JP2004100351A - Water purifying system and faucet specific to purified water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a branch-type water purifying system having a faucet specific to purified water, which is easy to operate, compact in structure, and minimizes infiltration of airborne bacteria etc. from an outlet of the faucet specific to purified water, and breeding of bacteria in a hose, to thereby exhibit an excellent reverse pollution preventive function. <P>SOLUTION: The water purifying system is constituted by branching a channel specific to purified water, for connecting to a water purifier 8, from a water-supply channel 2, and arranging the water purifier 8 in the branched channel 3, to thereby filter tap water. In the system, at least at the time of stopping of spouting of filtered purified water, tap water is introduced into a water purifying channel 6 for spouting purified water, and by virtue of chlorine contained in the tap water, contamination from a purified water spout 7 is suppressed. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention branches a tap water flow path, provides a water purifier using a hollow fiber membrane or the like in the tap water flow path, and discharges purified water filtered by the water purifier from a dedicated water purification faucet. The present invention relates to a purified water purification system and a water purification faucet used for the purified water purification system.
[0002]
[Prior art]
As a water purification system that uses a water purifier to filter a large amount of tap water into purified water, for example, there is a system called a built-in type (undersink type), and this water purification system has a large space in a dead space below a kitchen. A water purifier having a water purifying cartridge is attached, and a large amount of water can be purified by filtering tap water with the water purifier.
When such a water purifier is attached to a faucet, a mixing faucet integrated type (mixing faucet) in which a flow path of the water purifier is integrally provided with a mixing faucet for discharging tap water composed of hot water or water, There is a branch type (single faucet) in which a water purifier dedicated to purifying only water is branched from a water flow path and a water purifier is provided in the branched flow path.
[0003]
The water purification system integrated with a mixing faucet is used by switching between tap water and purified water, and the tap water or purified water is switched and discharged from the discharge port of the faucet each time. Therefore, when one of them is being spouted, the other cannot be spouted, and the tap water and the water purifier cannot be used at once.
On the other hand, the branch type water purification system has separate mixing faucet and water purification faucet, so both can be used at the same time, and tap water and purified water can be spouted at once, resulting in improved functionality during use. There are merits such as being excellent, and thus the dedicated faucet is excellent in usability.
[0004]
By the way, in the case of a water purification system integrated with a mixing faucet, since tap water and purified water are used alternately, the vicinity of the surface of the discharge port for discharging the tap water and purified water containing chlorine or the like having a disinfecting and sterilizing action is used. Are mixed.
On the other hand, in the case of a branch type water purification system, since only purified water is used, the discharge port surface and the flow path from the vicinity of the discharge port surface to the inside of the water purifier are always filled with filtered water. ing.
[0005]
[Problems to be solved by the invention]
As described above, in the case of the branch type water purification system, unlike the case of the water purification system integrated with the mixing faucet, only the purified water is always discharged from the outlet side. And bacteria such as airborne bacteria in the air easily enter from the discharge port.
[0006]
In this way, the contamination in which fungi infiltrate from the discharge port is generally called reverse contamination, and the frequency of occurrence of this contamination is considered to be affected by whether or not the tap water contains chlorine, Once reverse contamination has occurred, this contamination is caused not only by the outlet of the purified water but also by the on / off of the valve used for the dedicated water purifier, not only to the outlet of the purified water but also to the entire inside of the hose connecting the faucet and the water purifier. Contamination may spread.
[0007]
In addition, even if it was in a state before reverse contamination occurred, if fungi adhered to the inner surface of the hose for some reason, the fungi would propagate inside the hose filled with clean water that was not in a chlorine atmosphere. As a result, even if the inner surface of the hose has smoothness and fungi do not easily proliferate, there is a concern that fungal implantation may proceed.
[0008]
On the other hand, purified water obtained by passing through an activated carbon layer has a pH that is slightly alkaline, and it is generally said that mineral (ionic) ions in water crystallize when the ionization equilibrium of water is thus disrupted. . When mineral (ionic) ions in purified water crystallize, they become crystals of silica, calcium, etc. When these crystals are laminated on the fungal landing surface in the hose, a dirty surface of hard components is formed on the inner surface of the hose. In some cases, the surface of the organic substance becomes dirty due to fungi and adheres to the hose.
[0009]
Furthermore, these are easily laminated by the constant flow of purified water in the hose, and when these laminates are laminated to some extent, there is a possibility of secondary contamination that flows off with the purified water from the faucet discharge port. Examples of the type of the laminate include hard components such as silica and organic substances such as algae. In the case of such a faucet system dedicated to water purification, fungi and laminates are contained in purified water purified by a hollow fiber membrane or the like. There was a possibility that the substance could not be able to play the role of the original water purification system due to contamination.
[0010]
Here, as a technique for preventing the generation of microorganisms inside the water purifier, there is a technique disclosed in JP-A-2002-155555. This technology is a water supply device integrated with a mixing faucet, and has a primary flow path for introducing raw water into the water purifier, a secondary flow path from the water purifier to the faucet, and a secondary flow path branched from the primary flow path. A bypass flow path merging with the secondary flow path, a flow path switching / blocking means interposed in the branch portion, a backflow prevention means interposed in the two-time flow path, a control device, and an operation switch; By the path switching / cutoff means, the raw water supply is shut off in the still water, the upstream side and the downstream side of the primary flow path are communicated at the time of purified water discharge, and the upstream side of the primary flow path and the bypass flow path are discharged at the time of raw water discharge. The upstream side of the primary side flow path and the bypass flow path are temporarily communicated with each other every time a predetermined time elapses or the water stop time reaches a set value. However, in order to switch between water purification and raw water discharge, the operation switch must be reversed separately from the water discharge operation, which is troublesome. In addition, since electric components such as an electromagnetic on-off valve and an electric switching valve are used for switching the flow path, in addition to a large device, there is a problem that the switching operation of the flow path cannot be performed during a power failure. I was
[0011]
The present invention has been developed in order to solve the above-mentioned problems, and an object of the present invention is to provide a branch-type water purification system having a water purification-dedicated faucet, and to purify water with a simple operation and a compact structure. An object of the present invention is to suppress the invasion of floating bacteria and the like from the outlet side of a dedicated faucet and the growth of bacterial cells in a hose, and to exhibit an excellent reverse contamination prevention function.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is a method in which a dedicated water purification flow path for connecting to a water purifier is branched from a water flow path, and a water purifier is provided in the branched flow path to filter the tap water. In the water purification system, at least at the end of the filtered water discharge, the tap water is guided into a water purification passage for discharging the purified water, and various bacteria enter the water discharge port which discharges the purified water by chlorine contained in the tap water. This is a water purification system that suppresses water pollution.
[0013]
The invention according to claim 2, in the water discharge stoppage state of the purified water, short-circuits the primary side of the water purifier and the water discharge port side, thereby relieving the pressure in the water purifier and preventing water leakage from the water discharge port. It is a water purification system.
[0014]
The invention according to claim 3 is a faucet used for a water purification system that branches a dedicated water purification channel for connection with a water purifier from a water channel, and provides a water purifier in the branched channel to filter tap water. There is a branch flow path branched from the water flow path, a primary flow path for guiding tap water from the branch flow path into the water purifier, and a water discharge flow path for discharging purified water from the water purifier. A port for connecting and opening a water discharge branch flow path branched from the water discharge flow path is formed in the valve body that opens and closes the branch flow path, and at least in the process of closing the branch flow path, the branch flow path and the water discharge branch flow It is a water tap dedicated to water purification used in a water purification system in which tap water is communicated to a water discharge passage by communicating with a road through the port.
[0015]
The invention according to claim 4 is a water purifier dedicated to water purification used in a water purification system provided with a lock mechanism for fixing the rotation of the valve body so that the communication state between the branch flow path and the water discharge branch flow path can be maintained.
[0016]
The invention according to claim 5 is that, in the closed state of the branch flow path, the primary side flow path communicates with the water discharge branch flow path, and the pressure in the water purifier is relieved from the water discharge port through the water discharge branch flow path. This is a water tap dedicated to water purification used in a water purification system that prevents water leakage from the water discharge port.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of a water purification system and a water purification faucet used for the same according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory view showing an example of a water purification system of the present invention. In the drawing, reference numeral 2 denotes a water flow path through which tap water flows, and 3 denotes a branch from the water flow path 2 and a water purifier 8. The tap water is introduced from the branch flow path 3 into the faucet body 6.
[0018]
Reference numeral 4 denotes a primary flow path for guiding tap water from the branch flow path 3 into the faucet body 6 into the water purifier 8, and reference numeral 5 denotes a water discharge flow for discharging purified water from the water purifier 8. Road. From the water discharge channel 5, a water discharge branch channel 5a is provided in a branched manner, and the water discharge branch channel 5a is connected to the valve body 10.
[0019]
As shown in FIG. 7, the rotary valve body 10 is formed in a cylindrical shape inside the faucet main body 6, and the valve body 10 is integrally mounted on a handle 17 by serration connection or the like. To be rotatable.
A first port 11, a second port 12, and a third port 13, which are communication holes, are provided in the valve body 10 by drilling, and when the valve body 10 is rotated to open and close the flow path of the faucet body 6. The ports 11, 12 and 13 are respectively connected to the branch flow path 3 and the water discharge flow path 5 (discharge branch flow path 5a) through holes (not shown) provided in a shell 15 fixed in the body 6a constituting the faucet body 6. ) And the primary side flow path 4. In addition, reference numeral 14 shown in FIG. 9 denotes a fourth port provided in the valve body 10, and this fourth port forms a flow path by communicating with the primary side flow path 4 when the valve body 10 is fully closed. It is provided as possible.
[0020]
The branch flow path 3 is formed so as to connect the branch joint 3a provided in the water supply flow path 2 and the faucet main body 6 with a hose 18 as shown in FIG. It is provided so that it can flow into the main body 6. The primary flow path 4 is formed so as to connect the faucet main body 6 and the inflow port 8a of the water purifier 8 by a hose 19, so that tap water that has passed through the valve body 10 can flow into the water purifier 8. Provided. Further, the water discharge channel 5 and the water discharge branch channel 5a are formed so as to connect the outlet 8b of the water purifier 8 and the faucet main body 6 by a hose 20 as shown in FIG. It is configured such that purified water can be spouted from the spout 7 of the faucet body 6.
[0021]
Reference numeral 16 denotes a ring interposed between the valve body 10 and the handle 17, and a substantially hemispherical concave portion 16a is provided on a surface of the ring 16 facing the handle 17. On the other hand, reference numeral 17a denotes a ball. The ball 17a is repelled by a spring 17b to form a resilient portion. When the handle 17 is rotated, the ball 17a is engaged with the concave portion 16a to generate a click feeling. ing. If necessary, the handle 17 may be provided with a notation portion indicating an operation position corresponding to the locking position between the ball 17a and the concave portion 16a.
[0022]
The water purification system of the present invention guides the tap water into the water discharge passage 5 which is a water purification passage for discharging the purified water by opening and closing the valve body 10 by rotating the handle 17 at least at the end of the discharge of the filtered purified water. This tap water was guided to the outlet 7 of the purified water to prevent invasion of various bacteria from the outlet 7 by chlorine (free residual chlorine) contained in the tap water.
[0023]
In this water purification system, the faucet main body 6 includes a branch flow path 3 branched from the water flow path 2 for connection with the water purifier 8, and a primary water pipe for guiding tap water from the branch flow path 3 into the water purifier 8. The side flow path 4 is connected to a water discharge flow path 5 for discharging purified water from the water purifier 8, and a valve body 10 that opens and closes the branch flow path 3 is provided with a water discharge branch flow branched from the water discharge flow path 5. A port 12 for opening and closing the passage 5a is formed, and at least in the course of closing the branch passage 3, the branch passage 3 and the water discharge branch passage 5a are communicated via the port 12, and tap water is supplied to the water discharge passage 5 I try to lead to.
[0024]
Reference numeral 8c denotes a casing of the water purifier 8, and a hollow fiber membrane or the like (not shown) is provided inside the casing 8c to obtain a water purifying effect. Since the casing 8c is made of resin, it expands due to water pressure when flowing water, and when the faucet body 6 is closed at the end of water discharge, purified water tends to leak from the water discharge port 7 due to residual pressure in the casing 8c. However, in a state where the water purification is stopped, the primary side flow path 4 and the water discharge flow path 5 of the water purifier 8 are short-circuited to relieve the pressure in the water purifier 8 and prevent water leakage from the water discharge port 7. I made it.
[0025]
It should be noted that a check valve is provided on the water purifier 8 side of the water discharge flow path 5 or a new port for opening and closing the water discharge flow path 5 is provided on the valve body 10 so that tap water flowing through the water discharge branch flow path 5a is discharged. You may make it not flow into the water purifier 8 side via the water flow path 5.
[0026]
Next, the operation of the water purification system and the water faucet dedicated thereto will be described.
9 is a schematic cross-sectional view showing the state of the valve body 10, FIG. 9A is a cross-sectional view taken along line AA of FIG. 7, FIG. 9B is a cross-sectional view taken along line BB of FIG. FIG. 9C is a sectional view taken along the line CC of FIG.
2 to 6, arrows indicate the flow direction of tap water or purified water, and crosses indicate that no fluid flows through the flow path. The position of the faucet handle shown in FIGS. 2 to 6 shows a state viewed from the direction D in FIG.
[0027]
First, the stop state of the water discharge will be described. In this state, as shown in FIGS. 2 and 9, the valve body 10 is fully closed without operating the handle 17 and the rotation angle of the valve body 10 is set to 0 degree. At this time, since the branch channel 3 and the first port 11 do not communicate with each other, the water is not discharged from the water discharge port 7.
FIG. 10 shows the case where the rotation angle of the valve body 10 is set to about 15 degrees. Even in this state, the water is not discharged from the water discharge port 7.
[0028]
Next, the spouting state of tap water will be described. In this state, as shown in FIGS. 3 and 11, the handle 17 is rotated to open the valve body 10 and the branch flow path 3 and the first port 11, the water discharge branch flow path 5a and the second port 12, Are connected to each other. At this time, the tap water passes through the valve body 10 from the branch flow path 3 and flows to the water discharge branch flow path 5a side, and tap water flows out from the water discharge port 7.
In the present embodiment, the valve body 10 can rotate at a rotation angle of 0 to 90 degrees, and tap water and purified water are provided so as to be able to flow within this rotation range. For example, in the state of FIG. Is a state in which the valve body 10 is rotated by about 30 degrees, and in this state, the amount of tap water discharged from the branch flow path 3 to the water discharge branch flow path 5a is maximized. At this time, since the ball 17a is resiliently locked in the concave portion 16a, the lock mechanism 9 has a click feeling. The lock mechanism 9 fixes the rotation of the valve body 10 and allows the branch flow path 3 and the water discharge. The communication state with the branch flow path 5a can be maintained, and the user of the faucet can feel a click feeling, thereby recognizing that the tap water is being discharged.
4 and 12 show a state in which the valve body 10 is rotated by about 45 degrees and a state in which tap water from the water outlet 7 is stopped.
[0029]
Next, the water discharge state of the purified water will be described. In this state, as shown in FIGS. 5 and 13 and 14, the valve body 10 is rotated to open the branch flow path 3 and the first port 11 and the primary flow path 4 and the third port 13 to open. In this state, the water discharge branch flow path 5a and the second port 12 are closed. At this time, the tap water flows from the branch flow path 3 into the primary flow path 4 via the first port 11 and the third port 13, so that the water purifier 8 starts purifying the tap water, and the tap water is discharged from the water discharge port 7. Is spouted. FIG. 14 shows a state in which the valve body 10 is rotated by approximately 90 degrees, and in this state, the amount of purified water discharged is maximum.
[0030]
Subsequently, in order to stop the water discharge of the purified water, the handle 17 is operated to rotate until the first port 11 of the valve body 10 is closed. Since tap water flows into 5a and the lock mechanism 9 operates in the state shown in FIGS. 3 and 11, if this state is maintained for a short time by the lock mechanism 9, the state in which the raw water discharge amount is at a maximum Therefore, a large amount of tap water flows into the valve body 10 from the branch flow path 3 and further flows from the second port 12 to the water discharge branch flow path 5a, so that the tap water flows from the water discharge branch flow path 5a to the water discharge port 7. The road can be filled with tap water.
Therefore, according to the water purification system of the present invention, when the handle 17 is rotated after the use of the purified water, the rotation is temporarily stopped, while being a water tap dedicated to discharging only the purified water. By filling the water from the water discharge channel 5 to the hose 20 and the tip end of the water discharge port 7 with tap water containing chlorine or the like, chlorine can be disinfected by the tap water, and the infiltration of fungi can be suppressed and the discharge from the water discharge port 7 can be prevented. Reverse pollution can be prevented.
Therefore, the tap water can be guided to the purified water spouting channel within the range of the opening and closing rotation of the purified water spouting channel by the manual valve body without using an electromagnetic valve or the like. Secondary pollution in the purified water discharge channel due to the inclination of the water to a weak alkali can be prevented.
In this embodiment, the tap water can be guided to the water outlet 7 through the water discharge branch channel 5a at the start and end of the discharge of the purified water, and in both cases, the tap water is discharged only at the end of the discharge of the purified water. The structure can be simpler than a faucet having a structure for guiding water to the water discharge port 7.
[0031]
Here, assuming that the water discharge amount of the water purifier 8 is 5 L / min, 5000 (cc / min) / 60 (sec) = 83.3 (cc / sec). For example, the capacity from the valve body 10 to the water discharge port 7 is When the average is about 76 cc, the water from the water discharge branch channel 5a to the water discharge port 7 can be filled with tap water by holding the locked state of FIG. 11 for about 1 second. At this time, the inside of the water purifier 8 can be maintained in a state full of water with purified water.
[0032]
In the state of FIG. 9A in which the water purification is stopped, the primary side flow path 4 on the primary side of the water purifier 8 and the water discharge branch flow path 5a on the water discharge side are connected to the fourth port 14 and the fourth port 14. When the branch flow path 3 is closed as shown in FIG. 6 by short-circuiting at the two ports 12, the residual pressure in the water purifier 8 is bypassed to the water discharge port 7 side through the water discharge branch flow path 5a to purify the water. Since the pressure inside the water purifier 8 is relieved, the internal pressure of the water purifier 8 and the pressure at the water discharge port 7 are reduced by reducing the pressure due to the water pressure inside the water purifier 8, so that the water leaks from the water discharge port 7. Can be prevented.
When the faucet body 6 is closed in this way, the water outlet 7 can be filled with tap water, and the outlet of the purified water is closed so that the residual pressure remains in the casing 8c. The water purifier 8 has a longer service life, and the water purifier 8 can be removed without worrying about the internal pressure of the water purifier 8 if the water purifier 8 is in a water-stop state even during maintenance. Has a positive effect.
[0033]
As described above, according to the water purification system of the present invention and the dedicated water purification faucet used therein, tap water can be introduced into the water purifier in the process of opening and closing the branch flow path, that is, in the process of discharging the purified water. The operation can prevent the propagation of various bacteria in the water purifier. In addition, since the switching mechanism between the purified water and the raw water is built into the operation part of the faucet, the water purification system and the faucet as a whole can be made compact, and the tap water can be switched only by manual rotation of the valve. It is possible to prevent the growth of various bacteria in the water purifier without being affected by a power failure or the like.
[0034]
In addition, the rotation angle of the handle 17 from the closed position of tap water other than the embodiment to the time when the water discharge amount of the purified water is fully opened may be, for example, the rotation angle in a range of 0 to 120 degrees. Good. In this case, it is desirable that the angle at which the amount of tap water is maximized when the valve body is rotated is about 60 degrees. In this state, a lock mechanism that allows the ball 17a to repel the concave portion 16a is provided. It is good to provide.
[0035]
【The invention's effect】
As is clear from the above, according to the invention according to claim 1, it is a branch type water purification system having a water faucet dedicated to water purification with excellent functionality, and can easily use tap water containing chlorine and having a disinfecting and sterilizing action. By guiding the purified water into the water purification passage at the end of the discharge of the purified water by a simple operation, it is possible to prevent invasion of fungi such as floating bacteria from the water discharge port at the outlet of the purified water faucet, thereby preventing reverse contamination. In addition, the water purification system has a compact structure that has an effect of suppressing the growth of fungi in the hose and can exhibit an excellent reverse pollution prevention function.
[0036]
According to the invention of claim 2, when the faucet body is closed, the tap water on the primary side of the water purifier is pushed out to the vicinity of the outlet of the faucet body by the pressure relief function. Has no residual pressure and no water leakage from the spout.
[0037]
According to the third aspect of the present invention, the tap is a tap that can guide tap water to the water discharge port with a simple configuration, and is a tap for exclusive use in a water purification system in which the entire water purification system can be provided in a compact configuration. .
[0038]
According to the invention according to claim 4, when the valve body is manually rotated, the communication state of the flow path can be easily maintained, and the water discharge state of the faucet can be easily recognized. This is a tap for exclusive use of water purification.
[0039]
According to the invention according to claim 5, it is possible to maintain the disinfecting and sterilizing action after the channel is closed, and to purify the water used in the water purification system that can surely prevent the propagation of bacteria and reverse contamination in the channel. It is a dedicated faucet.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view showing an example of a water purification system of the present invention.
FIG. 2 is a schematic explanatory view showing a water purification system of the present invention (a valve body rotation angle is about 0 °).
FIG. 3 is a schematic explanatory view showing a water purification system of the present invention (a valve body rotation angle is about 30 °).
FIG. 4 is a schematic explanatory view showing a water purification system of the present invention (valve rotation angle about 45 °).
FIG. 5 is a schematic explanatory view showing a water purification system of the present invention (a valve body rotation angle is about 60 to 90 °).
FIG. 6 is a schematic explanatory view showing the action of relieving the pressure in the water purifier to the primary side flow path (the valve body rotation angle is about 0 °).
FIG. 7 is a half sectional view of the faucet main body.
FIG. 8 is a central longitudinal sectional view of FIG.
FIG. 9 is a schematic sectional view showing a state of a valve body. 7A is a cross-sectional view taken along line AA of FIG. 7, FIG. 7B is a cross-sectional view taken along line BB of FIG. 7, and FIG. 7C is a cross-sectional view taken along line CC of FIG.
FIGS. 10A to 10C are schematic cross-sectional views showing a state where the valve body of FIG. 9 is rotated by about 15 °.
FIGS. 11A to 11C are schematic cross-sectional views showing a state where the valve body of FIG. 9 is rotated by about 30 °.
12 (a) to 12 (c) are schematic cross-sectional views showing a state where the valve body of FIG. 9 is rotated by about 45 °.
13 (a) to 13 (c) are schematic sectional views showing a state where the valve body of FIG. 9 has been rotated by about 60 °.
14 (a) to (c) are schematic sectional views showing a state where the valve body of FIG. 9 is rotated by about 90 °.
[Explanation of symbols]
2 Water supply channel 3 Branch channel 4 Primary side channel 5 Water discharge channel 5a Water discharge branch channel 6 Water faucet main body (water purification channel)
7 Outlet 8 Water purifier 9 Lock mechanism 10 Valve 11 First port 12 Second port 13 Third port 14 Fourth port

Claims (5)

In a water purification system in which a water purifier dedicated flow path for connection with a water purifier is branched from a water flow path and a water purifier is provided in the branched flow path to filter tap water, at least at the end of spouting of the filtered purified water, A water purification system characterized in that tap water is guided into a water purification passage for discharging water, and bacteria contained in the tap water are prevented from entering through a water discharge port for discharging purified water by chlorine contained in the tap water. 2. The water purification system according to claim 1, wherein in the water purification stop state, the pressure in the water purifier is relieved by short-circuiting the primary side of the water purifier and the water discharge port side to prevent water leakage from the water discharge port. A water tap for use in a water purification system that branches a dedicated water purification flow path for connection with a water purifier from a water flow path, and installs a water purifier in the branched flow path to filter tap water. And a primary flow path for guiding tap water from the branch flow path into the water purifier, and a water discharge flow path for discharging purified water from the water purifier, and the branch flow path is connected. In the valve body that opens and closes, a port that opens and closes a water discharge branch flow path branched from the water discharge flow path is formed, and at least in the process of closing the branch flow path, the branch flow path and the water discharge branch flow path are connected through the port. A tap dedicated to water purification used in a water purification system, wherein the tap water is communicated and led to a water discharge passage. The water purification tap according to claim 3, further comprising a lock mechanism for fixing the rotation of the valve body so as to maintain the communication state between the branch flow path and the water discharge branch flow path. In the closed state of the branch flow path, the primary side flow path and the water discharge branch flow path communicate with each other, and the pressure in the water purifier is relieved from the water discharge port through the water discharge branch flow path, whereby water leakage from the water discharge port is caused. A water purification faucet for use in the water purification system according to claim 3, wherein water faucet is prevented.

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