CN204588853U - A water purifier without waste water - Google Patents

Abstract

The utility model relates to the technical field of water purifiers, in particular to a wastewater-free water purifier, which comprises a pre-filter, a water inlet solenoid valve, a water pump, a filter element mechanism and a RO (reverse osmosis) membrane filter element which are sequentially connected through a pipeline, wherein the water purifier also comprises a current-limiting and circulating solenoid valve, a check valve, a high-voltage switch, a water storage barrel and a post-filter, the pre-filter is connected with a raw water pipeline, a purified water outlet of the RO membrane filter element is connected with a purified water outlet pipe, the outlet end of the purified water outlet pipe is connected with a purified water pipe, and the purified water pipe is sequentially provided with the check; the concentrated water outlet of the RO membrane filter element is connected with a concentrated water outlet pipe, the outlet end of the concentrated water outlet pipe is respectively connected with a concentrated water return pipe and a domestic water pipeline, the concentrated water return pipe is provided with a flow limiting and circulating electromagnetic valve, and the water outlet end of the concentrated water return pipe is connected with the water inlet end of the water pump. The water purifier realizes the function of no waste water discharge without discharging the concentrated water when preparing the pure water, and the concentrated water is reasonably used when using the domestic water.

Description

A water purifier without waste water

technical field

The utility model relates to the technical field of water purifiers, in particular to a waste water-free water purifier.

Background technique

RO reverse osmosis membrane direct drinking machine is also called RO reverse osmosis membrane water purifier. The full name of RO in English is: Reverse Osmosis, which is reverse osmosis. The reverse osmosis membrane filter cartridge is equipped with a reverse osmosis membrane filter element. Under a certain pressure, water molecules can pass through the RO membrane, while impurities such as inorganic salts, heavy metal ions, organic matter, colloids, bacteria, and viruses in the water cannot pass through the RO membrane. membrane, so that part of the water is separated through the RO membrane, and the unpermeable water forms concentrated water due to the increase of solute. Reverse osmosis membrane water purifiers were used in industrial fields such as seawater and brackish water desalination, boiler feed water, and wastewater treatment in the early days, and have been introduced into civilian fields in recent years.

Although reverse osmosis treatment technology has many advantages, it produces a part of concentrated water while producing purified water. Usually, the ratio of purified water to wastewater of RO membrane filter element is 1:3, that is to say, after one purification and filtration, The concentrated water produced is about 3 times that of purified water.

The previous reverse osmosis membrane water purifiers were concentrated water discharge type, that is, the concentrated water after primary purification and filtration was discharged directly as waste water, which is indeed a great waste, especially for small household and commercial water purifiers. , the raw water is tap water, and the water quality of the concentrated water produced after one purification and filtration is not worse than that of the raw water. Increase the cost of water purification, but also a waste of water resources.

Utility model content

The purpose of this utility model is to provide a non-wastewater water purifier for the above-mentioned deficiencies in the prior art. Prolong the service life of the RO membrane filter element, and reduce the TDS value of pure water. The quality of pure water is high, and it can also effectively increase the flow rate of domestic water.

The purpose of this utility model is achieved through the following technical solutions.

A waste water-free water purifier, comprising a pre-filter, a water inlet solenoid valve, a water pump, a filter element mechanism and an RO membrane filter element connected sequentially through pipelines, the water purifier also includes a flow-limiting and circulation solenoid valve, a one-way valve , high pressure switch, water storage tank and post filter,

The pre-filter is connected to the raw water pipeline, the water purification outlet of the RO membrane filter element is connected to a water purification outlet pipe, and the outlet end of the water purification outlet pipe is connected to a pure water pipe, and the pure water pipes are sequentially arranged along the water flow direction. The one-way valve and the post-filter, the water outlet end of the post-filter is connected with a pure water faucet, and the pure water pipe at the water inlet end of the post-filter is connected with the water storage bucket through a water storage pipeline; A high-pressure switch is arranged on the water storage pipeline;

The concentrated water outlet of the RO membrane filter element is connected with a concentrated water outlet pipe, and the outlet ends of the concentrated water outlet pipe are respectively connected with a concentrated water return pipe and a domestic water pipeline. The circulation solenoid valve and the one-way valve, the outlet end of the concentrated water return pipe is connected to the water inlet end of the water pump, and the outlet end of the domestic water pipeline is connected to a domestic water faucet;

The water purifier also includes an electric control device, the water inlet solenoid valve, the high pressure switch, the water pump and the current limiting and circulation solenoid valve are respectively electrically connected to the electric control device.

Wherein, the current-limiting and circulating solenoid valve includes a solenoid valve body and a valve seat cooperating with the solenoid valve body, a water retaining plate and a gasket are arranged between the solenoid valve body and the valve seat, and springs are arranged in the middle of the solenoid valve body in sequence. , the valve core and the silica gel grains, the silica gel grains are in contact with the water retaining plate, the gasket is embedded with the valve seat, there is a circulation chamber in the valve seat, and a partition is arranged between the circulation chamber and the inner wall of the valve seat, and the partition board The height of the valve seat is less than the height of the circulation chamber. The two sides of the valve seat are respectively provided with an inlet pipe and an outlet pipe. The inlet pipe communicates with the inside of the valve seat. The circulation chamber is provided with a circulation hole. A flow-limiting hole is provided, and the flow-limiting hole communicates with the inside of the valve seat.

Wherein, a bypass pipeline is provided between the raw water pipeline and the domestic water pipeline, and the bypass pipeline is provided with a water flow switch and a one-way valve. Specifically, the outlet end of the bypass line is connected to the domestic faucet, and the water flow switch is electrically connected to the electric control device.

Wherein, the outlet end of the concentrated water outlet pipe is also connected with a forced discharge protection pipeline, the forced discharge protection pipeline is provided with a first normally closed solenoid valve, the outlet of the first normally closed solenoid valve is connected to the sewer pipe, and the first normally closed solenoid valve The solenoid valve is electrically connected with the electric control device.

Wherein, the circulating water of the water purifier passes through the surface of the RO membrane filter element, and the flux per unit time is 2.0 L/min.

Wherein, the ratio of the flow rate of the bypass line to the flow rate of the raw water line passing through the water purifier is 1:1.

Wherein, the outlet end of the clean water outlet pipe is also connected with a clean water return pipe, and the clean water return pipe is provided with a normally open solenoid valve and a one-way valve in sequence along the water flow direction, and the outlet end of the clean water return pipe is connected to the inlet At the water outlet end of the water solenoid valve, the pure water pipe is also provided with a second normally closed solenoid valve, and the second normally closed solenoid valve is arranged at the water inlet end of the pure water pipe.

Wherein, the water purifier also includes a cleaning solution for cleaning the RO membrane filter element, and the cleaning solution is food-grade citric acid or white vinegar.

Wherein, the filter element mechanism includes a primary filter element, a secondary filter element and a tertiary filter element connected in series in sequence.

Wherein, the first-stage filter element is an origami filter element with a pore size of 20 μm, the second-stage filter element is an activated carbon filter element, the third-stage filter element is a PP cotton filter element, and the post-filter is a post-position activated carbon filter element.

Wherein, the filter element mechanism includes a secondary composite filter element and a tertiary composite filter element connected in parallel, and the water outlet ends of the secondary composite filter element and the tertiary composite filter element are respectively connected to the water inlet end of the RO membrane filter element. The pre-filter is an origami filter element with a pore size of 20 μm.

Wherein, the two-stage composite filter element and the three-stage composite filter element are composite filter elements of sintered activated carbon columns and PP cotton, the outer layer of the composite filter element is PP cotton with a pore size of 1-5 μm, and the PP cotton is filled with sintered activated carbon columns , The sintered activated carbon column is a hollow structure.

The beneficial effects of the utility model :

(1) The utility model realizes that concentrated water does not need to be discharged when producing pure water, and that concentrated water can be used rationally when using domestic water.

Concentrated water is not waste water. It is water filtered by PP cotton and activated carbon, and it is better than tap water. Concentrated water becomes circulating water and is purified many times. No waste water discharge function. Traditionally speaking, as the amount of pure water produced gradually increases, the concentration of circulating water also increases. High-concentration circulating water will affect the service life of RO membrane filter elements, and will also affect the quality of pure water (pure water TDS value elevated). The water purifier not only does not affect the service life of the RO membrane filter element, but effectively prolongs the service life of the RO membrane filter element, and does not affect the quality of pure water produced. The reasons are as follows:

A. Controlled by the electronic control device, when the water pump, current limiting and circulation solenoid valve are opened at the same time, the water purifier is in a circulating state, and the water pump is used as a circulating pump at this time, and the circulating water flow rate is 2 liters per minute. Measure the water flow to flush the RO membrane filter element. After 2 minutes of circulation, the electric control device controls the current limiting and circulating solenoid valve to close. The water purifier is in the state of water production. The water pump is used as a booster pump at this time. The flow limiting function of the valve is to control the working pressure of water production. The water pump of the utility model can replace a booster pump and a circulation pump, and has the dual-purpose function of one pump.

B. Because of the large flux circulation system, the water purifier itself has the function of cleaning the RO membrane filter with medicine. When the calcium, magnesium ions and colloids in the water block the RO membrane filter when the traditional model is used, the water production will be seriously insufficient. , only the RO membrane filter can be replaced. The water inlet machine can clean the RO membrane filter element with medicine, so as to prolong the service life of the RO membrane filter element. The water yield of the RO membrane filter element cleaned by the drug has reached the level of the new RO membrane filter element, and its service life has been extended by more than 3 times compared with the traditional model.

(2) The utility model can effectively increase the flow rate of domestic water.

In the existing non-wastewater discharge reverse osmosis water purifier, the domestic water completely passes through the water purifier. Due to the resistance of the filter element, the water volume of the domestic water is reduced. In order to increase the domestic water consumption, the water purifier of the utility model is A bypass pipeline is added between the raw water pipeline and the domestic water faucet to increase the domestic water consumption. The ratio of the flow of the bypass pipeline to the flow of the raw water pipeline passing through the water purifier is 1:1, thereby effectively increasing the domestic water consumption. flow.

(3) The utility model can effectively improve the service life of the pretreatment filter element before the RO membrane filter element. The reasons are as follows:

A. Since the flow through the water pipe of the water purifier is doubled, the life of the pretreatment filter before the RO membrane filter is doubled.

B. Change the structure and arrangement of the pretreatment filter PP cotton and activated carbon before the RO membrane filter. The original first-stage filter element is a 5-micron pore-diameter PP cotton filter element, and the third-stage filter element is a 1-micron pore-diameter PP cotton filter element. Due to the pore size of the secondary filter element The difference is not large. When actually filtering impurities in water, the service life of the first-stage filter element and the third-stage filter element is very different. The first-stage filter element of the utility model adopts an origami filter element with a pore size of 20 microns and is connected in series. Its function is to filter raw water. Larger particulate matter makes the whole filter system perform coarse filtration first and then fine filtration, and the surface area of the origami filter element is several times larger than that of the PP cotton filter element, thus prolonging the service life. The secondary filter element and the tertiary filter element are composite filter elements. The structure of the composite filter element is that the outer layer is a PP cotton filter material with a pore size of 1-5 microns, and its function is to filter smaller particles in the raw water. The inner layer is sintered activated carbon , its main function is to adsorb residual chlorine in raw water, and the adsorption capacity of sintered activated carbon is more than 2 times stronger than that of granular carbon. Connecting the secondary composite filter element and the tertiary composite filter element in parallel can exert their effects more effectively. By changing the connection mode and changing the structure of the filter element, the efficiency and service life of the pretreatment of the RO membrane filter element can be maximized.

(4) The non-waste water purifier of the present utility model adds a strong discharge protection function. When the consumption of domestic water is relatively small, that is, when the continuous production of pure water is 6 liters but the domestic water consumption does not reach 6 liters (use life When the water volume reaches 6 liters, the concentrated water in the water machine can be completely replaced with raw water) The forced discharge protection solenoid valve is opened through the electronic control device for forced discharge. After 6 liters are discharged, the forced discharge protection solenoid valve is automatically closed and the accumulated water is re-accumulated. Time is the amount of water produced, so as to solve the damage to the RO membrane filter element caused by abnormal use of the water purifier and protect the RO membrane filter element. The continuous production of 6 liters of pure water as the strong discharge protection node is only set in consideration of the relationship between the actual pure water consumption and the TDS value of pure water, that is, the quality of pure water.

(5) The non-waste water purifier of this utility model only needs to cooperate with the water pump and the current limiting and circulation solenoid valve, and only one water pump can be used to realize the two functions of pressurization and circulation, which greatly reduces the cost of materials and production, and the net The water machine has a simpler structure and is easier to assemble and maintain.

Description of drawings

Utilize accompanying drawing to further illustrate the utility model, but the embodiment in the accompanying drawing does not constitute any restriction to the present utility model, for those of ordinary skill in the art, under the premise of not paying creative work, also can obtain according to following accompanying drawing Additional drawings.

Fig. 1 is the functional block diagram of embodiment 1 of the present utility model;

Fig. 2 is the functional block diagram of embodiment 2 of the present utility model;

Fig. 3 is the water production curve figure of the initial 2 minutes water production of the 100 gallons model of the utility model;

Fig. 4 is the graph of the mixed water TDS value of Fig. 3;

Fig. 5 is the curve diagram of the water production volume after the initial 2 minutes water production of the 100 gallon model of the utility model;

Fig. 6 is the graph of the mixed water TDS value of Fig. 5;

Fig. 7 is a schematic cross-sectional structure diagram of the current limiting and circulating solenoid valve of the present invention;

Fig. 8 is a structural schematic diagram of the valve seat of the current limiting and circulating solenoid valve of the present invention.

Reference signs include:

10——Raw water pipeline 20——Pre-filter 30——Inlet solenoid valve

40——Water pump 51——Primary filter element 52——Secondary filter element

53——three-stage filter element 54——two-stage composite filter element 55——three-stage composite filter element

60——RO membrane filter element 71——clean water outlet pipe

711—Clear water return pipe 712—Pure water pipe 72—Concentrated water outlet pipe

721——concentrated water return pipe 722——domestic water pipeline 723——forced discharge protection pipeline

80——electric control device 90——normally open solenoid valve 100——one-way valve

110——The first normally closed solenoid valve 111——The second normally closed solenoid valve

120——post filter 130——water storage tank

140——Current limiting and circulation solenoid valve 160——Bypass pipeline 170——Water flow switch

180——Life water faucet 190——Pure water faucet 200——Water storage pipe

210——High pressure switch 301——Solenoid valve body 302——Valve seat

303——Water baffle 304——Sealing gasket 305——Spring

306——spool 307——silica gel 308——circulation chamber

309——Partition 310——Water inlet pipe 311——Water outlet pipe

312——circulation hole 313——restriction hole.

Detailed ways

The utility model is further described in conjunction with the following examples, see Fig. 1-8.

Example 1

As shown in Figure 1, a kind of non-wastewater water purifier of the present embodiment comprises the pre-filter 20, the water inlet solenoid valve 30, the water pump 40, the filter element mechanism and the RO membrane filter element 60 which are connected in sequence through the pipeline. The water machine also includes a limited flow and circulation solenoid valve 140, a one-way valve 100, a high pressure switch 210, a water storage tank 130 and a post filter 120,

The pre-filter 20 is connected to the raw water pipeline 10, and the water purification outlet of the RO membrane filter element 60 is connected to a water purification outlet pipe 71, and the outlet end of the water purification outlet pipe 71 is connected to a pure water pipe 712, and the pure water pipe 712 The one-way valve 100 and the post-filter 120 are arranged in sequence along the water flow direction, the water outlet end of the post-filter 120 is connected with a pure water faucet 190, and the pure water pipe 712 at the water inlet end of the post-filter 120 It is connected to the water storage barrel 130 through a water storage pipeline 200; the high-pressure switch 210 is arranged on the water storage pipeline 200;

The concentrated water outlet of the RO membrane filter element 60 is connected with a concentrated water outlet pipe 72, and the outlet end of the concentrated water outlet pipe 72 is respectively connected with a concentrated water return pipe 721, a domestic water pipeline 722 and a forced discharge protection pipeline 723, and the concentrated water return pipe 721 is provided with the current limiting and circulating solenoid valve 140 and the one-way valve 100 sequentially along the water flow direction. Connected with a domestic faucet 180, the forced discharge protection pipeline 723 is provided with a first normally closed solenoid valve 110, and the water outlet of the first normally closed solenoid valve 110 of the forced discharge protection pipeline 723 is connected to the sewer pipe;

A bypass pipeline 160 is provided between the raw water pipeline 10 and the domestic water pipeline 722, and the bypass pipeline 160 is provided with a water flow switch 170 and a one-way valve 100;

The water purifier also includes an electric control device 80, the water inlet solenoid valve 30, the water flow switch 170, the high pressure switch 210, the first normally closed solenoid valve 110, the water pump 40 and the The current limiting and circulating solenoid valves 140 are electrically connected to the electric control device 80 respectively.

Preferably, the outlet end of the clean water outlet pipe 71 is also connected with a clean water return pipe 711, and the clean water return pipe 711 is sequentially provided with a normally open solenoid valve 90 and a one-way valve 100 along the water flow direction, and the outlet end of the clean water return pipe 711 Connected to the water outlet end of the water inlet solenoid valve 30, the pure water pipe 712 is also provided with a second normally closed solenoid valve 111, the second normally closed solenoid valve 111 is arranged at the water inlet end of the pure water pipe 712, The second normally closed solenoid valve 111 and the normally open solenoid valve 90 are respectively electrically connected to the electric control device.

Specifically, the outlet end of the bypass line 160 is connected to the domestic faucet 180 .

Firstly, the utility model realizes that concentrated water does not need to be discharged when producing pure water, and that concentrated water can be used rationally when domestic water is used.

Concentrated water is not waste water. It is water filtered by PP cotton and activated carbon, and it is better than tap water. Concentrated water becomes circulating water and is purified many times. No waste water discharge function. Traditionally speaking, as the amount of pure water produced gradually increases, the concentration of circulating water also increases. High concentration circulating water will affect the service life of RO membrane filter element 60, and also affect the quality of pure water (pure water TDS value increases). The water purifier not only does not affect the service life of the RO membrane filter element 60 but effectively prolongs the service life of the RO membrane filter element 60 without affecting the quality of pure water produced. The reasons are as follows:

A. Controlled by the electronic control device, when the water pump, current limiting and circulation solenoid valve are opened at the same time, the water purifier is in a circulating state, and the water pump is used as a circulating pump at this time, and the circulating water flow rate is 2 liters per minute. Measure the water flow to flush the RO membrane. After 2 minutes of circulation, the electric control device controls the current limiting and circulating solenoid valves to close. The water purifier is in the water production state. The water pump is used as a booster pump at this time. The current limiting function can control the water working pressure. Preferably, the water of the water purification mechanism circulates for 1 minute every 5 minutes.

B. Because of the large-flux circulation system, the water purifier itself has the function of cleaning the RO membrane filter element 60 with drugs. When the traditional model is used, once the calcium, magnesium ions and colloids in the water block the RO membrane filter element 60, the water production will be reduced. Seriously insufficient, only the RO membrane filter element 60 can be replaced. And this water inlet machine can carry out medicine cleaning to RO membrane filter core 60, prolong the service life of RO membrane filter core 60 with this. The water yield of the RO membrane filter element 60 cleaned by the medicine has reached the level of the new RO membrane filter element 60, and its service life is extended by more than 3 times compared with the traditional model.

Among them, the utility model can effectively increase the flow rate of domestic water: in the existing reverse osmosis water purifier without waste water discharge, the domestic water completely passes through the water purifier, and due to the resistance of the filter element, the water volume of domestic water is reduced. In order to increase the domestic water consumption of the utility model water purifier, a bypass pipeline 160 is added between the raw water pipeline 10 and the domestic water faucet 180 to increase the domestic water consumption. The ratio of the flow rate is 1:1, thus effectively increasing the flow rate of domestic water.

The circulating water of the water purifier passes through the RO membrane filter element 60. The flux per unit time on the surface of the filter element 60 is 2.0L/min, that is, the circulation rate of the water pump is 2.0L/min. It has the function of cleaning the RO membrane filter element 60.

The water purifier also includes a cleaning solution for cleaning the RO membrane filter element 60. The cleaning solution is food-grade citric acid or white vinegar, which is convenient for obtaining materials and has low cleaning cost. The specific implementation is as follows: when the flow rate of the water produced by the water machine drops or is used as a maintenance drug for cleaning, first cut off the water and power, turn on the domestic water faucet 180 to remove the pressure in the water machine, and remove any pre-membrane pretreatment filter bottle, Pour out the circulating water with the same proportion as the cleaning solution, reinstall the filter bottle after filling the liquid medicine, and let the current limiting and circulating solenoid valve 140 be in an open state after power transmission. The cleaning liquid in the water pump 40 is used to circulate the medicine to flush the RO membrane filter element 60. The medicine cleaning time is determined according to the blocking degree of the RO membrane filter element 60. After the cleaning time is reached, the machine is stopped, and then the raw water ball valve is opened to drain all the filter bottles with tap water. The cleaning liquid is completely replaced from the domestic water faucet 180, thereby completing the work of cleaning the RO membrane filter element 60 with the medicine. The pre-membrane pretreatment filter bottle refers to the filter bottle of the filter element mechanism connected before the RO membrane filter element 60 .

The non-waste water purifier of the utility model has added a strong discharge protection function. When the consumption of domestic water is relatively small, that is, when the continuous production of pure water is 6 liters and the domestic water consumption does not reach 6 liters (the consumption of domestic water reaches 6 liters). The concentrated water in the water machine can be completely replaced with raw water when it reaches 6 liters) The forced discharge protection solenoid valve is opened through the electronic control device to perform forced discharge, and the forced discharge protection solenoid valve is automatically closed after 6 liters are discharged, and the water production time is accumulated again. The amount of water is used to solve the damage to the RO membrane filter element 60 caused by abnormal use of the water purifier, and to protect the RO membrane filter element 60. The continuous production of 6 liters of pure water as the strong discharge protection node is only set in consideration of the relationship between the actual pure water consumption and the TDS value of pure water, that is, the quality of pure water.

(5) The non-waste water purifier of this utility model only needs to cooperate with the water pump and the current limiting and circulation solenoid valve, and only one water pump can be used to realize the two functions of pressurization and circulation, which greatly reduces the cost of materials and production, and the net The water machine has a simpler structure and is easier to assemble and maintain.

As shown in Figure 7 and Figure 8, the flow limiting and circulation solenoid valve of this embodiment includes a solenoid valve body 301 and a valve seat 302 cooperating with the solenoid valve body 301, and a mutual The connected water retaining plate 303 and sealing gasket 304, the middle part of the solenoid valve body 301 is provided with a spring 305, a valve core 306 and silica gel particles 307 in sequence, the silica gel particles 307 are in contact with the water retaining plate 303, and the sealing gasket 304 is embedded in the valve seat 302 , the valve seat 302 is provided with a circulation chamber 308, a partition 309 is provided between the circulation chamber 308 and the inner wall of the valve seat 302, the height of the partition 309 is smaller than the height of the circulation chamber 308, and the two sides of the valve seat 302 are respectively The water inlet pipe 310 and the water outlet pipe 311 are provided, the water inlet pipe 310 communicates with the inside of the valve seat 302, the circulation chamber 308 is provided with a circulation hole 312, the water outlet pipe 311 communicates with the circulation hole 312, and the water outlet pipe 311 also has a limited flow hole 313, The restrictor hole 313 communicates with the inside of the valve seat 302 .

When the water purifier is in a circulating state, after water enters the valve seat 302 from the water inlet pipe 310, the silica gel particles 307 are bounced up, the water retaining plate 303 and the gasket 304 are lifted under the action of water pressure, and the water enters the circulation chamber 308 , and then left to the outlet pipe 311 through the circulation hole 312 and circulated to the water inlet end of the water pump. At this time, the water pump is used as a circulation pump; After entering the valve seat 302 from the water inlet pipe 310, it overflows the dividing plate 309 and then enters the water outlet pipe 311 through the flow limiting hole 313. At this time, the water pump is used as a booster pump. The utility model utilizes the current limiting and circulating electromagnetic valve to realize the control of the two states of current limiting and circulating, and utilizes the current limiting function of the current limiting and circulating electromagnetic valve to control the working pressure of water production. The water purifier can realize simultaneous discharge while producing water, which greatly enhances the convenience of use.

The filter element mechanism in this embodiment includes a primary filter element 51 , a secondary filter element 52 and a tertiary filter element 53 connected in series in sequence.

In this embodiment, the primary filter element 51 is an origami filter element with a pore size of 20 μm, the secondary filter element 52 is an activated carbon filter element, the tertiary filter element 53 is a PP cotton filter element, and the post filter 120 is a post activated carbon filter element.

In addition, the non-wastewater reverse osmosis water purifier of the utility model has added a strong discharge protection function. When the consumption of domestic water is relatively small, that is, when the continuous production of pure water is 6 liters and the domestic water consumption does not reach 6 liters (use When the amount of domestic water reaches 6 liters, the concentrated water in the water machine can be completely replaced with raw water) through the electric control device 80, the forced discharge protection solenoid valve is opened for forced discharge, and the forced discharge protection solenoid valve is automatically closed after 6 liters are discharged and accumulated again The water production time is the water production volume, so as to solve the damage to the RO membrane filter element 60 caused by abnormal use of the water machine, and to protect the RO membrane filter element 60 .

The water purifier of the present utility model is powered on and started each time, the second normally closed solenoid valve 111 is closed, the normally open solenoid valve 90 is opened, pure water is re-filtered before entering the water pump 40, and the normally open solenoid valve 90 is closed after 2 minutes of water production. The second normally closed solenoid valve 111 is opened to enter the normal water production state, and the water purification and return operation can effectively solve the problem of high TDS of water production by the RO membrane filter element 60 in the initial 2 minutes.

As shown in Figure 3-6, the change curve of the initial 2-minute water production volume and the TDS value of the water produced by the water purifier of the utility model, and the water production volume and the TDS value of the produced water after 2 minutes of water production The change curve, the following data table can be obtained:

Example 2

As shown in Figure 2, the filter element mechanism of the present embodiment comprises a secondary composite filter element 54 and a tertiary composite filter element 55 connected in parallel, and the water outlets of the secondary composite filter element 54 and the tertiary composite filter element 55 are respectively connected to the The water inlet end of the RO membrane filter element 60 is connected, and the pre-filter 20 is an origami filter element with a pore size of 20 μm.

The second-stage composite filter element 54 and the third-stage composite filter element 55 of the present embodiment are all composite filter elements of sintered activated carbon columns and PP cotton. The outer layer of the composite filter element is PP cotton with an aperture of 1-5 μm, filled with PP cotton There is a sintered activated carbon column, and the sintered activated carbon column is a hollow structure.

The function of the origami filter element is to filter larger particles in the raw water, so that the whole filter system can perform coarse filtration first and then fine filtration, and the surface area of the origami filter element is several times larger than that of the PP cotton filter element, thus prolonging the service life. The function of the composite filter element is to filter small particles in the raw water. The inner layer is sintered activated carbon. Its main function is to absorb residual chlorine in the raw water. Compared with granular carbon, the adsorption capacity of sintered activated carbon is more than 2 times stronger. The parallel connection of the secondary composite filter element 54 and the tertiary composite filter element 55 can exert its efficacy more effectively. By changing the connection mode and the structure of the filter element, the pretreatment effect and service life of the RO membrane filter element 60 can be maximized. The rest of this embodiment is the same as Embodiment 1, and will not be repeated here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art Personnel should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the utility model.

Claims (9)

1. one kind without waste water water-purifying machine, it is characterized in that: comprise connected successively by pipeline fore filter, entering water electromagnetic valve, water pump, filter core mechanism and RO membrane cartridge, described water-purifying machine also includes current limliting and circulating electromagnetic valve, check valve, high-voltage switch gear, water butt and post-filter

Described fore filter is connected with raw water tubes line, the pure water inlet of described RO membrane cartridge is connected with water purification rising pipe, the exit end of water purification rising pipe is connected with DI, DI is disposed with described check valve and described post-filter along water (flow) direction, the water side of post-filter is connected with pure water tap, and the DI of the feed-water end of described post-filter is connected with described water butt by water storage pipeline; Described high-voltage switch gear is arranged at described water storage pipeline;

The dense water out of described RO membrane cartridge is connected with dense water rising pipe, the exit end of dense water rising pipe is connected to dense water return water pipe, domestic water pipeline, dense water return water pipe is disposed with described current limliting and circulating electromagnetic valve and described check valve along water (flow) direction, the water side of dense water return water pipe is connected with the feed-water end of described water pump, and the water side of domestic water pipeline is connected with domestic water tap;

Described water-purifying machine also includes electric control gear, and described entering water electromagnetic valve, described high-voltage switch gear, described water pump and described current limliting and circulating electromagnetic valve are electrically connected with described electric control gear respectively.

2. according to claim 1 a kind of without waste water water-purifying machine, it is characterized in that: described current limliting and circulating electromagnetic valve comprise electromagnetic valve body and coordinate the valve seat installed with electromagnetic valve body, water eliminator and gasket is provided with between electromagnetic valve body and valve seat, spring is disposed with in the middle part of electromagnetic valve body, spool and silicon particle, silicon particle abuts with water eliminator, gasket and valve seat are rabbeted, circulation chamber is provided with in valve seat, dividing plate is provided with between circulation chamber and the inwall of valve seat, the height of dividing plate is less than the height of circulation chamber, the both sides of valve seat are respectively arranged with water inlet pipe and rising pipe, water inlet pipe is communicated with the inside of valve seat, circulation chamber offers circulation pore, rising pipe is communicated with circulation pore, rising pipe also offers metering hole, metering hole is communicated with the inside of valve seat.

3. according to claim 1 a kind of without waste water water-purifying machine, it is characterized in that: be provided with by-pass line between described raw water tubes line and described domestic water pipeline, by-pass line is provided with water flow switch and check valve.

4. according to claim 1 a kind of without waste water water-purifying machine; it is characterized in that: the exit end of described dense water rising pipe is also connected with forced-ventilated protection pipeline; forced-ventilated protection pipeline is provided with the first normally closed solenoid valve; the water outlet of the first normally closed solenoid valve is connected with sewer line, and the first normally closed solenoid valve is electrically connected with described electric control gear.

5. according to claim 1 a kind of without waste water water-purifying machine, it is characterized in that: the exit end of described water purification rising pipe is also connected with water purification return water pipe, water purification return water pipe is disposed with normally open solenoid valve and check valve along water (flow) direction, the exit end of water purification return water pipe is connected to the water side of described entering water electromagnetic valve, described DI is also provided with the second normally closed solenoid valve, and the second normally closed solenoid valve is arranged at the feed-water end of described DI.

6. according to the one in claim 1-5 described in any one without waste water water-purifying machine, it is characterized in that: described filter core mechanism comprises the one-level filter core, secondary filter core and the three grades of filter cores that are sequentially connected in series.

7. according to claim 6 a kind of without waste water water-purifying machine, it is characterized in that: described one-level filter core is the paper folding filter core in 20 μm, aperture, described secondary filter core is sintering activity charcoal filter core, and described three grades of filter cores are the cotton filter core of PP, and described post-filter is post active carbon filter core.

8. according to the one in claim 1-5 described in any one without waste water water-purifying machine, it is characterized in that: described filter core mechanism comprises the secondary composite filter element and three grades of composite filter elements that are connected in parallel, the water side of described secondary composite filter element, described three grades of composite filter elements is connected with the feed-water end of described RO membrane cartridge respectively, and described fore filter is the paper folding filter core in 20 μm, aperture.

9. according to claim 8 a kind of without waste water water-purifying machine, it is characterized in that: described secondary composite filter element, described three grades of composite filter elements are the composite filter element of sintering activity charcoal post and PP cotton, the skin of this composite filter element is the PP cotton of aperture 1-5 μm, be filled with sintering activity charcoal post in PP cotton, sintering activity charcoal post is hollow structure.