Non-pressure wastewater-free high-quality water production reverse osmosis water purifier

Abstract

The invention relates to a non-pressure wastewater-free high-quality water production reverse osmosis water purifier, which comprises a non-pressure water inlet and outlet valve system, a water purification system, a wastewater-free water bag type water storage tank, a pure water flushing device, a primary water discharge device, an alarm function and a computer control circuit, the water purifier is controlled to complete a circulating water production process of a standby state, a primary water production state, a water production state, a pure water flushing state and a standby returning state, the water purifier also has an alarm function, pure water and non-pure water can be discharged by a pure water three-pipe faucet and a non-pure water three-pipe faucet at any time, and the non-pure water is mixed water of tap water and concentrated pure water. According to the water purifier, tap water pressure is used as power amplifier pure water and non-pure water, the water purifier is basically in a non-pressure state when water is not discharged, the water production quality is improved by using the pure water flushing device and the primarily produced water discharging device, the service life of a reverse osmosis membrane is prolonged, and the water purifier has the advantages of no wastewater, ultra-large flow, low failure rate, small size, low cost and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of reverse osmosis water purifiers, and relates to technical problems such as whether there is wastewater, the size of the flow, improving water quality, and reasonable design of the internal water pressure of a reverse osmosis water purifier. BACKGROUND

[0002] With the continuous improvement of people's living standards, more and more people have begun to pay attention to drinking water hygiene, and various water purifiers have appeared on the market. At present, reverse osmosis water purifier production is developing extremely rapidly in China, and the proportion in the entire water purifier is becoming larger and larger.

[0003] The existing RO reverse osmosis water purifier storage tank is a gas bag type storage tank. In the water production process, pure water enters the gas in the gas bag in the pure water area 23, and in the water discharge process, the volume of air expands to release potential energy to discharge the pure water in the pure water area 23. There are many problems in its use: In the water production process of the gas bag type reverse osmosis water purifier, 75% of the water is not used, and when the wastewater is discharged into the wastewater ditch, water is wasted. The air in the gas bag type storage tank occupies more than 50% of the space in the tank, and the volume utilization rate of the tank is small.

[0004] In the process of discharging pure water, the gas pressure in the gas bag type storage tank will gradually decrease, and the pure water flow will decrease. The flow is better than that of the tankless reverse osmosis water purifier, but it is still uneven and the flow decreases quickly. In order to maintain a high flow, the gas bag type storage tank is set to discharge 30% of the water, and the high-pressure pump 11 of the water purifier is started, so that there is always more than 70% of water in the tank. The inlet and outlet of the storage tank are at the highest point of the barrel, and there is a lot of dead water, which is easy to breed bacteria.

[0005] The gas bag type storage tank must be installed with a gas nozzle, and a certain pressure of air must be given to the gas bag type storage tank before leaving the factory. If the storage tank is not inflated, there is air in the storage chamber, and the gas bag type storage tank cannot be used. If the inflation pressure does not meet the requirements, it will also affect the flow and water yield.

[0006] The gas bag type pressure tank has a large volume, poor pressure resistance, and a large amount of high-pressure air energy. Once the high-pressure switch fails, the explosion will be extremely destructive, and there have been many reports of gas bag type storage tank explosions. The gas bag type storage tank starts frequently, has many faults, a high damage rate, and a short service life of only two years.

[0007] Since 2020, the market trend has been towards large-flow reverse osmosis membranes 12, double reverse osmosis membranes 12, and tankless water purifiers. The use of large-flow reverse osmosis membranes 12 has the advantages of small size and no explosion damage, but a high price is paid for these two advantages: The pure water flow of the tankless water purifier is 0.5L / min-2L / min, which is smaller than that of the pressure tank water purifier, and the pure water cannot be discharged in the event of a power failure.

[0008] No tank water purifier water production at the same time, pure water, reverse osmosis membrane 12 initial production of pure water 500CC tds value is high, many users do not know, buy pure water machine, drink is thick pure water.

[0009] No tank water purifier booster pump power, high pressure, requires all accessories to improve technical indicators, greatly improve the cost and failure rate of water purifier.

[0010] No tank water purifier booster pump power, vibration, noise, some reverse osmosis water purifier to reduce noise and add sound insulation material, increase the volume.

[0011] Large flow reverse osmosis membrane 12 price, short life, low desalination rate.

[0012] No water tank can not solve the problem of reasonable use of thick water, water waste still exists. SUMMARY

[0013] The present application is a kind of pressureless waste water high quality water production of reverse osmosis water purifier, including pressureless water inlet and outlet valve system, water purification system, no waste water water bag type water tank 25, pure water flushing device, initial water discharge device, alarm function and computer control circuit, computer control circuit according to the information provided by position sensor 27, first conductivity / tds probe 31 and second conductivity / tds probe 32, control water purifier standby state, initial water production state, water production state, pure water flushing state and back to standby state of the cycle water production process, pure water three pipe faucet and non pure water three pipe faucet can put pure water and non pure water at any time, non pure water is tap water and thick pure water mixture. The water purifier of the present application uses tap water pressure to work to put pure water and non pure water, and is basically in a pressureless state when no water is put, the use of pure water flushing device and initial water discharge device improves the water production quality, prolongs the service life of reverse osmosis membrane 12, and has the advantages of no waste water, ultra large flow, low failure rate, small volume, low cost and the like.

[0014] In order to achieve the purpose of the present application, the following technical scheme is proposed: A pressureless waste water high quality water production of reverse osmosis water purifier ( Figure 1), comprising a non-pressure water inlet and outlet valve system, a water purification system, a non-waste water bladder type water storage tank 25 and a computer control circuit, wherein the non-pressure water inlet and outlet valve system is composed of a tap water inlet 1, a pure water three-way faucet and a non-pure water three-way faucet, a pure water three-way faucet water inlet valve 2 and a non-pure water three-way faucet water inlet valve 4 constitute a parallel water path, the three-way faucet is composed of a water inlet valve and a water outlet valve, and the water inlet valve and the water outlet valve of the three-way faucet are opened or closed synchronously; opening the pure water three-way faucet or the non-pure water three-way faucet, tap water enters the non-pure water area 29 through the tap water inlet 1, the parallel water path and the non-pure water inlet and outlet 26 of the bladder type water storage tank 25, and at the same time the pure water three-way faucet water outlet valve 3 discharges pure water or the non-pure water three-way faucet water outlet valve 5 discharges non-pure water; closing the pure water three-way faucet and the non-pure water three-way faucet, the water purifier is isolated from the tap water inlet 1 and is in a non-pressure state; the reverse osmosis water purifier of the patent does not use a three-way faucet, uses an ordinary faucet without a water inlet valve, and there is always tap water pressure in the water purifier, which is slightly less safe. If there is no water leakage, the working state of the reverse osmosis water purifier does not change and it works normally.

[0015] The water purification system is composed of a pre-filter core group 6, a high-pressure pump 11 and a reverse osmosis membrane 12 connected in sequence through pipelines, and the inlet of the pre-filter core group 6 communicates with the parallel water path of the water inlet valve.

[0016] The non-waste water bladder type water storage tank 25 uses an isolation membrane 30 to divide the non-waste water bladder type water storage tank 25 into a non-pure water area 29 and a pure water area 23; the non-pure water area 29 is provided with an exhaust valve 28, a non-pure water inlet and outlet 26 and a concentrated water inlet and outlet 24; the exhaust valve 28 is installed at the top of the non-pure water area 29; the non-pure water inlet and outlet 26 is located at a higher position of the non-pure water area 29 and communicates with the inlet of the pre-filter core group 6; the concentrated water inlet and outlet 24 is located at a lower position of the non-pure water area 29 and communicates with the non-pure water three-way faucet water outlet valve / non-pure water faucet 5, and the concentrated water inlet and outlet 24 communicates with the reverse osmosis membrane concentrated water outlet 15 through the parallel waste water ratio valve 16 and the normally-off electromagnetic valve 17; the pure water area 23 is provided with a pure water inlet and outlet 22, and the pure water inlet and outlet 22 communicates with the pure water three-way faucet water outlet valve / pure water faucet 3.

[0017] The reverse osmosis water purifier further comprises a pure water flushing device, a first three-way electromagnetic valve 7 is arranged between the front filter core group 6 and the high-pressure pump 11, the front filter core group 6 communicates with a constant-through port 9 of the first three-way electromagnetic valve, the high-pressure pump 11 communicates with a common port 8 of the first three-way electromagnetic valve, and a pure water inlet and outlet 22 of the pure water area 23 communicates with a constant-break port 10 of the first three-way electromagnetic valve. The pure water flushing device can be used in various reverse osmosis water purifiers, the difference is that the water used for pure water flushing is discharged to where, and the water used for pure water flushing in the patent returns to the non-pure water area without waste. The three-way electromagnetic valve is a combination of a constant-through electromagnetic valve and a constant-break electromagnetic valve, and the constant-through port communicates water when the power is off, the constant-break port communicates water in both directions, the constant-through port communicates water in both directions when the power is on, and the constant-break port communicates water.

[0018] The reverse osmosis water purifier further comprises a pure water quantity detection device, a position sensor 27 is arranged in the waste water bag type water storage tank 25, when the isolation membrane 30 moves to a position where the pure water is about to be discharged, a computer control circuit obtains a low position Y signal, when the isolation membrane 30 moves to a position where the pure water is about to be full, the computer control circuit obtains a high position Y signal, and the two predetermined positions of the computer control circuit can be adjusted according to the situation; the computer control circuit can convert the information provided by the position sensor 27 into the pure water quantity of the pure water area, and display the pure water quantity by using a digital tube.

[0019] The reverse osmosis water purifier further comprises a primary water discharge device, a second conductivity / tds probe 32 and a second three-way electromagnetic valve 18 are arranged between the reverse osmosis membrane pure water outlet 14 and the pure water inlet and outlet 22 of the pure water area 23, the reverse osmosis membrane pure water outlet 14 communicates with a common port 19 of the second three-way electromagnetic valve through the second conductivity / tds probe 32, the concentrated water inlet and outlet 24 of the non-pure water area 29 communicates with a constant-break port 21 of the second three-way electromagnetic valve, and the pure water inlet and outlet 22 of the pure water area 23 communicates with a constant-through port 20 of the second three-way electromagnetic valve; the computer control circuit sets the highest value of the conductivity / tds of the pure water as G0 for the second conductivity / tds probe 32, when the second conductivity / tds probe 32 detects that the conductivity / tds is equal to or lower than G0, the computer control circuit obtains a pure water qualified Y signal, and when the conductivity / tds is higher than G0, the computer control circuit obtains a pure water qualified N signal. The primary water discharge device can be used in various reverse osmosis water purifiers, the difference is that the discharged primary water is processed, and the discharged primary water in the patent returns to the non-pure water area without waste.

[0020] The reverse osmosis water purifier is in water production state, if the data provided by the position sensor 27 is basically unchanged for several minutes, it means that the water production path of the water purifier is blocked, there is a fault, the computer control circuit controls shutdown and sends out a fault alarm; the water purifier has a minimum normal water production speed, the water production time is calculated according to this speed, if the continuous water production time exceeds the set time, it means that some filter element has large resistance, the filter element needs to be replaced, when the water production time exceeds the set time, the computer control circuit controls shutdown and sends out a filter element replacement alarm; when the computer control circuit obtains the tds value provided by the second conductivity / tds probe 32 as an unqualified signal for a certain time, it means that the reverse osmosis membrane water production quality has a problem, the computer control circuit controls shutdown and sends out a reverse osmosis membrane replacement alarm.

[0021] The reverse osmosis water purifier also includes a concentrated water conductivity / tds control device, the inner wall of the low position of the non-waste water water bag type water storage tank 25 non-pure water area 29 is provided with a first conductivity / tds probe 31; the computer control circuit sets the minimum conductivity / tds value of the first conductivity / tds probe 31 as G2, and the maximum value as G3, when the first conductivity / tds probe 31 detects that the conductivity / tds is lower than G2, the computer control circuit obtains a low tdsY signal, when the first conductivity / tds probe 31 detects that the conductivity / tds value is higher than G3, the computer control circuit obtains a high tdsY signal, the two conductivity / tds values set by the computer control circuit need to be adjusted according to the water quality of each place.

[0022] The computer control circuit sets the maximum conductivity / tds value of the second conductivity / tds probe 32 as G0, the conductivity / tds value of tap water as G1, the minimum conductivity / tds value of the first conductivity / tds probe 31 as G2, and the maximum conductivity / tds value as G3, the size relationship of each conductivity / tds value is: G0<G1<G2<G3. The computer control circuit can display the measured conductivity / tds values of the first conductivity / tds probe 31 and the second conductivity / tds probe 32 by using a digital tube.

[0023] The computer control circuit working flow chart of the reverse osmosis water purifier provided with the first conductivity / tds probe 31 is shown in FIG. 3, which includes the following four steps that are continuously cycled: The reverse osmosis water purifier needs to empty the air inside the non-waste water water bag type water storage tank 25, under the condition that the air inside the non-waste water water bag type water storage tank 25 is emptied, the reverse osmosis water purifier is powered on, if the computer control circuit obtains at least one of the low position N and the low tdsN signal, the computer control circuit controls the high-pressure pump 11 and all electromagnetic valves to be powered off, the reverse osmosis water purifier is in standby state; The reverse osmosis water purifier, if non-pure water is discharged through the non-pure water three-way faucet, the signal provided by the first conductivity / tds probe 31 changes, and if pure water is discharged through the pure water three-way faucet, the signals provided by the first conductivity / tds probe 31 and the position sensor 27 both change; when the computer control circuit obtains the low position Y and the low tds Y signals simultaneously or successively, the computer control circuit controls the second three-way electromagnetic valve 18 and the high-pressure pump 11 to be powered on, the first three-way electromagnetic valve 7 and the normally-off electromagnetic valve 17 are powered off, and the water purifier enters the initial water production state; in the initial water production state, the reverse osmosis membrane pure water outlet 14 is disconnected from the pure water inlet and outlet 22 and connected to the concentrated water inlet and outlet 24, and the tds of the initial pure water flowing out of the reverse osmosis membrane pure water outlet 14 flows into the non-pure water area 29; In the initial water production state of the reverse osmosis water purifier, the second conductivity / tds probe 32 monitors the water quality of the reverse osmosis membrane pure water outlet 14, and when the computer control circuit obtains the pure water qualified Y signal, the computer control circuit controls the high-pressure pump 11 to be powered on, the first three-way electromagnetic valve 7, the second three-way electromagnetic valve 18 and the normally-off electromagnetic valve 17 are powered off, and the water purifier enters the water production state; in the water production state, the reverse osmosis membrane pure water outlet 14 is connected to the pure water inlet and outlet 22 and disconnected from the concentrated water inlet and outlet 24, and the qualified pure water flowing out of the reverse osmosis membrane pure water outlet 14 flows into the pure water area 23. In the water production process of the reverse osmosis water purifier, the isolation membrane 30 moves, the concentrated water flows back to the non-pure water area 29, and the signals provided by the position sensor 27 and the first conductivity / tds probe 31 change; when the computer control circuit obtains at least one of the high position Y and the high tds Y signals, the computer control circuit controls the high-pressure pump 11, the first three-way electromagnetic valve 7 to be powered on, the second three-way electromagnetic valve 18 to be powered off, and the normally-off electromagnetic valve 17 to be powered on or powered off, and the water purifier enters the pure water first flushing state or the pure water second flushing state; after a predetermined time of pure water flushing, the water purifier returns to the standby state.

[0024] The reverse osmosis water purifier is used in areas where the quality of tap water is relatively good, and the non-pure water area 29 can not be provided with the first conductivity / tds probe 31; the water purifier without detecting the conductivity / tds of the non-pure water area 29, the computer control circuit control process does not have the judgment of tds < G2 and tds > G3, and the other processes are the same as those of the water purifier with detecting the conductivity / tds of the non-pure water area 29. Figure 2 , Figure 4 ).

[0025] The reverse osmosis water purifier of the present application works in a full range of pressure-free states, and in most cases, the tap water pressure is used to work to discharge two kinds of water, and the flow rate is much larger than that of the existing reverse osmosis water purifier, and the waste water tank 25 is not used, so that no waste water is discharged; the reverse osmosis water purifier has the advantages of pressure-free, waste water-free, high water production quality, super large flow rate, small size, simple structure, low cost, long service life of the reverse osmosis membrane 12 and the like. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the principle diagram of the reverse osmosis water purifier with conductivity / tds detection of the present application.

[0027] Figure 2 is the principle diagram of the reverse osmosis water purifier without conductivity / tds detection of the present application.

[0028] Figure 3 is the computer control flow diagram of the reverse osmosis water purifier with conductivity / tds detection of the present application.

[0029] Figure 4 is the computer control flow diagram of the reverse osmosis water purifier without conductivity / tds detection of the present application.

[0030] Figure 5 is the three-cycle flow diagram of the reverse osmosis water purifier of the present application.

[0031] Wherein: 1 tap water inlet, 2 pure water three-way faucet water inlet valve, 3 pure water three-way faucet water outlet valve / pure water faucet, 4 non-pure water three-way faucet water inlet valve, 5 non-pure water three-way faucet water outlet valve / non-pure water faucet, 6 pre-filter cartridge group, 7 first three-way electromagnetic valve, 8 first three-way electromagnetic valve common port, 9 first three-way electromagnetic valve always-on port, 10 first three-way electromagnetic valve always-off port, 11 high-pressure pump, 12 reverse osmosis membrane, 13 reverse osmosis membrane inlet, 14 reverse osmosis membrane pure water outlet, 15 reverse osmosis membrane concentrated water outlet, 16 waste water ratio valve, 17 always-off electromagnetic valve, 18 second three-way electromagnetic valve, 19 second three-way electromagnetic valve common port, 20 second three-way electromagnetic valve always-on port, 21 second three-way electromagnetic valve always-off port, 22 pure water inlet and outlet, 23 pure water area, 24 concentrated water inlet and outlet, 25 waste water-free water bag type water storage tank, 26 non-pure water inlet and outlet, 27 position sensor, 28 exhaust valve, 29 non-pure water area, 30 separation membrane, 31 first conductivity / tds probe, 32 second conductivity / tds probe. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present application more clear and obvious, the present application is further described in detail below in combination with the drawings and specific embodiments.

[0033] With reference to Figures 1-4 , the working process of the reverse osmosis water purifier with conductivity / tds detection of the present application is as follows: Preparation: connect the reverse osmosis water purifier with no pressure and no waste water for high-quality water production, the water purifier is not powered on, open the pure water three-way faucet, the tap water enters the water storage tank non-pure water area 29, the pure water area 23 space is compressed to zero, the water and air are discharged from the pure water three-way faucet water outlet valve / pure water faucet 3, open the exhaust valve 28 to exhaust until the exhaust valve 28 discharges water, immediately close the exhaust valve 28 and the pure water three-way faucet, the water purifier is powered on, and the initial water production begins.

[0034] Standby to initial water: One possibility: because the conductivity / tds value is higher than G3 standby, put pure water or non-pure water, tap water into the non-pure water area 29, the conductivity / tds probe A31 measures the conductivity / tds constantly decreases, when the conductivity / tds value is lower than G2, standby to initial water; another possibility: because the pure water is full of standby, put pure water, pure water area 23 pure water constantly decreases, when the pure water area 23 pure water is almost empty, standby to initial water state.

[0035] Initial water to water: Because of the diffusion of calcium and magnesium ions in the reverse osmosis membrane, the tds value of the initial water is higher, the initial water state computer control circuit will put the pure water of the initial water into the non-pure water area, when the water quality is qualified, it will be converted to water state, and the computer control circuit will put the qualified pure water into the pure water area.

[0036] Water to flush: One possibility: more and more pure water during water production, when the pure water is full, the computer control circuit obtains a high position Y signal; another possibility: the conductivity / tds of the non-pure water area 29 water is constantly increasing, when the conductivity / tds probe A31 measures the conductivity / tds value is higher than G3, the computer control circuit obtains a high tds Y signal, and the water is converted to pure water flushing (pure water first flushing state or pure water second flushing state).

[0037] Pure water flushing to standby: After a certain period of pure water flushing, the computer control circuit controls the high pressure pump 11 and all solenoid valves to be powered off, and the flushing is converted to standby state.

[0038] Put pure water and non-pure water: In any case, open the pure water three pipe faucet to put pure water, open the non-pure water three pipe faucet to put non-pure water, and put water at the same time to dilute the concentrated water in the non-pure water area 29.

[0039] Data analysis of three consecutive cycles of non-pressure and waste-free high-quality water purifier: Water filtration in waste-free reverse osmosis water purifier is a continuous cycle process, and the specific effect can be explained by theoretical data. Set a as pure water unit, b as macroscopic large particle pollutant unit, and C as micro-molecular pollutant unit. The pre-filter set 6 is to filter macroscopic large particle pollutants, and the reverse osmosis membrane 12 is to filter micro-molecular pollutants. Set the output of the reverse osmosis membrane 12 to be one to two of pure water and concentrated water. The data of three cycle processes are as shown in Figure 5 .

[0040] The tap water in the initial state input storage tank is 3a+3b+3c, and the filtered water 3a+3c is obtained by passing through the pre-filter core group 6, and is stored in two areas of the storage tank by passing through the reverse osmosis membrane 12. The water in each cycle of the non-pure water area 29 is circulated for one cycle, and is decomposed into one-third of pure water and two-thirds of concentrated water. After three cycles, the pure water 2.11a in the pure water area 23 accounts for 70% of the volume of the storage tank, and the concentrated water in the non-pure water area 29 is 0.89a+3c, and the concentration of the water is 3.3 times that of the tap water. It is shown that in the case of no pure water and tap water, the number of water circulation in the water purifier is large, and the conductivity / tds rises faster. In the area where the quality of tap water is good, the conductivity / tds can not be detected. In the area where the quality of tap water is poor, the conductivity / tds value of the water in the non-pure water area 29 must be detected by the computer control circuit. When the conductivity / tds value exceeds G3, the high-pressure pump 11 stops, and the pure water or tap water is discharged to reduce the concentration of the water in the non-pure water area 29. The water can continue to be produced, and the pure water can account for more than 90% of the volume of the storage tank.

[0041] The above-described specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above-described specific embodiments are only examples of the present application and are not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the principles and methods of the present application should be included in the protection scope of the present application.

Claims

1. A reverse osmosis water purifier for producing high quality water without waste water, characterized in that, The reverse osmosis water purifier comprises a water purifying system, a waste water free water bag type water storage tank (25) and a computer control circuit, wherein the water purifying system is sequentially connected by a tap water inlet (1), a pre-filter core group (6), a high pressure pump (11) and a reverse osmosis membrane (12) through pipelines. The waste water free water bag type water storage tank (25) is divided into a non-pure water area (29) and a pure water area (23) by an isolation membrane (30); the non-pure water area (29) is provided with a non-pure water inlet and outlet (26) and a concentrated water inlet and outlet (24); the non-pure water inlet and outlet (26) is communicated with an inlet of the pre-filter core group (6); an outlet of the high pressure pump (11) is communicated with an inlet (13) of the reverse osmosis membrane; the concentrated water inlet and outlet (24) is communicated with a non-pure water faucet (5) and a concentrated water outlet (15) of the reverse osmosis membrane through a waste water ratio valve (16) and a normally-off electromagnetic valve (17) in parallel; the pure water area (23) is provided with a pure water inlet and outlet (22) which is communicated with a pure water faucet (3) and a pure water outlet (14) of the reverse osmosis membrane. The reverse osmosis water purifier further comprises a pure water flushing device, a first three-way electromagnetic valve (7) is arranged between the pre-filter core group (6) and the high pressure pump (11); the pre-filter core group (6) is communicated with a normally-on port (9) of the first three-way electromagnetic valve; the high pressure pump (11) is communicated with a common port (8) of the first three-way electromagnetic valve; the pure water inlet and outlet (22) of the pure water area (23) is communicated with a normally-off port (10) of the first three-way electromagnetic valve.

2. The reverse osmosis water purifier according to claim 1, wherein The reverse osmosis water purifier further comprises a pure water quantity detection device, the waste water free water bag type water storage tank (25) is provided with a position sensor (27); when the isolation membrane (30) moves to a position where pure water is about to be exhausted, a low position Y signal is obtained by the computer control circuit; when the isolation membrane (30) moves to a position where pure water is about to be filled, a high position Y signal is obtained by the computer control circuit; the two predetermined positions of the computer control circuit can be adjusted according to conditions.

3. The reverse osmosis water purifier according to claim 2, wherein The pure water quantity detection device further has an alarm function; if the data provided by the position sensor (27) is basically unchanged for several minutes, the computer control circuit controls shutdown and sends a fault alarm; if the continuous water production time exceeds a set time, the computer control circuit controls shutdown and sends a filter core replacement alarm.

4. The reverse osmosis water purifier according to claim 1 or 2 or 3, wherein The reverse osmosis water purifier also comprises a primary water discharge device, a second conductivity / tds probe (32) and a second three-way electromagnetic valve (18) are arranged between the reverse osmosis membrane pure water outlet (14) and the pure water inlet and outlet (22) of the pure water area (23), the reverse osmosis membrane pure water outlet (14) is communicated with the second three-way electromagnetic valve common port (19) through the second conductivity / tds probe (32), the concentrated water inlet and outlet (24) of the non-pure water area (29) is communicated with the second three-way electromagnetic valve constant break port (21), and the pure water inlet and outlet (22) of the pure water area (23) is communicated with the second three-way electromagnetic valve constant pass port (20); the computer control circuit sets the highest value of the pure water conductivity / tds as G0 for the second conductivity / tds probe (32), when the second conductivity / tds probe (32) detects that the conductivity / tds is equal to or lower than G0, the computer control circuit obtains a pure water qualified Y signal, and when the conductivity / tds is higher than G0, a pure water qualified N signal is obtained.

5. The reverse osmosis water purifier according to claim 4, wherein The primary water discharge device also has an alarm function, when the computer control circuit obtains the pure water qualified N signal from the second conductivity / tds probe (32) for more than a certain time, the computer control circuit controls shutdown and sends an alarm for replacing the reverse osmosis membrane.

6. The reverse osmosis water purifier according to claim 5, wherein The reverse osmosis water purifier has a whole water preparation process, which comprises the following four steps which are continuously cycled: The reverse osmosis water purifier needs to discharge the air in the waste water bag type water storage tank (25), and under the condition that the air in the waste water bag type water storage tank (25) is discharged, the reverse osmosis water purifier is powered on, if the computer control circuit obtains a low position N signal, the high-pressure pump (11) and all electromagnetic valves are controlled to be powered off, and the reverse osmosis water purifier is in a standby state; When the reverse osmosis water purifier opens the pure water faucet (3) to discharge pure water, the signal provided by the position sensor (27) changes, when the computer control circuit obtains a low position Y signal, the computer control circuit controls the second three-way electromagnetic valve (18) and the high-pressure pump (11) to be powered on, the first three-way electromagnetic valve (7) and the constant break electromagnetic valve (17) are powered off, and the water purifier enters a primary water preparation state; In the primary water preparation state of the reverse osmosis water purifier, the second conductivity / tds probe (32) monitors the water quality of the water flowing out of the reverse osmosis membrane pure water outlet (14), when the computer control circuit obtains a pure water qualified Y signal, the computer control circuit controls the high-pressure pump (11) to be powered on, the first three-way electromagnetic valve (7), the second three-way electromagnetic valve (18) and the constant break electromagnetic valve (17) are powered off, and the water purifier enters a water preparation state; In the water preparation process of the reverse osmosis water purifier, the isolation membrane (30) moves, the concentrated water flows back to the non-pure water area (29), the signal provided by the position sensor (27) changes, when the computer control circuit obtains a high position Y signal, the computer control circuit controls the high-pressure pump (11) and the first three-way electromagnetic valve (7) to be powered on, the second three-way electromagnetic valve (18) is powered off, and the constant break electromagnetic valve 17 is powered on or powered off, the water purifier enters a pure water first flushing state or a pure water second flushing state, after a predetermined time of pure water flushing, the water purifier returns to the standby state.

7. The reverse osmosis water purifier according to claim 5, wherein The reverse osmosis water purifier includes a concentrated purified water conductivity / tds control device, the inner wall of the non-waste water water bag type water storage tank (25) is provided with a first conductivity / tds probe (31) at a low position of the non-purified water area (29); the computer control circuit sets the minimum conductivity / tds value of the first conductivity / tds probe (31) as G2 and the maximum value as G3; when the first conductivity / tds probe (31) detects that the conductivity / tds is lower than G2, the computer control circuit obtains a low tdsY signal; when the first conductivity / tds probe (31) detects that the conductivity / tds value is higher than G3, the computer control circuit obtains a high tdsY signal; the two conductivity / tds values set by the computer control circuit need to be adjusted according to the water quality of different places.

8. The reverse osmosis water purifier according to claim 7, wherein The reverse osmosis water purifier includes a concentrated purified water conductivity / tds control device, the inner wall of the non-waste water water bag type water storage tank (25) is provided with a first conductivity / tds probe (31) at a low position of the non-purified water area (29); the computer control circuit sets the minimum conductivity / tds value of the first conductivity / tds probe (31) as G2 and the maximum value as G3; when the first conductivity / tds probe (31) detects that the conductivity / tds is lower than G2, the computer control circuit obtains a low tdsY signal; when the first conductivity / tds probe (31) detects that the conductivity / tds value is higher than G3, the computer control circuit obtains a high tdsY signal; the two conductivity / tds values set by the computer control circuit need to be adjusted according to the water quality of different places. The reverse osmosis water purifier includes a concentrated purified water conductivity / tds control device, the inner wall of the non-waste water water bag type water storage tank (25) is provided with a first conductivity / tds probe (31) at a low position of the non-purified water area (29); the computer control circuit sets the minimum conductivity / tds value of the first conductivity / tds probe (31) as G2 and the maximum value as G3; when the first conductivity / tds probe (31) detects that the conductivity / tds is lower than G2, the computer control circuit obtains a low tdsY signal; when the first conductivity / tds probe (31) detects that the conductivity / tds value is higher than G3, the computer control circuit obtains a high tdsY signal; the two conductivity / tds values set by the computer control circuit need to be adjusted according to the water quality of different places. The reverse osmosis water purifier includes a concentrated purified water conductivity / tds control device, the inner wall of the non-waste water water bag type water storage tank (25) is provided with a first conductivity / tds probe (31) at a low position of the non-purified water area (29); the computer control circuit sets the minimum conductivity / tds value of the first conductivity / tds probe (31) as G2 and the maximum value as G3; when the first conductivity / tds probe (31) detects that the conductivity / tds is lower than G2, the computer control circuit obtains a low tdsY signal; when the first conductivity / tds probe (31) detects that the conductivity / tds value is higher than G3, the computer control circuit obtains a high tdsY signal; the two conductivity / tds values set by the computer control circuit need to be adjusted according to the water quality of different places. The reverse osmosis water purifier includes a concentrated purified water conductivity / tds control device, the inner wall of the non-waste water water bag type water storage tank (25) is provided with a first conductivity / tds probe (31) at a low position of the non-purified water area (29); the computer control circuit sets the minimum conductivity / tds value of the first conductivity / tds probe (31) as G2 and the maximum value as G3; when the first conductivity / tds probe (31) detects that the conductivity / tds is lower than G2, the computer control circuit obtains a low tdsY signal; when the first conductivity / tds probe (31) detects that the conductivity / tds value is higher than G3, the computer control circuit obtains a high tdsY signal; the two conductivity / tds values set by the computer control circuit need to be adjusted according to the water quality of different places. ​ 9. The reverse osmosis water purifier according to claim 1 or 2 or 3 or 5 or 6 or 7 or 8, characterized in that, The reverse osmosis water purifier comprises a pressureless water inlet and outlet valve system which is composed of a tap water inlet (1), a pure water three-way faucet and a non-pure water three-way faucet, the pure water three-way faucet water inlet valve (2) and the non-pure water three-way faucet water inlet valve (4) constitute a parallel water path, the three-way faucet is composed of a water inlet valve and a water outlet valve, and the water inlet valve and the water outlet valve of the three-way faucet are synchronously opened or closed; opening the pure water three-way faucet or the non-pure water three-way faucet, tap water enters the non-pure water area (29) through the tap water inlet (1), the parallel water path and the non-pure water inlet and outlet (26) of the water bag type water storage tank (25), at the same time, the pure water three-way faucet water outlet valve (3) discharges pure water or the non-pure water three-way faucet water outlet valve (5) discharges non-pure water; closing the pure water three-way faucet and the non-pure water three-way faucet, the water purifier is isolated from the tap water inlet (1) and is in a pressureless state.

10. A reverse osmosis water purification method for producing high-quality water without waste water, characterized by, The method is realized by the water purifier according to any one of claims 1-9, and the method comprises: S1, the air in the waste water water bag type water storage tank (25) is exhausted, and under the condition that the air in the waste water water bag type water storage tank (25) is exhausted, the reverse osmosis water purifier is powered on, if the computer control circuit obtains a low position N signal, the high-pressure pump (11) and all electromagnetic valves are controlled to be powered off, and the reverse osmosis water purifier is in a standby state; S2, when the reverse osmosis water purifier opens the pure water faucet (3) to discharge pure water, the signal provided by the position sensor (27) changes; when the computer control circuit obtains a low position Y signal, the computer control circuit controls the second three-way electromagnetic valve (18) and the high-pressure pump (11) to be powered on, the first three-way electromagnetic valve (7) and the always-off electromagnetic valve (17) are powered off, and the water purifier enters an initial water production state; S3, in the initial water production state of the reverse osmosis water purifier, the second conductivity / tds probe (32) monitors the water quality flowing out of the reverse osmosis membrane pure water outlet (14), when the computer control circuit obtains a pure water qualified Y signal, the computer control circuit controls the high-pressure pump (11) to be powered on, the first three-way electromagnetic valve (7), the second three-way electromagnetic valve (18) and the always-off electromagnetic valve (17) are powered off, and the water purifier enters a water production state; S4, in the water production process of the reverse osmosis water purifier, the isolation membrane (30) moves, the concentrated pure water flows back to the non-pure water area (29), and the signal provided by the position sensor (27) changes; when the computer control circuit obtains a high position Y signal, the computer control circuit controls the high-pressure pump (11), the first three-way electromagnetic valve (7) to be powered on, the second three-way electromagnetic valve (18) to be powered off, and the always-off electromagnetic valve 17 to be powered on or powered off, the water purifier enters a pure water first flushing state or a pure water second flushing state, and after a predetermined time of pure water flushing, the water purifier returns to the standby state.

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