JP3398661B2 - Water supply device - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention selects raw water such as tap water and purified water obtained by passing the raw water through a water purifier to remove disinfecting chlorine, harmful components, odorous components, impurities and the like from a faucet. The present invention relates to a water supply device for discharging.

[0002]

2. Description of the Related Art Generally, a water purifier is one in which a filter material such as a hollow fiber membrane filter is loaded as a water purifying material, and a water switch is operated by operating a switch such as a lever or a push button provided near the faucet. The one in which a solenoid valve interposed in a primary side flow path for introducing raw water such as water is opened / closed to perform water discharge / water stop is commonly used. Since the purification capacity of the internal water purifying material gradually decreases with use, the water purifying material is replaced after the lapse of a predetermined use period or when the cumulative water flow rate reaches a set value.

However, since chlorine for disinfection in the raw water is adsorbed by the filter medium inside the water purifier and loses its disinfecting power, microorganisms such as various bacteria and algae are accumulated in the accumulated water particularly when a long time has passed in the still water state. Are easily proliferated, and the quality of the purified water derived therefrom may deteriorate, leading to unsanitary conditions. For this reason, in the past, when using after stopping the water for a long time such as the first use every morning, or each time it is used, it is encouraged to discard a certain amount from the beginning of the purified water. It is troublesome for the user, and the proper amount of waste water is not known, and it is often the case that the water that has been altered due to forgetting or lack of waste water is used. However, there was a problem that the amount of water flow increased and the purification capacity of the water purifier declined faster.

Therefore, in recent years, as a water purifier with a drainage mechanism, a timer is used to temporarily open a solenoid valve in the primary side flow path of the water purifier, or the control unit accumulates a stoppage time. There has been introduced a system in which the solenoid valve is temporarily opened every time the set value is reached to automatically discard water and renew the accumulated water in the water purifier (Actual Kaihei 4-118187). No. 6, JP-A-6
-182333, JP-A-6-285457, etc.).

[0005]

However, in the above-mentioned conventional water purifier with a drainage mechanism, the accumulated water in the water purifier is forcibly renewed, so that the growth of microorganisms can be suppressed to some extent, but it is not sufficient. In addition to the fact that the waste of purified water due to unnecessary waste water tends to increase, the water tariff increases and the purification capacity of the water purification material deteriorates early due to the increase in the amount of water passing, and the prescribed replacement is required. There was a concern that the original water purification function of the water purifier would be lost before the time.

On the other hand, regarding water used in a form not ingested in the body, for example, when washing dishes and cooking utensils after use,
There is no need to bother to use purified water through a water purifier, and raw water (tap water) can be used as it is. Therefore, in the past, a raw water faucet was provided separately from the water purification faucet connected to the secondary side flow passage of the water purifier, and the raw water flow branched on the upstream side of the solenoid valve of the primary side flow passage was provided to this faucet. A structure that connects roads is often used, but because of this, equipment costs are high and
In a narrow sink such as a kitchen, the space is narrowed by two faucets, and there is a problem in that it is inconvenient to use.

In view of the above-mentioned circumstances, the present invention reliably prevents the growth of microorganisms in the water purifier without bothering the user, and thus can minimize the waste of the purified water due to the waste water. In comparison, the life of the water purification material can be significantly extended, and one faucet can be used for both clean water and raw water, and it is an object of the present invention to provide a water supply device that can reduce the equipment cost accordingly.

[0008]

In order to achieve the above object, a water supply apparatus according to the invention of claim 1 is a water purifier containing a water purification material, and a primary side flow path for introducing raw water into the water purifier. And a secondary side flow path from the outlet of the water purifier to the faucet, a bypass flow path branching from the middle of the primary side flow path to join the secondary side flow path, and a flow path switching interposed in the branch portion.・ Blocking means, backflow blocking means interposed upstream of the merging portion of the bypass flow path in the secondary side flow path, control device for controlling operation of the flow path switching / blocking means, and purified water from faucet And an operation switch for instructing discharge / stoppage of raw water, wherein the control device causes the upstream side of the primary side flow path to the downstream side of the primary side flow path by the flow path switching / blocking means during the stoppage of water. It is not connected to both the bypass flow path and the bypass flow path, and it is instructed by the operation switch to discharge purified water. The upstream side and downstream side of the primary side flow path are communicated with each other, while the upstream side of the primary side flow path is communicated with the bypass flow path according to the instruction of raw water discharge, and the set value is set every predetermined time or the stoppage time. Is set so that the upstream side of the primary side flow path and the bypass flow path are temporarily communicated with each other.

In the water supply device having the above structure, when the operation switch is instructed to discharge purified water, the raw water flows into the water purifier through the primary side flow path, becomes purified water, and is discharged from the faucet through the secondary side flow path. To be done. Further, when the operation switch is instructed to discharge the raw water, the raw water directly enters the secondary side flow path from the bypass flow path and is discharged from the faucet as it is as the raw water. Since the backflow prevention means is provided upstream of the connection portion of the secondary side flow passage with the bypass flow passage, the raw water flows back through the secondary side flow passage in the water purifier in the raw water discharge state. It does not enter and the accumulated water in the secondary side flow path does not flow back into the water purifier even when the water is stopped.

Further, in this water supply device, even if the user does not collect water for a long time, after a certain period of time, the raw water is automatically flushed through the bypass passage to temporarily discharge from the faucet. Since the accumulated water from the middle of the secondary side flow path to the faucet is updated, it is possible to prevent microorganisms such as external bacteria from entering the water purifier through the secondary side flow path, When the raw water is tap water containing chlorine for disinfection, the secondary passage can be disinfected by the flushing. In this flushing, it is only necessary to renew the accumulated water between the middle of the secondary side flow path and the faucet, so it is necessary compared to renewing (discarding) the accumulated water in the entire inside of the water purifier. The amount of water is significantly reduced, and since the raw water is not passed through the water purifier, the purification capacity of the water purification material does not have to be reduced. Further, even when the automatic drainage function is added, the setting time can be significantly lengthened compared to the conventional case because of the effect of the flushing.

According to a second aspect of the present invention, in the water supply apparatus according to the first aspect, the flow passage switching / cutting-off means is composed of an electromagnetic on-off valve and a two-way flow passage switching valve arranged downstream thereof. Is supposed to be. In this case, the electromagnetic on-off valve shuts off the raw water supply side when water is stopped, and the two-way flow path switching valve switches the primary side flow path and the bypass flow path during water discharge.

[0012] In the invention of claim 3, the above-mentioned claim 1 or 2
In the water supply device, the check valve is used as the check valve in the secondary side flow passage. In this case, it is not necessary to perform drive control by the control device to prevent backflow,
Since it is only necessary to interpose a check valve in the secondary side flow path,
The device configuration becomes simple.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a water supply device of the present invention will be specifically described with reference to the drawings. FIG. 1 (a) is a partially longitudinal front view schematically showing the entire water supply device of the first embodiment, FIG. 1 (b) is a side view of a faucet part, and FIG. 2 (a) to (c).
4 is a schematic diagram showing a piping system and a control system of the water supply device, FIG. 3 is a flowchart of one control system of the water supply device, FIG.
Is a flowchart of another control method of the water supply device,
FIG. 5 is a detailed view of an omitted portion of FIGS. 3 and 4. 6 to 8 are schematic diagrams showing the piping system of each water supply device of the second to fourth embodiments.

As shown in FIG. 1 (a), the water purifier (1)
In the vertical cylindrical case (10), the vertical cylindrical cartridge (11) is detachably and replaceably housed. The cartridge (11) has a filter material (not shown), such as a hollow fiber membrane filter, as a water purifying material inside. Then, the operation lever (2a) at the base of the faucet (2) arranged above the water purifier (1) is a turning lever type operation switch (3) for instructing water spouting / stopping at the faucet (2). And a pilot lamp (4). Further, the flow path switching unit (5) is arranged at a position at an intermediate height between the water purifier (1) and the faucet (2).

The flow path switching unit (5) comprises a primary side flow path section (60), a secondary side flow path section (70), and a bypass flow path for short-circuiting the flow path sections (60) (70). An inlet (60a) of the primary side flow path section (60), which is provided with a channel (8)
The electromagnetic on-off valve (9) is on the side, and the electric switching valve (12) as a two-way flow path switching valve is on the downstream side of the electromagnetic on-off valve (9).
In addition, the bypass channel (8) in the secondary channel section (70)
Check valves (13) are respectively provided on the upstream side, that is, on the inlet (70a) side of the connection portion with. Thus, the electromagnetic opening / closing valve (9) and the electric switching valve (12) constitute a flow path switching / cutoff means.

The electric switching valve (12) is shown in FIG.
As shown in (c), the cylindrical valve body (12a) has flow passage holes (12b) open at both ends with a phase difference of 90 degrees on the circumferential surface, and is driven by the stepping motor (14). By reversing 90 degrees in the circumferential direction (1/4 rotation), the purified water lead-out position for communicating the primary side flow path part (60) from the inlet (60a) to the outlet (60b) as shown in FIG. Then, as shown in FIG. 2C, the flow passage can be switched to the raw water outlet position where the inlet (60a) side of the primary side flow passage portion (60) communicates with the bypass flow passage (8).

Reference numeral (15) is a manual water faucet provided at a branch from the water pipe (16), and has a built-in check valve and flow rate adjusting valve. Therefore, the inlet (6) of the manual water faucet (15) and the primary side flow path portion (60) of the flow path switching unit (5) are
0a) and the raw water supply pipe (6a) is connected,
A raw water introduction pipe (6b) is connected between the outlet (60b) of the same-side flow path portion (60) and the inlet (1a) of the water purifier (1) to supply tap water to an electromagnetic on-off valve (9) and an electric motor. Switching valve (1
It constitutes a primary side flow path (6) which is introduced into the cartridge (11) of the water purifier (1) via 2). In addition, the purified water outlet pipe (7a) is connected between the outlet (1b) of the water purifier (1) and the inlet (70a) of the secondary side flow passage part (70) of the flow passage switching unit (5), The secondary side flow path part (7
The purified water supply pipe (7b) is connected between the outlet (70b) of 0) and the faucet (2), and the purified water that has permeated the inside of the cartridge (11) is passed to the faucet (2) through the check valve (13). It constitutes the secondary flow path (7) to be guided.

Reference numeral (17) is a control device, which is connected to the operation switch (3), the pilot lamp (4), the electromagnetic on-off valve (9) and the electric switching valve (12), respectively, as shown in FIG. It has a built-in micro computer having the above control circuit, and has a setting / display panel (17a) on the front surface for performing necessary setting and display, and is attached to an appropriate portion such as under the sink or on the wall surface. (17b) is a display screen of the panel (17a), and (17c) is a plug for connecting to an indoor power supply.

The operation switch (3) is shown in FIG.
The horizontal state indicated by the solid line is the water stop position (OFF), and the upright state indicated by the alternate long and short dash line in the figure is the clean water discharge position (clean water O).
N), the downward hanging state shown by the chain double-dashed line in the figure is used as the raw water discharge position (raw water ON), and the user manually rotates it to arbitrarily switch. Along with this turning operation, a command signal corresponding to each switching position is given to the control device (17), and the control device (17) operates the electromagnetic opening / closing valve (9) and the electric switching valve (12). A signal to operate is output. Further, the pilot lamp (4) is turned off by the control device (17) at the water stop position of the operation switch (3) and turned on at the clean water position and the raw water position.

In the water purifier of this embodiment, however, a plurality of integrating time meters and timers are incorporated in the control circuit of the controller (17), and the control program of the micro computer instructs the operation switch (3). Basic selective water sampling / stopping function to open / close the electromagnetic on-off valve (9) and switch the electric switching valve (12), and flushing to automatically update the accumulated water in the secondary side flow path (7) A function, a life measuring and displaying function of the water purification material in the cartridge (11), and an automatic waste water function of automatically replacing the accumulated water in the water purifier (1) with new water are provided.

In the flushing function, the electromagnetic switching valve (9) of the primary side flow path (6) is set with the electric switching valve (12) as the raw water outlet position every time a predetermined time elapses or every time the water stop time reaches a set value. Is temporarily opened, and the accumulated water in the secondary side flow path (7) is renewed accordingly. In addition, the life measurement display function measures the elapsed time from the start of use of the cartridge (11), and displays when this value reaches a predetermined time as the replacement time (life) of the cartridge (11). The life of the water purification material is displayed on the display screen (17b) of the panel (17a) to instruct replacement of the cartridge (11).

In the water purifier having the above-mentioned structure, the manual faucet (15) of the primary side flow path (6) is adjusted so that the amount of water discharged from the faucet (2) becomes a suitable degree when the purified water or the raw water is sampled. ,
Preliminarily open it appropriately. Then, when the water is stopped, that is, when the operation switch (3) is in the water stop position (OFF), the primary side flow path (6) is closed. In this water-stopped state, the check valve (13) interposed in the secondary-side flow passage (7) allows the accumulated water in the secondary-side flow passage (7) to move the accumulated water in the water purifier (1).
It does not flow back in.

Next, when the user switches the operation switch (3) to the purified water discharge position (purified water ON) in order to use the purified water, the command signal is input to the control device (17) and the control device (17). ), The electric switching valve (1
The electromagnetic on-off valve (9) is opened while 2) is in the purified water outlet position, and tap water passes through the primary side flow path (6) to the water purifier (1).
The purified water that has flowed into the inside and purified in the water purifier (1) is discharged from the faucet (2) through the secondary side flow path (7). Then, after discharging the water, the operation switch (3) is moved to the water stop position (O
FF), the command signal is input to the control device (17), the electric switching valve (9) returns to the closed position by the command from the control device (17), and the purified water is discharged from the faucet (2). Stops.

On the other hand, in order for the user to use the raw water for washing dishes, the operation switch (3) is moved to the raw water discharge position (raw water O
When switched to N), the command signal is input to the control device (17), and the electromagnetic switching valve (9) is operated by the command from the control device (17) while the electric switching valve (12) is in the raw water deriving position. Is opened, tap water flows into the bypass channel (8) from the middle of the primary channel (6), and is discharged from the faucet (2) through the secondary channel (7). Then, when the operation switch (3) is returned to the water stop position (OFF), the discharge of the raw water from the faucet (2) is stopped as described above.

Therefore, it is possible to select and discharge purified water and raw water from the same faucet. Further, in the use of raw water, since the raw water is directly guided to the faucet (2) without passing through the water purifier (1), naturally there is no influence on the purification ability of the water purification material of the water purifier (1). . During the discharge of raw water, the check valve (13) is used to remove water from the secondary side flow path (7) to the water purifier (1).
Backflow into the interior is blocked. Then, the electric switching valve (1
2) is placed in the state at the time of the previous water discharge, and if the connection direction is the same as this time, there is no need to switch, and the stepping motor (14) drives only when it is in the opposite direction.
It will be inverted 0 degrees.

By the way, since chlorine for disinfection (chlorine) in tap water used as raw water is removed by the water purifier (1), the disinfecting property is lost in the secondary side flow passage (7) in a water stopped state after using purified water. The purified water will stay. In addition, the disinfecting property of the raw water accumulated in the secondary side channel (7) after the use of the raw water will decrease with time. Therefore, when the water-stop state becomes long, external microorganisms such as bacteria are removed from the secondary side flow path (7) through the water purifier (1).
It may invade inside and breed, causing water quality deterioration. However, even if the user does not collect water for a long time,
By the flushing function, the raw water is automatically temporarily discharged from the faucet (2) through the bypass channel (8) when the predetermined set time is reached, so that the secondary channel (7) The accumulated water from the middle to the faucet (2) is renewed to prevent the invasion of the above microorganisms, and the tap water containing chlorine for disinfection, which is raw water, disinfects the secondary side flow passage (7). Done.

However, the above flushing is carried out every time a predetermined time elapses, or every time a preset water stop time elapses. In the former case, the control device (17) measures the time from the end of the previous flushing, that is, the non-flushing time, regardless of whether water is discharged from the faucet (2), and when the value reaches the set time. In response to a command from, the solenoid valve (9) of the primary side flow path (6) is temporarily opened for the preset time of the flushing timer with the electric switching valve (12) as the raw water outlet position to discharge the raw water. In the latter case, the time from the end of the water discharge, that is, the water stop time, including the water discharge by the user's operation, the flushing, and the automatic water drain described later, is measured, and the value is the set time. At that time, the raw water is discharged in the same manner as described above.

In this flushing, the secondary side flow path (7)
Since it is only necessary to renew the accumulated water from the middle of the process to the faucet (2), the amount of water required is much smaller than when the accumulated water in the entire water purifier (1) is renewed (discarded water). Since the waste of water can be suppressed and the raw water is discharged without passing through the water purifier (1), the purification ability of the water purification material can be maintained.

On the other hand, the above-mentioned automatic water discharge function measures the switch-off time from the time when the user finishes the discharge of purified water or raw water and returns the operation switch (3) to the water stop position (OFF). When the time reaches the set time, the electromagnetic switching valve (9) is temporarily opened for the set time of the waste water timer by the command of the control device (17) with the electric switching valve (12) as the purified water discharge position. As a result, the tap water flows into the water purifier (1) through the primary side flow path (6), and the water that had accumulated in the water purifier (1) before that flows through the secondary side flow path (7). Since it flows out as waste water from the faucet (2) through it, the water in the water purifier (1) is renewed, and the propagation of various bacteria due to the long-term retention of water in the water purifier (1) is prevented.

However, in the renewal of accumulated water in the water purifier (1) by the automatic drainage function, the above-mentioned flushing function has the function of preventing the invasion of microorganisms and the disinfection action. Compared with the case of a water purifier, the set time for renewing the accumulated water can be significantly longer. Therefore, the water consumption due to this waste water can be markedly reduced as compared with the conventional one, and the life of the water purification material is extended accordingly.

Further, in this water purifier, the elapsed time from the start of use of the cartridge (11) is measured by the life measurement display function, and this value is, for example, 1 from the start of use.
When the replacement time specified for the cartridge (11) such as the year is reached, the display screen (1) of the display panel (17a) (1
The life of the water purification material is displayed on 7b), and the replacement of the cartridge (11) is instructed accordingly. Then, if the cartridge (11) is replaced, the measurement data of the elapsed time is erased, and the measurement is newly started from the time of this replacement. The reset of the measurement may be performed by a switch operation of the user on the setting / display panel (17a) or an automatic switch operation accompanying the attachment / detachment of the cartridge (11) at the time of replacement.

3 to 5 show flow charts of the water supply device of this embodiment. 3 is a control system in which flushing is performed every time a predetermined time elapses, FIG. 4 is a control system in which flushing is performed every elapse of a set water stop time, and FIG. 5 is a part A in FIG.
The detail of the B section of is shown. In these flow charts, the operation switch is abbreviated as SW, the flushing is abbreviated as FL, and the solenoid opening / closing valve (9) of the primary side flow passage (6) is abbreviated as primary side solenoid valve.

As the flow path switching / shutoff means, in the first embodiment, the electromagnetic opening / closing valve (9) and the electric switching valve (12) are used.
However, various other configurations can be used as long as they can switch the primary side flow path (6) and the bypass flow path (8) at the time of water discharge and can shut off the raw water supply side at the time of water stoppage. Can be adopted. For example, the electric switching valve (12) of the first embodiment
Instead of 2 ports and 2 ports as in the second embodiment shown in FIG.
The position electromagnetic switching valve (18) may be used to switch the flow path. Further, the solenoid on-off valve (9) of the first embodiment
It is also possible to use a 3-port / 3-position electromagnetic switching valve (19) as in the third embodiment shown in FIG. 7 in place of both the electric switching valve and the electric switching valve (12). The raw water supply side can be shut off. Therefore, the operation of these electromagnetic switching valves (18) and (19) may be controlled by the control device (17). Alternatively, the flow path switching / cutting-off means may be configured by only the electric switching valve (12). Specifically, the valve body water stop position of the electric switching valve (12) is set to the primary side flow path portion. The outlet (60b) and the bypass passage (8) are not in communication with each other, so that the passage can be blocked only by the electric switching valve (12), while rotating from the water stop position by 45 degrees. As a result, the flow path can be connected to the outlet (60b) of the primary side flow path section or the bypass flow path (8), and the flow path can be switched in this way, and thus the control is simplified by the amount that the electromagnetic on-off valve is unnecessary. Can be converted.

Further, the check valve as in the first embodiment described above is used as the backflow prevention means interposed upstream of the connection portion of the secondary side flow passage (7) with the bypass flow passage (8). 13)
Not limited to this, for example, a normally closed electromagnetic on-off valve (20) such as the water supply device of the fourth embodiment shown in FIG. 8 is used, or both the electromagnetic on-off valve (20) and the check valve (13) are used. You may use together. However, when the check valve (13) is used alone, it is not necessary to perform drive control by the control device (17), and there is an advantage that the device configuration is simplified. Solenoid on-off valve (20)
In the case of using, the control device (17) is set to open when the user collects water with the operation switch (3) as the purified water discharge position and when water is discharged by the automatic water discharge function.

Life of water purification material, that is, cartridge (1
Regarding the replacement time of 1), in the case of the first embodiment, the time elapsed from the start of use was preliminarily specified, but the water passage time from the start of use in accordance with the actual condition of the purification capacity, It may be determined by the amount of water flow, the number of times of water flow, and the like. In particular, the method of determining the replacement time based on the water passage time is advantageous because the actual water purification capacity of the water purification material can be reflected in the replacement time, and there is no need to additionally install a flow sensor or a flow meter. In the setting of the replacement timing based on this water passage time, the purified water discharge time (including the case of using the automatic water discharge mechanism), for example, the electric switching valve (12) of the electric switching valve (12) in the first embodiment, is displayed by the integrated time meter of the control device (17). The open time of the electromagnetic on-off valve (9) at the purified water outlet position is measured and integrated, and when this value reaches the time set in advance as the replacement time, the water is displayed on the display screen (17b) of the display panel (17a). The life of the purification material should be displayed.

The life of the water purification material is displayed on the display screen (14c) of the display panel (14a) as in the first embodiment, and the emission color of the pilot lamp (4) is, for example, normal green. It is possible to employ various display means such as changing from red to red, blinking the pilot lamp (4), and lighting a warning lamp provided on the setting / display panel (14a). Further, although the automatic water drain function by the control device (17) is not essential, the timer setting does not depend on the switch-off time, but the timer is set every time a fixed time elapses or every day such as early morning. It is also possible to have a configuration in which the accumulated water in the water purifier (1) is renewed at the time.

Further, in the above-mentioned embodiment, the cartridge (11) is replaced when the water purifying material reaches the end of its life. However, a structure in which only the water purifying material is replaced can be adopted. In addition, as the water purifying material, one that itself has a filtering function as well as an effect of releasing various ions that are said to be good for health and that is good for health is used, or together with a filtering material such as a hollow fiber membrane filter, You may use together the material which has an ion release action. Further, the operation switch (3) is not limited to the illustrated rotary lever type, but various switching systems such as a push button type and a dial type can be adopted.

[0038]

According to the water supply device of the first aspect of the present invention, the raw water such as tap water and the purified water can be purified from a single faucet by the user simply operating the operation switch according to the purpose of water use. Since you can select and collect any of the purified water that has passed through the vessel, it is easy to use and there is no need to provide two faucets for raw water and purified water, so you can widely use the space near the sink and simplify piping. Therefore, the equipment cost can be reduced.
Moreover, even if the user does not collect water for a long time, after a certain amount of time, the flushing that automatically discharges the raw water temporarily from the faucet is performed, and from the middle of the secondary side flow path of the water purifier. Since the accumulated water up to the faucet is renewed, it is possible to prevent microorganisms such as external bacteria from entering the water purifier through the secondary side flow path, and when the raw water is tap water, flushing the water. By doing so, it is possible to disinfect the inside of the secondary side flow path and effectively prevent the deterioration of the quality of the purified water due to the microbial propagation in the water purifier. In the flushing,
Compared to renewing (discarding) the accumulated water in the entire inside of the water purifier, the required amount of water is much smaller, and since the raw water is not passed through the water purifier, the purification ability of the water purification material does not need to be reduced. In addition, the life of the water purification material can be extended by that much, and even if the automatic drainage function is added, the set time can be taken significantly longer than before, and the waste of wastewater can be significantly reduced. There are advantages.

According to the second aspect of the present invention, the above-mentioned water supply device automatically switches between the flow path for discharging purified water and the flow path for discharging raw water and automatically shuts off the primary side flow path when water is stopped. That can be reliably achieved.

According to the third aspect of the present invention, in the above water supply device, since the check valve is used as the backflow preventing means in the secondary side flow path, it is necessary to perform drive control by the control device to prevent the backflow. However, there is an advantage that the device configuration is simplified.

[Brief description of drawings]

FIG. 1 shows a water supply device according to a first embodiment of the present invention,
(A) is a front view of the entire apparatus, and (b) is a side view of the faucet part.

FIG. 2 shows a piping system and a control system of the water supply device, (a)
The figure is a schematic view of the entire water supply device, (b) is a schematic view of a main part in a purified water discharge state, and (c) is a schematic view of a main part in a raw water discharge state.

FIG. 3 is a flowchart in one control system of the water supply device.

FIG. 4 is a flowchart of another control method of the water supply device.

5 is a supplement to the omitted part in the flow charts of FIGS. 3 and 4, and FIG. 5 (a) is a detailed view of part A of FIG.
FIG. 4B is a detailed view of the portion B in FIG.

FIG. 6 is a schematic diagram showing a main part of a piping system of a water supply device according to a second embodiment of the present invention.

FIG. 7 is a schematic diagram showing a main part of a piping system of a water supply device according to a third embodiment of the present invention.

FIG. 8 is a schematic diagram showing a main part of a piping system of a water supply device according to a fourth embodiment of the present invention.

[Explanation of symbols]

1 ... Water purifier 2 ... Faucet 3 ... Operation switch 5 ... Electric switching valve 6 ... Primary side flow path 7 ... Secondary side flow path 8 ... Bypass flow path 9 ... ..Electromagnetic open / close valve 12 ... Electric switching valve (2-way flow switching valve) 13 ... Check valve 17 ... Control device 18 ... 2-port / 2-position solenoid switching valve (2-way flow switching valve) Switching valve) 19 3 port / 3 position solenoid switching valve (flow path switching /
Shut-off means) 20 ... Electromagnetic on-off valve (back-flow blocking means)

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Claims (3)

(57) [Claims] 1. A water purifier containing a water purification material, a primary side flow passage for introducing raw water into the water purifier, a secondary side flow passage from an outlet of the water purifier to a faucet, and a primary side flow passage. A bypass flow path that branches off from the middle and joins the secondary flow path, a flow path switching / interruption device interposed in the branch portion, and a bypass flow path upstream of the bypass flow flow joining section in the secondary flow path. Equipped with a backflow prevention means, a control device for controlling the operation of the flow path switching / blocking means, and an operation switch for instructing the discharge / stopping of purified water from the faucet and the raw water, By means of the path switching / shut-off means, the upstream side of the primary side flow path is not in communication with both the downstream side of the primary side flow path and the bypass flow path in the still water, and the operation switch instructs the purified water to be discharged. While communicating the upstream side and the downstream side of the primary side flow path, The upstream side of the secondary flow path and the bypass flow path are communicated with each other, and the upstream side of the primary flow path is temporarily communicated with the bypass flow path each time a predetermined time elapses or every time the water stop time reaches a set value. Water supply device that is configured as follows. 2. The water supply device according to claim 1, wherein the flow path switching / cutting-off means is composed of an electromagnetic on-off valve and a two-way flow path switching valve arranged downstream thereof. 3. The water supply device according to claim 1, wherein the backflow prevention means in the secondary side flow path is a check valve.