CN110904642A - Control method of washing machine - Google Patents
Control method of washing machine Download PDFInfo
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- CN110904642A CN110904642A CN201810985906.1A CN201810985906A CN110904642A CN 110904642 A CN110904642 A CN 110904642A CN 201810985906 A CN201810985906 A CN 201810985906A CN 110904642 A CN110904642 A CN 110904642A
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- inner tub
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- 238000005406 washing Methods 0.000 title claims abstract description 230
- 238000000034 method Methods 0.000 title claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 278
- 230000008569 process Effects 0.000 claims description 17
- 230000001133 acceleration Effects 0.000 claims description 10
- 230000002441 reversible effect Effects 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 24
- 230000000694 effects Effects 0.000 abstract description 14
- 229910001220 stainless steel Inorganic materials 0.000 description 16
- 239000010935 stainless steel Substances 0.000 description 16
- 230000003068 static effect Effects 0.000 description 9
- 230000003014 reinforcing effect Effects 0.000 description 7
- 238000001914 filtration Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 239000003657 drainage water Substances 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/10—Filtering arrangements
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
- D06F35/005—Methods for washing, rinsing or spin-drying
- D06F35/008—Methods for washing, rinsing or spin-drying for disinfecting the tub or the drum
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
The invention discloses a control method of a washing machine, the washing machine comprises an inner barrel, a wave wheel arranged in the inner barrel bottom and a filter arranged outside the inner barrel bottom, the washing machine is provided with a first water level higher than and close to the filter, the control method comprises the following steps: the washing machine controls water drainage and controls the inner barrel and/or the impeller to rotate at the position of the first water level, so that thread scraps are separated from the filter. In the above scheme, the filter and the washing water perform relative movement by controlling the inner barrel and/or the impeller to rotate at the position where the water is drained to be close to the filter, so that the thread scraps are favorably separated from the filter, and the inner barrel and/or the impeller are controlled to rotate at the lower water level, so that the thread scraps separated from the filter are prevented from entering the inner part of the inner barrel. The control method of the invention improves the cleaning effect of the filter and prevents thread scraps from remaining in the washing machine.
Description
Technical Field
The invention belongs to the field of household appliances, and particularly relates to a control method of a washing machine.
Background
The filter is arranged on the side wall of the inner barrel of the existing washing machine, the filtering function is realized by water entering from the bottom or the side through the water cavity on the side wall, but the filter and the water cavity are arranged on the side wall of the inner barrel, the volume of the inner barrel can be occupied, the space for accommodating clothes is reduced, and the filter is influenced by the water level and the water flow rotating speed, the filtering is not thorough, in addition, the filter is difficult to continue to collect the thread scraps after the thread scraps are collected fully, the filter is required to be manually taken out by a user for cleaning after the washing is finished, the labor intensity is high, and the filter is easy to damage after.
In the prior art, a filter is disposed at a center hole of the bottom of an inner tub to filter lint, and the lint collected during circulation is backwashed during drainage by means of different water flow directions during circulation and drainage of washing water, and is discharged out of a washing machine body through a drainage pipeline.
However, in the above two patents, no corresponding self-cleaning procedure is added to the structure to perform special cleaning of the filter. Because the rivers are relatively stable among the drainage process, when the backflushing filter, the comparatively stubborn thread scraps that glue in the filter bottom are difficult to be taken away by stable rivers, therefore need increase the impact force to the thread scraps of filter bottom at the in-process of drainage to realize the automatically cleaning of filter with the thread scraps clearance.
In the previous patent, we designed a self-cleaning procedure in the drainage process, controlling the inner tub to rotate to increase the friction force between the filter and the washing water, thereby increasing the thread scrap dropping probability, but if the inner tub or the pulsator is controlled to rotate at a higher water level, the thread scrap is easily made to enter the outer tub from the thread scrap filter, and then enter the inner tub, thereby making the thread scrap easily remain in the inner tub.
The present invention has been made in view of this situation.
Disclosure of Invention
The present invention is directed to overcome the disadvantages of the prior art, and to provide a control method of a washing machine, which controls rotation of an inner tub and/or a pulsator at a position where water is drained to a position close to a filter, so that the filter and washing water perform relative motion, thereby facilitating the lint to be separated from the filter, and controls rotation of the inner tub and/or the pulsator at the lower water level, thereby preventing the lint separated from the filter from entering the inner tub again.
In order to solve the technical problems, the invention adopts the technical scheme that:
a control method of a washing machine including an inner tub, a pulsator installed inside a bottom of the inner tub, and a filter installed outside the bottom of the inner tub, the washing machine having a first water level higher than and close to the filter, the control method comprising: the washing machine controls water drainage and controls the inner barrel and/or the impeller to rotate at the position of the first water level, so that thread scraps are separated from the filter.
In the above scheme, the filter and the washing water perform relative movement by controlling the inner barrel and/or the impeller to rotate at the position where the water is drained to be close to the filter, so that the thread scraps are favorably separated from the filter, and the inner barrel and/or the impeller are controlled to rotate at the lower water level, so that the thread scraps separated from the filter are prevented from entering the inner part of the inner barrel. The control method of the invention improves the cleaning effect of the filter and prevents thread scraps from remaining in the washing machine.
Preferably, the wall of the inner barrel is provided with a plurality of dewatering holes, the first water level is slightly higher/lower than the lowest dewatering hole on the inner barrel, when the water is drained to the first water level, the inner barrel is controlled by the washing machine to drive the filter to rotate, and the filter is washed, so that the thread scraps are separated from the filter;
in the scheme, the inner tub of the washing machine drives the filter to rotate at the first water level, the filter is washed in the washing water, the thread scraps are separated from the filter, and the separated thread scraps cannot enter the inner tub from the dewatering holes because the water level is low, so that the thread scraps cleaning effect is improved.
Or the first water level is higher than the impeller, and when the water is drained to the first water level, the washing machine controls the impeller to rotate so as to drive the water flow to wash the filter, so that the thread scraps are separated from the filter.
In the above scheme, when the first water level is higher than the impeller, the impeller rotates to drive the washing water to move, so that the thread scraps on the filter are washed, and the thread scraps are separated from the filter.
Preferably, after the washing machine drains water to the first water level, the washing machine controls the inner barrel and/or the impeller to rotate, start and stop alternately and/or rotate forwards and backwards alternately and/or rotate at variable speed;
preferably, the washing machine controls only the inner tub to rotate to drive the filter to be washed in the washing water, so that the lint is separated from the filter.
Preferably, before the washing machine drains water to the first water level, the inner tub is in a static state or a rotating state, and when the washing machine drains water to the first water level, the washing machine controls the inner tub to accelerate rapidly, so that the filter rotates in the water at an accelerated speed, and the bottom of the filter is washed strongly.
In the above scheme, before the washing machine drains to the first water level, the inner barrel is in a static state or a low-speed rotating state, when the washing machine drains to the first water level, the inner barrel is controlled to accelerate at a rotating speed so as to reach a set speed, so that in the accelerating process, the acceleration of the inner barrel is very high, the inner barrel drives the filter and the washing water to accelerate to wash, so that the lint at the bottom of the filter is strongly washed, and most of the lint can be separated from the filter in the process.
Preferably, after the washing machine drains water to the first water level, the washing machine controls the inner tub to accelerate to a set rotating speed V1, and controls the inner tub to keep rotating speed V1 to rotate at a constant speed, so that the filter rotates at a constant speed in water, and the bottom of the filter is flushed at a constant speed.
In the scheme, when the inner barrel reaches the set rotating speed V1, the rotating speed is controlled to be kept to rotate at a constant speed, so that the tenacious thread scraps adhered on the filter are separated from the filter.
Preferably, before draining to the first water level, the washing machine controls the inner tub to rotate at a speed lower than the speed V1, so that the filter moves in the water at a low speed to pre-flush the bottom of the filter.
In the scheme, the inner barrel is controlled to rotate at a low speed before the water is drained to the first water level, so that part of the thread scraps with poor bonding property are separated from the filter firstly and flow out along with the drained water, and the thread scraps which are bonded with high strength are pre-washed, so that the effect of high-speed and high-strength washing in the later period is improved.
Preferably, before draining water to the first water level, the washing machine controls the inner tub to rotate at a rotating speed V2 lower than the rotating speed V1, and when the draining water is detected to the first water level, the washing machine controls the inner tub to accelerate from the rotating speed V2 to the rotating speed V1, so that the filter rotates in the water in an accelerating way, and the washing of the bottom of the filter is enhanced;
preferably, the ratio of the rotating speed V1 to the rotating speed V2 is (6-4): 1;
more preferably, the rotating speed V1 is 145-155 rpm; the rotating speed V2 is 25-35 rpm.
In the above scheme, the size ratio and the selected actual value of the rotating speed V1 and the rotating speed V2 are summarized by the inventor in a large number of experiments, and when the rotating speeds V1 and V2 are set in the above ratio range or value range, the cleaning efficiency of the thread scraps can be obviously improved.
Preferably, the washing machine is provided with a second water level which is lower than the highest water level and higher than the first water level, and during the drainage process of the washing machine, when the drainage water level is higher than the second water level, the inner barrel and the impeller are controlled to be in a static state, only the washing machine is controlled to drain water, and the inner barrel is controlled to rotate at a rotating speed V2 in an accelerated mode until the washing machine drains water to the second water level.
Preferably, the second water level corresponds to a middle position of the inner tub of the washing machine.
Preferably, when the washing machine drains to the second water level, the inner tub is controlled to accelerate from a static state to the rotating speed V2 with an acceleration a2 and maintain the rotating speed until the washing machine drains to the first water level so as to pre-wash the bottom of the filter, and when the washing machine drains to the first water level, the inner tub is controlled to accelerate from the rotating speed V2 to the rotating speed V1 with an acceleration a1 so as to strongly wash the bottom of the filter;
wherein a1> a 2. Preferably, a2 is 4-6rpm/s, and a1 is 95-105 rpm/s.
In the scheme, the acceleration a1 has a high change rate of 95-105rpm/s, and the relative speed of the filter and the washing water is greatly changed, so that the effect of cleaning the thread scraps is enhanced.
The washing machine is provided with a third water level lower than the first water level, and when the water level of the washing machine reaches the third water level, the inner barrel and/or the impeller are controlled to stop rotating or enter a low-speed rotating state;
preferably, the third water level is slightly lower than the filter, and the washing machine controls the inner tub to stop rotating or enter a low-speed rotating state when the water level reaches the third water level; more preferably, the third water level is a reset water level of the washing machine, the inner tub rotates the filter at a high speed of V1 between the first water level and the third water level to wash the filter at a high speed, and after the third water level, the filter is separated from the washing water and is rotated at a lower speed of V3, and the V3 is preferably the same as the V2. After draining to a third water level (e.g., a reset water level), the washing machine controls the inner tub to maintain the rotation speed V3 for a set time period T, so that the remaining moisture on the laundry may flow out, and the last lint washing is performed on the filter. Preferably, T is 55-65 s.
In the above scheme, the third water level of the washing machine is lower than the filter, and the high-speed rotation of the inner barrel is meaningless, so that the inner barrel is controlled to stop rotating or enter a low-speed rotation state, thereby saving electric energy and time.
Or the third water level is lower than the impeller of the washing machine, and the impeller is controlled to stop rotating after the water discharged by the washing machine reaches the third water level. In the above scheme, when the water is drained to the third water level, the rotation of the impeller is meaningless, and the washing water cannot be stirred, so that the impeller is controlled to stop rotating, and the electric energy is saved.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.
The invention discloses a washing machine, which comprises an inner barrel, a wave wheel arranged in the inner barrel bottom and a filter arranged outside the inner barrel bottom, wherein the washing machine is provided with a first water level higher than and close to the filter, and the control method comprises the following steps: the washing machine controls water drainage and controls the inner barrel and/or the impeller to rotate at the position of the first water level, so that thread scraps are separated from the filter. In the above scheme, the filter and the washing water perform relative movement by controlling the inner barrel and/or the impeller to rotate at the position where the water is drained to be close to the filter, so that the thread scraps are favorably separated from the filter, and the inner barrel and/or the impeller are controlled to rotate at the lower water level, so that the thread scraps separated from the filter are prevented from entering the inner part of the inner barrel. The control method of the invention improves the cleaning effect of the filter and prevents thread scraps from remaining in the washing machine.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic view of a structure of a related art washing machine;
FIG. 2 is a partial structure view of an inner tub of a washing machine in the prior art;
FIG. 3 is a partial exploded view of a prior art washing machine
FIG. 4 is a schematic view of a prior art filter construction;
FIG. 5 is a schematic view of a prior art filter construction;
FIG. 6 is a schematic view of a prior art filter construction;
fig. 7 is a schematic view of a structure of a related art washing machine;
FIG. 8 is a partial structure view of an inner tub of a washing machine in the prior art;
fig. 9 is a schematic view of a control method of the washing machine of the present invention.
In the figure:
11. a filter; 12. an inner barrel; 13. an outer tub; 14. a flange; 15. a screw;
111. dewatering holes on the filter; 112. clamping convex; 113. curling; 114. a dewatering hole; 115. mounting holes; 116. reinforcing ribs;
121. a central drainage hole; 122. an opening;
141. and (6) clamping the hole.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention relates to a control method of a washing machine, which is realized on the basis of the washing machine.
The washing machine has various implementations.
As shown in fig. 1, in a washing machine, a filter 11 is fixed to the bottom of an inner tub 12 of the washing machine, and the outer diameter of the filter 11 is larger than the diameter of a central drainage hole 121 at the bottom of the inner tub 12; the filter 11 performs its filtering function by circulating the washing water from the bottom of the filter 11 through the filter 11 into the inner tub 12, and performs its self-cleaning function by draining the washing water from the central drainage hole 121 through the filter 11.
The filter 11 is fixed at the bottom of the inner barrel 12 of the washing machine, so as to avoid occupying the volume of the inner barrel 12; the outer diameter of the filter 11 is larger than the diameter of the central drainage hole 121 at the bottom of the inner barrel 12, so that the washing water is ensured to pass through the filter 11 in the flowing process, and the filtering is more thorough; as the pulsator of the washing machine rotates, the washing water sequentially passes through the gap between the inner tub 12 and the outer tub 13, the filter 11, and the bottom of the inner tub 12 from the inside of the inner tub 12, and then returns to the inside of the inner tub 12 to form a circulation, and lint in the washing water is collected at the filter 11, as shown by the arrow direction in fig. 1; in the drainage stage, the washing water passes through the bottom of the inner barrel 12 and the filter 11 from the inside of the inner barrel 12 in sequence, then is drained from the drainage pipe, and the washing water washes the filter 11; the pollution caused by accumulation of the thread scraps is avoided, the filter 11 does not need to be disassembled manually for cleaning, the labor intensity is reduced, and the filter 11 is prevented from being disassembled for many times and damaged.
Fig. 2 is a partially enlarged view of C in fig. 1, and as shown in fig. 2, the filter 11 has an umbrella structure with a high middle and a low edge, and a first gap a is provided between the edge of the filter 11 and the bottom of the inner barrel 12. In the washing process, as the impeller rotates, the washing water moves towards the side wall of the inner barrel 12 under the action of centrifugal force, a low-pressure area is formed at the center of the impeller, the washing water flows to the bottom of the filter 11 through a gap between the inner barrel 12 and the outer barrel 13, the arrangement of the umbrella-shaped structure is convenient for the washing water to flow towards the center of the filter 11 along the surface of the filter 11 and the washing water to flow back to the inner barrel 12; in the drainage process, the water flowing out of the drainage center hole 121 washes the filter 11, the arrangement of the umbrella-shaped structure facilitates the smooth flowing of the drained water, the washed thread scraps can flow down and be discharged along the filter 11 conveniently, and the umbrella-shaped structure is matched with the gap A to facilitate drainage.
In fig. 2, a second gap B is provided between the middle of the filter 11 and the bottom of the inner tub 12. The second gap B is larger than 2mm and cannot be too small, otherwise thread scraps are easily clamped. Along the direction of keeping away from the washing machine center, second clearance B can only be bigger and bigger, can not be sharp angle structure, otherwise also easily presss from both sides the line bits, is difficult to wash during the drainage.
As one filter pattern shown in fig. 3 and 4, the filter 11 is a frame provided with a plurality of dehydrating holes 111 (the dehydrating holes 111 are different from those of the inner tub), the plurality of dehydrating holes 111 are evenly spaced around the center of the filter 11, and a strainer seals the plurality of dehydrating holes 111 such that the washing water passes through the strainer. The filter 11 is clamped with the flange 14 at the bottom of the inner barrel 12, a plurality of clamping protrusions 112 are arranged on the surface of the filter 11 close to the flange 14, clamping holes 141 are formed in the position, opposite to the clamping protrusions 112, on the flange 14, and the clamping protrusions 112 are matched with the clamping holes 141, so that the mounting and dismounting are convenient. The frame, the clamping protrusions 112 and the filter screen are integrally formed by injection molding, so that the processing and the production are convenient. The flange 14 is installed at the bottom of the inner barrel 12 by screws 15, and the filter 11 is fastened to the bottom of the flange 14.
In addition to the filter 11 shown in fig. 1-4 being an injection molded part with a filter screen, the filter has a shape as shown in fig. 5, the filter 11 is a stainless steel plate, a plurality of dewatering holes 114 are formed in the stainless steel plate, and the plurality of dewatering holes 114 are uniformly distributed in the stainless steel plate. In the circulation process, the washing water passes through the filter 11, the water flows through the dehydrating holes 114, and the thread scraps adhere to the bottom surface of the stainless steel plate, and when the washing water washes the stainless steel plate, the surface of the stainless steel plate is smooth, thus being easy to wash. The diameter of the dewatering holes 114 is set as needed in order to filter lint.
The edge of the stainless steel plate is provided with a curled edge 113, and the curled edge 113 is formed by bending the edge of the stainless steel plate towards the direction far away from the bottom of the inner barrel 12. The edge is thickened due to the arrangement of the curled edge 113, the strength and the service life of the filter 11 are increased, and the filter is not easy to bend in the installation process. The arrangement of the turned edge 113 also prevents the original sharp edge of the stainless steel plate from being exposed, so that the stainless steel plate cannot be hurt to the carrying and installing personnel.
The flange 14 is installed at the bottom of the inner barrel 12 through a screw 15, the filter 11 is connected with the flange 14 at the bottom of the inner barrel 12 through a screw, a plurality of installation holes 115 penetrating through the stainless steel plate are formed in the stainless steel plate, and the installation holes 115 can be unthreaded holes or threaded holes.
On the basis of the above filter style, an improvement can be made, as shown in fig. 6, a reinforcing rib 116 is arranged at the edge of the stainless steel plate, the section shape of the reinforcing rib 116 is U-shaped, the reinforcing rib 116 covers the edge of the stainless steel plate, and the reinforcing rib 116 is formed by injection molding. The edge is thickened due to the arrangement of the reinforcing ribs 116, the strength and the service life of the filter 11 are increased, and the filter is not easy to bend in the installation process. The arrangement of the reinforcing ribs 116 also prevents the original sharp edge of the stainless steel plate from being exposed, so that the stainless steel plate cannot be hurt to carrying and installing personnel.
The washing machine may be further configured such that an opening 122 for passing the washing water is opened on a side surface of the bottom of the inner tub 12; as shown in fig. 7 and 8, 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, the filter 11, the bottom of the inner tub 12 from the inside of the inner tub 12, and then returns to the inside of the inner tub 12 to form a first circulation path, and lint in the washing water is collected at the filter 11, and at the same time, the washing water passes through the opening 122 at the bottom of the inner tub 12, the filter 11, the bottom of the inner tub 21 from the inside of the inner tub 12 in order, and then returns to the inside of the inner tub 12 to form a second circulation path, as shown by the arrow direction in fig; the second circulation route shortens the water circulation route, ensures the rotating speed and impact force of water flow, ensures most of water to be discharged from the opening 122 and directly returns to the inner barrel 12 through the filter 11 downwards, and further improves the filtering effect. In the draining stage, the washing water is drained from the inside of the inner tub 12 through the bottom of the inner tub 12 and the filter 11 and then through the drain pipe, and the washing water washes the filter 11.
An opening 122 is provided on the side of the inner tub bottom. The number of the openings 122 can be set according to the requirement, and the openings 122 are evenly distributed around the central line of the inner barrel at intervals, but the number is not limited. Preferably, two openings 122 are provided.
The washing machine with side opening in the inner tub is provided with the filter to form another kind of washing machine.
The washing water in the above washing machine includes the following routes:
1. in the washing or rinsing stage, as the pulsator of the washing machine rotates, the washing water sequentially passes through the gap between the inner tub 12 and the outer tub 13, the filter 11, the bottom of the inner tub 12 from the inside of the inner tub 12, and then returns to the inside of the inner tub 12 to form a first circulation path, and lint in the washing water is collected at the filter 11;
2. in the washing machine with the opening 122 in the inner tub, in the washing or rinsing stage, as the pulsator of the washing machine rotates, the washing water sequentially passes through the opening 122 at the bottom of the inner tub 12, the filter 11, the bottom of the inner tub 12 from the inside of the inner tub 12, and then returns to the inside of the inner tub 12 to form a second circulation path, and the lint in the washing water is collected at the filter 11;
3. in the draining stage, the washing water passes through the bottom of the inner tub 12 and the filter 11 in sequence from the inside of the inner tub 12, and then is drained from the drain pipe, and the washing water washes the filter 11.
The first washing machine includes the line 1 and the line 3, and the second washing machine includes the three lines, which can achieve the purpose of filtering the thread scraps and self-cleaning of the filter.
In the drainage stage of the common impeller washing machine, the inner barrel and the impeller are in a static state, and the dewatering process is carried out after the drainage is finished. During the drainage process of the washing machine, the thread scraps are washed off by the action of the reverse water flow and are drained from the drainage pipe. However, the lint may be attached to the filter more durably due to the fact that the lint is circulated for many times in the washing or rinsing stage, and the lint cannot be cleaned completely only by the regular washing water flow in the draining stage. In the route 3, the washing water is discharged out of the machine body according to a specific route in the water discharging stage, the water flow is relatively stable, and the washing of the thread scraps of the filter has certain limitation.
Example one
In one embodiment, a control method of a washing machine is provided, the washing machine includes an inner tub, a pulsator installed inside a bottom of the inner tub, and a filter installed outside the bottom of the inner tub, the washing machine has a first water level higher than and close to the filter, and the control method includes: the washing machine controls water drainage and controls the inner barrel and/or the impeller to rotate at the position of the first water level, so that thread scraps are separated from the filter.
In the above scheme, the filter and the washing water perform relative movement by controlling the inner barrel and/or the impeller to rotate at the position where the water is drained to be close to the filter, so that the thread scraps are favorably separated from the filter, and the inner barrel and/or the impeller are controlled to rotate at the lower water level, so that the thread scraps separated from the filter are prevented from entering the inner part of the inner barrel. The control method of the invention improves the cleaning effect of the filter and prevents thread scraps from remaining in the washing machine.
Preferably, the inner tub has a plurality of dewatering holes (the opening 122 may be referred to as a kind of dewatering hole) on the tub wall, the first water level is slightly higher/lower than the lowest dewatering hole on the inner tub, and when the water is drained to the first water level, the washing machine controls the inner tub to drive the filter to rotate, so as to flush the filter, so that the thread scraps are separated from the filter;
in the scheme, the inner tub of the washing machine drives the filter to rotate at the first water level, the filter is washed in the washing water, the thread scraps are separated from the filter, and the separated thread scraps cannot enter the inner tub from the dewatering holes because the water level is low, so that the thread scraps cleaning effect is improved.
Or the first water level is higher than the impeller, and when the water is drained to the first water level, the washing machine controls the impeller to rotate so as to drive the water flow to wash the filter, so that the thread scraps are separated from the filter.
In the above scheme, when the first water level is higher than the impeller, the impeller rotates to drive the washing water to move, so that the thread scraps on the filter are washed, and the thread scraps are separated from the filter.
Preferably, after the washing machine drains water to the first water level, the washing machine controls the inner barrel and/or the impeller to rotate, start and stop alternately and/or rotate forwards and backwards alternately and/or rotate at variable speed;
preferably, the washing machine controls only the inner tub to rotate to drive the filter to be washed in the washing water, so that the lint is separated from the filter.
Example two
In the second embodiment, on the basis of the first embodiment, in order to enhance the cleaning effect of the filter, further design is performed: before the washing machine drains water to the first water level, the inner barrel is in a static state or a rotating state, and when the washing machine drains water to the first water level, the washing machine controls the inner barrel to accelerate rapidly, so that the filter rotates in water at an accelerated speed, and the bottom of the filter is washed strongly.
In the above scheme, before the washing machine drains to the first water level, the inner barrel is in a static state or a low-speed rotating state, when the washing machine drains to the first water level, the inner barrel is controlled to accelerate at a rotating speed so as to reach a set speed, so that in the accelerating process, the acceleration of the inner barrel is very high, the inner barrel drives the filter and the washing water to accelerate to wash, so that the lint at the bottom of the filter is strongly washed, and most of the lint can be separated from the filter in the process.
Preferably, after the washing machine drains water to the first water level, the washing machine controls the inner tub to accelerate to a set rotating speed V1, and controls the inner tub to keep rotating speed V1 to rotate at a constant speed, so that the filter rotates at a constant speed in water, and the bottom of the filter is flushed at a constant speed.
In the scheme, when the inner barrel reaches the set rotating speed V1, the rotating speed is controlled to be kept to rotate at a constant speed, so that the tenacious thread scraps adhered on the filter are separated from the filter.
Preferably, before draining to the first water level, the washing machine controls the inner tub to rotate at a speed lower than the speed V1, so that the filter moves in the water at a low speed to pre-flush the bottom of the filter.
In the scheme, the inner barrel is controlled to rotate at a low speed before the water is drained to the first water level, so that part of the thread scraps with poor bonding property are separated from the filter firstly and flow out along with the drained water, and the thread scraps which are bonded with high strength are pre-washed, so that the effect of high-speed and high-strength washing in the later period is improved.
Preferably, before draining water to the first water level, the washing machine controls the inner tub to rotate at a rotating speed V2 lower than the rotating speed V1, and when the draining water is detected to the first water level, the washing machine controls the inner tub to accelerate from the rotating speed V2 to the rotating speed V1, so that the filter rotates in the water in an accelerating way, and the washing of the bottom of the filter is enhanced;
preferably, the ratio of the rotating speed V1 to the rotating speed V2 is (6-4): 1;
more preferably, the rotating speed V1 is 145-155 rpm; the rotating speed V2 is 25-35 rpm.
In the above scheme, the size ratio and the selected actual value of the rotating speed V1 and the rotating speed V2 are summarized by the inventor in a large number of experiments, and when the rotating speeds V1 and V2 are set in the above ratio range or value range, the cleaning efficiency of the thread scraps can be obviously improved.
Preferably, the washing machine is provided with a second water level which is lower than the highest water level and higher than the first water level, and during the drainage process of the washing machine, when the drainage water level is higher than the second water level, the inner barrel and the impeller are controlled to be in a static state, only the washing machine is controlled to drain water, and the inner barrel is controlled to rotate at a rotating speed V2 in an accelerated mode until the washing machine drains water to the second water level.
Preferably, the second water level corresponds to a middle position of the inner tub of the washing machine.
Preferably, when the washing machine drains to the second water level, the inner tub is controlled to accelerate from a static state to the rotating speed V2 with an acceleration a2 and maintain the rotating speed until the washing machine drains to the first water level so as to pre-wash the bottom of the filter, and when the washing machine drains to the first water level, the inner tub is controlled to accelerate from the rotating speed V2 to the rotating speed V1 with an acceleration a1 so as to strongly wash the bottom of the filter;
wherein a1> a 2. Preferably, the a2 is 4-6rpm/s, and the a1 is 95-105 rpm/s.
In the scheme, the acceleration a1 has a high change rate of 95-105rpm/s, and the relative speed of the filter and the washing water is greatly changed, so that the effect of cleaning the thread scraps is enhanced.
EXAMPLE III
In the third embodiment, the third water level is added on the basis of the first or second embodiment, so that the effects of saving energy and time are achieved, and the third embodiment is as follows:
the washing machine is provided with a third water level lower than the first water level, and when the water level of the washing machine reaches the third water level, the inner barrel and/or the impeller are controlled to stop rotating or enter a low-speed rotating state;
preferably, the third water level is slightly lower than the filter, and the washing machine controls the inner tub to stop rotating or enter a low-speed rotating state when the water level reaches the third water level; more preferably, the third water level is a reset water level of the washing machine, the inner tub rotates the filter at a high speed of V1 between the first water level and the third water level to wash the filter at a high speed, and after the third water level, the filter is separated from the washing water and is rotated at a lower speed of V3, and the V3 is preferably the same as the V2. After draining to a third water level (e.g., a reset water level), the washing machine controls the inner tub to maintain the rotation speed V3 for a set time period T, so that the remaining moisture on the laundry may flow out, and the last lint washing is performed on the filter. Preferably, T is 55-65 s.
In the above scheme, the third water level of the washing machine is lower than the filter, and the high-speed rotation of the inner barrel is meaningless, so that the inner barrel is controlled to stop rotating or enter a low-speed rotation state, thereby saving electric energy and time.
Or the third water level is lower than the impeller of the washing machine, and the impeller is controlled to stop rotating after the water discharged by the washing machine reaches the third water level. In the above scheme, when the water is drained to the third water level, the rotation of the impeller is meaningless, and the washing water cannot be stirred, so that the impeller is controlled to stop rotating, and the electric energy is saved.
Referring to fig. 9, the following provides preferred washing machine control steps of the present invention:
the washing machine comprises a second water level, a first water level and a third water level from top to bottom; the control is as follows:
s1, controlling water discharge by the washing machine, judging whether the water level is lower than a second water level, if so, entering a step S2, and if not, entering a step S1;
s2, controlling the inner tub to accelerate to a rotating speed V2 by the washing machine;
s3, the inner barrel keeps rotating at the rotating speed V2, the washing machine judges whether the water level is lower than the first water level, if so, the step S4 is carried out, otherwise, the step S3 is carried out;
s4, controlling the inner tub of the washing machine to accelerate from the rotating speed V2 to the rotating speed V1;
s5, the inner barrel keeps rotating at the rotating speed V1, the washing machine judges whether the water level is lower than the third water level, if so, the step S6 is carried out, otherwise, the step S5 is carried out;
s6, the washing machine controls the inner tub to decelerate to V3, and keeps the set time length T;
and S7, the washing machine controls the inner barrel to stop rotating, and the control is finished.
Preferably, the washing machine has a self-cleaning program, and after the self-cleaning program is selected, the washing machine controls the inflow water to be higher than a first water level and then controls the drainage water to perform the cleaning process of the cleaning lint described in the above embodiment;
or, in order to achieve the effect of saving energy and time, the washing machine may also perform a self-cleaning procedure during water drainage during the washing process, so as to save time, and most preferably, the self-cleaning procedure is performed during the last water drainage process of a single operation of the washing machine, where the self-cleaning procedure is defined as a process in which the washing machine controls the inner tub and/or the pulsator to rotate so as to separate lint from the filter in the above embodiment.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A control method of a washing machine, the washing machine including an inner tub, a pulsator installed inside a bottom of the inner tub, and a filter installed outside the bottom of the inner tub, the washing machine having a first water level higher than and close to the filter, the control method comprising: the washing machine controls water drainage and controls the inner barrel and/or the impeller to rotate at the position of the first water level, so that thread scraps are separated from the filter.
2. The control method of a washing machine as claimed in claim 1, wherein a plurality of dewatering holes are formed on a tub wall of the inner tub, the first water level is slightly higher/lower than the lowest dewatering hole on the inner tub, and when the water is drained to the first water level, the washing machine controls the inner tub to drive the filter to rotate, and the filter is washed, so that the lint is separated from the filter;
or the first water level is higher than the impeller, and when the water is drained to the first water level, the washing machine controls the impeller to rotate so as to drive the water flow to wash the filter, so that the thread scraps are separated from the filter.
3. The control method of the washing machine as claimed in claim 1 or 2, wherein the washing machine controls the inner tub and/or the pulsator to be alternately turned on and off and/or to be alternately turned in forward and reverse directions and/or to be rotated at a variable speed after draining water to the first water level;
preferably, the washing machine controls only the inner tub to rotate to drive the filter to be washed in the washing water, so that the lint is separated from the filter.
4. A control method of a washing machine as claimed in any one of claims 1 to 3, wherein the inner tub is in a stationary state or a rotating state before the washing machine drains to the first water level, and the washing machine controls the inner tub to be rapidly accelerated when the washing machine drains to the first water level, so that the filter is rotated in the water at an accelerated speed to forcibly wash the bottom of the filter.
5. The control method of a washing machine as claimed in claim 4, wherein after the washing machine drains the water to the first water level, the washing machine controls the inner tub to accelerate to a set rotation speed V1, and controls the inner tub to maintain a rotation speed V1 to rotate at a constant speed, so that the filter rotates at a constant speed in the water, and the bottom of the filter is washed at a constant speed.
6. A control method of a washing machine as claimed in claim 4 or 5, wherein the washing machine controls the inner tub to rotate at a rotation speed lower than the rotation speed V1 before draining water to the first water level, so that the filter moves in the water at a low speed to pre-wash the bottom of the filter.
7. A control method of a washing machine as claimed in any one of claims 4 to 6, wherein before the draining to said first water level, the washing machine controls the inner tub to rotate at a rotation speed V2 lower than the rotation speed V1, and when the draining to said first water level is detected, the washing machine controls the inner tub to accelerate from the rotation speed V2 to the rotation speed V1, so that the filter rotates in the water at an accelerated speed during the acceleration to enhance the washing of the bottom of the filter;
preferably, the ratio of the rotating speed V1 to the rotating speed V2 is (6-4): 1;
more preferably, the rotating speed V1 is 145-155 rpm; the rotating speed V2 is 25-35 rpm.
8. A control method of a washing machine as claimed in any one of claims 1 to 7, wherein the washing machine is provided with a second water level lower than the highest water level and higher than the first water level, and the inner tub and the pulsator are controlled to be in a stationary state at a drain water level higher than the second water level during a draining process of the washing machine, and only the washing machine is controlled to drain water until the inner tub is controlled to be rotated at an accelerated speed V2 when the washing machine drains water to the second water level.
9. The control method of a washing machine as claimed in claim 8, wherein the inner tub is controlled to be accelerated from a stationary state to said rotation speed V2 at an acceleration a2 and to be maintained until the water is drained to said first water level to pre-wash the bottom of the filter when the washing machine drains to said second water level, and to be accelerated from the rotation speed V2 to the rotation speed a1 to the rotation speed V1 to strongly wash the bottom of the filter when the washing machine drains to said first water level; wherein a1> a 2.
10. The control method of a washing machine as claimed in any one of claims 1 to 9, wherein the washing machine is provided with a third water level lower than the first water level, and the washing machine controls the inner tub and/or the pulsator to stop rotating or to enter a low-speed rotation state when the water level reaches the third water level;
preferably, the third water level is slightly lower than the filter, and the washing machine controls the inner tub to stop rotating or enter a low-speed rotating state when the water level reaches the third water level; more preferably, the third water level is a reset water level of the washing machine;
or the third water level is lower than the impeller of the washing machine, and the impeller is controlled to stop rotating after the water discharged by the washing machine reaches the third water level.
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| CN103938416A (en) * | 2013-01-21 | 2014-07-23 | 海尔集团公司 | Washing machine with self-cleaning line chip filtering device and control method of washing machine |
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