Direct drinking water system

Abstract

The utility model discloses a direct drinking water system, which belongs to the technical field of direct drinking water and comprises a raw water tank, a sand carbon filter, an RO (reverse osmosis) membrane system, an intrusive ultraviolet sterilizer, a water supply ultraviolet sterilizer, a water supply filter and a PLC (programmable logic controller). The second water pipe is provided with a raw water pump, a first flowmeter and a second pressure gauge, the sand carbon filter is connected with a third water pipe, the third water pipe is provided with a third pressure gauge, a second automatic valve, a high-pressure pump and a fourth pressure gauge, the RO membrane system is connected with a fourth water pipe, and the fourth water pipe is provided with a second flowmeter and a third automatic valve. The intrusive ultraviolet sterilizer is connected with the water supply ultraviolet sterilizer, the water supply ultraviolet sterilizer is connected with the water supply filter, the water supply filter is connected with the floor direct drinking water point, and the PLC is connected with the pressure gauges, the flow meters and the pumps.

Description

Technical Field

[0001] The utility model belongs to the technical field of direct drinking water, and in particular relates to a direct drinking water system. Background Art

[0002] Municipal units, schools, hospitals, office buildings, military camps, hotels, villas, airports and other places generally need to provide purified drinking water to meet people's daily needs. The traditional water supply process has a single sterilization method, which is not thorough and difficult to meet the direct drinking standard. Existing purified water is generally supplied by a single machine or one machine for multiple supplies, which is difficult to meet the demand for centralized and large-scale supply of direct drinking water. The existing direct drinking water system does not have the function of pipeline circulation sterilization and disinfection. When part of the water supply network or the water terminal has not used water for a long time, there will be dead water in the network, which is easy to cause secondary bacterial growth. In addition, the existing direct drinking water has poor taste.

[0003] The Chinese patent with publication number CN103351077A and publication date 2013-10-16 discloses a multifunctional full-effect direct drinking water system, including an electric control device, and a raw water tank, a raw water pump, a multi-media filter, an activated carbon filter, a water softener and a dosing device thereof, a drug washing device, a security filter, a high-pressure pump, a reverse osmosis device including several RO membranes, a pure water tank, an ultraviolet sterilization device, a variable frequency water supply pump, a post-fine filter, a post-regulator, and a pipe network water end forming a direct drinking water production pipeline, an ozone mixer and an ozone generator connected thereto are provided on the pipeline between the reverse osmosis device and the pure water tank, and the pipe network water end is connected to the pure water tank through a return water filter device to form a return water circulation sterilization and disinfection pipeline. This patent has the disadvantage of low automation. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a direct drinking water system, in which raw water enters a raw water tank through a first water pipe, a first pressure gauge detects the pressure of the raw water, the raw water flows out of the raw water tank and flows into a sand carbon filter through a raw water pump, the sand carbon filter removes large particles of impurities, a first flow meter and a second pressure gauge on a second water pipe detect the flow and pressure of the water in the pipe, a third pressure gauge detects the pressure of the water after the sand carbon filter removes impurities, and the second pressure gauge and the third pressure gauge on the third water pipe can be compared to determine whether the sand carbon filter is blocked; a fourth pressure gauge detects the pressure of the water after the high-pressure pump is pressurized, the water after the impurities are removed is pressurized and flows into an RO membrane system to remove dissolved salts, colloids, bacteria, viruses, organic matter and other substances harmful to the human body in the water, and the water filtered by the RO membrane system flows into an invasive ultraviolet sterilizer through the fourth water pipe. The invasive ultraviolet sterilizer removes unfiltered bacteria and viruses in the water, and the second flowmeter on the fourth water pipe detects the water flow in the pipe; after the first sterilization, the water flows into the water supply ultraviolet sterilizer through the fifth water pipe for secondary sterilization, and the water after the secondary sterilization flows into the water supply filter through the sixth water pipe and the water supply pump for further impurity removal, and the fifth pressure gauge on the sixth water pipe detects the pressure of the water after the water supply pump is pressurized; the water filtered by the water supply filter is transported to the direct drinking water point on the floor through the seventh water pipe for direct drinking, and the sixth pressure gauge and the third flowmeter on the seventh water pipe detect the pressure and flow of the direct drinking water; the PLC controller directly controls the valve opening of the first automatic valve, the second automatic valve and the third automatic valve, as well as the start and stop of the raw water pump, the high-pressure pump and the water supply pump through the PLC controller by collecting the pressure and flow at various places, so that the direct drinking water can be automatically controlled.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A direct drinking water system, comprising a raw water tank, a sand carbon filter, an RO membrane system, an invasive ultraviolet sterilizer, a water supply ultraviolet sterilizer, a water supply filter and a PLC controller, wherein the raw water tank is connected to a first water pipe and a second water pipe, the first water pipe is provided with a first pressure gauge and a first automatic valve, the second water pipe is provided with a raw water pump, a first flow meter and a second pressure gauge, the sand carbon filter is connected to a third water pipe, the third water pipe is provided with a third pressure gauge, a second automatic valve, a high-pressure pump and a fourth pressure gauge, the RO membrane system is connected to a fourth water pipe, the fourth water pipe is provided with a second flow meter and a third automatic valve, the invasive ultraviolet sterilizer is connected to a first water pipe and a second water pipe, the first water pipe is provided with a first pressure gauge and a first automatic valve, the second water pipe is provided with a raw water pump, a first flow meter and a second pressure gauge, the third water pipe is provided with a third pressure gauge, a second automatic valve, a high-pressure pump and a fourth pressure gauge, the RO membrane system is connected to a fourth water pipe, the fourth water pipe is provided with a second flow meter and a third automatic valve, the invasive ultraviolet sterilizer is connected to a first water pipe and a second water pipe, the first water pipe is provided with a first pressure gauge and a first automatic valve, the second water pipe is provided with a first pressure gauge and a second ... The line sterilizer is connected to the water supply ultraviolet sterilizer through the fifth water pipe, the water supply ultraviolet sterilizer is connected to the water supply filter through the sixth water pipe, the sixth water pipe is provided with a water supply pump and a fifth pressure gauge, the water supply filter is connected to the direct drinking water point on the floor through the seventh water pipe, and the seventh water pipe is provided with a sixth pressure gauge and a third flow meter; the PLC controller is connected to the first pressure gauge, the first automatic valve, the raw water pump, the first flow meter, the second pressure gauge, the third pressure gauge, the second automatic valve, the high-pressure pump, the fourth pressure gauge, the second flow meter, the third automatic valve, the water supply ultraviolet sterilizer, the water supply pump, the fifth pressure gauge, the sixth pressure gauge and the third flow meter.

[0007] Preferably, the first water pipe is also provided with a pulse aeration device, and the seventh water pipe is also provided with a small molecule machine.

[0008] Preferably, a low-pressure protector is provided on the second water pipe, and a high-pressure protector is provided on the fourth water pipe.

[0009] Preferably, a scale inhibitor adding device is also provided between the sand carbon filter and the high-pressure pump.

[0010] Preferably, the raw water tank and the invasive ultraviolet sterilizer are respectively provided with a first liquid level sensor and a second liquid level sensor.

[0011] Preferably, a safety filter is provided in front of the RO membrane system, and a seventh pressure gauge is provided on the third water pipe at the rear end of the safety filter.

[0012] Preferably, a concentrate discharge pipe is provided at the lower end of the RO membrane system, and a RO concentrate pressure gauge, a RO concentrate automatic valve and a RO concentrate flow meter are provided on the concentrate discharge pipe.

[0013] Preferably, a main return water pipe is provided behind the direct drinking water point on the floor, and a return water flow meter, a return water conductivity meter and a return water pressure gauge are provided on the main return water pipe. The main return water pipe is connected to the first return water branch pipe and the second return water branch pipe, the first return water branch pipe is connected to the invasive ultraviolet sterilizer, the second return water branch pipe is connected to the raw water tank, the first return water branch pipe is provided with a first return water automatic valve, and the second return water branch pipe is provided with a second return water automatic valve.

[0014] Preferably, the second water pipe is connected to the raw water tank via a raw water return pipe, and a raw water return automatic valve is provided on the raw water return pipe.

[0015] Preferably, the third water pipe, the fourth water pipe and the seventh water pipe are respectively provided with a first conductivity meter, a second conductivity meter and a third conductivity meter.

[0016] Preferably, the fourth water pipe is connected to the unqualified water pipe, and the unqualified water pipe is provided with an unqualified water return automatic valve.

[0017] Preferably, two invasive ultraviolet sterilizers are provided.

[0018] Preferably, two water supply pumps are provided.

[0019] The beneficial effects of this technical solution are as follows:

[0020] 1. The utility model provides a direct drinking water system. Raw water enters a raw water tank through a first water pipe. A first pressure gauge detects the pressure of the raw water. The raw water flows out of the raw water tank and flows into a sand carbon filter through a raw water pump. The sand carbon filter removes large particles of impurities. A first flow meter and a second pressure gauge on a second water pipe detect the flow and pressure of water in the pipe. A third pressure gauge detects the pressure of water after the sand carbon filter removes impurities. The second pressure gauge and the third pressure gauge on the third water pipe can be compared to determine whether the sand carbon filter is clogged. A fourth pressure gauge detects the pressure of water after the high-pressure pump pressurizes the water. The water after the impurities are removed is pressurized and flows into an RO membrane system to remove dissolved salts, colloids, bacteria, viruses, organic matter and other substances harmful to the human body. The water filtered by the RO membrane system flows into an invasive ultraviolet sterilizer through a fourth water pipe. The ultraviolet sterilizer removes unfiltered bacteria and viruses in the water, and the second flowmeter on the fourth water pipe detects the water flow in the pipe; after the first sterilization, the water flows into the water supply ultraviolet sterilizer through the fifth water pipe for secondary sterilization, and the water after the secondary sterilization flows into the water supply filter through the sixth water pipe and the water supply pump for further impurity removal, and the fifth pressure gauge on the sixth water pipe detects the pressure of the water after the water supply pump is pressurized; the water filtered by the water supply filter is transported to the direct drinking water point on the floor through the seventh water pipe for direct drinking, and the sixth pressure gauge and the third flowmeter on the seventh water pipe detect the pressure and flow of the direct drinking water; the PLC controller directly controls the valve opening of the first automatic valve, the second automatic valve and the third automatic valve, as well as the start and stop of the raw water pump, the high-pressure pump and the water supply pump through the PLC controller by collecting the pressure and flow at various places, so that the direct drinking water can be automatically controlled.

[0021] 2. The utility model provides a direct drinking water system. When the water pressure in the second water pipe is lower than the set value, the low-pressure protector transmits a signal to the PLC controller, and the PLC controller stops running the raw water pump to prevent damage to the raw water pump; when the water pressure in the fourth water pipe is higher than the set value, the high-pressure protector transmits a signal to the PLC controller, and the PLC controller stops running the high water pump to avoid damage to the RO membrane system due to excessive pressure.

[0022] 3. The utility model provides a direct drinking water system, in which the antiscalant adding device is provided to prevent impurities in the water from scaling in the water pipes and affecting the subsequent system operation.

[0023] 4. The utility model provides a direct drinking water system, in which the first liquid level sensor and the second liquid level sensor respectively detect the liquid levels of the raw water tank and the invasive ultraviolet sterilizer, and the PLC controller cooperates with the automatic control valve and the pump to make the liquid levels of the raw water tank and the invasive ultraviolet sterilizer at the set values, so that the system operates normally.

[0024] 5. The utility model provides a direct drinking water system, in which the concentrated water obtained by filtration of the RO membrane system is discharged through the concentrated water external discharge pipe; the flow on the main road of the concentrated water external discharge pipe detects the concentrated water discharge flow rate, and when the flow detected by the RO concentrated water pressure gauge is too high, the PLC controller controls the RO concentrated water automatic valve on the bypass of the concentrated water external discharge pipe to increase the discharge.

[0025] 6. The utility model provides a direct drinking water system, in which the main return pipe is arranged to prevent the direct drinking water from being at the direct drinking water point on the floor when not in use, causing the direct drinking water to stay for too long and affecting its water quality. When the conductivity of the direct drinking water (the conductivity detected by the third conductivity meter) meets the requirements, the direct drinking water is directly discharged back to the invasive ultraviolet sterilizer through the first return water branch pipe for continuous circulation; when the conductivity of the direct drinking water does not meet the requirements, the direct drinking water is directly discharged back to the original water tank through the second return water branch pipe, and the water is reprocessed and reused.

[0026] 7. The utility model provides a direct drinking water system. When the water flow required after the raw water pump is less than the output of the raw water pump, the PLC controller controls the raw water reflux automatic valve to allow the raw water to reflux.

[0027] 8. The utility model provides a direct drinking water system. When the first conductivity meter on the fourth water pipe detects that the conductivity of the water after RO membrane filtration does not meet the requirements, the PLC controller controls the third automatic control valve and the unqualified return water automatic valve to discharge the water after RO membrane filtration back to the original water tank through the unqualified water pipe, and the water is reprocessed and reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model.

[0029] Among them: 1. Raw water tank; 2. Sand carbon filter; 3. RO membrane system; 4. Invasive ultraviolet sterilizer; 5. Water supply ultraviolet sterilizer; 6. Water supply filter; 7. Raw water pump; 8. High-pressure pump; 9. Water supply pump; 10. Antiscalant adding device; 11. Security filter; 110. First water pipe; 120. Second water pipe; 130. Third water pipe; 140. Fourth water pipe; 150. Fifth water pipe; 160. Sixth water pipe; 170. Seventh water pipe; 180. Main return pipe; 181. First return branch pipe; 182. Second return branch pipe; 190. Concentrated water external discharge pipe; 200. Raw water return pipe; 210. Unqualified water pipe; 310. First pressure gauge; 320. Second pressure gauge; 330. Third pressure gauge; 340. Fourth pressure gauge; 350, the fifth pressure gauge; 360, the sixth pressure gauge; 370, the seventh pressure gauge; 380, the return water pressure gauge; 390, the RO concentrated water pressure gauge; 410, the first automatic valve; 420, the second automatic valve; 430, the third automatic valve; 440, the RO concentrated water automatic valve; 450, the first return water automatic valve; 460, the second return water automatic valve; 470, the raw water return automatic valve; 480, the unqualified return water automatic valve; 510, the first flow meter; 520, the second flow meter; 530, the third flow meter; 540, the RO concentrated water flow meter; 550, the return water flow meter; 610, the return water conductivity meter; 620, the first conductivity meter; 630, the second conductivity meter; 640, the third conductivity meter; 710, the first liquid level sensor; 720, the second liquid level sensor. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the embodiments, but the implementation manner of the present invention is not limited thereto.

[0031] Example 1

[0032] like Figure 1As shown, a direct drinking water system includes a raw water tank 1, a sand carbon filter 2, an RO membrane system 3, an invasive ultraviolet sterilizer 4, a water supply ultraviolet sterilizer 5, a water supply filter 6 and a PLC controller, wherein the raw water tank 1 is connected to a first water pipe 110 and a second water pipe 120, the first water pipe 110 is provided with a first pressure gauge 310 and a first automatic valve 410, the second water pipe 120 is provided with a raw water pump 7, a first flow meter 510 and a second pressure gauge 320, the sand carbon filter 2 is connected to a third water pipe 130, the third water pipe 130 is provided with a third pressure gauge 330, a second automatic valve 420, a high-pressure pump 8 and a fourth pressure gauge 340, the RO membrane system 3 is connected to a fourth water pipe 140, the fourth water pipe 140 is provided with a second flow meter 520 and a third automatic valve 430, the invasive ultraviolet sterilizer 4 is connected to a first water pipe 110 and a second water pipe 120, the first water pipe 110 is provided with a first pressure gauge 310 and a first automatic valve 410, the second water pipe 120 is provided with a raw water pump 7, a first flow meter 510 and a second pressure gauge 320, the sand carbon filter 2 is connected to a third water pipe 130, the third water pipe 130 is provided with a third pressure gauge 330, a second automatic valve 420, a high-pressure pump 8 and a fourth pressure gauge 340, the RO membrane system 3 is connected to a fourth water pipe 140, the fourth water pipe 140 is provided with a second flow meter 520 and a third automatic valve 430, the The water supply ultraviolet sterilizer 5 is connected to the water supply filter 6 through the fifth water pipe 150, and the water supply ultraviolet sterilizer 5 is connected to the water supply filter 6 through the sixth water pipe 160. The sixth water pipe 160 is provided with a water supply pump 9 and a fifth pressure gauge 350. The water supply filter 6 is connected to the direct drinking water point on the floor through the seventh water pipe 170, and the seventh water pipe 170 is provided with a sixth pressure gauge 360 ​​and a third flow meter 530; the PLC controller is connected to the first pressure gauge 310, the first automatic valve 410, the raw water pump 7, the low pressure protector, the first flow meter 510, the second pressure gauge 320, the third pressure gauge 330, the second automatic valve 420, the high pressure pump 8, the fourth pressure gauge 340, the second flow meter 520, the third automatic valve 430, the water supply ultraviolet sterilizer 5, the water supply pump 9, the fifth pressure gauge 350, the sixth pressure gauge 360 ​​and the third flow meter 530.

[0033] The raw water enters the raw water tank 1 through the first water pipe 110, and the first pressure gauge 310 detects the pressure of the raw water. The raw water flows out of the raw water tank 1 and flows into the sand carbon filter 2 through the raw water pump 7. The sand carbon filter 2 removes large particles of impurities. The first flow meter 510 and the second pressure gauge 320 on the second water pipe 120 detect the flow and pressure of the water in the pipe. The third pressure gauge 330 detects the pressure of the water after the sand carbon filter 2 removes impurities. The second pressure gauge 320 and the third pressure gauge 330 on the third water pipe 130 can be compared to determine whether the sand carbon filter 2 is blocked; the fourth pressure gauge 340 detects the pressure of the water after the high-pressure pump 8 pressurizes. The water after the impurities are removed is pressurized and flows into the RO membrane system 3 to remove dissolved salts, colloids, bacteria, viruses, organic matter and other substances harmful to the human body in the water. The water filtered by the RO membrane system 3 flows into the invasive ultraviolet sterilizer 4 through the fourth water pipe 140. The invasive ultraviolet sterilizer 4 removes water. The unfiltered bacteria and viruses are removed from the water, and the second flowmeter 520 on the fourth water pipe 140 detects the water flow in the pipe; the water after the primary sterilization flows into the water supply ultraviolet sterilizer 5 through the fifth water pipe 150 for secondary sterilization, and the water after the secondary sterilization flows into the water supply filter 6 through the sixth water pipe 160 and the water supply pump 9 for further impurity removal, and the fifth pressure gauge 350 on the sixth water pipe 160 detects the pressure of the water after the water supply pump 9 is pressurized; the water filtered by the water supply filter 6 is transported to the direct drinking water point on the floor through the seventh water pipe 170 for direct drinking, and the sixth pressure gauge 360 ​​and the third flowmeter 530 on the seventh water pipe 170 detect the pressure and flow of the direct drinking water; the PLC controller directly controls the valve opening of the first automatic valve 410, the second automatic valve 420 and the third automatic valve 430 and the start and stop of the raw water pump 7, the high-pressure pump 8 and the water supply pump 9 through the PLC controller by collecting the pressure and flow at various places, so that the direct drinking water is automatically controlled.

[0034] Example 2

[0035] The difference between this embodiment and embodiment 1 is that a low-pressure protector is provided on the second water pipe 120, and a high-pressure protector is provided on the fourth water pipe 140. When the water pressure in the second water pipe 120 is lower than the set value, the low-pressure protector transmits a signal to the PLC controller, and the PLC controller stops running the raw water pump 7 to prevent damage to the raw water pump 7; when the water pressure in the fourth water pipe 140 is higher than the set value, the high-pressure protector transmits a signal to the PLC controller, and the PLC controller stops running the high-pressure pump to avoid damage to the three RO membranes of the RO membrane system caused by excessive pressure.

[0036] The first water pipe 110 is also provided with a pulse aeration device, and the seventh water pipe 170 is also provided with a small molecule machine.

[0037] Among them, an antiscalant adding device 10 is also provided between the sand carbon filter 2 and the high-pressure pump 8. A metering pump is provided at the outlet end of the antiscalant adding device 10, and the metering pump is connected to the third water pipe 130. The setting of the antiscalant adding device 10 prevents impurities in the water from scaling in the water pipe and affecting the subsequent system operation.

[0038] The raw water tank 1 and the invasive ultraviolet sterilizer 4 are respectively provided with a first liquid level sensor 710 and a second liquid level sensor 720. The first liquid level sensor 710 and the second liquid level sensor 720 are connected to the PLC controller. The first liquid level sensor 710 and the second liquid level sensor 720 detect the liquid levels of the raw water tank 1 and the invasive ultraviolet sterilizer 4 respectively. The PLC controller cooperates with the automatic control valve and the pump to make the liquid levels of the raw water tank 1 and the invasive ultraviolet sterilizer 4 at the set value, so that the system operates normally.

[0039] A safety filter 11 is also provided in front of the RO membrane system 3. A seventh pressure gauge 370 is provided on the third water pipe 130 at the rear end of the safety filter 11. The seventh pressure gauge 370 is connected to the PLC controller.

[0040] The lower end of the RO membrane system 3 is provided with a brine external discharge pipe 190, on which a RO brine pressure gauge 390, a RO brine automatic valve 440 and a RO brine flow meter 540 are provided. The brine filtered by the RO membrane system 3 is discharged through the brine external discharge pipe 190; the brine discharge flow rate is detected by the flow rate on the main road of the brine external discharge pipe 190. When the flow rate detected by the RO brine pressure gauge 390 is too high, the PLC controller controls the RO brine automatic valve 440 on the bypass of the brine external discharge pipe 190 to increase the discharge. The RO brine pressure gauge 390, the RO brine automatic valve 440 and the RO brine flow meter 540 are connected to the PLC controller.

[0041] Among them, a main return water pipe 180 is arranged behind the direct drinking water point on the floor, and a return water flow meter 550, a return water conductivity meter 610 and a return water pressure gauge 380 are arranged on the main return water pipe 180. The main return water pipe 180 is connected to the first return water branch pipe 181 and the second return water branch pipe 182. The first return water branch pipe 181 is connected to the invasive ultraviolet sterilizer 4, and the second return water branch pipe 182 is connected to the raw water tank 1. The first return water branch pipe 181 is provided with a first return water automatic valve 450, and the second return water branch pipe 182 is provided with a second return water automatic valve 460. The setting of the main water return pipe 180 prevents the drinking water from being in the drinking water point on the floor when not in use, causing the drinking water to stay for too long and affecting its water quality. When the conductivity of the drinking water (the conductivity detected by the third conductivity meter 640) meets the requirements, the drinking water is directly discharged back to the invasive ultraviolet sterilizer 4 through the first water return branch pipe 181 for continuous recycling; when the conductivity of the drinking water does not meet the requirements, the drinking water is directly discharged back to the raw water tank 1 through the second water return branch pipe 182, and the water is reprocessed and used. The return water flow meter 550, the return water conductivity meter 610 and the return water pressure gauge 380 are connected to the PLC controller.

[0042] The second water pipe 120 is connected to the raw water tank 1 through the raw water return pipe 200, and a raw water return automatic valve 470 is provided on the raw water return pipe 200. When the required water flow after the raw water pump 7 is less than the output of the raw water pump 7, the PLC controller controls the raw water return automatic valve 470 to return the raw water. The raw water return automatic valve 470 is connected to the PLC controller.

[0043] The third water pipe 130, the fourth water pipe 140 and the seventh water pipe 170 are respectively provided with a first conductivity meter 620, a second conductivity meter 630 and a third conductivity meter 640. The first conductivity meter 620, the second conductivity meter 630 and the third conductivity meter 640 are connected to a PLC controller.

[0044] The fourth water pipe 140 is connected to the unqualified water pipe 210, and the unqualified water pipe 210 is provided with an unqualified water return automatic valve 480. When the first conductivity meter 620 on the fourth water pipe 140 detects that the conductivity of the water after RO membrane filtration does not meet the requirements, the PLC controller controls the third automatic control valve and the unqualified water return automatic valve 480 to discharge the water after RO membrane filtration back to the original water tank 1 through the unqualified water pipe 210, and the water is reprocessed and used. The unqualified water return automatic valve 480 is connected to the PLC controller.

[0045] There are two invasive ultraviolet sterilizers 4, one for backup and one for use.

[0046] There are two water supply pumps 9, one for backup and one for use.

[0047] When the utility model is used, the first pressure gauge 310 is generally 1.0MPa; the second pressure gauge 320 is generally 1.0MPa; the third pressure gauge 330 is generally 1.0MPa; the fourth pressure gauge 340 is generally 2.5MPa; the fifth pressure gauge 350 is generally 1.0MPa; the sixth pressure gauge 360 ​​is generally 1.0MPa; the seventh pressure gauge 370 is generally 1.0MPa; the return water pressure gauge 380 is generally 1.0MPa; and the RO concentrated water pressure gauge 380 is generally 2.5MPa.

[0048] The production volume of this embodiment is 1m 3 / h, raw water pump 1 adopts CHL2-40, N=0.55KW, AC380V; high pressure pump 8 adopts CDMF1-23, Q=2m 3 / h, H=90m, N=1.5KW, AC380V; water supply pump 9 adopts CDMF5-17, Q=5m 3 / h, H=105m, N=3.0KW, AC380V; the sand carbon filter 2 includes activated carbon filter material and quartz sand, the particle size of the quartz sand is 4-8mm or 1-2mm; the particle size of the activated carbon filter material is 6-16 mesh; the security filter 11 is Φ200×500mm; the nanofiltration membrane in the RO membrane system adopts VNF1-4040; the first flowmeter 510, the second flowmeter 520, the third flowmeter 530, the RO concentrated water flowmeter 540 and the return water flowmeter 550 adopt LDG-SU P-DN32 or LDG-SUP-DN25; the PLC controller adopts DSKZ-020601; the first pressure gauge 310, the second pressure gauge 320, the third pressure gauge 330, the fourth pressure gauge 340, the fifth pressure gauge 350, the sixth pressure gauge 360, the seventh pressure gauge 370, the return water pressure gauge 380 and the RO concentrated water pressure gauge 390 adopt SUP-YC180; the first liquid level sensor 710 and the second liquid level sensor 720 adopt SUP-MP-C-5M-QM.

[0049] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A direct drinking water system, characterized in that: The invention comprises a raw water tank (1), a sand carbon filter (2), an RO membrane system (3), an invasive ultraviolet sterilizer (4), a water supply ultraviolet sterilizer (5), a water supply filter (6) and a PLC controller, wherein the raw water tank (1) is connected to a first water pipe (110) and a second water pipe (120), the first water pipe (110) is provided with a first pressure gauge (310) and a first automatic valve (410), and the second water pipe (120) is provided with a raw water pump (7), a low pressure protector, a first flow rate The sand carbon filter (2) is connected to a third water pipe (130), on which a third pressure gauge (330), a second automatic valve (420), a high-pressure pump (8) and a fourth pressure gauge (340) are provided. The RO membrane system (3) is connected to a fourth water pipe (140), on which a second flow meter (520) and a third automatic valve (430) are provided. The invasive ultraviolet sterilizer (4) The water supply ultraviolet sterilizer (5) is connected to the water supply ultraviolet sterilizer (5) through a fifth water pipe (150), the water supply ultraviolet sterilizer (5) is connected to the water supply filter (6) through a sixth water pipe (160), the sixth water pipe (160) is provided with a water supply pump (9) and a fifth pressure gauge (350), the water supply filter (6) is connected to the direct drinking water point on the floor through a seventh water pipe (170), the seventh water pipe (170) is provided with a sixth pressure gauge (360) and a third flow meter (530); the PLC control The device is connected to the first pressure gauge (310), the first automatic valve (410), the raw water pump (7), the first flow meter (510), the second pressure gauge (320), the third pressure gauge (330), the second automatic valve (420), the high-pressure pump (8), the fourth pressure gauge (340), the second flow meter (520), the third automatic valve (430), the water supply ultraviolet sterilizer (5), the water supply pump (9), the fifth pressure gauge (350), the sixth pressure gauge (360) and the third flow meter (530).

2. A direct drinking water system according to claim 1, characterized in that: The second water pipe (120) is provided with a low-pressure protector, and the fourth water pipe (140) is provided with a high-pressure protector.

3. A direct drinking water system according to claim 1, characterized in that: An antiscalant adding device (10) is also provided between the sand carbon filter (2) and the high-pressure pump (8).

4. A direct drinking water system according to claim 1, characterized in that: The raw water tank (1) and the invasive ultraviolet sterilizer (4) are each provided with a first liquid level sensor (710) and a second liquid level sensor (720).

5. A direct drinking water system according to claim 1, characterized in that: A safety filter (11) is also provided in front of the RO membrane system (3).

6. A direct drinking water system according to claim 1, characterized in that: A concentrate water discharge pipe (190) is provided at the lower end of the RO membrane system (3), and an RO concentrate water pressure gauge (390), an RO concentrate water automatic valve (440) and an RO concentrate water flow meter (540) are provided on the concentrate water discharge pipe (190).

7. A direct drinking water system according to claim 1, characterized in that: A main water return pipe (180) is arranged behind the direct drinking water point on each floor. A water return flow meter (550), a water return conductivity meter (610) and a water return pressure gauge (380) are arranged on the main water return pipe (180). The main water return pipe (180) is connected to a first water return branch pipe (181) and a second water return branch pipe (182). The first water return branch pipe (181) is connected to an invasive ultraviolet sterilizer (4), and the second water return branch pipe (182) is connected to a raw water tank (1). A first water return automatic valve (450) is arranged on the first water return branch pipe (181), and a second water return automatic valve (460) is arranged on the second water return branch pipe (182).

8. A direct drinking water system according to claim 1, characterized in that: The second water pipe (120) is connected to the raw water tank (1) via a raw water return pipe (200), and a raw water return automatic valve (470) is provided on the raw water return pipe (200).

9. A direct drinking water system according to claim 1, characterized in that: The third water pipe (130), the fourth water pipe (140) and the seventh water pipe (170) are respectively provided with a first conductivity meter (620), a second conductivity meter (630) and a third conductivity meter (640).

10. A direct drinking water system according to claim 1, characterized in that: The fourth water pipe (140) is connected to the unqualified water pipe (210), and the unqualified water pipe (210) is provided with an unqualified water return automatic valve (480).

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