CN114409109B

CN114409109B - Water purifier, water purification system and water quality adjusting method

Info

Publication number: CN114409109B
Application number: CN202210011375.2A
Authority: CN
Inventors: 柯映充; 孙天厚; 欧阳虎; 郑跃东
Original assignee: Foshan Midea Qinghu Water Purification Equipment Co ltd; Midea Group Co Ltd
Current assignee: Foshan Midea Qinghu Water Purification Equipment Co ltd; Midea Group Co Ltd
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2023-04-07
Anticipated expiration: 2042-01-06
Also published as: CN114409109A

Abstract

The invention discloses a water purifier, a water purification system and a water quality adjusting method. The water purification system comprises a water inlet channel, a filtering channel, a water outlet channel, a wastewater channel, a booster pump and a regulating valve. The filter channel is last to establish ties in proper order and to have leading filter core, composite filter element and rearmounted filter core, and composite filter element includes two at least parallelly connected filter core units, and the desalination of two at least filter core units is inequality, and the delivery port department of at least one in two at least filter core units is equipped with the governing valve, and the aperture of governing valve is adjustable and be suitable for the flow of adjusting corresponding filter core unit. According to the water purification system provided by the invention, the filter element unit is provided with the regulating valve with the adjustable opening degree, and the opening degree of the regulating valve is regulated, so that the preset desalination rate requirement of the water outlet end of the water purification system can be met, a water tank structure for mixing water with different desalination rates is not required, and the water can be produced in real time under the preset desalination rate requirement, so that the water production efficiency of the water purification system can be improved.

Description

Water purifier, water purification system and water quality adjusting method

Technical Field

The invention relates to the technical field of water purification equipment, in particular to a water purifier, a water purification system and a water quality adjusting method.

Background

At present, most of water purification systems are reverse osmosis water purifiers or nanofiltration water purifiers, the quality of outlet water of the reverse osmosis water purifiers or the nanofiltration water purifiers is determined when the water purifiers leave a factory, only one type of water quality can be provided, the desalination rate of the reverse osmosis water purifiers is more than 95%, the reverse osmosis water purifiers can be defined as water purifiers, outlet water is pure water, a part of beneficial mineral substances such as calcium, magnesium, potassium and the like are not reserved in the water, the desalination rate of the nanofiltration water purifiers is more than 40%, a certain amount of mineral substances are reserved in the outlet water, the outlet water quality of the two water purifiers is fixed and single, and the water requirements of some water use scenes in the telephone of users cannot be met at the same time.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a water purifier, a water purification system and a water quality adjusting method, which are used for solving the defect of single effluent quality of the water purification system in the prior art and meeting the requirements of various preset desalination rates at the water outlet end of the water purification system.

The invention also provides a water purification system, comprising:

a water inlet channel;

the filter channel is communicated with the water inlet channel, a front filter element, a composite filter element and a rear filter element are sequentially connected in series on the filter channel, the water inlet channel is communicated with the front filter element, the composite filter element comprises at least two filter element units which are connected in parallel, and the desalination rates of the at least two filter element units are different;

the water outlet channel is communicated with the rear filter element, and a one-way valve, a high-pressure switch and a water outlet control valve are sequentially arranged on the water outlet channel along the water flow direction;

the waste water channel is communicated with a waste water port of each filter element unit, and a waste water control valve is arranged on the waste water channel;

the booster pump is arranged between the preposed filter element and the composite filter element;

the water outlet of at least one of the filter element units is provided with the regulating valve, the opening of the regulating valve is adjustable and is suitable for regulating the flow of the corresponding filter element unit so as to regulate the desalination rate of water quality in the water outlet channel.

According to the water purification system provided by the invention, the regulating valve is arranged at the water outlet of the filter element unit with the lowest desalination rate.

According to the water purification system provided by the invention, the waste water outlet of at least one of the at least two filter element units is provided with the flow limiting valve.

According to the water purification system provided by the invention, the filter element unit is a reverse osmosis filter element, an ultrafiltration filter element, a nanofiltration filter element, a carbon rod filter element or a carbon fiber composite filter element.

The water purification system provided by the invention comprises a plurality of gear adjusting keys, wherein each gear adjusting key corresponds to different opening values of the adjusting valve, and each gear corresponds to water quality with different desalination rates.

According to the water purification system provided by the invention, the water purification system further comprises a touch screen, the touch screen is arranged at the tail end of the water outlet channel, and the gear adjusting key is arranged on the touch screen.

According to the water purification system provided by the invention, the water inlet control valve is arranged on the water inlet channel, or the water inlet control valve is arranged between the preposed filter element and the composite filter element.

According to the water purification system provided by the invention, at least one of the preposed filter element, the composite filter element and the postpositive filter element is internally provided with an air compression unit, when the water outlet channel is communicated, the air compression unit is released, and water in the corresponding filter element is extruded to the water outlet; when the water outlet channel is cut off, the air compression unit compresses.

According to the water purification system provided by the invention, the air compression unit is an elastic air bag.

According to the water purification system provided by the invention, the air compression unit is a storage box, air is stored in the storage box, and the storage box is provided with a communication hole which is suitable for being sealed by water in the corresponding filter element.

The invention also provides a water purifier, which comprises the water purifying system.

The invention also provides a water quality adjusting method of the water purifying system, which comprises the following steps:

acquiring target water quality information;

and adjusting the opening degree of a water outlet of at least one filter element in the composite filter element based on the target water quality information.

According to the water quality adjusting method of the water purification system, in the step of obtaining the target water quality information, the target water quality information is obtained through a gear adjusting key, or the target water quality information is obtained through self-defining the water quality desalination rate.

According to the water purification system provided by the invention, the regulating valve with the adjustable opening degree is arranged on the filter element unit, and the preset desalination rate requirement of the water outlet end of the water purification system can be met by regulating the opening degree of the regulating valve without arranging a water tank structure for mixing water with different desalination rates. In addition, under the requirement of preset desalination rate, real-time control and real-time water production can be realized, so that the water production efficiency of the water purification system can be improved.

Drawings

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

FIG. 1 is one of the schematic diagrams of a water purification system according to an embodiment of the invention;

FIG. 2 is a second schematic diagram of a water purification system according to an embodiment of the present invention;

fig. 3 is one of control flow charts of a water quality adjusting method of a water purification system according to an embodiment of the present invention;

FIG. 4 is a second control flow chart of a water quality adjusting method of a water purification system according to an embodiment of the present invention;

fig. 5 is a third control flow chart of a water quality adjusting method of a water purification system according to an embodiment of the invention;

FIG. 6 is a cross-sectional view of a filter cartridge according to an embodiment of the invention, wherein the resilient bladder is compressed;

FIG. 7 is a schematic illustration of the elastomeric bladder of FIG. 6 being further compressed;

FIG. 8 is a schematic view of the elastomeric bladder of FIG. 7 inflated to an initial state;

FIG. 9 is a view showing a momentary state of the elastic air bladder and a flow direction of water when the water outlet control valve is closed in FIG. 8;

fig. 10 is a state of the elastic air bladder and a flow direction of water after the water outlet control valve is closed for a certain period of time in fig. 9;

fig. 11 is a sectional view of a filter cartridge according to an embodiment of the present invention, in which water is stored in a storage tank, the water serving as a water seal for a communication hole;

FIG. 12 is a view showing a state in which water is pushed out when the air pressure in the storage tank of FIG. 11 is higher than the water pressure

FIG. 13 is the condition of FIG. 12 with the air in the tank completely vented;

fig. 14 is a state in which the air in the storage tank is compressed when the outlet control valves are closed in fig. 13;

FIG. 15 is a flow pattern of a cartridge according to an embodiment of the present invention;

fig. 16 is a schematic structural view of a water purification system according to an embodiment of the present invention;

FIG. 17 is a schematic diagram of a water purification system according to an embodiment of the present invention;

reference numerals are as follows:

in the water purification system 1000, a water purification system,

the water inlet passage (210) is provided with a water inlet,

a filtering passage 220, a pre-filter 221, a composite filter 222, a filter unit 223,

a water outlet passage 230, a check valve 231, a high pressure switch 232, a water outlet control valve 233,

a waste water passage 240, a waste water control valve 241,

an electric control system 260, a water quality adjusting unit 261, a gear adjusting key 262, a control unit 263,

a booster pump 251, an adjusting valve 252, a flow limiting valve 253, a water inlet control valve 254,

a touch-sensitive screen 255 is provided,

an inlet water quality detection unit 271, an outlet water quality detection unit 272,

the filter element 100 is disposed at the rear side,

a filter shell 110, a positioning part 111, a first mounting cavity 112, a second mounting cavity 113, a water inlet 114, a water outlet 115,

housing 116, open end 1161, closed end 1162, end cap 117, step 118,

a filter element body 120, a water inlet waterway 121, a water outlet waterway 122, a cover plate 123, a main body part 124, a flanging part 125 and a flanging part 126,

the air compression unit 130, the compression chamber 131,

a storage tank 140, a communication hole 141.

Detailed Description

Embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

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

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

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

A filter cartridge, a water purification system 1000, a water purifier, and a water quality adjusting method of the water purification system 1000 according to embodiments of the present invention will be described in detail with reference to fig. 1 to 17.

As shown in fig. 1 and 2, the water purification system 1000 according to the embodiment of the present invention includes a water inlet channel 210, a filtering channel 220, a water outlet channel 230, a waste water channel 240, a pressurizing pump 251, a regulating valve 252, and an electronic control system 260.

Specifically, the filtering channel 220 is communicated with the water inlet channel 210, the pre-filter element 221, the composite filter element 222 and the post-filter element 100 are sequentially connected to the filtering channel 220 in series, the water inlet channel 210 is communicated with the pre-filter element 221, the composite filter element 222 comprises at least two filter element units 223 connected in parallel, and the salt rejection rates of the at least two filter element units 223 are different. Here, "at least two filter element units 223" can be understood as two or more, i.e. a plurality of filter element units 223; the phrase "the salt rejection rates of at least two filter element units 223 are different" means that the salt rejection rate of at least one filter element unit 223 among the plurality of filter element units 223 is different from the salt rejection rates of the other filter element units 223. For example, when there are two filter element units 223, the salt rejection rates of the two filter element units 223 are not the same; when there are three filter element units 223, there is one filter element unit 223, and the salt rejection rate of the filter element unit 223 is different from at least one of the salt rejection rates of the remaining two filter element units 223.

It should be noted that when the filter element unit 223 filters water, the water quality obtained is different due to different desalination rates, that is, the mineral content of the water is different after the water passes through different filter element units 223. "Water quality" is understood here to mean the mineral content of the water; by "different water quality" is understood different mineral content in the water. The amount of water flowing through the filter element unit 223 is selectively controlled in conjunction with the salt rejection rate of the filter element unit 223, so that water having different mineral contents can be obtained. In order to conveniently adjust the water quality, the adjusting valve 252 is arranged at the water outlet of at least one of the plurality of filter element units 223, the opening of the adjusting valve 252 is adjustable and is suitable for adjusting the flow rate of the corresponding filter element unit 223, so that the water yield of at least one filter element unit 223 in the plurality of filter element units 223 is different from that of other filter element units, and water with different desalination rates can be obtained after the water produced by the plurality of filter element units 223 is mixed, thereby achieving the purpose of adjusting the desalination rate of the water in the whole water outlet channel 230. It should be noted that, in the process of flowing water in the filtering channel 220, because the opening degree of the water outlet of at least one of the plurality of filter element units 223 is adjustable, the filter element unit 223 can continuously adjust the desalination rate of the outlet water, so that the outlet water of the water purifying system 1000 meets the requirement of the outlet water quality.

The plurality of filter element units 223 are connected in parallel to construct the composite filter element 222, and water filtered by the plurality of filter element units 223 is collected to the water outlet channel 230 and mixed in the water outlet channel 230, so that a water tank structure for mixing water with different salt rejection rates is not required. Further, through setting up governing valve 252 at the delivery port department of filter element unit 223, through the aperture of adjusting governing valve 252, can satisfy the predetermined desalination requirement of water purification system 1000 delivery port end, under the requirement of predetermined desalination, can realize real time control, produce water in real time moreover to can promote water purification system 1000's the water efficiency of producing. Here, the regulating valve 252 may be an electric regulating valve 252, thereby facilitating control of the water purifying system 1000.

Referring to fig. 1, the water outlet passage 230 is communicated with the rear filter element 100, and a check valve 231, a high-pressure switch 232 and a water outlet control valve 233 are sequentially arranged on the water outlet passage 230 along the water flow direction. The water outlet control valve 233 is used for controlling the on/off of the water outlet channel 230, for example, when the water outlet control valve 233 receives a high-potential electrical signal, the water outlet control valve 233 is in a connected state, and water in the water outlet channel 230 can flow; when the water outlet control valve 233 receives a low-level electric signal, the water outlet control valve 233 is in an off state, and at this time, the water in the water outlet passage 230 is blocked. The check valve 231 may be used to control the water flow in one direction, for example, by providing the check valve 231 on the outlet channel 230, the water flow can only flow towards one end of the outlet channel 230, but not in the opposite direction. The high-voltage switch 232 may control the start-up or shut-down of the water purification system 1000. It should be noted that the outlet control valve 233 may be a solenoid valve, thereby facilitating the control of the opening and closing of the outlet passage 230.

The waste water port of each filter element unit 223 is communicated with a waste water channel 240, and a waste water control valve 241 is arranged on the waste water channel 240. The waste water passage 240 may collect the water and waste water filtered by the filter element unit 223 to be recovered as concentrated water. The booster pump 251 is disposed between the pre-filter 221 and the composite filter 222 for increasing the pressure of the water flow in the filtering channel 220, so that the water can smoothly flow through the filtering channel 220.

The electric control system 260 comprises a water quality adjusting unit 261 and a control unit 263, wherein the water quality adjusting unit 261, the regulating valve 252, the high-pressure switch 232, the water outlet control valve 233, the booster pump 251 and the waste water control valve 241 are all in communication connection with the control unit 263. The electric control system 260 may be a control center of the entire water purification system 1000, the water quality adjusting unit 261 may be a signal input terminal, the control unit 263 is a data processing center and a control command transmitting terminal, and the regulating valve 252, the high-pressure switch 232, the outlet control valve 233, the booster pump 251 and the waste water control valve 241 are all control command receiving terminals and execute corresponding control commands.

According to the water purification system 1000 provided by the embodiment of the invention, the regulating valve 252 with the adjustable opening degree is arranged on the filter element unit 223, and the opening degree of the regulating valve 252 is regulated, so that the preset requirement of the water desalination rate at the water outlet end of the water purification system 1000 can be met, a water tank structure for mixing water with different desalination rates is not required, and real-time control and real-time water production can be realized under the requirement of the preset desalination rate, so that the water production efficiency of the water purification system 1000 can be improved.

According to some embodiments of the present invention, referring to fig. 1 and 2, the control valve 252 is disposed at the outlet of the lowest salt rejection filter unit 223. Thus, the range of adjustment of the salt rejection can be expanded. Specifically, the opening of the regulator valve 252 may be adjustable between a fully closed state and a fully open state. For convenience of description, the composite filter element 222 includes two filter element units 223, wherein one of the filter element units 223 is a high-desalination filter element, and the desalination rate is 95%; the other cartridge unit 223 is a low salt rejection cartridge and has a salt rejection of 40%. The control valve 252 is disposed at the water outlet of the low desalination rate filter element unit 223 to control the flow rate of the water outlet.

When the regulating valve 252 is in a completely closed state, the effluent of the water purification system 1000 is the purified water of the high desalination rate filter element unit 223, and the desalination rate can reach 95%; when the regulating valve 252 is in a fully opened state, the water outlet of the water purification system 1000 is mixed water of the water outlet of the filter element unit 223 with high desalination rate and the water outlet of the filter element unit 223 with low desalination rate, the mixing ratio is 1:1, and the desalination rate of the purified water is 60%; when the regulating valve 252 is opened at a certain angle, the water discharged from the water purification system 1000 is mixed water of the filter element unit 223 with high desalination rate and the filter element unit 223 with low desalination rate, the ratio of reverse osmosis water is higher than that of nano filtration water, and the desalination rate of purified water is in the range of 60% -95%.

In some embodiments, referring to fig. 1, a flow restriction valve 253 is provided at the waste water outlet of at least one of the plurality of filter element units 223. The flow limiting valve 253 can be a small flow limiting hole with a fixed aperture, the aperture of the small flow limiting hole can be matched according to the flow of the water purification system 1000, for example, the 800G water purification system 1000 can be matched with the flow limiting valve 253 with the aperture of 0.8mm-1.2mm, so that the flow limiting valve 253 can be in direct proportion to the water outlet flux of the water purification system 1000. In some examples, the flow restriction valve 253 may be disposed at a wastewater outlet of the filter element unit 223 having the lowest salt rejection rate.

When the plurality of filter element units 223 form the composite filter element, a pressure difference may occur between the plurality of filter element units 223, and the existence of the pressure difference may easily cause unstable desalination rate of the whole water purification system. To address this technical problem, a flow limiting valve 253 may be provided to balance the pressure difference between the plurality of filter element units, so as to improve the salt rejection stability of the entire water purification system 1000. For example, when there are two filter element units 223, the flow restriction valve 253 may equalize the pressure difference of the two filter element units 223.

According to some embodiments of the present invention, the filter element unit 223 may be a reverse osmosis filter element, an ultrafiltration filter element, a nanofiltration filter element, a carbon rod filter element, or a carbon fiber composite filter element 222. For example, the composite filter element 222 of the water purification system 1000 includes two filter element units 223, one of the two filter element units 223 is a reverse osmosis filter element, that is, the filter element unit 223 is a high desalination filter element and the desalination rate is 95%; the other filter element unit 223 is a nanofiltration filter element, that is, the filter element unit 223 is a low desalination filter element with a desalination rate of 40%, and the adjusting valve 252 is disposed at the outlet of the nanofiltration filter element to adjust the flow rate of water flowing out of the nanofiltration filter element. It should be noted that the water purification system 1000 is not limited to a reverse osmosis filter element and a nanofiltration filter element connected in parallel, and can be flexibly adjusted based on different requirements of users as long as membrane elements with different filtration precisions can be mixed with water with different contents of mineral substances.

Referring to fig. 1 and 3, according to some embodiments of the present invention, the water quality adjusting unit 261 may include a plurality of shift adjusting keys 262, each shift adjusting key 262 corresponding to a different opening value of the adjusting valve 252, and each shift corresponding to a different water quality. For example, one of the plurality of gear adjustment keys 262 may correspond to pure water (262 a), another one of the plurality of gear adjustment keys may correspond to low-mineral water (262 b), and another one of the plurality of gear adjustment keys may correspond to high-mineral water (262 c). Like this, when the user triggered the gear adjustment key 262 that low mineral water corresponds, the control unit 263 received the corresponding signal of telecommunication to convert the signal of telecommunication into control command, and give control command transmission valve body structures such as governing valve 252, governing valve 252 can adjust the aperture according to control command, so that whole water purification system 1000 can export low mineral water.

According to some embodiments of the present invention, the water purification system 1000 may further include a water inlet control valve 254, the water inlet control valve 254 is connected to the control unit 263 in a communication manner, and the water inlet control valve 254 is disposed on the water inlet passage 210, as shown in fig. 2. Of course, the location of the intake control valve 254 is not limited thereto, and for example, in some embodiments, referring to fig. 1, the intake control valve 254 can also be located between the pre-cartridge 221 and the composite cartridge 222. It should be noted that the position of the intake control valve 254 does not substantially affect the electric control logic of the water purification system 1000, and thus the position of the intake control valve 254 can be flexibly adjusted according to installation space and design requirements. In some examples, intake control valve 254 may be a solenoid valve, which is common and easy to maintain or replace; on the other hand, the solenoid valve is cheap, and the equipment cost of the whole water purification system 1000 can be saved.

Further, the water purification system 1000 may further include a touch screen 255, the touch screen 255 is disposed at the end of the water outlet channel 230, and the touch screen 255 is in communication connection with the control unit 263. For example, the touch screen 255 may be disposed on a faucet of the water purification system 1000, such that a user may observe the state of the water purification system 1000 through the touch screen 255 on the faucet. Further, the gear adjustment key 262 may be disposed on the touch screen 255, so that a user can directly operate the touch screen 255 to control the water purifying system 1000.

Specifically, referring to fig. 3, three gear adjustment keys 262 are arranged on the touch screen 255 of the faucet, and the three gear adjustment keys 262 correspond to a pure water gear, a high mineral water gear and a low mineral water gear respectively. The user can select the water quality according to the requirement. When the user selects the pure water gear, the gear adjusting key 262 corresponding to the pure water gear on the touch screen 255 is clicked, and the control unit 263 receives an electric signal corresponding to the gear adjusting key 262; based on the electrical signals, the control unit 263 sends a control command to start the water inlet control valve 254 and the booster pump 251, adjust the regulating valve 252 to the closed state, and then start the water outlet control valve 233, so that the water purification system 1000 outputs purified water, wherein the desalination rate of the purified water can reach 95%.

When the user selects a low-mineral water gear, the gear adjusting key 262 corresponding to the low-mineral water gear on the touch screen 255 is clicked, and the control unit 263 receives an electric signal corresponding to the gear adjusting key 262; based on the electric signals, the control unit 263 issues a control command to start the water inlet control valve 254 and the booster pump 251, adjust the opening degree of the regulating valve 252 to 30%, and then start the water outlet control valve 233, at which time the water purification system 1000 outputs low-mineral water, which may have a desalination rate of 78% -82%.

When the user selects a high-mineral water gear, the gear adjusting key 262 corresponding to the high-mineral water gear on the touch screen 255 is clicked, and the control unit 263 receives an electric signal corresponding to the gear adjusting key 262; based on the electric signals, the control unit 263 sends a control command to start the water inlet control valve 254 and the booster pump 251, adjust the opening degree of the regulating valve 252 to 100%, and then start the water outlet control valve 233, at which time the water purification system 1000 outputs the high mineral water, which may have a desalination rate of 60% to 65%.

The gear adjusting key 262 is not limited to three water quality gears such as pure water, low mineral water and high mineral water, and other water using scenes or self-defined water quality gears can be added, the control unit 263 presets the opening degree of the adjusting valve 252 corresponding to each gear, when the control unit 263 receives a signal, the water inlet control valve 254 and the booster pump 251 are started, the adjusting valve 252 is adjusted to the corresponding opening degree, and finally the water outlet control valve 233 is opened to supply water, so that water required by a user can be obtained, the water using requirement of the user is met, and the satisfaction degree of the user is greatly improved.

As shown in table 1, the following table is the experimental data for the water purification system 1000:

TABLE 1

As shown in fig. 1 and 4, according to some embodiments of the present invention, the water purification system 1000 further includes an inlet water quality detection unit 271, and the inlet water quality detection unit 271 is disposed upstream of the composite filter element 222 for detecting the inlet water quality. The incoming water quality detection unit 271 may be a TDS probe, i.e., a water quality sensor, and the detected value thereof may be referred to as a TDS value. It should be noted that, according to the user's needs, the outlet water of the water purification system 1000 needs to contain a certain amount of minerals, but in the region with higher water hardness, the desalination rate is too low, so that the water is easily scaled, and the user experience effect is poor. To solve the technical problem, a water inlet quality detection unit 271 is disposed at the water inlet end of the water purification system 1000, and before water flows to the composite filter element 222, the mineral content of the water is detected, and the opening of the regulating valve 252 is adjusted according to the water quality of the inlet water, so that the water quality of the outlet water reaches the target water quality. For example, as shown in table 2, a plurality of gears such as, but not limited to, pure water, high-mineral water, low-mineral water, and custom-defined are provided on the touch screen 255 for a user to select according to a water demand, and for an area with relatively poor water quality, if the user selects a high-mineral gear with a low desalination rate, a problem of scaling caused by boiling water may occur. Specifically, in the high-mineral water range, the opening of the regulating valve 252 and the corresponding high-mineral water desalination rate set a threshold, see table 2.

Quality of inlet water (mg/L)	Opening of regulating valve for high-grade mine water	High mineral water desalination rate setting threshold value
			TDS≤250	100％	60％
250＜TDS≤350	60％	70％
			350＜TDS≤450	40％	75％
450＜TDS	30％	80％

TABLE 2

Specifically, as shown in fig. 4 and table 2, a plurality of shift adjustment keys 262 may be disposed on the touch screen 255 for the user to select according to the requirement. When the user selects a high-mineral water gear, the intake water quality detection unit 271 detects the TDS value of the intake water and feeds the value back to the control unit 263, and the control unit 263 performs judgment processing according to the received signal:

when the inlet water quality TDS is less than or equal to 250mg/L, the inlet water control valve 254 and the booster pump 251 are sequentially opened, the opening degree of the regulating valve 252 is regulated to 100%, that is, the regulating valve 252 is in a fully opened state, finally, the outlet water control valve 233 is opened, and the water purification system 1000 discharges purified water. Setting a threshold value of the high mineral water desalination rate to be 60% -65%, and comparing the high mineral water desalination rate with the threshold value and the actual desalination rate;

when the inlet water quality is more than 250mg/L and less than or equal to 350mg/L, the inlet water control valve 254 and the booster pump 251 are opened in sequence, the opening degree of the regulating valve 252 is adjusted to 60 percent, finally the outlet water control valve 233 is opened, and the purified water is discharged from the water purification system 1000. Setting a set threshold value of the high mineral water desalination rate to be more than or equal to 70%, and comparing the set threshold value of the high mineral water desalination rate with the actual desalination rate;

when the inlet water quality is more than 350mg/L and less than or equal to 450mg/L, the inlet water control valve 254 and the booster pump 251 are opened in sequence, the opening degree of the regulating valve 252 is adjusted to 40%, finally the outlet water control valve 233 is opened, and the purified water is discharged from the water purification system 1000. Setting a set threshold value of the high mineral water desalination rate to be more than or equal to 75%, and comparing the set threshold value of the high mineral water desalination rate with the actual desalination rate;

when the inlet water quality is 450mg/L < TDS, the inlet water control valve 254 and the booster pump 251 are sequentially opened, the opening degree of the regulating valve 252 is regulated to 30%, finally the outlet water control valve 233 is opened, and the purified water is discharged from the water purification system 1000. Setting the set threshold value of the high mineral water desalination rate to be more than or equal to 80%, and comparing the set threshold value of the high mineral water desalination rate with the actual desalination rate.

Based on this, the data shown in table 3 were obtained by experiment:

TABLE 3

By combining the above table, the working condition of the water purification system 1000 can be known by comparing the set threshold value and the actual desalination rate of the high mineral water, so that the effluent quality of the water purification system 1000 can meet the set requirement, and the scaling risk of the water purification system 1000 can be reduced.

In addition, it should be noted that, by setting the threshold value of the desalination rate of the high mineral water, the TDS value of the effluent of the high mineral water can be controlled, and the water quality with the TDS value smaller than 150mg/L does not scale, so that the water purification system 1000 can meet the water demand of users in different scenes, and can ensure the effluent quality to prevent the effluent from scaling, thereby greatly improving the satisfaction degree of the users.

To facilitate the installation of the influent water quality detection unit, as shown in fig. 1 and 2, according to some embodiments of the present invention, an influent water quality detection unit 271 is located between the booster pump 251 and the pre-filter 221. Further, referring to fig. 1, the inlet water control valve 254 is disposed between the pre-filter 221 and the composite filter 222, and the inlet water quality detection unit 271 is disposed between the inlet water control valve 254 and the pre-filter 221.

According to some embodiments of the present invention, the water purification system 1000 further includes an effluent quality detection unit 272, and the effluent quality detection unit 272 is disposed in the effluent channel 230 for detecting the quality of the effluent. The effluent quality detecting unit 272 may be a TDS probe, that is, a water quality sensor. When the water purification system 1000 adjusts the water quality, if the effluent quality does not reach the standard, for example, the effluent quality exceeds the expected effluent quality or the effluent quality does not reach the expected effluent quality, the opening of the adjusting valve 252 may be adjusted to make the effluent quality reach the expected water quality.

Here, the detection result of the effluent quality detection unit 272 can be used as feedback information of the water purification system 1000, and the opening of the adjustment valve 252 is adjusted based on the effluent quality information, so as to compensate the effluent quality, so that the water in the effluent channel 230 meets the effluent quality requirement. As shown in fig. 1 and 5, three gear adjusting keys 262 are arranged on the touch screen 255 of the faucet, and the three gear adjusting keys 262 respectively correspond to a pure water gear, a high mineral water gear and a low mineral water gear. The user can select the water quality according to the requirement.

When the user selects a low-mineral water gear, the gear adjusting key 262 corresponding to the pure water gear on the touch screen 255 is clicked, and the control unit 263 receives an electric signal corresponding to the gear adjusting key 262; based on the electric signal, the control unit 263 sends a control instruction, the water inlet control valve 254 and the booster pump 251 are started first, the opening degree of the regulating valve 252 is adjusted to be in a state of 30%, the water outlet control valve 233 is opened, and the water purification system 1000 outputs low-mineral water; meanwhile, the inlet water quality detection unit 271 is configured to detect the quality of water entering the composite filter element 222, the outlet water quality detection unit 272 is configured to detect the quality of water output by the water purification system 1000, detection data of the inlet water quality detection unit 271 and the outlet water quality detection unit 272 can be fed back to the control unit 263, the control unit 263 calculates the desalination rate of purified water according to the fed-back data, and the calculation formula of the desalination rate can be: salt rejection = (1-effluent TDS value/influent TDS value) × 100%. And comparing the calculation result with a preset threshold value of the high mineral water desalination rate.

The low-mineral effluent water quality desalination rate set point may be 78% -82%. If the calculated result of the desalination rate of the purified water is less than 78%, the control unit 263 sends out an instruction for adjusting the opening of the regulating valve 252, closes the angle by 2% on the basis of the original state, and then detects and compares the quality of the outlet water again until the desalination rate of the purified water meets the set 78% -82%; if the calculation result is greater than 82%, the control unit 263 sends out an instruction for adjusting the opening of the regulating valve 252, opens the angle of 2% again on the basis of the original state, and then detects and compares the effluent quality again until the desalination rate of the purified water meets the set value of 78% -82%; if the calculated result is 78% -82% and is consistent with the set value, the water is continuously discharged in the current state, and the low-mineral water quality meeting the requirement is provided for the user.

When the user selects a high-mineral water gear, as shown in fig. 5, the gear adjusting key 262 corresponding to the pure water gear on the touch screen 255 is clicked, and the control unit 263 receives an electric signal corresponding to the gear adjusting key 262; based on the electric signal, the control unit 263 sends a control instruction, starts the water inlet control valve 254 and the booster pump 251, adjusts the opening degree of the regulating valve 252 to 100%, that is, the regulating valve 252 is in a fully opened state, and then opens the water outlet control valve 233, so that the water purification system 1000 outputs high mineral water; meanwhile, the inlet water quality detection unit 271 is configured to detect the quality of water entering the composite filter element 222, the outlet water quality detection unit 272 is configured to detect the quality of water output by the water purification system 1000, detection data of the inlet water quality detection unit 271 and the outlet water quality detection unit 272 can be fed back to the control unit 263, the control unit 263 calculates the desalination rate of the purified water according to the fed-back data, and the calculation formula of the desalination rate can be: salt rejection = (1-outlet TDS value/inlet TDS value) × 100%. And comparing the calculation result with the target water quality desalination rate.

The set value of the desalination rate of the high-mineral effluent water quality is 60% -65%, if the calculation result is less than 60%, the control unit 263 sends out a control instruction for adjusting the opening degree of the regulating valve 252 again, the angle is closed by 2% again on the basis of the original state, and then the effluent water quality is detected and compared again until the desalination rate of the purified water meets the set value of 60% -65%; if the calculation result is greater than 65%, the control unit 263 sends out a control instruction for adjusting the opening degree of the regulating valve 252 again, opens the angle by 2% again on the basis of the original state, and then detects and compares the effluent quality again until the desalination rate of the purified water meets the set value of 60% -65%; if the calculated result is 60-65% matched with the set value, the water is continuously discharged in the current state, and the high-mineral water quality meeting the requirement is provided for the user.

The touch screen 255 is not limited to three water quality gears such as pure water, low-mineral water and high-mineral water, and other water use scenes or self-defined water quality gears can be added, the control unit 263 presets the opening angles corresponding to the regulating valves 252 corresponding to the gears, when the control unit 263 receives a signal, the control unit 263 sequentially opens the opening angles corresponding to the water inlet control valve 254, the booster pump 251 and the regulating valve 252, and then opens the water outlet control valve 233 for water supply, and when the tap is discharging water, the water quality of the discharged water is detected and compared with the target water quality desalination rate range, and if the comparison value is deviated, correction and compensation are further performed until the water quality of the discharged water is consistent with the target water quality desalination rate range.

See table 4, table 4 for specific experimental data:

TABLE 4

According to some embodiments of the present invention, the effluent quality detecting unit 272 is located between the high-pressure switch 232 and the effluent control valve 233. Thereby, the outlet water quality detection unit 272 can be conveniently arranged.

A water purifier according to an embodiment of the present invention includes the water purification system 1000 as described above.

According to the water purifier provided by the embodiment of the invention, the regulating valve 252 with the adjustable opening degree is arranged on the filter element unit 223, and the opening degree of the regulating valve 252 is regulated, so that the preset desalination rate requirement of the water outlet end of the water purification system 1000 can be met, a water tank structure for mixing water with different desalination rates is not required, and the water can be controlled in real time and produced in real time under the preset desalination rate requirement, so that the water production efficiency of the water purification system 1000 can be improved.

Referring to fig. 3, according to the water quality adjusting method of the water purifying system 1000 of the embodiment of the present invention, the adjusting method includes:

the method comprises the following steps: and acquiring target water quality information. Here, the "target water quality information" may be mineral content information of the outlet water of the water purification system 1000, the information may correspond to the gear adjustment key 262 on the touch screen 255, that is, when the gear adjustment key 262 is triggered, the corresponding water quality information may be converted into an electrical signal, the control unit 263 is in communication connection with the touch screen 255, and the control unit 263 may obtain the target water quality information.

Step two: and adjusting the opening degree of the water outlet of at least one filter element in the composite filter element 222 based on the target water quality information. After receiving the target water quality information, the control unit 263 can convert the target water quality information into a control instruction, and the control unit 263 sends the control instruction to each control valve and adjusts the adjusting valve 252 to a corresponding opening degree, thereby achieving the purpose of adjusting the water quality.

According to the water quality adjusting method of the water purification system 1000 provided by the embodiment of the invention, the adjusting valve 252 with the adjustable opening degree is arranged on the filter element unit 223, and the opening degree of the adjusting valve 252 is adjusted, so that the preset desalination rate requirement of the water outlet end of the water purification system 1000 can be met, a water tank structure for mixing water with different desalination rates is not required, and the real-time control and real-time water production can be realized under the preset desalination rate requirement, thereby improving the water production efficiency of the water purification system 1000.

According to some embodiments of the present invention, in the step of acquiring the target water quality information, the target water quality information is acquired through the gear adjustment key 262, or the target water quality information is acquired through customizing the water quality desalination rate. Thereby increasing the flexibility and diversity of water quality regulation.

A water quality adjusting method of the water purifying system 1000 according to an embodiment of the present invention will be described in detail with reference to fig. 1 and 3.

Specifically, as shown in fig. 1, the water purification system 1000 includes a water inlet channel 210, a filtering channel 220, a water outlet channel 230, a wastewater channel 240, a booster pump 251, a regulating valve 252, a touch screen 255 and an electric control system 260. The composite filter element 222 comprises a plurality of filter element units 223 connected in parallel, the desalination rates of the plurality of filter element units 223 are different, and the regulating valve 252 is arranged at the water outlet of the filter element unit 223 with the lowest desalination rate. The touch screen 255 can be arranged at the water tap of the water purification system 1000, so that the user can conveniently observe the touch screen.

For convenience of description, the composite filter element 222 includes two filter element units 223, wherein one of the filter element units 223 is a high-desalination filter element, and the desalination rate is 95%; the other cartridge unit 223 is a low salt rejection cartridge and has a salt rejection of 40%. The control valve 252 is disposed at the water outlet of the low desalination rate filter element unit 223 to control the flow rate of the water outlet.

When the regulating valve 252 is in a completely closed state, the effluent of the water purification system 1000 is the purified water of the high-desalination filter element unit 223, and the desalination rate can reach 95%; when the regulating valve 252 is in a fully opened state, the water outlet of the water purification system 1000 is mixed water of the water outlet of the filter element unit 223 with high desalination rate and the water outlet of the filter element unit 223 with low desalination rate, the mixing ratio is 1:1, and the desalination rate of the purified water is 60%; when the regulating valve 252 is opened at a certain angle, the water discharged from the water purification system 1000 is mixed water of the filter element unit 223 with high desalination rate and the filter element unit 223 with low desalination rate, the ratio of reverse osmosis water is higher than that of nano filtration water, and the desalination rate of purified water is in the range of 60% -95%.

Be provided with three gear adjustment key 262 on the touch-control screen 255, three gear adjustment key 262 corresponds pure water gear, high mineral water gear and low mineral water gear respectively. The user can select the water quality according to the requirement. When the user selects a purified water gear, the gear adjusting key 262 corresponding to the purified water gear on the touch screen 255 is clicked, and the control unit 263 receives an electric signal corresponding to the gear adjusting key 262; based on the electrical signals, the control unit 263 sends a control command to start the water inlet control valve 254 and the booster pump 251, adjust the regulating valve 252 to the closed state, and then start the water outlet control valve 233, so that the water purification system 1000 outputs purified water, wherein the desalination rate of the purified water can reach 95%.

When the user selects a low-mine-water gear, the gear adjusting key 262 corresponding to the low-mine-water gear on the touch screen 255 is clicked, and the control unit 263 receives an electric signal corresponding to the gear adjusting key 262; based on the electric signals, the control unit 263 issues a control command to start the water inlet control valve 254 and the booster pump 251, adjust the opening degree of the regulating valve 252 to 30%, and then start the water outlet control valve 233, at which time the water purification system 1000 outputs low-mineral water, which may have a desalination rate of 78% -82%.

When the user selects a high mineral water gear, the gear adjusting key 262 corresponding to the high mineral water gear on the touch screen 255 is clicked, and the control unit 263 receives an electric signal corresponding to the gear adjusting key 262; based on the electric signals, the control unit 263 sends out control commands to start the water inlet control valve 254 and the booster pump 251, adjust the opening degree of the regulating valve 252 to 100%, and then start the water outlet control valve 233, at which the water purification system 1000 outputs high mineral water, which may have a desalination rate of 60% to 65%.

The gear adjusting key 262 is not limited to three water quality gears such as pure water, low mineral water and high mineral water, and other water use scenes or self-defined water quality gears can be added, the control unit 263 presets the opening degree of the adjusting valve 252 corresponding to each gear, when the control unit 263 receives a signal, the water inlet control valve 254 and the booster pump 251 are started, the adjusting valve 252 is adjusted to the corresponding opening degree, and finally the water outlet control valve 233 is opened to supply water, so that water required by a user can be obtained, the water use requirement of the user is met, and the satisfaction degree of the user is greatly improved.

Referring to fig. 4, according to the water quality adjusting method of the water purifying system 1000 of the embodiment of the present invention, the adjusting method includes:

the method comprises the following steps: and acquiring target water quality information and inflow water quality information. Here, the "target water quality information" may be mineral content information of the outlet water of the water purification system 1000, the information may correspond to the gear adjustment key 262 on the touch screen 255, that is, when the gear adjustment key 262 is triggered, the corresponding water quality information may be converted into an electrical signal, the control unit 263 is in communication connection with the touch screen 255, and the control unit 263 may obtain the target water quality information. The "inlet water quality information" may be the water quality information of the water inlet position of the water purification system 1000, or may be the water quality information of the water entering the composite filter element 222. The inlet water quality information may be detected by the inlet water quality detection unit 271. Specifically, the inlet water quality detecting unit 271 may be a TDS probe, that is, a water quality sensor. The control unit 263 may receive detection information of the inflow water quality detection unit 271.

Step two: based on the target water quality information and the inlet water quality information, the opening degree of a water outlet of at least one filter element in the composite filter element 222 is adjusted, and the desalination rate of the composite filter element 222 is adjusted to obtain the target water quality. After receiving the target water quality information and the inflow water quality information, the control unit 263 can convert the target water quality information and the inflow water quality information into corresponding control instructions, and the control unit 263 sends the control instructions to the control valves and adjusts the adjusting valve 252 to the corresponding opening degree, thereby achieving the purpose of adjusting the water quality.

According to the water quality adjusting method of the water purification system 1000 in the embodiment of the invention, at the water inlet end of the water purification system 1000, the mineral content of water is detected first, and the opening of the adjusting valve 252 is adjusted according to the quality of the inlet water. From this, when water purification system 1000 prepared high mineral water, can avoid the inside scale deposit of water purification system 1000, improve and use experience.

According to some embodiments of the present invention, in the step of obtaining the target water quality information and the inlet water quality information, the target water quality information is obtained through the gear adjustment key 262, or the target water quality information is obtained through customizing the water quality desalination rate.

According to some embodiments of the present invention, in the step of obtaining the target water quality information and the inlet water quality information, that is, in the step one, the inlet water quality information is obtained by using the inlet water quality detection unit 271, and the target water quality information may be high mineral water. It should be noted that "high" in "high mineral water" refers to a relative height, for example, as opposed to "low" in "low mineral water".

Based on the target water quality information and the inflow water quality information, adjusting the opening degree of a water outlet of at least one filter element in the composite filter element, and adjusting the desalination rate of the composite filter element to obtain the target water quality, wherein the steps comprise:

when the inlet water quality information is less than or equal to 250mg/L, setting the set threshold value of the high mineral water desalination rate to be 60-65%, and adjusting the opening of the regulating valve 252 to enable the outlet water quality to meet the set threshold value of the high mineral water desalination rate;

when the inlet water quality information is less than or equal to 350mg/L and more than 250mg/L, setting the high mineral water desalination rate setting threshold value to be more than or equal to 70%, and adjusting the opening of the regulating valve 252 to enable the outlet water quality to meet the high mineral water desalination rate setting threshold value;

when the inflow water quality information is less than or equal to 450mg/L and greater than 350mg/L, setting the high mineral water desalination rate setting threshold value to be greater than or equal to 75%, and adjusting the opening of the regulating valve 252 to enable the outflow water quality to meet the high mineral water desalination rate setting threshold value;

when the inlet water quality information is larger than 450mg/L, the set threshold value of the high mineral water desalination rate is set to be larger than or equal to 80%, and the opening degree of the regulating valve 252 is adjusted, so that the outlet water quality meets the set threshold value of the high mineral water desalination rate.

It should be noted that, considering the difference of the quality of the inlet water, if a single high mineral water desalination rate setting threshold is set, the mineral content in the outlet water quality of the water purification system is at an ultra-high risk, which easily causes scaling of the inlet water system, based on the inlet water quality information, the corresponding high mineral water desalination rate setting threshold is set, and then the opening degree of the regulating valve 252 is combined, so that the outlet water quality can meet the high mineral water desalination rate setting threshold, and scaling of the inlet water system 1000 can be prevented.

A water quality adjusting method of the water purifying system 1000 according to an embodiment of the present invention will be described in detail with reference to fig. 1 and 4. It is to be understood that the following description is illustrative only and is not intended to be in any way limiting.

Specifically, as shown in fig. 1, the water purification system 1000 includes a water inlet channel 210, a filtering channel 220, a water outlet channel 230, a wastewater channel 240, a booster pump 251, a regulating valve 252, a touch screen 255 and an electric control system 260. The composite filter element 222 comprises a plurality of filter element units 223 connected in parallel, the desalination rates of the plurality of filter element units 223 are different, and the regulating valve 252 is arranged at the water outlet of the filter element unit 223 with the lowest desalination rate. The touch screen 255 can be disposed at the faucet of the water purification system 1000 for the convenience of the user.

For convenience of description, the composite filter element 222 includes two filter element units 223, wherein one of the filter element units 223 is a high-desalination filter element, and the desalination rate is 95%; the other cartridge unit 223 is a low salt rejection cartridge, and the salt rejection is 40%. The control valve 252 is disposed at the water outlet of the low desalination rate filter element unit 223 to control the flow rate of the water outlet.

A plurality of gear adjustment keys 262, such as high mineral water, low mineral water or purified water, may be provided on the touch screen 255 for the user to select according to the requirement. When the user selects a high mineral water gear, the incoming water quality detection unit 271 detects the TDS value of the incoming water and feeds the value back to the control unit 263, and the control unit 263 performs judgment processing according to the received signal.

Referring to table 2, in the high mineral water range, the opening of the control valve 252 and the corresponding desalination rate of high mineral water set the threshold value. Here, the "set threshold value for the salt rejection of high mineral water" may be a threshold value for the salt rejection of water flowing out of the composite filter element 222.

When the incoming water quality TDS is less than or equal to 250mg/L, setting a threshold value for setting the desalination rate of the high mineral water to be 60-65%, sequentially opening the incoming water control valve 254 and the booster pump 251, adjusting the opening degree of the regulating valve 252 to 100%, namely, the regulating valve 252 is in a fully opened state, finally opening the outgoing water control valve 233, and discharging purified water from the water purification system 1000;

when the quality of the inlet water is more than 250mg/L and less than or equal to 350mg/L, setting the set threshold value of the high mineral water desalination rate to be more than or equal to 70%, sequentially opening the inlet water control valve 254 and the booster pump 251, adjusting the opening degree of the regulating valve 252 to 60%, finally opening the outlet water control valve 233, and discharging purified water from the water purification system 1000;

when the quality of the inlet water is more than 350mg/L and less than or equal to 450mg/L, setting the desalination rate of the high mineral water to be more than or equal to 75%, sequentially opening the inlet water control valve 254 and the booster pump 251, adjusting the opening degree of the regulating valve 252 to 40%, finally opening the outlet water control valve 233, and discharging purified water from the water purification system 1000;

when the quality of the inlet water is 450mg/L and is smaller than TDS, the set threshold value of the desalination rate of the high mineral water is greater than or equal to 80%, the inlet water control valve 254 and the booster pump 251 are sequentially opened, the opening degree of the regulating valve 252 is adjusted to 30%, finally the outlet water control valve 233 is opened, and the purified water is discharged from the water purification system 1000.

Referring to table 3, the data shown in table 3 can be obtained by experiment:

when the incoming water quality TDS is less than or equal to 250mg/L, setting the threshold value of the high mineral water desalination rate to be 60%, the opening degree of the regulating valve 252 to be 100%, the outgoing water TDS value to be 84mg/L, and the actual desalination rate to be 61.8%;

when the inflow water quality is more than 250mg/L and less than or equal to 350mg/L, setting the threshold value of the high mineral water desalination rate to be 70%, the opening of the regulating valve 252 to be 60%, the effluent TDS value to be 90mg/L, and the actual desalination rate to be 70.9%;

when the inflow water quality is more than 350mg/L and less than or equal to 450mg/L, setting the threshold value of the high mineral water desalination rate to be 75%, the opening degree of the regulating valve 252 to be 40%, the effluent TDS value to be 93mg/L, and the actual desalination rate to be 75.5%;

when the inflow water quality is 450mg/L < TDS, the set threshold value of the high mineral water desalination rate is 80%, the opening of the regulating valve 252 is 30%, the effluent TDS value is 97mg/L, and the actual desalination rate is 80.6%.

From this, through setting for the desalination rate threshold value of high mineral water, can control the TDS value of the play water of high mineral water, the phenomenon of scale deposit can not appear in the quality of water that the TDS value is less than 150mg/L, therefore this water purification system 1000 can satisfy the water demand of the different scenes of user, can guarantee again simultaneously that play water quality of water prevents out the water scale deposit, can promote user satisfaction greatly.

Referring to fig. 5, according to the water quality adjusting method of the water purifying system 1000 of the embodiment of the present invention, the adjusting method includes:

the method comprises the following steps: and acquiring the target water quality desalination rate range, inlet water quality information and outlet water quality information. Here, the "target water quality desalination rate range" may be range information of the mineral content of the effluent of the water purification system 1000. The "water quality information of the inlet water" may be the water quality information of the water inlet of the water purification system 1000, or may be the water quality information of the water entering the composite filter element 222, and the water quality information of the inlet water may be detected by the water quality detection unit 271. The "outlet water quality information" may be water quality information of the water outlet of the water purification system 1000, or may be water quality information of the water outlet of the composite filter element 222, and the outlet water quality information may be detected by the outlet water quality detection unit 272. Specifically, both the inlet water quality detecting unit 271 and the outlet water quality detecting unit 272 may be TDS probes, that is, water quality sensors. The control unit 263 can receive the detection information of the incoming water quality detection unit 271 and the outgoing water quality detection unit 272.

Step two: and acquiring the actual desalination rate based on the inlet water quality information and the outlet water quality information. Here, the water quality information detected by the inlet water quality detecting unit 271 is an inlet water TDS value, the outlet water quality detecting unit 272 is an outlet water TDS value, and the calculation formula of the actual desalination rate may be: actual salt rejection = (1-effluent TDS value/influent TDS value) × 100%.

Step three: and under the condition that the actual desalination rate exceeds the range of the target water desalination rate, adjusting the opening degree of a water outlet of at least one filter element in the composite filter element 222 so as to enable the actual desalination rate to be within the range of the target water desalination rate. In the step, the calculation result is compared with the target water quality desalination rate, and the opening degree of the water outlet of the filter element can be adjusted according to the comparison result, so that the purpose of adjusting the desalination rate is achieved.

According to the water quality adjusting method of the water purification system 1000 provided by the embodiment of the invention, the actual desalination rate is obtained by detecting the water quality at the water inlet end and the water outlet end of the water purification system 1000, the effluent water quality is compared with the target water quality desalination rate range, and if the comparison value has deviation, the effluent water quality can be corrected and compensated by adjusting the opening degree of the outlet of the filter element until the effluent water quality is matched with the target water quality desalination rate range.

According to some embodiments of the invention, the condition that the actual salt rejection is outside the target water salt rejection range includes two conditions, wherein one of the two conditions may be that the actual salt rejection is larger than the maximum value of the target water salt rejection range; another may be that the actual salt rejection is less than the minimum of the target water salt rejection range.

Specifically, when the outlet opening of at least one filter element in the composite filter element 222 is adjusted, specifically, when the actual desalination rate is greater than the maximum value of the target water desalination rate range, the outlet opening of at least one filter element in the composite filter element 222 is increased.

Of course, the adjusting of the outlet opening of at least one of the composite filter elements 222 specifically includes decreasing the outlet opening of at least one of the composite filter elements 222 when the actual desalination rate is less than the minimum value of the target water desalination rate range.

A water quality adjusting method of the water purifying system 1000 according to an embodiment of the present invention will be described in detail with reference to fig. 1 and 5.

Specifically, as shown in fig. 1, the water purification system 1000 includes a water inlet channel 210, a filtering channel 220, a water outlet channel 230, a wastewater channel 240, a booster pump 251, a regulating valve 252, a touch screen 255, a water inlet quality detection unit 271, a water outlet quality detection unit 272, and an electric control system 260. The composite filter element 222 comprises a plurality of filter element units 223 connected in parallel, the desalination rates of the plurality of filter element units 223 are different, and the regulating valve 252 is arranged at the water outlet of the filter element unit 223 with the lowest desalination rate. The touch screen 255 can be disposed at the faucet of the water purification system 1000 for the convenience of the user.

For convenience of description, the composite filter element 222 includes two filter element units 223, wherein one of the filter element units 223 is a high-desalination filter element, and the desalination rate is 95%; the other cartridge unit 223 is a low salt rejection cartridge and has a salt rejection of 40%. The control valve 252 is disposed at the water outlet of the low desalination rate filter element unit 223 for controlling the flow rate of the water outlet. The outlet water quality detecting unit 272 is disposed at the outlet passage 230, and the inlet water quality detecting unit 271 is disposed between the booster pump 251 and the pre-filter 221 for detecting the water quality.

As shown in fig. 1 and 5, a plurality of gear adjusting keys 262, such as high mineral water, low mineral water or purified water, may be disposed on the touch screen 255 for the user to select according to the requirement.

When the user selects a low-mineral water gear, the gear adjusting key 262 corresponding to the pure water gear on the touch screen 255 is clicked, and the control unit 263 receives an electric signal corresponding to the gear adjusting key 262; based on the electric signal, the control unit 263 sends a control instruction, the water inlet control valve 254 and the booster pump 251 are started, the opening degree of the regulating valve 252 is adjusted to be in a state of 30%, the water outlet control valve 233 is opened, and the water purification system 1000 outputs low-mineral water; meanwhile, the inlet water quality detection unit 271 is configured to detect the quality of water entering the composite filter element 222, the outlet water quality detection unit 272 is configured to detect the quality of water output by the water purification system 1000, detection data of the inlet water quality detection unit 271 and the outlet water quality detection unit 272 can be fed back to the control unit 263, the control unit 263 calculates the desalination rate of the purified water according to the fed-back data, and the calculation formula of the desalination rate can be: salt rejection = (1-effluent TDS value/influent TDS value) × 100%. And comparing the calculation result with the target water quality desalination rate.

The low-mineral effluent water quality desalination rate set point may be 78% -82%. If the calculated result of the desalination rate of the purified water is less than 78%, the control unit 263 sends out an instruction for adjusting the opening of the regulating valve 252, closes the angle by 2% on the basis of the original state, and then detects and compares the quality of the outlet water again until the desalination rate of the purified water meets the set 78% -82%; if the calculation result is greater than 82%, the control unit 263 sends out an instruction for adjusting the opening of the regulating valve 252, opens the angle of 2% again on the basis of the original state, and then detects and compares the effluent quality again until the desalination rate of the purified water meets the set value of 78% -82%; if the calculated result is 78% -82% and is consistent with the set value, the current state is maintained to continue water outlet, and the low-mineral water quality meeting the requirement is provided for the user.

When the user selects a high-mineral water gear, as shown in fig. 5, the gear adjusting key 262 corresponding to the pure water gear on the touch screen 255 is clicked, and the control unit 263 receives an electric signal corresponding to the gear adjusting key 262; based on the electric signal, the control unit 263 sends a control instruction, starts the water inlet control valve 254 and the booster pump 251, adjusts the opening degree of the regulating valve 252 to 100%, that is, the regulating valve 252 is in a fully open state, and then opens the water outlet control valve 233, so that the water purification system 1000 outputs high mineral water; meanwhile, the inlet water quality detection unit 271 is configured to detect the quality of water entering the composite filter element 222, the outlet water quality detection unit 272 is configured to detect the quality of water output by the water purification system 1000, detection data of the inlet water quality detection unit 271 and the outlet water quality detection unit 272 can be fed back to the control unit 263, the control unit 263 calculates the desalination rate of the purified water according to the fed-back data, and the calculation formula of the desalination rate can be: salt rejection = (1-effluent TDS value/influent TDS value) × 100%. And comparing the calculation result with the target water quality desalination rate.

In addition, because the operating principle of reverse osmosis needs to pressurize the water purification system 1000, the large-flux reverse osmosis water purification system 1000 comprises a booster pump 251, a water inlet electromagnetic valve, a high-voltage switch 232, a one-way valve 231, a waste water valve and the like, and a certain time is required from the time when the water purification system 1000 receives a water taking signal to the time when the water purification system stably supplies water, so that when a user opens a faucet to take water, the faucet firstly sprays a small part of residual water in a pipeline, then the user needs to wait for 2-3 seconds to stably supply the water, a current-off phenomenon exists in the middle of the water taking signal for 2-3 seconds, the user experience effect is poor, and the satisfaction degree of the user on the water purification machine is reduced.

To address this technical problem, according to some embodiments of the present invention, as shown in fig. 6 and 11, an air compression unit 130 is disposed in at least one of the front filter element 221, the composite filter element 222 and the rear filter element 100, when the water outlet channel 230 is connected, the air compression unit 130 is released, and water in the corresponding filter element is squeezed to the water outlet; when the water outlet passage 230 stops the flow, the air compressing unit 130 compresses.

From this, through set up compressible structure in that water purification system 1000 goes out the water in the twinkling of an eye, because the inside instantaneous pressure release of passageway, air compression unit 130 inflation and the inside water of extrusion filter core to can push out water fast, can guarantee like this to open tap and have stable continuous play water flow, solve "the phenomenon of cutting off when current water purification system 1000 water intaking, can promote user's satisfaction greatly.

As shown in fig. 6, according to some embodiments of the present invention, the filter cartridge includes a filter housing 110, a filter cartridge body 120, and an air compression unit 130. The filter shell 110 is provided with a first mounting cavity 112 and a second mounting cavity 113, the filter shell 110 is provided with a water inlet 114 and a water outlet 115, the water inlet path 121 is communicated with the water inlet 114, and the water outlet path 122 is communicated with the water outlet 115.

The filter element body 120 can be configured as a filter element within the first mounting cavity 112. The filter element body 120 and the filter shell 110 define a water inlet path 121 and a water outlet path 122, and water in the water inlet path 121 flows into the water outlet path 122 after being filtered by the filter element body 120. The air compression unit 130 is arranged in the second mounting cavity 113, a compression cavity 131 is defined between the outer side wall of the air compression unit 130 and the inner side wall of the second mounting cavity 113, the compression cavity 131 is communicated with the water inlet waterway 121, and when the air pressure inside the air compression unit 130 is greater than the water flow pressure in the compression cavity 131, the water in the compression cavity 131 is extruded and flows to the water outlet waterway 122. It should be noted that, in the process of expanding or compressing the air compressing unit 130, the volume of the compression chamber 131 changes, so that water squeezing and water replenishing can be realized. In some examples, the first and second mounting

cavities

112 and 113 are distributed along a length of the filter housing 110.

Therefore, at the moment that the water purification system 1000 discharges water, the air compression unit 130 expands, the volume of the compression cavity 131 is reduced, and water in the filter element is squeezed, so that water can be quickly pushed out, a stable and continuous water discharge flow rate can be ensured when the water faucet is opened, the problem of 'flow break' when the water purification system 1000 draws water is solved, and the satisfaction degree of a user can be greatly improved.

According to some embodiments of the present invention, to simplify the cartridge assembly process, the air compression unit 130 may be suspended within the first installation cavity 112. Of course, it should be noted that the installation manner of the air compression unit 130 is not limited to this, for example, in some embodiments, in order to improve the stability of the filter cartridge structure, the air compression unit 130 is fixedly connected to the inner wall of the first installation cavity 112.

In some embodiments, the air compression unit 130 may be an elastic bladder. The elastomeric bladder is a blow molded seal and may be an EVA bladder, a TPE bladder, or a TPU bladder. The elastic air bag is filled with air, can be compressed to be small when being pressed by pressure, and can rebound to return to the shape and size under the normal pressure state when the pressure is released. For example, referring to fig. 6, the resilient bladder is shown in a compressed state; referring to fig. 9, the elastic balloon is in an initial state.

Referring to fig. 6 and 7, in some embodiments, a cover plate 123 is disposed on the filter element body 120, the cover plate 123 divides the interior of the filter casing 110 into a first installation cavity 112 and a second installation cavity 113, and a through hole is disposed on the cover plate 123 and used for communicating the water inlet path 121 and the compression cavity 131. Thus, the water in the water inlet path 121 may enter the compression chamber 131, and the water in the compression chamber 131 may flow into the water outlet path 122 through the water inlet path 121.

Further, as shown in fig. 6 and 7, the cover plate 123 may include a main body portion 124, a flange portion 125, and a flange portion 126. Specifically, the main body 124 is attached to an end of the filter element body 120, the flange 125 is connected to a periphery of the main body 124, the flange 125 wraps an outer peripheral wall of the filter element body 120, the flange 126 is formed by bending an end of the flange 125 away from the main body 124, the flange 126 is located between an inner peripheral wall of the first mounting cavity 112 and the flange 125, and the through hole is formed in the flange 126.

Referring to fig. 15 to 17, a water purification system 1000 according to an embodiment of the present invention includes a water inlet passage 210, a water outlet passage 230, a filtering passage 220, a waste water passage 240, a check valve 231, a pressurizing pump 251, and a water inlet control valve 254.

Specifically, a high-pressure switch 232 is disposed on the water outlet passage 230, a front filter element 221, a filter element unit 223 and a rear filter element 100 are sequentially connected in series on the filtering passage 220, and the rear filter element 100 is the filter element described above. The rear filter element 100 is communicated with the water outlet passage 230, the front filter element 221 is communicated with the water inlet passage 210, the waste water passage 240 is communicated with the waste water outlet of the filter element unit 223, and the waste water passage 240 is provided with a waste water control valve 241.

In some examples, a composite filter element 222 may be disposed on the filter passage 220, and the composite filter element 222 includes a plurality of filter element units 223 connected in parallel. The check valve 231 is disposed between the cartridge unit 223 and the rear cartridge 100, the pressurizing pump 251 is disposed between the front cartridge 221 and the cartridge unit 223, and the water inlet control valve 254 is disposed at the water inlet passage 210, or the water inlet control valve 254 is disposed between the front cartridge 221 and the cartridge unit 223.

According to the water purification system 1000 of the embodiment of the invention, at the moment that the water purification system 1000 discharges water, the air compression unit 130 expands, the volume of the compression cavity 131 is reduced and water in the filter element is squeezed, so that water can be quickly pushed out, a stable and continuous water discharge flow can be ensured when a water tap is opened, the 'cutoff phenomenon' when the water purification system 1000 draws water is solved, and the satisfaction degree of a user can be greatly improved.

A filter cartridge and water purification system 1000 according to an embodiment of the present invention will be described in detail with reference to fig. 6 to 10 and fig. 15 to 17. It is to be understood that the following description is illustrative only and is not intended to be in any way limiting.

In this embodiment, referring to fig. 6, the filter element may be the rear filter element 100, that is, an elastic air bag is arranged in the rear filter element 100, and the rear filter element 100 may be installed downstream of the check valve 231, that is, the water flows through the check valve 231 and then flows to the rear filter element 100.

When the water purifier is in a standby state, the elastic air bag is in a compressed state because the pressure of 0.4-0.5Mpa exists in the rear filter element 100.

Fig. 7 shows the state of the elastic air bag expanding to squeeze out water when the tap is just opened to take water and trigger water production. In this figure, when the faucet is opened to take water, the pressure inside the rear filter element 100 is released, and the elastic air bag rebounds and expands to push the water inside the rear filter element 100 and the water in the rear pipeline of the rear filter element 100 out to the water intake of the faucet. Meanwhile, when the pressure inside the rear filter element 100 is reduced to be lower than 0.09Mpa, the high-pressure switch 232 is switched on and triggers the water purifier to start a water production state, referring to fig. 16, the water purification system 1000 sequentially opens the water inlet control valve 254 and the booster pump 251, purified water is discharged from the faucet, and the process from the water production triggered by the high-pressure switch 232 to the discharge of the purified water from the faucet requires 2 to 3 seconds.

Fig. 8 shows the elastic bladder expanded to its initial state when water is continuously produced. Referring to fig. 8, when the tap is opened to take water for more than 5 seconds, the internal pressure of the rear filter element 100 is lower than 0.05Mpa, and the elastic bladder is expanded to return to the normal pressure state.

Fig. 9 shows a state where the faucet is closed. When the water tap is closed and water is not taken, the water purification system 1000 is still in a water production state, at the moment, the elastic air bag in the rear filter element 100 is compressed by extrusion, the internal pressure of the rear filter element 100 rises, when the pressure rises to 0.3Mpa, the high-pressure switch 232 is switched off, the water purification system 1000 stops producing water, the water purification system 1000 sequentially switches off the booster pump 251 and the water inlet control valve 254, the process from the switching-off of the high-pressure switch 232 to the time when the water purification system 1000 stops producing water to enter a standby state takes about 0.5 second, at the moment, the internal pressure of the rear filter element 100 is between 0.4Mpa and 0.5Mpa, the elastic air bag of the rear filter element 100 is subjected to the extrusion force of 0.4Mpa and 0.5Mpa, and the elastic air bag is reduced under the action of the extrusion force. After the faucet is turned off, the resilient bladder is further compressed as shown in fig. 10.

Fig. 6 to 10 show different states of the elastic airbag. In addition, as shown in fig. 15, the standby state, the opening of the faucet for taking water, the continuous taking of water, and the closing of the faucet for stopping the taking of water are continuous cycles, and the elastic air bag inside the post-filter element 100 is in the processes of compression, rebound, return to the normal pressure state, compression and the like. Therefore, the stable and continuous water outlet flow can be ensured when a user boiling the water tap, and the satisfaction degree of the user can be greatly improved.

It should be noted that the configuration of the filter cartridge is not limited to this, and for example, in the example shown in fig. 11, the filter cartridge includes a filter casing 110, a filter cartridge body 120, and a storage tank 140. The filter housing 110 is internally provided with a first mounting cavity 112 and a second mounting cavity 113, the filter housing 110 is provided with a water inlet and a water outlet, the filter element body 120 is arranged in the first mounting cavity 112, the filter element body 120 and the filter housing 110 define a water inlet waterway 121 and a water outlet waterway 122, the water inlet waterway 121 is communicated with the water inlet, the water outlet waterway 122 is communicated with the water outlet, water in the water inlet waterway 121 flows into the water outlet waterway 122 after being filtered by the filter element body 120, the storage tank 140 is arranged in the second mounting cavity 113, the storage tank 140 is provided with a communication hole 141, water in the water inlet waterway 121 is suitable for entering the storage tank 140, the communication hole 141 is suitable for being sealed by water, and when the air pressure in the storage tank 140 is greater than the water pressure of the water inlet waterway 121, the water in the storage tank 140 is extruded and flows to the water outlet waterway 122. It will be appreciated that when the pressure inside the cartridge rises, the air in the reservoir 140 is compressed by the pressure, and when the pressure is released, the air in the reservoir 140 is vented to allow the water inside the cartridge to be pushed out quickly.

After the water purification system 1000 is installed in a user's place of use, the cartridge is installed in a horizontal manner (e.g., the orientation shown in fig. 11). Here, it should be noted that, in order to allow the water in the storage tank 140 to form an effective water seal at the communication hole 141, the water purification system 1000 is installed such that the communication hole 141 is located directly below the storage tank 140, and the water in the storage tank 140 can be discharged through the communication hole 141 by gravity when the air in the storage tank 140 is in a normal pressure state; when a certain amount of water is stored in the storage tank 140, the water is sealed at the communication hole 141 by gravity.

Of course, the position of the communication hole 141 is not particularly limited as long as it can satisfy the water sealing requirement of the storage tank 140, for example, in some embodiments, the filter element is of a cylindrical structure, the communication hole 141 can also be located at an end portion on a central axis of the filter element, and when the water purification system 1000 is installed, the filter element is arranged in a vertical direction, the central axis of the filter element extends in an up-and-down direction, the end surfaces of the storage tank 140 perpendicular to the central axis include two end surfaces, the two end surfaces are spaced apart in the up-and-down direction, and the communication hole 141 is located at an end surface below, so that when water enters the interior of the filter element, the water flows to the position of the communication hole 141 under the action of gravity, and forms a water seal at the communication hole 141 when the water enters the interior of the storage tank 140.

Therefore, at the moment when the water purification system 1000 discharges water, air inside the storage tank 140 expands to quickly push out water in the storage tank 140, so that stable and continuous water discharge flow can be ensured when a faucet is opened, the problem of 'cutoff phenomenon' when the water purification system 1000 draws water is solved, and the satisfaction degree of users can be greatly improved.

According to some embodiments of the present invention, the aperture of the communication hole 141 is 3mm to 20mm. Therefore, not only the water sealing effectiveness can be ensured, but also the water can smoothly flow out when the water in the storage tank 140 is squeezed out. In some embodiments, storage tank 140 may be secured within second mounting cavity 113, for example, storage tank 140 may be welded or snapped to bowl 110.

Referring to fig. 11, according to some embodiments of the present invention, the outer surface of the storage case 140 has the same shape as the inner surface of the second mounting cavity 113. For example, the outer surface of the storage box 140 is a cylindrical surface, and the inner surface of the second installation cavity 113 is a cylindrical surface, and the shapes of the two are the same. The storage box 140 may be a cylinder, the inside of the cylinder is hollow, and the end of the cylinder is in a sealed state, and a communication hole 141 may be formed in the circumferential wall of the cylinder, and the communication hole 141 is the only contact passage of air and water inside the filter element.

Referring to fig. 11, the filter housing 110 is provided with a positioning part 111 for marking an installation direction of the storage case 140, and the positioning part 111 is disposed opposite to the communication hole 141. In order to form a water seal at the communication hole 141, when the storage tank 140 is installed in the filter housing 110, the communication hole 141 is required to be directed downward, so that water can be collected at the communication hole 141 by gravity, thereby forming a water seal. By providing the positioning part 111, the positioning part 111 can be used as an assembly direction marking structure, so that the communication hole 141 and the positioning part 111 on the filter case 110 are ensured to be on the same plane. Further, the positioning part 111 may be a positioning rib provided on the outer circumferential wall of the filter housing 110. Thereby, the structure of the filter housing 110 can be simplified. The communication hole 141 of the storage case 140 is positioned in a vertically downward state by the positioning rib of the filter cartridge in actual use to form an effective water seal.

According to some embodiments of the present invention, referring to fig. 11, the filter casing 110 may include a casing 116 and an end cover 117, the casing 116 defines a first installation cavity 112 and a second installation cavity 113 therein, one end of the casing 116 is an open end 1161, the other end is a closed end 1162, the end cover 117 covers the open end 1161, the filter element body 120 abuts against the closed end 1162, the storage tank 140 is sandwiched between the filter element body 120 and the end cover 117, the end cover 117 is provided with a step 118, and the step 118 is engaged with and abuts against the storage tank 140.

When the filter cartridge is assembled, the filter cartridge body 120 is pushed into the filter housing 110, and then the storage box 140 is installed. When the storage case 140 is loaded, the communication hole 141 is aligned with the positioning part 111, and then the storage case 140 is pushed into the filter housing 110 to ensure that the communication hole 141 and the positioning part 111 are on the same plane. And finally, the upper end cover 117 is sleeved with the filter shell 110 in a spin welding manner, and the filter shell 110 is clamped by a tool fixture during the spin welding, so that the filter shell 110, the filter element body 120 and the storage tank 140 are in a relatively static state during the spin welding. The end cap 117 is friction welded to the filter flask by high speed rotation.

Referring to fig. 16 to 17, a water purification system 1000 according to an embodiment of the present invention includes a water inlet passage 210, a water outlet passage 230, a filtering passage 220, a waste water passage 240, a check valve 231, a pressurizing pump 251, and a water inlet control valve 254.

Specifically, a high-pressure switch 232 is arranged on the water outlet channel 230, a front filter element 221, a filter element unit 223 and a rear filter element 100 are sequentially connected in series on the filter channel 220, the rear filter element 100 is the filter element as described above, the rear filter element 100 is communicated with the water outlet channel 230, the front filter element 221 is communicated with the water inlet channel 210, the wastewater channel 240 is communicated with a wastewater outlet of the filter element unit 223, and a wastewater control valve 241 is arranged on the wastewater channel 240. A composite filter element 222 may be disposed on the filtering passage 220, and the composite filter element 222 includes a plurality of filter element units 223 connected in parallel. The check valve 231 is disposed between the cartridge unit 223 and the rear cartridge 100, the pressurizing pump 251 is disposed between the front cartridge 221 and the cartridge unit 223, and the water inlet control valve 254 is disposed at the water inlet passage 210, or the water inlet control valve 254 is disposed between the front cartridge 221 and the cartridge unit 223.

According to the water purification system 1000 of the embodiment of the invention, at the moment that the water purification system 1000 discharges water, air inside the storage tank 140 expands, and water in the storage tank 140 can be quickly pushed out, so that a stable and continuous water discharge flow can be ensured when a water tap is opened, the 'cutoff phenomenon' when the water purification system 1000 draws water is solved, and the satisfaction degree of a user can be greatly improved.

A filter cartridge and a water purification system 1000 according to an embodiment of the present invention will be described in detail with reference to fig. 11 to 17. It is to be understood that the following description is illustrative only and is not intended to be in any way limiting.

In this embodiment, referring to fig. 11, the filter cartridge may be a rear filter cartridge 100, i.e., a storage tank 140 is provided in the rear filter cartridge 100, and the rear filter cartridge 100 may be installed downstream of the check valve 231, i.e., the water flows through the check valve 231 and then flows toward the rear filter cartridge 100.

Referring to fig. 11, when the water purifier is in a standby state, since the pressure of 0.4Mpa-0.5Mpa exists inside the rear filter cartridge 100, the air inside the storage tank 140 is in a compressed state, and since the air inside the storage tank 140 is compressed and squeezed, part of water inside the filter cartridge enters the storage tank 140 through the communication hole 141.

Fig. 12 shows a state in which air in the storage tank 140 is expanded to push out water from the interior of the storage tank 140 when the tap is opened to take water. When the faucet is opened to take water, the pressure inside the rear filter element 100 is released, the air in the storage tank 140 expands to release pressure, and the water inside the rear filter element 100 and the water in the pipeline at the rear end of the rear filter element 100 are quickly pushed out to the water intake of the faucet. Meanwhile, when the pressure drops below 0.09Mpa, the high-pressure switch 232 is turned on and triggers the water purifier to start the water production state, the water purification system 1000 sequentially opens the water inlet control valve 254 and the booster pump 251, purified water is discharged from the faucet, and water production is triggered from the high-pressure switch 232 until purified water is discharged from the faucet, which takes 2-3 seconds. Since the air in the storage tank 140 is expanded, the water in the storage tank 140 can be squeezed out, and thus the water stored in the rear filter cartridge 100 can be rapidly pushed out, which can ensure a stable and continuous outlet flow rate when the faucet is opened.

Fig. 13 shows a state where the faucet is opened to take water for more than 5 seconds, and the internal pressure of the rear cartridge 100 is lower than 0.05Mpa, at this time, the air in the storage tank 140 is basically decompressed to the normal pressure state, and the water in the storage tank 140 is also squeezed out through the communication hole 141.

Fig. 14 shows the water purification system 1000 still in the water production state when the water tap is turned off and water intake is stopped. At this time, air in the storage tank 140 in the rear filter element 100 is compressed by compression, the internal pressure of the rear filter element 100 rises, when the pressure rises to 0.3Mpa, the high-pressure switch 232 is turned off, the water purification system 1000 stops water production, the water purification system 1000 sequentially turns off the booster pump 251 and the water inlet control valve 254, the process from the turning-off of the high-pressure switch 232 to the turning-off of the water purification system 1000 to the standby state takes about 0.5 second, the internal pressure of the rear filter element 100 is 0.4Mpa-0.5Mpa, the air in the storage tank 140 is compressed by 0.4Mpa-0.5Mpa, and simultaneously, as the air in the storage tank 140 is compressed and compressed, a part of water enters the storage tank 140 through the communication hole 141.

The above embodiments are only for illustrating the present invention and are not to be construed as limiting the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.

Claims

1. A water purification system, comprising:

a water inlet channel;

the water outlet of at least one of the at least two filter element units is provided with the regulating valve, the opening of the regulating valve is adjustable and is suitable for regulating the flow of the corresponding filter element unit so as to regulate the desalination rate of the water quality in the water outlet channel;

the flow limiting valve is arranged at a wastewater outlet of at least one of the at least two filter element units, and the flow limiting valve is arranged at a wastewater outlet of the filter element unit with the lowest desalination rate.

2. The water purification system of claim 1, wherein the regulating valve is disposed at the outlet of the lowest salt rejection filter element unit.

3. The water purification system of claim 1, wherein the filter element unit is a reverse osmosis filter element, an ultrafiltration filter element, a nanofiltration filter element, a carbon rod filter element or a carbon fiber composite filter element.

4. The water purification system of claim 1, comprising a plurality of gear adjustment keys, each gear adjustment key corresponding to a different opening value of the adjustment valve, each gear corresponding to a different salt rejection water quality.

5. The water purification system of claim 4, further comprising a touch screen, wherein the touch screen is arranged at the tail end of the water outlet channel, and the gear adjusting key is arranged on the touch screen.

6. The water purification system of claim 1, further comprising a water inlet control valve disposed on the water inlet channel, or wherein the water inlet control valve is disposed between the pre-filter and the composite filter.

7. The water purification system of any one of claims 1-6, wherein at least one of the pre-filter element, the composite filter element and the post-filter element has an air compression unit therein, and when the water outlet channel is communicated, the air compression unit is released and squeezes water in the corresponding filter element to the water outlet; when the water outlet channel is cut off, the air compression unit compresses.

8. The water purification system of claim 7, wherein the air compression unit is an elastomeric bladder.

9. The water purification system of claim 7, wherein the air compression unit is a storage tank having air stored therein and provided with communication holes adapted to be sealed by water in the corresponding cartridges.

10. A water purifier, characterized by comprising a water purification system according to any one of claims 1-9.