CN117623452A - Water purification unit waterway system and water purification unit - Google Patents

Abstract

The invention discloses a waterway system and water purifying equipment, wherein the waterway system comprises an integrated composite filter element, and a water storage component is arranged in the composite filter element; a reverse osmosis filter element; a water inlet assembly; the reflux assembly is used for conducting or cutting off the third waterway; the waterway system is provided with a first reflux mode and a second reflux mode; when in the first backflow mode, the water inlet assembly and the backflow assembly are opened; when the water storage component is in the second backflow mode, the water inlet component is closed, the backflow component is opened, the water storage component is elastically reset, and water in the water storage component jointly enters the reverse osmosis filter element through the water inlet end and the water outlet end of the reverse osmosis filter element. According to the technical scheme, the TDS value of water retained in the waterway system is reduced, so that the first cup of water has a lower TDS value when the waterway system integrally prepares water again.

Description

Water purification unit waterway system and water purification unit

Technical Field

The invention relates to the field of water purifying equipment, in particular to a water purifying equipment waterway system and water purifying equipment.

Background

The water purifying equipment is used in producing clean water and is used in drinking, chemical, medical, cultivation, planting, food, beverage, etc.

In the existing water purifying equipment, a filter element is commonly used for filtering water, and in order to reduce the whole volume of the water purifying equipment, filter elements with different functions are integrated and combined into a whole, and the used composite filter element is generally a 3-level or 4-level filter element; the composite filter element generally comprises a front filter element for filtering large particles such as floccules, a reverse osmosis filter element for reducing the concentration of salt ions in water and filtering microorganisms, and a rear filter element for improving the taste of purified water.

However, when the water purifying apparatus stops operating, water which has entered the water purifying apparatus remains in the flow path of the water purifying apparatus; when the reverse osmosis filter element is in a static state, the ion concentration at two sides of the reverse osmosis filter element tends to be balanced, namely, the ion concentration of pure water which remains in the reverse osmosis filter element and is filtered by the reverse osmosis filter element is increased (the ion concentration is called TDS too high in the field of water purifying equipment), so that when a user takes water again, the TDS value of first cup of water is too high.

Disclosure of Invention

The invention mainly aims to provide a waterway system, which aims to reduce the TDS value of first cup water when the waterway system is used for preparing water again.

To achieve the above object, the present invention provides a waterway system comprising

The integrated composite filter core comprises a front filter core and a rear filter core, and a water storage component is arranged in the composite filter core;

a first waterway is arranged between the water inlet end of the reverse osmosis filter element and the water outlet end of the front filter element, a second waterway is arranged between the water outlet end of the reverse osmosis filter element and the water inlet end of the rear filter element, and the water storage component is communicated with the second waterway;

the water inlet assembly is used for conducting or cutting off the first waterway;

a third waterway for conducting the first waterway and the second waterway;

the reflux assembly is used for conducting or cutting off the third waterway;

when the water outlet end of the rear filter element is closed, the waterway system is provided with a first backflow mode and a second backflow mode;

when in the first backflow mode, the water inlet assembly and the backflow assembly are opened;

when the water storage component is in the second backflow mode, the water inlet component is closed, the backflow component is opened, the water storage component is elastically reset, and water in the water storage component jointly enters the reverse osmosis filter element through the water inlet end and the water outlet end of the reverse osmosis filter element.

Alternatively/in one embodiment, the water storage assembly deforms to store water when the water inlet assembly is opened.

Alternatively/in an embodiment, when the water circuit is in the first return mode, water is re-introduced into the reverse osmosis cartridge via the third water circuit and the first water circuit.

Alternatively/in an embodiment, when the water circuit is in the second backflow mode, water in the water storage component enters the reverse osmosis filter element together through the second water circuit and the first water circuit.

Alternatively/in one embodiment, the post-cartridge has a water outlet chamber in communication with the post-cartridge outlet end, and the water storage assembly is in communication with the water outlet chamber.

Alternatively/in an embodiment, the water storage component comprises an elastic member, and the elastic member deforms under the pressure of water flow when the water inlet component is opened to store water.

Alternatively/in an embodiment, the elastic member is an air bag, and an inner cavity of the air bag is communicated with the water outlet cavity.

Alternatively/in an embodiment, the water inlet assembly comprises a water inlet valve and a water inlet pump, two ends of the water inlet valve are respectively communicated with the water inlet pump and the pre-filter element, and the water outlet end of the water inlet pump is communicated with the reverse osmosis filter element.

Alternatively/in an embodiment, the return assembly comprises a return valve for switching on or off the third waterway.

Optionally/in an embodiment, the backflow assembly further comprises a first one-way valve, a water outlet end of the first one-way valve communicating with a water inlet end of the backflow valve.

Alternatively/in one embodiment, the water inlet end of the first one-way valve communicates with the water outlet end of the reverse osmosis cartridge and the water inlet end of the post-cartridge.

Alternatively/in one embodiment, the outlet end of the return valve communicates with the inlet end of the inlet valve.

The invention also provides water purifying equipment, which comprises the waterway system

According to the technical scheme, the water storage component is adopted to flush the inside of the reverse osmosis filter element from the water inlet end and the water outlet end of the reverse osmosis filter element, and two backflow modes are set to flush the reverse osmosis filter element, so that water which is not filtered by the reverse osmosis filter element can be diluted or even discharged by using water which is filtered by the reverse osmosis filter element, the ion concentration of the water which is not filtered by the reverse osmosis filter element is reduced, namely the TDS value of water which is retained in a waterway system is reduced, and the first cup of water has a lower TDS value when the waterway system integrally prepares water again.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall waterway flow during water production of the waterway system of the present invention;

FIG. 2 is a schematic diagram of the flow direction of return water when the water inlet valve is opened in embodiment 1 of the waterway system of the present invention;

FIG. 3 is a schematic diagram of the flow direction of return water when the water inlet valve is closed in embodiment 1 of the waterway system of the present invention;

FIG. 4 is a schematic diagram of the overall backwater flow in embodiment 2 of the waterway system of the present invention;

FIG. 5 is a schematic diagram illustrating the flow of backwater in embodiment 2 of the waterway system of the present invention;

FIG. 6 is a schematic cross-sectional view of a composite cartridge of the present invention;

FIG. 7 is a schematic diagram of the overall backwater flow in embodiment 3 of the waterway system of the present invention;

FIG. 8 is a schematic diagram of the flow direction of the backwater in embodiment 3 of the waterway system of the present invention.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a waterway system which is applied to water purifying equipment to finish the purification of water in the water purifying equipment, and the waterway system is further described below with reference to the accompanying drawings; wherein the direction indicated by the arrow in the figure is the water flow direction.

Referring to fig. 1 and 6, the waterway system according to the present invention includes a composite filter element 100 and a reverse osmosis filter element 200; the composite filter element 100 comprises a pre-filter element 120 and a post-filter element 130, and the pre-filter element 120 and the post-filter element 130 in the composite filter element 100 are integrally arranged, namely the single component of the composite filter element 100 comprises the pre-filter element 120 and the post-filter element 130; the integrated arrangement of the composite filter element 100 effectively reduces the occupied volume of the whole waterway system, thereby facilitating the miniaturized arrangement of the water purifying equipment, further reducing the occupied space of the water purifying equipment and widening the application environment and the scene of the water purifying equipment.

Total dissolved solids (English: total dissolved solids, abbreviated TDS), also known as total dissolved solids, measured in milligrams per liter (mg/L), which indicates how much milligrams of dissolved solids are dissolved in 1 liter of water. The higher the TDS value, the more dissolved substances contained in the water.

Referring to fig. 1 and 6, in the composite filter element 100, a pre-filter element 120 is used to filter impurities such as particles and flocs contained in water flow; the post-filter 130 further filters the water before it exits the water purification device to improve the mouthfeel of the water stream. After entering the water purifying device, the water flows through the pre-filter element 120, the reverse osmosis filter element 200 and the post-filter element 130 in sequence; the pre-filter 120 filters out particulates and flocs contained in the water; the reverse osmosis filter 200 utilizes the characteristic to filter out salt ions in water so as to reduce the salt ion concentration in water; the post filter 130 improves the taste of the water; thereby completing the water purifying process.

Referring to fig. 1 and 6, when a user needs to take water, water flows through the water purifying device to finish the purifying process, and then flows out of the water purifying device for the user to use; after the user finishes taking water, the water purifying equipment is turned off; the water path in the water purifying device is controlled to be opened and closed by the valve, so that the water path in the water purifying device is still filled with water after the water purifying device is closed, namely the reverse osmosis filter element 200 is also filled with water; the reverse osmosis filter core 200 mainly utilizes a reverse osmosis filter membrane to filter water, and the reverse osmosis filter membrane utilizes different molecular sizes under the condition that pressure difference exists at two sides of the membrane, so that after a user stops taking water, a water pump for pressurizing water in the water purifying equipment stops along with the water pump, the two sides of the reverse osmosis filter membrane do not have pressure difference any more, and after a period of standing, the ion concentration at the two sides of the reverse osmosis filter membrane tends to be balanced; when a user gets water again, the water flowing out of the water purifying device just after starting is the water filled in the waterway last time, so that the water with high ion concentration also flows out of the reverse osmosis filter element 200 to be used by the user, and the TDS value of the first cup of water is too high, namely the problem of 'first cup of water' in the industry is caused.

Referring to fig. 1 and 6, the present invention provides a waterway system, which can reduce the problem of too high TDS value of the first cup of water when the water purifying device is discharged again after a period of time. Specifically, the waterway system provided by the invention comprises the integrated composite filter element 100, the reverse osmosis filter element 200, the water inlet assembly 300 and the reflux assembly 400, wherein the composite filter element 100 comprises a front filter element 120 and a rear filter element 130; the water inlet end of the front filter element 120 is connected with the water inlet pipeline of the water purifying device, so as to pour external unfiltered water into the waterway system and filter particles and floccules in the water at the same time, the water outlet end of the front filter element 120 is communicated with the water inlet end of the reverse osmosis filter element 200, the water outlet end of the reverse osmosis filter element 200 is communicated with the water inlet end of the rear filter element 130, the water outlet end of the rear filter element 130 is communicated with valves such as a faucet 630 outside the water purifying device, and the valves such as the faucet 630 outside the water purifying device can control the operation of the whole waterway system; specifically, a first waterway 500a is arranged between the water inlet end of the reverse osmosis filter element 200 and the water outlet end of the front filter element 120, the first waterway 500a is used for communicating the front filter element 120 and the reverse osmosis filter element 200, a second waterway 500b is arranged between the water outlet end of the reverse osmosis filter element 200 and the water inlet end of the rear filter element 130, and the second waterway 500b is used for communicating the reverse osmosis filter element 200 and the rear filter element 130; a third water channel 500c is further provided between the first water channel 500a and the second water channel 500b, and the third water channel 500c is used for conducting the first water channel 500a and the second water channel 500b, so that the water filtered by the reverse osmosis filter cartridge 200 can be returned to the reverse osmosis filter cartridge 200 through the third water channel 500 c.

Referring to fig. 1 and 6, accordingly, the water inlet assembly 300 is disposed in the first water path 500a, so that the water inlet assembly 300 can cut off or conduct the first water path 500a and can pressurize the water in the first water path 500a to manufacture a pressure difference required at both sides of the reverse osmosis membrane in the reverse osmosis cartridge 200; the backflow assembly 400 is disposed in the third water path 500c, so that the backflow assembly 400 can cut off or conduct the third water path 500c, and the backflow assembly 400 can control whether the water filtered by the reverse osmosis filter element 200 can return to the reverse osmosis filter element 200.

Specifically, the water inlet assembly 300 includes a water inlet valve 310 and a water inlet pump 320, wherein two ends of the water inlet valve 310 are respectively communicated with the water inlet pump 320 and the pre-filter element 120, and a water outlet end of the water inlet pump 320 is communicated with the reverse osmosis filter element 200; namely, according to the flow path of water, when the water enters the first waterway 500a after being filtered by the pre-filter 120, the water sequentially passes through the water inlet valve 310 and the water inlet pump 320 and then enters the reverse osmosis filter 200; the water inlet valve 310 controls the on state of the first waterway 500a, i.e. the water inlet valve 310 can control the on or off of the first waterway 500a, thereby controlling the water inlet of the whole waterway; the water inlet pump 320 pressurizes the water flowing into the first water path 500a, so that a pressure difference is produced on both sides of the reverse osmosis membrane in the reverse osmosis filter element 200, so as to ensure the filtering effect of the reverse osmosis filter element 200 on solutes such as salt ions in the water.

Referring to fig. 1 and 6, the backflow assembly 400 includes a backflow valve 410, two ends of the backflow valve 410 are respectively connected with the first water channel 500a and the second water channel 500b, and the backflow valve 410 can control the conducting state of the third water channel 500 c; accordingly, in order to enable the water in the third water path 500c to flow unidirectionally, the backflow assembly 400 further includes the first check valve 420, and when the backflow valve 410 is opened, the first check valve 420 enables the water in the second water path 500b to flow into the first water path 500a through the third water path 500c, and the water in the first water path 500a cannot enter into the second water path 500b through the third water path 500c, so that the backflow effect of the third water path 500c and the backflow assembly 400 is ensured, and the possibility that the water flows out without being filtered by the reverse osmosis filter element 200 is reduced; both the return valve 410 and the first check valve 420 are disposed on the third waterway 500c, and when the water flows from the second waterway 500b through the third waterway 500c into the first waterway 500a, the water flows through the first check valve 420 and the return valve 410 in sequence.

Therefore, the unfiltered raw water enters the pre-filter element 120 of the composite filter element 100 after entering the water purifying device, and enters the first waterway 500a through the water outlet end of the pre-filter element 120 after being filtered by the pre-filter element 120, and the water inlet valve 310 and the water inlet pump 320 on the first waterway 500a are both opened; the water inlet valve 310 controls the conduction of the first waterway 500a, and the water pump 320 pressurizes the water in the first waterway 500a to meet the water inlet pressure requirement of the reverse osmosis filter element 200, and can also provide power for the whole waterway; the water in the first waterway 500a sequentially flows through the water inlet valve 310 and the water inlet pump 320, and then enters the reverse osmosis cartridge 200; after entering the reverse osmosis filter element 200, the water is filtered by the reverse osmosis filter element 200, and the water filtered by the reverse osmosis filter element 200 enters the second waterway 500b through the water outlet end of the reverse osmosis filter element 200; at this time, the return valve 410 is closed, so that water can only flow through the second waterway 500b to the rear filter element 130, and then flows out of the water purifying device after being filtered by the rear filter element 130; the user can then take water through a valve such as the faucet 630.

Referring to fig. 1 and 6, accordingly, wastewater is generated during the filtration of the reverse osmosis filter element 200, that is, the reverse osmosis filter element 200 is further provided with a wastewater end for discharging wastewater generated during the filtration of the reverse osmosis filter element 200; the waste water end is communicated with a waste water waterway 210 for discharging waste water; the wastewater waterway 210 is communicated with the outside of the water purifying device, in particular, the wastewater waterway 210 can be communicated with specific pipelines such as a sewer and the like, so that the wastewater can be directly discharged; in order to maintain the water flow pressure in the reverse osmosis filter element 200 and to improve the water filtration efficiency as much as possible and reduce the discharge of waste water, the waste water waterway 210 is provided with a waste water valve 220, and the waste water valve 220 discharges waste water in a dripping way under high water pressure, so that the waste water valve 220 can ensure the water pressure in the reverse osmosis filter element 200, the two sides of the reverse osmosis filter membrane in the reverse osmosis filter element 200 have pressure difference, and the normal filtration of water is ensured; and the arrangement of the waste water valve 220 can lead most of water to be filtered through the reverse osmosis filter membrane, thereby improving the filtering efficiency of the water.

The water enters the post filter element 130 after being filtered by the reverse osmosis filter element 200, and is discharged after being filtered by the post filter element 130; specifically, the water outlet end of the rear filter element 130 is communicated with a water outlet channel 600, and the water outlet channel 600 is used for communicating the water outlet end of the rear filter element 130 with valves such as a tap 630 and the like outside the water purifier; correspondingly, in order to ensure that the water outlet is smoothly carried out, namely, in order to ensure that the water can only flow out of the water purifying equipment along the water outlet pipeline, a second one-way valve 610 is arranged on the book outlet pipeline, and the second one-way valve 610 is arranged so that the water flow can only be discharged along the water outlet pipeline and cannot flow back into the rear filter element 130; correspondingly, in order to control the operation state of the whole flow path in cooperation with the opening and closing of external valves such as the faucet 630, a high-voltage switch 620 is further arranged on the water outlet pipeline; when external valves such as the faucet 630 are closed, the whole waterway system still produces water, so that the pressure in the water outlet pipeline is continuously increased; when the pressure increases to a certain value, the high-voltage switch 620 is triggered, the high-voltage switch 620 controls the power-on state of the whole flow path, so that when the high-voltage switch 620 is triggered, the whole flow path is powered off, and the high-voltage switch 620 is arranged to enable the whole flow path to be matched with the opening and closing of external valves such as the faucet 630 to control the water-making state; when the external valve such as the faucet 630 is opened again, the pressure in the water outlet line is released, the high-pressure switch 620 is turned on, and the entire flow path is energized to continue purifying the water.

The above is a description of the overall flow path water making process, and the following will be described with reference to the above description, in order to solve the problem of "first cup water" by describing the change of water in the overall waterway after the external valve such as the faucet 630 is closed.

Example 1

In an embodiment of the present invention, the water filtered by the reverse osmosis filter element 200 may be reintroduced into the reverse osmosis filter element 200 through the water inlet end of the reverse osmosis filter element 200, specifically as follows:

referring to fig. 2 and 3, the tap 630 on the water purifying apparatus is turned off, and the pressure in the water outlet path 600 is continuously increased so that the high-voltage switch 620 is triggered; after the high-pressure switch 620 is triggered, the return valve 410 is opened, and the water inlet pump 320 and the water inlet valve 310 are still opened for a period of time; after the faucet 630 is closed, the water outlet end of the post-filter 130 is plugged, and at this time, the return valve 410 and the water inlet valve 310 are both in an open state, and the water inlet pump 320 is still running; raw water enters the first waterway 500a after being filtered by the pre-filter element 120, flows into the first waterway 500a through the water inlet valve 310, enters the reverse osmosis filter element 200 after being pressurized by the water inlet pump 320, and enters the second waterway 500b after being filtered by the reverse osmosis filter element 200; because the post-filter element 130 cannot discharge water, that is, the water inlet end of the post-filter element 130 is blocked, the water in the second water channel 500b can enter the third water channel 500c, the water sequentially passes through the first one-way valve 420 and the reflux valve 410 in the third water channel 500c and returns to the first water channel 500a, and under the action of the first one-way valve 420, the water can only flow from the second water channel 500b to the first water channel 500a; thus, water filtered through the reverse osmosis cartridge 200 may be re-entered into the reverse osmosis cartridge 200 through the water inlet end of the reverse osmosis cartridge 200.

When the water filtered by the reverse osmosis cartridge 200 is called pure water and the water not filtered by reverse osmosis is called raw water, the pure water is mixed with the raw water when the pure water is re-introduced into the first waterway 500a, and thus the ion concentration of the raw water is lowered; with the continuous operation of the water inlet pump 320, the volume of water that can be contained in the integral waterway is fixed, which is equivalent to the fact that when the faucet 630 is closed, the water that remains in the integral waterway and is not filtered by the reverse osmosis filter element 200 is filtered by the reverse osmosis filter element 200; with the continuous operation of the water inlet pump 320, the pure water concentration at the water inlet end of the reverse osmosis cartridge 200 is continuously increased, and thus the ion concentration at the water inlet end of the reverse osmosis cartridge 200 is continuously decreased.

Referring to fig. 2 and 3, it should be noted that, after the water inlet pump 320 is operated for a period of time, the water inlet valve 310 may be closed, and the water inlet pump 320 is still in an operating state, so that the water in the reverse osmosis filter element 200 is in a continuous circulation process, and the ion concentration at the water inlet end of the reverse osmosis filter element 200 is further reduced; and as the reverse osmosis cartridge 200 is continuously filtered, more water with high ion concentration is discharged through the waste water valve 220, so that the ion concentration of the water at the water inlet end of the reverse osmosis cartridge 200 is further reduced; thus, when the user turns on the tap 630 again, i.e., the whole waterway re-produces water, the ion concentration at both sides of the reverse osmosis cartridge 200 is at an extremely low level, thereby solving the "first cup" problem.

Referring to fig. 2 and 3, and in order to accomplish the above-mentioned arrangement, one end of the third waterway 500c is actually connected between the water outlet end of the water inlet valve 310 and the water inlet end of the water inlet pump 320, that is, the water outlet end of the return valve 410 is connected between the water outlet end of the water inlet valve 310 and the water inlet end of the water inlet pump 320, when water flows back to the first waterway 500a through the third waterway 500c, it does not pass through the water inlet valve 310 any more, but can be continuously pressurized by the water inlet pump 320; accordingly, the other end of the third waterway 500c is communicated between the water outlet end of the reverse osmosis cartridge 200 and the water inlet end of the rear filter cartridge 130, that is, the water inlet end of the first check valve 420 is communicated between the water outlet end of the reverse osmosis cartridge 200 and the water inlet end of the rear filter cartridge 130, so that when the water outlet end of the rear filter cartridge 130 is closed, the water filtered by the reverse osmosis cartridge 200 can enter the first waterway 500a through the third waterway 500c,

in addition, the operation duration of the water inlet pump 320, the opening duration of the water inlet valve 310 and the opening duration of the backflow valve 410 can be set by one sentence of the actual water flow in the waterway and the volume of the reverse osmosis filter element 200; and, in the above description, the descriptions of "raw water" and "pure water" are merely for convenience in distinguishing between water before and after filtration by the reverse osmosis cartridge 200. For convenience of the following description, the waterway process in embodiment 1 is simply referred to as "mode a" or "first reflux mode", and the mode a herein is merely for convenience of the following description, and is not otherwise specified.

Example 2

In another embodiment of the present invention, the water filtered by the reverse osmosis filter element 200 may be reintroduced into the reverse osmosis filter element 200 through the water inlet end of the reverse osmosis filter element 200, specifically as follows:

referring to fig. 4 to 6, the waterway system according to the present invention further includes a water storage component 150, wherein the water storage component 150 is communicated with the second waterway 500b, and the water storage component 150 is deformed by the pressure of water when the water inlet component 300 is opened to store water, i.e. the water storage component 150 can purify the water in the whole waterway, and the water is filtered by the reverse osmosis filter element 200; when the faucet 630, the water inlet pump 320, the return valve 410 and the water inlet valve 310 are simultaneously closed, the water storage assembly 150 will have a tendency to recover the natural state, so that the water storage assembly 150 will drain the water therein, and the water drained from the water storage assembly 150 will flow back in the second waterway 500b, and then return to the reverse osmosis filter element 200 again through the water outlet end of the reverse osmosis filter element 200; when the water flow returns to the reverse osmosis filter element 200, a pressure difference is produced at both sides of the reverse osmosis filter membrane, so that pure water reversely passes through the reverse osmosis filter membrane to be mixed with raw water, thereby diluting the raw water and reducing the ion concentration of the raw water; and the wastewater end of the reverse osmosis filter element 200 is still draining, so that more raw water is extruded out of the reverse osmosis filter element 200 through the wastewater end under the condition of pressure, the ion concentration of water at the water inlet end of the reverse osmosis filter element 200 is further reduced, and the problem of first cup of water is solved.

Referring to fig. 4 to 6, accordingly, the water storage assembly 150 communicates with the second waterway 500b, and the above-mentioned return arrangement can be accomplished when the water storage assembly 300 is closed and the water can be discharged; in this embodiment, to reduce the space occupied by the overall waterway system in the water purifying apparatus, the water storage assembly 150 is disposed in the composite filter element 100; this arrangement increases the overall volume of the composite filter element 100, but increases the integration of the overall waterway system, thereby reducing the space occupied by the overall waterway system.

Specifically, the post-filter element 130 has a water outlet cavity 131, the water outlet cavity 131 is communicated with the water outlet end of the post-filter element 130, and the water storage component 150 is communicated with the water outlet cavity 131; thus, when the water storage assembly 150 is discharged like the second waterway 500b, water will pass through the water outlet chamber 131 of the post-filter 130, and then pass through the post-filter 130 to flow back into the second waterway 500b via the water inlet end of the post-filter 130.

Referring to fig. 6, in the present embodiment, the composite filter element 100 includes a bottle body 110, a pre-filter element 120, a partition 140 and a post-filter element 130, a top cover 160 is disposed on the bottle body 110, the pre-filter element 120, the partition 140 and the post-filter element 130 are all disposed in the bottle body 110, and the bottle body 110, the pre-filter element 120, the partition 140 and the post-filter element 130 are all coaxially disposed; the partition 140 is cylindrical, and the partition 140 divides the filter flask into three chambers for respectively accommodating the pre-filter element 120, the post-filter element 130 and the water storage component 150; wherein the pre-filter cartridge 120 is disposed between the partition 140 and the inner wall of the filter flask, the post-filter cartridge 130 is disposed within the partition 140, and the length of the partition 140 is less than the length of the flask 110, such that the water storage module 150 is available between the partition 140 and the top cap 160 of the filter flask; specifically, the water storage assembly 150 includes a water storage tank 151 and an elastic member 152, the elastic member 152 is disposed in the water storage tank 151, and when water flows into the water storage tank 151, the elastic member 152 is expanded by the pressure of the water; specifically, the partition 140 is provided with a through hole 141, the through hole 141 is communicated with the water outlet cavity 131, and the water storage tank 151 is hermetically connected with the through hole 141, so that the inner cavity of the water storage tank 151 is communicated with the water outlet cavity 131; the elastic member 152 is disposed in the water storage tank 151, so that the elastic member 152 is expanded by the pressure of the water flow when the water flow enters the water storage tank 151.

Further, the elastic member 152 is an air bag 152a, and the inner cavity of the air bag 152a is communicated with the water outlet cavity 131, so that the air bag 152a can expand when the air bag 152a is filled with water, and water storage is completed; it should be noted that, the inner cavity of the air bag 152a and the water outlet cavity 131 may be sealed, so that when water enters the water storage tank 151, the air bag 152a may shrink, and water storage may be completed; in addition, water storage may be accomplished within the water storage tank 151 by other means, such as springs and pressure plates; the pressing plate can move in the water storage tank 151 in a sealing way, and the moving direction of the pressing plate is parallel to the water flow direction in the water outlet cavity 131; the spring is arranged between the tank body of the water storage tank 151 and the pressing plate; when the pressure plate is impacted by water flow, the pressure plate moves in the water storage tank 151, and the spring is compressed under force; when the water inlet assembly 300 is closed, the spring release forces the pressing plate to move reversely, so that the pressing plate can discharge the water in the water storage tank 151, thereby completing the reverse flow of the water in the second waterway 500 b.

The top cover 160 is convenient for installing the partition 140, the pre-filter 120, the post-filter 130 and the water storage assembly 150 into the filter flask, and the top cover 160 can be fixed on the flask 110 after the whole structure is installed.

For convenience of the following description, the waterway process in embodiment 2 is simply referred to as "mode B", and the mode B is merely for convenience of the following description and has no other specific meaning.

Example 3

In yet another embodiment of the present invention, the water filtered by the reverse osmosis filter element 200 may be reintroduced into the reverse osmosis filter element 200 through the water inlet end of the reverse osmosis filter element 200, as follows:

on the basis of the above embodiments 1 and 2, this embodiment further provides a waterway arrangement for returning the water filtered by the reverse osmosis filter element 200 to the reverse osmosis filter element 200.

Referring to fig. 7 and 8, when the water inlet assembly 300 is opened, the water storage assembly 150 still receives the pressure of water to store water; however, when the water inlet assembly 300 is closed, the return valve 410 is opened, that is, the water in the water storage assembly 150 flows back to the second water path 500b, part of the water flows back to the water outlet end of the reverse osmosis filter element 200 through the second water path 500b, and the other part of the water enters the water inlet end of the reverse osmosis filter element 200 through the third water path 500c and the first water path 500a, that is, pure water enters both the water inlet end and the water outlet end of the reverse osmosis filter element 200, so as to dilute the raw water, and part of the raw water can be extruded out of the waste water valve 220, so that the ion concentration of the raw water at the water inlet end of the reverse osmosis filter element 200 is reduced, and the problem of first cup water is solved.

For convenience of the following description, the waterway process in embodiment 2 is simply referred to as "mode C" or "second reflux mode", and mode C herein is merely for convenience of the following description, and is not otherwise specified.

The three modes in embodiment 1, embodiment 2 and embodiment 3, namely mode a, mode B and mode C, are combined to further explain the specific arrangement of the waterway system proposed by the present invention.

In order to further reduce the ion concentration of the raw water at the reverse osmosis filter element 200 after stopping the water production of the whole waterway, or to reduce the proportion of the raw water at the water inlet end of the reverse osmosis filter element 200, the above three modes can be combined.

Specifically, when the user turns off the faucet 630, all three modes can be operated independently or in combination; for example, when the user closes the faucet 630, the inlet valve 310, the inlet pump 320, and the return valve 410 are opened, mode a of operation; when the intake pump 320 is off, mode B and/or mode C may be operated; in the state of operating at least two modes, there are a mode A-mode B, a mode A-mode C, a mode A-mode B-mode C, a mode A-mode C-mode B, a mode B-mode C and a mode C-mode B according to the operation sequence

It should be emphasized that mode a does not have to operate first, i.e., when the faucet 630 is closed, the inlet valve 310 and the inlet pump 320 may be closed simultaneously to operate mode B or mode C or a combination of mode B and mode C; after a period of time, simultaneously opening the water inlet valve 310 and the water inlet pump 320 to operate in a mode A; however, after mode a operation is completed, either mode B or mode C or a combination of both will necessarily be operated again because water is stored in the water storage assembly 150 due to the pressurization of the water by the water inlet pump 320. The independent implementation or each combination mode of the three modes can effectively reduce the ion concentration of water at the water inlet end of the reverse osmosis filter element 200, thereby solving the problem of overhigh TDS value of the first cup of water.

The invention also provides a water purifying device which comprises the water path system, and the specific structure of the water path system refers to the embodiment, and as the water purifying device adopts all the technical schemes of all the embodiments, the water purifying device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (13)

1. A waterway system, comprising

The integrated composite filter core comprises a front filter core and a rear filter core, and a water storage component is arranged in the composite filter core;

a first waterway is arranged between the water inlet end of the reverse osmosis filter element and the water outlet end of the front filter element, a second waterway is arranged between the water outlet end of the reverse osmosis filter element and the water inlet end of the rear filter element, and the water storage component is communicated with the second waterway;

the water inlet assembly is used for conducting or cutting off the first waterway;

a third waterway for conducting the first waterway and the second waterway;

the reflux assembly is used for conducting or cutting off the third waterway;

when the water outlet end of the rear filter element is closed, the waterway system is provided with a first backflow mode and a second backflow mode;

when in the first backflow mode, the water inlet assembly and the backflow assembly are opened;

when the water storage component is in the second backflow mode, the water inlet component is closed, the backflow component is opened, the water storage component is elastically reset, and water in the water storage component jointly enters the reverse osmosis filter element through the water inlet end and the water outlet end of the reverse osmosis filter element.

2. The waterway system of claim 1, wherein the water storage component deforms to store water when the water inlet component is opened.

3. The waterway system of claim 2, wherein when the waterway system is in the first return mode, water reenters the reverse osmosis cartridge via the third waterway and the first waterway.

4. The waterway system of claim 3, wherein when the waterway system is in the second return mode, water in the water storage assembly is co-fed into the reverse osmosis cartridge via the second waterway and the first waterway.

5. The waterway system of claim 4, wherein the post-cartridge has a water outlet cavity in communication with the post-cartridge outlet end, and wherein the water storage assembly is in communication with the water outlet cavity.

6. The waterway system of claim 5, wherein the water storage assembly includes an elastic member, and the elastic member is deformed by water pressure to store water when the water inlet assembly is opened.

7. The waterway system of claim 6, wherein the resilient member is an air bladder, and an interior cavity of the air bladder communicates with the outlet cavity.

8. The waterway system of any of claims 1-7, wherein the water inlet assembly includes a water inlet valve and a water inlet pump, two ends of the water inlet valve are respectively communicated with the water inlet pump and the pre-filter element, and a water outlet end of the water inlet pump is communicated with the reverse osmosis filter element.

9. The waterway system of claim 8, wherein the return assembly includes a return valve to turn on or off the third waterway.

10. The waterway system of claim 9, wherein the return assembly further includes a first check valve having a water outlet end in communication with a water inlet end of the return valve.

11. The waterway system of claim 10, wherein the water inlet end of the first check valve communicates with the water outlet end of the reverse osmosis cartridge and the water inlet end of the post-cartridge.

12. The waterway system of claim 9, wherein the outlet end of the return valve is in communication with the inlet end of the inlet valve.

13. A water purification apparatus comprising a water purification apparatus waterway system according to any one of claims 1 to 12.