CN105420989B - Washing machine and control method of washing machine with circulating water filtering system - Google Patents
Washing machine and control method of washing machine with circulating water filtering system Download PDFInfo
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- CN105420989B CN105420989B CN201410488185.5A CN201410488185A CN105420989B CN 105420989 B CN105420989 B CN 105420989B CN 201410488185 A CN201410488185 A CN 201410488185A CN 105420989 B CN105420989 B CN 105420989B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The invention provides a washing machine and a control method of the washing machine with a circulating water filtering system. The washing machine includes: a filter assembly configured to controllably filter water discharged from a wash tub of the washing machine; a water purification circuit configured to recycle filtered produced water flowing from a water producing port of the filter assembly back into the wash bowl for reuse; and a flow path switching device configured to control switching of the water purification loop. The embodiment of the invention prevents the pollution of the filter membrane or the membrane wire of the filter assembly caused by the washing water entering the fine filter of the filter assembly by controlling the on-off of the water purifying loop so as to ensure the reliable operation of the fine filter.
Description
Technical Field
The present invention relates to a washing machine, and more particularly, to a washing machine having a circulating water filtering system and a control method thereof.
Background
The one-time washing routine of the existing conventional washing machine at the time of washing laundry generally includes water intake, washing-spin-drain, multiple rinsing-spin-drain, etc., wherein a large amount of fresh water is consumed for washing and each rinsing. The water used for washing or rinsing is discharged to the environment outside the washing machine through a drain line. The water consumption in the whole washing process is relatively large, and water resources are greatly wasted.
In order to achieve the aim of saving water of the washing machine, the prior art generally adopts the following scheme to treat the washing wastewater:
scheme 1: the water storage tank is added in the washing machine to collect rinsing water, and a filter screen is arranged to simply filter the collected rinsing water and then apply the rinsing water to the next washing process.
Scheme 2: the reverse osmosis filter is added in the washing machine to purify the washing wastewater, and the purified water is applied to the next washing process.
Scheme 3: the washing wastewater is purified by using auxiliary equipment such as a large-scale water treatment device and an ozone generator, and the purified water is applied to the next washing process.
However, the practical application effects of the above solutions are not ideal, mainly for the following reasons.
The added filter screen and water storage tank of scheme 1 can only simply remove lint from the rinse water. However, since the rinse water has a large amount of impurities, the quality of the rinse water is unstable, so that scheme 1 cannot truly solve the quality problem of the rinse water. Moreover, this solution generally requires manual cleaning of the tank and the filter screen, which is inconvenient to maintain.
The scheme 2 uses the reverse osmosis filter to purify the washing wastewater, which not only needs to use a high-pressure pump, but also has slow purification water production rate, and the water yield is difficult to ensure the normal use requirement of the washing machine. In addition, this solution requires periodic replacement of the reverse osmosis filter, which is costly.
In the scheme 3, auxiliary equipment such as a large-scale water treatment device and an ozone generator are used for purifying the washing wastewater, the auxiliary equipment is high in price and large in occupied space, a plurality of matched devices and related cleaning devices are needed, the equipment cost and the maintenance cost are further greatly increased, and the washing wastewater purifying device is not suitable for common families.
Disclosure of Invention
An object of the present invention is to overcome at least one of the drawbacks of the prior art washing machines and to provide a washing machine with a circulating water filtration system that is compact and easy to install. Another object of the present invention is to provide a control method of a washing machine having a circulating water filtration system.
According to one aspect of the present invention, there is provided a washing machine including:
a filter assembly configured to controllably filter water discharged from a wash tub of the washing machine;
a water purification circuit configured to recycle filtered produced water flowing from a water producing port of the filter assembly back into the wash bowl for reuse; and
and the flow path switching device is configured to control the switching of the water purifying loop.
Optionally, the flow path on-off device is further configured to: the water purifying circuit is conducted when the filtering assembly filters water discharged from a washing tub of the washing machine.
Optionally, the washing machine further comprises:
an air pump configured to provide an air flow to air-wash the filter assembly, an air outlet of the air pump being in communication with an air inlet of the filter assembly;
the flow path on-off device is further configured to: when the air pump provides air flow to perform air washing on the filtering component, the water purifying circuit is disconnected.
Optionally, the filter assembly comprises a coarse filter and a fine filter downstream of the coarse filter, the coarse filter and fine filter being provided as a unitary assembly, wherein
The water outlet cavity of the coarse filter is provided with an air inlet which is used as the air inlet of the filtering component,
the inlet of the water inlet cavity of the coarse filter is communicated with the outlet of the water discharge pump of the washing machine,
the outlet of the water outlet cavity of the coarse filter is communicated with the inlet of the fine filter, and
the outlet of the fine filter is used as a water producing port of the filtering component; and is also provided with
The thick exhaust port of the water inlet cavity of the coarse filter is controllably communicated with the outer exhaust pipeline of the washing machine,
the flow path on-off device is further configured to: when the washing water in the washing cylinder is sequentially discharged out of the washing machine through the inlet of the water inlet cavity and the concentrated discharge port of the coarse filter, the water purifying loop is disconnected so as to prevent the water entering the water inlet cavity from flowing upwards into the fine filter.
Optionally, the flow path on-off device is further configured to: when the air flow is utilized to carry out air washing on the coarse filter, the water purifying circuit is disconnected, so that the air flow for carrying out air washing on the coarse filter is completely discharged to the discharge pipeline through the concentrated discharge port.
Optionally, the fine filter further has a drain port controllably communicating with an drain line of the washing machine,
the flow path on-off device is further configured to:
when the air flow is utilized to carry out air washing on the fine filter, and the passage between the concentrated exhaust port and the exhaust pipeline of the washing machine is disconnected, the water purification loop is disconnected, so that the air flow for carrying out air washing on the fine filter is completely exhausted to the exhaust pipeline through the sewage outlet.
Optionally, the washing machine further comprises:
an electronically controlled three-way valve having a clean port and a rich drain port for fluid inflow, and a drain port for fluid outflow; wherein the method comprises the steps of
The cleaning port is communicated with the sewage outlet of the fine filter,
the thick exhaust port is communicated with a thick exhaust port of the water inlet cavity of the coarse filter,
the discharge port is communicated with an outer discharge pipeline of the washing machine;
the flow path on-off device is further configured to: and when the cleaning port is communicated with the discharge port or the concentrated discharge port is communicated with the discharge port, the water purifying circuit is disconnected.
Optionally, the flow path on-off device is further configured to: when the filter assembly does not filter water discharged from a washing tub of the washing machine, the water purifying circuit is disconnected.
According to another aspect of the present invention, there is provided a control method of a washing machine having a circulating water filtration system including a filtration assembly, the control method comprising:
when the filtering component filters water discharged from the washing cylinder of the washing machine, a flow path between the water producing port of the filtering component and the washing cylinder is conducted so that filtered water produced from the water producing port of the filtering component is circulated back to the washing cylinder for reuse.
Optionally, the control method further includes:
when the filter assembly does not filter water discharged from a washing drum of the washing machine, a flow path between a water generating port of the filter assembly and the washing drum is disconnected.
In the washing machine of the present invention, the coarse filter and the fine filter of the circulating water filtration system are connected as an integral unit, which not only makes the circulating water filtration system compact, but also makes the installation/removal more convenient.
Further, the embodiment of the invention prevents the washing water from entering the fine filter of the filter assembly to pollute the filter membrane or the membrane wire thereof by controlling the on-off of the water purifying loop so as to ensure the reliable operation of the fine filter.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
fig. 1 shows a schematic principle view of a washing machine according to an embodiment of the present invention;
fig. 2 shows a schematic flowchart of a control method of a washing machine according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic diagram of a washing machine according to an embodiment of the present invention. The washing machine may include a wash tub 12, a drain pump 22, a water purification circuit 14, a flow path on-off device 19, and a circulating water filtration system having a filtration assembly. The wash tub 12 is generally comprised of an outer tub and an inner tub rotatable within the outer tub. The upper part of the washing cylinder 12 is provided with a clean water inlet which is connected with a tap water port through a pipeline 11, and when an electromagnetic valve 13 on the pipeline 11 is opened, clean water for washing or clean water for rinsing can be injected into the washing cylinder 12. The lower part of the washing drum 12 is provided with a water outlet, and the water outlet is communicated with the filtering assembly through a pipeline by a drainage pump 22. The filter assembly is configured to controllably filter water discharged from the washing machine's wash bowl 12. The drain pump 22 may be used to pump water from the wash tank 12 to a filter assembly for filtration, as desired, for example, during a washing or rinsing sequence of a washing machine.
The clean water circuit 14 may be configured to recycle filtered product water flowing from the water producing port of the filter assembly back into the wash tank 12 for reuse. One end of the water purification circuit 14 may be in communication with the water producing port of the filter assembly and the other end in communication with the wash drum 12. The water filtered by the filter assembly flows out of the water producing port of the filter assembly and flows into the washing drum 12 through the water purifying loop 14. The flow path switching device 19 may be configured to control switching of the water purification circuit 14. In one embodiment, the flow path switching device 19 may be an electrically controlled valve that may be provided on the clean water circuit 14 between the water producing port of the filter assembly and the wash drum 12 to switch on or off the clean water circuit 14.
In a preferred embodiment, the flow path switching device 19 may be further configured to: when the filter assembly filters water discharged from the washing tub 12 of the washing machine, the water purifying circuit 14 is conducted. For example, when it is necessary to circularly filter the rinse water in the wash tub 12, the flow path switching device 19 is opened to conduct the water purification circuit 14. At this point, the drain pump 22 is activated, pumping the rinse water from the wash tub 12 into the filter assembly. The water entering the filter assembly is filtered and flows out of the water producing port and into the clean water circuit 14 for return to the wash tank 12.
The filtering component provided by the embodiment of the invention adopts a screening principle as a separation principle, can effectively reduce residual thread scraps of clothes, and can effectively remove particles, colloid, bacteria, microorganisms and high molecular organic matters in rinse water so as to purify and recycle the wash water or rinse water, thereby achieving the purpose of saving water. However, as the washing times of the washing machine are increased, separated substances and other impurities gradually accumulate on the surface of the filter assembly, so that the filter membrane and/or membrane wires in the filter assembly are blocked and polluted, and the filtering effect of the filter assembly is affected to a certain extent. To restore the filtration flux of the filter assembly, the filter assembly may be air-washed.
The washing machine of the present invention may further include an air pump 32 configured to provide an air flow to air wash the filter assembly. Accordingly, the bottom of the filter assembly may be provided with an air inlet for receiving an air flow, and the air outlet of the air pump 32 communicates with the air inlet of the filter assembly via an air flow line. A one-way valve 34 is provided in the air flow line, and when the one-way valve 34 is opened, air flow can only flow from the air outlet of the air pump 32 to the air inlet of the filter assembly, but fluid (air flow or water flow) in the filter assembly cannot flow to the air outlet of the air pump 32. When the check valve 34 is closed, the air outlet of the air pump 32 is not in communication with the air inlet of the filter assembly. When the air pump 32 and the check valve 34 are opened, the air pump 32 provides an air flow to the filter assembly to loosen impurities trapped or adhered within the filter assembly by the air flow. The filter assembly may also have an outlet for the flow of gas wash gas out of the filter assembly such that the flow of gas into the filter assembly exits the outlet. The flow path switching device 19 is further configured to: when the air pump 32 provides an air flow to air wash the filter assembly, the water purification circuit 14 is disconnected. Thus, the air flow entering the filter assembly can be prevented from flowing out of the water outlet of the filter assembly, and then flows into the washing cylinder 12, so that the air pressure in the washing cylinder 12 is increased, and potential safety hazards are brought. By disconnecting the water purification circuit 14, the air-wash air flows can all flow out from the outlet, which is beneficial to ensuring the air-wash effect.
In some embodiments, the filter assembly may include a coarse filter 24 and a fine filter 26 downstream of the coarse filter 24. The coarse filter 24 and the fine filter 26 are fixed together in a vertical direction, and water from the inside 12 of the wash bowl flows from the bottom-most coarse filter 24 to the top-most fine filter 26 (as will be appreciated by those skilled in the art, "upstream" and "downstream" in the present invention are in terms of the direction of fluid flow in the pipes and corresponding components). In other embodiments of the invention, the filter assembly may also include three, four or more filters in series to provide the desired multi-stage filtration of the water from within the wash tank 12.
In embodiments of the present invention, the coarse filter 24 and the fine filter 26 are preferably provided as a unitary assembly, as will be apparent to those skilled in the art, where the so-called "unitary assembly" may include either: (1) the housings of the coarse filter 24 and the fine filter 26 are integral; (2) The housings of the coarse filter 24 and the fine filter 26 are not integral, but are directly connected to each other, i.e., the flow path communication between them is not through other intermediate lines (e.g., the housing of the coarse filter 24 and the housing of the fine filter 26 are sealingly connected). Thus, the circulating water filtering system is compact in structure and convenient to install/detach.
In some embodiments, the coarse filter 24 may have a water inlet chamber and a water outlet chamber separated by a screen (not shown), and water entering the water inlet chamber is filtered by the screen and enters the water outlet chamber. Wherein the inlet chamber has an inlet for receiving fluid flowing into the filter and the outlet chamber has an outlet for filtered fluid flowing out of the filter. The inlet of the water inlet chamber of the coarse filter 24 communicates with the outlet of the drain pump 22 of the washing machine. The water pumped from the wash tub 12 by the drain pump 22 enters the inlet chamber of the coarse filter 24 and flows into the outlet chamber after being filtered. The fine filter 26 of the embodiment of the present invention may include an inlet, an inner cavity, and an outlet, wherein the inner cavity is filled with membrane wires, and water filtered by the coarse filter 24 enters the inner cavity of the fine filter 26 from the inlet, and flows out from the outlet after being filtered by the inner membrane wires. The outlet of the fine filter 26 may serve as the water outlet for the entire filter assembly. The outlet of the fine filter 26 is connected to the wash bowl 12 through the clean water circuit 14 so as to return the water filtered by the fine filter 26 back to the wash bowl 12.
The lower end of the coarse filter 24 of the embodiment of the present invention is provided with an air inlet which is communicated with the water outlet cavity of the coarse filter 24, so as to be used as the air inlet of the filtering assembly. In some embodiments, to make the air pressure of the air generated by the air pump 32 more uniform and reduce the air pressure loss of the air flow for better air washing, the air pump 32 may be disposed adjacent to the air inlet of the coarse filter 24 such that the air outlet of the air pump 32 is closer to the air inlet of the coarse filter 24.
In some embodiments, the coarse filter 24 is also specifically configured with a rich drain from which fluid (e.g., a gas-or water-wash stream) that cleans the coarse filter 24 may drain in communication with the water inlet chamber of the coarse filter 24. The rich drain may communicate with the outer drain line 18 of the washing machine through a rich drain. The water in the washing tub 12 can be discharged from its rich drain to the outside of the washing machine without being filtered through the water inlet chamber of the coarse filter 24. For example, in the case where the concentration of wash water in the washing program of the washing machine is high, it is not suitable to circularly filter it using the filter assembly, the washing machine may be discharged through the water inlet chamber of the coarse filter 24. This allows the drain line portion of the washing machine to be formed by the inlet chamber of the coarse filter 24, reducing the internal plumbing of the washing machine. In this process, dirt attached to the filter screen in the water inlet chamber of the coarse filter 24 is discharged to the outside of the washing machine together with water, thereby simultaneously performing a cleaning function of the coarse filter 24.
In the preferred embodiment of the present invention, the fine filter 26 is an ultrafiltration membrane module. The ultrafiltration membrane component is applied to the washing machine to circularly filter rinsing water of the washing machine, so that particles, colloid, high molecular organic substances, bacteria, microorganisms and the like in the rinsing water can be filtered out, and the rinsing water is purified and recycled, thereby achieving the aim of saving water.
Due to the serial design of the fine filter 26 and the coarse filter 24, and in particular the structural design of the integrated component, when the washing water is discharged through the water inlet cavity of the coarse filter 24, the washing water enters the water outlet cavity thereof through the filter screen of the coarse filter 24 under the pressure of the drainage pump 22, and the air in the water outlet cavity is compressed to raise the water level in the water outlet cavity. Meanwhile, under the pressure of the drainage pump 22, part of the washing water passively enters the inner cavity of the fine filter 26 for filtering and flows out from the water outlet. During this process, impurities in the washing water gradually accumulate on the surface of the filter membrane or membrane wire inside the fine filter 26, causing problems of clogging and contamination of the fine filter 26, lowering its operational stability, and affecting its service life.
Thus, in the preferred embodiment of the present invention, when water in the wash bowl 12 is discharged from the washing machine through the inlet and the concentrate discharge of the inlet chamber of the coarse filter 24, the flow path switching device 19 breaks the clean water circuit 14 to form a closed, sealed chamber within the filter assembly so that water entering the inlet chamber of the coarse filter 24 does not enter the fine filter 26.
In the washing machine according to the embodiment of the present invention, if the flow path on-off device 19 capable of controlling on-off of the water purifying circuit 14 between the water producing port of the filter assembly and the washing drum 12 is not provided, when the washing water is discharged to the outside of the washing machine after the washing stage is completed, the washing water enters the water outlet chamber thereof through the filter screen of the coarse filter 24 under the pressure of the drain pump 22, and compresses the air inside the water outlet chamber to raise the water level in the water outlet chamber. Meanwhile, under the pressure of the drainage pump 22, part of the washing water passively enters the inner cavity of the fine filter 26 for filtering and flows out from the water outlet. This can contaminate the assembly and affect the performance of the assembly, degrading its operational stability.
According to the embodiment of the invention, the flow path on-off device 19 capable of controlling the on-off of the water purifying loop 14 is arranged on the water purifying loop, so that the flow path on-off device 19 is kept open when the filtering component carries out purified water recycling, and the filtering component carries out circulating filtration to produce water.
When the filtering component does not filter the water in the washing barrel 12, the flow path on-off device 19 is kept closed to disconnect the flow path between the water producing port of the filtering component and the washing barrel 12, so that the washing water is not filtered.
Further, when the washing water is discharged, the flow path switching device 19 is kept closed, and a closed cavity can be formed in the fine filter 26, so that the washing water cannot enter the fine filter 26 and is filtered. Thereby avoiding the pollution of the filter membrane or the membrane wire caused by the washing water entering the fine filter 26 to ensure the reliable operation of the fine filter 26.
In some embodiments, the fine filter 26 may also be provided with a drain port that is controllably in communication with the drain line of the washing machine such that fluid that cleans the fine filter 26 (e.g., air-wash air flow or water-wash water flow, which is not filtered by the fine filter for water-wash water flow) is discharged from the drain port. The rich drain of the coarse filter 24 and the drain of the fine filter 26 may serve as the drain for the filter assembly exhaust stream. Accordingly, in some embodiments, the air pump 32 may effect air washing of the coarse filter 24 and the fine filter 26, respectively, by opening different discharge ports as the air pump pumps air flow to the air inlet of the water outlet chamber of the coarse filter 24.
As described above, in order to prevent the air flow portion entering the water inlet chamber of the coarse filter 24 from flowing out of the water producing port of the filter assembly and further into the washing tub 12, the flow path switching device 19 is configured to disconnect the water purifying circuit 14 when the filter assembly is air-washed.
Accordingly, when the coarse filter 24 is air-washed or the fine filter 26 is air-washed by the air pump 32, the flow path switching device 19 is also configured to disconnect the water purifying circuit 14. Meanwhile, in order to ensure a better air washing effect, when the coarse filter 24 performs air washing, a drain outlet of the fine filter 26 and a passage of the outer discharge pipeline 12 of the washing machine can be disconnected; when the fine filter 26 is air-washed, the passage between the rich drain of the coarse filter 24 and the drain line 12 of the washing machine is interrupted.
Further, the washing machine of the embodiment of the present invention may further include an electronically controlled three-way valve 36 having a cleaning port b and a rich drain port a for inflow of fluid, and a drain port c for outflow of fluid. The cleaning port b communicates with the drain of the fine filter 26, the rich drain port a communicates with the rich drain of the water intake chamber of the coarse filter 24, and the drain port c communicates with the discharge line 18 of the washing machine. The electronically controlled three-way valve 36 may be configured to turn off the other ports when two ports are turned on or to simultaneously turn off three ports. When the concentrated discharge port a and the discharge port c of the electric control three-way valve 36 are communicated, water flow entering the water inlet cavity of the coarse filter 24 or air flow entering the water outlet cavity of the coarse filter 24 can be used for washing the coarse filter 24 with water or air respectively; and the water-washed water stream or the air-washed air stream may be discharged directly from its dense discharge to the outer drain line 18. In addition, when the concentrated drain port a is communicated with the drain port c, the washing water in the washing drum 12 can be directly discharged from the concentrated drain to the drain pipe 18 through the water inlet of the coarse filter under the action of the drain pump 22.
When the cleaning port b and the discharge port c of the electric control three-way valve 36 are communicated, water flow entering the water inlet cavity of the coarse filter 24 or air flow entering the water outlet cavity of the coarse filter 24 can enter the fine filter 26 through the outlet of the coarse filter 24 so as to wash the fine filter 26 with water or air; and the water-washed or air-washed fluid may be discharged directly from the drain of the fine filter 26 to the drain line 18.
To prevent the water flow from entering the fine filter 26 to be passively filtered when the coarse filter 24 and the fine filter 26 are washed with water, the water purification circuit 14 may be disconnected when the coarse filter 24 is washed with water or the fine filter 26 is washed with water.
As can be seen from the above description, for the washing machine according to the embodiment of the present invention, when the rich drain port a is connected to the drain port c, three cases are corresponded: namely, air-washing the coarse filter 24, water-washing the coarse filter 24, and discharging the washing water in the washing tub 12. For all three cases, fluid entering the coarse filter 24 is directly discharged from the rich drain of the coarse filter 24, and none of the fluid entering the coarse filter 24 is expected to flow into the fine filter 26. Thus, the flow path switching device 19 may be further configured to: when the rich drain port a is turned on with the drain port c, the water purification circuit 14 is disconnected.
Further, when the cleaning port b is in communication with the discharge port c, it corresponds to two cases: namely a gas wash fine filter 26 and a water wash fine filter 26. For both cases, fluid entering the coarse filter 24 enters the fine filter 26 and is discharged directly from the drain of the fine filter 26, and none of the fluid entering the fine filter 26 is expected to exit through the outlet of the fine filter 26 (i.e., the water producing port of the filter assembly). Thus, the flow path switching device 19 may be further configured to: when the cleaning port b is connected to the discharge port c, the water purifying circuit 14 is disconnected.
The embodiment of the invention also provides a control method for the washing machine with the circulating water filtering system, wherein the circulating water filtering system comprises the filtering assembly of any embodiment. The control method comprises the following steps: when the filter assembly filters water discharged from the washing tub 12 of the washing machine, a flow path between the water producing port of the filter assembly and the washing tub 12 is conducted so that filtered water produced from the water producing port of the filter assembly is circulated back to the washing tub 12 for reuse.
In some embodiments, the filter assembly has an air inlet, and the control method of the present invention may further comprise: when the filter assembly is air washed with an air stream, the flow path between the water producing port of the filter assembly and the wash bowl 12 is broken. So as to prevent the air flow entering the filter assembly from flowing out of the water outlet of the filter assembly and then flowing into the washing cylinder 12, and increase the air pressure in the washing cylinder 12, thereby bringing potential safety hazard; meanwhile, by disconnecting the flow path between the water producing port of the filter assembly and the washing drum 12, the air washing air flows out of the water producing port, which is beneficial to ensuring the air washing effect.
In some embodiments, the filter assembly includes a coarse filter 24 and a fine filter 26 downstream of the coarse filter 24, wherein the coarse filter 24 and the fine filter 26 are provided as an integral assembly as previously described. The outlet chamber of the coarse filter 24 has an inlet port which serves as the inlet port of the filter assembly, and the inlet port of the inlet chamber of the coarse filter 24 is communicated with the outlet port of the drain pump 22 of the washing machine, the outlet port of the outlet chamber of the coarse filter 24 is communicated with the inlet port of the fine filter 26, and the outlet port of the fine filter 26 serves as the water producing port of the filter assembly; and the rich drain of the inlet chamber of the coarse filter 24 is controllably connected to the discharge line 18 of the washing machine, for example by means of an electrically controlled valve. The control method of the embodiment of the invention can further comprise the following steps: when the washing water in the washing drum 12 is discharged out of the washing machine through the inlet, the concentrated discharge and the discharge pipeline 18 of the water inlet cavity of the coarse filter 24 in sequence, the flow path between the water producing port of the filter assembly and the washing drum 12 is disconnected, so that the water entering the water inlet cavity is prevented from flowing upwards into the fine filter 26, the problem of blockage and pollution of the fine filter 26 is caused, the operation stability is reduced, and the service life of the fine filter is influenced.
In the washing machine according to the embodiment of the present invention, if the flow path on-off device 19 capable of controlling on-off of the water outlet of the filter assembly and the washing drum 12 is not provided on the flow path between the water outlet of the filter assembly and the washing drum 12, when the washing water is discharged to the outside of the washing machine after the washing stage is completed, the washing water enters the water outlet chamber thereof through the filter screen of the coarse filter 24 under the pressure of the drain pump 22, and compresses the air inside the water outlet chamber to raise the water level in the water outlet chamber. Meanwhile, under the pressure of the drainage pump 22, part of the washing water passively enters the inner cavity of the fine filter 26 for filtering and flows out from the water outlet. This can contaminate the assembly and affect the performance of the assembly, degrading its operational stability.
According to the embodiment of the invention, the flow path on-off device 19 capable of controlling the on-off of the water outlet of the filter assembly and the washing barrel 12 is arranged on the flow path between the water outlet of the filter assembly and the washing barrel, so that the flow path on-off device 19 is kept open when the filter assembly carries out water purification recycling, and the filter assembly carries out water filtration and water production recycling.
When the filter assembly does not filter the water in the washing drum 12, the flow path switching device 19 is kept closed to disconnect the flow path between the water producing port of the filter assembly and the washing drum, so that the washing water is not filtered.
Further, when the washing water is discharged, the flow path switching device 19 is kept closed, and a closed cavity can be formed in the fine filter 26, so that the washing water cannot enter the fine filter 26 and is filtered. Thereby avoiding the pollution of the filter membrane or the membrane wire caused by the washing water entering the fine filter 26 to ensure the reliable operation of the fine filter 26.
In some embodiments, the control method of the present invention may further include, when the coarse filter 24 is air-washed with an air flow, breaking a flow path between a water producing port of the filter assembly and the wash drum 12 so that the air flow air-washed with the coarse filter 24 is all discharged to the drain pipe 18 via the rich drain.
In a further embodiment, the fine filter 26 also has a drain port which is controllably connected to the discharge line 18 of the washing machine, for example by an electrically controlled valve, and the control method of the present invention may further comprise: when the air flow is utilized to perform air washing on the coarse filter 24, a flow path between the water producing port of the filter assembly and the washing drum 12 is disconnected, and a drain port of the fine filter 26 and a passage of the outer discharge pipeline 18 of the washing machine are disconnected, so that the air flow for performing air washing on the coarse filter 24 is completely discharged to the outer discharge pipeline 18 through the concentrated discharge port of the coarse filter 24.
Correspondingly, the control method of the embodiment of the invention can further comprise the following steps: when the fine filter 26 is air-washed by the air flow, the flow path between the water producing port of the filter assembly and the washing drum 12 is disconnected, and the concentrated discharge port of the coarse filter 24 and the passage of the discharge pipeline 18 of the washing machine are disconnected, so that the air flow for air-washing the fine filter 26 is discharged to the discharge pipeline 18 through the drain port of the fine filter 26.
In some embodiments of the present invention, the control method may further include opening a flow path between a water generating port of the filter assembly and the wash tub 12 when the filter assembly does not filter water discharged from the wash tub 12 of the washing machine.
Fig. 2 illustrates a schematic flowchart of a control method of a washing machine according to an embodiment of the present invention. Referring to fig. 2, the control method of the embodiment of the present invention may be implemented through steps S202 to S208, which are performed after the washing machine is turned on. In this embodiment, the flow path between the water outlet of the filter assembly and the wash bowl 12 is opened by default when the washing machine is turned on. In other embodiments, the flow path between the water outlet of the filter assembly and the wash bowl 12 may be established by default when the washing machine is turned on.
In step S202, it is determined whether the drain pump 22 is started. If not, step S204 is performed.
Step S204, the flow path between the water producing port of the filter assembly and the washing drum 12 is kept disconnected.
If the determination result of step S202 is "Yes", step S206 is performed.
Step S206 continues to determine whether the rich drain of the coarse filter 24 or the drain of the fine filter 26 is in communication with the drain line 18. When the determination is yes, i.e., the rich drain of the coarse filter 24 communicates with the outer drain pipe 18, or the drain of the fine filter 26 communicates with the outer drain pipe 18. Then, if the thick drain of the coarse filter 24 is in communication with the drain line 18 with the drain pump 22 activated, this indicates that the coarse filter 24 is being washed or that the coarse filter 24 is being used to drain the wash water (and possibly rinse water) from the wash tub 12 out of the washing machine; if the drain of the fine filter 26 communicates with the drain line 18, it is indicated that the fine filter 26 is being washed with water. To prevent water entering the water inlet chamber of the coarse filter 24 from flowing into the fine filter 26, step S204 is performed when the determination of step S206 is yes, maintaining the flow path between the water outlet of the filter assembly and the wash bowl 12 open.
When the determination result of step S206 is "no", that is, the thick drain of the coarse filter 24 is not communicated with the drain pipe 18, and the drain of the fine filter 26 is not communicated with the drain pipe 18, it means that the water pumped by the drain pump 22 is not drained out of the washing machine, meaning that the filter assembly will filter the water drained from the washing tub 12 of the washing machine. Thus, step S208 is performed to open a flow path between the water producing port of the filter assembly and the wash bowl 12 so that filtered water produced from the water producing port of the filter assembly is circulated back into the wash bowl 12 for reuse.
In an alternative embodiment, step S206 may also be performed after the washing machine is turned on, to determine whether the drain of the fine filter 26 or the rich drain of the coarse filter 24 is in communication with the drain line 18. If the determination result in step S206 is yes, step S204 is executed to keep the flow path between the water outlet of the filter assembly and the washing drum 12 open; otherwise, step S202 is performed to continue to determine whether the drain pump 22 is activated. If the determination result in step S202 is yes, step S208 is executed to open the flow path between the water producing port of the filter assembly and the washing tub 12, otherwise step S204 is executed to keep the flow path between the water producing port of the filter assembly and the washing tub 12 open.
By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.
Claims (7)
1. A washing machine, comprising:
a filter assembly configured to controllably filter water discharged from a wash tub of the washing machine;
a water purification circuit configured to recycle filtered produced water flowing from a water producing port of the filter assembly back into the wash bowl for reuse; and
a flow path switching device configured to control switching of the water purification loop;
the flow path on-off device is further configured to: when the filtering component filters water discharged from a washing drum of the washing machine, the water purifying circuit is conducted;
an air pump configured to provide an air flow to air-wash the filter assembly, an air outlet of the air pump being in communication with an air inlet of the filter assembly;
the flow path on-off device is further configured to: when the air pump provides air flow to perform air washing on the filtering component, the water purifying loop is disconnected;
the filter assembly comprises a coarse filter and a fine filter downstream of the coarse filter, the coarse and fine filters being provided as an integral assembly, wherein
The water outlet cavity of the coarse filter is provided with an air inlet which is used as the air inlet of the filtering component,
the inlet of the water inlet cavity of the coarse filter is communicated with the outlet of the water discharge pump of the washing machine,
the outlet of the water outlet cavity of the coarse filter is communicated with the inlet of the fine filter, and
the outlet of the fine filter is used as a water producing port of the filtering component; and is also provided with
The thick exhaust port of the water inlet cavity of the coarse filter is controllably communicated with the outer exhaust pipeline of the washing machine,
the flow path on-off device is further configured to: when the washing water in the washing cylinder is sequentially discharged out of the washing machine through the inlet of the water inlet cavity and the concentrated discharge port of the coarse filter, the water purifying loop is disconnected so as to prevent the water entering the water inlet cavity from flowing upwards into the fine filter.
2. A washing machine as claimed in claim 1, characterized in that,
the flow path on-off device is further configured to: when the air flow is utilized to carry out air washing on the coarse filter, the water purifying circuit is disconnected, so that the air flow for carrying out air washing on the coarse filter is completely discharged to the discharge pipeline through the concentrated discharge port.
3. A washing machine as claimed in claim 2, characterized in that,
the fine filter is also provided with a drain outlet which is controllably communicated with an outer drain pipeline of the washing machine,
the flow path on-off device is further configured to:
when the air flow is utilized to carry out air washing on the fine filter, and the passage between the concentrated exhaust port and the exhaust pipeline of the washing machine is disconnected, the water purification loop is disconnected, so that the air flow for carrying out air washing on the fine filter is completely exhausted to the exhaust pipeline through the sewage outlet.
4. A washing machine as claimed in claim 3, further comprising:
an electronically controlled three-way valve having a clean port and a rich drain port for fluid inflow, and a drain port for fluid outflow; wherein the method comprises the steps of
The cleaning port is communicated with the sewage outlet of the fine filter,
the thick exhaust port is communicated with a thick exhaust port of the water inlet cavity of the coarse filter,
the discharge port is communicated with an outer discharge pipeline of the washing machine;
the flow path on-off device is further configured to: and when the cleaning port is communicated with the discharge port or the concentrated discharge port is communicated with the discharge port, the water purifying circuit is disconnected.
5. A washing machine as claimed in claim 1, characterized in that,
the flow path on-off device is further configured to: when the filter assembly does not filter water discharged from a washing tub of the washing machine, the water purifying circuit is disconnected.
6. A control method of a washing machine having a circulating water filtration system including a filtration assembly according to any one of claims 1 to 5, characterized in that the control method includes:
when the filtering component filters water discharged from the washing cylinder of the washing machine, a flow path between the water producing port of the filtering component and the washing cylinder is conducted so that filtered water produced from the water producing port of the filtering component is circulated back to the washing cylinder for reuse.
7. The control method according to claim 6, characterized by further comprising:
when the filter assembly does not filter water discharged from a washing drum of the washing machine, a flow path between a water generating port of the filter assembly and the washing drum is disconnected.
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| CN201410488185.5A CN105420989B (en) | 2014-09-22 | 2014-09-22 | Washing machine and control method of washing machine with circulating water filtering system |
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| CN201410488185.5A CN105420989B (en) | 2014-09-22 | 2014-09-22 | Washing machine and control method of washing machine with circulating water filtering system |
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| CN106930066B (en) * | 2017-04-10 | 2022-05-06 | 青岛海尔洗涤电器有限公司 | Washing machine |
| CN106939501B (en) * | 2017-04-17 | 2021-07-02 | 天津衣联网生态科技有限公司 | Water purification system for washing machine |
| CN116005420A (en) * | 2021-10-21 | 2023-04-25 | 青岛海尔洗衣机有限公司 | Washing machine and control method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0739683A (en) * | 1993-07-27 | 1995-02-10 | Sharp Corp | Washing machine |
| CN201136976Y (en) * | 2007-12-07 | 2008-10-22 | 合肥荣事达洗衣设备制造有限公司 | Washing machine with anion device |
| CN202860901U (en) * | 2012-09-28 | 2013-04-10 | 陶氏环球技术有限责任公司 | Washing machine comprising integrated filter module and air charging device |
| CN103119212A (en) * | 2010-09-13 | 2013-05-22 | Lg电子株式会社 | Method for washing and washing machine |
| CN103343439A (en) * | 2013-07-10 | 2013-10-09 | 合肥荣事达三洋电器股份有限公司 | Washing machine with circulating water filtering system |
| CN103429812A (en) * | 2010-11-22 | 2013-12-04 | 伊莱克斯家用产品股份有限公司 | Method of operating washing machine and washing machine |
| CN103835095A (en) * | 2012-11-26 | 2014-06-04 | 海尔集团技术研发中心 | Clothes washing water recycling device, washing method thereof and water-saving clothes washing control method |
| CN204138931U (en) * | 2014-09-22 | 2015-02-04 | 青岛海尔智能技术研发有限公司 | Washing machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2398947B1 (en) * | 2009-02-23 | 2016-10-26 | LG Electronics Inc. | Washing / drying machine |
-
2014
- 2014-09-22 CN CN201410488185.5A patent/CN105420989B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0739683A (en) * | 1993-07-27 | 1995-02-10 | Sharp Corp | Washing machine |
| CN201136976Y (en) * | 2007-12-07 | 2008-10-22 | 合肥荣事达洗衣设备制造有限公司 | Washing machine with anion device |
| CN103119212A (en) * | 2010-09-13 | 2013-05-22 | Lg电子株式会社 | Method for washing and washing machine |
| CN103429812A (en) * | 2010-11-22 | 2013-12-04 | 伊莱克斯家用产品股份有限公司 | Method of operating washing machine and washing machine |
| CN202860901U (en) * | 2012-09-28 | 2013-04-10 | 陶氏环球技术有限责任公司 | Washing machine comprising integrated filter module and air charging device |
| CN103835095A (en) * | 2012-11-26 | 2014-06-04 | 海尔集团技术研发中心 | Clothes washing water recycling device, washing method thereof and water-saving clothes washing control method |
| CN103343439A (en) * | 2013-07-10 | 2013-10-09 | 合肥荣事达三洋电器股份有限公司 | Washing machine with circulating water filtering system |
| CN204138931U (en) * | 2014-09-22 | 2015-02-04 | 青岛海尔智能技术研发有限公司 | Washing machine |
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