CN117758475A

CN117758475A - Control method of clothes treatment equipment

Info

Publication number: CN117758475A
Application number: CN202211137567.4A
Authority: CN
Inventors: 吕艳芬; 许升; 迟荣红
Original assignee: Qingdao Haier Washing Electric Appliance Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Washing Electric Appliance Co Ltd; Haier Smart Home Co Ltd
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2024-03-26

Abstract

The invention belongs to the technical field of clothes treatment equipment, and discloses a control method of clothes treatment equipment, which comprises the following steps: an inner cylinder for containing water; the water collecting device is used for collecting water overflowed from the inner cylinder; the circulating device is used for conveying the water collected by the water collecting device back to the inner cylinder; the control method comprises the following steps: detecting the water level in the water collecting device to be greater than or equal to a first preset water level, and controlling the circulating device to return water from the water collecting device to the inner cylinder. According to the clothes treatment equipment, when the water level in the water collecting device is higher, the collected water can be timely conveyed back to the inner cylinder, so that the water overflowed into the water collecting device from the inner cylinder can flow back to the inner cylinder without waste, and the inner cylinder is ensured to have enough water quantity for washing clothes.

Description

Control method of clothes treatment equipment

Technical Field

The invention belongs to the technical field of clothes treatment equipment, and particularly relates to a control method of clothes treatment equipment.

Background

A laundry treating apparatus for washing laundry, such as a conventional washing machine, generally includes an inner tub and an outer tub, and a plurality of dehydrating holes are provided on a wall of the inner tub. However, in the washing process, the washing water between the inner cylinder and the outer cylinder is not utilized, so that the waste of the washing water is caused. Meanwhile, part of dirt generated in the washing process can remain between the inner cylinder and the outer cylinder, so that the dirt is difficult to clean, and long-term accumulation can pollute washing water and affect the washing effect.

In order to solve the problems, the clothes treatment equipment with the inner cylinder not provided with the dewatering holes is provided, so that washing water can be contained in the inner cylinder through the inner cylinder in the washing process, the condition of water storage between the inner cylinder and the outer cylinder in the washing process can be avoided, the consumption of the washing water is saved, and meanwhile, the problems of accumulated dirt between the inner cylinder and the outer cylinder and secondary pollution to clothes are solved to a great extent.

However, with the laundry treatment apparatus of the above-described structure, if an additional cover is not installed at the opening of the inner tub, wash water overflows into the outer tub from the opening thereof as the inner tub rotates during the washing process, so that the amount of wash water in the inner tub gradually decreases as the washing process proceeds. If the water quantity in the inner cylinder is reduced to a certain degree, the clothes cannot be fully contacted with the water, so that the clothes cannot be effectively washed, and the washing effect is greatly reduced.

In view of this, the present invention has been made.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects of the prior art and providing a control method of clothes treatment equipment which can timely convey overflow water of an inner cylinder into the inner cylinder and ensure the washing water quantity in the inner cylinder.

In order to solve the technical problems, the invention adopts the basic conception of the technical scheme that:

a control method of a laundry treatment apparatus, the laundry treatment apparatus comprising:

an inner cylinder for containing water;

the water collecting device is used for collecting water overflowed from the inner cylinder;

the circulating device is used for conveying the water collected by the water collecting device back to the inner cylinder;

the control method comprises the following steps: detecting the water level in the water collecting device to be greater than or equal to a first preset water level, and controlling the circulating device to return water from the water collecting device to the inner cylinder.

Further, the method further comprises the following steps: detecting that the water level in the water collecting device is smaller than a second preset water level, and controlling the circulating device to stop backwater to the inner cylinder;

wherein the second preset water level is smaller than the first preset water level.

Further, the circulating device comprises a circulating pipe and a circulating pump arranged on the circulating pipe, one end of the circulating pipe is communicated with the water collecting device, and the other end of the circulating pipe is communicated with the inner cylinder;

the control method comprises the following steps: when the water level in the water collecting device is detected to be more than or equal to a first preset water level, the circulating pump is controlled to start backwater of the inner cylinder; and/or when the water level in the water collecting device is detected to be smaller than the second preset water level, the circulating pump is controlled to be closed to stop backwater to the inner cylinder.

Further, the clothes treatment equipment detects the water level in the water collecting device in the running process of the rinsing stage of the washing program or in the running process of the high water level washing program, and is used for controlling whether the circulating device returns water to the inner drum;

the high water level washing program is one in which the water level in the inner cylinder is higher than the threshold.

Further, the water collecting device is an outer cylinder coaxially arranged with the inner cylinder, and the clothes treating apparatus further comprises a water draining device for controlling water collected in the outer cylinder to be discharged outwards;

before the final rinsing stage starts to drain, controlling the drainage device to keep a closed state; the inner cylinder is controlled to rotate, and the outer wall of the inner cylinder and/or the inner wall of the outer cylinder are/is cleaned by water collected in the outer cylinder.

Further, controlling the rotation of the inner barrel further comprises: detecting that the water level in the outer cylinder is greater than or equal to a third preset water level, and controlling the inner cylinder to start rotating to clean the outer wall of the inner cylinder and/or the inner wall of the outer cylinder;

the third set water level is smaller than the overflow water level of the inner cylinder and higher than the lowest position of the inner cylinder.

Further, if the water level in the outer cylinder is smaller than a third preset water level, controlling the inner cylinder to drain water to the outer cylinder;

and when the set condition is reached, controlling the inner cylinder to stop draining and start rotating, and cleaning the outer wall of the inner cylinder and/or the inner wall of the outer cylinder.

Further, the setting condition is that the duration time of the inner cylinder to the outer cylinder for draining reaches a first setting time length;

or, the setting condition is that the water level in the outer cylinder is detected to be more than or equal to a third setting water level.

Further, the inner cylinder continuously rotates to clean for a second set time period, and the water draining device is controlled to open to drain water outwards.

Further, the method further comprises the following steps: before dehydration is finished, inflow water is sprayed to the outer wall of the inner cylinder to wash the outer wall of the inner cylinder and/or the inner wall of the outer cylinder.

By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects.

According to the invention, the clothes treatment equipment can detect the water level in the water collecting device, and when the water level is higher, the water in the water collecting device is conveyed back to the inner cylinder through the circulating device, so that the water overflowed into the water collecting device from the inner cylinder can flow back to the inner cylinder, the situation that the overflowed water cannot be used for washing clothes and is wasted is avoided, and the condition that the inner cylinder has enough water quantity for washing clothes is also ensured, and the washing effect is avoided.

In the invention, the clothes treatment equipment can automatically control to detect the water level of the water collecting device in the rinsing stage with higher initial water level in the inner cylinder or when a high water level washing program is operated, so as to control the circulating device to return water to the inner cylinder, and the water in the inner cylinder needs to be returned to the inner cylinder to ensure that the water in the inner cylinder is enough for washing because the initial water amount in the inner cylinder is larger and is easier to overflow from the cylinder opening.

In the invention, the clothes treatment equipment controls the inner cylinder to rotate before the water discharge in the final rinsing stage, so that the outer wall of the inner cylinder and the inner wall of the outer cylinder are cleaned by utilizing the water collected in the outer cylinder, dirt possibly remained in the washing process can be cleaned and removed in time, and dirt can be further removed between the inner cylinder and the outer cylinder by spraying the water inlet before the dehydration is finished, so that the inner cylinder and the outer cylinder are kept clean, and the dirt between the inner cylinder and the outer cylinder is prevented from being carried into the inner cylinder when the water is returned to the inner cylinder in the next washing process, thereby causing pollution to clothes.

The following describes the 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 and 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. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:

FIG. 1 is a schematic view of a clothing processing apparatus according to an embodiment of the present invention;

FIG. 2 is a flowchart of a control method of a clothes treating apparatus according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a garment treatment apparatus according to a second embodiment of the present invention.

In the figure: 100. a housing; 110. a gate; 120. a window pad; 200. an inner cylinder; 210. lifting ribs; 300. an outer cylinder; 400. a drain circulation pump; 401. a circulation pipe; 402. a drain pipe; 403. a pump hose; 410. a circulation pump; 420. a draining pump; 501. a water inlet valve; 502. a water inlet pipe; 600. a motor; 610. a transmission shaft; 611. a water inlet hole; 620. dynamic sealing; 710. a blower; 720. heating pipes; 730. a top air duct; 740. and a machine door air duct.

It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific 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 explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Example 1

The present embodiment provides a control method of a laundry treatment apparatus, which may be an apparatus having a laundry function such as a washing machine, a washing and drying integrated machine, or the like.

As shown in fig. 1, the laundry treating apparatus according to the present embodiment includes an inner tub 200, and no dehydrating holes are provided on the inner tub 200, so that laundry is washed by independently holding water through the inner tub 200 during a washing process. The laundry treating apparatus further includes a water collecting device for collecting water overflowed from the inner tub 200.

Specifically, the inner tub 200 has a tub opening for a user to perform a laundry taking and putting operation. The opening of the inner tub 200 is opened during the washing process, and during the washing process, the inner tub 200 rotates to drive the water flow and the laundry inside to turn over, and especially in the case that the initial water level in the inner tub 200 is relatively close to the lowest position of the opening, the water in the inner tub 200 easily overflows from the opening. The water collecting device is at least partially arranged below the nozzle of the inner cylinder 200, and can receive and store the overflowed water of the inner cylinder 200.

In this embodiment, the water collecting device is an outer cylinder 300 coaxially disposed with the inner cylinder 200, and the inner cylinder 200 is rotatably disposed inside the outer cylinder 300. It will be appreciated that the water collection device may be a water collection tank in communication with the nozzle of the inner cylinder 200.

Further, the outer tub 300 and the inner tub 200 are provided together inside the casing 100 of the laundry treating apparatus, and the casing 100 has a laundry putting-in port where the openable and closable door 110 is installed. The tub mouth of the tub 300 is installed with a window pad 120, and is connected to the outer circumference of the laundry putting-in port through the window pad 120, thereby preventing water collected in the tub 300 from falling into the casing 100.

The laundry treating apparatus of the present embodiment further includes a circulation device in communication with the outer tub 300 and the inner tub 200, respectively, for transporting water collected in the outer tub 300 into the inner tub 200. The outer tub 300 is provided with a water level detecting device (not shown), and the laundry treating apparatus controls the circulation device to return water from the outer tub 300 to the inner tub 200 based on the water level information detected by the water level detecting device.

Specifically, the control method of the clothing processing apparatus in this embodiment includes: the water level in the outer cylinder 300 is detected to be greater than or equal to a first preset water level, and the circulating device is controlled to return water from the outer cylinder 300 to the inner cylinder 200.

In the above scheme, the first preset water level is lower than the lowest position of the nozzle of the inner cylinder 200, and may be set to be slightly lower than the lowest position of the nozzle of the inner cylinder 200. When the water level in the outer cylinder 300 reaches or exceeds the first preset water level, it is indicated that a certain amount of inner cylinder 200 overflows in the outer cylinder 300, and at the moment, the circulating device is started to return water to the inner cylinder 200, so that the overflowed water of the inner cylinder 200 is timely conveyed back to the inner cylinder 200, waste caused by that the overflowed water of the inner cylinder 200 cannot be used for washing clothes is avoided, and meanwhile, the inner cylinder 200 is ensured to have enough water quantity for washing clothes, and the washing effect is ensured not to be affected.

In a further aspect of this embodiment, in the process of returning water by the circulation device, if the water level in the outer cylinder 300 is detected to be less than the second preset water level, the circulation device is controlled to stop returning water to the inner cylinder 200.

In the above scheme, the second preset water level is smaller than the first preset water level. The circulation device continues to operate to return water, gradually lowering the water level in the outer cylinder 300, and when it falls below the second preset water level, indicating that most of the overflow water has been delivered back into the inner cylinder 200. At this time, the circulation device can be controlled to stop working, so that the phenomenon that the circulation device continues to work to completely pump out water in the outer cylinder 300 and then suck air is avoided, and noise is possibly generated or the subsequent working effect is possibly influenced.

In this embodiment, the circulating device includes a circulating pipe and a circulating pump 410 disposed on the circulating pipe. The circulating pipeline specifically comprises a pump hose 403 and a circulating pipe 401, the bottom of the outer cylinder 300 is connected with a circulating pump 410 through the pump hose 403, and the circulating pump 410 is communicated with the inner cylinder 200 through the circulating pipe 401.

Further, the water outlet end of the circulation pipe 401 communicates with the water inlet passage of the laundry treating apparatus, and thus the overflow water collected in the outer tub 300 may be transferred back into the inner tub 200 when the circulation pump 410 is turned on.

In detail, the bottom of the inner cylinder 200 is connected to the motor 600 through a transmission shaft 610, and thus the inner cylinder 200 is driven to rotate by the motor 600. The transmission shaft 610 has a hollow structure, and a water inlet hole 611 communicating with the inside of the inner cylinder 200 is formed therein. One end of the water inlet pipe 502 of the clothes treating apparatus is connected with the water inlet valve 501, the other end is connected with one end (i.e. the left end in fig. 1) of the transmission shaft 610 far away from the bottom of the inner cylinder 200 through the dynamic seal 620, so that the transmission shaft 610 is in sealing connection with the water inlet pipe 502 in a relatively rotatable manner, and the inner water inlet hole 611 is communicated with the water inlet pipe 502, so that water can be introduced into the inner cylinder 200 through the water inlet hole 611 of the transmission shaft 610.

In this embodiment, the water outlet end of the circulation pipe 401 is connected to the water inlet pipe 502, and is specifically connected to a position close to the water outlet end of the water inlet pipe 502, so that water can be returned to the inner cylinder 200 through the water inlet hole 611 of the transmission shaft 610, that is, the returned water flow flows into the inner cylinder 200 from the center of the bottom of the inner cylinder 200. The backwater mode can enable backwater water flow to directly shower on the washed clothes, and can play an auxiliary washing effect while backwatering.

The control method of the clothes treatment apparatus in this embodiment is shown in fig. 2, and specifically includes:

detecting a water level in the tub 300 during washing;

when the water level in the outer cylinder 300 is detected to be greater than or equal to a first preset water level, the circulating pump 410 is controlled to start backwater to the inner cylinder 200;

when the water level in the outer tub 300 is detected to be less than the second preset water level, the circulation pump 410 is controlled to be turned off to stop water return to the inner tub 200.

In the above-described scheme, the laundry treating apparatus controls the opening and closing of the circulation pump 410 based on the detected height of the water level in the tub 300. When the water level in the outer tub 300 is high, the circulation pump 410 is controlled to be turned on, thereby timely controlling the overflow water to flow back into the inner tub 200, ensuring the sufficient water amount in the inner tub 200, and thus ensuring the laundry washing effect. The water level in the outer barrel 300 is continuously detected in the water return process, the circulating pump 410 is controlled to be closed when the water level is low, and the phenomenon that the circulating pump 410 sucks air to generate larger noise when overflow water in the outer barrel 300 is pumped out to influence the use experience of a user is avoided.

In a further aspect of this embodiment, the laundry treatment apparatus controls the water level detecting device to detect the water level in the outer tub 300 during the rinsing stage of the laundry process, and controls whether the circulation device returns water to the inner tub 200 according to the detected water level, that is, controls whether the circulation pump 410 is turned on.

Further, the water level detecting means is not operated during the washing stage of the washing course, and the circulation pump 410 is always maintained in a closed state.

In general, the rinsing water level of the laundry treating apparatus is higher than the washing water level, that is, the initial water level of the drum 200 in the rinsing stage is higher than that in the washing stage, thereby ensuring that the rinsing stage can more thoroughly wash out the residual detergent in the laundry. Therefore, after the rinsing stage finishes water inflow, the water level in the inner barrel 200 is closer to the lowest position of the barrel mouth of the inner barrel 200 than the washing stage, and water overflow in the inner barrel 200 is easier to occur in the subsequent operation process.

In this embodiment, the clothes treating apparatus automatically starts the water level detecting device in the rinsing stage to detect the water level in the outer drum 300, further determine the amount of water overflowed from the inner drum 200, and control the circulating pump 410 to return water to the inner drum 200 when the water level in the outer drum 300 is higher, i.e. the amount of water overflowed from the inner drum 200 is larger. Thus, the rinsing effect of the rinsing stage is ensured, and the condition that the detergent remains on the clothes due to insufficient rinsing water is avoided. In the washing stage, the water level in the inner cylinder 200 is relatively low, so that the overflow probability and the overflow water amount from the cylinder opening are low, and the washing effect is not obviously affected. The water level detection device does not work in the washing stage, so that the working time of the water level detection device in the running process of a washing program is reduced, and the service life of the water level detection device is prolonged.

In another aspect of this embodiment, the laundry treating apparatus controls the water level detecting device to detect the water level in the outer tub 300 during the operation of the high water level washing program, and controls whether the circulation device returns water to the inner tub 200 according to the detected water level, that is, controls whether the circulation pump 410 is turned on. The high water level washing process is a washing process in which the set water level of the inlet water in the drum 200 is higher than a set threshold value.

In the washing process, the set water level of the water entering the inner tub 200 is the initial water level in the inner tub 200 after the water is completely fed. The higher the initial water level is, the closer the water level in the inner cylinder 200 is to the lowest position of the cylinder mouth of the inner cylinder 200, and the more likely the water in the inner cylinder 200 overflows in the subsequent operation process.

The laundry treatment apparatus presets a set threshold for the set water level, and if the set water level of the laundry program set or selected by the user is higher than the set threshold, it is determined that the laundry program to be operated is a high water level laundry program, and then when the inner tub 200 starts to rotate to perform laundry, the water level detection device is automatically turned on to detect the water level in the outer tub 300. Meanwhile, the laundry treating apparatus determines the amount of overflowed water of the inner tub 200 according to the detected water level, and controls the circulation pump 410 to return water to the inner tub 200 when the water level in the outer tub 300 is high, i.e., the amount of overflowed water of the inner tub 200 is large.

In this way, for the washing program with a large required washing water amount, the clothes treatment device can timely return water into the inner drum 200 when the washing water overflows in the inner drum 200, so that the problem that the clothes are not sufficiently washed due to a large loss of the washing water in the inner drum 200 is avoided.

In a further aspect of the present embodiment, the laundry treating apparatus further includes a drain device for controlling the water collected in the tub 300 to be discharged outwards. The drainage device specifically comprises a drainage pipeline and a drainage pump 420 arranged on the drainage pipeline, wherein the drainage pump 420 can drain water collected in the outer barrel 300 when being started, and the water entering the outer barrel 300 can be stored in the outer barrel 300 when the drainage pump 420 is closed.

Further, the circulation pump 410 and the drain pump 420 in the present embodiment are integrally provided as a drain circulation pump 400, the water inlet of which communicates with the tub 300 through a pump hose 403. The drain circulation pump 400 has a first water outlet connected to the circulation pipe 401 for returning water to the inner cylinder 200 through the circulation pipe 401, and a second water outlet connected to the drain pipe 402 for draining water outwardly through the drain pipe 402.

In the present embodiment, in the washing stage and the rinsing stage of the laundry treating apparatus, the initial state of the drain circulation pump 400 is the closed state, and water overflowed from the opening of the inner tub 200 enters and is temporarily stored in the outer tub 300. When the water level detection device detects that the water level in the outer tub 300 reaches the first preset water level, the drain circulation pump 400 is turned on, and pumps water from the water inlet thereof and discharges the water from the first water outlet, thereby returning water from the outer tub 300 to the inner tub 200. When the water level in the outer tub 300 drops to a second preset water level, the drain circulation pump 400 is restored to the off state.

When the washing stage or the rinsing stage is about to drain, the inner tub 200 is controlled to drain to the outer tub 300. In the process of draining the inner tub 200 to the outer tub 300, or after the inner tub 200 finishes draining, the drain circulation pump 400 is controlled to be turned on, and water is pumped from the water inlet thereof and drained from the second water outlet, thereby draining the water in the outer tub 300 outwards.

Further, a drain port is provided on the wall of the inner cylinder 200, where a centrifugal drain assembly is installed. The initial state of the centrifugal drainage assembly is a state of keeping the drain port blocked, so that the inner cylinder 200 can independently hold water. When the inner cylinder 200 exceeds a rotational speed threshold V _m When the rotation speed of the inner cylinder 200 rotates, the centrifugal drainage assembly can open the water outlet to drain outwards under the action of centrifugal force generated by the rotation of the inner cylinder.

Preferably, the lifting rib 210 is installed on the wall of the inner cylinder 200, the lifting rib 210 is internally provided with a containing cavity, and the surface of the lifting rib 210 is provided with a water permeable hole for communicating the containing cavity with the inner cylinder 200. The water outlet is arranged in the area where the lifting ribs 210 are arranged on the wall of the inner cylinder 200, and the centrifugal water discharging assembly is arranged inside the lifting ribs 210 to control the opening and closing states of the water outlet.

In this embodiment, the clothes treatment device is a washing and drying integrated machine, and has a function of drying clothes after washing is completed. In order to achieve the above drying function, the laundry treatment apparatus further includes a circulation duct having both ends respectively connected to the inner tub 200, in which a blower 710 and a heating pipe 720 are disposed. The fan 710 is started to drive air to circulate in the inner cylinder 200 and the circulating air duct, the heating pipe 720 heats the circulating air, so that high-temperature air is introduced into the inner cylinder 200 to heat damp clothes, part of moisture in the clothes is directly evaporated in a high-temperature environment, part of moisture is discharged out of the inner cylinder 200 along with the cooled air, and drying of the clothes is realized.

Specifically, the circulation duct includes a return air duct receiving air discharged from the inner cylinder 200, a top duct 730 connected to the return air duct and disposed above the outer cylinder 300, and a door duct 740 connected to the top duct 730 and disposed inside the door 110 to supply air into the inner cylinder 200. The blower 710 is disposed at an air inlet end of the top air duct 730, and the heating duct 720 is disposed at a central region of the top air duct 730.

Because the inner cylinder 200 and the outer cylinder 300 are communicated at the cylinder opening, in the process of drying clothes, high-temperature air is blown out by the air duct 740, most of the air can enter the inner cylinder 200, but part of the air can enter the space between the inner cylinder 200 and the outer cylinder 300 through a gap between the cylinder opening of the inner cylinder 200 and the inner wall of the outer cylinder 300, and the space between the inner cylinder 200 and the outer cylinder 300 can be dried. In this way, after the operation of the laundry treatment apparatus is finished, the inner tub 200 and the outer tub 300 can be kept in a dry state, so that the problem of bacteria breeding in a humid environment is avoided, and further, pollution to laundry caused by backwater from the outer tub 300 to the inner tub 200 is avoided when the laundry treatment apparatus is operated again.

In this embodiment, the laundry treatment apparatus detects the water level in the outer tub 300 during operation, and when the water level in the outer tub 300 is higher due to overflow of the inner tub 200, water returning to the inner tub 200 can be controlled in time, so that the overflowed water returns to the inner tub 200 to be reused for washing laundry, thereby avoiding waste of the overflowed water. Meanwhile, water is timely returned to the inner barrel 200, so that the water quantity in the inner barrel 200 can be ensured to be sufficient, and the influence of insufficient water quantity on the washing effect is avoided.

Example two

As shown in fig. 3, this embodiment differs from the first embodiment in that: the water outlet end of the circulating pipe 401 is connected to the window pad 120 arranged at the nozzle of the outer cylinder 300, and water is returned from the window pad 120 to the inner cylinder 200.

Specifically, a shower head assembly (not shown) is installed at the top region of the window pad 120, and the water outlet end of the circulation pipe 401 is connected to the shower head assembly, through which water is returned into the inner tub 200. Preferably, the spray head assembly is provided with a spray nozzle capable of forming a certain spray area, and the backwater water flow is sprayed out of the spray nozzle of the spray head assembly, sprayed into the inner cylinder 200 through the cylinder opening of the inner cylinder 200 and covers a certain area. The backwater water flows into the inner tub 200 to spray and cover a certain area, so that the effect of assisting in washing clothes can be achieved.

In the above-described scheme, the drain circulation pump 400 pumps out the water collected in the outer tub 300, conveys it up the circulation pipe 401 to above the window pad 120, and forms spray water through the spray head assembly to return to the inner tub 200. Compared with the mode of backwater from the center of the bottom of the inner cylinder 200 in the first embodiment, the backwater flow falls into the inner cylinder 200 to form a larger coverage area, and particularly, in the rinsing stage, the effect of improving the washing effect by flushing the clothes through the backwater flow is more obvious.

Example III

As shown in fig. 1 and 3, this embodiment is further defined as the first or second embodiment, in which the drain device is controlled to be kept closed before the final rinsing stage of the laundry treating apparatus starts to drain water, water overflowed from the inner tub 200 is stored in the outer tub 300, and then the inner tub 200 is controlled to rotate, and the outer wall of the inner tub 200 and the inner wall of the outer tub 300 are washed by the water collected in the outer tub 300.

Specifically, when the final rinsing stage of the laundry treating apparatus is completed, and the drain is to be started, the drain circulation pump 400 is maintained in a closed state, and the inner tub 200 is controlled to be continuously rotated at the rotation speed V. The rotating speed V is smaller than the rotating speed threshold V _m Therefore, the centrifugal drain assembly on the inner cylinder 200 maintains the drain blocking state in the above process, and the inner cylinder 200 does not drain to the outer cylinder 300.

Since the water overflowed from the inner tub 200 in the final-rinse stage is stored in the outer tub 300, the bottom region of the inner tub 200 may be submerged below the water surface in the outer tub 300, and thus as the inner tub 200 rotates, the water collected in the outer tub 300 is agitated by the inner tub 200, and thus the outer wall of the inner tub 200 and the inner wall of the outer tub 300 may be washed.

Since water overflowed from the inner tub 200 and water discharged from the inner tub 200 enter the outer tub 300 during the operation of the washing course, lint or other foreign materials carried in the water may not be sufficiently discharged from the outer tub 300, and remain between the inner tub 200 and the outer tub 300. In the above-described aspects, the laundry treating apparatus washes the outer wall of the inner tub 200 and the inner wall of the outer tub 300 using the water collected in the outer tub 300 before the final rinsing stage starts to drain water, so that it is possible to prevent lint or dirt from remaining between the inner tub 200 and the outer tub 300 as much as possible. In this way, when the laundry treating apparatus runs the washing course next time, it is possible to prevent the laundry from being affected by the filth dirt left in the previous time being carried in when the outer tub 300 returns to the inner tub 200.

Meanwhile, the overflow water in the final rinsing stage of the washing procedure is utilized to clean the outer wall of the inner barrel 200 and the inner wall of the outer barrel 300, so that the extra water inlet step is omitted, the total running time of the washing procedure can be saved, the total water consumption of the washing procedure can be saved, and the waste of water resources is avoided. The overflow water in the final rinsing stage is utilized to realize cleaning, on one hand, the situation that the outer cylinder 300 collects the overflow water of the inner cylinder 200 in the subsequent stage of the washing procedure can not occur any more, and thus residues such as thread scraps, dirt and the like are caused, and on the other hand, the cleaning effect is better because the cleaning degree of the overflow water in the final rinsing stage is relatively higher.

In a further aspect of this embodiment, the water level in the outer cartridge 300 is detected before the inner cartridge 200 is controlled to begin rotating.

If the water level in the outer cylinder 300 is greater than or equal to the third preset water level, the inner cylinder 200 is controlled to start rotating, and the outer wall of the inner cylinder 200 and the inner wall of the outer cylinder 300 are cleaned.

If the water level in the outer cylinder 300 is smaller than the third preset water level, the inner cylinder 200 is controlled to drain water to the outer cylinder 300, and after the set condition is reached, the inner cylinder 200 is controlled to start rotating, and the outer wall of the inner cylinder 200 and the inner wall of the outer cylinder 300 are cleaned.

In the above scheme, the third set water level is less than the overflow water level of the inner cylinder 200 and is higher than the lowest position of the inner cylinder 200. The water level of the overflow of the inner cylinder 200 is the lowest position of the cylinder mouth of the inner cylinder 200.

When the water level in the outer cylinder 300 is greater than or equal to the third preset water level, it indicates that the current water level is higher than the lowest position of the inner cylinder 200, and the bottom area of the inner cylinder 200 is at least partially submerged below the water surface, so that the outer wall of the inner cylinder 200 and the inner wall of the outer cylinder 300 can be cleaned by controlling the rotation of the inner cylinder 200. Meanwhile, the third set water level is set to be smaller than the lowest position height of the drum opening of the inner drum 200, so that water in the outer drum 300 is prevented from flowing back into the inner drum 200 from the drum opening of the inner drum 200 in the cleaning process, and filars or dirt in the water are prevented from affecting the cleaning effect of clothes.

In a preferred embodiment of this embodiment, the first preset water level > the third preset water level > the second preset water level. Since the drain circulation pump 400 is turned on to return water to the inner tub 200 upon detecting that the water level in the outer tub 300 reaches the first preset water level during the rinsing process, the water level in the outer tub 300 should normally be lower than the first preset water level at the end of the final rinsing. If the third preset water level is set to be greater than the first preset water level, the determination condition that the water level in the outer tub 300 is greater than or equal to the third preset water level is not satisfied all the time when the final rinsing stage is just completed, and does not meet the actual use requirement. The first preset water level is set to be slightly lower than the lowest position of the nozzle of the inner cylinder 200, and the third preset water level is set to be smaller than the first preset water level, so that the bottom area of the inner cylinder 200 can be immersed in water under the third preset water level.

The second preset water level is used for controlling the stopping time of water returning to the inner cylinder 200, and the difference value between the second preset water level and the first preset water level determines the water returning amount when water returning to the inner cylinder 200 each time. On the premise that the overflow water collected in the outer barrel 300 is not completely pumped out, the water return amount is as large as possible, so that the frequency of water return can be reduced, the frequency of opening and closing the water discharge circulating pump 400 in the running process of a washing program is further reduced, and the service life of the water discharge circulating pump 400 is prolonged. The third preset water level needs to be higher than the lowest position of the inner cylinder 200, and the second preset water level is set to be smaller than the third preset water level, preferably lower than the lowest position of the inner cylinder 200, so that the height difference between the first preset water level and the second preset water level can be increased as much as possible, and the water return amount of the drain circulation pump 400 when the water is returned to the inner cylinder 200 every time is started is increased.

In this embodiment, for detecting that the water level in the outer tub 300 is less than the third preset water level, the inner tub 200 is controlled to drain to the outer tub 300, and at this time, the drain circulation pump 400 is kept in a closed state, and the water discharged from the inner tub 200 is temporarily stored in the outer tub 300, so that the water level in the outer tub 300 gradually increases. When the set condition is reached, the inner cylinder 200 is controlled to stop draining, and at this time, the water level in the outer cylinder 300 is raised to a level where the bottom of the inner cylinder 200 can be submerged below the water surface. And then the inner cylinder 200 is controlled to continuously rotate at the rotating speed V, and the outer wall of the inner cylinder 200 and the inner wall of the outer cylinder 300 are cleaned.

In one embodiment of the present invention, the setting condition is that the duration of the draining of the inner cylinder 200 to the outer cylinder 300 reaches the first set duration. Specifically, the inner barrel 200 is controlled to be higher than the rotational speed threshold V _m The rotation speed of the centrifugal drain assembly is continuously rotated for a first set period of time to enable the centrifugal drain assembly to open the drain opening to drain a certain amount of water to the outer tub 300, and then the inner tub 200 is controlled to stop rotating. And then the inner cylinder 200 is controlled to start to continuously rotate at the rotating speed V, and the outer wall of the inner cylinder 200 and the inner wall of the outer cylinder 300 are cleaned.

Alternatively, the inner tube 200 may be set to be higher than the rotation speed threshold V _m After the inner cylinder 200 is controlled to rotate continuously for a first set period of time, the inner cylinder 200 is controlled to reduce the rotation speed to the rotation speed V and continuously rotate, so that the aim of cleaning the outer wall of the inner cylinder 200 and the inner wall of the outer cylinder 300 is fulfilled. At this time, the centrifugal drain assembly is reduced by the centrifugal force applied to the centrifugal drain assembly to re-close the drain opening, and the process of draining the inner cylinder 200 to the outer cylinder 300 is stopped.

In another specific aspect of this embodiment, the setting condition is that the water level in the outer cylinder 300 is detected to be equal to or greater than the third set water level. When the water level in the outer tub 300 rises above the third set water level, the bottom region of the inner tub 200 can be submerged under the water surface, and thus a cleaning effect can be achieved by rotating the inner tub 200, so that the inner tub 200 can be controlled to stop draining.

In this embodiment, it is preferable to control the inner tube 200 to stop the water discharge, and to control the duration of the water discharge of the inner tube 200. Because the inner tub 200 rotates at a high speed during the draining process, the water level in the outer tub 300 fluctuates, and thus it may be difficult to accurately detect the water level in the outer tub 300 during the draining process. The water discharge rate of the inner cylinder 200 to the outer cylinder 300 can be tested in advance through experiments by adopting a continuous water discharge time control mode, and the actual water level in the outer cylinder 300 can be controlled within a certain range when the water discharge is stopped by controlling the inner cylinder 200 to rotate at the same rotation speed for water discharge each time.

In a further aspect of this embodiment, the inner cylinder 200 continuously rotates at the rotation speed V to clean the outer wall of the inner cylinder 200 and the inner wall of the outer cylinder 300, and when the duration of rotation reaches the second set duration, the drainage device is controlled to open to drain water outwards.

Further, when the inner cylinder 200 continuously rotates at the rotation speed V for a second set period of time, the rotation speed of the inner cylinder 200 is controlled to rise to be greater than the rotation speed threshold V _m So that the centrifugal drain assembly opens the drain opening and water in the inner tub 200 can drain into the outer tub 300. At the same time, the drain circulation pump 400 is controlled to be turned on, and water in the outer tub 300 is discharged through the drain pipe 402.

In the above-mentioned scheme, after the inner tub 200 is continuously rotated at the rotation speed V for a certain time and the cleaning of the outer wall of the inner tub 200 and the inner wall of the outer tub 300 is completed, the normal draining operation can be performed, and on one hand, the water collected in the outer tub 300 is drained, and on the other hand, the final rinse water in the inner tub 200 is completely drained.

In this embodiment, in the final rinsing stage of the washing process, the inner tub 200 is drained to be stored in the outer tub 300, and the water in the outer tub 300 is agitated by controlling the rotation of the inner tub 200, thereby achieving the effect of cleaning the outer wall of the inner tub 200 and the inner wall of the outer tub 300. Through the above-mentioned cleaning process, impurities such as lint and dirt which may adhere to the outer wall of the inner tub 200 and the inner wall of the outer tub 300 in the present washing process can be removed, so that bacteria can be prevented from growing between the inner tub 200 and the outer tub 300 during the shutdown of the laundry treatment apparatus due to the lint and dirt, and pollution to laundry is prevented when the washing process is performed next time from the outer tub 300 to the inner tub 200.

Example IV

As shown in fig. 1 and 3, this embodiment is further defined by the third embodiment, and the laundry treating apparatus further includes a flushing pipe (not shown in the drawings), one end of which is in communication with the water inlet valve 501 of the laundry treating apparatus, and the other end of which is disposed between the inner tub 200 and the outer tub 300, and is capable of spraying water between the inner tub 200 and the outer tub 300.

In this embodiment, the control method of the laundry treating apparatus further includes: before the dehydration is finished, water is sprayed between the inner cylinder 200 and the outer cylinder 300 through the flushing pipeline, and the outer wall of the inner cylinder 200 and/or the inner wall of the outer cylinder 300 are flushed.

As a first specific implementation manner of this embodiment, the water outlet end of the flushing pipeline is disposed towards the outer wall of the inner cylinder 200, and the flushing water flows out from the water outlet end of the flushing pipeline and can be sprayed onto the outer wall of the inner cylinder 200, so as to flush the outer wall of the inner cylinder 200, and further remove the wire scraps or other dirt possibly remaining outside the inner cylinder 200.

As a second specific implementation manner of this embodiment, the water outlet end of the flushing pipe is disposed towards the inner wall of the outer cylinder 300, and the flushing water flows out from the water outlet end of the flushing pipe and can be sprayed onto the inner wall of the outer cylinder 300, so as to flush the inner wall of the outer cylinder 300, and further remove the wire scraps or other dirt possibly remained inside the outer cylinder 300.

As a third specific implementation manner of this embodiment, the water outlet end of the flushing pipeline is provided with two spray heads, which are respectively disposed towards the outer wall of the inner cylinder 200 and the inner wall of the outer cylinder 300. The flushing water in the flushing pipeline flows out from the two spray heads respectively and is sprayed to the outer wall of the inner cylinder 200 and the inner wall of the outer cylinder 300, so that the outer wall of the inner cylinder 200 and the inner wall of the outer cylinder 300 can be flushed simultaneously, and the cleaning of the filth or other dirt is more thorough.

In the above-mentioned scheme, the water inflow of the spray flushing through the flushing pipeline is very small, and if the water inflow is collected in the outer cylinder 300, the water inflow is preferably insufficient to overflow the lowest part of the inner cylinder 200, so that water accumulation in the outer cylinder 300 is avoided in the flushing process. By washing and cleaning the outer wall of the inner cylinder 200 and the inner wall of the outer cylinder 300 before the dehydration is finished, the wire scraps or other dirt possibly remained can be removed more thoroughly, and the cleaning degree between the inner cylinder 200 and the outer cylinder 300 is ensured.

In a preferred embodiment of the present embodiment, the laundry treating apparatus sprays water into the space between the inner tub 200 and the outer tub 300 to wash and clean the outer wall of the inner tub 200 and the inner wall of the outer tub 300 when the final dehydration is about to be completed.

Near the end of the final dewatering, little more water flows from the inner cartridge 200 into the outer cartridge 300 and no lint can re-enter between the inner cartridge 200 and the outer cartridge 300. At this time, the outer wall of the inner cylinder 200 and the inner wall of the outer cylinder 300 are washed and cleaned, on one hand, the thread scraps or dirt which cannot be washed out in the process of rotating and cleaning the inner cylinder 200 can be removed, so that more thorough cleaning is realized, and on the other hand, the thread scraps or dirt which remain between the inner cylinder 200 and the outer cylinder 300 during final rinsing and draining or final dewatering are washed out, so that no dirt remains between the inner cylinder 200 and the outer cylinder 300 after the running of the washing program is finished.

Further preferably, in the spray rinsing process, the dehydration process of the inner cylinder 200 rotating at a high speed is continuously performed, so that the inflow water is sprayed to the surface of the inner cylinder 200 rotating at a high speed, and the relative movement speed of the inflow water and the inner cylinder 200 can be increased when the inflow water contacts the inner cylinder 200, so that the rinsing force of the inflow water to the inner cylinder 200 is enhanced, and the dirt attached firmly is removed more thoroughly. Meanwhile, the high-speed rotation of the inner cylinder 200 can also enable water flow sprayed to the surface to generate splashing, so that the flushing water is further splashed in multiple directions, and the omnibearing flushing effect between the inner cylinder 200 and the outer cylinder 300 is realized.

In the spray rinsing process, the drain circulation pump 400 maintains an operating state, and can timely discharge the rinse water sprayed between the inner tub 200 and the outer tub 300 to the outside, so that no residual water exists in the outer tub 300 after the washing process is finished.

In this embodiment, when the final dehydration is about to end, the inner wall of the inner cylinder 200 and the outer wall of the outer cylinder 300 can be rinsed and cleaned by spraying the inflow water between the inner cylinder 200 and the outer cylinder 300, so that the dirt possibly remained can be further removed, and the inner cylinder 200 and the outer cylinder 300 can be kept more thoroughly clean.

The foregoing description is only illustrative of the preferred embodiment of the present invention, and is not to be construed as limiting the invention, but is to be construed as limiting the invention to any and all simple modifications, equivalent variations and adaptations of the embodiments described above, which are within the scope of the invention, may be made by those skilled in the art without departing from the scope of the invention.

Claims

1. A control method of a laundry treatment apparatus, the laundry treatment apparatus comprising:

an inner cylinder for containing water;

the control method is characterized by comprising the following steps: detecting the water level in the water collecting device to be greater than or equal to a first preset water level, and controlling the circulating device to return water from the water collecting device to the inner cylinder.

2. The control method of a laundry treatment apparatus according to claim 1, further comprising: detecting that the water level in the water collecting device is smaller than a second preset water level, and controlling the circulating device to stop backwater to the inner cylinder;

3. A control method of a laundry treatment apparatus according to claim 1 or 2, wherein the circulation device includes a circulation pipe and a circulation pump provided on the circulation pipe, one end of the circulation pipe being communicated with the water collecting device, the other end being communicated with the inner tub;

4. A control method of a laundry treatment apparatus according to claim 1 or 2, wherein the laundry treatment apparatus performs detection of the water level in the water collecting means for controlling whether the circulation means returns water to the inner tub during a rinsing phase operation of the laundry program or during an operation of the high water level laundry program;

5. The control method of a laundry treatment apparatus according to claim 1, wherein the water collecting device is an outer tub coaxially provided with the inner tub, the laundry treatment apparatus further comprising a water discharging device for controlling water collected in the outer tub to be discharged outwardly;

6. The control method of a laundry treating apparatus according to claim 5, further comprising, before controlling the rotation of the inner tub: detecting that the water level in the outer cylinder is greater than or equal to a third preset water level, and controlling the inner cylinder to start rotating to clean the outer wall of the inner cylinder and/or the inner wall of the outer cylinder;

7. The control method of a laundry treating apparatus according to claim 6, wherein if the water level in the outer tub is less than a third preset water level, the inner tub is controlled to drain water to the outer tub;

8. The control method of laundry treating apparatus according to claim 7, wherein the set condition is that a duration of draining the inner tub to the outer tub reaches a first set duration;

9. A control method of a laundry treating apparatus according to any one of claims 5 to 8, wherein the inner tub is continuously rotated for washing for a second set period of time, and the drain means is controlled to open the drain outwardly.

10. The control method of a laundry treatment apparatus according to any one of claims 5 to 8, further comprising: before dehydration is finished, inflow water is sprayed between the inner cylinder and the outer cylinder, and the outer wall of the inner cylinder and/or the inner wall of the outer cylinder are washed.