accumulation of the swarf is avoided, the manual filter 11 is not required to be cleaned, the labor intensity is reduced, and the damaged filter 11 is prevented from being repeatedly removed.

Embodiment 6

The embodiment provides a control method for the washing machine, which is implemented by using the washing machine provided in the second embodiment, the third embodiment or the fourth embodiment. Referring to Figure 21, the control method includes the following steps:

In S10, in the washing or rinsing stage, as the pulsator of the washing machine rotates, the washing water is circulated from the inside of the inner tub 12 through the first circulation route and the second circulation route to the inside of the inner tub 12 to realize circulation. The lint in the wash water is collected at the filter 11; and

In S20, in the draining stage, the washing water is sequentially discharged from the inside of the inner tub 12 through the drain center hole 121 and the filter 11 at the bottom of the inner tub 12, and then discharged from the drain pipe to wash the filter 11 with the washing water. In the draining stage, the drain valve is opened, so that the washing water can be discharged from the inside of the inner tub 12 through the drain center hole 121 at the bottom of the inner tub 12 and the filter 11, and then discharged from the drain pipe.

The first circulation route is that the washing water passes through the gap between the inner tub 12 and the outer tub 13 from the inside of the inner tub 12, the filter 11, the drainage center hole 121 at the bottom of the inner tub 12, and then returns. To the inside of the inner tub 12; the second circulation route is that the washing water passes through the opening 122 of the bottom of the inner tub 12, the filter 11, and the drainage center hole 121 at the bottom of the inner tub 12 from the inside of the inner tub 12, Returning to the inside of the inner tub 12.

As the pulsator of the washing machine rotates, there is a water circulation in the first circulation route and the second circulation route, and the setting of the second circulation route shortens the water circulation path, ensures the water flow speed and the impact force, and ensures most of the washing water from the opening 122. It is discharged, and is directly returned to the inner tub 12 through the filter 11 to further enhance the filtering effect.

Claims

A washing machine comprising:

An inner tub (12), a bottom of the inner tub (12) is provided with a drainage center hole (121); and

a filter (11) fixed to the bottom of the inner tub (12), the outer diameter of the filter (11) being larger than the diameter of the drain center hole (121).
The washing machine according to claim 1, wherein the filter (11) has an umbrella structure with an upper portion higher than an edge, and an edge between the edge of the filter (11) and the bottom of the inner tub (12) is provided A gap A.
A washing machine according to claim 2, wherein said filter (11) comprises a screen, and said filter (11) is an injection molded part, a predetermined position of the middle of said filter (11) A second gap B is disposed between the bottoms of the inner tubs (12).
The washing machine according to claim 3, wherein the filter (11) is a frame provided with a plurality of through holes (111), and the frame is integrally injection molded with the screen.
The washing machine according to claim 3, wherein the inner tub (12) includes a flange (14), the flange (14) is disposed at a bottom of the inner tub (12), and the filter (11) is The flange (14) is snapped.
The washing machine according to claim 2, wherein the filter (11) is a stainless steel plate having a plurality of water holes (114).
The washing machine according to claim 6, wherein the stainless steel plate comprises a bead (113), the bead (113) is provided at an edge of the stainless steel plate, and the bead (113) is made of the stainless steel The edge of the plate is curved to form away from the bottom of the inner tub (12).
The washing machine according to claim 6, wherein the stainless steel plate includes a reinforcing rib (116), the reinforcing rib (116) is disposed at an edge of the stainless steel plate, and a cross-sectional shape of the reinforcing rib (116) is U-shaped, the reinforcing rib (116) covers the edge of the stainless steel plate.
The washing machine according to claim 6, further comprising a screw (15) connected to the flange (14) at the bottom of the inner tub (12) by a screw (15).
The washing machine according to claim 1, wherein the bottom of the inner tub (12) is open on the side with an opening (122) provided for washing water to pass therethrough.
The washing machine according to claim 1, wherein a central axis of the drainage center hole (121) coincides with a central axis of the filter (11).
A method of controlling a washing machine, comprising:

During the washing or rinsing phase, the pulsator of the washing machine rotates, causing the washing water to pass from the inside of the inner tub (12) through the first circulation route, or simultaneously to the inner tub via the first circulation route and the second circulation route (12). a loop formed inside to achieve the collection of scraps in the wash water at the filter (11); and

In the draining stage, the washing water is sequentially discharged from the inside of the inner tub (12) through the drain center hole (121) at the bottom of the inner tub (12) and the filter (11), and is discharged from the drain pipe to achieve washing. Water is flushed to the filter (11);

Wherein, the first circulation route is that the washing water is sequentially passed from the inside of the inner tub (12) through the gap between the inner tub (12) and the outer tub (13), the filter (11), the inner tub (12) a drainage center hole (121) at the bottom, and returning to the inside of the inner tub (12); the second circulation route is an opening of the wash water from the inside of the inner tub (12) through the bottom of the inner tub (12) ( 122), the filter (11), a drainage center hole (121) at the bottom of the inner tub (12), and returning to the inside of the inner tub (12).