CN112915792A

CN112915792A - Filter element device, water purifier and operation method of water purifier

Info

Publication number: CN112915792A
Application number: CN202110092781.1A
Authority: CN
Inventors: 任富佳; 刘建保; 陈凯; 胡进华; 张开川; 郁明跃; 周海昕
Original assignee: Hangzhou Robam Appliances Co Ltd
Current assignee: Hangzhou Robam Appliances Co Ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-06-08

Abstract

The invention provides a filter element device, a water purifier and an operation method of the water purifier, and relates to the technical field of water purifiers, wherein the filter element device comprises a filter element end cover, a filter element cylinder and a movable end cover for installing a filter element; the filter element end cover is sealed and arranged on the filter element cylinder, the filter element end cover is provided with a water inlet and a water outlet, and the filter element cylinder is provided with a water outlet; the movable end cover is arranged in the filter element cylinder body, is in seal rotation and movable connection with the filter element end cover and is communicated with the water outlet. The technical problem of cleaning the ultrafiltration membrane on the water purifier is solved by the invention.

Description

Filter element device, water purifier and operation method of water purifier

Technical Field

The invention relates to the technical field of water purifiers, in particular to a filter element device, a water purifier and an operation method of the water purifier.

Background

Water pollution is a great pollution source in current environmental pollution, and the water purifier as a device capable of providing safe drinking water for daily life of people has important significance for family life of people. The water purifier generally finishes the water purification work by a filter element, and the filter element of the current mainstream comprises an ultrafiltration membrane which can effectively remove impurities such as suspended matters, colloids, microorganisms, macromolecular organic matters and the like in water. But as impurities gradually accumulate on the membrane surface, the ultrafiltration membrane is polluted and blocked. Therefore, the ultrafiltration membrane needs to be cleaned to prolong its service life, or replaced frequently.

Disclosure of Invention

The invention aims to provide a filter element device, a water purifier and an operation method of the water purifier, so as to relieve the technical problem of cleaning an ultrafiltration membrane on the water purifier.

The invention provides a filter element device in a first aspect, which comprises a filter element end cover, a filter element cylinder and a movable end cover for installing a filter element; the filter element end cover is sealed and arranged on the filter element cylinder, the filter element end cover is provided with a water inlet and a water outlet, and the filter element cylinder is provided with a water outlet; the movable end cover is arranged in the filter element cylinder body, is in seal rotation and movable connection with the filter element end cover and is communicated with the water outlet.

Further, the filter element end cover comprises a connecting sleeve extending towards the direction of the filter element cylinder body; the movable end cover comprises a sealing seat, the sealing seat is coaxially and hermetically sleeved with the connecting sleeve, and the outer diameter of the sealing seat is equal to the inner diameter of the connecting sleeve.

Furthermore, a rotating track is arranged in the connecting sleeve along the direction close to or far away from the filter element cylinder; the movable end cover also comprises a first cylinder piece, the first cylinder piece is coaxially connected with the sealing seat end to end, and the outer diameter of the first cylinder piece is smaller than that of the sealing seat; the first barrel part is provided with a guide post which is connected with the rotating track in a sliding way.

Furthermore, the filter element end cover also comprises a rotary track installation cylinder coaxially arranged in the connecting sleeve, and the rotary track is arranged on the cylinder wall of the rotary track installation cylinder.

Furthermore, the guide posts are three and are respectively arranged on the outer wall of the first cylinder.

Furthermore, the movable end cover also comprises a supporting pipeline coaxially arranged in the first cylinder part; the sealing seat is provided with a plurality of filter element holes for connecting the filter elements; one end of the supporting pipeline is communicated with the water outlet, and the other end of the supporting pipeline is communicated with the filter element hole.

Further, the filter element device further comprises a spring sleeved on the supporting pipeline, one end of the spring is abutted to the filter element end cover, and the other end of the spring is abutted to the sealing seat.

Furthermore, the movable end cover further comprises a second cylinder part, the second cylinder part is coaxially connected with one side of the sealing seat, which is away from the first cylinder part, end to end, and the outer diameter of the second cylinder part is smaller than that of the sealing seat.

Furthermore, the movable end cover further comprises a third cylinder part, one side of the third cylinder part, which is far away from the sealing seat, of the second cylinder part is coaxially connected end to end, and the outer diameter of the third cylinder part is larger than that of the second cylinder part.

Furthermore, the first cylinder, the sealing seat, the second cylinder and the third cylinder are integrally formed.

Furthermore, a sealing ring is arranged between the connecting sleeve and the sealing seat.

The invention provides a water purifier, which comprises a water outlet electromagnetic valve, a controller, a flowmeter and the filter element device; the water outlet electromagnetic valve is connected with the water outlet of the filter element device and is connected with the flowmeter; the controller is respectively electrically connected with the flowmeter and the water outlet electromagnetic valve, the controller is used for acquiring the accumulated flow of water counted by the flowmeter, and when the accumulated flow is greater than a flow set value, the controller controls the water outlet electromagnetic valve to be closed.

Further, the water purifier also comprises a pressure sensor and a water discharge electromagnetic valve; the pressure sensor is arranged in the filter element end cover so as to detect the pressure of the movable end cover extruding the filter element end cover under the water pressure; the water discharge electromagnetic valve is connected with a water discharge port of the filter element device; the controller is respectively electrically connected with the pressure sensor and the drainage electromagnetic valve, and the controller is used for obtaining the pressure value detected by the pressure sensor, and when the pressure value is greater than the preset pressure value of the system, the controller controls the drainage electromagnetic valve to be opened.

A third aspect of the present invention provides a method of operating a water purifier, wherein when the water purifier is in a water purification state, a water outlet solenoid valve is in an open state; the method is applied to the water purifier; the controller acquires the accumulated flow of the water recorded by the flowmeter; when the accumulated flow is larger than the flow set value, the controller controls the water outlet electromagnetic valve to be closed.

Further, when the water purifier is in a water purification state, the water discharge electromagnetic valve is in a closed state;

the method further comprises the following steps: the controller obtains the pressure value that pressure sensor detected, and when the pressure value was greater than the system and predetermines the pressure value, the controller control drainage solenoid valve opened.

The water purifier also comprises a water inlet electromagnetic valve connected with the water inlet, the water inlet electromagnetic valve is electrically connected with the controller, and when the water purifier is in a water purifying state, the water inlet electromagnetic valve is in an open state; the method further comprises the following steps: when the pressure value is larger than the preset pressure value of the system, the controller controls the drainage electromagnetic valve to be opened and controls the water inlet electromagnetic valve to be closed.

Further, the method further comprises: the controller is used for timing the opening time of the drainage electromagnetic valve when the drainage electromagnetic valve is opened, and controlling the drainage electromagnetic valve to be closed and the water inlet electromagnetic valve to be opened when the opening time of the drainage electromagnetic valve is larger than first preset time so as to enable the water purifier to execute the cleaning process.

Further, the method further comprises: the controller obtains the opening times of the drainage electromagnetic valve, and when the opening times of the drainage electromagnetic valve obtained by the controller is larger than the set times, the controller closes the drainage electromagnetic valve and opens the water outlet electromagnetic valve and the water inlet electromagnetic valve.

Further, a self-cleaning period is set from the closing of the water outlet electromagnetic valve to the opening of the water outlet electromagnetic valve; the method further comprises the following steps: the controller counts whether the accumulated time for closing the water outlet electromagnetic valve reaches a second preset time or not, and if so, the controller acquires an average pressure value detected by the pressure sensor in a self-cleaning period; when the average pressure value is smaller than the preset ratio of the maximum set pressure value, prompting the replacement of the filter element; when the average pressure value is larger than the preset ratio of the maximum set pressure value, the controller repeatedly obtains the average pressure value detected by the pressure sensor in a self-cleaning period every third preset time, and judges whether the average pressure value is smaller than the preset ratio of the maximum set pressure value or not so as to determine whether the filter element needs to be replaced or not.

The invention provides a filter element device, a water purifier and a running method of the water purifier, which have the beneficial effects that:

the invention provides a filter element device, which comprises a filter element end cover, a filter element cylinder and a movable end cover for installing a filter element, wherein the movable end cover is arranged on the filter element cylinder; the filter element end cover is sealed and arranged on the filter element cylinder, the filter element end cover is provided with a water inlet and a water outlet, and the filter element cylinder is provided with a water outlet; the movable end cover is arranged in the filter element cylinder body, is in seal rotation and movable connection with the filter element end cover and is communicated with the water outlet.

According to the invention, the movable end cover is in sealed rotary movable connection with the filter element end cover, the movable end cover can rotate to approach or depart from the filter element end cover under water pressure to drive the filter element to rotate, the filter element can bend in the process of rotating and moving, pollutants blocked on the surface of the filter element membrane can gradually separate from the membrane surface along with the process of bending and rotating and moving, and the pollutants and water are discharged out of the filter element cylinder body.

The invention also provides a water purifier and an operation method of the water purifier, which have all the technical characteristics of the filter element device, and therefore, the water purifier also has the technical effects.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a filter cartridge device provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a movable end cap in a filter cartridge device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a filter element end cap in the filter element device according to the embodiment of the present invention;

FIG. 4 is a cross-sectional view of a removable end cap of a filter cartridge assembly in contact with a pressure sensor according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a water purifier (without a water inlet solenoid valve) according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a water purifier (with a water inlet solenoid valve) according to an embodiment of the present invention;

fig. 7 is a schematic workflow diagram of an operation method of a water purifier according to an embodiment of the present invention.

Icon: 100-a cartridge end cap; 110-a water inlet; 120-water outlet; 130-a connecting sleeve; 140-a rotating track; 150-a rotating track mounting cylinder; 200-a cartridge body; 210-a drain opening; 300-a filter element; 400-a movable end cap; 410-a sealing seat; 420-a first cartridge; 430-a guide post; 440-supporting a conduit; 450-a second cartridge; 460-a third cartridge; 500-a spring; 600-sealing ring; 1-water outlet electromagnetic valve; 2-a controller; 3-a flow meter; 4-a filter element device; 5-a pressure sensor; 6-a water discharge electromagnetic valve; 7-water inlet electromagnetic valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally laid out when products of the present invention are used, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

The current industrial cleaning technology for the ultrafiltration membrane mainly comprises chemical cleaning and physical cleaning. The chemical cleaning achieves the cleaning effect by chemical reaction between the chemical agent soaking and the dirt on the membrane, the cleaning mode has complex procedures and needs supporting facilities, and the chemical agent is easy to cause secondary pollution and is difficult to be applied to the household water purifier. The physical cleaning is realized by washing pollutants attached to the membrane in a forward or reverse direction to enable the pollutants to fall off to achieve a cleaning effect, but the cleaning effect is poor, and the recovery rate of the membrane flux after cleaning is low; physical cleaning with good cleaning effect needs to be additionally provided with an external driving device (such as an electromagnetic transmission mechanism) to drive the filter element to reciprocate, but the external driving device has a complex structure, occupies space and increases cost.

Based on the above, the embodiment of the invention provides a filter element device, a water purifier and an operation method of the water purifier, so as to relieve the technical problem of cleaning of an ultrafiltration membrane on the water purifier.

An embodiment of the present invention provides a filter element device, as shown in fig. 1, including a filter element end cover 100, a filter element cylinder 200, and a movable end cover 400 for installing a filter element 300; the filter element end cover 100 is provided with a water inlet 110 and a water outlet 120, and the filter element cylinder 200 is provided with a water outlet 210; the movable end cap 400 is arranged in the filter element cylinder body 200, and the movable end cap 400 is in seal rotation movable connection with the filter element end cap 100 and is communicated with the water outlet 120.

According to the embodiment of the invention, as the movable end cover 400 is in sealed, rotating and movable connection with the filter element end cover 100, the movable end cover 400 can rotate to approach or depart from the filter element end cover 100 under the water pressure to drive the filter element 300 to rotate and move, the filter element 300 can bend in the rotating and moving process, and pollutants blocked on the membrane surface of the filter element 300 can gradually separate from the membrane surface along with the bending, rotating and moving process and are discharged out of the filter element cylinder body 200 together with water. Specifically, when the water inlet 110 is opened and the water outlet 120 and the water outlet 210 are closed, the water pressure in the filter cartridge body 200 increases, the movable end cap 400 rotates to approach the filter cartridge end cap 100 under the water pressure to drive the filter cartridge 300 to rotate, the filter cartridge 300 bends during the rotation, and the pollutants blocked on the membrane surface of the filter cartridge 300 gradually separate from the membrane surface along with the process of the bending rotation. Then, the water outlet 120 is continuously kept closed, the water outlet 210 is opened, the water pressure in the filter element cylinder body 200 is reduced, the movable end cover 400 rotates away from the filter element end cover 100 under the water pressure to drive the filter element 300 to rotate and move, the filter element 300 bends reversely in the rotating and moving process and finally becomes a flat state, and pollutants blocked on the membrane surface of the filter element 300 gradually separate from the membrane surface along with the process of bending and reversely rotating and moving; these contaminants are then drained from the drain opening 210 with the water.

It should be noted that, the filter element end cap 100 and the filter element cylinder 200 are connected by screw threads, and together form a space for installing the filter element 300 for water purification. In order to seal the filter element end cap 100 and the filter element cylinder 200, a seal ring 600 is provided between the filter element end cap 100 and the filter element cylinder 200.

It should be noted that the filter element 300 may be an ultrafiltration membrane, or may be another flexible filter membrane that can move with the rotation of the movable end cap 400.

In this embodiment, as shown in fig. 3, cartridge end cap 100 includes a coupling sleeve 130 extending in a direction toward cartridge barrel 200; the movable end cap 400 includes a sealing seat 410, the sealing seat 410 is coaxially and sealingly sleeved with the connecting sleeve 130, and an outer diameter of the sealing seat 410 is equal to an inner diameter of the connecting sleeve 130. Specifically, one end of the connection sleeve 130 is fixed to the filter element end cap 100 in a sealing manner, and the other end of the connection sleeve 130 is connected with the sealing seat 410 in a sealing manner.

The connection sleeve 130 can be sealingly connected to the filter cartridge end cap 100 in a variety of ways, and illustratively, the connection sleeve 130 is integrally formed with the filter cartridge end cap 100; as another example, one end of the connection sleeve 130 is sealingly connected to the filter cartridge end cap 100 by a sealing ring 600.

The connection between the connection sleeve 130 and the sealing seat 410 is various, and for example, the inner wall of the connection sleeve 130 is in interference fit with the outer wall of the sealing seat 410; as another example, the inner wall of the connection sleeve 130 is connected to the outer wall of the sealing seat 410 by a sealing ring 600; also illustratively, the outer wall of the seal holder 410 is made of rubber.

In the present embodiment, as shown in fig. 3, a rotation rail 140 is disposed inside the connection sleeve 130 in a direction approaching or departing from the filter cartridge barrel 200; the rotation track 140 may be spirally disposed on an inner wall of the connection sleeve 130, the inner wall and the outer wall are not communicated with each other due to the disposition of the rotation track 140, and may also be disposed at other positions, for example, the filter element end cover 100 further includes a rotation track mounting cylinder 150 coaxially disposed in the connection sleeve 130, and the rotation track 140 is disposed on a cylinder wall of the rotation track mounting cylinder 150. Specifically, the outer diameter of the rotary track mounting cylinder 150 is smaller than the inner diameter of the connecting sleeve 130, and the rotary track mounting cylinder 150 is coaxially sleeved in the connecting sleeve 130; the rotating rail 140 is spirally formed on the wall of the rotating rail mounting cylinder 150, and may be an inner wall or a rail in which the inner wall communicates with the outer wall. In this embodiment, the rotational track 140 is threaded through the wall of the rotational track mounting tube 150.

As shown in fig. 2, the movable end cap 400 further includes a first barrel 420, the first barrel 420 is coaxially connected with the sealing seat 410 end to end, and the outer diameter of the first barrel 420 is smaller than that of the sealing seat 410; the first barrel member 420 is provided with a guide post 430 slidably coupled to the rotation rail 140. Specifically, the sealing seat 410 and the first barrel 420 are integrally formed, and the end surface of the sealing seat 410 extends outward coaxially out of the first barrel 420. The sealing seat 410 and the first barrel 420 may be separately connected, and one end of the first barrel 420 is hermetically fixed to the sealing seat 410.

The outer diameter of the first barrel 420 is smaller than the inner diameter of the coupling sleeve 130; when the rotary rail installation cylinder 150 is provided in the coupling sleeve 130, the outer diameter of the first cylinder member 420 is smaller than the inner diameter of the rotary rail installation cylinder 150. The first barrel member 420 is provided with a guide post 430 slidably coupled to the rotation rail 140. The guiding column 430 is installed in many positions, and for example, the guiding column 430 is disposed on the outer cylinder wall of the first cylinder 420 and is located on the outer cylinder wall of the first cylinder 420 at the end far away from the sealing seat 410. The guide posts 430 are 3 in number and are disposed at the same interval.

As shown in FIG. 2, the movable end cap 400 further includes a support conduit 440 coaxially disposed within the first barrel 420; the sealing seat 410 is provided with a plurality of filter element holes for connecting the filter element 300; one end of the support pipe 440 is communicated with the water outlet 120, and the other end is communicated with the cartridge hole. Specifically, a plurality of filter element holes are formed in the sealing seat 410 in a penetrating mode, each filter element hole is communicated with one end of one filter element 300, and the plurality of filter element holes are formed in a diffused mode. The sealing seat 410 extends outwards in a ring shape around the filter element hole, the radius of the sealing seat gradually decreases to form a funnel-shaped support member and a necking, and the necking is the same as the aperture of the support pipeline 440 and is communicated with the end part of the support pipeline 440 in a sealing way. One end of the first barrel 420 is provided at the funnel-shaped support.

In this embodiment, the filter element device further includes a spring 500 sleeved on the supporting pipe 440, one end of the spring 500 abuts against the filter element end cap 100, and the other end of the spring 500 abuts against the sealing seat 410, and as the movable end cap 400 moves upward to approach the filter element end cap 100, the spring 500 is compressed to store elastic potential energy. Specifically, the filter element end cap 100 is provided with an outlet conduit in the mounting sleeve, the outlet conduit is communicated with the water outlet 120, the outlet conduit is slidably and hermetically sleeved with the support conduit 440, and when the movable end cap 400 is close to or far away from the filter element end cap 100 under water pressure, the outlet conduit and the support conduit 440 slide to each other to shorten or lengthen the total length of the combination of the outlet conduit and the support conduit. The length of the spring 500 in its natural state is less than the sum of the lengths between the outlet conduit and the support conduit 440, i.e., when the spring 500 is in its natural state, the outlet conduit does not disengage from the support conduit 440.

As shown in fig. 2, the movable end cap 400 further includes a second cylinder 450, the second cylinder 450 is coaxially connected end to end with the side of the sealing seat 410 facing away from the first cylinder 420, and the cylinder diameter of the second cylinder 450 is smaller than that of the sealing seat 410. The second barrel 450 is adapted to sequentially collect the ends of the plurality of cartridges 300 associated with the cartridge openings in the second barrel 450. The second barrel 450 surrounds all of the cartridge openings therein.

As shown in fig. 2, the movable end cap 400 further includes a third cylinder 460, the third cylinder 460 is coaxially connected end to end with the side of the second cylinder 450 facing away from the sealing seat 410, and the outer diameter of the third cylinder 460 is larger than that of the second cylinder 450. The third barrel 460 limits the throw of the filter element 300 by a certain amount as the filter element 300 is spirally rotated. The length of the third cylinder 460 is less than the length of the second cylinder 450, and the lengths of the second cylinder 450 and the third cylinder 460 are not more than one third of the length of the filter element 300, which may reduce the cleaning effect of the filter element 300.

For better sealing connection of the first barrel 420, the seal holder 410, the second barrel 450 and the third barrel 460, the first barrel 420, the seal holder 410, the second barrel 450 and the third barrel 460 are integrally formed.

The specific structure of the filter element device has been described above, and the structure of the water purifier will be described next.

The embodiment of the invention also provides a water purifier, as shown in fig. 5 and fig. 6, comprising a water outlet electromagnetic valve 1, a controller 2, a flow meter 3 and the filter element device 4; the water outlet electromagnetic valve 1 is connected with the water outlet 120 of the filter element device 4, and the water outlet electromagnetic valve 1 is connected with the flowmeter 3; the controller 2 is respectively electrically connected with the flowmeter 3 and the water outlet electromagnetic valve 1, the controller 2 is used for obtaining the accumulated flow rate of the water counted by the flowmeter 3, and when the accumulated flow rate is larger than a flow set value, the controller 2 controls the water outlet electromagnetic valve 1 to be closed. It should be noted that the flow set value is preset by the factory. The water purifier further includes a filter element 300, and the filter element 300 is mounted on the movable end cap 400.

In this embodiment, the water purifier further includes a pressure sensor 5 and a drain solenoid valve 6; a pressure sensor 5 is arranged in the filter element end cover 100 to detect the pressure of the movable end cover 400 pressing the filter element end cover 100 under the water pressure; the water discharge electromagnetic valve 6 is connected with the water discharge port 210 of the filter element device 4; the controller 2 is respectively electrically connected with the pressure sensor 5 and the drainage electromagnetic valve 6, the controller 2 is used for obtaining a pressure value detected by the pressure sensor 5, and when the pressure value is larger than a system preset pressure value, the controller 2 controls the drainage electromagnetic valve 6 to be opened.

Specifically, as shown in fig. 4, the pressure sensor 5 is disposed at the periphery of the water outlet pipe, and faces the spring 500, and the detected pressure of the spring 500 is transmitted to the controller 2, that is, the pressure of the spring 500 is the pressure of the movable end cover 400 pressing the filter element end cover 100 under the water pressure. It should be noted that the preset pressure value of the system is preset by a factory, and the preset pressure value of the system may be the maximum pressure value provided by the spring 500, or may be another suitable pressure value smaller than the maximum pressure value. When the pressure value of the spring 500 detected by the pressure sensor 5 reaches the preset pressure value, the drain solenoid valve 6 is opened, the water inlet solenoid valve 7 is closed, and the movable end cover 400 is changed from being close to the filter element end cover 100 to being far from the filter element end cover 100.

The structure of the water purifier has been explained above, and next, how the water purifier implements a method of cleaning the filter element 300 is explained.

An embodiment of the present invention provides an operation method of a water purifier, as shown in fig. 7, when the water purifier is in a water purification state, a water outlet solenoid valve 1 is in an open state; the method is applied to the water purifier; the controller 2 acquires the accumulated flow of the water recorded by the flowmeter 3; when the accumulated flow is larger than the flow set value, the controller 2 controls the water outlet electromagnetic valve 1 to be closed. At this point, the filter element cleaning state is started.

The water inlet 110 continuously feeds water, the water pressure in the filter element cylinder body 200 is gradually increased, the movable end cover 400 gradually rotates and moves to be close to the filter element end cover 100 under the action of the water pressure, and the spring 500 is gradually compressed; as the filter element 300 moves closer to the filter element end cap 100 as the movable end cap 400 rotates, contaminants attached to the surface of the filter element 300 are gradually separated from the surface of the filter element 300.

In this embodiment, when the water purifier is in a water purification state and the purified water is drinking water, the drain solenoid valve 6 is in a closed state; the method further comprises the following steps: the controller 2 acquires a pressure value detected by the pressure sensor 5, and when the pressure value is greater than a system preset pressure value, the controller 2 controls the drainage electromagnetic valve 6 to be opened.

The water is continuously drained from the drain opening 210, the water pressure in the filter element cylinder 200 is gradually reduced, the movable end cap 400 is gradually rotated and moved away from the filter element end cap 100 under the water pressure, the filter element 300 is rotated and moved away from the filter element end cap 100 along with the movable end cap 400, and pollutants separated from the surface of the filter element 300 are drained from the drain opening 210 along with the water.

In this embodiment, the water purifier further includes a water inlet electromagnetic valve 7 connected to the water inlet 110, the water inlet electromagnetic valve 7 is electrically connected to the controller 2, and when the water purifier is in a water purification state, the water inlet electromagnetic valve 7 is in an open state; the method further comprises the following steps: when the pressure value is larger than the preset pressure value of the system, the controller 2 controls the water discharge electromagnetic valve 6 to be opened and controls the water inlet electromagnetic valve 7 to be closed. The above method has the effect of not wasting water.

In this embodiment, the method further includes: when the drainage electromagnetic valve 6 is opened, the controller 2 times the opening time of the drainage electromagnetic valve 6, and when the opening time of the drainage electromagnetic valve 6 is greater than a first preset time, the controller 2 controls the drainage electromagnetic valve 6 to be closed and controls the water inlet electromagnetic valve 7 to be opened, so that the water purifier executes a cleaning process. At this time, the filter element cleaning state of the next round is entered.

In this embodiment, the method further includes: the controller 2 acquires the opening times of the drainage electromagnetic valve 6, and when the controller 2 acquires that the opening times of the drainage electromagnetic valve 6 is larger than the set times, the controller 2 closes the drainage electromagnetic valve 6 and opens the water outlet electromagnetic valve 1 and the water inlet electromagnetic valve 7. At this time, the water enters a pure water state.

In the embodiment, a self-cleaning period is set from the closing of the water outlet electromagnetic valve 1 to the opening of the water outlet electromagnetic valve 1; the method further comprises the following steps: the controller 2 counts whether the accumulated time for closing the water outlet electromagnetic valve 1 reaches a second preset time M, if so, the controller 2 obtains an average pressure value detected by the pressure sensor 5 in a self-cleaning period, and when the average pressure value is smaller than a preset ratio of a maximum set pressure value, the filter element 300 is prompted to be replaced; when the average pressure value is greater than the preset ratio of the maximum set pressure value, the controller 2 repeatedly determines whether the average pressure value is less than the preset ratio of the maximum set pressure value every third preset time X to determine whether the filter element 300 needs to be replaced.

The working process of the operation method of the water purifier provided by the invention is described as follows:

when the water purifier is normally used, the water purifier is in a water purification state, the flow meter 3 detects the flow rate of water flowing through the flow meter 3 and inputs data to the controller 2, and when the total flow rate is greater than a flow rate set value, the filter element device 4 starts to perform a cleaning process.

When the cleaning process is executed, the water outlet solenoid valve 1 is closed, the water inlet solenoid valve 7 is opened, the water discharge solenoid valve 6 is closed, and after water enters the filter element device 4, because a sealed space is formed between the mounting sleeve and the sealing seat 410, the movable end cover 400 rotates and moves upwards along the rotating track 140 under the action of water pressure, in this case, the guide post 430 slides in the rotating track 140, and the sliding path is the track of the rotating track 140. The filter element 300 is rotated and moved upward in the same trajectory by the movable end cap 400. During this process, pressure sensor 5 continuously senses the pressure of spring 500 against cartridge end cap 100 and transmits data to controller 2; when the pressure is greater than the preset pressure value of the system, the controller 2 controls the drainage electromagnetic valve 6 to be opened, the water inlet electromagnetic valve 7 can be closed or not, and meanwhile, the water outlet electromagnetic valve 1 is kept closed continuously. In this case, the filter cartridge device 4 starts to drain, and the movable cap 400 moves downward due to the pressure relief along the rotation rail 140, and the filter cartridge 300 also moves downward.

When the controller 2 controls the drainage solenoid valve 6 to be opened, the controller 2 counts the time for opening the drainage solenoid valve 6, and when the time for opening the drainage solenoid valve 6 is greater than a first preset time, it indicates that the movable end cover 400 has completed the rotation-downward movement process, and the guide post 430 returns to the original point. The process of rotating the movable end cap 400 from the position farthest from the filter element end cap 100 upward and then rotating it downward to return to the original point is regarded as a cleaning process. At this time, the controller 2 controls the water discharge solenoid valve 6 to be closed and the water inlet solenoid valve 7 to be opened, so that the water purifier performs the next cleaning process. The controller 2 records the number of times the drain solenoid valve 6 is opened, that is, the number of times the water purifier performs the washing process, whenever the outlet solenoid valve 1 is closed. When the controller 2 obtains that the number of times of executing the cleaning process is larger than the set number of times, the water discharge electromagnetic valve 6 is closed, the water outlet electromagnetic valve 1 and the water inlet electromagnetic valve 7 are opened, and at the moment, the water purifier enters a water purification state and starts a normal working mode. And setting a self-cleaning period as the time from the closing of the water outlet electromagnetic valve 1 to the opening of the water outlet electromagnetic valve 1 when the water purifier finishes the cleaning process for the set times.

When the water purifier is in a cleaning state, the controller 2 records and accumulates the closing time of the water outlet electromagnetic valve 1, namely the time of the water purifier for cleaning. When the accumulated time of the water purifier performing the cleaning process by the controller 2 reaches the second preset time M, the controller 2 obtains an average pressure value detected by the pressure sensor 5 in a latest self-cleaning period, and when the average pressure value is smaller than a preset ratio of a maximum set pressure value, such as 1/3 of the maximum pressure value, it represents that the filter element 300 is clogged to the extent that the life of the filter element 300 cannot be recovered by self-cleaning, and at this time, the controller 2 prompts a user to replace the filter element 300; when the average pressure value is greater than the preset ratio of the maximum set pressure value, the controller 2 repeatedly determines whether the average pressure value is less than the preset ratio of the maximum set pressure value every third preset time X to determine whether the filter element 300 needs to be replaced.

Through the process, when the user uses the water purifier, the water purifier can be automatically cleaned regularly through the self-cleaning mode, and when the filter element 300 is blocked and the service life of the filter element 300 cannot be recovered through cleaning, the user can be reminded in time, and the water sanitation of the user cannot be influenced.

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 the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A filter element device is characterized by comprising a filter element end cover (100), a filter element cylinder body (200) and a movable end cover (400) for installing a filter element (300);

the filter element end cover (100) is arranged on the filter element cylinder body (200) in a sealing mode, the filter element end cover (100) is provided with a water inlet (110) and a water outlet (120), and the filter element cylinder body (200) is provided with a water outlet (210);

the movable end cover (400) is arranged in the filter element cylinder body (200), and the movable end cover (400) is in sealed rotary movable connection with the filter element end cover (100) and is communicated with the water outlet (120).

2. The filter cartridge arrangement according to claim 1, wherein the filter cartridge end cap (100) comprises a connection sleeve (130) extending in a direction towards the filter cartridge barrel (200);

the movable end cover (400) comprises a sealing seat (410), the sealing seat (410) is coaxially and hermetically sleeved with the connecting sleeve (130), and the outer diameter of the sealing seat (410) is equal to the inner diameter of the connecting sleeve (130).

3. A filter cartridge device according to claim 2, wherein a rotation track (140) is provided in the connection sleeve (130) in a direction towards or away from the filter cartridge body (200);

the movable end cover (400) further comprises a first cylinder piece (420), the first cylinder piece (420) is coaxially connected with the sealing seat (410) end to end, and the outer diameter of the first cylinder piece (420) is smaller than that of the sealing seat (410); the first barrel part (420) is provided with a guide post (430) which is in sliding connection with the rotating track (140).

4. The filter cartridge arrangement of claim 3, wherein the filter cartridge end cap (100) further comprises a rotational track mounting cylinder (150) coaxially disposed within the connector sleeve (130), the rotational track (140) opening into a cylindrical wall of the rotational track mounting cylinder (150).

5. A filter cartridge arrangement as claimed in claim 3, characterised in that the guide posts (430) are three and are each provided in the outer wall of the first cartridge (420).

6. The filter cartridge arrangement of claim 3, wherein the movable end cap (400) further comprises a support conduit (440) coaxially disposed within the first cartridge (420); the sealing seat (410) is provided with a plurality of filter element holes for connecting the filter elements (300); one end of the supporting pipeline (440) is communicated with the water outlet (120), and the other end of the supporting pipeline is communicated with the filter element hole.

7. Filter element device according to claim 6, further comprising a spring (500) fitted around the support duct (440), the spring (500) being disposed at one end against the end cap (100) and at the other end against the sealing seat (410).

8. A filter cartridge arrangement according to claim 3, wherein the movable end cap (400) further comprises a second barrel (450), the second barrel (450) being coaxially end-to-end connected to the side of the seal holder (410) facing away from the first barrel (420), the second barrel (450) having an outer diameter smaller than the outer diameter of the seal holder (410).

9. The filter cartridge device of claim 8, wherein the removable end cap (400) further comprises a third barrel (460), the third barrel (460) being coaxially connected end-to-end with the second barrel (450) on a side facing away from the seal seat (410), the third barrel (460) having an outer diameter greater than the outer diameter of the second barrel (450).

10. A filter cartridge arrangement as claimed in claim 9, wherein the first cartridge (420), the seal seat (410), the second cartridge (450) and the third cartridge (460) are provided integrally.

11. A filter cartridge arrangement according to claim 2, wherein a sealing ring (600) is arranged between the connection sleeve (130) and the sealing seat (410).

12. A water purifier, characterized by comprising a water outlet solenoid valve (1), a controller (2), a flow meter (3) and a filter element device (4) according to any one of claims 1 to 11;

the water outlet electromagnetic valve (1) is connected with a water outlet (120) of the filter element device (4), and the water outlet electromagnetic valve (1) is connected with the flowmeter (3);

the controller (2) is respectively electrically connected with the flowmeter (3) and the water outlet electromagnetic valve (1), the controller (2) is used for obtaining the accumulated flow of water counted by the flowmeter (3), and when the accumulated flow is larger than a flow set value, the controller (2) controls the water outlet electromagnetic valve (1) to be closed.

13. The water purifier according to claim 12, further comprising a pressure sensor (5) and a drain solenoid valve (6);

the pressure sensor (5) is arranged in the filter element end cover (100) to detect the pressure of the movable end cover (400) pressing the filter element end cover (100) under the water pressure;

the water discharge electromagnetic valve (6) is connected with a water discharge port (210) of the filter element device (4);

the controller (2) is respectively electrically connected with the pressure sensor (5) and the drainage electromagnetic valve (6), the controller (2) is used for acquiring a pressure value detected by the pressure sensor (5), and when the pressure value is larger than a system preset pressure value, the controller (2) controls the drainage electromagnetic valve (6) to be opened.

14. An operation method of a water purifier is characterized in that when the water purifier is in a water purification state, the water outlet electromagnetic valve (1) is in an open state;

the method is applied to the water purifier as claimed in claim 13;

the controller (2) acquires the accumulated flow rate of the water recorded by the flowmeter (3);

and when the accumulated flow is larger than the flow set value, the controller (2) controls the water outlet electromagnetic valve (1) to be closed.

15. The operation method of a water purifier according to claim 14, wherein the drain solenoid valve (6) is in a closed state when the water purifier is in a water purification state;

the method further comprises the following steps:

the controller (2) acquires a pressure value detected by the pressure sensor (5), and when the pressure value is larger than a system preset pressure value, the controller (2) controls the drainage electromagnetic valve (6) to be opened.

16. The operation method of a water purifier according to claim 15, further comprising a water inlet solenoid valve (7) connected to the water inlet (110), the water inlet solenoid valve (7) being electrically connected to the controller (2), the water inlet solenoid valve (7) being in an open state when the water purifier is in a water purifying state;

the method further comprises the following steps:

when the pressure value is larger than the preset pressure value of the system, the controller (2) controls the drainage electromagnetic valve (6) to be opened and controls the water inlet electromagnetic valve (7) to be closed.

17. The method of operating a water purifier according to claim 16, further comprising:

the controller (2) is in when drainage solenoid valve (6) are opened, it is right time that drainage solenoid valve (6) are opened, when the time that drainage solenoid valve (6) are opened is greater than first preset time, controller (2) control drainage solenoid valve (6) are closed, control intake solenoid valve (7) are opened, so that the water purifier carries out the cleaning process.

18. The method of operating a water purifier according to claim 16, further comprising:

the controller (2) obtains the opening times of the drainage electromagnetic valve (6), and when the controller (2) obtains that the opening times of the drainage electromagnetic valve (6) is larger than the set times, the controller (2) closes the drainage electromagnetic valve (6), opens the water outlet electromagnetic valve (1) and the water inlet electromagnetic valve (7).

19. The operation method of a water purifier according to claim 18, wherein a self-cleaning period is set from the closing of the water outlet solenoid valve (1) to the opening of the water outlet solenoid valve (1);

the method further comprises the following steps:

the controller (2) counts whether the accumulated time for closing the water outlet electromagnetic valve (1) reaches a second preset time or not,

if yes, the controller (2) acquires an average pressure value detected by the pressure sensor (5) in a self-cleaning period;

when the average pressure value is smaller than the preset ratio of the maximum set pressure value, the filter element (300) is prompted to be replaced;

when the average pressure value is larger than the preset ratio of the maximum set pressure value, the controller (2) repeatedly obtains the average pressure value detected by the pressure sensor (5) in a self-cleaning period every third preset time, and judges whether the average pressure value is smaller than the preset ratio of the maximum set pressure value or not so as to determine whether the filter element (300) needs to be replaced or not.