TW201510394A - Water purifying system and switching valve used by water purifying system - Google Patents

Abstract

A water purifying system and a switching valve used in the water purifying system are provided, wherein possibility of mixing residual chlorine, microorganisms or red rust into purified water can be decreased. The water purifying system includes: a raw water pipe whereby raw water flows to a water purifying device; a purified water pipe whereby purified water purified by the water purifying device flows to the faucet; and a drain discharging port connected to the raw water pipe at an upstream side of the water purifying device. The water purifying device includes: a filter connected to the raw water pipe; and a water tank connected to a downstream side of the filter for storing the purified water or draining stored purified water in correspondence to a water pressure of the purified water purified by the filter. The switching valve includes: a purified water discharging port for discharging the purified water purified by the filter; and an operating device for switching between a purified water discharging status and a drain discharging status.

Description

Switching valve used in water purification system and water purification system

The present invention relates to a water purification system and a valve used in such a water purification system.

Conventionally, a so-called under sink type water purification system in which a water purifying device is disposed under a sink has been known. In such a tank type water purification system, there is known a method of discharging impurities inside a filter by backwashing to extend the life of the filter.

Fig. 7 is a graph schematically showing the relationship between the instantaneous flow rate (L/min) of the membrane module made of polyethylene (PE) and the cumulative filtration flow rate (L). In FIG. 7, a sample 201 indicates the relationship between the instantaneous flow rate and the cumulative filtration flow rate when the membrane module is not cleaned but is continuously filtered. Sample 203 shows the relationship between the instantaneous flow rate and the cumulative filtration flow rate when the membrane module was backwashed for 1 minute after 30 minutes of filtration. Sample 205 shows the relationship between the instantaneous flow rate and the cumulative filtration flow rate when the membrane module was backwashed for 1 minute after 5 minutes of filtration. As can be seen from Figure 7, the membrane module The higher the cleaning frequency, the more instantaneous traffic can be maintained. Therefore, in the cleaning method by backwashing, it is desirable to increase the cleaning frequency of the filter.

In addition, the cleaning unit described in Patent Document 1 is known as a cleaning unit by backwashing of the tank type water purification system.

[Prior Art Literature]

[Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. Hei 10-9411

The cleaning system described in Patent Document 1 is configured to be switchable between three states in which the user operates the lever of the faucet to discharge the purified water; the hot water is placed in the filter. Backwashing to backwash the filter in a backwash state; and blocking the water supply to the faucet.

However, in the cleaning system described in Patent Document 1, since the unpurified hot water is passed through the purified water flow path, residual chlorine, microorganisms, red rust, or the like may remain in the water purifier or the purified water flow path. And mixed into clean water.

Accordingly, the present invention has been made to solve the above problems, and an object thereof is to provide a water purification system and a faucet used in a water purification system which reduce the possibility of residual chlorine, microorganisms, red rust, and the like mixed into purified water.

In order to solve the problem, the present invention includes: a raw water pipe for flowing raw water to the water purifying device; and a clean water pipe for flowing the purified water purified by the water purifying device to the faucet; And a drainage water outlet connected to the raw water pipe on a further upstream side of the water purification device, the water purification device comprising: a filter coupled to the raw water pipe; and a water tank coupled to a downstream side of the filter Corresponding to the water pressure of the purified water purified by the filter to store the purified water or discharge the stored purified water, the faucet comprising: a purified water discharge port, by the filter The purified purified water is discharged; and the operating device is configured to switch between the following water discharge state and the drainage water discharge state, that is, 1) the purified water discharge state, and the clean water discharge port and the clean water pipe are connected And storing the purified water in the water tank while discharging water from the clean water drain; and 2) draining and discharging the water, closing the clean water drain, and further draining the drain drain The raw water pipe is connected to the drainage water discharge port, and the purified water stored in the water tank flows through the filter and the raw water pipe to the drainage water discharge port, and drains from the drainage water discharge port.

According to the present invention configured as described above, the raw water is discharged to the water purifying device by operating the faucet, and the purified water is discharged from the clean water discharge port. Moreover, in the state of the purified water discharge, the purified water that has passed through the filter flows to the clean water pipe or the water tank. Therefore, in the state of the purified water discharge, the purified water can be drained from the clean water discharge port and stored in the water tank. Further, in the drain water discharge state, since the purified water discharge port is closed, the purified water in the water tank flows backward in the filter. Thereby, the filter can be subjected to so-called backwashing.

Thus, according to the present invention, the filter can be cleaned using the purified water stored in the water tank. Thus, it is possible to provide a water purification system that reduces the possibility of mixing microorganisms or red rust into the purified water, and a faucet used in the water purification system. And by setting the faucet The filter can be backwashed for draining water. Moreover, according to the present invention, the drain that has been backwashed can be discharged without passing through the clean water pipe. Thereby, the possibility of mixing residual chlorine, microorganisms, red rust, etc. into the purified water can be reduced.

In the above case, preferably, the raw water pipe includes a first raw water pipe and a second raw water pipe, the first raw water pipe flows raw water to the faucet, and the second raw water pipe makes raw water from the raw water The faucet flows to the water purifying device, and the faucet is provided with the drain water drain.

With such a configuration, a water purification water outlet, a drain water discharge port, and an operating device are provided in the faucet. Therefore, the water removal by the purified water purified by the water purifying device, the confirmation of the backwashing state of the filter, the switching operation of the purified water discharge state and the drainage water discharge state can be performed.

In this case, it is preferable that the operating device switches between the clean water discharge state and the water stop state of the clean water discharge port, and the water stop state is the drain water discharge state.

With such a configuration, the filter can be backwashed by setting the drain water discharge state, and then the water discharge is automatically stopped. Thus, according to the present invention, the water discharge from the purified water discharge port can be stopped without performing a special operation, whereby the filter can be automatically backwashed. Thereby, the frequency of the backwashing can be increased without special operations, thereby maintaining the water purification performance of the filter.

Further, preferably, the water purifying device has a first filter and a second filter, the first filter is coupled to the raw water pipe, and the second filter is coupled to the first pipe via a connecting pipe a downstream side of a filter, the connecting tube is also connected to The water tank.

With such a configuration, in the clean water discharge state, the purified water that has passed through the first filter flows to the connecting pipe and flows from the connecting pipe to the second filter or the water tank. Further, when the purified water passes through the second filter, a predetermined pressure loss occurs, so that the water pressure in the connecting pipe rises. Further, when the water pressure in the connecting pipe rises, the purified water starts to flow in the direction of the water tank in addition to the direction of flowing to the second filter. Thus, the purified water is diverted toward the water tank and the second filter. Thereby, the purified water is stored in the water tank. Further, in the drain water discharge state, since the purified water discharge port is closed, the purified water in the water tank flows in a direction in which the water pressure is low, that is, flows to the open drain water discharge port. When the purified water in the water tank flows to the drain water discharge port, the purified water flows back through the first filter through the connecting pipe. Thereby, the so-called backwashing of the first filter can be performed. Further, the drain that has cleaned the first filter is discharged from the drain drain. Also, when there is no clean water in the water tank, the drainage from the drain drain will stop. Thereby, the water discharge from the clean water discharge port and the drain water discharge port is stopped, and the faucet becomes a water stop state. Thus, according to the present invention, the pressure loss of the second filter can be utilized to store the purified water into the water tank. Further, it is possible to backwash the first filter which is most likely to adhere to dirt such as turbidity in the raw water by using the purified water stored in the water tank.

Moreover, preferably, the water tank is an accumulator.

Moreover, it is preferable that the accumulator is provided with a rubber bag inside.

Moreover, preferably, the water inlet of the water tank is opened downward.

Moreover, preferably, the first filter is provided with any one of a microfiltration membrane, an ultrafiltration membrane, or a nanofiltration membrane.

With such a configuration, the first filter can be used to supplement the turbidity in the raw water. Therefore, the filtration performance of the filter in the latter stage can be maintained. Further, the microfiltration membrane, the ultrafiltration membrane, and the nanofiltration membrane which are easily clogged can be backwashed.

Moreover, it is preferable that the first filter is provided with any one of an ion exchange resin or activated carbon.

Moreover, it is preferable that the second filter is provided with any one of an ion exchange resin or activated carbon.

Moreover, it is preferable that the capacity of the water tank is 2 to 3 times the amount of water retention of the first filter.

Moreover, in order to solve the problem, the present invention comprises: a fixed disk having: a first hole capable of communicating with a first raw water pipe for flowing raw water to the faucet; and a second hole capable of flowing with the faucet a second raw water pipe connected to the water purifying device; and a third hole communicating with the clean water pipe and the purified water discharge port, the clean water pipe flowing the purified water purified by the water purifying device to the faucet The clean water drain is connected to a downstream side of the clean water pipe; and a movable disk is rotatably disposed on the fixed disk and has a movable hole, wherein the movable disk is Rotating on the fixed disc, so that the following two states can be switched, that is, 1) a water purification state, by connecting the movable hole with the third hole, thereby making the clean water pipe and the a clean water discharge port for draining water from the clean water discharge port; and 2) a drain water discharge state, the movable plate is used to block the first hole and the third hole, and the second hole is opened Thereby passing water through the water purifying device and the second raw water pipe, Flowing raw water pipe connected to the second drain more upstream drainage port, And draining from the drainage drain.

According to this configuration, the drain that has been subjected to the backwashing can be discharged without passing through the clean water pipe. Thereby, the possibility of mixing residual chlorine, microorganisms, red rust, etc. into the purified water can be reduced.

As described above, according to the present invention, it is possible to provide a water purification system that reduces the possibility of residual chlorine, microorganisms, red rust, etc., which are mixed into clean water, and a faucet used in the water purification system.

1‧‧‧Water purification system

3‧‧‧Water purification device

5‧‧‧Special tap

5a‧‧‧Pole

7‧‧‧First raw water pipe

9‧‧‧Second raw water pipe

11‧‧‧Clean water pipes

13‧‧‧ raw water inlet

15‧‧‧ hot water inlet

17‧‧‧Ordinary faucet

19‧‧ ‧ water plug

21‧‧‧Clean water drain

23‧‧‧Draining drain

25‧‧‧Switching structure (switching valve)

27‧‧‧ movable disc

29‧‧‧Fixed disc

31‧‧‧ movable holes

33‧‧‧ first hole

35‧‧‧ second hole

37‧‧‧ third hole

39‧‧‧Prefilter (first filter)

41‧‧‧Adsorption filter (second filter)

43‧‧‧Hollow fiber membrane filter

45, 55‧‧‧ hollow fiber membrane

47‧‧‧First connecting tube

49‧‧‧ potting materials

51‧‧‧Adsorption cartridge

53‧‧‧Second connection tube

57‧‧‧Water tank

59‧‧‧Rubber bags

101‧‧‧Top cover

103‧‧‧Cylindrical container

105‧‧‧ Cover

107‧‧‧Water purification pipe

Samples of 201, 203, 205‧ ‧

A, B‧‧ arrows

Fig. 1 is a schematic view showing a water purifying system according to an embodiment of the present invention.

Fig. 2 is a schematic view showing a dedicated faucet according to an embodiment of the present invention.

Fig. 3 is a schematic view showing a dedicated faucet according to an embodiment of the present invention.

Fig. 4 is a perspective view showing a configuration of a water purifying device according to an embodiment of the present invention.

Fig. 5 is a perspective view showing a configuration of a water purifying device according to an embodiment of the present invention.

Fig. 6 is a schematic view showing a configuration of a water purifying device according to an embodiment of the present invention.

Fig. 7 is a graph schematically showing the relationship between the instantaneous flow rate (L/min) of the membrane module made of PE and the cumulative filtration flow rate (L).

Hereinafter, a water purification system according to an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a schematic view showing a water purifying system according to an embodiment of the present invention. The water purification system described here always applies water pressure in the water purification system.

As shown in Fig. 1, the water purification system 1 includes a raw water inlet 13 for introducing raw water into the water purification system 1, a water purification device 3 for purifying the raw water, and a dedicated faucet 5 for purifying Water is drained. Further, the water purifying device 3 and the dedicated faucet 5 are connected to the two raw water pipes that flow the raw water to the water purifying device 3. The raw water pipe includes: a first raw water pipe 7 for flowing raw water to the dedicated faucet 5; and a second raw water pipe 9 for flowing raw water from the dedicated faucet 5 to the water purifying device 3. Further, the water purifying device 3 and the dedicated faucet 5 are connected to the clean water pipe 11 for allowing the water purified by the water purifying device 3 to flow to the dedicated faucet 5.

The raw water inlet 13 is connected to the ordinary faucet 17, and is connected to the dedicated faucet 5 via the first raw water pipe 7, and the ordinary faucet 17 is used to directly discharge the raw water without purification. A water splitting plug 19 is provided between the raw water inlet 13 and the ordinary faucet 17 and between the raw water inlet 13 and the dedicated faucet 5. The raw water flowing into the water purification system 1 from the raw water inlet 13 flows to the open faucet via the water splitter 19. In other words, in the water purification system 1 of the present embodiment, since the raw water is always supplied from the raw water inlet 13 to the water purification system, the water pressure is always applied to the water purification system 1. Further, the ordinary faucet 17 is also connected to the hot water inlet 15 for allowing hot water to flow into the ordinary faucet to directly discharge the hot water flowing into the water purification system 1 without purification.

The first raw water pipe 7 extends between the water splitting plug 19 and the dedicated faucet 5, and is configured to flow the raw water flowing into the water purification system 1 from the raw water inlet 13 via the water splitting plug 19 to the dedicated faucet 5. Further, the second raw water pipe 9 extends between the dedicated faucet 5 and the water purifying device 3, and the outlet of the second raw water pipe 9 is connected to the inlet of the water purifying device 3. The second raw water pipe 9 is configured to make water in the dedicated faucet 5 and the water purifying device 3 Flow between. Further, the clean water pipe 11 extends between the water purifying device 3 and the dedicated faucet 5, and is configured to flow the water purified by the water purifying device 3 to the dedicated faucet 5.

2 and 3 are schematic views showing a dedicated faucet. The dedicated faucet 5 includes a water purification water discharge port 21 for discharging water purified by the water purification device 3, and a drainage water discharge port 23 for discharging water to the drainage water used for cleaning the water purification device 3 by a method described later. Further, the dedicated faucet 5 has a switching valve 25 formed by superposing two discs. The switching valve 25 is configured to rotate the movable disk 27 with respect to the fixed disk 29 in response to the operation of the lever 5a disposed in the dedicated faucet 5, thereby opening and closing the water purification water outlet 21 and the drainage water discharge port 23. .

The switching valve 25 is formed by overlapping the movable disk 27 in a concentric shape on a disk-shaped fixed disk 29 in which three holes are formed, and the movable disk 27 has a crescent shape and is formed with 1 A movable hole 31. Of the three holes of the fixed disk 29, the first hole 33 and the second hole 35 are arranged close to each other, and only the third holes 37 are arranged to be spaced apart. The movable disk 27 has a crescent shape in which a region in which the first hole 33 and the second hole 35 are formed is cut out from a disk having the same shape as the fixed disk 29. Further, the movable disk 27 rotates around the axis of the fixed disk 29 and the movable disk 27 in response to the user's operation on the lever 5a, whereby the movable hole 31 is rotationally moved about the axis with respect to the fixed disk 29. A stopper (not shown) is attached to the lever 5a, and the lever 5a is stopped at a fixed position by the stopper, thereby switching the dedicated faucet between the purified water discharge state and the drain discharge state. The water-releasing state refers to a state in which, as shown in FIG. 2, the drain water discharge port 23 is closed, so that the first hole 33 and the second hole 35 are exposed from the notch of the movable disk, and the third hole 37 and the movable hole 31 are given. Connected shape The state in which the first hole 33, the second hole 35, and the third hole 37 are opened, and the water purification water discharge port 21 is open. Further, the drain water discharge state refers to a state in which the first hole 33 and the third hole 37 are closed by the movable disk 27 as shown in FIG. 3, and the movable hole 31 is closed by the fixed disk 29, and only the first The two holes 35 are open, and the drain water discharge port 23 is open.

Next, the structure of the switching structure 25 will be described in more detail. First, the state of the purified water discharge shown in Fig. 2 will be described in detail. As shown in FIG. 2, the movable disk 27 is placed on the fixed disk 29 so that the movable hole 31 of the movable disk 27 communicates with the third hole 37 of the fixed disk 29 in the water-purifying state.

The first hole 33 of the fixed disk 29 is in communication with the first raw water pipe 7. Therefore, in a state where the first hole 33 is opened, the inlet from the first raw water pipe 7 toward the dedicated faucet 5 is opened, and the raw water flows into the dedicated faucet 5 from the first raw water pipe 7. Moreover, the second hole 35 of the fixed dish 29 communicates with the second raw water pipe 9 without being in communication with the drain water discharge port 23. Thus, the water in the first raw water pipe 7 flows to the second raw water pipe 9. Further, the third hole 37 and the movable hole 31 of the movable plate 27 communicate with the clean water pipe 11 and the water purification water discharge port 21. Therefore, in a state where the third hole 37 communicates with the movable hole 31, the purified water in the clean water pipe 11 flows to the purified water discharge port 21.

Next, the state of the drainage water discharge shown in Fig. 3 will be described in detail. As shown in Fig. 3, in the drain water discharge state, the first hole 33 and the third hole 37 of the fixed disk 29 are closed by the movable disk 27, and the movable hole 31 of the movable disk 27 is closed by the fixed disk 27. Further, the movable disk 27 is placed on the fixed disk 29 such that the second hole 35 of the fixed disk 29 communicates with the drain water discharge port.

In this state, the first hole 33 of the fixed disk 29 is closed by the movable disk 27. Therefore, the inlet from the first raw water pipe 7 toward the dedicated faucet 5 is closed, and the raw water does not flow into the dedicated faucet 5 from the first raw water pipe 7. Further, the second hole 35 of the fixed disk 29 communicates with the second raw water pipe 9 to be in communication with the drain water discharge port 23. Therefore, the drain for cleaning the water purifying device 3, which will be described later, flows from the second raw water pipe 9 to the drain water discharge port 23. Moreover, the third hole 37 of the fixed disk 29 is closed by the movable disk 27. Further, the movable hole 31 of the movable plate 27 is closed by the fixed disk 29. Therefore, the purified water in the clean water pipe 11 does not flow into the dedicated faucet 5.

4 is a perspective view showing a configuration of a water purifying device, FIG. 5 is a perspective view showing a modified example of the water purifying device, and FIG. 6 is a schematic view showing a configuration of the water purifying device. As shown in FIGS. 4 and 6, the water purifying device 3 is formed by connecting three filters in series. The filter located on the most upstream side of the water purifying device 3 is a so-called pre filter 39 (first filter) that replenishes the turbidity contained in the raw water. On the downstream side of the prefilter 39, an adsorption filter 41 (second filter) including an adsorbent is connected, and a hollow fiber membrane filter 43 having a hollow fiber membrane inside is connected to the downstream side of the adsorption filter 41.

The prefilter 39 includes a header 101 coupled to the second raw water pipe 9 and a cylindrical container 103 detachably attached to the top cover 101.

The top cover 101 is configured such that water entering and leaving the cylindrical container 103 passes through the inside of the top cover 101. The top cover 101 is connected to the dedicated faucet 5 via the second raw water pipe 9 on the upstream side of the prefilter 39, and is connected to the adsorption filter cartridge 41 via the first connection pipe 47 on the downstream side.

Inside the cylindrical container 103, a hollow fiber membrane 45 is accommodated. Further, the prefilter 39 is provided with a cap 105 which is attached to the open end of the cylindrical container 103 and is connectable to the top cover 101. The cover 105 allows the raw water flowing into the top cover 103 from the second raw water pipe 9 to flow into the radial direction of the cylindrical container 103 as indicated by an arrow A. Further, a clean water outlet pipe 107 extending in the vertical direction is provided at the center of the cover 105. The purified water outlet pipe 107 causes the purified water to flow to the top cover 101 as indicated by an arrow B. Further, the purified water flowing from the clean water outlet pipe 107 to the top cover 101 flows to the first connecting pipe 47.

The hollow fiber membrane 45 in the prefilter 39 is bent into a U shape, and both ends thereof are held by a potting material 49. Further, by bending a plurality of hollow fiber membranes into a U shape and fixing the ends thereof to the potting material 49, the plurality of hollow fiber membranes constitute a columnar body. As the hollow fiber membrane 45, for example, it is preferable to use various materials such as cellulose (polycarbonate), polyolefin (polyethylene), polypropylene, and polyethylene. Polyvinyl alcohol, ethylene vinyl alcohol copolymer, polyether, poly Methyl Methacrylate (PMMA), polysulfone, polyacrylonitrile Polyacrylonitrile, polyvinylidene (Teflon), polycarbonate, polyester, polyamide, aromatic Amine system. Among these materials, a polyolefin-based hollow fiber membrane such as polyethylene or polypropylene is preferably used in consideration of film stretching, bending resistance, cleaning property, workability, and chemical resistance. Further, in consideration of workability and the like, a polyethylene-based hollow fiber membrane is preferably used.

Further, in the inside of the cylindrical container 103, a powdery or granular adsorbent (activated carbon, zeolite, molecular sieve, ion exchange resin, or the like) or a fibrous adsorbent may be filled instead of the hollow fiber membrane 45. (fibrous activated carbon) and the like. Among these materials, it is particularly preferable to use an ion exchange resin or activated carbon in consideration of adsorptivity and the like. The hollow fiber membrane 45 and the adsorbent material may be used in combination to maintain the filtration performance of the hollow fiber membrane 45.

The adsorption filter 41 is provided with an adsorption filter cartridge 51 therein. Then, the water that has flowed into the adsorption filter 41 from the pre-filter 39 through the first connection pipe 47 is filtered by the adsorption filter cartridge 51, and is discharged from the adsorption filter 41. Further, the purified water discharged from the adsorption filter 41 flows through the second connecting pipe 53 to the hollow fiber membrane filter 43.

Examples of the adsorption filter cartridge 51 include a powdery or granular adsorbent (activated carbon, zeolite, molecular sieve, ion exchange resin, etc.), a fibrous adsorbent (fibrous activated carbon), and the like.

Among these materials, it is particularly preferable to use an ion exchange resin or activated carbon in consideration of adsorptivity and the like.

The hollow fiber membrane filter 43 is a bundle including a hollow fiber membrane 55 inside, similarly to the prefilter 39. Preferably, the hollow fiber membrane 55 of the hollow fiber membrane filter 43 has a pore diameter smaller than that of the hollow fiber membrane 45 of the prefilter 39. Thereby, relatively large turbidity can be supplemented by the prefilter 39, and relatively small turbidity is supplemented by the hollow fiber membrane filter 43. The outlet of the hollow fiber membrane filter 43 is connected to the clean water pipe 11, and the purified water purified by the hollow fiber membrane filter 43 flows to the clean water pipe 11.

Further, the first connecting pipe 47 is coupled to the water tank 57 and is purified by the prefilter 39 The cleaned water flows to the water tank 57 corresponding to the pressure in the first connecting pipe 47, and is stored in the water tank 57. The water tank includes, for example, an accumulator having a rubber bag 59 therein, that is, a diaphragm type accumulator. When the water pressure in the first connecting pipe 47 is high, the purified water in the first connecting pipe 47 flows into the water tank 57, and is stored in the water tank 57 while expanding the rubber bag 59. When the water pressure in the first connecting pipe 47 is high, it means that the purified water purified by the prefilter 39 flows to the adsorption filter 41. In other words, when the purified water flows into the adsorption filter 41, a predetermined pressure loss occurs due to the adsorption of the filter 41, and thus the pressure in the first connection pipe 47 gradually increases. Further, when the water pressure in the first connecting pipe 47 reaches a certain level or more, that is, exceeds the contraction force of the rubber bag 59 in the water tank 57, the rubber bag 59 in the water tank 57 starts to expand due to the water pressure. Thereby, the purified water can be stored in the water tank 57. When the pressure in the first connecting pipe 47 is low, the water tank 57 sends the purified water stored in the water tank 57 to the first connecting pipe by the contraction force of the rubber bag 59 and the air pressure in the water tank 57. .

As a direction in which the water tank 57 is connected to the first connecting pipe 47, as shown in Fig. 4, the water inlet of the water tank 57 faces downward, and as shown in Fig. 5, the water inlet of the water tank 57 faces upward. When the water tank 57 is disposed such that the water inlet of the water tank 57 is connected upward, that is, the water inlet is opened downward, the air in the water tank 57 is accumulated in the upper portion, and the pressure is not discharged when the pressure is lowered. . Therefore, as the water pressure increases, the internal air contracts, and when the water pressure is released, the internal air expands to supply water into the first connecting pipe. Therefore, the rubber bag 59 may not be provided in the water tank 57. Further, in the present embodiment, the water tank 57 is coupled to the first connecting pipe 47, but the water tank 57 may be directly coupled to the top cover 101.

The capacity of the water tank 57 can be appropriately selected in accordance with the amount of water retention of the prefilter 39. Preferably, the capacity of the water tank 57 is set to 2 to 3 times with respect to the amount of water retention of the prefilter 39. At this time, it is possible to store the purified water in an amount sufficient to clean the film. For example, when the amount of water retention of the prefilter 39 is 400 cc, it is preferable to set the capacity of the water tank 57 to 800 cc to 1200 cc.

Next, the action of the water purification system according to the embodiment of the present invention will be described.

The action in the state of the purified water discharged from the dedicated faucet 5 to release the purified water will be described in detail. In the case where the purified water is discharged from the purified water discharge port 21 of the dedicated faucet 5, the user operates the lever to the clean water position. By this operation, the movable disk 27 is rotated, and the movable disk 27 closes the drain water discharge port 23, and the first hole 33, the second hole 35, the third hole 37, the movable hole 31, and the water purification water outlet are opened. . Thereby, the raw water flowing into the water purification system 1 from the raw water inlet 13 flows through the first raw water pipe 7 to the dedicated faucet 5, flows into the dedicated faucet 5 through the first hole 33, and flows through the second hole 35 to the second raw water pipe. 9, and flows through the second raw water pipe 9 to the water purifying device 3. Further, the raw water flowing into the water purifying device 3 is purified by the prefilter 39 of the water purifying device 3. Further, the water purified by the prefilter 39 flows to the first connecting pipe 47. The purified water in the first connecting pipe 47 gradually flows into the adsorption filter 41, but the amount of purified water flowing out of the prefilter 39 is larger than the amount flowing into the adsorption filter 41. Therefore, the water pressure in the first connecting pipe 47 gradually increases. When the water pressure in the first connecting pipe 47 reaches a certain level or more, the purified water in the first connecting pipe 47 overcomes the contraction force of the rubber bag 59 and the air pressure in the water tank 57 to expand the rubber bag 59 and store it in the water tank. 57 inside.

On the other hand, the purified water that has flowed into the adsorption filter 41 is purified by the adsorption filter cartridge 51 and then flows to the second connection pipe 53. Then, the purified water flowing to the second connecting pipe 53 flows through the second connecting pipe 53 to the hollow fiber membrane filter 43. Then, the purified water that has passed through the hollow fiber membrane filter 43 flows through the clean water pipe 11 to the dedicated faucet 5. The purified water that has flowed into the dedicated faucet 5 flows through the third hole 37 of the fixed disk 29 and the movable hole 31 of the movable disk 27 to the clean water discharge port 21, and is discharged from the clean water discharge port 21.

Further, when the clean water discharge state is maintained, the purified water flowing into the first connecting pipe 47 from the prefilter 39 flows into the water tank 57, and when the water tank 57 is filled with the purified water, the purified water stops flowing into the water tank 57. Further, the purified water that has passed through the prefilter 39 continues to flow to the adsorption filter 41 on the downstream side. In addition to the state in which the purified water is discharged from the dedicated faucet 5 while storing the purified water in the water tank 57, the state of the "purge water discharge state" includes the following state, that is, although the water tank 57 is cleaned. The water is filled and the purified water does not flow into the water tank 57. However, the water purified by the prefilter 39, the adsorption filter 41, and the hollow fiber membrane filter 43 is still discharged from the dedicated faucet 5.

Next, the action of the drainable pre-filter 39 in the state of draining and discharging water will be described in detail. At this time, in a state where the water is stored in the water tank 57, the user operates the lever to the water stop position. By this operation, the movable disk 27 is rotated to set the state in which the movable plate 27 closes the first hole 33, the third hole 37, the movable hole 31, and the water purification water outlet, and the second hole 35 and the drain water discharge port 23 are opened. . Thereby, the second raw water pipe 9, the second hole 35, and the drain water discharge port 23 are in a communicating state. The water purification system also applies water pressure when not in use, so when the drainage water outlet 23 is opened, the water purification system 1 The water flows to the drain drain 23 . Thereby, the water pressure in the prefilter 39 and the water pressure in the first connecting pipe 47 also decrease. When the water pressure in the first connecting pipe 47 is lowered, the purified water in the rubber bag 59 is pressure-fed to the first connecting pipe 47 by the contraction force of the rubber bag 59 in the water tank 57 and the air pressure in the water tank 57. Inside. At this time, since the third hole 37 of the fixed disk 29 is blocked by the movable disk 27, the purified water that is pressure-fed to the first connecting pipe 47 does not flow to the downstream side but flows to the upstream side where the pressure is low. When the purified water in the first connecting pipe 47 flows into the prefilter from the outlet side of the prefilter 39, the purified water flows in the prefilter 39 in the opposite direction to the filtering. Therefore, the purified water is discharged to the surface of the hollow fiber membrane through the inside of the hollow fiber membrane. Thereby, the turbidity adhering to the surface of the hollow fiber membrane can be removed. Thereby, the pre-filter 39 can be backwashed. Further, the water backwashed by the prefilter 39 flows back to the dedicated water tap 5 in the second raw water pipe 9. Then, the water that has flowed into the dedicated faucet 5 flows through the second hole 35 to the drain water discharge port 23, and is discharged as drainage from the drain water discharge port 23. Further, when the purified water in the water tank 57 becomes empty, the backwashing of the prefilter 39 is automatically ended. At this time, since the first hole 33 of the fixed disk 29 is clogged, the raw water does not flow into the dedicated faucet 5, and the water after the pre-filter 39 is washed is discharged, and the dedicated faucet 5 is in a water stop state.

As described above, according to the water purification system of the present embodiment, the purified water can be stored in the water tank 57 in the state of the purified water discharge, and the purified water stored in the water tank 57 can be used in the drain water discharge state. The filter 39 performs backwashing. Thereby, the possibility that microorganisms or red rust are mixed into the purified water is lowered. Moreover, when the user does not particularly intend to set the dedicated faucet 5 to the water state, it may be The prefilter 39 is backwashed. Further, the cleaning of the prefilter 39 is automatically performed every time the water state (drainage water discharge state) is changed until the self-purifying water discharge state is switched. Thereby, the water purification performance of the prefilter 39 can be maintained. Further, since the cleaning of the prefilter 39 is automatically completed when there is no water in the water tank 57, it is possible to surely prevent the phenomenon that the water is forgotten when the backwashing is performed. Further, by increasing the cleaning frequency of the prefilter 39 and maintaining the water purification performance of the prefilter 39, the life of the filters 41, 43 on the downstream side of the prefilter 39 can be extended.

Moreover, according to the water purifying system of the present embodiment, since the drain water discharge port is provided independently of the other water discharge ports, it is possible to prevent the user from drinking the drain water by mistake.

Furthermore, the present invention is not limited to the above embodiment, but each configuration of the washing system of the above embodiment can be appropriately changed.

Further, in the above-described embodiment, the user operates the shift lever 5a to the water stop position, and then enters the water stop state after passing through the drain water discharge state, but the drain water discharge position may be provided independently of the water stop position. At this time, the movable disk and the fixed disk are set to the state of FIG. 3 by operating the lever 5a to the drain water discharge position. Further, by operating the lever 5a to the water stop position, the first hole 33, the second hole 35, and the third hole 37 can be closed by the movable disk 27, and the movable hole 31 can be closed by fixing the disk 29. status. At the water stop position, the second raw water pipe and the drain water discharge port 23 are not connected, so that the intrusion of foreign matter or the contamination of microorganisms can be prevented.

Moreover, in the above embodiment, the dedicated faucet is independently provided with the purified water drain and the drain drain, but it is not necessary to distinguish the drain according to the nature of the discharged water, and the clean water drain and the drain drain can be set to one. Water drain. At this time, at A drain water discharge pipe that communicates with the purified water discharge port is disposed on the movable plate 27. In the drain water discharge state, the second hole 35 of the fixed dish 29 communicates with the drain water discharge pipe, and the water is drained from the clean water discharge port after the prefilter 39 is cleaned.

Further, in the above-described embodiment, the water purification water outlet and the water discharge water outlet are directly connected to the water purification pipe and the raw water pipe, but may be connected via a pipe or the like. In this case, the pipe connected to the water purification water outlet and the drainage water discharge port is connected. Open and close by a movable disc.

Further, in the above embodiment, a plurality of filters (adsorption filter 39 and hollow fiber membrane filter 41) are connected downstream of the prefilter, but a plurality of filters may not be provided downstream. In this case, it is only necessary to provide a valve or the like so that the water pressure of the connecting pipe becomes high in the state in which the water is released, so that the purified water flows to the water tank.

Further, in the above-described embodiment, the purified water in the first connecting pipe 47 is stored in the rubber bag 59, but may be stored in the water tank 57. At this time, an air bag type accumulator is used, and the air bag type accumulator is provided with a rubber bag in which air, nitrogen, or the like is sealed in a lower portion of the water tank 57. When the water pressure in the first connecting pipe 47 is high, the purified water in the first connecting pipe 47 is stored in the water tank 57 while shrinking the rubber bag. Further, when the pressure in the first connecting pipe 47 is low, the purified water stored in the water tank 57 is pressure-fed into the first connecting pipe by the expansion force of the rubber bag.

Further, in the above embodiment, the movable disk has a crescent-shaped notch portion, but it does not need to have a crescent shape. It suffices that the first hole 33 and the second hole 35 of the fixed disk are communicated with each other, and the second hole 35 of the fixed disk is communicated with the drain water discharge port 23.

In the above embodiment, the "upstream side" and the "downstream side" are It means the direction in which the raw water inlet is the most upstream and the water discharge port is the most downstream. Therefore, when the purified water is discharged, the water flows from the upstream side to the downstream side, and when the backwashing is performed, the water flows from the downstream side to the upstream side.

Further, the "upper side" and "lower side" refer to the direction in the direction of gravity, and the side of the top cover 101 is referred to as the upper side, and the side of the bottom wall of the cylindrical container 103 is referred to as the lower side.

Hereinafter, embodiments of the invention will be described.

In an embodiment, two filters having a water retention of 400 cc are prepared, Some filters are connected between the water tanks that do not have rubber bags inside. The water tank is connected between the filters with its water inlet facing downward. The water tank has a capacity of 1200 cc. From the upstream side of the filter, the raw water is allowed to flow for 1 minute under a predetermined pressure, and the purified water is stored in the water tank, and the raw water is purified by two filters to obtain purified water and then discharged. Subsequently, the drain of the purified water and the inlet of the raw water are simultaneously blocked. Then, the drain water is discharged through the filter on the upstream side. The relationship between the pressure at the time of entering the raw water into the water, the flow rate of the purified water, and the amount of the discharged water is shown in Table 1.

As can be seen from Table 1, the amount of water discharged from the drain, that is, the amount of purified water that can be stored in the water tank, increases in accordance with the pressure at which the raw water enters the water and the flow rate of the purified water. because On the other hand, according to the present embodiment, by increasing the pressure at which the raw water enters the water and the flow rate of the purified water, the amount of water stored in the water tank can be increased, whereby the amount of the washing water available for backwashing is increased.

21‧‧‧Clean water drain

23‧‧‧Draining drain

25‧‧‧Switching structure (switching valve)

27‧‧‧ movable disc

29‧‧‧Fixed disc

31‧‧‧ movable holes

33‧‧‧ first hole

35‧‧‧ second hole

37‧‧‧ third hole

Claims (12)

A water purification system comprising: a raw water pipe to flow raw water to a water purification device; a clean water pipe to cause purified water purified by the water purification device to flow to a faucet; and a drainage water discharge port in which the water purification device is further The upstream side is coupled to the raw water pipe, the water purifying device includes: a filter coupled to the raw water pipe; and a water tank coupled to a downstream side of the filter, corresponding to the purified by the filter a water pressure of the purified water for storing the purified water or discharging the stored purified water, the faucet comprising: a purified water drain, draining the purified water purified by the filter; and an operating device, The utility model relates to switching the following water-purifying water discharge state and the drainage water discharge state, that is, 1) the purified water discharge state, connecting the clean water discharge port and the clean water pipe, and storing the purified water in the water tank And discharging water from the clean water discharge port; and 2) draining the water discharge state, closing the clean water discharge port, and placing the raw water pipe on the downstream side of the drainage water discharge port and the drainage water discharge port Linked to be stored in the water tank The purified water flows through the filter and the raw water pipe to the drainage water discharge port, and drains from the drainage water discharge port. The water purification system of claim 1, wherein the raw water pipe comprises a first raw water pipe and a second raw water pipe, the first raw water pipe flowing raw water to the faucet, the second raw water pipe Raw water is caused to flow from the faucet to the water purifying device, and the faucet is provided with the drainage water discharge port. The water purification system according to the first or second aspect of the invention, wherein the operating device is capable of switching between the water purification state and the water shutoff state of the water purification outlet, the water stop state The water is discharged for the drainage. The water purification system according to any one of claims 1 to 3, wherein the water purifying device has a first filter and a second filter, the first filter being coupled to the original In the water pipe, the second filter is coupled to a downstream side of the first filter via a connecting pipe, and the connecting pipe is also coupled to the water tank. The water purification system according to any one of claims 1 to 4, wherein the water tank is an accumulator. The water purification system according to claim 5, wherein the accumulator is provided with a rubber bag inside. The water purification system according to any one of claims 1 to 4, wherein the water inlet of the water tank is open downward. The water purification system according to any one of claims 4 to 7, wherein the first filter is provided with any one of a microfiltration membrane, an ultrafiltration membrane, or a nanofiltration membrane. The water purification system according to any one of claims 4 to 8, wherein the first filter is provided with any one of an ion exchange resin or activated carbon. The water purification system according to any one of claims 4 to 9, wherein the second filter is provided with any one of an ion exchange resin or activated carbon. The water purification system according to any one of the preceding claims, wherein the capacity of the water tank is 2 times to 3 times that of the first filter. Times. A switching valve comprising: a fixed disc having: a first hole communicating with a first raw water pipe for flowing raw water to a faucet; and a second hole capable of communicating with a second raw water pipe flowing from the faucet to a water purifying device And a third hole communicating with the clean water pipe and the purified water discharge port, wherein the clean water pipe causes the purified water purified by the water purifying device to flow to the faucet, and the clean water drain port is connected to the water pipe a downstream side of the clean water pipe; and a movable disc rotatably disposed on the fixed disc and having a movable hole, the switching valve being switchable by rotating the movable disc on the fixed disc The following two states, namely: 1) a water purification state, by connecting the movable hole to the third hole, thereby connecting the clean water pipe to the clean water discharge port, a clean water discharge port for discharging water; and 2) a drain water discharge state, the movable hole is used to block the first hole and the third hole, and the second hole is opened, thereby allowing water to pass through the purified water a device and the second raw water pipe, and the flow direction is coupled to the second raw water pipe The upstream drainage drain is drained and drained from the drain drain.