CN111921382A - Remote switching method for pre-filter liner filtering and back-flushing channel of water purifier - Google Patents

Abstract

The invention relates to the water treatment industry, in particular to the aspect of drinking water filtration. The invention discloses a remote switching method for a pre-filter liner filtering and back-flushing channel of a water purifier. A plurality of water passing electric control valves including a water inlet electric control valve for controlling the water passing of the preposed filtering channel, a backflushing water inlet electric control valve for controlling the backflushing filtering channel to pass water reversely and a water outlet electric control valve are arranged around the to-be-backflushed filtering container and connected with related water paths; a remote control terminal, an internet communication receiving device in communication with the remote control terminal and an in-line recoil control circuit for setting and starting an in-line recoil control program are also arranged; the remote control terminal outputs a control instruction signal through the internet communication receiving device to trigger the direct discharging control recoil circuit connected with the electric control device, and the electric control device starts a direct discharging recoil control program aiming at each filter container to be recoiled immediately or according to preset time: and (4) conducting the related backflushing water inlet electric control valve and the related water outlet electric control valve to carry out backflushing on each filter container to be backflushed for a certain time in sequence and discharging the backflushing filter containers out of the discharge pipeline.

Description

Remote switching method for pre-filter liner filtering and back-flushing channel of water purifier

Prior application title: automatic control switching method of electric control recoil switching device for water purifier filter element waterway

Prior application No.: 201910392597.1

Technical Field

The invention relates to the water treatment industry, in particular to the aspects of deep filtration and purification of drinking water.

Background

Chinese patents ZL200910224481.3, ZL200910246024.4, ZL200910224652.2 and ZL200910215159.4 disclose technical schemes of 'full back flushing mode' relating to all filter liners of filter channels of a water purifier. In the technical scheme of the full backflushing mode, the key characteristic is that all filter containers in the filter channel are backflushing filter containers, so that impurities flushed out by backflushing cleaning of the backflushing filter containers positioned in the front are avoided, and the impurities cannot be discharged completely due to interception of non-backflushing filter containers in the rear filter channel. As for the backflushing filter containers, all the backflushing filter containers participate when in the filtering mode; however, in the backflushing mode, only one backflushing filter cartridge is involved in each backflushing switching. However, in the above-mentioned "full backflushing mode", the requirement for the related waterway switch is very high, and each backflushing filter cartridge needs to be additionally provided with a backflushing pipeline which is respectively connected with each switching water port inside the manual waterway switch, and especially the backflushing pipeline of the filter cartridge far away from the waterway switch is longer. Under the mode that each filter element of machine filtration passageway is in non-recoil state, there is "stagnant water" in each switching mouth of water route switch inside and the recoil pipeline that each switching mouth of a river connected respectively. In view of the fact that the switching of the manual waterway switcher belongs to a manual operation movable disk and fixed disk plane sealing switching mode, the backflushing switching operation process is laborious (high friction force) and time-consuming, so that the waterway switching device is difficult to move out of the machine for one-time operation every time, even the backflushing cleaning is not carried out for several months, the waterway switching device is in the same nominal shape, and the problem of 'dead water' is also caused. Secondly, the traditional electric control waterway switching device used on the central water purifier has the defects of few control backflushing filter liners (1-2 filter layers), invisible backflushing effect, complex filter material replacement, large workload and large volume due to lack of integrated design, and is not suitable for miniaturized models. In addition, for the user group using the water purifier equipped with the waterway switcher, the problem of how to determine the better back-flushing cleaning time and interval (too short cleaning time or too long interval time has poor effect, and too long cleaning time or too short interval time has large loss) in the actual situation of the quality of the household tap water of different water networks is often encountered. The defects and shortcomings seriously affect the upgrading and updating of the water purifier.

Disclosure of Invention

The invention mainly solves the technical problem of providing a simple and practical remote switching method for the filtering and backflushing channel of the preposed filter liner of the water purifier so as to overcome the defects and shortcomings.

A remote switching method for a pre-filter liner filtering and back-flushing channel of a water purifier is characterized in that a base is provided with a water inlet pipeline, a water purifying pipeline, a discharge pipeline and an electric control device; a single filter material layer or a plurality of filter material layers are arranged on the filter liner to be backflushed as the front filter liner; the water inlet end and the water outlet end of the filter liner to be backflushed are respectively connected with a water inlet pipeline and a water purifying pipeline to form a preposed filtering channel; in addition, three water passing electric control valves including a water inlet electric control valve for controlling water inlet of the to-be-backflushed filter container, a backflush water inlet electric control valve for controlling reverse water passing of the to-be-backflushed filter container and a water outlet electric control valve are arranged around the to-be-backflushed filter container and connected with related water paths, wherein the water outlet end of the water inlet electric control valve and the water inlet end of the water outlet electric control valve positioned behind the water inlet electric control valve are communicated with the water inlet end of the to-be-backflushed filter container, and the water inlet end of the water outlet electric control valve which is connected with the water; the electric control device controls the water inlet electric control valve to be conducted and controls the backflushing water inlet electric control valve and the water outlet electric control valve to be closed to form a pre-filtering channel for forward water passing of the backflushing filter container; the electric control device controls the water inlet electric control valve to be closed and controls the backflushing water inlet electric control valve to be communicated with the water outlet electric control valve positioned in front of the to-be-backflushing filter liner at the same time, so that water is fed from the backflushing water inlet electric control valve and flows from the water outlet end of the to-be-backflushing filter liner to the water inlet end, then a backflushing channel for water is arranged at the water outlet end of the water outlet electric control valve and is additionally connected with a discharge pipeline at the water outlet end of the water outlet electric control valve, and the corresponding water passing mode is a raw water backflushing mode; the remote control terminal establishes communication with an electric control device connected with the direct discharge control recoil circuit through an internet communication receiving device and sends out a control instruction signal; the electric control device receives the control instruction signal through the internet communication receiving device, or immediately or according to preset time, triggers a connected direct-discharge control backflushing circuit to start a direct-discharge backflushing control program aiming at the filter container to be backflushed: and under the condition that the preposed filtering channel is in the to-be-operated mode, the electric control device controls the water inlet electric control valve to be closed, and conducts the backflushing water inlet electric control valve and the water outlet electric control valve to carry out reverse water cleaning on the to-be-backflushed filtering container for a fixed time and discharge the to-be-backflushed filtering container through the conducted backflushing discharge pipeline until the reverse water cleaning of the to-be-backflushed filtering container is completed and then the to-be-operated mode is automatically switched back.

A remote switching method for a pre-filter liner filtering and back-flushing channel of a water purifier is characterized in that a base is provided with a water inlet pipeline, a water purifying pipeline, a discharge pipeline and an electric control device; the multiple preposed filter liners are sequentially connected in series to form a preposed filter channel, the head end and the tail end of the preposed filter channel are respectively connected with a water inlet pipeline and a water purification pipeline, and each preposed filter liner or part or all of the preposed filter liners are filter liners to be backflushed and need to be backwashed by water for cleaning; in addition, a plurality of water passing electric control valves including a water inlet electric control valve for controlling water passing of the pre-filtering channel, a backflushing water inlet electric control valve for controlling reverse water passing of the pre-filtering channel and a water outlet electric control valve are arranged around the to-be-backflushing filtering liner in the pre-filtering channel and connected with related water ways, wherein the water outlet end of the water inlet electric control valve and the water inlet end of the water outlet electric control valve positioned behind the water inlet electric control valve are communicated with the water inlet end of the to-be-backflushing filtering liner, the water outlet end of the backflushing water inlet electric control valve, which is interconnected with the water inlet electric control valve, of the water inlet end is connected with the water outlet end of the to-be-backflushing filtering liner, and the backfl; the electric control device controls the water inlet electric control valve to be conducted and controls the backflushing water inlet electric control valve and the water outlet electric control valve to be closed to form a preposed filtering channel for forward water passing of each preposed filtering container which is connected in series; the electric control device controls the closing of the water inlet electric control valve and controls the simultaneous conduction of a backflushing water inlet electric control valve behind a filter liner to be backflushed and a water outlet electric control valve in front of the filter liner to be backflushed, so that water is fed from the backflushing water inlet electric control valve and flows from the water outlet end of the backflushing water inlet electric control valve to the water inlet end through the connected water outlet end of the filter liner to be backflushing water inlet end, then the water outlet end of the water outlet electric control valve is additionally provided with a backflushing discharge pipeline connected with the water outlet end of each water outlet electric control valve and a backflushing channel for discharging water from the discharge pipeline, and the electric control device is characterized by also being provided with a remote control terminal, an internet communication receiving device which; the remote control terminal establishes communication with an electric control device connected with the direct discharge control recoil circuit through an internet communication receiving device and sends out a control instruction signal; the electric control device receives the control instruction signal through the internet communication receiving device, or immediately or according to preset time, triggers the connected direct-discharge recoil control circuit to start a direct-discharge recoil control program for each filter container to be recoiled: under the condition that the preposed filtering channel is in a to-be-operated mode, the electric control device controls the water inlet electric control valve to be closed and conducts the related backflushing water inlet electric control valve and the related backflushing water outlet electric control valve to carry out independent reverse water washing on each to-be-backflushing filter container for a certain time length in sequence and discharge the water from the conducted discharge pipeline until the reverse water washing on each to-be-backflushing filter container is completed and then automatically switched back to the to-be-operated mode; the corresponding reverse water passing mode is a raw water backflushing mode which controls a water inlet electric control valve at the head end of the prepositive filtering channel to be closed and controls a backflushing water inlet electric control valve at a water inlet end interconnected with the water inlet electric control valve and a water outlet electric control valve between the water inlet electric control valve and a filter liner to be backflushed to be conducted simultaneously, or a filtering backflushing mode which controls a water inlet electric control valve behind the prepositive filter liner to be closed and controls a backflushing water inlet electric control valve at a water inlet end interconnected with the water inlet electric control valve and a water outlet electric control valve between the water inlet electric control valve and the filter liner to be backflushed to be conducted simultaneously.

A remote switching method for a pre-filter liner filtering and backflushing channel of a water purifier is characterized in that a base is provided with a water inlet pipeline, a pure water pipeline, a discharge pipeline and an electric control device; the device comprises a reverse osmosis membrane filter liner, a plurality of filter liners, a water inlet pipeline, a water outlet pipeline and a water outlet pipeline, wherein the filter liners are sequentially connected in series to form a filter channel, the filter liners are positioned in front of the reverse osmosis membrane filter liner to form a pre-filter channel, the head end of the pre-filter channel is connected with the water inlet pipeline, and all or part of the pre-filter liners are to-be-backflushed filter liners needing to be backwashed and; the water inlet end of the reverse osmosis membrane filter liner is connected with the tail end of the preposed filtering channel through a booster pump, the water outlet pipeline of the reverse osmosis membrane filter liner is connected with a pure water pipeline, and the concentrated water discharge pipeline of the reverse osmosis membrane filter liner is connected with a discharge pipeline through a concentrated water discharge flow control device; in addition, a plurality of water passing electric control valves including a water inlet electric control valve for controlling water passing of the pre-filtering channel, a backflushing water inlet electric control valve for controlling reverse water passing of the pre-filtering channel and a water outlet electric control valve are arranged around the to-be-backflushing filtering liner in the pre-filtering channel and connected with related water ways, wherein the water outlet end of the water inlet electric control valve and the water inlet end of the water outlet electric control valve positioned behind the water inlet electric control valve are communicated with the water inlet end of the to-be-backflushing filtering liner, the water outlet end of the backflushing water inlet electric control valve, which is interconnected with the water inlet electric control valve, of the water inlet end is connected with the water outlet end of the to-be-backflushing filtering liner, and the backfl; the electric control device controls the water inlet electric control valve to be conducted and controls the backflushing water inlet electric control valve and the water outlet electric control valve to be closed to form a preposed filtering channel for positive water passing of each preposed filtering container which is connected in series and convey the water to the reverse osmosis membrane filtering container for water making through the booster pump; the electric control device controls the closing of the water inlet electric control valve and controls the simultaneous conduction of a backflushing water inlet electric control valve behind a filter liner to be backflushed and a water outlet electric control valve in front of the filter liner to be backflushed, so that water is fed from the backflushing water inlet electric control valve and flows from the water outlet end of the backflushing water inlet electric control valve to the water inlet end through the connected water outlet end of the filter liner to be backflushing water inlet end, then the water outlet end of the water outlet electric control valve is additionally provided with a backflushing discharge pipeline connected with the water outlet end of each water outlet electric control valve and a backflushing channel for discharging water from the discharge pipeline, and the electric control device is characterized by also being provided with a remote control terminal, an internet communication receiving device which; the remote control terminal establishes communication with an electric control device connected with the direct discharge control recoil circuit through an internet communication receiving device and sends out a control instruction signal; the electric control device receives the control instruction signal through the internet communication receiving device, or immediately or according to preset time, triggers the connected direct-discharge recoil control circuit to start a direct-discharge recoil control program for each filter container to be recoiled: under the condition that the preposed filtering channel is in a to-be-operated mode, the electric control device controls the water inlet electric control valve to be closed and conducts the related backflushing water inlet electric control valve and the related backflushing water outlet electric control valve to carry out independent reverse water washing on each to-be-backflushing filter container for a certain time length in sequence and discharge the water from the conducted discharge pipeline until the reverse water washing on each to-be-backflushing filter container is completed and then automatically switched back to the to-be-operated mode; the corresponding reverse water passing mode is a raw water backflushing mode which controls a water inlet electric control valve at the head end of the prepositive filtering channel to be closed and controls a backflushing water inlet electric control valve at a water inlet end interconnected with the water inlet electric control valve and a water outlet electric control valve between the water inlet electric control valve and a filter liner to be backflushed to be conducted simultaneously, or a filtering backflushing mode which controls a water inlet electric control valve behind the prepositive filter liner to be closed and controls a backflushing water inlet electric control valve at a water inlet end interconnected with the water inlet electric control valve and a water outlet electric control valve between the water inlet electric control valve and the filter liner to be backflushed to be conducted simultaneously.

A remote switching method for a pre-filter liner filtering and backflushing channel of a water purifier is characterized in that a base is provided with a water inlet pipeline, a pure water pipeline, a discharge pipeline and an electric control device; the device comprises a reverse osmosis membrane filter liner, a plurality of filter liners, a water inlet pipeline, a water outlet pipeline and a water outlet pipeline, wherein the filter liners are sequentially connected in series to form a filter channel, the filter liners are positioned in front of the reverse osmosis membrane filter liner to form a pre-filter channel, the head end of the pre-filter channel is connected with the water inlet pipeline, and all or part of the pre-filter liners are to-be-backflushed filter liners needing to be backwashed and; the water inlet end of the reverse osmosis membrane filter liner is connected with the tail end of the preposed filtering channel through a booster pump, the water outlet pipeline of the reverse osmosis membrane filter liner is connected with a pure water pipeline, and the concentrated water discharge pipeline of the reverse osmosis membrane filter liner is connected with a discharge pipeline through a concentrated water discharge flow control device; in addition, a plurality of water passing electric control valves including a water inlet electric control valve for controlling water passing of the pre-filtering channel, a backflushing water inlet electric control valve for controlling reverse water passing of the pre-filtering channel and a water outlet electric control valve are arranged around the to-be-backflushing filtering liner in the pre-filtering channel and connected with related water ways, wherein the water outlet end of the water inlet electric control valve and the water inlet end of the water outlet electric control valve positioned behind the water inlet electric control valve are communicated with the water inlet end of the to-be-backflushing filtering liner, the water outlet end of the backflushing water inlet electric control valve, which is interconnected with the water inlet electric control valve, of the water inlet end is connected with the water outlet end of the to-be-backflushing filtering liner, and the backfl; the electric control device controls the water inlet electric control valve to be conducted and controls the backflushing water inlet electric control valve and the water outlet electric control valve to be closed to form a preposed filtering channel for positive water passing of each preposed filtering container which is connected in series and convey the water to the reverse osmosis membrane filtering container for water making through the booster pump; the electric control device controls the closing of the water inlet electric control valve and controls the simultaneous conduction of a backflushing water inlet electric control valve behind a filter liner to be backflushed and a water outlet electric control valve in front of the filter liner to be backflushed, so that water is fed from the backflushing water inlet electric control valve and flows through a water outlet end of the filter liner to be backflushed to a water inlet end, then the water outlet end of the water outlet electric control valve is connected with a backflushing discharge pipeline of the water outlet end of each water outlet electric control valve and a backflushing channel for discharging water from the discharge pipeline, and the electric control device is characterized by also being provided with a remote control terminal, an internet communication receiving device which is connected with the remote control terminal and keeps internet networking communication, a direct-discharge control backflushing circuit which is provided with and starts an internet backflushing control program, and a second-stage water inlet electric control valve which is used for; the remote control terminal establishes communication with an electric control device connected with the direct discharge control recoil circuit through an internet communication receiving device and sends out a control instruction signal; the electric control device receives the control instruction signal through the internet communication receiving device, or immediately or according to preset time, triggers the connected direct-discharge recoil control circuit to start a direct-discharge recoil control program for each filter container to be recoiled: under the condition that the preposed filtering channel is in a to-be-operated mode, the electric control device controls the water inlet electric control valve to be closed and conducts the related backflushing water inlet electric control valve and the related backflushing water outlet electric control valve to carry out independent reverse water washing on each to-be-backflushing filter container for a certain time length in sequence and discharge the water from the conducted discharge pipeline until the reverse water washing on each to-be-backflushing filter container is completed and then automatically switched back to the to-be-operated mode; the corresponding reverse water passing mode is a combined mode of a raw water backflushing mode and a filtering backflushing mode: the electric control device controls a water inlet electric control valve at the head end of the prepositive filtering channel to be closed and controls a backflushing water inlet electric control valve at a water inlet end which is connected with the water inlet electric control valve and a water outlet electric control valve between the water inlet electric control valve and a preceding filter container to be backflushed to be conducted at the same time to form a raw water backflushing mode of the filter container to be backflushed at a preceding stage; the electric control device controls the water inlet electric control valve and the front filter container at the front stage to conduct forward water passing, controls the second-stage water inlet electric control valve behind the front filter container at the front stage to be closed, and controls the back backflushing water inlet electric control valve at the water inlet end connected with the second-stage water inlet electric control valve and the corresponding water outlet electric control valve behind the second-stage water inlet electric control valve and in front of the back-stage filter container to be backflushed to be conducted simultaneously in a filtering backflushing mode.

The backflushing mode is characterized in that corresponding filtering backflushing modes are set for two-stage and three-stage filter liners to be backflushed in the three-stage preposed filter liners connected in series: the water inlet ends of the second and third stage backflushing water inlet electric control valves are connected with the water inlet ends of the second stage water inlet electric control valves in the pipeline between the first and second stage prepositive filter containers, the water outlet ends of the second and third stage backflushing water inlet electric control valves are respectively connected with the water outlet ends of the second and third stage filter containers to be backflushed, and the water inlet ends of the corresponding second and third stage water outlet electric control valves are respectively connected between the second stage water inlet electric control valve and the second stage filter container to be backflushing and the pipeline between the second and third stage filter containers to be backflushing; for the parallel-serial mode, the water inlet end of the later third stage backflushing water inlet electric control valve is connected with the water inlet end of the second stage water inlet electric control valve in a pipeline between the first stage and the second stage preposed filter containers, the water outlet end of the later third stage backflushing water inlet electric control valve is respectively connected with the water inlet end of the second stage backflushing water inlet electric control valve and the water outlet end of the third stage filter container to be backflushed, the water outlet end of the second stage backflushing water inlet electric control valve is connected with a pipeline between the second stage filter container and the third stage filter container to be backflushing water inlet end of the third stage water outlet electric control valve, and the water inlet end of; for the serial connection mode, the water inlet end of the second-stage backflushing water inlet electric control valve at the back is connected with the water inlet end of the second-stage water inlet electric control valve in a pipeline between the first-stage and second-stage preposed filter containers, the water outlet end of the second-stage backflushing water inlet electric control valve is respectively connected with the water inlet end of the third-stage backflushing water inlet electric control valve and the water outlet end of the second-stage filter container to be backflushed, and the third-stage water inlet electric control valve which is connected in series; the water outlet end of the third-stage backflushing water inlet electric control valve is connected with the water outlet end of the third-stage filter container to be backflushed 13; the water inlet ends of the corresponding second-stage water outlet electric control valve and the corresponding third-stage water outlet electric control valve are respectively connected between the second-stage water inlet electric control valve and the second-stage filter container to be backflushed and in a pipeline between the third-stage water inlet electric control valve and the third-stage filter container to be backflushed.

The remote terminal sets the electric control device of each water purifier controlled by the remote terminal and sends out the same control instruction signal; the electric control device of each water purifier receives the control instruction signal through the internet communication receiving device which is configured for each water purifier, or immediately or according to preset time, the electric control device starts the direct-discharge backflushing control program aiming at each filter container to be backflushed which is controlled by each water purifier.

The electric control device is provided with an inline recoil key switch for manually starting an inline recoil control program; when the in-line backflushing key switch is pressed down, the electric control device starts an in-line backflushing control program aiming at each filter container to be backflushed immediately or according to preset time: the electric control device conducts the related backflushing water inlet electric control valve and the related water outlet electric control valve to carry out independent reverse water washing on each filter container to be backflushed for a certain time in sequence and discharge the filter containers through the discharge pipeline.

The back flushing discharge pipeline is connected with the tail end of the front filtering channel or the pure water pipeline through a front water outlet electric control valve; an electric discharge valve is arranged in the discharge pipeline; pressing the straight-row backflushing key switch and selecting to immediately start a straight-row backflushing control program for each filter cartridge to be backflushed; the electric control device controls to close the discharge electric control valve and conducts the front water outlet electric control valve, and cleaning water containing impurities in the backflushing discharge pipeline is discharged from the purified water pipeline or the pure water pipeline through the front water outlet electric control valve.

A time length adjusting key is also arranged; the time length adjusting key adjusts and controls the timing length parameter in the direct-drainage back-flushing control program according to the water quality of the tap water entering the household.

The electric control device is provided with an exhaust switch for controlling and starting a preset exhaust control program; pressing the exhaust switch starts the exhaust control program of the electric control device: the electric control device conducts the related water passing electric control valves connected with the water inlet end or the water outlet end or the water inlet end and the water outlet end of each pre-arranged filter liner one by one in sequence for a short time, controls the inlet water of the water inlet pipeline to flow through one end or two ends of the pre-arranged filter liners and then flow out from the conducted tail end pipeline, and discharges the air in the pre-arranged filter liners and the related pipelines in the installation process of the pre-arranged filter liners; the end pipeline is either a water purification pipeline or a back flushing discharge pipeline; and the electric control device automatically switches to the to-be-operated mode after finishing the exhaust control program.

And a networking switch for controlling the operation or the closing of the Internet communication receiving device is also arranged.

Compared with the waterway switching device of the existing water purifier, the waterway switching device of the invention has the following advantages: the structure is simpler and more practical, the waterway sealing structure is extremely simple, the sealing switching surface structure and the multilayer dynamic sealing structure which have high requirements for preventing the condition of waterway short circuit or leakage by a manual waterway switching device are not arranged, the manufacturing is simple, the quality is stable, the efficiency is high, and the popularization is easy; adopt the controlling means control to make easy and simple to handle save time, laborsaving to both can press the key-press operation at any time, also can predetermine regularly or irregularly automatic completion, can also carry out or immediately or regularly or irregularly recoil to relevant filter element through remote control terminal remote control by producer or distributor and place the water purifier controlling means in internet WIFI coverage: the intelligent mobile phone serving as a remote control terminal (manufacturer personnel, distributor or user) can perform backflushing cleaning on the water purifier to improve the service quality, simultaneously avoid the problems of workload, labor intensity and service charge of home service, and can also perform backflushing cleaning control on a filter liner to be backflushed in the water purifier through APP software by the intelligent mobile phone serving as the remote control terminal, so that the service life of the filter liner is prolonged on the premise of avoiding the trouble of backflushing cleaning of a machine operated on site by the user, and the problem of 'dead water' does not exist in the machine. In addition, the technical scheme of 'remote centralized control of backwashing' solves the problem that 'how to determine good backwashing time and interval for the quality of household tap water facing different water networks' is often encountered in the process of using a water purifier user group provided with a waterway switcher. In addition, because the electric control valve is adopted to control the water inlet pipeline, the subsequent water passing pipeline is in a non-pressure-bearing state, and the machine is relatively safe even if the machine is in a long-term non-running state. In addition, the problems that the back flushing effect of the machine is not visible, a reverse osmosis membrane machine type wastes a large amount of water and the like can be solved.

Drawings

Fig. 1 is a schematic diagram of the self-control switching principle (raw water backflushing mode) of the invention, which adopts a water inlet electric control valve, three backflushing water inlet electric control valves, three water outlet electric control valves, an internet communication receiving device, a direct-discharge control backflushing circuit provided with a direct-discharge backflushing control program, and an electric control backflushing switching device combined with three to-be-backflushing filter containers.

FIG. 2 is a schematic diagram of the self-control switching principle (raw water backflushing and filtering backflushing combined mode) of the invention, which adopts a water inlet electric control valve, three backflushing water inlet electric control valves, three water outlet electric control valves, an internet communication receiving device, a direct-discharge control backflushing circuit provided with a direct-discharge backflushing control program, and an electric control backflushing switching device.

FIG. 3 is a schematic diagram of a filtering backflushing water path structure in a parallel connection mode surrounding two and three stages of to-be-backflushed filter liners on the basis of adopting the raw water backflushing and filtering backflushing combined mode shown in FIG. 2.

FIG. 4 is a schematic diagram of a filtering backflushing water path structure in a mode of surrounding a second-stage to-be-backflushing filter liner and a third-stage to-be-backflushing filter liner and being connected in series on the basis of adopting a raw water backflushing and filtering backflushing combined mode shown in FIG. 2.

FIG. 5 is a schematic diagram of a filtering backflushing water path structure in a series connection mode around two and three stages of filter liners to be backflushed on the basis of adopting the raw water backflushing and filtering backflushing combined mode shown in FIG. 2.

Detailed Description

Example 1. A remote switching method for a pre-filter liner filtering and back-flushing channel of a water purifier is characterized in that a base is provided with a water inlet pipeline, a water purifying pipeline, a discharge pipeline and an electric control device; a single filter material layer or a plurality of filter material layers are arranged on the filter liner to be backflushed as the front filter liner; the water inlet end and the water outlet end of the filter liner to be backflushed are respectively connected with a water inlet pipeline and a water purifying pipeline to form a preposed filtering channel; and in addition, three water passing electric control valves including a water inlet electric control valve for controlling water inlet of the to-be-backflushed filter container, a backflush water inlet electric control valve for controlling reverse water passing of the to-be-backflushed filter container and a water outlet electric control valve are arranged around the to-be-backflushed filter container and connected with related water paths, wherein the water outlet end of the water inlet electric control valve and the water inlet end of the water outlet electric control valve positioned behind the water inlet electric control valve are communicated with the water inlet end of the to-be-backflushed filter container, and the water inlet end of the water outlet electric control valve which is connected with the water.

The electric control device controls the water inlet electric control valve to be conducted and controls the backflushing water inlet electric control valve and the water outlet electric control valve to be closed to form a pre-filtering channel for forward water passing of the backflushing filter container; the electric control device controls the water inlet electric control valve to be closed and controls the backflushing water inlet electric control valve to be communicated with the water outlet electric control valve positioned in front of the to-be-backflushing filter liner simultaneously, so that a backflushing channel for water to enter from the backflushing water inlet electric control valve and to pass through the connected water outlet end of the to-be-backflushing filter liner to the water inlet end and then to be discharged from the water outlet end of the water outlet electric control valve and a discharge pipeline additionally connected with the water outlet end of the water outlet electric control valve is formed, and the corresponding water.

The remote switching method of the water purifier is also provided with a remote control terminal, an internet communication receiving device which is established with the remote control terminal and keeps internet networking communication, and a direct discharge control backflushing circuit which is used for setting and starting a direct discharge backflushing control program; the remote control terminal establishes communication with an electric control device connected with the direct discharge control recoil circuit through an internet communication receiving device and sends out a control instruction signal; the electric control device receives the control instruction signal through the internet communication receiving device, or immediately or according to preset time, triggers a connected direct-discharge control backflushing circuit to start a direct-discharge backflushing control program aiming at the filter container to be backflushed: and under the condition that the preposed filtering channel is in the to-be-operated mode, the electric control device controls the water inlet electric control valve to be closed, conducts the backflushing water inlet electric control valve and the water outlet electric control valve to carry out reverse water cleaning on the to-be-backflushed filter container for a fixed time and discharges the to-be-backflushed filter container through the conducted backflushing discharge pipeline until the backflushing cleaning of the to-be-backflushed filter container is completed and then automatically switches back to the to-be-operated.

In this embodiment, the electric control device 4 is connected to and controls the water inlet electric control valve, the backflushing electric control valve and the water outlet electric control valve through three groups of control lead terminals, so as to realize the switching between the forward water passing and the reverse water passing of the filter container to be backflushed.

Example 2. The description is combined with the attached figures 1 and 2. A remote switching method for the filtering and back flushing channel of the front filter liner of a water purifier is characterized in that a base 22 is provided with a water inlet pipeline 2, a water purifying pipeline 9, a discharge pipeline 8 and an electric control device 4; the multiple preposed filter liners 1 are sequentially connected in series to form a preposed filter channel, the head end 1a and the tail end 1d of the preposed filter channel are respectively connected with a water inlet pipeline 2 and a water purification pipeline 9, and each preposed filter liner 1 or part or all of the preposed filter liners is a to-be-backflushed filter liner needing to be washed by reverse water; in addition, a plurality of water passing electric control valves 3 including a water inlet electric control valve 30 for controlling water passing of the pre-filtering channel, a backflushing water inlet electric control valve for controlling reverse water passing of the pre-filtering channel and a water outlet electric control valve are arranged around the to-be-backflushing filtering liner in the pre-filtering channel and connected with related water paths, wherein the water outlet end of the water inlet electric control valve 30 and the water inlet end of the water outlet electric control valve 34 positioned behind the water inlet electric control valve are communicated with the water inlet end of the to-be-backflushing filtering liner 11, the water outlet end of the backflushing water inlet electric control valve, which is mutually connected with the water inlet electric control valve 30, is connected with the water outlet end of the to-be-backflushing filtering liner, and the backflushing water inlet electric control.

The electric control device 4 is respectively connected with the control water inlet electric control valve 30, the three backflushing electric control valves 31, 32 and 33 and the three water outlet electric control valves 34, 35 and 36 through seven groups of control lead terminals 300, 310, 320, 330, 340, 350 and 360.

The water inlet end 30a of the water inlet electric control valve 30 and the water inlet end 31a of the backflushing water inlet electric control valve 31 are both connected with the water inlet pipeline 2; the water outlet end 34b of the water outlet electric control valve 34 is connected with the discharge pipeline 8 through a backflushing discharge pipeline 8 a; the water outlet end 30b of the water inlet electric control valve 30 and the water inlet end 34a of the water outlet electric control valve 34 are connected with the water inlet end 1a of the first filter container 11 to be backflushed in the preposed filter channel; the water outlet end 31b of the backflushing water inlet electric control valve 31 is connected with the water outlet end 1b of the first filter container 11 to be backflushed.

By analogy, the respective water inlet ends 32a and 33a of the two backflushing water inlet electronic control valves 32 and 33 corresponding to the second and third stages of filter liners 12 and 13 to be backflushed are both connected with the water inlet pipeline 2, the respective water outlet ends 35b and 36b of the two water outlet electronic control valves 35 and 36 are connected with the additionally arranged backflushing discharge pipeline 8a and the discharge pipeline 8, the respective water outlet ends 32b and 33b of the two backflushing water inlet electronic control valves 32 and 33 are respectively and correspondingly connected with the water outlet ends 1c and 1d of the two filter liners 12 and 13 to be backflushed, and the respective water inlet ends 35a and 36a of the two water outlet electronic control valves 35 and 36 are respectively and correspondingly connected with the water inlet ends 1b and 1c of the two filter liners 12 and 13 to be backfl. The water inlet electric control valve 30 is positioned in the water inlet pipelines of the two filter liners 12 and 13 to be backflushed.

The electric control device 4 controls the water inlet electric control valve 30 to be conducted and controls and closes a group of backflushing water inlet electric control valves 31, 32 and 33 and a group of water outlet electric control valves 34, 35 and 36 to form a preposed filtering channel for forward water passing of the 3 preposed filtering liners 11, 12 and 13 which are connected in series; the electric control device 4 controls the closing of the water inlet electric control valve 30 and controls the simultaneous conduction of a backflushing water inlet electric control valve at the back of a filter liner to be backflushed and a water outlet electric control valve at the front of the filter liner to be backflushed (according to the sequence of water passing of the filter channels, the same as the lower part), so that water is fed from the backflushing water inlet electric control valve and flows from the water outlet end of the filter liner to be backflushed to the water inlet end, and then the backflushing water outlet end of the water outlet electric control valve and a backflushing discharge pipeline 8a and a backflushing channel of water outlet of the discharge pipeline 8 are.

The electric control device 4 closes the water inlet electric control valve 30 and conducts the backflushing water inlet electric control valve 31 and the water outlet electric control valve 34 to carry out independent reverse water washing on the filter element 11 to be backflushed for a fixed time and to discharge water from the backflushing channel.

The electric control device 4 closes the water inlet electric control valve 30 and conducts the backflushing water inlet electric control valve 32 and the water outlet electric control valve 35 to carry out independent reverse water washing on the filter element 12 to be backflushed for a fixed time and water is discharged from the backflushing channel.

The electric control device 4 closes the water inlet electric control valve 30 and conducts the backflushing water inlet electric control valve 33 and the water outlet electric control valve 36 to carry out independent reverse water washing on the filter element to be backflushed 13 for a fixed time and to discharge water from the backflushing channel.

The remote switching method of the water purifier is also provided with a remote control terminal 7, an internet communication receiving device 6 which is in internet networking communication with the remote control terminal 7 and is used for setting and starting a direct discharging control backflushing circuit 5 of a direct discharging backflushing control program 5 a; the remote control terminal 7 establishes communication with the electric control device 4 connected with the direct discharge control recoil circuit 5 through the internet communication receiving device 6 and sends out a control instruction signal; the electric control device 4 receives the control instruction signal through the internet communication receiving device 6, or immediately or according to preset time, triggers the connected direct-discharge recoil control circuit 5 to start a direct-discharge recoil control program 5a for each filter cartridge to be recoiled: under the condition that the preposed filtering channel is in a to-be-operated mode, the electric control device 4 controls the water inlet electric control valve to be closed and conducts the related backflushing water inlet electric control valve and the related backflushing water outlet electric control valve to carry out independent reverse water washing on each to-be-backflushed filtering container for a certain time in sequence and discharge the water from the conducted discharge pipeline until the reverse water washing on each to-be-backflushed filtering container is completed and then automatically switched back to the to-be-operated mode.

The corresponding reverse water passing mode is a raw water backflushing mode which controls a water inlet electric control valve at the head end of the prepositive filtering channel to be closed and controls a backflushing water inlet electric control valve at a water inlet end interconnected with the water inlet electric control valve and a water outlet electric control valve between the water inlet electric control valve and a filter liner to be backflushed to be conducted simultaneously, or a filtering backflushing mode which controls a water inlet electric control valve behind the prepositive filter liner to be closed and controls a backflushing water inlet electric control valve at a water inlet end interconnected with the water inlet electric control valve and a water outlet electric control valve between the water inlet electric control valve and the filter liner to be backflushed to be conducted simultaneously.

Example 3. A remote switching method for the pre-filter liner filtering and back flushing channel of a water purifier is characterized in that a base 22 is provided with a water inlet pipeline 2, a pure water pipeline 20, a discharge pipeline 8 and an electric control device 4; a plurality of filter liners 1 including a reverse osmosis membrane filter liner 14 are sequentially connected in series to form a filter channel, wherein a preposed filter liner positioned in front of the reverse osmosis membrane filter liner 14 is connected in series to form a preposed filter channel, the head end 1a of the preposed filter channel is connected with a water inlet pipeline, and each preposed filter liner or part or all of the preposed filter liners is a filter liner to be backflushed, which needs to be washed by reverse water; the water inlet end of the reverse osmosis membrane filter liner 14 is connected with the tail end 1d of the pre-filtering channel through a booster pump 10, the water outlet pipeline of the reverse osmosis membrane filter liner is connected with a pure water pipeline 20, and the concentrated water discharge pipeline 21 of the reverse osmosis membrane filter liner is connected with a discharge pipeline 8 through a concentrated water discharge flow control device 21 a; in addition, a plurality of water passing electric control valves including a water inlet electric control valve for controlling water passing of the pre-filtering channel, a backflushing water inlet electric control valve for controlling reverse water passing of the pre-filtering channel and a water outlet electric control valve are arranged around the to-be-backflushing filtering liner in the pre-filtering channel and connected with related water paths, wherein the water outlet end of the water inlet electric control valve and the water inlet end of the water outlet electric control valve positioned behind the water inlet electric control valve are communicated with the water inlet end of the to-be-backflushing filtering liner, the water outlet end of the backflushing water inlet electric control valve, which is interconnected with the water inlet electric control valve, of the water inlet end is connected with the water outlet end of the to-be-backflushing filtering liner, and the number.

The electric control device 4 controls the water inlet electric control valve to be conducted and controls the backflushing water inlet electric control valve and the water outlet electric control valve to be closed to form a preposed filtering channel for positive water passing of each preposed filtering container 1 which is connected in series, and the preposed filtering channel is conveyed to the reverse osmosis membrane filtering container 14 through the booster pump 10 to produce water; the electric control device 4 controls the closing of the water inlet electric control valve and controls the simultaneous conduction of a backflushing water inlet electric control valve at the back of the filter liner to be backflushed and a water outlet electric control valve at the front of the filter liner to be backflushed, so that water is fed from the backflushing water inlet electric control valve, flows from the water outlet end of the backflushing water inlet electric control valve to the water inlet end through the connected water outlet end of the filter liner to be backflushing, and then flows through the water outlet end of the water outlet electric control valve, a backflushing discharge pipeline 8a additionally connected with the water outlet end of each water.

The electronic control device 4 is connected with three backflushing electronic control valves 31, 32 and 33 and three water outlet electronic control valves 34, 35 and 36 through six groups of control lead terminals 310, 320, 330, 340, 350 and 360 respectively. In addition, the electric control device 4 controls the water inlet electric control valve through a group of control lead terminals.

The water outlet end 34b of the water outlet electric control valve 34 is connected with the backflushing discharge pipeline 8a, and the water inlet end 34a of the water outlet electric control valve 34 is connected with the water inlet end 1a of the first filter container 11 to be backflushed in the pre-filtering channel; the water outlet end 31b of the backflushing water inlet electric control valve 31 corresponding to the first-stage to-be-backflushing filter container 11 is connected with the water outlet end 1b of the first to-be-backflushing filter container 11.

By analogy, the respective water outlet ends 35b and 36b of the two water outlet electric control valves 35 and 36 corresponding to the second-stage and third-stage filter liners to be backflushed are respectively connected with the backflushing discharge pipeline 8a and the discharge pipeline 8, the respective water outlet ends 32b and 33b of the two backflushing water inlet electric control valves 32 and 33 are respectively and correspondingly connected with the water outlet ends 1c and 1d of the two filter liners to be backflushed 12 and 13, and the respective water inlet ends 35a and 36a of the two water outlet electric control valves 35 and 36 are respectively connected with the water inlet ends 1b and 1c of the two filter liners to be backflushed 12 and 13. The water inlet electric control valve 30 is positioned in the water inlet pipelines of the two filter liners 12 and 13 to be backflushed.

The electric control device 4 controls the water inlet electric control valve 30 to be conducted and controls and closes a group of backflushing water inlet electric control valves 31, 32 and 33 and a group of water outlet electric control valves 34, 35 and 36 to form a preposed filtering channel for forward water passing of the 3 preposed filtering liners 11, 12 and 13 which are connected in series; the electric control device 4 controls the closing of the water inlet electric control valve 30 and controls the simultaneous conduction of a backflushing water inlet electric control valve at the back of a filter liner to be backflushed and a water outlet electric control valve at the front of the filter liner to be backflushed (according to the sequence of water passing of the filter channels, the same as the lower part), so that water is fed from the backflushing water inlet electric control valve and flows from the water outlet end of the filter liner to be backflushed to the water inlet end, and then the backflushing water outlet end of the water outlet electric control valve and a backflushing discharge pipeline 8a and a backflushing channel of water outlet of the discharge pipeline 8 are.

The electric control device 4 closes the water inlet electric control valve and conducts the backflushing water inlet electric control valve 31 and the water outlet electric control valve 34 to carry out independent reverse water washing on the filter element 11 to be backflushed for a fixed time and to discharge water from the backflushing channel.

The electric control device 4 closes the water inlet electric control valve and conducts the backflushing water inlet electric control valve 32 and the water outlet electric control valve 35 to carry out independent reverse water washing on the to-be-backflushing filter container 12 for a fixed time and to discharge water from the backflushing channel.

The electric control device 4 closes the water inlet electric control valve and conducts the backflushing water inlet electric control valve 33 and the water outlet electric control valve 36 to carry out independent reverse water washing on the filter element to be backflushed 13 for a fixed time and to discharge water from the backflushing channel.

The remote switching method of the water purifier is also provided with a remote control terminal 7, an internet communication receiving device 6 which is in internet networking communication with the remote control terminal 7 and is used for setting and starting a direct discharging control backflushing circuit 5 of a direct discharging backflushing control program 5 a; the remote control terminal 7 establishes communication with the electric control device 4 connected with the direct discharge control recoil circuit 5 through the internet communication receiving device 6 and sends out a control instruction signal; the electric control device 4 receives the control instruction signal through the internet communication receiving device 6, or immediately or according to preset time, triggers the connected direct-discharge recoil control circuit 5 to start a direct-discharge recoil control program 5a for each filter cartridge to be recoiled: and under the condition that the preposed filtering channel is in a to-be-operated mode, the electric control device controls the water inlet electric control valve to be closed and conducts the related backflushing water inlet electric control valve and the related backflushing water outlet electric control valve to carry out independent reverse water washing on each to-be-backflushed filter container for a certain time period in sequence and discharge the water from the conducted discharge pipeline until the reverse water washing on each to-be-backflushed filter container is completed and then the water is automatically switched back to the to-be-operated mode.

The corresponding reverse water passing mode is a raw water backflushing mode which controls a water inlet electric control valve at the head end of the prepositive filtering channel to be closed and controls a backflushing water inlet electric control valve at a water inlet end interconnected with the water inlet electric control valve and a water outlet electric control valve between the water inlet electric control valve and a filter liner to be backflushed to be conducted simultaneously, or a filtering backflushing mode which controls a water inlet electric control valve behind the prepositive filter liner to be closed and controls a backflushing water inlet electric control valve at a water inlet end interconnected with the water inlet electric control valve and a water outlet electric control valve between the water inlet electric control valve and the filter liner to be backflushed to be conducted simultaneously.

In examples 2 and 3, in the raw water backwashing mode, part or all of the filter bladders to be backwashed in the pre-filtration channel are subjected to separate reverse water washing by using unfiltered tap water raw water, and impurities accumulated on the water inlet side of the filter bladders to be backwashed or permeated in the filter material layer are reversely withdrawn. At the moment, the water inlet electric control valve is arranged in a water inlet pipeline (not only limited to the water inlet end of the filter liner to be backflushed) in front of the filter liner to be backflushed.

For the filtering back-flushing mode, tap water with less impurities after being filtered (positively-passing water) by tap water filtered (positively-passing water) by a front-arranged filter container is adopted, the rear part or all of the filter containers to be back-flushed are subjected to independent reverse water-passing cleaning, and impurities accumulated on the water inlet side of a single filter container to be back-flushed or permeated in a filter material layer are reversely withdrawn. At this time, the water inlet electric control valve is arranged in a pipeline between the front filter container and the rear filter container, and then tap water (raw water) in the water inlet pipeline can flow through the front filter container after the water inlet electric control valve is closed.

The water inlet electric control valve is arranged at the water inlet end of the first preposed filter container or in a water inlet pipeline and corresponds to a primary or multi-stage raw water backflushing mode, or is arranged in a pipeline between the first preposed filter container and the second preposed filter container and corresponds to a secondary or tertiary filtering backflushing mode, or is arranged in a pipeline between the second preposed filter container and the third preposed filter container and corresponds to a filtering backflushing mode of a filter container to be backflushed in three stages.

It is emphasized that the filtering backflushing mode is not suitable for the first stage pre-filter container in the pre-filter channel (the water path for cutting off the positive water flow is cut off when the water inlet electric control valve at the front end of the first stage pre-filter container is closed).

For the preposed filtering channels provided with 2 or 3 preposed filtering containers, a raw water backflushing mode can be adopted to backflush and clean part or all of the filtering containers to be backflushed, and a filtering backflushing mode can also be adopted to backflush and clean the following 1 or 2 filtering containers to be backflushed.

Example 4. A remote switching method for the pre-filter liner filtering and back flushing channel of a water purifier is characterized in that a base 22 is provided with a water inlet pipeline 2, a pure water pipeline 20, a discharge pipeline 8 and an electric control device 4; a plurality of filter liners including a reverse osmosis membrane filter liner 14 are sequentially connected in series to form a filter channel, wherein the filter liner positioned in front of the reverse osmosis membrane filter liner is connected in series to form a pre-filter channel, the head end 1a of the pre-filter channel is connected with a water inlet pipeline 2, and each pre-filter liner or part or all of the pre-filter liners are filter liners to be backflushed and need to be backwashed for water cleaning; the water inlet end of the reverse osmosis membrane filter liner 14 is connected with the tail end 1d of the pre-filtering channel through a booster pump 10, the water outlet pipeline of the reverse osmosis membrane filter liner is connected with a pure water pipeline 20, and the concentrated water discharge pipeline 21 of the reverse osmosis membrane filter liner is connected with a discharge pipeline 8 through a concentrated water discharge flow control device 21 a; in addition, a plurality of water passing electric control valves 3 including a water inlet electric control valve for controlling water passing of the pre-filtering channel, a backflushing water inlet electric control valve for controlling reverse water passing of the pre-filtering channel and a water outlet electric control valve are arranged around the to-be-backflushing filtering liner in the pre-filtering channel and connected with related water paths, wherein the water outlet end of the water inlet electric control valve and the water inlet end of the water outlet electric control valve positioned behind the water inlet electric control valve are communicated with the water inlet end or the water inlet pipeline of the to-be-backflushing filtering liner, the water outlet end of the backflushing water inlet electric control valve, which is mutually connected with the water inlet electric control valve, is connected with the water outlet end of the to-be-backflushing filtering liner, and the backflushing.

The electric control device controls the water inlet electric control valve to be conducted and controls the backflushing water inlet electric control valve and the water outlet electric control valve to be closed to form a preposed filtering channel for positive water passing of each preposed filtering container which is connected in series and convey the water to the reverse osmosis membrane filtering container for water making through the booster pump; the electric control device controls the closing of the water inlet electric control valve and controls the simultaneous conduction of a backflushing water inlet electric control valve at the back of the filter liner to be backflushed and a water outlet electric control valve at the front of the filter liner to be backflushed, so that water is fed from the backflushing water inlet electric control valve, flows from the water outlet end of the backflushing water inlet electric control valve to the water inlet end through the connected water outlet end of the filter liner to be backflushed, and then flows through the water outlet end of the water outlet electric control valve, a backflushing discharge pipeline connected with the water outlet end of each water outlet electric control valve and a backflushing channel connected with.

The remote switching method of the water purifier is also provided with a remote control terminal, an internet communication receiving device which is established with the remote control terminal and keeps internet networking communication, a direct-discharge control backflushing circuit which is provided with and starts a direct-discharge backflushing control program, and a second-stage water inlet electric control valve which is used for controlling the water passing of the front-positioned filtering channel and is positioned behind the front-positioned filtering liner; the remote control terminal establishes communication with an electric control device connected with the direct discharge control recoil circuit through an internet communication receiving device and sends out a control instruction signal; the electric control device receives the control instruction signal through the internet communication receiving device, or immediately or according to preset time, triggers the connected direct-discharge recoil control circuit to start a direct-discharge recoil control program for each filter container to be recoiled: and under the condition that the preposed filtering channel is in a to-be-operated mode, the electric control device controls the water inlet electric control valve to be closed and conducts the related backflushing water inlet electric control valve and the related backflushing water outlet electric control valve to carry out independent reverse water washing on each to-be-backflushed filter container for a certain time period in sequence and discharge the water from the conducted discharge pipeline until the reverse water washing on each to-be-backflushed filter container is completed and then the water is automatically switched back to the to-be-operated mode.

The corresponding reverse water passing mode is a combined mode of a raw water backflushing mode and a filtering backflushing mode: the electric control device controls a water inlet electric control valve at the head end of the prepositive filtering channel to be closed and controls a backflushing water inlet electric control valve at a water inlet end which is connected with the water inlet electric control valve and a water outlet electric control valve between the water inlet electric control valve and a preceding filter container to be backflushed to be conducted at the same time to form a raw water backflushing mode of the filter container to be backflushed at a preceding stage; the electric control device controls the water inlet electric control valve and the front filter container at the front stage to conduct forward water passing, controls the second-stage water inlet electric control valve behind the front filter container at the front stage to be closed, and controls the back backflushing water inlet electric control valve at the water inlet end connected with the second-stage water inlet electric control valve and the corresponding water outlet electric control valve behind the second-stage water inlet electric control valve and in front of the back-stage filter container to be backflushed to be conducted simultaneously in a filtering backflushing mode.

For the preposed filtering channels provided with 2 or 3 preposed filtering containers, performing raw water backflushing cleaning on 1 or 2 filtering containers to be backflushed in the front (stage) by adopting a raw water backflushing mode; and (3) carrying out filtering back-flushing cleaning on the corresponding back-flushing filter container to be back-flushed in a filtering back-flushing mode, and then carrying out back-flushing cleaning on all the filter containers to be back-flushed in the front filtering channel. When two filter liners to be backflushed in the front 3 filter liners of the front filter channel respectively adopt a raw water backflushing mode and a filter backflushing mode, the combination of the two backflushing modes in the embodiment 1 or 2 can be adopted.

In embodiments 1 to 4, the electronic control device detects a state at a time when the direct discharge backwashing control program is to be started, and after confirming that the state is in the to-be-operated mode, controls the water inlet electronic control valve to be closed, and conducts the backwashing water inlet electronic control valve and the water outlet electronic control valve to perform (single) backwashing for a fixed time period on the one or more to-be-backwashed filter cartridges, and discharges the backwashing water through the conducted backwashing discharge pipeline, until the backwashing of the one or more to-be-backwashed filter cartridges is completed, and then automatically switches back to the to-be-operated mode.

When the electric control device of the machine is in the operating mode, the electric control device continues to operate until the operating mode is finished and is switched back to the state of the standby operating mode, then the water inlet electric control valve is controlled to be closed, the backflushing water inlet electric control valve and the water outlet electric control valve are conducted to conduct (single) reverse water cleaning with fixed time length on one or more filter containers to be backflushed, and the filter containers are discharged through the conducted backflushing discharge pipeline until the reverse water cleaning on the one or more filter containers to be backflushed is finished and then are automatically switched back to the standby operating mode.

The remote control terminal can be a special remote control device set by a manufacturer or a distributor, and can also be an intelligent mobile phone used as the remote control terminal (or manufacturer personnel or the distributor or a user). The backflushing filter cartridge to be backflushed in the water purifier which is in the coverage range of the Internet and keeps the Internet networking communication contact state can be controlled by a remote control terminal set by a manufacturer or a distributor or an intelligent mobile phone serving as the remote control terminal (or manufacturer personnel, the distributor or a user) to perform backflushing cleaning operation immediately or regularly or irregularly. When the manufacturer personnel, the dealer or the user adopt the intelligent mobile phone, the intelligent mobile phone is controlled through APP software.

The internet communication receiving device which is established with the remote control terminal and keeps internet networking communication contact can adopt wireless internet networking communication contact and can also adopt wired internet networking communication contact. The remote control terminal carries out remote control switching of a recoil mode on a water purifier which is in an internet (wireless or wired) coverage range and is provided with an internet communication receiving device.

The internet communication receiving device and the electric control device can be separated from the direct discharge recoil control circuit which is provided and starts the direct discharge recoil control program, and can also be combined into a whole.

When the electric control device receives the control instruction signal through the configured internet communication receiving device and detects that the state at the moment when the direct discharge recoil control program is started is in the running mode, the electric control device delays to the state that the electric control device is switched back to the standby running mode from the running mode, and then triggers the connected direct discharge recoil control circuit to start the direct discharge recoil control program.

As an improvement, a networking switch for controlling the operation or the closing of the Internet communication receiving device is also arranged.

In embodiments 2 to 4, the number of the (one) set of back flushing water inlet electronic control valves may also be less than the number of the filter bladders to be back flushed, and the number of the (one) set of corresponding water outlet electronic control valves is equal to the number of the (one) set of back flushing water inlet electronic control valves. At this time, only a part of the enzyme filter cartridge 1 in the filtration passage is the filter cartridge to be backflushed, and there are two cases:

in the first case: the backflushing water inlet electric control valve and the water outlet electric control valve are respectively connected with the water outlet end and the water inlet end of the same filter container to be backflushed, and each filter container to be backflushed in the filter channel has an independent backflushing function.

In the second case: the backflushing water inlet electric control valve and the backflushing water outlet electric control valve are respectively connected with the water outlet end of different to-be-backflushed filter containers and the water inlet end positioned in front of the water outlet end, namely the filter containers to be backflushed which cannot be backflushed independently exist in the filter channel. Each filter liner to be backflushed, which is arranged between the water outlet end of the backflush water inlet electric control valve and the water inlet end of the water outlet electric control valve, is regarded as a filter liner to be backflushed with a plurality of filter material layers.

In the scheme, the water purifier is generally provided with the multi-filter-material composite filter container, and a plurality of filter containers which do not change the water passing path are treated as one filter container, so that two corresponding filter containers to be backflushed which are connected in series are also treated as one filter container to be backflushed.

On the basis of 'full backflushing with three filter containers (three filter containers to be backflushed)', if one filter container is added:

a recoil water inlet electric control valve and a water outlet electric control valve can be added to the corresponding base, and the four filter containers to be recoiled have independent recoil functions. And so on.

In addition, the base can also keep the original structure, and the newly added filter liner to be backflushed is connected with the original filter liner to be backflushed in series and then is still connected to the original interface position. At the moment, the two filter liners to be backflushed are regarded as a composite filter liner with a plurality of filter material layers to be treated. And so on.

When the newly added filter container is connected in series with the tail end of the original filter channel (behind the last filter container to be backflushed), and a backflush water inlet electric control valve and a water outlet electric control valve are not additionally arranged, only one filter container is added, and the filter containers with the backflush function still maintain the original three.

Example 5. On the basis of the embodiment 2-4, the backflushing mode is set corresponding filtering backflushing modes aiming at the second and third stages of filter liners to be backflushed 12 and 13 which are used as the second and third stages of preposed filter liners in the three stages of preposed filter liners connected in series: the second and third filtering backflushing modes are parallel connection modes or series connection modes, wherein:

for the parallel connection mode (the structure shown in fig. 3), the water inlet ends of the second and third stage backflushing water inlet electric control valves 32 and 33 at the back are connected with the water inlet end of the second stage water inlet electric control valve 37 in the pipeline between the first and second stage preposed filter containers 11 and 12, the water outlet ends of the second and third stage backflushing water inlet electric control valves 32 and 33 are respectively connected with the water outlet ends of the second and third stage backflushing filter containers 12 and 13, and the water inlet ends of the corresponding second and third stage water outlet electric control valves 35 and 36 are respectively connected between the second stage water inlet electric control valve 37 and the second stage backflushing filter container 12 and the pipeline between the second and third stage backflushing filter containers 12 and 13.

Under the premise that the water inlet electric control valve 30 and the first-stage to-be-backflushed filter container 11 are communicated to pass through water and the first-stage backflushed water inlet electric control valve and the first-stage water outlet electric control valve 34 are closed, the electric control device controls to close the second-stage water inlet electric control valve 37 or communicate the second-stage backflushed water inlet electric control valve 32 and the second-stage water outlet electric control valve 35 to form a filtering backflush channel of the second-stage to-be-backflushed filter container; or the third stage backflushing water inlet electric control valve 33 and the third stage water outlet electric control valve 36 are communicated to form a filtering backflushing channel of the third stage filter container 13 to be backflushed.

In the parallel-serial mode (the structure shown in fig. 4), the water inlet end of the following third stage backflushing water inlet electric control valve 33 is connected with the water inlet end of the second stage water inlet electric control valve 37 in the pipeline between the first and second stage prepositive filter liners 11 and 12, the water outlet end of the third stage backflushing water inlet electric control valve 33 is respectively connected with the water inlet end of the second stage backflushing water inlet electric control valve 32 and the water outlet end of the third stage filter liner 13 to be backflushed, the water outlet end of the second stage backflushing water inlet electric control valve 32 is connected with the pipeline between the second and third stage filter liners 12 and 13 to be backflushing and connected with the water inlet end of the third stage water outlet electric control valve 36, and the water inlet end of the second stage water outlet electric control.

Under the premise that the water inlet electric control valve 30 and the first-stage to-be-backflushed filter container 11 are communicated with water and the first-stage backflushed water inlet electric control valve and the first-stage water outlet electric control valve 34 are closed, the electric control device controls to close the second-stage water inlet electric control valve 37, or sequentially communicates the third and second-stage backflushed water inlet electric control valves 33 and 32 and the second-stage water outlet electric control valve 35 to form a filtering backflush channel of the second-stage to-be-backflushed filter container 12; or the third stage backflushing water inlet electric control valve 33 and the third stage water outlet electric control valve 36 are communicated to form a filtering backflushing channel of the third stage filter container 13 to be backflushed.

For the serial connection mode (the structure shown in fig. 5), the water inlet end of the second-stage backflushing water inlet electronic control valve 32 at the back is connected with the water inlet end of a second-stage water inlet electronic control valve 37 positioned in a pipeline between the first-stage and second-stage prepositive filter liners 11 and 12, the water outlet end of the second-stage backflushing water inlet electronic control valve 32 is respectively connected with the water inlet end of a third-stage backflushing water inlet electronic control valve 33 and the water outlet end of the second-stage to-be-backflushing filter liner 12, and is connected with the water inlet end of the third-stage to-; the water outlet end of the third-stage backflushing water inlet electric control valve is connected with the water outlet end of the third-stage filter container to be backflushed 13; the respective water inlet ends of the corresponding second and third-stage water outlet electric control valves 35 and 36 are respectively connected between the second-stage water inlet electric control valve 37 and the second-stage filter container 12 to be backflushed and in the pipeline between the third-stage water inlet electric control valve 38 and the third-stage filter container 13 to be backflushed.

Under the premise that the water inlet electric control valve 30 and the first-stage to-be-backflushed filter container 11 are communicated to pass through water and the first-stage backflushed water inlet electric control valve and the first-stage water outlet electric control valve 34 are closed, the electric control device controls to close the second-stage water inlet electric control valve 37 or communicate the second-stage backflushed water inlet electric control valve 32 and the second-stage water outlet electric control valve 35 to form a filtering backflush channel of the second-stage to-be-backflushed filter container; or the second and third stage backflushing water inlet electric control valves 32 and 33 and the third stage water outlet electric control valve 36 are conducted in sequence to form a filtering backflushing channel of the third stage filter container 13 to be backflushed.

On the basis, a primary preposed filter container in the preposed filter channel can also be set as a filter container to be backflushed; the corresponding backflushing mode is to set a corresponding raw water backflushing mode for a first-stage to-be-backflushing filter container 11 serving as a first-stage pre-filter container in the three-stage pre-filter containers connected in series, such as a water inlet electric control valve 30, a first-stage backflushing water inlet electric control valve 31 and a first-stage water outlet electric control valve 34 which are arranged around the first-stage to-be-backflushing filter container 11 in the attached figures 3-5.

The waterway structure adopted in the attached drawing 2 can adopt a pure water model in a raw water backwashing and filtering backwashing combined waterway structure mode shown in the attached drawing 3, can also adopt a raw water backwashing and filtering backwashing combined waterway structure shown in the attached drawing 4, and can also adopt a raw water backwashing and filtering backwashing combined waterway structure shown in the attached drawing 5.

On the basis of the water purifier shown in the attached figure 2, the water purifier can be obtained by removing the booster pump, the reverse osmosis membrane filter liner and the concentrated water discharge flow control device.

On the water purifier type basis that the preposed filtering channel adopts a three-level raw water backflushing waterway structure mode in the attached drawing 1, the water purifier type can be additionally modified with reference to the attached drawing 2: the back end of the purified water pipeline 9 is sequentially connected with a booster pump, a reverse osmosis membrane filter liner and a concentrated water discharge flow control device, and a back flushing discharge pipeline 8a is connected with a discharge pipeline at the back end of the concentrated water discharge flow control device to form a pure water model of a corresponding three-stage raw water back flushing mode.

In fig. 2, on the basis that the electric control device 4 is connected with the water inlet electric control valve, the three backflushing electric control valves and the three water outlet electric control valves through seven groups of control lead terminals by related leads respectively, for the waterway structure in the parallel connection mode shown in fig. 3 and the waterway structure in the parallel connection mode shown in fig. 4, the electric control device 4 is further provided with an eighth group of control lead terminals 370 and is connected with the second-stage water inlet electric control valve 37 by leads. For the waterway structure with the serial connection mode shown in fig. 5, the electronic control device 4 is further provided with eighth and ninth sets of control lead terminals 370 and 380 and connected to the second and third-stage water inlet electronic control valves 37 and 38 by related leads, respectively.

Example 6. On the basis of the embodiments 1, 2, 3, 4 and 5, the remote terminal sets and sends the same control command signal for each electric control device controlled by the remote terminal; the electric control device of each water purifier receives the control instruction signal through the internet communication receiving device which is configured for each water purifier, or immediately or according to preset time, the electric control device starts the direct-discharge backflushing control program aiming at each filter container to be backflushed which is controlled by each water purifier.

When the electric control device of the water purifier detects the state at the moment when the direct-discharge back-flushing control program is started and confirms the state in the to-be-operated mode, the direct-discharge back-flushing control program aiming at one or more to-be-back-flushed filter containers is started. When the electric control device of the water purifier is in the running mode, the electric control device continues to run until the running mode is finished and is switched back to the state of the standby running mode, and then the in-line backflushing control program for one or more to-be-backflushed filter containers is started.

Although the 'backflushing mode' is helpful for prolonging the service life of the filter liner, for setting the backflushing mode of 1-3 water purifiers with the filter liners to be backflushed in front, the initial time of the first backflushing, the two or three (backflushing) time lengths corresponding to the filter material layers of the filter liners and the time interval of the next backflushing are needed, 3-5 parameters are counted, and a user needs to comprehensively consider and set the backflushing time lengths corresponding to the filter material layers of the filter liners according to the using place and the water quality of the tap water entering the user and the operation frequency of the machine, so that the backflushing mode is troublesome and inexperienced, and particularly, the operation of.

The technical scheme of the remote centralized control of the backflushing solves the problem that the user group of the water purifier provided with the waterway switcher often encounters the problem of how to determine the good backflushing and cleaning time and interval of the quality of the household tap water facing different water networks in the using process of the water purifier: the user is not concerned with the problems of "when to perform the backflushing wash" and "interval between backflushing washes", all is left to the manufacturer or distributor for remote processing, and there is neither a concern behind the operational aspect nor the need to contact maintenance personnel for on-site service and pay the associated costs for this purpose during operation of the machine.

A manufacturer serving as a remote control terminal determines a guiding idea of ' controlling an electric control device to trigger a connected inline recoil control circuit to start an inline recoil control program at a specified time of each week, month or certain days of each season, such as 2 am ' before a certain model or all models of water purifiers leave a factory '. Even the remote control terminal may input in advance a specific timing of starting the kickback mode in the inline kickback control program. At the moment, the remote control terminal only needs to send out a command signal for starting the backflushing mode, so that the water purifiers distributed around can be controlled to respectively start the backflushing cleaning mode.

In addition, for some water purifier users used in special areas with water quality, a water purifier manufacturer can also authorize distributors in various areas to use the water purifier as a remote control terminal to set corresponding backflushing cleaning time intervals for the sold water purifier according to the water quality condition of a local tap water pipe network and send command signals for starting the backflushing mode on time. At this time, each local dealer serving as the remote control terminal sends out the control instruction signal, and a corresponding limit code needs to be set so as to limit the range of users receiving the control instruction signal.

In order to facilitate the orderliness and the long-term property of the 'remote centralized control back flushing' and avoid the irregular operation of dealers in various places so as to better serve users, a mode that a water purifier manufacturer performs unified instruction control on water purifiers produced by the water purifier manufacturer as a remote control terminal is preferably selected, and related setting work is completed in advance before products leave a factory.

The scheme of 'remote centralized control back flushing' of the water in the embodiment is simple and practical: the remote control terminal only needs to send a 'recoil' instruction signal through the internet; all the water purifiers provided with the internet communication receiving device, the electric control device, the straight-line control recoil circuit for setting and starting the straight-line recoil control program and the electric control recoil device can receive and start corresponding recoil modes (the identity recognition problem does not exist, and the control content is simple). The technical scheme is suitable for upgrading and reconstructing a new machine type adopting a remote centralized control recoil scheme and a sold old machine type.

For old models of various brands of water purifiers sold by tens of millions, related water passing electric control valves are additionally arranged and connected through hoses to form a water path switching structure in the attached drawings 1-5, an original electric control device is upgraded and modified to be set and start the function of an in-line control recoil circuit of an in-line recoil control program, an internet communication receiving device is configured to complete upgrading and modification, and then a remote control terminal instruction signal can be received and a corresponding recoil mode can be started.

The water purifier is different from common household electrical appliances: firstly, the function (filtering operation mode) of the machine is not changed; and secondly, the filter liner serving as a core component is periodically updated (the outdated and aging problems do not exist), so that before a new filtering technology appears, the 'filtering backflushing' function is added to the water purifier through upgrading and reconstruction, and the upgrading and updating in the aspect of important functions are realized.

The upgrading and modifying mode has wide application range. Because the old machines are mostly connected by hoses, the added water passing electric control valve can be inserted with pins at a seam and is not easily limited by the structure of the machine.

In this embodiment, the "remote control terminal" in the "remote control terminal sets the same control command signal for all the electric control devices controlled by the remote control terminal" refers to a manufacturer or a dealer of the water purifier.

Example 7. On the basis of the embodiments 1, 2, 3, 4, 5 and 6, the electric control device is provided with an inline recoil key switch for manually starting an inline recoil control program; when the in-line backflushing key switch is pressed down, the electric control device starts an in-line backflushing control program aiming at each filter container to be backflushed immediately or according to preset time: the electric control device conducts the related backflushing water inlet electric control valve and the related water outlet electric control valve to carry out independent reverse water washing on each filter container to be backflushed for a certain time in sequence and discharge the filter containers through the discharge pipeline.

A user of the water purifier can control the electric control device through the direct-discharge backflushing key switch or immediately or according to preset time start a direct-discharge backflushing control program (through a discharge pipeline) aiming at each filter container to be backflushed, and then the automatic control backflushing switching mode treatment of the electric control backflushing switching device is realized.

Example 8. On the basis of the embodiment 7, a front water outlet electric control valve (not shown) is connected between the backflushing discharge pipeline and the purified water pipeline 9 or the purified water pipeline 20; an electric discharge valve (not shown) is arranged in the discharge pipeline 8; pressing the straight-row backflushing key switch, and selecting a 'immediate starting' mode from two starting modes of 'immediate starting' and 'preset time starting', namely immediately starting a straight-row backflushing control program for each filter cartridge to be backflushed; the electric control device controls to close the discharge electric control valve and conducts the front water outlet electric control valve, and cleaning water containing impurities in the backflushing discharge pipeline enters the water inlet end of the front water outlet electric control valve and is discharged from the water outlet end of the backflushing discharge pipeline and the water purification pipeline or the pure water pipeline, so that the backflushing effect is visualized.

In the above embodiments, the "preset time" includes a preset time or a preset time period, that is, the "preset time" may be a preset certain time or a preset certain time period (time period). As determined by the electronic control device based on the configured clock. At some point in the future, or after a certain period of time, or at a designated time after a certain period of time, the in-line backflushing control program for each of the filter bladders to be backflushed is started.

During the process that the direct-exhaust recoil control circuit is started and runs the direct-exhaust recoil control program, the electric control device cannot start the running mode (the machine cannot run). And the electric control device automatically shifts to the state to be operated of the corresponding filtering channel after finishing the direct discharging back flushing control program.

Example 9. On the basis of the embodiments 1-8, a time length adjusting key is also arranged; the time length adjusting key adjusts and controls the timing length parameter in the direct-drainage back-flushing control program according to the water quality of the tap water entering the household.

Considering the difference of water quality of different water sources, the use effect of the same type of machine is different. Along with the running time of a machine filtering channel, the conditions that impurities trapped by a filter liner are different become more obvious, and the originally set timed long parameter is difficult to ensure to reach the back flushing effect of a water quality simulation experiment of an original factory according to the location, so that a water purifier adopting local water quality can have a better back flushing effect by properly adjusting the back flushing time.

In the above embodiments, the "preset time" may be a preset certain time, or a preset certain time period. Such as a remote control terminal, as represented by the manufacturer, determines the specified time of the specified date of each week or month or season, or the electronic control device determines it according to a clock configured after the machine has been activated. At some point in the future, or after some period of time, or at a designated time after some period of time, the in-line backflushing control program for each of the filter elements to be backflushed is started.

The 'independent reverse water washing one by one for a certain time length' refers to that for each filter container to be backflushed (including the filter container to be backflushed between the backflushing water inlet electric control valve and the backflushing water outlet electric control valve), a corresponding backflushing time period, namely 'fixed time length' (fixed time period), is set according to the structural condition of a filter material layer of the filter container. The reference backflushing time periods, namely the reference 'timing lengths' for the filter containers to be backflushed can be different or the same.

On the basis that the technical scheme of remotely and centrally controlling the backflushing is that the uniform backflushing time and interval are set for a water purifier user group with an electric control backflushing switching device, a user individual adjusts the fixed time length parameter through the time length adjusting key so as to be suitable for the water quality of the tap water entering the household, and the backflushing effect is better.

As an improvement, the preferred mode of "the time length adjusting key or adjusting and controlling the time length parameter in the direct discharging back flushing control program" is to preset the adjustment of the time length parameter to correspond to different water qualities, such as surface water quality with a conventional TDS value (corresponding to the "fixed time length" as a reference), underground water quality with a low TDS value (corresponding to a shorter time length), and high hardness water quality with a high TDS value (corresponding to a longer time length), so that a user can select the time length parameter through the time length adjusting key according to the use environment to realize the adjustment and control of the time length parameter.

The combination scheme of the embodiment and the embodiments 4, 6 and 7 is the best implementation mode of the scheme.

Example 10. On the basis of the embodiments 1, 2, 3, 4, 5, 6, 7, 8 and 9, the electric control device is provided with an exhaust switch for controlling and starting a preset exhaust control program; pressing the exhaust switch starts the exhaust control program of the electric control device: the electric control device conducts the related water passing electric control valves connected with the water inlet end or the water outlet end or the water inlet end and the water outlet end of each pre-arranged filter liner one by one in sequence for a short time, controls the inlet water of the water inlet pipeline to flow through one end or two ends of the pre-arranged filter liners and then flow out from the conducted tail end pipeline, and discharges the air in the pre-arranged filter liners and the related pipelines in the installation process of the pre-arranged filter liners; the end pipeline is either a water purification pipeline or a back flushing discharge pipeline; and the electric control device automatically switches to the to-be-operated mode after finishing the exhaust control program.

For the exhaust control procedure, the short time period is the time period which is far away from the fixed time period related to the direct exhaust recoil control procedure. The specific duration depends on the size of the filter liner and the filter material layer. In general, the "short duration" of the reference sets the duration in units of seconds, and is less than 30 seconds; the reference "fixed time length" sets the time length in units of minutes.

In view of the fact that air enters the filtering channel during the installation process of the filter container to influence the flow of water in the filtering channel, even to block the flow of water. Therefore, air must be vented to ensure proper operation of the machine.

The electric control device can conduct two electric control valves (a water inlet electric control valve or a backflushing water inlet electric control valve and a water outlet electric control valve) connected with each filter liner to be backflushed one by one according to the front and back arrangement sequence of each filter liner to be backflushed in the front filter channel, so that tap water in the water inlet pipeline of the engine base is led into the backflushing discharge pipeline and then is discharged by the subsequently conducted tail end pipeline. Air in a relevant water passing pipeline including a water port of the filter liner is discharged out of the machine in one or a combination of the following water passing modes:

when the path mode of the water inlet electric control valve and the first water outlet electric control valve positioned on the water inlet side of the first filter container to be backflushed is adopted, the air entering the water inlet side of the first filter container to be backflushed in the filter channel can be subjected to exhaust treatment.

In addition, when a path mode of the water inlet electric control valve and the second water outlet electric control valve (the water inlet side of the second filter container to be backflushed) is adopted, the air entering the water inlet side and the water outlet side of the first filter container to be backflushed in the filter channel can be subjected to exhaust treatment.

When a path mode of connecting a backflushing water inlet electric control valve and a backflushing water outlet electric control valve at the water inlet side and the water outlet side of a certain backflushing filter container to be backflushed is adopted, forward water passing can be carried out on a certain backflushing filter container to be in a filter channel, and air arranged at the water inlet side, the filter material layer and the water outlet side of a filter material layer of the backflushing filter container to be backflushed is exhausted. And so on.

When a path mode of connecting a water outlet electric control valve and a backflushing water inlet electric control valve at the water inlet side and the water outlet side of a certain to-be-backflushing filter container is adopted, a certain to-be-backflushing filter container entering a filter channel can be reversely passed through water, and air arranged between the water outlet side and the filter material layer of the to-be-backflushing filter container and the water inlet side is exhausted. The method is especially suitable for discharging the air at the water outlet side of the last filter container to be backflushed.

For the filtering backflushing mode or the combined mode of raw water backflushing and filtering backflushing, on the basis of the principle of the raw water backflushing mode exhaust channel, the electric control device can refer to the water path schematic diagrams shown in the attached figures 3-5 to control the related water passing electric control valve to extrude the air in the preposed filter liner and the pipeline by water flow and discharge the air out of the machine.

The end line is preferably a back flush drain line. For the model with the discharge pipeline, the backflushing discharge pipeline is connected with the discharge pipeline.

The selection and combination of the above exhaust path modes form a set of 'exhaust control program' for performing exhaust operation on the movable joint water port (including the filter liner water port) which switches the electric control valve for each connecting water path and can enter air. The switching control sequence is preferably from front to back, and the tap water pipe pressure of the water inlet pipeline is utilized to carry out water passing and air exhausting step by step. It should be noted that the "air discharge control program" is not limited to a reverse water passing path from the water outlet side to the water inlet side of the filter cartridge, and may also be a forward water passing path from the water inlet side to the water outlet side, or a water passing path that does not pass through the filter material layer of the filter cartridge.

Example 11. On the basis of the above embodiments 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, the base 22 is provided with an upper control module of a downward water passing pipeline of an upper butt joint water gap, a lower filter chamber of an upward water passing pipeline of a lower butt joint water gap, a loose joint device, and a detection switch; the upper control module is matched with the lower filter container bin up and down and is connected into a whole through a loose joint device, and the upper control module triggers the detection switch to give out corresponding detection and control signals: confirming that the upper control module is matched with the lower filter container bin up and down and connected into a whole through the loose joint device, and starting an exhaust control program of the electric control device after respective upper and lower butt joint water gaps of the two parts are butted in place.

The water purifier adopts a structure that an upper control module is matched with a lower filter liner bin up and down and is connected into a whole through a loose joint device, and the structure is an ideal base mode. In the above embodiments, the movable connection device is at least one of a swing locking device, a locking hook device, an elastic buckling device, a screwing structure or a thread structure, which are conventional technologies, and therefore, the details are not repeated in the present application.

In this embodiment, one or more of the following three structural modes may be selected in the filtration channel:

first filter channel connection mode:

the upper control module of the water purifier is provided with a water passing control part and a water passing pipeline communicated with the water passing control part and a downward upper butt joint water gap; the two-nozzle filter liner is provided with two upward filter liners which are butted with the nozzles downwards; when the upper control module is in upper and lower contact fit with the lower filter liner bin, the upward downward butt joint water gap of the filter liner is in mutual sealing butt joint with the downward upward upper plug-in water gap of the upper control module. Namely:

the upper part of the filter liner shell is provided with a filter liner with a 'two-way water feeding port' structure, and the filter liner shell is fixedly connected with a lower filter liner bin into a whole through a fastening device arranged at the lower part of the filter liner shell. The two upward downward butt joint water gaps of the filter liner are hermetically connected with the downward upward butt joint water gaps of the upper control module water passing pipeline to form a movable water passing pipeline of the filter channel.

Second filter channel connection mode:

the upper control module of the water purifier is provided with a downward upper butt joint water gap and a water passing pipeline; an upward lower butt joint water gap and a water passing pipeline are arranged on the bottom surface of the lower filter liner bin; the filter liner is respectively provided with an upward lower butt joint water gap and a downward upper butt joint water gap (namely a non-return water gap); after the filter liner is connected with the bottom surface of the lower filter liner bin through the fixing device, the downward upper butt joint water gap of the filter liner is mutually sealed and butted with the upward lower splicing water gap and the water passing pipeline of the bottom surface of the lower filter liner bin; when the upper control module is in upper and lower contact fit with the lower filter liner bin, the upward downward butt joint water gap of the filter liner and the downward upward plug-in water gap of the upper control module are mutually sealed and butted to form a movable water passing pipeline of the filter channel.

In this embodiment, the two structural modes of the liner water gap ("two-way upward water gap" and "different-way water gap") are both regarded as the structural modes of the liner water gap covered by the structural mode that each liner is hermetically connected with the downward upper butt water gap of the upper control module and the water passing pipeline connected with the water passing control component through the upward lower butt water gap arranged on the upper part.

Third filtration channel connection mode:

the filter liner connected in the filter channel comprises a filter liner with two water ports in the same direction, and is fixedly connected with a lower filter liner bin to form a whole through a fastening device arranged near the two water ports in the same direction. The two same-direction water openings of the filter liner belong to two downward upper butt joint water openings, are in sealed butt joint with an upward lower butt joint water opening of the bottom surface of the lower filter liner bin and are connected through a water passing pipeline on the bottom surface of the lower filter liner bin to form a filter channel.

The water flow line may be provided on the upper control module, on the bottom surfaces of the upper control module and the lower filter cartridge, or on the bottom surface of the lower filter cartridge, respectively, with reference to the three filter passage connection modes (the filter cartridges are regarded as the water flow line). When the first and second filtering channel connection modes are adopted, the water passing pipeline connecting the upper and lower butted water openings is a movable water passing pipeline.

For the three-nozzle filter liner, such as a reverse osmosis membrane or a nanofiltration membrane filter liner, it can be considered that a nozzle is additionally arranged on the basis of a 'two-way water feeding nozzle' or a 'non-return nozzle' in the first and second filter channel connection modes, or that a nozzle is additionally arranged on the basis of a two-way water feeding nozzle in the third filter channel connection mode.

With the first and second filter passage connection modes described above, each time the overhead control module is disengaged, a "blow-off problem" of the filter passage is encountered. Therefore, it is often necessary to use convenient technical means to cope with this.

Example 12. On the basis of the embodiment related to the reverse osmosis membrane filter cartridge and the modified embodiment thereof, the concentrated water discharge pipeline 21 of the reverse osmosis membrane filter cartridge 14 is connected with the discharge pipeline 8 and the backflushing discharge pipeline 8a through the water outlet end of the concentrated water discharge flow control device 21a, the water outlet end of the concentrated water discharge flow control device 21a is additionally connected with a concentrated water discharge recycling system (not shown) of a water storage tank provided with a water inlet electric control valve and a water return electric control valve, concentrated water discharged from the concentrated water discharge port of the reverse osmosis membrane filter cartridge is stored in the water storage tank, and at the moment, the electric discharge valve (not shown) additionally arranged on the discharge pipeline 8 is closed. The booster pump 10 intermittently pumps the concentrated discharge water in the water storage tank for secondary utilization through a water outlet pipeline of the water return electric control valve: after the booster pump pumps the concentrated drainage in the water storage tank through a water outlet pipeline of the backwater electric control valve so that the water level of the concentrated drainage is reduced to the lower limit, the electric control device closes the backwater electric control valve to control the booster pump to feed water from the communicated front-mounted filtering channel; and in the process of preparing pure water along with the reverse osmosis membrane filter liner, after the water level of the discharged concentrated water in the water storage tank correspondingly rises to an available range, the booster pump switches to extract the discharged concentrated water in the water storage tank to prepare water through the conducted return water electric control valve again and closes the front filtering channel, so that the water can be circularly and repeatedly operated.

When the recycled concentrated drainage water causes the TDS value of the water entering the reverse osmosis membrane filter container to be too high, the TDS value of the corresponding concentrated drainage water of the reverse osmosis membrane filter container is also correspondingly too high. At the moment, the electric control device controls to close the water inlet electric control valve and conduct the discharge electric control valve. The concentrated water discharged from the water outlet end of the concentrated water discharge flow control device is discharged out of the discharge pipeline 8 through the conductive discharge electric control valve.

The water inlet end of the booster pump 10 communicated with the front filtering channel can be connected with the water outlet of the water storage tank through a water return electric control valve and can also be connected with a water return pump arranged additionally through the water return electric control valve. The purified water pipeline 9 can be arranged at the water inlet end of the booster pump 10 or at the water outlet end of the booster pump.

When the water inlet end of the booster pump 10 is connected with the water outlet of the water storage tank through the water return electric control valve, the booster pump 10 pumps the concentrated discharge water at the water outlet of the water storage tank through the water return electric control valve, or supplies the water outlet end of the booster pump with a purified water pipeline (not shown) with a control valve or a reverse osmosis membrane filter liner.

When the water inlet end of the booster pump 10 is connected with the water outlet of the water storage tank through the water return electric control valve and an additionally arranged water return pump, the booster pump 10 pumps the concentrated discharge water at the water outlet of the water storage tank through the water return electric control valve and supplies the concentrated discharge water to the reverse osmosis membrane filter liner. The water return pump is used for supplying water to a water purification pipeline (not shown) with a control valve, which is communicated with a water inlet pipeline of the booster pump.

In the present case, the combination schemes of examples 2, 4, 5, 6, 7, 8 may be adopted, or the combination schemes of examples 3, 4, 5, 6, 7, 8 may be adopted, and the latter is preferable. At this time, the lower filter container cabin described in embodiment 6 adopts a U-shaped filter container cabin structure, and the void space between each filter container and the U-shaped filter container cabin structure is used as a water storage tank (cabin) and is provided with a water inlet and a water outlet which are respectively connected with the water inlet electric control valve and the water return electric control valve.

The nanofiltration membrane filter liner belongs to a branch of the reverse osmosis membrane filter liner. In the scheme, the reverse osmosis membrane filter liner can be a reverse osmosis membrane filter liner or a nanofiltration membrane filter liner.

As a further improvement of the above embodiments, the device further comprises a detection component for detecting the on or off of the purified water pipeline; the detection component is a water pressure switch, a flow sensor, a microswitch, a photoelectric switch or a circuit switch. Whether water flows through the water purification pipeline or not can be directly detected through a water pressure switch, a flow switch or a flow sensor to judge whether the water purification pipeline or the pure water pipeline is conducted or closed, whether a bearing control valve in the water purification pipeline is in a conducting or closed position or not can be detected through a micro switch, a photoelectric switch or a circuit switch, whether a circuit of an electric control valve is conducted or not is indirectly judged and detected, whether water flows through the water purification pipeline or not is judged and judged, and then a precondition is provided for starting a direct-discharge back-flushing control program in the process of implementing the technical scheme represented by the embodiment 1-4. The detection component and the detection and judgment method for the conduction or the closing of the related purified water pipeline or the purified water pipeline adopt the common knowledge technology.

Claims (10)

1. A remote switching method for a pre-filter liner filtering and back-flushing channel of a water purifier is characterized in that a base is provided with a water inlet pipeline, a water purifying pipeline, a discharge pipeline and an electric control device; a single filter material layer or a plurality of filter material layers are arranged on the filter liner to be backflushed as the front filter liner; the water inlet end and the water outlet end of the filter liner to be backflushed are respectively connected with a water inlet pipeline and a water purifying pipeline to form a preposed filtering channel; in addition, three water passing electric control valves including a water inlet electric control valve for controlling water inlet of the to-be-backflushed filter container, a backflush water inlet electric control valve for controlling reverse water passing of the to-be-backflushed filter container and a water outlet electric control valve are arranged around the to-be-backflushed filter container and connected with related water paths, wherein the water outlet end of the water inlet electric control valve and the water inlet end of the water outlet electric control valve positioned behind the water inlet electric control valve are communicated with the water inlet end of the to-be-backflushed filter container, and the water inlet end of the water outlet electric control valve which is connected with the water; the electric control device controls the water inlet electric control valve to be conducted and controls the backflushing water inlet electric control valve and the water outlet electric control valve to be closed to form a pre-filtering channel for forward water passing of the backflushing filter container; the electric control device controls the water inlet electric control valve to be closed and controls the backflushing water inlet electric control valve to be communicated with the water outlet electric control valve positioned in front of the to-be-backflushing filter liner at the same time, so that water is fed from the backflushing water inlet electric control valve and flows from the water outlet end of the to-be-backflushing filter liner to the water inlet end, then a backflushing channel for water is arranged at the water outlet end of the water outlet electric control valve and is additionally connected with a discharge pipeline at the water outlet end of the water outlet electric control valve, and the corresponding water passing mode is a raw water backflushing mode; the remote control terminal establishes communication with the electric control device connected with the direct discharge control recoil circuit through the internet communication receiving device and sends a control instruction signal to the electric control device; the electric control device receives the control instruction signal through the internet communication receiving device, or immediately or according to preset time, triggers a connected direct-discharge control backflushing circuit to start a direct-discharge backflushing control program aiming at the filter container to be backflushed: and under the condition that the preposed filtering channel is in the to-be-operated mode, the electric control device controls the water inlet electric control valve to be closed, and conducts the backflushing water inlet electric control valve and the water outlet electric control valve to carry out reverse water cleaning on the to-be-backflushed filtering container for a fixed time and discharge the to-be-backflushed filtering container through the conducted backflushing discharge pipeline until the reverse water cleaning of the to-be-backflushed filtering container is completed and then the to-be-operated mode is automatically switched back.

2. A remote switching method for a pre-filter liner filtering and back-flushing channel of a water purifier is characterized in that a base is provided with a water inlet pipeline, a water purifying pipeline, a discharge pipeline and an electric control device; the multiple preposed filter liners are sequentially connected in series to form a preposed filter channel, the head end and the tail end of the preposed filter channel are respectively connected with a water inlet pipeline and a water purification pipeline, and each preposed filter liner or part or all of the preposed filter liners are filter liners to be backflushed and need to be backwashed by water for cleaning; in addition, a plurality of water passing electric control valves including a water inlet electric control valve for controlling water passing of the pre-filtering channel, a backflushing water inlet electric control valve for controlling reverse water passing of the pre-filtering channel and a water outlet electric control valve are arranged around the to-be-backflushing filtering liner in the pre-filtering channel and connected with related water ways, wherein the water outlet end of the water inlet electric control valve and the water inlet end of the water outlet electric control valve positioned behind the water inlet electric control valve are communicated with the water inlet end of the to-be-backflushing filtering liner, the water outlet end of the backflushing water inlet electric control valve, which is interconnected with the water inlet electric control valve, of the water inlet end is connected with the water outlet end of the to-be-backflushing filtering liner, and the backfl; the electric control device controls the water inlet electric control valve to be conducted and controls the backflushing water inlet electric control valve and the water outlet electric control valve to be closed to form a preposed filtering channel for forward water passing of each preposed filtering container which is connected in series; the electric control device controls the closing of the water inlet electric control valve and controls the simultaneous conduction of a backflushing water inlet electric control valve behind a filter liner to be backflushed and a water outlet electric control valve in front of the filter liner to be backflushed, so that water is fed from the backflushing water inlet electric control valve and flows from the water outlet end of the backflushing water inlet electric control valve to the water inlet end through the connected water outlet end of the filter liner to be backflushing water inlet end, then the water outlet end of the water outlet electric control valve is additionally provided with a backflushing discharge pipeline connected with the water outlet end of each water outlet electric control valve and a backflushing channel for discharging water from the discharge pipeline, and the electric control device is characterized by also being provided with a remote control terminal, an internet communication receiving device which; the remote control terminal establishes communication with an electric control device connected with the direct discharge control recoil circuit through an internet communication receiving device and sends out a control instruction signal; the electric control device receives the control instruction signal through the internet communication receiving device, or immediately or according to preset time, triggers the connected direct-discharge recoil control circuit to start a direct-discharge recoil control program for each filter container to be recoiled: under the condition that the preposed filtering channel is in a to-be-operated mode, the electric control device controls the water inlet electric control valve to be closed and conducts the related backflushing water inlet electric control valve and the related backflushing water outlet electric control valve to carry out independent reverse water washing on each to-be-backflushing filter container for a certain time length in sequence and discharge the water from the conducted discharge pipeline until the reverse water washing on each to-be-backflushing filter container is completed and then automatically switched back to the to-be-operated mode; the corresponding reverse water passing mode is a raw water backflushing mode which controls a water inlet electric control valve at the head end of the prepositive filtering channel to be closed and controls a backflushing water inlet electric control valve at a water inlet end interconnected with the water inlet electric control valve and a water outlet electric control valve between the water inlet electric control valve and a filter liner to be backflushed to be conducted simultaneously, or a filtering backflushing mode which controls a water inlet electric control valve behind the prepositive filter liner to be closed and controls a backflushing water inlet electric control valve at a water inlet end interconnected with the water inlet electric control valve and a water outlet electric control valve between the water inlet electric control valve and the filter liner to be backflushed to be conducted simultaneously.

3. A remote switching method for a pre-filter liner filtering and backflushing channel of a water purifier is characterized in that a base is provided with a water inlet pipeline, a pure water pipeline, a discharge pipeline and an electric control device; the device comprises a reverse osmosis membrane filter liner, a plurality of filter liners, a water inlet pipeline, a water outlet pipeline and a water outlet pipeline, wherein the filter liners are sequentially connected in series to form a filter channel, the filter liners are positioned in front of the reverse osmosis membrane filter liner to form a pre-filter channel, the head end of the pre-filter channel is connected with the water inlet pipeline, and all or part of the pre-filter liners are to-be-backflushed filter liners needing to be backwashed and; the water inlet end of the reverse osmosis membrane filter liner is connected with the tail end of the preposed filtering channel through a booster pump, the water outlet pipeline of the reverse osmosis membrane filter liner is connected with a pure water pipeline, and the concentrated water discharge pipeline of the reverse osmosis membrane filter liner is connected with a discharge pipeline through a concentrated water discharge flow control device; in addition, a plurality of water passing electric control valves including a water inlet electric control valve for controlling water passing of the pre-filtering channel, a backflushing water inlet electric control valve for controlling reverse water passing of the pre-filtering channel and a water outlet electric control valve are arranged around the to-be-backflushing filtering liner in the pre-filtering channel and connected with related water ways, wherein the water outlet end of the water inlet electric control valve and the water inlet end of the water outlet electric control valve positioned behind the water inlet electric control valve are communicated with the water inlet end of the to-be-backflushing filtering liner, the water outlet end of the backflushing water inlet electric control valve, which is interconnected with the water inlet electric control valve, of the water inlet end is connected with the water outlet end of the to-be-backflushing filtering liner, and the backfl; the electric control device controls the water inlet electric control valve to be conducted and controls the backflushing water inlet electric control valve and the water outlet electric control valve to be closed to form a preposed filtering channel for positive water passing of each preposed filtering container which is connected in series and convey the water to the reverse osmosis membrane filtering container for water making through the booster pump; the electric control device controls the closing of the water inlet electric control valve and controls the simultaneous conduction of a backflushing water inlet electric control valve behind a filter liner to be backflushed and a water outlet electric control valve in front of the filter liner to be backflushed, so that water is fed from the backflushing water inlet electric control valve and flows from the water outlet end of the backflushing water inlet electric control valve to the water inlet end through the connected water outlet end of the filter liner to be backflushing water inlet end, then the water outlet end of the water outlet electric control valve is additionally provided with a backflushing discharge pipeline connected with the water outlet end of each water outlet electric control valve and a backflushing channel for discharging water from the discharge pipeline, and the electric control device is characterized by also being provided with a remote control terminal, an internet communication receiving device which; the remote control terminal establishes communication with an electric control device connected with the direct discharge control recoil circuit through an internet communication receiving device and sends out a control instruction signal; the electric control device receives the control instruction signal through the internet communication receiving device, or immediately or according to preset time, triggers the connected direct-discharge recoil control circuit to start a direct-discharge recoil control program for each filter container to be recoiled: under the condition that the preposed filtering channel is in a to-be-operated mode, the electric control device controls the water inlet electric control valve to be closed and conducts the related backflushing water inlet electric control valve and the related backflushing water outlet electric control valve to carry out independent reverse water washing on each to-be-backflushing filter container for a certain time length in sequence and discharge the water from the conducted discharge pipeline until the reverse water washing on each to-be-backflushing filter container is completed and then automatically switched back to the to-be-operated mode; the corresponding reverse water passing mode is a raw water backflushing mode which controls a water inlet electric control valve at the head end of the prepositive filtering channel to be closed and controls a backflushing water inlet electric control valve at a water inlet end interconnected with the water inlet electric control valve and a water outlet electric control valve between the water inlet electric control valve and a filter liner to be backflushed to be conducted simultaneously, or a filtering backflushing mode which controls a water inlet electric control valve behind the prepositive filter liner to be closed and controls a backflushing water inlet electric control valve at a water inlet end interconnected with the water inlet electric control valve and a water outlet electric control valve between the water inlet electric control valve and the filter liner to be backflushed to be conducted simultaneously.

4. A remote switching method for a pre-filter liner filtering and backflushing channel of a water purifier is characterized in that a base is provided with a water inlet pipeline, a pure water pipeline, a discharge pipeline and an electric control device; the device comprises a reverse osmosis membrane filter liner, a plurality of filter liners, a water inlet pipeline, a water outlet pipeline and a water outlet pipeline, wherein the filter liners are sequentially connected in series to form a filter channel, the filter liners are positioned in front of the reverse osmosis membrane filter liner to form a pre-filter channel, the head end of the pre-filter channel is connected with the water inlet pipeline, and all or part of the pre-filter liners are to-be-backflushed filter liners needing to be backwashed and; the water inlet end of the reverse osmosis membrane filter liner is connected with the tail end of the preposed filtering channel through a booster pump, the water outlet pipeline of the reverse osmosis membrane filter liner is connected with a pure water pipeline, and the concentrated water discharge pipeline of the reverse osmosis membrane filter liner is connected with a discharge pipeline through a concentrated water discharge flow control device; in addition, a plurality of water passing electric control valves including a water inlet electric control valve for controlling water passing of the pre-filtering channel, a backflushing water inlet electric control valve for controlling reverse water passing of the pre-filtering channel and a water outlet electric control valve are arranged around the to-be-backflushing filtering liner in the pre-filtering channel and connected with related water ways, wherein the water outlet end of the water inlet electric control valve and the water inlet end of the water outlet electric control valve positioned behind the water inlet electric control valve are communicated with the water inlet end of the to-be-backflushing filtering liner, the water outlet end of the backflushing water inlet electric control valve, which is interconnected with the water inlet electric control valve, of the water inlet end is connected with the water outlet end of the to-be-backflushing filtering liner, and the backfl; the electric control device controls the water inlet electric control valve to be conducted and controls the backflushing water inlet electric control valve and the water outlet electric control valve to be closed to form a preposed filtering channel for positive water passing of each preposed filtering container which is connected in series and convey the water to the reverse osmosis membrane filtering container for water making through the booster pump; the electric control device controls the closing of the water inlet electric control valve and controls the simultaneous conduction of a backflushing water inlet electric control valve behind a filter liner to be backflushed and a water outlet electric control valve in front of the filter liner to be backflushed, so that water is fed from the backflushing water inlet electric control valve and flows through a water outlet end of the filter liner to be backflushed to a water inlet end, then the water outlet end of the water outlet electric control valve is connected with a backflushing discharge pipeline of the water outlet end of each water outlet electric control valve and a backflushing channel for discharging water from the discharge pipeline, and the electric control device is characterized by also being provided with a remote control terminal, an internet communication receiving device which is connected with the remote control terminal and keeps internet networking communication, a direct-discharge control backflushing circuit which is provided with and starts an internet backflushing control program, and a second-stage water inlet electric control valve which is used for; the remote control terminal establishes communication with an electric control device connected with the direct discharge control recoil circuit through an internet communication receiving device and sends out a control instruction signal; the electric control device receives the control instruction signal through the internet communication receiving device, or immediately or according to preset time, triggers the connected direct-discharge recoil control circuit to start a direct-discharge recoil control program for each filter container to be recoiled: under the condition that the preposed filtering channel is in a to-be-operated mode, the electric control device controls the water inlet electric control valve to be closed and conducts the related backflushing water inlet electric control valve and the related backflushing water outlet electric control valve to carry out independent reverse water washing on each to-be-backflushing filter container for a certain time length in sequence and discharge the water from the conducted discharge pipeline until the reverse water washing on each to-be-backflushing filter container is completed and then automatically switched back to the to-be-operated mode; the corresponding reverse water passing mode is a combined mode of a raw water backflushing mode and a filtering backflushing mode: the electric control device controls a water inlet electric control valve at the head end of the prepositive filtering channel to be closed and controls a backflushing water inlet electric control valve at a water inlet end which is connected with the water inlet electric control valve and a water outlet electric control valve between the water inlet electric control valve and a preceding filter container to be backflushed to be conducted at the same time to form a raw water backflushing mode of the filter container to be backflushed at a preceding stage; the electric control device controls the water inlet electric control valve and the front filter container at the front stage to conduct forward water passing, controls the second-stage water inlet electric control valve behind the front filter container at the front stage to be closed, and controls the back backflushing water inlet electric control valve at the water inlet end connected with the second-stage water inlet electric control valve and the corresponding water outlet electric control valve behind the second-stage water inlet electric control valve and in front of the back-stage filter container to be backflushed to be conducted simultaneously in a filtering backflushing mode.

5. The remote switching method for the pre-filter liner filtering and backflushing channel of the water purifier as claimed in claim 2, 3 or 4, wherein the backflushing mode is set corresponding filtering backflushing mode for the second and third pre-filter liners to be backflushed in the series connected three pre-filter liners: the water inlet ends of the second and third stage backflushing water inlet electric control valves are connected with the water inlet ends of the second stage water inlet electric control valves in the pipeline between the first and second stage prepositive filter containers, the water outlet ends of the second and third stage backflushing water inlet electric control valves are respectively connected with the water outlet ends of the second and third stage filter containers to be backflushed, and the water inlet ends of the corresponding second and third stage water outlet electric control valves are respectively connected between the second stage water inlet electric control valve and the second stage filter container to be backflushing and the pipeline between the second and third stage filter containers to be backflushing; for the parallel-serial mode, the water inlet end of the later third stage backflushing water inlet electric control valve is connected with the water inlet end of the second stage water inlet electric control valve in a pipeline between the first stage and the second stage preposed filter containers, the water outlet end of the later third stage backflushing water inlet electric control valve is respectively connected with the water inlet end of the second stage backflushing water inlet electric control valve and the water outlet end of the third stage filter container to be backflushed, the water outlet end of the second stage backflushing water inlet electric control valve is connected with a pipeline between the second stage filter container and the third stage filter container to be backflushing water inlet end of the third stage water outlet electric control valve, and the water inlet end of; for the serial connection mode, the water inlet end of the second-stage backflushing water inlet electric control valve at the back is connected with the water inlet end of the second-stage water inlet electric control valve in a pipeline between the first-stage and second-stage preposed filter containers, the water outlet end of the second-stage backflushing water inlet electric control valve is respectively connected with the water inlet end of the third-stage backflushing water inlet electric control valve and the water outlet end of the second-stage filter container to be backflushed, and the third-stage water inlet electric control valve which is connected in series; the water outlet end of the third-stage backflushing water inlet electric control valve is connected with the water outlet end of the third-stage filter container to be backflushed 13; the water inlet ends of the corresponding second-stage water outlet electric control valve and the corresponding third-stage water outlet electric control valve are respectively connected between the second-stage water inlet electric control valve and the second-stage filter container to be backflushed and in a pipeline between the third-stage water inlet electric control valve and the third-stage filter container to be backflushed.

6. The remote switching method for the pre-filter liner filtering and backflushing channel of the water purifier as claimed in claim 1, 2, 3 or 4, wherein the remote terminal is set for the electric control device of each water purifier controlled by the remote terminal and sends out the same control command signal; the electric control device of each water purifier receives the control instruction signal through the internet communication receiving device which is configured for each water purifier, or immediately or according to preset time, the electric control device starts the direct-discharge backflushing control program aiming at each filter container to be backflushed which is controlled by each water purifier.

7. The remote switching method for the pre-filter liner filtering and backflushing channel of the water purifier as claimed in claim 1, 2, 3 or 4, characterized in that the electric control device is provided with a direct-discharge backflushing key switch for manually starting a direct-discharge backflushing control program; when the in-line backflushing key switch is pressed down, the electric control device starts an in-line backflushing control program aiming at each filter container to be backflushed immediately or according to preset time: the electric control device conducts the related backflushing water inlet electric control valve and the related water outlet electric control valve to carry out independent reverse water washing on each filter container to be backflushed for a certain time in sequence and discharge the filter containers through the discharge pipeline.

8. The remote switching method for the pre-filter liner filtering and backflushing channel of the water purifier as claimed in claim 7, wherein the backflushing discharge pipeline is connected with the end of the pre-filter channel or the pure water pipeline through a front water outlet electric control valve; an electric discharge valve is arranged in the discharge pipeline; pressing the straight-row backflushing key switch and selecting to immediately start a straight-row backflushing control program for each filter cartridge to be backflushed; the electric control device controls to close the discharge electric control valve and conducts the front water outlet electric control valve, and cleaning water containing impurities in the backflushing discharge pipeline is discharged from the purified water pipeline or the pure water pipeline through the front water outlet electric control valve.

9. The remote switching method for the pre-filter liner filtering and backflushing channel of the water purifier as claimed in claim 1, 2, 3, 4 or 8, characterized in that a time length adjusting button is further provided; the time length adjusting key adjusts and controls the timing length parameter in the direct-drainage back-flushing control program according to the water quality of the tap water entering the household.

10. The remote switching method for the pre-filter liner filtering and backflushing channel of the water purifier as claimed in claim 1, 2, 3, 4 or 8, characterized in that the electric control device is provided with an exhaust switch for controlling and starting a preset exhaust control program; pressing the exhaust switch starts the exhaust control program of the electric control device: the electric control device conducts the related water passing electric control valves connected with the water inlet end or the water outlet end or the water inlet end and the water outlet end of each pre-arranged filter liner one by one in sequence for a short time, controls the inlet water of the water inlet pipeline to flow through one end or two ends of the pre-arranged filter liners and then flow out from the conducted tail end pipeline, and discharges the air in the pre-arranged filter liners and the related pipelines in the installation process of the pre-arranged filter liners; the end pipeline is either a water purification pipeline or a back flushing discharge pipeline; and the electric control device automatically switches to the to-be-operated mode after finishing the exhaust control program.

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