30results about How to "Lower the TDS value" patented technology

The invention relates to a domestic water purifier and discloses a reverse osmosis water purifier. The reverse osmosis water purifier comprises a reverse osmosis film filter element (1), the reverse osmosis film filter element (1) is connected with a raw water inlet pipe (11), a concentrated water outlet pipe (12) and a purified water outlet pipe (13), a pressure tank (2) is connected to the purified water outlet pipe (13) through a water storage pipe (21), and the pressure tank (2) is connected with a raw water inlet of the reverse osmosis film filter element (1) through a return pipe (23). Due to the facts that the pressure tan (2) for storing purified water is arranged in the reverse osmosis water purifier and concentrated water on the surface of a film is flushed through the purified water in the pressure tank (2), no osmotic pressure exists in a reverse osmosis film shell, the salt removing rate is high, and the TDS value of the purified water in the reverse osmosis film is effectively lowered.

The invention relates to the field of water purification, and discloses a water purifier with the function of reducing the TDS value of pure water, which comprises a raw water inlet pipe (1) and a reverse osmosis membrane filter element water inlet pipe (4) connected to the raw water inlet pipe (1) , the reverse osmosis membrane filter element water inlet pipe (4) is provided with a reverse osmosis membrane filter element (5), the pure water outlet of the reverse osmosis membrane filter element (5) is connected with a pure water outlet pipe (2), and the pure water outlet pipe (2) The first return pipe (7) connected with the reverse osmosis membrane filter element water inlet pipe (4) is connected on the top, and the first return flow solenoid valve (71) is provided on the first return flow pipe (7) and the flow direction is to flow into the reverse osmosis membrane filter element. The first one-way valve (72) of water pipe (4). In the present invention, by setting the first return pipe, the water before and after being treated by the reverse osmosis membrane filter element naturally convects, so that the TDS reaches a balance, and effectively reduces the TDS value on the pure water pipeline.

The invention relates to the field of water purification and discloses a water purifier and a water storage device with an intelligent washing function. The water storage device comprises a water storage tank (1), and further comprises a control module (8). The water storage tank (1) comprises an inner barrel (11) and an outer barrel (12), and further comprises a concentrated water inlet pipe (2), a purified water inlet pipe (3) and a backwash pipe (4), wherein the concentrated water inlet pipe (2) is communicated with the outer barrel (12), the purified water inlet pipe (3) and the backwash pipe (4) are communicated with the inner barrel (11), a washing solenoid valve (41) electrically connected with the control module (8) is arranged on the backwash pipe (4), one end of the backwash pipe (4) is connected with the inner barrel (11), and the other end of the backwash pipe (4) is connected to the purified water inlet pipe (3). According to the water purifier and the water storage device, purified water is adopted to wash an RO membrane, the TDS value of a first cup of purified water drunk by a user is greatly lowered, the problem that the first cup of purified water is high is effectively solved, it is ensured that the water quality of outlet water does not become poor, and the water tastes fresh.

The invention relates to the technical field of water purifiers, and in particular relates to a micro-wastewater purifier. The micro-wastewater purifier comprises a prefilter, a water inlet electromagnetic valve, a water pump, a filter element mechanism and an RO film which are connected through a pipeline, and further comprises a finite flow and circulating electromagnetic valve, a flow-limiting valve, a one-way valve, a high-pressure switch, a water storage bucket and a post-filter, wherein the prefilter is connected with a raw water pipeline; a purified water outlet of the RO film is connected with a purified water outlet pipe; the one-way valve and the high-pressure switch are sequentially arranged on the purified water outlet pipe along the water flow direction; the water outlet end of the purified water outlet pipe is respectively connected with the water storage bucket and the post-filter; a concentrated water outlet of the RO film is connected with a concentrated water outlet pipe; the water outlet end of the concentrated water outlet pipe is respectively connected with a water return pipe and a drain pipe; the finite flow and circulating electromagnetic valve is arranged on the water return pipe; the water outlet end of the water return pipe is connected with the water inlet end of the water pump; and a flow-limiting valve is arranged on the drain pipe. According to the micro-wastewater purifier, water resources can be saved; the amount of discharged wastewater is small; and the service life of the RO film and the water quality of the purified water are ensured.

The invention relates to a device capable of reducing TDS value of pure water of a free-installation clear water dispenser. The device comprises a raw water cup (1), a booster pump (2), a pre-filter element (4), an RO membrane component (5) and a purified water tank (11) connected through a water delivery pipe (A), wherein a high liquid level probe (10) and a low liquid level probe (12) are arranged in the purified water tank; a first TDS probe (3), a second TDS probe (6) and a reversing valve (7) are mounted on the water delivery pipeline; a third TDS probe (13) is mounted at a water outlet of the purified water tank; the first TDS probe, the second TDS probe, the third TDS probe, the booster pump and the reversing valve are connected with an electric control device (16) respectively; and a shutdown timing device (16a) is arranged on the electric control device. In the invention, the data acquired by the three TDS probes are conveyed to the electric control device, and the electric control device controls the on / off state and time of the reversing valve so as to reduce the TDS value of the purified water stored in the purified water tank.

The invention provides a high-efficient water purifier, which comprises a shell, and a drive pump, a first three-way valve, a control unit and a plurality of reverse osmosis membrane filters arranged in the shell. The reverse osmosis membrane filters are arranged in parallel; a water body to be purified is introduced by the drive pump, purified and treated through the reverse osmosis membrane filters, and then flows an inlet of the first three-way valve; the control unit is electrically connected with the drive pump and the first three-way valve. According to the high-efficient water purifier provided by the invention, the reverse osmosis membrane filters in parallel are adopted to filter and purify the water body, so that the water purifier is ensured to have enough water yield, meanwhile, the overall dimension of the water purifier is compressed into a cabinet, and the daily drinking water flow requirement and the installation dimension requirement of families are completely met. Meanwhile, when the first three-way valve takes water, stale drinking water remained in a pipeline is firstly discharged, so that a TDS (Total Dissolved Solids) value in the drinking water is reduced, and the water quality and the safety standard of the drinking water are improved. On the basis, the invention also provides the cabinet.

The invention provides a method for original soil greening of coastal saline-alkali soil by adopting nutrient soil containing calcium amino acid chelate. The method comprises a step of farmland consolidation, wherein the step of farmland consolidation comprises the step of laying of nutrient soil which comprises the following components: yellow mud, lotus pond sludge, a nitrogen-phosphorus-potassium compound fertilizer, geotechnical mineral micropowder, a dahurian rose fruit extract, acetic acid, cowpea skin powder, flammulina velutipes dregs, corn meal, minced water chestnut flesh, calcium amino acid chelate, fish scale powder, a water-retaining agent and trace elements. The invention also provides a preparation method for the nutrient soil. The original soil greening method provided by the invention has the following advantages: the cost of transporting foreign soil is saved; the cost is reduced; the cost of labor is saved by 26%; the effects of reducing soil TDS and decreasing soil alkalization degree are obtained; and the planted fig has prolonged fruit shelf life and soluble solids content of fruits is 16.8 to 18.6%.

The invention discloses a water purification system control method and a water purification system. A flushing filter element is connected in parallel on a pipeline between a water outlet of a boosterpump and a water inlet of a main filter element, and a first electromagnetic valve is mounted on the pipeline between the water outlet of the booster pump and the water inlet of the main filter element; after water production is stopped, the first electromagnetic valve is closed, a flushing filter element wastewater electromagnetic valve is started, the booster pump operates, water ends the flushing filter element, and then enters a main filter element to flush in front of a membrane of the main filter element after being filtered by the flushing filter element, thereby reducing a TDS value of the wastewater on the front side of the membrane of the main filter element; and meanwhile, the TDS value of a wastewater opening of the main filter element is acquired through a first detection device mounted at the wastewater opening of the main filter element, flushing is stopped when the TDS value of the wastewater opening is smaller than a first preset value, the inner side and the outer side of the membrane of the main filter element are soaked in pure water with the low TDS value, the technical problem that the TDS of a first cup of water is particularly high is solved, and crystallization of waterway system key components is avoided.

The invention discloses a multifunctional intelligent table type water purifier which comprises a raw water tank, a purified water tank and a water outlet part, and further comprises a water purification system arranged between the raw water tank and the purified water tank, and a heating system arranged between the purified water tank and the water outlet part; and the water outlet part comprises a first water outlet part and a second water outlet part, and a tea making cup is detachably mounted on the second water outlet part. The water purifier can ensure that the temperature of hot water flowing out of the water outlet part can reach a set temperature and the water outlet temperature is not too low, and can still provide purified water with relatively low TDS and improve the quality of the purified water after the water purifier is shut down for a long time. Cold and hot water can be directly obtained by designing the water outlet part, tea water can be directly obtained, the tea making function is achieved, the use function of the water purifier is increased, and the user experience feeling of the water purifier is better.

The invention relates to the technical field of water purification systems, and provides a water purification system for lowering a TDS value obtained after reverse osmosis membrane water-salt balanceand a water purifier. The system comprises a water inlet, a water outlet and a drainage outlet; the system further comprises a front treatment device, a water pump, a reverse osmosis filter, a back treatment device and a water storage device; the front treatment device is arranged between the water inlet and the water inlet end of the water pump, the water outlet of the water pump is communicatedwith the water inlet end of the reverse osmosis filter, the drainage end of the reverse osmosis filter is communicated with the drainage outlet, the back treatment device is arranged between the water outlet end of the reverse osmosis membrane filter and the water outlet, and the water storage device is arranged between the water outlet end of the reverse osmosis membrane filter and the water pump. Compared with the prior art, the TDS value inside the reverse osmosis filter can be effectively lowered, full-automatic flushing can be achieved, and the water quality of pure water is ensured.

The invention discloses a filtering device and a filtering system. The filtering device comprises a shell, a filter element, a raw water passing path, a pure water passing path and a concentrated water passing path, wherein the raw water passing path comprises a raw water inlet formed in the shell; the pure water passing path comprises a central pipe arranged in the filter element and a pure wateroutlet formed in the shell; the concentrated water passing path comprises a concentrated water outlet formed in the shell; the bottom end of the filter element is communicated with the raw water passing path to allow raw water to enter; and the top end of the filter element is communicated with the concentrated water passing path to allow concentrated water to be discharged. In addition, the filtering device further comprises a water storage part, wherein the water storage part is communicated with the raw water passing path, and is used for storing raw water when the filtering device is in operation and pushing the stored raw water to enter the filter element from the bottom end of the filter element by utilizing air pressure when the filtering device is shut down so as to wash the filter element. According to the filtering device and the filtering system adopting such a structure, backflushing of the filter element is realized through water stored in the water storage part, so the TDS value of the first cup of water can be effectively reduced and the service life of the filter element is prolonged.

The invention relates to the technical field of water purification machines, in particular to a micro waste water purification machine. The micro waste water purification machine comprises a pre-filter, a water inlet magnetic valve, a booster pump, a filter element mechanism and an RO (Reverse Osmosis) membrane that are sequentially connected by pipelines, and further comprises a circulating pump, a flow-limiting valve, a one-way valve, a high-voltage switch, a water storage bucket and a post-filter, wherein the pre-filter is connected with a raw water pipeline; a water purification outlet of the RO membrane is connected with a water purification water outlet pipe; the water purification water outlet pipe is provided with the one-way valve and the high-voltage switch sequentially in the water flow direction; a water outlet end of the water purification water outlet pipe is connected with the water storage bucket and the post-filter; a thick water outlet of the RO membrane is connected with a thick water outlet pipe; a water outlet end of the thick water outlet pipe is connected with a water return pipe and a water drain pipe; the water return pipe is provided with the circulating pump; a water outlet end of the water return pipe is connected with a water outlet end of the booster pump; the water drain pipe is provided with the flow-limiting valve; and the water outlet of the water drain pipe is connected with a water discharge pipe. The micro waste water purification machine can save water resources; the amount of exhausted waste water is less; and the service life of the RO membrane can be prolonged and the quality of pure water is guaranteed.

The invention provides a water purification machine and a water purification method thereof. The water purification machine comprises a first filter unit (10), a reverse osmosis membrane device (50),a pressurization system (40), a combined washing electromagnetic valve (71) and a second filter unit (20); the second filter unit (20) is arranged on a drainage pipe (70); the water inlet end of the second filter unit (20) is communicated with a concentrated water outlet of the reverse osmosis membrane device (50); and the water outlet end of the second filter unit (20) is communicated with the water inlet end of the combined washing electromagnetic valve (71) and a reflux pipe (80). The water purification machine provided by the invention solves the technical problem that when the existing water purification machine is high in recovery ratio, a TDS value in concentrated water is high, so that the service life of a reverse osmosis membrane is rapidly shortened, and the combined washing electromagnetic valve is liable in scaling.

The invention discloses a pure water membrane protection system of a large-flow water purifier. The invention relates to the field of high-flow pure water protective films of water purifiers. Aiming at the problems that an RO membrane in an existing large-flow water purifier is soaked in concentrated water with a high TDS value for a long time, the RO membrane is easy to block, the service life ofthe RO membrane is short, proposed now is the following scheme: the pure water membrane protection system comprises a water inlet, one end of the water inlet is connected with a front filtering assembly, one side of the front filtering assembly is connected with a water inlet valve, a low-pressure switch is arranged between the water inlet valve and the front filtering assembly, the other side ofthe water inlet valve is connected with a water pump, the water pump is connected with the RO membrane, the wastewater drainage pipe of the RO membrane is connected with a wastewater valve, and the other side of the wastewater valve is provided with a wastewater port. The pure water membrane protection system is novel in structure and good in membrane washing and protecting effect, the service life of the RO membrane is effectively prolonged, the replacement cost is reduced, and the problem that the water quality of first cup water is poor is solved.

The invention relates to the technical field of water purifiers, and in particular relates to a micro-wastewater purifier. The micro-wastewater purifier comprises a prefilter, a water inlet electromagnetic valve, a water pump, a filter element mechanism and an RO film which are connected through a pipeline, and further comprises a finite flow and circulating electromagnetic valve, a flow-limiting valve, a one-way valve, a high-pressure switch, a water storage bucket and a post-filter, wherein the prefilter is connected with a raw water pipeline; a purified water outlet of the RO film is connected with a purified water outlet pipe; the one-way valve and the high-pressure switch are sequentially arranged on the purified water outlet pipe along the water flow direction; the water outlet end of the purified water outlet pipe is respectively connected with the water storage bucket and the post-filter; a concentrated water outlet of the RO film is connected with a concentrated water outlet pipe; the water outlet end of the concentrated water outlet pipe is respectively connected with a water return pipe and a drain pipe; the finite flow and circulating electromagnetic valve is arranged on the water return pipe; the water outlet end of the water return pipe is connected with the water inlet end of the water pump; and a flow-limiting valve is arranged on the drain pipe. According to the micro-wastewater purifier, water resources can be saved; the amount of discharged wastewater is small; and the service life of the RO film and the water quality of the purified water are ensured.

The invention discloses a method for using a water-saving ultra-pure water machine. The pure water flushing pipe is connected to the water inlet pipe through the water inlet pipe tee, the concentrated water return pipe is connected to the concentrated water inlet pipe tee through the concentrated water inlet pipe tee, and the concentrated water inlet pipe tee is connected to the water inlet pipe. The water pipes are connected, so that both concentrated water and purified water can flow back and re-enter the primary filter element group, reducing the TDS value of raw water and restoring the TDS value of raw water, which can effectively save water; when pure water with higher purity is needed, use concentrated water first After a few minutes, turn on the pure water outlet switch, so that the pure water quality will be more pure and fresh. Pure water control four-way valve and concentrated water control four-way valve can ensure timely shutdown. Therefore, the present invention can make the pure water quality more pure and fresh, effectively prolong the service life of the RO membrane, effectively save water, and is convenient and flexible to use.

The invention provides a composite foam membrane water purification system, which comprises: a filtering core group, wherein the filtering core group comprises a fore-lying filtering core and a reverse osmosis filtering core, and the filtering core group is provided with a raw water inlet and a purified water outlet communicated with the fore-lying filtering core, and is also provided with a purified water inlet, a wastewater outlet and a purified water outlet communicated with the reverse osmosis filtering core; and a foam membrane filtering part, wherein the foam membrane filtering part comprises a filtering bottle, a first water inlet, a first water outlet and a stored water inlet and outlet are formed in the filtering bottle, a soft water tank body is arranged in the filtering bottle,a rear-lying filtering core is arranged in the soft water tank body, the water inlet end of the rear-lying filtering core is communicated with the first water inlet, the water outlet end of the rear-lying filtering core is communicated with the first water outlet, and a water storage space communicated with the stored water inlet and outlet is formed between the outer side of the water tank body and the inner side of the filtering bottle. According to the invention, by arranging and applying the water purification system, the TDS value of the first cup of water obtained by restarting after thewater purification system is standby can be reduced.

The invention relates to composite biochemical, coupled physicochemical, and heavy-metal-removing sewage treatment process and technology. The invention mainly discloses a continuous operation system composed of a mechanical solid-liquid separation unit, a composite biochemical treatment unit, a coupling physicochemical treatment unit, and a waste comprehensive utilization unit. According to the invention, a plant capillary biofilm bed technology, a shrub-type plant heavy metal removing technology, a flocculation complexation reaction technology, an inorganic membrane filtration technology, and optical, electrical, and membrane coupled desalination technology are adopted, such that harmful substances and heavy metal elements in sewage can be effectively removed. Treated water reaches a discharge standard, and can be recycled. Also, according to the invention, with microbial fermentation technology and high-temperature cracking technology, waste, sludge, and shrub-type plant fuel-wood are converted into nutritive soil, active carbon, tar and electrical power, such that waste is turned valuable, and pollutant discharge reduction or zero discharge is realized. The process and technology provided by the invention can be applied in organic sewage and industrial sewage treatment, and especially provides a good treatment effect against garbage leachate.

The invention discloses a water path system and water purification equipment. The water path system has a first water outlet state and a second water outlet state, and comprises a purified water path,a drainage water path, a connecting water path and a control module, wherein the control module is used for controlling the water path system to be switched between the first water outlet state and the second water outlet state. According to the invention, due to the fact that the water path system provided by the invention has the first water outlet state and the second water outlet state, whenthe water path system is in the first water outlet state, raw water flows into the reverse osmosis filtering device, so that the wastewater after washing the reverse osmosis filtering device is discharged through the drainage water path, and the reverse osmosis filtering device after standing for a long time can be washed clean; and when the water path system is in the second water outlet state, pure water with a low TDS value flows out of the reverse osmosis filtering device, so that the TDS value of the first cup of the water can be reduced.

The invention discloses a filter assembly and water purification equipment with the filter assembly, the filter assembly comprises a central pipe and a reverse osmosis film, a first partition plate divides the interior of the central pipe into a liquid outlet cavity and a treatment cavity, the treatment cavity is internally provided with a filter material for reducing the TDS value, and the central pipe is provided with a first on-off device and a second on-off device. The first on-off device is configured to be in an open state when the pressure acting on the side, away from the center of the central pipe, of the first on-off device is larger than the closing pressure of the first on-off device, so that the exterior of the central pipe communicates with the liquid outlet cavity; the second on-off device is configured to be in a closed state to cut off communication between the outside of the central pipe and the processing cavity when the pressure acting on the side, away from the center of the central pipe, of the second on-off device is larger than the opening pressure of the second on-off device, so that the outside of the central pipe is prevented from being communicated with the treatment cavity; According to the filtering assembly, the situation that the TDS value of the first cup of water is too high when the water purifier is started can be effectively avoided. In addition, automatic switching between a treatment water path and a pure water path can be achieved.

The invention provides a filter element structure capable of storing pure water and a foam film water purification system applying the filter element structure, wherein the filter element structure capable of storing pure water comprises a filter bottle, and a first water inlet, a first water outlet and a stored water inlet and outlet are formed in the filter bottle; a soft water tank body is arranged in the filter bottle, and a filter element assembly is arranged in the soft water tank body; the water inlet end of the filter element assembly is communicated with the first water inlet to forma first water inlet flow channel, the water outlet end of the filter element assembly is communicated with the first water outlet to form a first water outlet flow channel, and a water storage flow channel communicated with the water storage inlet and outlet is formed between the outer side of the water tank body and the inner side of the filter bottle. Due to the arrangement and application of the filter element structure, the TDS value of the first cup of water of the restarted water purification system after the water purification system is standby can be reduced.

The invention discloses two reverse osmosis water-making machines avoiding water waste. One reverse osmosis water-making machine adopts the structure that a water inlet one-way valve is arranged on a water inlet pipe; a water return pipe is connected onto the water inlet pipe in the front of the water inlet one-way valve; an air bag is arranged in a diaphragm shell; brackets are arranged between RO diaphragms and between grids. The other osmosis water-making machine adopts the structure that a water-inlet pressure water tank is arranged at the back of the water inlet one-way valve; the water return pipe is connected onto the water inlet pipe or a water main in the front of the water inlet one-way valve; a pure water cylinder-filling amount regulating valve is arranged on a pressure cylinder pure water pipe. The two reverse osmosis water-making machines are free of power, simple in structure, and low in failure rate and maintenance cost, and can serve as water purification machines avoiding water waste, reducing high-TDS water in the RO diaphragms in time, guaranteeing the quality of pure water, and prolonging the service life of the RO diaphragms.

The invention belongs to the technical field of water purification, and particularly discloses a water purification system, a water purification device and a control method of the water purification system. The water purification system comprises a membrane filtration unit and a desalination filtration unit which are connected in series along the water outlet direction, and the desalination filtration unit is configured as follows: when an electric field is not applied to the desalination filtration unit, the desalination filtration unit is in a water straight-through state only conducting water flow, and when the electric field is applied to the desalination filtration unit, the desalination filtration unit is in a water straight-through state only conducting water flow. And the desalting and filtering unit is in a desalting state or a regenerating state. The water purification device comprises the water purification system, and the control method is applied to the water purification system. According to the water purification system, the water purification device and the control method disclosed by the invention, the problem of'first cup of water 'can be solved, the drinking water safety is improved, and the waste of water resources is reduced.

The invention discloses a water path system and a purifier, the water path system is provided with a water source inlet and a pure water outlet, and the water path system comprises a filter element and a backflow assembly; the filter element comprises a reverse osmosis filter element, the reverse osmosis filter element is provided with a first water inlet and a first water outlet, the water source inlet is communicated with the first water inlet to form a water inlet flow path, and the first water outlet is communicated with the pure water outlet to form a water outlet flow path; the backflow assembly is provided with a backflow water inlet and a backflow water outlet, the backflow water inlet is communicated with the water outlet flow path, the backflow water outlet is communicated with the water inlet flow path, and the backflow assembly is used for enabling part of water flow of the water outlet flow path to flow back to the water inlet flow path. According to the technical scheme, the desalting rate of the waterway system can be improved.

The invention relates to a waterway structure for providing pure water for a raw water side of an RO membrane filter element. The waterway structure comprises a pure water bottle structure, an RO membrane filter element, a first one-way valve and a second one-way valve. The pure water bottle structure comprises a bottle body, a water flow channel and a water outlet flow channel. A water containingcavity is formed in the bottle body. A water port at one end of the water flow channel extends into the bottom of the water containing cavity and is communicated with the water containing cavity; a water inlet of the water outlet flow channel is communicated with the water containing cavity, and a water outlet of the water outlet flow channel is communicated with the outside; a pure water outletof the RO membrane filter element is communicated with a water inlet of the first one-way valve, a water outlet of the first one-way valve is communicated with a water inlet of the second one-way valve and a water opening in the other end of the water flow channel, and a water outlet of the second one-way valve is communicated with a water inlet of the RO membrane filter element. The waterway structure has the advantages that the structure is simple and compact, pure water is provided for the raw water side of the RO membrane filter element, the TDS value of the raw water side is reduced, andthe production cost is reduced.

The invention relates to a waterway structure for reducing a TDS value of a raw water side of an RO membrane filter element. The waterway structure comprises a rear filter assembly, an RO membrane filter element, a first one-way valve and a second one-way valve. A pure water outlet of the RO membrane filter element is communicated with a water inlet of the first one-way valve, a water outlet of the first one-way valve is communicated with a water inlet of a water inlet flow channel of the rear filter assembly, a water outlet of a water outlet flow channel of the rear filter assembly is communicated with a water inlet of the second one-way valve, and a water outlet of the second one-way valve is communicated with a water inlet of the RO membrane filter element. The waterway structure has the advantages that the structure is simple and compact, pure water flows back to the raw water side of the RO membrane filter element by adjusting the one-way valve, the TDS value of the raw water sideis reduced, and the production cost is reduced.

The invention discloses a water purifying device for a water dispenser. The invention relates to the technical field of water purification equipment, and discloses a water purifying device. The water purifying device comprises a reverse osmosis membrane filter element, a rear carbon filter element and a TDS reduction filter element, wherein the reverse osmosis membrane filter element is provided with a pure water outlet, a wastewater outlet and a raw water inlet communicated with raw water; the rear carbon filter element comprises a first water inlet communicated with the pure water outlet and a pure water outlet communicated with a faucet; the TDS reducing filter element is arranged between the reverse osmosis membrane filter element and the rear carbon filter element and comprises a second water inlet and a water outlet, the second water inlet is communicated with the pure water outlet, and the water outlet is communicated with the first water inlet. According to the invention, pure water filtered by the reverse osmosis membrane filter element is filtered by the TDS reducing filter element again, so that the TDS value of outlet water is ensured to be in a relatively low condition in the whole running period of the drinking water equipment, pipeline pollution is avoided, the quality of the pure water is ensured, the body health of a user is ensured; meanwhile, 'a first cup of water' does not need to be discharged, and the waste of water resources is avoided.

The invention discloses a reverse osmosis filter element and a water purifier. The reverse osmosis filter element comprises a shell assembly and a reverse osmosis membrane assembly; the shell assemblyis provided with a mounting cavity, and a raw water inlet, a concentrated water outlet and a pure water outlet which are respectively communicated with the mounting cavity; the reverse osmosis membrane assembly is mounted in the mounting cavity and is used for carrying out osmosis filtration treatment on the raw water to generate concentrated water and pure water, the reverse osmosis membrane assembly is provided with a filtering area and a pure water area, the filtering area is respectively communicated with the raw water inlet and the concentrated water outlet, and the pure water area is communicated with the pure water outlet; wherein a pressure maintaining water storage chamber is defined by the peripheral wall of the reverse osmosis membrane assembly and the inner wall of the shell assembly, a pure water channel of the pure water area is communicated with the pressure maintaining water storage chamber, and a pressure maintaining member is arranged in the pressure maintaining water storage chamber. According to the invention, the structure of the reverse osmosis filter element is improved, the backwashing function is realized, and the problem of high TDS value of the first cupof water is solved, so that a user can directly drink the first cup of water.

The present invention relates to the technical field of water purification equipment, in particular to a control method, a control device, water purification equipment and a storage medium of water purification equipment. The control method of the water purification equipment includes the following steps: judging whether the water purification equipment enters the standby state; when the water purification equipment enters the standby state, the pure water return branch is turned on, and the opening of the waste water valve is set to the first opening; wherein , the water purification equipment includes a reverse osmosis filter element, a waste water valve is arranged on the waste water branch road of the reverse osmosis filter element, a pure water return branch is arranged between the water outlet end and the water inlet end of the reverse osmosis filter element, and the first opening is smaller than the second The second opening is the opening of the waste water valve when the water purification equipment normally outputs pure water. The opening of the waste water valve in the technical solution of the present invention is smaller than that of the waste water valve when the pure water is normally discharged from the pure water backflow flushing state, which reduces the concentrated water discharge during backflow and saves water resources.

The invention discloses a waterway system and a water purifier, the waterway system is provided with a water source inlet and a pure water outlet, the waterway system comprises a front filter element, a desalination filter element, a rear filter element and a one-way reflux valve assembly, the front filter element is provided with a first water inlet and a first water outlet, and the first water inlet is communicated with the water source inlet. The desalting filter element is provided with a second water inlet and a second water outlet, the second water inlet is communicated with the first water outlet, and a water inlet flow path is formed between the water source inlet and the second water inlet. The rear filter element is provided with a third water inlet and a third water outlet, the third water inlet is communicated with the second water outlet, the third water outlet is communicated with the pure water outlet, and a water outlet flow path is formed between the pure water outlet and the second water outlet. The one-way backflow valve assembly is provided with a backflow water inlet and a backflow water outlet, the backflow water inlet is communicated with the water outlet flow path, and the backflow water outlet is communicated with the water inlet flow path. According to the technical scheme, the desalting rate of the waterway system is adjustable.