CN213231748U

CN213231748U - Water purifier

Info

Publication number: CN213231748U
Application number: CN202021744403.4U
Authority: CN
Inventors: 王笑晗; 孙天厚
Original assignee: Foshan Midea Qinghu Water Purification Equipment Co ltd; Midea Group Co Ltd
Current assignee: Foshan Midea Qinghu Water Purification Equipment Co ltd; Midea Group Co Ltd
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2021-05-18
Anticipated expiration: 2030-08-19

Abstract

The utility model relates to a water purification technology field provides a water purifier, the water purifier includes: a pre-filter element having a cleaning agent; the water pump is used for driving water to flow from the water inlet of the front filter element to the water outlet of the reverse osmosis filter element. According to the utility model discloses water purifier has the leading filter core of sanitizer through the setting, can realize the washing to the reverse osmosis filter core, need not to dismantle or change the reverse osmosis filter core, can effectively reduce water purifier's use cost.

Description

Water purifier

Technical Field

The utility model relates to a water purification technology field especially relates to a water purifier.

Background

With the improvement of living standard, the water purifier is popular with more and more users, and the reverse osmosis membrane is widely used in the water purifier due to the high-quality filtering performance of the reverse osmosis membrane.

Raw water fed to a water purifier may contain a large amount of impurities such as organic substances or inorganic salts. In the use process of the water purifier, other substances and ions except water molecules are isolated on the concentrated water side of the reverse osmosis membrane, and the deposition of impurities inevitably affects the performance of the reverse osmosis membrane, so that the flow of the water purifier is sharply reduced, the pressure in front of the membrane is increased or the quality of the discharged water is changed.

In an industrial use scene, the reverse osmosis membrane is detached and cleaned by using special cleaning equipment, but the cleaning method is difficult to be applied to a household scene. In a family scene, a user usually replaces the reverse osmosis membrane, and the price of the reverse osmosis membrane is extremely high, so that the use cost of the water purifier is very high.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a water purifier to reduce the use cost of water purifier.

According to the utility model discloses water purifier, include: a pre-filter element having a cleaning agent; the water pump is used for driving water to flow from the water inlet of the front filter element to the water outlet of the reverse osmosis filter element.

According to the utility model discloses water purifier has the leading filter core of sanitizer through the setting, can realize the washing to the reverse osmosis filter core, need not to dismantle or change the reverse osmosis filter core, can effectively reduce water purifier's use cost.

According to the utility model discloses a water purifier still includes: the rear filter element is provided with a cleaning agent, and a water inlet of the rear filter element is connected with a purified water outlet of the reverse osmosis filter element; the first end of wet return with the delivery port of rearmounted filter core links to each other, the water inlet of water pump with the delivery port of leading filter core links to each other, the water inlet of reverse osmosis filter core with the delivery port of water pump links to each other, the second end of wet return with the water inlet of water pump links to each other.

According to the utility model discloses a water purifier, in the cleaner in the leading filter core with in the cleaner of rearmounted filter core one is alkaline, and another is acidity.

According to the utility model discloses a water purifier still includes: and the water return pipe is connected with the water outlet of the rear filter element through the high-voltage switch.

According to the water purifier provided by the embodiment of the utility model, a first one-way valve is arranged between the purified water outlet of the reverse osmosis filter element and the water inlet of the rear filter element, and the first one-way valve is communicated from the reverse osmosis filter element to the rear filter element in one way; the water return pipe is provided with a second one-way valve, and the second one-way valve is communicated with the water pump in a one-way mode from the rear filter element.

According to the utility model discloses a water purifier, the wet return is equipped with back water control valve.

According to the utility model discloses a water purifier still includes: the waste water valve is connected with a waste water port of the reverse osmosis filter element and has a first working state and a second working state with the opening degree larger than the first working state.

According to the utility model discloses a water purifier of an embodiment, the water purifier has washing operating mode and washes the operating mode; in the cleaning working state, the water pump is closed, and the waste water valve is in a first working state; in the flushing working state, the water pump is started, and the waste water valve is in a second working state.

According to the utility model discloses a water purifier still includes: the waste water valve is connected with a waste water port of the reverse osmosis filter element and has a first working state and a second working state with the opening degree larger than that of the first working state; the water purifier has a first cleaning working state, a first washing working state, a second cleaning working state and a second washing working state; in the first cleaning working state, the water pump is closed, the water return control valve is closed, and the waste water valve is in a first working state; in the first flushing working state, the water pump is started, the water return control valve is closed, and the waste water valve is in a second working state; in the second cleaning working state, the water pump is started, the backwater control valve is started, and the wastewater valve is in the first working state; in the second flushing working state, the water pump is started, the backwater control valve is started, and the waste water valve is in the second working state.

The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least: through the leading filter core that sets up the sanitizer, can realize the washing to the reverse osmosis filter core, need not to dismantle or change the reverse osmosis filter core, can effectively reduce the use cost of water purifier.

Furthermore, the cleaning agent in the front filter element is alkaline, and the cleaning agent in the rear filter element is acidic, so that alkaline cleaning is performed in the cleaning process, grease, organic matters, colloid or bacteria remains on the surfaces of impurities can be removed firstly, inorganic salt deposits below the impurities are exposed, and the exposed inorganic salt deposits can be removed efficiently during acid cleaning.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a water purifier according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a water purifier according to another embodiment of the present invention, and an arrow indicates a water flow direction in the first cleaning operation state or the first washing operation state;

fig. 3 is a schematic structural view of a water purifier according to another embodiment of the present invention, and an arrow indicates a water flow direction in the second cleaning operation state or the second flushing operation state;

fig. 4 is a schematic structural view of a water purifier according to another embodiment of the present invention, and an arrow indicates a water flow direction during normal water purification;

fig. 5 is a flow chart illustrating the cleaning of a water purifier according to another embodiment of the present invention.

Reference numerals:

a front filter element 10, a water pump 20, a reverse osmosis filter element 30, a rear filter element 40, a water return pipe 50, a water tap 60,

a water inlet control valve 71, a first check valve 72, a second check valve 73, a water return control valve 74, a high pressure switch 75, a waste water valve 76,

a raw water interface 81, a living water interface 82, a concentrated water interface 83 and a purified water interface 84.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

A water purifier according to an embodiment of the present invention will be described with reference to fig. 1 to 5.

As shown in fig. 1, a water purifier according to an embodiment of the present invention includes: a front filter element 10, a water pump 20 and a reverse osmosis filter element 30.

Wherein, the water inlet of leading filter core 10 can connect former water interface 81, and former water interface 81 can connect former water pipe, for example former water pipe can be for water pipe, and water pump 20 is used for driving water from the water inlet of leading filter core shell 10 to the delivery port of reverse osmosis filter core 30, for example water pump 20 can be the booster pump, and water pump 20's water inlet links to each other with the delivery port of leading filter core 10, and water pump 20's delivery port links to each other with the water inlet of reverse osmosis filter core 30, and pure water interface 84 is connected to the delivery port of reverse osmosis filter core 30.

Leading filter core 10 is used for realizing the prefilter of raw water, can filter big particulate matter such as silt, rust, worm's ovum, red worm in the raw water, and the raw water can be running water, well water etc. leading filter core 10 can be for cotton filter core of PP (polypropylene melt-blown filter core), carbon-point filter core, composite filter core etc..

The pre-filter element 10 has a cleaning agent, which can be integrated into the pre-filter element 10 during the production of the pre-filter element 10 or can be added to the pre-filter element 10 when cleaning of the reverse osmosis filter element 30 is required.

The type of the cleaning agent is determined according to the condition of water quality, if the content of grease, organic matters, colloid or bacteria debris in the water in a certain area is high, the corresponding cleaning agent can be an alkaline cleaning agent, such as sodium carbonate and the like; if the water in a certain area has a high content of calcium and magnesium ions, the corresponding cleaning agent can be an acidic cleaning agent, such as citric acid and the like.

The water pump 20 is used to increase the water pressure at the front end of the reverse osmosis filter element 30, so that water molecules smoothly pass through the reverse osmosis filter element 30, and also can flush the reverse osmosis filter element 30 with relatively high pressure water.

The reverse osmosis membrane is arranged in the reverse osmosis filter element 30, can be an artificial semipermeable membrane, has very small membrane pore diameter, can effectively remove impurities such as dissolved salts, colloid, microorganisms and organic matters in water, and is easy to deposit on one side of the reverse osmosis membrane and block the membrane pore in the use process.

When the pre-filter element 10 with the cleaning agent is installed in the water purifier, raw water enters the pre-filter element 10, the raw water is taken away from the cleaning agent in the pre-filter element 10 as a solvent, water dissolved with the cleaning agent enters the reverse osmosis filter element 30 and can react with impurities deposited on the reverse osmosis filter element 30, sewage obtained after reaction can be discharged from a waste water outlet of the reverse osmosis filter element 30 or discharged through a water tap 60 through a water purifying port of the reverse osmosis filter element 30, and the water pump 20 can be selectively opened or kept normally open in the cleaning process.

After cleaning, raw water enters the front filter element 10, passes through the primary filtration of the front filter element 10, and passes through the reverse osmosis filter element 30 under the pressurization effect of the water pump 20 to filter out impurities such as dissolved salts, colloids, microorganisms, organic matters and the like in the water, so as to obtain purified water.

It can be understood that the front filter element 10 has a rated service life, and the rated service life is usually shorter than that of the reverse osmosis filter element 30, when the front filter element 10 reaches the rated service life, the front filter element 10 needs to be replaced, so when the water purifier replaces the front filter element 10, because the front filter element 10 has a cleaning agent, the cleaning agent in the front filter element 10 can be used to clean the reverse osmosis filter element 30, i.e. the expensive reverse osmosis filter element 30 does not need to be replaced, and after the cleaning is completed, the cleaning agent in the front filter element 10 is consumed, i.e. the cleaning agent is changed into the common front filter element 10, so that the conventional primary filtering function is realized, and the normal filtration of purified water is not affected.

In other words, in the related art, when the filter element of the water purifier is replaced, the front filter element 10 and the reverse osmosis filter element 30 need to be replaced, and since the reverse osmosis filter element 30 is expensive, the practical use cost of the water purifier is high; the utility model discloses the water purifier only needs the lower leading filter core 10 of replacement price when the filter core of change water purifier, utilizes the cleaner realization in leading filter core 10 to the washing of reverse osmosis filter core 30, and the cleaning process need not to dismantle reverse osmosis filter core 30, reduces the in-service use cost of water purifier by a wide margin.

According to the utility model discloses water purifier has leading filter core 10 of sanitizer through the setting, can realize the washing to reverse osmosis filter core 30, need not to dismantle or change reverse osmosis filter core 30, can effectively reduce the use cost of water purifier.

In some embodiments, as shown in fig. 1, the water purifier of the embodiment of the present invention may further include: the domestic water connector 82 is connected with the water outlet of the front filter element 10 through a pipeline, and the connection position of the pipeline is located between the water outlet of the front filter element 10 and the water inlet of the water pump 20. The raw water can meet the domestic application after being primarily filtered by the preposed filter element 10, and the outlet water at the domestic water interface 82 is used for domestic water, such as washing clothes, bathing, washing vegetables and the like.

In some embodiments, as shown in fig. 1, the water purifier of the embodiment of the present invention may further include: and the water inlet control valve 71, wherein the water inlet control valve 71 can be arranged on a pipeline between the water outlet of the prepositive filter element 10 and the water inlet of the water pump 20. When the water inlet control valve 71 is opened, raw water can flow into the water purifier; when the water inlet control valve 71 is closed, the raw water is cut off. The water inlet control valve 71 is arranged on the side of the water outlet of the preposed filter element 10, so that large particle impurities in the raw water can be prevented from corroding or blocking the water inlet control valve 71. The water intake control valve 71 may be an electromagnetic valve that is controlled by a controller of the water purifier.

In some embodiments, as shown in fig. 1, the water purifier of the embodiment of the present invention may further include: a purified water interface 84, a high pressure switch 75 and a faucet 60.

The purified water outlet of the reverse osmosis filter element 30 is connected with the purified water connector 84, the purified water connector 84 is connected with the water tap 60, and the high-pressure switch 75 can be arranged on a pipeline between the purified water outlet of the reverse osmosis filter element 30 and the purified water connector 84.

When the faucet 60 is turned on, the high pressure switch 75 is triggered, and the water filtered by the front filter element 10 and the reverse osmosis filter element 30 (pure water in normal use) flows out of the faucet 60.

In some embodiments, as shown in fig. 1, the water purifier of the embodiment of the present invention may further include: waste valve 76, waste valve 76 is connected to the waste port of reverse osmosis cartridge 30. The waste valve 76 is installed between the waste port of the reverse osmosis cartridge 30 and the concentrate port 83 of the water purifier.

The purified water filtered by the reverse osmosis filter element 30 flows out from the purified water port of the reverse osmosis filter element 30, and the concentrated water (waste water) flows out from the waste water port of the reverse osmosis filter element 30, the waste water valve 76 and the concentrated water port 83 in sequence.

The waste valve 76 has a first operating condition and a second operating condition having an opening greater than the first operating condition. In other words, the opening of the waste valve 76 in the first operating state is smaller than the opening of the waste valve 76 in the second operating state. The waste valve 76 is switched between the first operation state and the second operation state according to the flow rate of the concentrate. When the flow rate of the concentrate water is small, the waste valve 76 is in the first operation state; when the flow rate of the concentrate is large, the waste water valve 76 is in the second operation state.

In some embodiments, the water purifier has a cleaning operation state and a rinsing operation state; in the cleaning mode of operation, the water pump 20 is off and the waste valve 76 is in the first mode of operation; in the flushing mode of operation, the water pump 20 is on and the waste valve 76 is in the second mode of operation.

It will be appreciated that when a new pre-filter cartridge 10 (with cleaning agent) is installed in the purifier, the cleaning function is activated and in the cleaning mode, the water pump 20 is closed and the waste valve 76 is in the first mode of operation, so that the water flow rate of the purifier is small, allowing the cleaning agent to react with the impurities deposited on the reverse osmosis filter cartridge 30 for a relatively long time, and the flow rate of the concentrate is small. The cleaning operation may last for a set time, which may be 10 minutes to 20 minutes, such as 15 minutes.

After the cleaning operation is completed, the water purifier enters the flushing operation, the water pump 20 is turned on, and the waste water valve 76 is in the second operation, so that the water flow rate of the water purifier is large, some attached impurities can be flushed away, and the flow rate of the concentrated water is large at this time. The flushing operation may last for a set time, which may be 10 minutes to 20 minutes, such as 15 minutes.

Of course, if the water purifier has the water intake control valve 71, the water intake control valve 71 is opened in both the washing operation state and the rinsing operation state.

The tap 60 may also be opened in the cleaning and flushing operation, it being noted that the water discharged from the tap 60 in the cleaning and flushing operation may contain a certain amount of cleaning agent, is not recommended for use, or is used only for flushing a toilet.

In other embodiments, as shown in fig. 2 to 4, a water purifier according to an embodiment of the present invention includes: the filter comprises a front filter element 10, a water pump 20, a reverse osmosis filter element 30, a rear filter element 40 and a water return pipe 50.

Wherein, the water inlet of leading filter core 10 can connect raw water interface 81, raw water interface 81 can connect raw water pipe, for example raw water pipe can be water pipe, the water inlet of water pump 20 links to each other with the delivery port of leading filter core 10, the delivery port of water pump 20 links to each other with the water inlet of reverse osmosis filter core 30, the water inlet of rearmounted filter core 40 links to each other with the water purification export of reverse osmosis filter core 30, the first end of wet return 50 links to each other with the delivery port of rearmounted filter core 40, the second end of wet return 50 links to each other with the water inlet of water pump 20, the delivery port of rearmounted filter core 40 links to each.

The rear filter element 40 is used for absorbing peculiar smell and residual chlorine, can be used for improving the taste of purified water, and the rear filter element 40 can be an active carbon filter element.

The rear filter element 40 is provided with a cleaning agent, and the water inlet of the rear filter element 40 is connected with the purified water outlet of the reverse osmosis filter element 30. The cleaning agent can be integrated into the rear filter element 40 during manufacture of the rear filter element 40, or can be added to the rear filter element 40 when cleaning of the reverse osmosis filter element 30 is desired.

When the front filter element 10 and the rear filter element 40 with the cleaning agent are installed in the water purifier, raw water enters the front filter element 10, the cleaning agent in the front filter element 10 is taken away by the raw water as a solvent, water dissolved with the cleaning agent enters the reverse osmosis filter element 30, the water can react with deposited impurities on the reverse osmosis filter element 30, sewage obtained after reaction can be discharged from a waste water outlet of the reverse osmosis filter element 30, or is discharged through the water faucet 60 through a water purifying outlet of the reverse osmosis filter element 30, and the water pump 20 can be selectively opened in the cleaning process, or is kept normally open.

After the primary cleaning is realized by using the cleaning agent of the front filter element 10, the secondary cleaning is realized by using the cleaning agent of the rear filter element 40.

Raw water enters the front filter element 10, is primarily filtered by the front filter element 10, and permeates the reverse osmosis filter element 30 under the pressurization effect of the water pump 20, so that impurities such as dissolved salts, colloid, microorganisms and organic matters in the water are filtered, purified water is obtained, the purified water enters the rear filter element 40 and is taken away as a solvent by the cleaning agent in the rear filter element 40, the water dissolved with the cleaning agent passes through the water return pipe 50, the water pump 20 enters the reverse osmosis filter element 30 and reacts with the deposited impurities on the reverse osmosis filter element 30, the sewage obtained after the reaction can be discharged from a waste water outlet of the reverse osmosis filter element 30, and the water pump 20 is kept normally open in the cleaning process.

After the cleaning, the raw water enters the front filter element 10, passes through the primary filtration of the front filter element 10, passes through the reverse osmosis filter element 30 under the pressurization effect of the water pump 20, filters out impurities such as dissolved salts, colloid, microorganisms, organic matters and the like in the water to obtain purified water, and the purified water enters the rear filter element 40, is filtered again and then flows to the faucet 60 through the purified water interface 84.

It can be understood that the front filter element 10 and the rear filter element 40 have a rated service life, and the rated service life is usually shorter than that of the reverse osmosis filter element 30, when the front filter element 10 and the rear filter element 40 reach the rated service life, the front filter element 10 and the rear filter element 40 need to be replaced, so that when the water purifier replaces the front filter element 10 and the rear filter element 40, because the front filter element 10 and the rear filter element 40 have cleaning agents, the cleaning agents in the front filter element 10 and the rear filter element 40 can be used to clean the reverse osmosis filter element 30, i.e. the expensive reverse osmosis filter element 30 does not need to be replaced, and after the cleaning is completed, the cleaning agents in the front filter element 10 and the rear filter element 40 are consumed, i.e. the front filter element 10 and the rear filter element 40 are changed into the common front filter element 10 and the rear filter element 40, so as to realize the normal filtering function, without affecting the normal filtering of.

In other words, in the related art, when the filter element of the water purifier is replaced, the front filter element 10, the rear filter element 40 and the reverse osmosis filter element 30 need to be replaced, and since the reverse osmosis filter element 30 is expensive, the actual use cost of the water purifier is high; the utility model discloses the water purifier only needs the lower leading filter core 10 of replacement price and rearmounted filter core 40 when the filter core of change water purifier, utilizes the cleaner in leading filter core 10 and the rearmounted filter core 40 to realize the washing to reverse osmosis filter core 30, and the cleaning process need not to dismantle reverse osmosis filter core 30, reduces the in-service use cost of water purifier by a wide margin.

According to the utility model discloses water purifier has leading filter core 10 and the rearmounted filter core 40 of sanitizer through the setting, can realize the washing to reverse osmosis filter core 30, need not to dismantle or change reverse osmosis filter core 30, can effectively reduce the use cost of water purifier.

In some embodiments, the cleaning agent in the front cartridge 10 is acidic, such as citric acid, and the cleaning agent in the rear cartridge 40 is basic, such as sodium carbonate. Thus, by providing the cleaning agent having two properties, grease, organic matter, colloid, bacterial debris and inorganic salts deposited in the reverse osmosis filter element 30 can be sufficiently removed.

In other embodiments, the cleaning agent in pre-filter element 10 is alkaline, such as sodium carbonate, and the cleaning agent in post-filter element 40 is acidic, such as citric acid. Thus, by providing the cleaning agent having two properties, grease, organic matter, colloid or bacteria debris, inorganic salt deposits deposited in the reverse osmosis filter element 30 can be sufficiently removed.

Further, the cleaning agent in the front filter element 10 is alkaline, and the cleaning agent in the rear filter element 40 is acidic, so that the cleaning process is performed with alkaline cleaning, grease, organic matters, colloid or bacteria remains on the surface of impurities can be removed, inorganic salt deposits below the impurities are exposed, and the exposed inorganic salt deposits can be removed efficiently during acid cleaning.

In some embodiments, as shown in fig. 2 to 4, the water purifier according to the embodiment of the present invention may further include: the domestic water connector 82 is connected with the water outlet of the front filter element 10 through a pipeline, and the connection position of the pipeline is located between the water outlet of the front filter element 10 and the water inlet of the water pump 20. The raw water can meet the domestic application after being primarily filtered by the preposed filter element 10, and the outlet water at the domestic water interface 82 is used for domestic water, such as washing clothes, bathing, washing vegetables and the like.

In some embodiments, as shown in fig. 2 to 4, the water purifier according to the embodiment of the present invention may further include: and the water inlet control valve 71, wherein the water inlet control valve 71 can be arranged on a pipeline between the water outlet of the prepositive filter element 10 and the water inlet of the water pump 20. When the water inlet control valve 71 is opened, raw water can flow into the water purifier; when the water inlet control valve 71 is closed, the raw water is cut off. The water inlet control valve 71 is arranged on the side of the water outlet of the preposed filter element 10, so that large particle impurities in the raw water can be prevented from corroding or blocking the water inlet control valve 71. The water intake control valve 71 may be an electromagnetic valve that is controlled by a controller of the water purifier.

In some embodiments, as shown in fig. 2 to 4, the water purifier according to the embodiment of the present invention may further include: the first end of the high-pressure switch 75 is connected with the water outlet of the rear filter element 40, and the first end of the water return pipe 50 is connected with the second end of the high-pressure switch 75 and is connected with the water outlet of the rear filter element 40 through the high-pressure switch 75.

The second end of the high-pressure switch 75 is also connected to a purified water port 84 of the water purifier, and the purified water port 84 is connected to the water tap 60. When the faucet 60 is turned on, the high pressure switch 75 is triggered, and the water (pure water in normal use) filtered by the front filter element 10, the reverse osmosis filter element 30 and the rear filter element 40 flows out of the faucet 60.

In some embodiments, as shown in fig. 2-4, a first check valve 72 is disposed between the clean water outlet of the reverse osmosis filter element 30 and the water inlet of the rear filter element 40, and the first check valve 72 is in one-way communication from the reverse osmosis filter element 30 to the rear filter element 40. The first check valve 72 mainly plays a role in keeping water flow in a single direction and maintaining pressure, so that the rear end of the first check valve 72 always has a single-direction pressure, thereby ensuring that water in the rear filter element 40 cannot flow backwards to enter the reverse osmosis filter element 30 under the conditions of water cut off and the like.

In some embodiments, as shown in fig. 2-4, the water return pipe 50 is provided with a second check valve 73, and the second check valve 73 is communicated with the water pump 20 from the rear filter element 40 in a single direction. The second check valve 73 mainly plays a role in keeping water flow flowing in a single direction and maintaining pressure, so that the rear end of the second check valve 73 always has a single-direction pressure, thereby ensuring that raw water cannot directly enter the water outlet of the rear filter element 40 through the water return pipe 50.

In some embodiments, as shown in FIGS. 2-4, the return pipe 50 is provided with a return control valve 74. The return water control valve 74 may be a solenoid valve that is controlled by the controller of the water purifier.

In some embodiments, as shown in fig. 2 to 4, the water purifier according to the embodiment of the present invention may further include: waste valve 76, waste valve 76 is connected to the waste port of reverse osmosis cartridge 30. The waste valve 76 is installed between the waste port of the reverse osmosis cartridge 30 and the concentrate port 83 of the water purifier.

The waste valve 76 has a first operating condition and a second operating condition having an opening greater than the first operating condition. In other words, the opening of the waste valve 76 in the first operating state is smaller than the opening of the waste valve 76 in the second operating state. The waste valve 76 is switchable between a second one of the first operating states depending on the flow rate of the concentrate. When the flow rate of the concentrate water is small, the waste valve 76 is in the first operation state; when the flow rate of the concentrate is large, the waste water valve 76 is in the second operation state.

In some embodiments, as shown in fig. 5, the water purifier has a first washing operation state, a second washing operation state, and a second washing operation state.

As shown in fig. 5, in the first washing operation state, the water pump 20 is turned off, the back water control valve 74 is turned off, and the waste water valve 76 is in the first operation state; in the first flush operating state, the water pump 20 is on, the return control valve 74 is off, and the waste valve 76 is in the second operating state.

It is understood that when a new front filter element 10 (with cleaning agent) and rear filter element 40 (with cleaning agent) are attached to the water purifier, the cleaning function is turned on (e.g., a cleaning/regeneration button is clicked), and the following description will be given taking an example in which the cleaning agent in front filter element 10 is alkaline and the cleaning agent in rear filter element 40 is acidic.

Arrows in fig. 2 show the water flow paths of the water purifier in the first washing operation state and the first rinsing operation state.

In the first cleaning mode, the water pump 20 is closed and the waste valve 76 is in the first mode, so that the water flow rate of the purifier is low, so that the alkaline cleaner reacts with the organic matter deposited on the reverse osmosis filter element 30 for a relatively long time, and the flow rate of the concentrated water is low. The first cleaning operation state may last for a set time, which may be 10 minutes to 20 minutes, such as 15 minutes.

After the first cleaning operation state is finished, the water purifier enters the first washing operation state, the water pump 20 is started, and the waste water valve 76 is in the second operation state, so that the water flow of the water purifier is large, some attached impurities can be washed away, and the flow of concentrated water is large at the moment. The first flushing mode may last for a set time, which may be 10 minutes to 20 minutes, such as 15 minutes.

Of course, if the water purifier has the water intake control valve 71, the water intake control valve 71 is opened in both the first cleaning operation state and the first flushing operation state.

It is also possible to open the tap 60 in the first cleaning operation state and the first flushing operation state, it being noted that the water discharged from the tap 60 in the first cleaning operation state and the first flushing operation state may contain a certain amount of alkaline cleaner, which is not recommended for use, or may be used only for flushing a toilet.

As shown in fig. 5, in the second washing operation state, the water pump 20 is turned on, the return control valve 74 is turned on, and the waste water valve 76 is in the first operation state; in the second flush operating state, the water pump 20 is on, the return control valve 74 is on, and the waste valve 76 is in the second operating state.

Arrows in fig. 3 show the water flow paths of the water purifier in the second washing operation state and the second rinsing operation state.

In the second cleaning operation state, the water pump 20 is turned on, the return control valve 74 is turned on, and the waste water valve 76 is in the first operation state, and the dissolved acidic cleaning agent is taken back to the front side of the reverse osmosis filter element 30 through the return pipe 50 by using the purified water filtered by the front filter element 10 and the reverse osmosis filter element 30 as a solvent. The second cleaning operation state may last for a set time, which may be 15 minutes to 30 minutes, such as 20 minutes.

After the second washing operation state is finished, the water purifier enters the second washing operation state, the water pump 20 is turned on, the return water control valve 74 is turned on, and the waste water valve 76 is in the second operation state, so that the water flow rate of the water purifier is large, some attached impurities can be washed away, and the flow rate of the concentrated water is large at this time. The second flushing mode may last for a set time, which may be 5 minutes to 15 minutes, such as 10 minutes.

Of course, if the water purifier has the water intake control valve 71, the water intake control valve 71 is opened in both the second cleaning operation state and the second flushing operation state.

In the second cleaning operation state and the second flushing operation state, the water tap 60 may also be opened, it being noted that in the second cleaning operation state and the second flushing operation state the water discharged from the water tap 60 may contain a certain amount of alkaline cleaning agent, which is not recommended for use, or may be used only for flushing a toilet.

Arrows in fig. 4 show the flow path of water when the water purifier is in a normal water purification state.

As shown in fig. 2 to 4, a water purifier according to an embodiment of the present invention includes: the filter comprises a front filter element 10, a water pump 20, a reverse osmosis filter element 30, a rear filter element 40 and a water return pipe 50.

Wherein, the water inlet of the front filter element 10 can be connected with a raw water interface 81, the raw water interface 81 can be connected with a raw water pipe, the water inlet of the water pump 20 is connected with the water outlet of the front filter element 10, a water inlet control valve 71 is arranged between the water inlet of the water pump 20 and the water outlet of the front filter element 10, the water outlet of the water pump 20 is connected with the water inlet of the reverse osmosis filter element 30, the water inlet of the rear filter element 40 is connected with the purified water outlet of the reverse osmosis filter element 30, a first check valve 72 is arranged between the purified water outlet of the reverse osmosis filter element 30 and the water inlet of the rear filter element 40, the first check valve 72 is communicated from the reverse osmosis filter element 30 to the rear filter element 40 in one way, the first end of the high-pressure switch 75 is connected with the water outlet of the rear filter element 40, the first end of the water return pipe 50 is connected with the second, a second end of the return pipe 50 is connected to an inlet of the water pump 20. The water outlet of the front filter element 10 is connected with a domestic water connector 82 through a pipeline. The return pipe 50 is provided with a return control valve 74, a waste water valve 76 is connected to a waste water port of the reverse osmosis cartridge 30, and the waste water valve 76 has a first operating state and a second operating state having an opening degree greater than the first operating state. The front filter element 10 has an alkaline cleaner and the rear filter element 40 has an acidic cleaner.

The water purifier has a first cleaning working state, a first washing working state, a second cleaning working state and a second washing working state; in the first washing operation state, the water pump 20 is turned off, the back water control valve 74 is turned off, and the waste water valve 76 is in the first operation state; in the first flushing operating state, the water pump 20 is turned on, the return control valve 74 is closed, and the waste valve 76 is in the second operating state; in the second washing operation state, the water pump 20 is turned on, the return water control valve 74 is turned on, and the waste water valve 76 is in the first operation state; in the second flush operating state, the water pump 20 is on, the return control valve 74 is on, and the waste valve 76 is in the second operating state.

According to the utility model discloses water purifier has leading filter core 10 and the rearmounted filter core 40 of sanitizer through the setting, can realize the acid-base washing to reverse osmosis filter core 30, need not to dismantle or change reverse osmosis filter core 30, can effectively reduce the use cost of water purifier.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

The above embodiments are merely illustrative, and not restrictive, of the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of the technical solutions should be covered by the scope of the claims of the present invention.

Claims

1. A water purifier, characterized by comprising:

a pre-filter element having a cleaning agent;

the water pump is used for driving water to flow from the water inlet of the front filter element to the water outlet of the reverse osmosis filter element.

2. The water purifier according to claim 1, further comprising:

the rear filter element is provided with a cleaning agent, and a water inlet of the rear filter element is connected with a purified water outlet of the reverse osmosis filter element;

the first end of wet return with the delivery port of rearmounted filter core links to each other, the water inlet of water pump with the delivery port of leading filter core links to each other, the water inlet of reverse osmosis filter core with the delivery port of water pump links to each other, the second end of wet return with the water inlet of water pump links to each other.

3. The water purifier of claim 2, wherein one of the cleaning agent in the pre-filter element and the cleaning agent in the post-filter element is alkaline, and the other is acidic.

4. The water purifier according to claim 2, further comprising:

and the water return pipe is connected with the water outlet of the rear filter element through the high-voltage switch.

5. The water purifier according to claim 2, wherein a first one-way valve is arranged between the purified water outlet of the reverse osmosis filter element and the water inlet of the post-filter element, and the first one-way valve is communicated with the post-filter element from the reverse osmosis filter element in a one-way manner;

the water return pipe is provided with a second one-way valve, and the second one-way valve is communicated with the water pump in a one-way mode from the rear filter element.

6. The water purifier as claimed in claim 2, wherein the return pipe is provided with a return control valve.

7. The water purifier according to any one of claims 1 to 5, further comprising:

the waste water valve is connected with a waste water port of the reverse osmosis filter element and has a first working state and a second working state with the opening degree larger than the first working state.

8. The water purifier as recited in claim 7, wherein the water purifier has a washing operation state and a rinsing operation state;

in the cleaning working state, the water pump is closed, and the waste water valve is in a first working state;

in the flushing working state, the water pump is started, and the waste water valve is in a second working state.

9. The water purifier according to claim 6, further comprising:

10. The water purifier of claim 9, wherein the water purifier has a first cleaning operation state, a first washing operation state, a second cleaning operation state, and a second washing operation state;

in the first cleaning working state, the water pump is closed, the water return control valve is closed, and the waste water valve is in a first working state;

in the first flushing working state, the water pump is started, the water return control valve is closed, and the waste water valve is in a second working state;

in the second cleaning working state, the water pump is started, the backwater control valve is started, and the wastewater valve is in the first working state;

in the second flushing working state, the water pump is started, the backwater control valve is started, and the waste water valve is in the second working state.