Purified water dispenser

Abstract

The invention discloses a purified water dispenser which comprises a water softening system communicated with a raw water inlet and provided with a first soft water outlet channel; the water purification system is communicated with the first soft water outlet channel; the second mineral water pipeline is directly or indirectly communicated with the raw water inlet; a water inlet of the hot water system is communicated with a pure water outlet of the water purification system, and the hot water system is used for providing hot water softened by the water softening system and purified by the water purification system for a user.

Description

Technical Field

[0001] The present invention relates to the technical field of drinking water devices, and particularly relates to a water purifier. Background Art

[0002] In the related technical field, a water purifier can only provide pure water, and the water body is single, which is difficult to meet different water use requirements. Summary of the Invention

[0003] An embodiment of the present application provides a water purifier that can meet the diverse water use requirements of users.

[0004] An embodiment of the present application provides a water purifier, including:

[0005] A soft water system, which is communicated with a raw water inlet and has a first soft water outlet channel;

[0006] A water purification system, which is communicated with the first soft water outlet channel; and

[0007] A second mineral water pipeline, which is directly or indirectly communicated with the raw water inlet; and

[0008] A hot water system, whose inlet is communicated with the pure water outlet of the water purification system, and is used to provide hot water softened by the soft water system and purified by the water purification system to users.

[0009] In some embodiments, the second mineral water pipeline includes:

[0010] A second mineral water pipe, which is directly or indirectly communicated with the raw water inlet;

[0011] A primary filter element, which is arranged on the second mineral water pipe; and

[0012] A second on-off valve, which is arranged on the second mineral water pipe to control the on-off of the second mineral water pipe.

[0013] In some embodiments, the second mineral water pipeline further includes:

[0014] A flow limiting plug, which is arranged on the second mineral water pipe.

[0015] In some embodiments, the water purification system includes:

[0016] A pre-filter element, the primary filter element is the pre-filter element, or the primary filter element and the pre-filter element are different filter elements.

[0017] In some embodiments, the water purification system further includes:

[0018] A reverse osmosis filter element, which is communicated with the outlet of the pre-filter element.

[0019] In some of these embodiments, the water purification system further includes:

[0020] A post-filter, having an inlet connected to the outlet of the reverse osmosis filter and an outlet connected to the hot water system.

[0021] In some of these embodiments, the water purification system includes:

[0022] A three-way control valve, having a first water inlet connected to the first soft water outlet channel, a second water inlet connected to the raw water inlet, and a water outlet connected to the primary filter.

[0023] In some of these embodiments, the soft water system includes:

[0024] A soft water valve, including a raw water inlet channel and the first soft water outlet channel, with the raw water inlet channel connected to the raw water inlet;

[0025] A resin tank, connected to the raw water inlet channel and the first soft water outlet channel, and configured to convert hard water into soft water;

[0026] Wherein, the raw water outlet channel is connected to the raw water inlet channel to direct a part of the raw water entering the raw water inlet channel to directly flow out of the raw water outlet channel, and the second mineral water pipeline is connected to the raw water inlet through the raw water outlet channel.

[0027] In some of these embodiments, the soft water valve includes a main valve body, and the main valve body includes a raw water inlet connection pipe having the raw water inlet channel;

[0028] The main valve body includes a raw water outlet connection pipe having the raw water outlet channel, and the raw water outlet connection pipe is disposed on the raw water inlet connection pipe to connect the raw water outlet channel and the raw water inlet channel.

[0029] In some of these embodiments, the soft water valve further includes:

[0030] A second soft water outlet channel, connected to the resin tank and configured to discharge soft water.

[0031] In some of these embodiments, the second soft water outlet channel is connected to the first soft water outlet channel to direct a part of the soft water entering the first soft water outlet channel to directly flow out of the first soft water outlet channel.

[0032] In some of these embodiments, the soft water valve includes a main valve body, and the main valve body includes a first soft water outlet connection pipe having the first soft water outlet channel;

[0033] The main valve body includes a second softened water outlet pipe, the second softened water outlet pipe has the second softened water passage, and the second softened water outlet pipe is arranged on the first softened water outlet pipe so that the first softened water passage communicates with the second softened water passage.

[0034] In some embodiments, the softened water valve includes a main valve body, the main valve body includes a first valve housing, a raw water inlet pipe, and a first softened water outlet pipe, the raw water inlet pipe has the raw water passage, and the first softened water outlet pipe has the first softened water passage;

[0035] The first valve housing has a main chamber, the raw water inlet pipe and the first softened water outlet pipe are respectively connected to the first valve housing, and the raw water passage communicates with the main chamber;

[0036] The softened water valve further includes a valve core, the valve core is arranged in the main chamber and is used to adjust the on-off of the main chamber and the resin tank or salt tank of the water purifier.

[0037] In some embodiments, the primary filter element includes any one of a PP cotton filter element, an activated carbon filter element, an ultrafiltration filter element, a composite filter element, and a quartz sand filter element, and the reverse osmosis filter element includes a RO filter element.

[0038] In some embodiments, the water purification system further includes:

[0039] A booster pump, located upstream of the reverse osmosis filter element and used to boost the pressure of the softened water flowing through the reverse osmosis filter element.

[0040] In some embodiments, the water purification system further includes:

[0041] A pure water quality detector, arranged downstream of the reverse osmosis filter element and used to detect the total dissolved solid value of the pure water; and

[0042] A pure water return pipeline, connecting the downstream of the reverse osmosis filter element and the upstream of the booster pump, and capable of returning the filtered pure water to the upstream of the booster pump for secondary filtration.

[0043] In some embodiments, the pure water return pipeline includes:

[0044] A pure water return pipe, connecting the downstream of the reverse osmosis filter element and the upstream of the booster pump, and used to partially return the filtered pure water to the upstream of the booster pump for secondary filtration; and

[0045] A pure water return control member, installed on the pure water return pipe and used to control the on-off and flow rate of the returned water.

[0046] The water purifier based on the embodiments of the present application directly outputs softened water through the second softened water outlet channel of the soft water system, meeting the domestic water demand for washing, bathing, etc., and avoiding the scale problem caused by hard water; through the water purification system, pure water can be provided to ensure the purity and safety of the direct drinking water; at the same time, the mineral water pipeline retains the natural trace elements in the raw water, providing users with a drinking water option to supplement minerals; in addition, the hot water system can also provide hot pure water for users. This separate quality design not only solves the problem of "over-pure water" caused by the complete removal of minerals by traditional water purifiers, but also avoids the damage to the equipment caused by hard water, achieving a balance between health needs and practical functions. Moreover, the soft water pretreatment can significantly reduce the burden on the water purification system. For example, before the softened water enters the RO reverse osmosis membrane, the scale-forming calcium and magnesium ions have been removed, which can delay membrane fouling, improve desalination efficiency, extend the filter element life, and at the same time reduce the waste water generated due to membrane blockage. Since the hot water system uses pure water, the heating pipe and the inner tank are not easily fouled, the heat transfer efficiency is stable, and the energy consumption and maintenance frequency are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0048] Figure 1 Schematic structural diagram of the water purifier in an embodiment of the present application;

[0049] Figure 2 Schematic internal structural diagram of the water purifier in an embodiment of the present application from one perspective;

[0050] Figure 3 Schematic internal structural diagram of the water purifier in an embodiment of the present application from another perspective;

[0051] Figure 4 Schematic water circuit structure diagram of the water purifier in an embodiment of the present application;

[0052] Figure 5 Schematic water circuit structure diagram of the water purifier in another embodiment of the present application;

[0053] Figure 6 Schematic water circuit structure diagram of the water purifier in still another embodiment of the present application;

[0054] Figure 7 Exploded structural diagram of the water purifier in an embodiment of the present application;

[0055] Figure 8Schematic structural diagram of a soft water valve according to an embodiment of the present application;

[0056] Figure 9 Exploded structural diagram of a soft water valve according to an embodiment of the present application;

[0057] Figure 10 Cross-sectional structural diagram of a soft water valve according to an embodiment of the present application;

[0058] Figure 11 Another schematic structural diagram of a soft water valve according to an embodiment of the present application;

[0059] Figure 12 Another cross-sectional structural diagram of a soft water valve according to an embodiment of the present application.

[0060] Explanation of the reference numerals in the drawings:

[0061] 001, water purifier; 1A, faucet; 10, housing assembly; 10A, inner cavity; 002, soft water system; 010, resin tank; 020, soft water valve; 021, main valve body; 0211, raw water inlet pipe; 0211A, raw water inlet channel; 0212, first soft water outlet pipe; 0212A, first soft water outlet channel; 0213, raw water outlet pipe; 0213A, raw water outlet channel; 0214, second soft water outlet pipe; 0214A, second soft water outlet channel; 0215, first valve housing; 0215A, main chamber; 0215B, first liquid passage; 0215C, second liquid passage; 0215D, third liquid passage; 022, sub-valve body; 0221, second valve housing; 0221A, fourth liquid passage; 0221B, fifth liquid passage; 0221C, sixth liquid passage; 0222, first tank connection pipe; 0222A, first tank channel; 0223, second tank connection pipe; 0223A, second tank channel; 0224, salt tank connection pipe; 0224A, salt passage; 0225, sewage connection pipe; 023, valve core assembly; 0231, valve core; 0232, drive part; 024, jet assembly; 030, salt tank; 003, pure water system; 561, pure water return pipe; 562, pure water return control part; 0034, pure water quality detection part; 003a, pure water discharge valve; 50, filtration system; 5011, pre-filter element; 502, reverse osmosis filter element; 54, waste water drainage pipeline; 541, waste water drain pipe; 542, waste water valve; 80, booster pump; 57, pipeline machine; 004, hot water system; 20, hot water tank assembly; 006, mineral water pipeline; 0062, second mineral water pipe; 0063, primary filter element; 0065, second on-off valve; 0066, flow limiting plug; 0067, three-way control valve; X, first direction; Y, second direction.

[0062] The implementation, functional features, and advantages of the present invention will be further described in conjunction with embodiments and with reference to the accompanying drawings. Detailed implementation manners

[0063] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will further describe in detail the embodiments of the present application with reference to the accompanying drawings.

[0064] When the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present invention. On the contrary, they are merely examples of devices and methods that are consistent with some aspects of the present invention as detailed in the appended claims.

[0065] In the description of the present invention, it should be understood that terms such as "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise stated, "a plurality of" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0067] Please refer to Figures 1-4 , the embodiments of the present application provide a water purifier 001, and the water purifier 001 includes a housing assembly 10, a soft water system 002, a water purification system 003, a hot water system 004, and a mineral water pipeline 006.

[0068] The housing assembly 10 has an inner cavity 10A, and the soft water system 002, the purified water system 003, the hot water system 004, and the mineral water pipeline 006 are all installed in the inner cavity 10A to protect the soft water system 002, the purified water system 003, the hot water system 004, and the mineral water pipeline 006 by using the housing assembly 10, and the probability of damage to the soft water system 002, the purified water system 003, the hot water system 004, and the mineral water pipeline 006 can be reduced. It can be understood that the material of the housing assembly 10 can be at least one of metal and plastic. Exemplarily, the material of the housing assembly 10 can be metal, so that the housing assembly 10 as a whole has high structural strength, the probability of damage to the housing assembly 10 can be reduced, and further the probability of damage to the soft water system 002, the purified water system 003, the hot water system 004, and the mineral water pipeline 006 can be reduced, so that the water purifier 001 can have a long service life. The material of the housing assembly 10 can also be plastic, and its weight and material cost can be reduced while ensuring the structural strength.

[0069] As a water quality pretreatment unit, the soft water system 002 includes a soft water valve 020, a resin tank 010, and a salt tank 030. The soft water valve 020 has a raw water inlet channel, a raw water outlet channel 0213A, and a first soft water outlet channel 0212A. The raw water inlet channel is used to connect the raw water inlet and the resin tank 010 to convey the incoming raw water to the resin tank 010 for softening. The raw water outlet channel 0213A is connected to the raw water inlet channel and is used to output the raw water that has not been softened by the resin tank 010. The soft water valve 020 may further include a channel connecting the salt tank 030 and the resin tank 010; the resin tank 010 is used to soften hard water into soft water; the salt tank 030 is used to store regeneration salt, and the regeneration salt can enter the resin tank 010 through the soft water valve 020 to regenerate the resin in the resin tank 010.

[0070] Please refer to Figure 4 , the water purifier 001 may further include a controller. When the soft water mode is started, the controller can control the opening of the raw water inlet channel. At this time, the hard water can enter the resin tank 010 through the soft water valve 020. The sodium ions on the resin in the resin tank 010 can exchange with the calcium and magnesium ions in the hard water, thereby adsorbing the calcium and magnesium ions, turning the hard water into soft water, and storing it in the resin tank 010.

[0071] When all the sodium ions on the resin become calcium and magnesium ions, the resin reaches a saturated state. At this time, the resin loses the ability to soften hard water, and the controller can control the soft water system 002 to start the regeneration mode. It can be understood that the controller can control the soft water system 002 to start the regeneration program at preset time intervals to regenerate the resin, so as to ensure that the user can obtain soft water. Exemplarily, the preset time can be 12 hours, 24 hours, 36 hours, etc. In the embodiments of the present application, the preset time is not specifically limited.

[0072] Please refer to Figure 4 When the regeneration mode is started, the controller controls the first softened water outlet channel 0212A to close, and controls the soft water valve 020 to connect the raw water inlet channel and the salt tank, so that the raw water contacts the regeneration salt in the salt tank 030, and melts the regeneration salt to form brine. In another embodiment, the controller can also control the soft water valve 020 to connect the resin tank 010 and the salt tank 030. At this time, the hard water enters the resin tank 010 through the soft water valve 020, and enters the salt tank 030 from the resin tank 010 through the soft water valve 020. After the water in the resin tank 010 enters the salt tank 030, it contacts the regeneration salt in the salt tank 030, and melts the regeneration salt to form brine. The soft water valve 020 can suck the brine in the salt tank 030 into the resin tank 010 to replace the calcium and magnesium ions on the resin with the sodium ions in the brine, so as to restore the softening ability of the resin.

[0073] The water purification system 003 can include multiple filter elements, and the multiple filter elements can be independently arranged or integrated into a composite filter element. Please refer to Figures 1-4 More specifically, the water purification system 003 can include a filtration system 50. The filtration system 50 includes a primary filter element and a secondary filter element. The primary filter element can be a pre-filter element 5011, and the secondary filter element can be a reverse osmosis filter element 502. The water inlet of the pre-filter element 5011 is connected to the water inlet of the filtration system 50, the water outlet of the pre-filter element 5011 is connected to the water inlet of the reverse osmosis filter element 502, and the water outlet of the reverse osmosis filter element 502 is connected to the water outlet of the filtration system 50.

[0074] The above-mentioned first softened water outlet channel 0212A is connected to the water inlet of the water purification system 003, that is, connected to the pre-filter element 5011. The soft water system 002 can soften the hard water rich in calcium and magnesium ions into soft water, that is, the soft water system 002 can adsorb the calcium and magnesium ions in the hard water, so that the first softened water outlet channel 0212A outputs soft water to the water purification system 003. In this way, the probability of a large amount of calcium and magnesium ions accumulating at the filter element of the water purification system 003 can be reduced to ensure that the filter element has a normal service life. After the soft water is filtered by the water purification system 003, it can provide pure water to users. The soft water valve 020 also includes a second softened water outlet channel 0214A, and the second softened water outlet channel 0214A is connected to the resin tank 010, and the second softened water outlet channel 0214A can provide soft water to users.

[0075] The pre-filter element 5011 is the first filter barrier of the water purification system 003, and is mainly used for preliminary filtration of the softened water output by the soft water system 002. Its core function is to intercept large particles such as mud, rust, worm eggs, and red worms in the soft water to prevent these impurities from entering the subsequent reverse osmosis filter element 502, thereby extending the service life of the reverse osmosis membrane and improving the filtration efficiency. The pre-filter element 5011 can be of various types, including PP cotton filter element (polypropylene melt-blown filter element), activated carbon filter element, ultrafiltration filter element, composite filter element or quartz sand filter element. Each filter element has different filtration characteristics: PP cotton filter element removes large particles of impurities through physical interception; activated carbon filter element absorbs residual chlorine, odor and some organic matter; ultrafiltration filter element can further intercept colloids and microorganisms; composite filter element combines multiple filter materials to provide a more comprehensive pretreatment effect; quartz sand filter element is suitable for the preliminary filtration of high turbidity water sources. This diverse pre-filter 5011 configuration can be flexibly selected according to specific water quality conditions and user needs, ensuring that the water purification system 003 can operate efficiently and stably in different environments.

[0076] The reverse osmosis filter element 502 has a reverse osmosis membrane, which can be an artificial semipermeable membrane. The pore size of the reverse osmosis membrane is very small, usually below 0.0001 microns. This ultra-micropore structure enables the reverse osmosis membrane to efficiently intercept various impurities such as dissolved salts, colloids, microorganisms, organic matter, etc. in water. Driven by the pressure provided by the booster pump 80, water molecules can pass through the reverse osmosis membrane, while most of the soluble solids, heavy metal ions, bacteria, viruses and organic pollutants are intercepted and discharged with the wastewater. This efficient filtering mechanism enables the reverse osmosis filter element 502 to produce high-purity drinking water, meeting the user's strict requirements for water quality safety and health. .

[0077] In other embodiments, the filtration system 50 may further include a post-filter element, the water inlet of the post-filter element is connected to the water outlet of the reverse osmosis filter element 502, and the water outlet of the post-filter element is connected to the water outlet of the filtration system 50. The post-filter element is used to absorb odor and residual chlorine, and can be used to improve the taste of normal temperature water. The post-filter element can be set with reference to the form of the pre-filter element 5011. It can be understood that the pre-filter element 5011 and the post-filter element can be integrated into a primary filter element, so that when the user replaces the primary filter element, the pre-filter element 5011 and the post-filter element can be replaced together, thereby improving the filter element replacement efficiency.

[0078] It is understandable that, in the embodiment of the present application, the filtration system 50 may also only include the reverse osmosis filter element 502, and use the reverse osmosis filter element 502 to filter impurities in the water at one time to provide pure water for the user.

[0079] Please refer to Figures 1-4, To facilitate the export of impurities removed by the filtration system 50, the water purification system 003 further includes a waste water drainage pipeline 54. The waste water drainage pipeline 54 includes a waste water drain pipe 541 and a waste water valve 542. The waste water drain pipe 541 is communicated with the waste water outlet of the filtration system 50, and the waste water valve 542 is arranged on the waste water drain pipe 541. The waste water valve 542 is used to control the discharge of waste water.

[0080] It can be understood that the waste water drainage pipeline 54 can be communicated with the waste water outlet of the pre-filter element 5011 and the waste water outlet of the reverse osmosis filter element 502. In other embodiments, the waste water drainage pipeline 54 can also be only communicated with the waste water outlet of the reverse osmosis filter element 502.

[0081] Please refer to Figures 1-4 , Further, since the reverse osmosis filter element 502 has requirements for working water pressure, the water purification system 003 further includes a booster pump 80. The booster pump 80 is arranged upstream of the reverse osmosis filter element 502 and can boost the water pressure to the working pressure range required by the reverse osmosis membrane, ensuring that the reverse osmosis membrane can work normally and achieving stable water production and good filtration effect. Among them, the booster pump 80 adopts a variable frequency booster pump, which can dynamically adjust the operating frequency and output pressure according to the actual needs of the water purification system 003. The variable frequency booster pump, through the built-in intelligent control system, real-time monitors the working state and inlet water pressure of the reverse osmosis filter element 502, and automatically adjusts the pump speed to ensure that the reverse osmosis membrane is always within the optimal working pressure range. This not only improves the filtration efficiency and water production stability of the reverse osmosis filter element 502, but also significantly reduces energy consumption, avoiding the energy waste and equipment wear caused by the frequent start and stop of traditional fixed frequency pumps. In addition, the running noise of the variable frequency booster pump is lower, further improving the user experience. Through intelligent pressure regulation and energy-saving operation, the variable frequency booster pump provides efficient, stable and environmentally friendly power support for the water purification system 003.

[0082] Furthermore, the water purification system 003 can also include a pure water return pipeline and a pure water quality detector 0034. Among them, the pure water quality detector 0034 is arranged downstream of the reverse osmosis filter element 502 and is used to detect the total dissolved solids value (TDS value) of the pure water filtered by the reverse osmosis filter element 502. The pure water return pipeline is communicated with the downstream of the reverse osmosis filter element 502 and the upstream of the booster pump 80, and can partially return the filtered pure water to the upstream of the booster pump 80 for secondary filtration. Specifically, when the pure water quality detector 0034 detects that the total dissolved solids value of the pure water exceeds the preset threshold, the controller will start the pure water return pipeline, re-transport the unqualified pure water to the upstream of the booster pump 80, and filter it again through the reverse osmosis filter element 502 until the TDS value of the pure water reaches the standard, ensuring the stability of the outlet water quality.

[0083] The pure water return pipeline includes a pure water return pipe 561 and a pure water return control component 562. The pure water return pipe 561 connects the downstream of the reverse osmosis filter element 502 and the upstream of the booster pump 80, and is used to partially return the filtered pure water to the upstream of the booster pump 80 for secondary filtration. The pure water return control component 562 is installed on the pure water return pipe 561 and is used to control the on / off and flow rate of the returned water. Among them, the pure water return control component 562 can adopt a pure water return check valve to ensure that the water flow only flows in the return direction and avoid reverse contamination.

[0084] The water purification system 003 further includes a pure water outlet valve 003a. The water inlet of the pure water outlet valve 003a is connected to the water outlet of the filtration system 50 and is used to control the discharge of pure water. By adjusting the opening and closing state, the pure water outlet valve 003a can accurately control the output flow rate and timing of pure water. When the user needs to use pure water, the pure water outlet valve 003a opens, and the pure water generated by the filtration system 50 flows through the pure water outlet valve 003a to other water outlet terminals for the user to directly drink or use. When the system detects that there is no need for water supply, the pure water outlet valve 003a closes to avoid wasting water resources.

[0085] The mineral water pipeline 006 can be directly connected to the raw water inlet or indirectly connected to the raw water inlet. For example, it can be connected to the raw water inlet by connecting to the raw water channel 0213A. The mineral water pipeline 006 includes a second mineral water pipe 0062, a primary filter element 0063, and a second on / off valve 0065. The second mineral water pipe 0062 is connected to the raw water channel 0213A; the primary filter element 0063 is arranged in the second mineral water pipe 0062; the second on / off valve 0065 is arranged in the second mineral water pipe 0062 to control the on / off of the second mineral water pipe 0062. The mineral water pipeline 006 directly introduces raw water and only conducts basic filtration through the primary filter element 0063 (which can be set in the form of the pre-filter element 5011, such as PP cotton or activated carbon) to remove impurities such as sediment, rust, and residual chlorine, while completely retaining natural minerals such as calcium, magnesium, and potassium in the water. This limited treatment method avoids the complete stripping of trace elements by deep purification technologies (such as RO reverse osmosis) and provides drinking water with a quality closer to natural mineral water, which is especially suitable for daily drinking to supplement the nutrients required by the human body.

[0086] In specific implementations, the primary filter element 0063 and the pre-filter element 5011 can be the same filter element or two independent filter elements. When using the same filter element, both the raw water outlet channel 0213A and the first softened water outlet channel 0212A of the soft water valve 020 are connected to this filter element. When the soft water valve 020 outputs raw water, the raw water flows to the outlet of the mineral water pipe after being filtered by this filter element; when the soft water valve 020 outputs softened water, the softened water flows to the water purification system 003 after being filtered by this filter element. This solution can reduce the number of filter elements and effectively reduce the volume of the water purifier 001. In the solution where the primary filter element 0063 and the pre-filter element 5011 are two independent filter elements, the raw water outlet channel 0213A is connected to the primary filter element 0063, and the first softened water outlet channel 0212A is connected to the pre-filter element 5011. This solution not only simplifies the filter element configuration but also ensures independent filtration paths for mineral water and softened water, meeting the user's requirements for different water qualities.

[0087] The water purification system 003 can also include a three-way control valve 0067. The first inlet end of the three-way control valve 0067 is connected to the first softened water outlet channel 0212A for receiving softened water; the second inlet end is connected to the raw water inlet for introducing untreated hard water. The outlet end of the three-way control valve 0067 is connected to the primary filter element 0063 to deliver the selected water source to the pre-filter element 5011. By switching the three-way control valve 0067, the user can select to use softened water or raw water as the inlet water source of the water purification system 003 according to actual needs. For example, when high-purity pure water is required, softened water can be selected as the inlet water to reduce the scaling risk of the reverse osmosis filter element 502; when minerals need to be retained, the raw water inlet can be switched, and the mineral water can be directly output after being filtered by the primary filter element 0063. This design not only improves the adaptability of the water purification system 003 but also provides the user with more water quality options to meet diverse water usage needs.

[0088] The mineral water pipeline 006 can also include a flow-limiting plug 0066. The flow-limiting plug 0066 is arranged in the second mineral water pipe 0062 and limits the maximum flow rate of the mineral water pipe through a fixed aperture or an adjustable structure, eliminating the problem of sudden large and small water output caused by fluctuations in raw water pressure (such as changes in municipal water supply pressure) and ensuring uniform water flow. In addition, when the second on-off valve 0065 is suddenly opened or closed, the flow-limiting plug 0066 can buffer the water flow impact, reducing the risk of pipeline vibration and joint leakage, thereby improving the reliability and durability of the system.

[0089] The hot water system 004 is connected to the water purification system 003 and is used to store and heat the filtered pure water, so as to meet the user's demand for hot water at any time, improving the functionality and practicality of the device. The hot water system 004 may include structures such as a hot water tank assembly 20 and a water pump. In the related art, the hot water system 004 in the water purifier 001 that can heat water has been publicly known, and will not be elaborated in this application.

[0090] Please refer to Figure 4 , it can be understood that the water purifier 001 may further include a pipeline machine 57. After passing through the one-way valve, the normal temperature water can also enter the pipeline machine 57 to supply water to the pipeline machine 57. The pipeline machine 57 can also directly provide hot water or cold water.

[0091] In this application, softened water is directly output through the second softened water outlet channel 0214A of the softened water system 002 to meet the needs of domestic water such as washing and bathing, avoiding the scale problem caused by hard water; through the water purification system 003, pure water can be provided to ensure the purity and safety of direct drinking water; at the same time, the mineral water pipeline 006 retains the natural trace elements in the raw water, providing users with the choice of drinking water to supplement minerals; in addition, the hot water system 004 can also provide hot pure water for users. This separate quality design not only solves the problem of "over-pure water" caused by the complete removal of minerals by traditional water purifiers, but also avoids the damage of hard water to the device, achieving a balance between health needs and practical functions. Moreover, the softened water pretreatment can greatly reduce the burden on the water purification system 003. For example, before the softened water enters the RO reverse osmosis membrane, the scale-forming calcium and magnesium ions have been removed, which can delay membrane fouling, improve desalination efficiency, extend the service life of the filter element, and reduce the waste water generated due to membrane blockage. Since the hot water system 004 uses pure water, the heating tube and the inner tank are not easily fouled, the heat transfer efficiency is stable, and the energy consumption and maintenance frequency are reduced.

[0092] The water purifier 001 may include a faucet 1A, and the faucet 1A is integrated on the housing assembly 10. Of course, the water purifier 001 may not include the faucet 1A, but be connected to an external faucet 1A (such as in the kitchen). Specifically, the faucet 1A can selectively connect or combinatorially connect or both connect to the water outlet end of the mineral water pipeline 006, the water outlet end of the water purification system 003, the water outlet end of the softened water system 002, and the water outlet end of the hot water system 004. In this way, when the user takes pure water from the faucet 1A, the softened water in the resin tank 010 can flow out through the first softened water outlet channel 0212A of the softened water valve 020 and enter the water purification system 003. After being filtered by the water purification system 003, the softened water can be directly output to the faucet 1A to provide normal temperature pure water for the user; after being filtered by the water purification system 003, the softened water can also be output to the hot water tank assembly 20 or the pipeline machine 57 for heating, and then output to the faucet 1A through the hot water tank assembly 20 to provide hot water for the user, or directly provide hot water for the user through the pipeline machine 57.

[0093] It can be understood that the water purifier 001 may have two faucets 1A. One faucet 1A is connected to the hot water system 004, and the other faucet 1A is connected to the water purification system 003, so that hot water and normal temperature water can be provided to users separately. In other embodiments, the faucet 1A may also be respectively connected to the hot water system 004 and the water purification system 003, and the switch is used to control the hot water or normal temperature water flowing out of the faucet 1A.

[0094] It can be understood that the faucet 1A may also be an intelligent faucet 1A. After the controller detects a signal for taking normal temperature water at the intelligent faucet 1A or a water replenishment signal of the hot water system 004, the controller can control the water purification system 003 to start water production, so as to ensure that users can obtain normal temperature water and hot water from the intelligent faucet 1A in time, reduce the waiting time of users, and improve the user experience.

[0095] In order to facilitate the connection of the soft water valve 020 to structures such as raw water, the water purification system 003, the resin tank 010, and the mineral water pipeline 006, the present application further improves the soft water valve 020, and the following is a description thereof.

[0096] Please refer to Figures 7-8 , the soft water valve 020 includes a valve housing. The valve housing has a raw water inlet channel 0211A and a first soft water outlet channel 0212A. The raw water inlet channel 0211A is used to receive raw water, and the first soft water outlet channel 0212A is used to receive the soft water generated after the raw water is treated by the resin tank 010 of the water purifier 001. Wherein, the valve housing further has a raw water outlet channel 0213A and a second soft water outlet channel 0214A. The raw water outlet channel 0213A is connected to the raw water inlet channel 0211A to direct a part of the raw water entering the raw water inlet channel 0211A to directly flow out of the raw water inlet channel 0211A, and the second soft water outlet channel 0214A is connected to the first soft water outlet channel 0212A to direct a part of the soft water entering the first soft water outlet channel 0212A to directly flow out of the first soft water outlet channel 0212A.

[0097] In the embodiment of the present application, the soft water valve 020 can shunt and output raw water and soft water. The output raw water and soft water can both flow to the pre-filter 5011, and then the raw water flows to the mineral water pipeline 006, and the soft water flows to the reverse osmosis filter 502, meeting different water use requirements of users and improving the user experience. Among them, the raw water is treated by the water purifier 001 and supplied to users as domestic water, so as to meet the domestic water use requirements of users such as washing vegetables and watering flowers, and there is no need to configure external pipelines in the water purifier 001, reducing material and installation costs. The soft water valve 020 of the present application is provided with two soft water output channels, which can supply different soft water using components. For example, the first soft water outlet channel 0212A supplies the water purification system 003 to reduce scale blockage, and the second soft water outlet channel 0214A is supplied to users as drinking water.

[0098] It should be noted that the soft water valve 020 includes a valve housing and a plurality of control components disposed within the valve housing. A plurality of water conveyance channels are formed within the valve housing, and the plurality of water conveyance channels are respectively used to communicate with an external raw water pipeline, a sewage pipeline, and a resin tank 010 and a salt tank 030 of the soft water system 002, etc. The control components are used to control the on-off of the plurality of water conveyance channels to switch the flow path within the soft water valve 020, thereby realizing various functions such as soft water production, salt dissolution, salt absorption, and backwashing.

[0099] In some embodiments, the soft water valve 020 includes a main valve body 021. The main valve body 021 includes a raw water inlet connection pipe 0211 and a raw water outlet connection pipe 0213. The raw water inlet connection pipe 0211 has a raw water inlet channel 0211A, and the raw water outlet connection pipe 0213 has a raw water outlet channel 0213A. The raw water outlet connection pipe 0213 is disposed on the raw water inlet connection pipe 0211 so that the raw water outlet channel 0213A communicates with the raw water inlet channel 0211A. The raw water entering the soft water valve 020 from the external raw water pipeline sequentially passes through the raw water inlet channel 0211A and the raw water outlet channel 0213A and then is directly output from the soft water valve 020, shortening as much as possible the path of the soft water valve 020 supplying raw water and avoiding turbulence and pressure drop caused by multi-stage shunting to ensure the rapid supply of raw water.

[0100] To meet various water usage scenarios, in the embodiments of the present application, the main valve body 021 includes a first soft water outlet connection pipe 0212 and a second soft water outlet connection pipe 0214. The first soft water outlet connection pipe 0212 has a first soft water outlet channel 0212A, and the second soft water outlet connection pipe 0214 has a second soft water outlet channel 0214A. The main valve body 021 is provided with two soft water outlet connection pipes, eliminating the need for additional installation of a tee joint or other shunting devices to cover multi-scenario requirements. Among them, the second soft water outlet connection pipe 0214 is disposed on the first soft water outlet connection pipe 0212 so that the first soft water outlet channel 0212A communicates with the second soft water outlet channel 0214A, and the two soft water conveyance channels are internally connected to ensure balanced water flow pressure.

[0101] Please refer to Figures 9-10, in some embodiments, the main valve body 021 includes a first valve housing 0215, a raw water inlet pipe 0211, and a first softened water outlet pipe 0212. The raw water inlet pipe 0211 has a raw water inlet channel 0211A, and the first softened water outlet pipe 0212 has a first softened water outlet channel 0212A. The first valve housing 0215 has a main chamber 0215A. The raw water inlet pipe 0211 and the first softened water outlet pipe 0212 are arranged outside the first valve housing 0215 and are respectively connected to the first valve housing 0215 for easy installation with other components. The soft water valve 020 further includes a valve core assembly 023. The valve core assembly 023 is arranged in the main chamber 0215A. The raw water inlet channel 0211A communicates with the main chamber 0215A. The valve core assembly 023 is used to adjust the on-off between the main chamber 0215A and the resin tank 010 or the salt tank 030 of the water purifier 001 to control the supply of raw water from the raw water inlet channel 0211A to the resin tank 010 or the salt tank 030, so as to meet the water supply for making softened water or resin regeneration.

[0102] In some embodiments, the raw water inlet pipe 0211 and the first softened water outlet pipe 0212 are arranged side by side. The raw water inlet channel 0211A and the main chamber 0215A are communicated through a first liquid passing channel 0215B arranged in the first valve housing 0215. The first liquid passing channel 0215B extends from the raw water inlet pipe 0211 towards the main chamber 0215A. Among them, the first liquid passing channel 0215B is designed in a straight line. During the process that the raw water flows through the raw water inlet channel 0211A and the first liquid passing channel 0215B, it does not need to pass through multiple bent channels and can quickly flow to the main chamber 0215A, improving the water flow efficiency.

[0103] Please refer to Figure 11 , in some embodiments, the soft water valve 020 further includes a sub-valve body 022. The sub-valve body 022 is used to connect with the resin tank 010 and the salt tank 030. The sub-valve body 022 includes a second valve housing 0221, a first tank connecting pipe 0222, and a second tank connecting pipe 0223 arranged in the second valve housing 0221. The second valve housing 0221 is connected to the first valve housing 0215. The first tank connecting pipe 0222 has a first tank channel 0222A, and the second tank connecting pipe 0223 has a second tank channel 0223A. The first tank channel 0222A and the second tank channel 0223A are respectively used to communicate with the resin chamber of the resin tank 010 to convey raw water or brine to the resin tank 010.

[0104] Specifically, the first tank passage 0222A communicates with the top of the resin chamber, and the second tank passage 0223A communicates with the bottom of the resin chamber. When the soft water valve 020 operates, the water liquid enters the resin tank 010 from the first tank passage 0222A or the second tank passage 0223A. For example, during the process of making soft water in the soft water system 002, the raw water enters the top of the resin tank 010 through the first tank passage 0222A, flows through the resin chamber, and then enters the soft water valve 020 through the second tank passage 0223A that communicates with the bottom of the resin chamber; during the process of resin regeneration in the soft water system 002, the raw water or brine enters the bottom of the resin tank 010 from the second tank passage 0223A and enters the soft water valve 020 from the first tank passage 0222A that communicates with the top of the resin chamber.

[0105] Please refer to Figure 12 , in some embodiments, the first valve housing 0215 is further provided with a second liquid passage 0215C and a third liquid passage 0215D. The second liquid passage 0215C communicates with the main chamber 0215A and the first tank passage 0222A respectively. The valve core assembly 023 can control the on-off between the second liquid passage 0215C and the main chamber 0215A. The third liquid passage 0215D communicates with the first soft water passage 0212A and the second tank passage 0223A respectively. In this way, the soft water formed in the resin tank 010 flows out of the soft water valve 020 through the second tank passage 0223A, the third liquid passage 0215D, and the first soft water passage 0212A, or the soft water formed in the resin tank 010 flows out of the soft water valve 020 through the second tank passage 0223A, the third liquid passage 0215D, the first soft water passage 0212A, and the second soft water passage 0214A.

[0106] Furthermore, the valve core assembly 023 has a first valve core position. In the first valve core position, the raw water inlet passage 0211A, the main chamber 0215A, the second liquid passage 0215C, and the first tank passage 0222A are sequentially communicated to guide the raw water to enter the resin tank 010 from the first tank connection 0222, and the soft water formed in the resin tank 010 sequentially passes through the second tank passage 0223A and the third liquid passage 0215D and flows out from the first soft water passage 0212A and / or the second soft water passage 0214A. That is, the first valve core position of the valve core assembly 023 defines the soft water making water path of the soft water valve 020.

[0107] In some embodiments, the valve core assembly 023 includes a valve core 0231 and a driving part 0232. The driving part 0232 is installed on the first valve housing 0215, and the driving part 0232 is connected to the valve core 0231 to drive the valve core 0231 to switch among multiple valve core positions, thereby adjusting the on-off between the soft water valve 020 and the resin tank 010 or the salt tank 030 of the water purifier 001.

[0108] In some of these embodiments, the auxiliary valve body 022 further includes a salt tank connecting pipe 0224 connected to the second valve housing 0221. The salt tank connecting pipe 0224 is provided with a salt passing channel 0224A for communicating with the salt tank 030. A fourth liquid passing channel 0221A is provided in the second valve housing 0221, and the fourth liquid passing channel 0221A communicates with the main chamber 0215A and the salt passing channel 0224A respectively. The valve core assembly 023 has a second valve core position. In the second valve core position, the raw water inlet channel 0211A, the main chamber 0215A, the fourth liquid passing channel 0221A, and the salt passing channel 0224A are connected in sequence to guide the raw water to enter the salt tank 030 from the salt tank connecting pipe 0224. That is, the second valve core position of the valve core assembly 023 defines the water injection water path of the water softening valve 020. When the water softening valve 020 actually works, the valve core assembly 023 switches to the second valve core position to realize the salt tank water injection action for resin regeneration, facilitating the formation of brine for subsequent regeneration processes.

[0109] In some of these embodiments, along the extension direction of the raw water inlet pipe 0211, the raw water inlet pipe 0211 and the first softened water outlet pipe 0212 are arranged on one side of the first valve housing 0215 and are arranged side by side to reduce the risk of interference of the pipelines installed on the water softening valve 020 caused by the staggered arrangement of the pipes. The auxiliary valve body 022 is arranged on the other side of the first valve housing 0215 to disperse the pipes on both sides of the water softening valve 020 along the extension direction of the raw water inlet pipe 0211, facilitating the connection of the resin tank 010 and the salt tank 030.

[0110] In some of these embodiments, the extension directions of the raw water inlet pipe 0211 and the first softened water outlet pipe 0212 are the same. The extension direction of the part of the valve housing having the raw water outlet channel 0213A is perpendicular to the extension direction of the raw water inlet pipe 0211. That is, the raw water outlet pipe 0213 is arranged perpendicular to the raw water inlet pipe 0211, and the water paths inside the two are orthogonal, reducing the pipe intersection and lowering the installation complexity. The extension direction of the part of the valve housing having the second softened water channel 0214A is perpendicular to the extension direction of the first softened water outlet pipe 0212. That is, the second softened water outlet pipe 0214 is arranged perpendicular to the first softened water outlet pipe 0212, and the water paths inside the two are orthogonal, reducing the pipe intersection and lowering the installation complexity.

[0111] In some of these embodiments, the second valve housing 0221 is further provided with a fifth liquid passage 0221B for communicating between the fourth liquid passage 0221A and the second tank passage 0223A. The fifth liquid passage 0221B communicates with the salt passage 0224A. Among them, the auxiliary valve body 022 further includes a jet assembly 024. The jet assembly 024 is disposed in the fifth liquid passage 0221B of the second valve housing 0221. The jet assembly 024 is used to control the water flow direction in the salt passage 0224A. The spool assembly 023 of the embodiment of the present application further has a third spool position. In the third spool position, the jet assembly 024 is activated to form a negative pressure, so that the brine in the salt tank 030 flows back into the salt passage 0224A. And in the third spool position, the raw water inlet passage 0211A, the main chamber 0215A, the fourth liquid passage 0221A, the fifth liquid passage 0221B, and the second tank passage 0223A are sequentially communicated, so that the brine formed in the salt tank 030 and the raw water entering the water softening valve 020 converge and then enter the bottom of the resin tank 010 from the second tank connection pipe 0223 to regenerate the resin in the resin tank 010.

[0112] The second valve housing 0221 is further provided with a sixth liquid passage 0221C for communicating between the main chamber 0215A and the second tank passage 0223A. The spool assembly 023 of the embodiment of the present application further has a fourth spool position. In the fourth spool position, the raw water inlet passage 0211A, the main chamber 0215A, the sixth liquid passage 0221C, and the second tank passage 0223A are sequentially communicated, so that the raw water entering the water softening valve 020 enters the bottom of the resin tank 010 from the second tank connection pipe 0223 to backwash the resin tank 010.

[0113] In some of these embodiments, the second valve housing 0221 is provided with a drain connection pipe 0225. The drain connection pipe 0225 communicates with the first tank passage 0222A. When the resin in the water softening system 002 is regenerated, the drain connection pipe 0225 is used to discharge the regenerated sewage from the first tank passage 0222A.

[0114] The embodiment of the present application provides a water softening system 002. The water softening system 002 includes a resin tank 010, a salt tank 030, and a water softening valve 020. The salt tank 030 is arranged side by side with the resin tank 010 along the first direction X. The water softening valve 020 is installed on the resin tank 010, and the water softening valve 020 communicates with the resin tank 010 and the salt tank 030 respectively. In the water softening system 002, the water softening valve 020 can control the raw water to enter the resin tank 010 to produce softened water. The water softening valve 020 can control the raw water to enter the salt tank 030 to form brine, and control the brine to be mixed with the raw water and enter the resin tank 010 to realize resin regeneration.

[0115] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be construed as a limitation of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0116] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water purifier, characterized in that: include: A soft water system is connected to the raw water inlet and has a first soft water outlet channel; A water purification system, connected to the first soft water outlet channel; as well as a mineral water pipeline, directly or indirectly connected to the raw water inlet; and The hot water system has a water inlet connected to the pure water outlet of the water purification system, and is used to provide users with hot water softened by the soft water system and purified by the water purification system.

2. The water purifier according to claim 1, characterized in that: The mineral water pipeline comprises: a second mineral water pipe, directly or indirectly connected to the raw water inlet; a primary filter element, disposed in the second mineral water pipe; and The second on-off valve is arranged on the second mineral water pipe to control the on-off of the second mineral water pipe.

3. The water purifier according to claim 2, characterized in that: The second mineral water pipeline also includes: A flow limiting plug is arranged on the second mineral water pipe.

4. The water purifier according to claim 2, characterized in that: The water purification system comprises: Pre-filter element, the primary filter element is the pre-filter element, or the primary filter element and the pre-filter element are different filter elements.

5. The water purifier according to claim 4, characterized in that: The water purification system also includes: The reverse osmosis filter element has a water inlet connected to the water outlet of the pre-filter element and is used to convert the soft water flowing through the pre-filter element into pure water.

6. The water purifier according to claim 5, characterized in that: The water purification system also includes: The water inlet of the post-filter is connected to the reverse osmosis filter element, so as to filter the soft water filtered by the reverse osmosis filter element again.

7. The water purifier according to claim 4, characterized in that: The water purification system comprises: A three-way control valve, wherein the first water inlet end is connected to the first soft water outlet channel, the second water inlet end is connected to the raw water inlet, and the water outlet end is connected to the primary filter element.

8. The water purifier according to claim 4, characterized in that: The soft water system comprises: A soft water valve, comprising a raw water inlet channel, a raw water outlet channel and the first soft water outlet channel, wherein the raw water inlet channel is connected to the raw water inlet; A resin tank connected to the raw water inlet channel and the first soft water outlet channel, and used to convert hard water into pure water; Among them, the raw water outlet channel is connected with the raw water inlet channel to guide part of the raw water entering the raw water inlet channel to directly flow out of the raw water outlet channel, and the second mineral water pipe is connected to the raw water inlet by connecting to the raw water outlet channel.

9. The water purifier according to claim 8, characterized in that: The soft water valve comprises a main valve body, the main valve body comprises a raw water inlet pipe, and the raw water inlet pipe has the raw water inlet channel; The main valve body comprises a raw water outlet pipe, the raw water outlet pipe has the raw water outlet channel, and the raw water outlet pipe is arranged on the raw water inlet pipe so that the raw water outlet channel is connected with the raw water inlet channel.

10. The water purifier according to claim 8, characterized in that: The soft water valve also includes: The second soft water outlet channel is connected to the resin tank and is used to discharge soft water.

11. The drinking water purifier according to claim 10, characterized in that: The second soft water outlet channel is communicated with the first soft water outlet channel to guide part of the soft water entering the first soft water outlet channel to directly flow out of the first soft water outlet channel.

12. The water purifier according to claim 11, characterized in that: The soft water valve comprises a main valve body, the main valve body comprises a first soft water outlet pipe, and the first soft water outlet pipe has the first soft water outlet channel; The main valve body includes a second soft water outlet pipe having the second soft water outlet passage, and the second soft water outlet pipe is arranged on the first soft water outlet pipe so that the first soft water outlet passage is connected with the second soft water outlet passage.

13. The water purifier according to claim 11, characterized in that: The soft water valve comprises a main valve body, the main valve body comprises a first valve shell, a raw water inlet pipe and a first soft water outlet pipe, the raw water inlet pipe has the raw water inlet channel, and the first soft water outlet pipe has the first soft water outlet channel; The first valve housing has a main chamber, the raw water inlet pipe and the first soft water outlet pipe are respectively connected to the first valve housing, and the raw water inlet channel is in communication with the main chamber; The soft water valve also includes a valve core, which is arranged in the main chamber and is used to adjust the connection between the main chamber and the resin tank or the salt box of the water purifier.

14. The water purifier according to claim 2, characterized in that: The primary filter element includes any one of a PP cotton filter element, an activated carbon filter element, an ultrafiltration filter element, a composite filter element, and a quartz sand filter element, and the reverse osmosis filter element includes an RO filter element.

15. The water purifier according to claim 2, characterized in that: The water purification system also includes: The booster pump is located upstream of the reverse osmosis filter element and is used to boost the pressure of the soft water flowing through the reverse osmosis filter element.

16. The water purifier according to claim 2, characterized in that: The water purification system also includes: A pure water quality detection element, disposed downstream of the reverse osmosis filter element, for detecting the total dissolved solids value of the pure water; and The pure water return pipeline connects the downstream of the reverse osmosis filter element and the upstream of the booster pump, and can return the filtered pure water to the upstream of the booster pump for secondary filtration.

17. The drinking water purifier according to claim 16, characterized in that: The pure water return pipeline comprises: a pure water reflux pipe, connecting the downstream of the reverse osmosis filter element with the upstream of the booster pump, and used for returning the filtered pure water to the upstream of the booster pump for secondary filtration; and The pure water reflux control component is installed on the pure water reflux pipe and is used to control the on / off and flow rate of the reflux water.

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