JP2002263638A - Water cleaner having sterilization cleaning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water cleaner by which sterilization cleaning with tap water, when water stays for a long time so that it falls into situation which possibility of development of bacteria, and water safely drunk even in summer. SOLUTION: In the water cleaner having a water cleaning device equipped with a filter for removing a germicide in the city water, when water is not supplied for a fixed time, and a faucet is opened after a fixed time set by a timer, the tap water possessing the germicide is automatically poured into piping between the secondary side of the water cleaning device and the faucet through the by-pass pipe line directly connected with secondary side of the water cleaning device, without passing through the above filter, and is subjected to sterilization cleaning.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purification device for removing a germicide in tap water, and more particularly, to a germicidal washing system for preventing generation and growth of bacteria due to stagnant water from which germicide has been removed. The present invention relates to a water purification device comprising:

[0002]

2. Description of the Related Art In order to make so-called delicious water, a base water purifier having a water purifier provided with a filter of activated carbon or the like for removing chlorine is commercially available. In recent years, similar water purifiers have been installed in supermarkets and the like to sell the water to customers who visit the store or to provide free services. However, when this water purifier is used, the water becomes delicious, but the water that has passed through the filter does not contain chlorine as a bactericide, so that there is a problem that bacteria are generated and proliferate when the water stays for a long time. Particularly in the summer, a large amount of bacteria is generated and multiplied on the secondary side inside the water purifier where tap water from which chlorine has been removed stays and in the piping from the water purifier to the faucet. The generation and proliferation of such a large amount of bacteria was extremely dangerous for human health when consumed.

[0003]

SUMMARY OF THE INVENTION The present invention is intended to solve such a problem, and when water stays for a long time so as to cause a possibility that bacteria may be generated,
It is an object of the present invention to provide a water purification device that can be sterilized and washed with tap water and can be safely drunk even in summer.

[0004]

According to the first aspect of the present invention, there is provided a water purifier having a water purifier provided with a filter for removing a disinfectant in tap water, wherein water is supplied for a certain period of time. If not done, when the tap is opened after a certain period of time set by the timer, the piping from the secondary side of the water purifier to the faucet through the bypass pipe directly connected to the secondary side of the water purifier without passing through the filter It is characterized in that tap water containing a bactericide is automatically flowed into the inside to perform germicidal washing.

According to a third aspect of the present invention, at a preset time, tap water is introduced from the bypass line to the secondary side of the water purifier, and the secondary side water flows through the filter to the primary side, Water is discharged to the outside from a first drain pipe connected to the primary side of the water purifier, and the filter and water on the secondary side of the water purifier are sterilized. With this configuration, not only water on the secondary side of the filter but also bacteria attached to the filter can be sterilized.

According to a fourth aspect of the present invention, at a preset time, tap water flows from the bypass line to the secondary side of the water purifier, and the second drain pipe connected to the secondary side of the water purifier. The water is discharged to the outside from the road, and the water on the secondary side of the water purifier is sterilized. With such a configuration, the secondary side of the filter in which a large amount of water is retained can be always in a state in which bacteria do not generate or proliferate. Drinkable.

Further, according to a fifth aspect of the present invention, after water is discharged to the outside from the first drain and / or the second drain, tap water is passed from the primary side to the secondary side of the filter, and Is configured to discharge water to the outside from a first drain pipe connected to a secondary side of the filter. With this configuration, after sterilization, chlorine-containing water is released, so that delicious and safe water free of chlorine and bacteria can always be drunk.

According to the present invention, bacteria that have been generated and multiplied by removing chlorine and staying for a long time are controlled with tap water. Conventionally, sterilization using tap water has been performed. There is no known water purifier having such a function. Since tap water usually contains a bactericide, it is not necessary to add a bactericide.

The water purifier of the present invention is mainly used as a base water purifier, but can also be used as a water purifier installed near a faucet in a supermarket or the like.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the water purification apparatus of the present invention is connected between water supply pipes 1 and 1 '. Water that has entered the water purifier from the water inlet (water supply pipe 1) is introduced into the water purifier 4 through the valves 2 and 3 and activated, and the activated carbon tank (water purifier) 5, the valve 6 and the water supply pipe 1 are activated. ′, And is supplied for drinking from a water tap (not shown).

Activated stones such as tourmaline and ceramics are filled in the water activating device 4 to activate water passing through the water activating device 4 to make the water delicious and healthy.

[0013] Since tap water from which chlorine has been removed flows through the pipe from the activated carbon tank 5 to the water tap, a large amount of bacteria proliferate especially when tap water is not used for a long time (generally 24 hours or more). That has been confirmed.

Therefore, in the present invention, a first bypass circuit 7 connecting between the valves 2 and 3 and the secondary side of the activated carbon tank 5 is provided.
Is provided. By flowing tap water from the bypass circuit 7 to the secondary side of the water purifier, the secondary side water from which the sterilizing agent has been removed is sterilized.

When the tap is opened, tap water flows. The tap water is detected by a flow switch 8 provided between the activated carbon tank 5 and the valve 6, and the signal is sent to a timer 9 for a long time.
The long-time timer 9 stores a signal from the flow switch 8 and sends an operation signal to the sterilization time timer 10 when the time interval from the previous signal has exceeded a predetermined time (24 hours or more in this embodiment). send.

When the sterilization time timer 10 receives the operation signal of the long-time timer 9, the solenoid valve (valve) 3 is closed, and at the same time the solenoid valve 11 of the bypass circuit is opened to supply tap water to the secondary of the activated carbon tank 5. Then, tap water is flowed from the secondary side of the activated carbon tank 5 to the water faucet for a predetermined time, and sterilized and washed. After the set time, the solenoid valve 3 is opened and the solenoid valve 11 is closed,
It will be in normal clean water condition.

The set time of the sterilization time timer is not particularly limited, but is preferably about 20 to 40 seconds, and particularly preferably about 30 seconds. If it is shorter than this, sterilization will be insufficient, and if it is longer than this, it will be difficult for human psychology to wait.

Between the water supply pipe 1 and the valve 2 and the valve 6
And a second bypass circuit 13 connecting the
The solenoid valve 12 is connected to the bypass circuit 13.

The piping cleaning port 19,
19 'to the flow path connecting both pipe cleaning ports,
An ozone gas dissolver is provided, and the ozone gas generated by the ozone generator is supplied to the ozone gas dissolver to form ozone water,
By flowing the ozone water into the pipe 1 ', the pipe can be sterilized and cleaned. As described above, when the pipe 1 'is sterilized and cleaned, the valves 2, 6, and 12 are closed.

The pipe washing port can be applied to a method of washing a water supply pipe by removing a water meter, such as a jet water washing method other than the ozone washing method and a sand blast method. Alternatively, a chemical such as sodium hypochlorite can be injected into the pipe washing port for sterilization.

If a pipe washing port is provided in the second bypass circuit 13 as described above, sterilization washing of the pipe can be performed without removing the water meter as in the conventional case, so that the sterilization washing operation of the pipe is remarkably performed. Simplified.

FIG. 2 and FIG. 3 show another embodiment of the present invention.
(Filter housing) An example provided with a cleaning mode (B) in 5 is shown.

In-pipe sterilization / cleaning mode (A): when water is not supplied for a predetermined time (24 hours in this embodiment), the flow switch 8 detects that no water has been supplied for 24 hours, and Then, when the faucet is opened and water is supplied, the solenoid valve (SV
1) 3 is closed, the solenoid valve (SV2) 11 is opened, and tap water (raw water) containing chlorine is introduced from the bypass circuit 7 into the pipe to the faucet for a predetermined time (about 20 to 30 seconds in this embodiment). The water is sterilized and washed. Thereafter, the bypass circuit 7 is closed, the normal purified water from which chlorine has been removed is flowed, and the raw water that has been flowed for sterilization and washing is flushed out (the water is discarded for about 20 to 30 seconds).

Water purifier washing mode (B): Preferably, every day, at a fixed time set (1 to 3 am in this embodiment, when water is not normally supplied), the following (1) to (3) Perform sterilization cleaning in the water purifier.

(1) Sterilization and cleaning of the filter secondary side The solenoid valve (SV2) 11 and the solenoid valve (SV3) 15 are opened, and raw water is introduced into the filter secondary tank of the water purifier 5 through the bypass circuit 7. Raw water flows from the opposite side of the normal purified water filtration flow to the primary side of the filter for about 1 minute, and the bacteria generated on the secondary side of the filter and the inside of the filter are sterilized and washed. Is discharged to the outside. At this time, the solenoid valve (SV1) 3 and the solenoid valve (SV4) 17 are closed.

(2) Sterilization and cleaning of the housing secondary side The solenoid valve (SV2) 11 and the solenoid valve (SV3) 17 are opened, and raw water is introduced from the bypass circuit 7 into the filter secondary tank. Using the second drain circuit 18 of the above, the raw water is allowed to flow through the housing secondary side for about 30 seconds for sterilization and cleaning,
The washed raw water is discharged from the second drain circuit 18 to the outside. At this time, the solenoid valve (SV1) 3 and the solenoid valve (SV4)
15 is closed.

(3) Extrusion of raw water in the tank on the secondary side of the housing By the washing in the above (2), the raw water containing chlorine filled in the secondary side of the housing is removed by the purified water from which chlorine has been removed by a normal filtration flow. By flushing from the second drain circuit 18 for about 30 seconds, the raw water is prevented from being used for drinking.

Then, the solenoid valve 17 to the second drain circuit 18 is closed to return to the normal water purification mode. In the above operation, the ball valves with check 2 and 6 are open, and the solenoid valve 12 of the second bypass circuit 13 is closed.

The pipe washing ports 19 and 19 'are connected to each other with the solenoid valve 12 of the second bypass circuit 13 interposed therebetween, and a sterilizing agent can be flown in a flow path connecting the two pipe washing ports to sterilize and clean the inside of the pipes. It has become. When the inside of the pipe is sterilized and washed in this way, the check-equipped ball valves 2 and 6 are closed.

Next, an embodiment in which the apparatus of the present invention shown in FIGS. 2 and 3 is sterilized and cleaned will be described.

The apparatus used in the embodiment has a housing (water purifier) 5 equipped with a filter for removing chlorine, the primary capacity of which is 25 liters and the secondary capacity of 3 liters. The pipe to the faucet is 13 mm in inner diameter and 10 m in length, and the capacity in the pipe is 3 liters.

Example 1 Purified water from which chlorine had been removed was left in a filter secondary tank for 7 days, and the number of general bacteria generated in the tank was 21,0.
In the case of 00 pieces, sterilization and cleaning were performed in the same manner as in the sterilization and cleaning mode (A) in the pipe.

Tap water containing chlorine (chlorine concentration: 0.68 ppm) was supplied to the secondary side of the filter at a rate of 10 liters / minute.
After flowing 6.6 liters for 40 seconds (flow rate 6.6 liters) and then switching to purified water (water filtered with a filter), the number of general bacteria in the purified water flowing out of the tap after flowing 6.6 liters for 40 seconds is 2
Was individual.

Thereafter, the purified water was continued to flow, and the number of bacteria at a predetermined flow rate was measured. The results are shown in Table 1 below.

[0035]

[Table 1] Example 2 Purified water from which chlorine had been removed was left in a filter secondary tank for 7 days, and the number of general bacteria generated in the tank was 4,000.
In the case of 0 pieces, sterilization washing was carried out in the same manner as in the inside of the water purifier washing mode (B).

(1) Sterilization washing of filter secondary side Chlorine-containing tap water (chlorine concentration: 0.
6 ppm) at a flow rate of 10 liters / minute for 1 minute (flow rate 10 liters) and discharged from the first drain circuit 16 on the primary side of the filter, in the same manner as in "(1) Sterilization and cleaning of the filter secondary side". I went.

(2) Sterilization and cleaning of the housing secondary side The chlorine-containing tap water (chlorine concentration: 0.68 ppm) is supplied to the filter secondary tank at a rate of 10 liters / minute for 30 seconds. Except that the water was discharged from the drain circuit 18, the cleaning was performed in the same manner as in “(2) Sterilization and cleaning of the housing secondary side”.

(3) After the above operation (2), the chlorine-containing raw water filling the secondary side of the housing is removed from the second drain circuit by a normal filtration flow with purified water from which chlorine has been removed by 10 liters / liter. 20 minutes in minutes (3.3 liters)
The procedure was the same as in "(3) Extruding raw water in the secondary tank on the housing", except that it was washed away.

Thereafter, the raw water was kept flowing, and the number of bacteria at predetermined intervals of the flow rate coming out of the second drain circuit was measured. The results are shown in Table 2 below.

[0040]

[Table 2]

[0041]

As described above, according to the present invention, even if bacteria are generated and multiply without removing chlorine and supplying water for a long time, the bacteria can be easily sterilized and washed. It can be served safely.

[0042]

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an embodiment of the present invention.

FIG. 3 is a block diagram showing another embodiment of the present invention.

[Explanation of Signs] 1, 1 '... Water supply pipe 4 ... Activator 5 ... Activated carbon tank (water purifier) 7 ... First bypass circuit 8 ... Flow switch 11 ... One drain circuit 13 Second bypass circuit 18 Second drain circuit 19, 19 ′ Pipe cleaning port (existing pipe cleaning port)

Claims (7)

[Claims] In a water purifier having a water purifier provided with a filter for removing a disinfectant from tap water, when water is not supplied for a predetermined time and a faucet is opened after a predetermined time set by a timer, the filter is removed. A sterilization and cleaning system for automatically flowing and disinfecting tap water containing a sterilizing agent into a pipe from the secondary side of the water purifier to a faucet through a bypass line directly connected to the secondary side of the water purifier without passing through. A water purification device comprising: 2. When a predetermined time or more is detected by a flow switch and a timer connected to a pipe between the water purifier and the faucet, a solenoid valve is controlled to control the faucet through the bypass conduit. 2. The water purification device according to claim 1, wherein the water purification device is configured so that tap water flows from the device. 3. At a preset time, tap water is introduced from the bypass line to the secondary side of the water purifier, the secondary water flows through the filter to the primary side, and is connected to the primary side of the water purifier. The water purifier according to claim 1, wherein the filter and the water on the secondary side of the water purifier are sterilized by discharging water from the first drain pipe to the outside. 4. At a preset time, tap water flows from the bypass line to the secondary side of the water purifier, and water is discharged to the outside from a second drain line connected to the secondary side of the water purifier. The water purification device according to any one of claims 1 to 3, wherein the water purification device is configured to sterilize water on a secondary side of the water purification device. 5. After discharging water from the first drain and / or the second drain to the outside, tap water is passed from the primary side to the secondary side of the filter, and the tap water is passed through the secondary side of the filter. 5. The water purification device according to claim 3, wherein the water is discharged from the connected first drain conduit to the outside. 6. A second bypass circuit is provided for connecting the vicinity of the water inlet and the vicinity of the outlet of the water purification device, and a pair of pipe washing ports is provided in the second bypass circuit with a valve interposed therebetween. Item 6. The water purification device according to any one of Items 1 to 5. 7. The water purifier according to claim 1, wherein the water purifier is a so-called original water purifier attached immediately after a water meter of a water supply main pipe.