JPH0857472A - Water purifying device - Google Patents

Abstract

PURPOSE: To simply and certainly perform the changeover of water purification/ washing by operating a changeover valve so that a water supply source is allowed to communicate with the inflow port of a water purifier or a hot water supply source is allowed to communicate with the emitting port of the water purifier and the inflow port and the emitting port are allowed to communicate with each other. CONSTITUTION: When a handle 38 is forwardly rotated to change over a spool 35, water supplied from a pipeline 39 flows in a changeover valve 26 from a port 29 and is emitted to a pipeline 41 from a port 32 to flow in a water purifier 20 from a port 23. As a result, the supplied water is purified by a filter 21 to flow in an opening and closing valve 16 from a port 24 through pipelines 25, 14. When the handle 17 of the cock 11 for the water purifier is rotated to open the opening and closing valve 16, purified water is emitted from a nozzle 12. When the handle 38 is reversely rotated in such a state that the opening and closing valve 16 is closed, the hot water from a pipeline 40 flows in the changeover valve 26 from a port 30 to be emitted to a pipeline 43 from a port 31 and passes through a pipeline 25 to flow in the water purifier 20 from a port 24 to backwash the filter 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purification unit for purifying water using a filter made of activated carbon or the like, and more particularly to a filter cleaning device capable of cleaning the filter.

[0002]

2. Description of the Related Art Generally, water purification by a water purifier is carried out by passing water supplied from a water tank or the like through a filter of a water purifier composed of activated carbon, hollow fiber membranes, etc., and chlorine and impurities contained in the water. Is adsorbed on the filter. Then, when the filtering function of the filter is deteriorated, the water purifier is replaced to properly purify the water.

In recent years, there has been proposed a water purification unit having a function of restoring the filtering function of the filter without replacing the water purifier. As this water purification unit,
For example, the thing of Unexamined-Japanese-Patent No. 4-243591 can be mentioned. In the water purification unit described in this publication, an electric switching valve and a timer are used to flow hot water supplied from an electric water heater or the like for a certain period of time from the water purification outlet of the water purifier to wash the inside of the filter. Then, the hot water is discharged from the drain pipe. By backflowing the warm water through the filter, the adsorption capacity of the activated carbon constituting the filter is restored and the impurities adhering to the hollow fiber membrane are removed. As a result, the purifying ability of the filter is restored, and the same filter can be continuously used without replacing the water purifier.

[0004]

However, the above cleaning unit has the following problems. (1) Since switching between the normal water purification operation and the filter cleaning operation is performed by using a plurality of electric switching valves and timers, the cost becomes high and the power failure or the motor operating the electric switching valve fails. When doing so, it becomes impossible to obtain purified water or the filter cannot be washed.

(2) Since the electric switching valve is switched by the timer, when the timer fails, the electric switching valve cannot be switched, and purified water cannot be obtained or the filter cannot be washed.

(3) Since the hot water after the filter cleaning is simply discharged from the drain pipe, the hot water is wasted. Further, it is conceivable to provide a drain pipe with a faucet only for drainage, but in such a case, a plurality of faucets are required to increase the installation space of the unit and the construction is troublesome.

The present invention has been made to solve the above problems, and a first object thereof is to provide a water purification unit capable of reliably switching between the water purification operation and the cleaning operation of the purification means. It is in.

A second object is to provide a water purification unit which does not require a large installation space, has a simple structure, facilitates construction, and can effectively use hot water after cleaning of the purification means.

[0009]

In order to achieve the above object, in the invention of claim 1, after the water supplied from the water supply source is introduced from the inflow port and the water is purified by passing through the purification means. A water purifier discharging from the discharge port, a first discharge port communicating with the discharge port of the water purifier, a second discharge port communicating with the inflow port of the water purifier, a water supply source and an inflow port of the water purifier A first holding position for maintaining communication between the two or
A switching valve which is operated to be switched to a second holding position for maintaining communication between the hot water source and the discharge port of the water purifier and for maintaining communication between the inflow port of the water purifier and the second discharge port. This is the gist.

The gist of the invention of claim 2 is that the switching operation of the switching valve is performed manually. The gist of the invention of claim 3 is that the first ejection port and the second ejection port are supported by a common support.

A fourth aspect of the present invention is characterized in that a water supply stop valve that connects and disconnects the inflow port of the water purifier and the switching valve is provided between the two.

[0012]

According to the first aspect of the invention, when the purified water is obtained, the switching valve is held at the first holding position. When water is supplied from the water supply source in this state, the water flows through the inflow port of the water purifier through the switching valve and is purified by the purifying means. Then, the purified water (hereinafter referred to as purified water) flows through the discharge port of the water purifier and is discharged to the outside from the first discharge port.

When cleaning the purifying means of the water purifier,
The switching valve is switched and held in the second holding position. When hot water is supplied from the hot water supply source in this state, the hot water flows into the water purifier from the discharge port of the water purifier through the switching valve. That is, the hot water flows in the direction opposite to that in the purified water and flows in the purifying means. At this time, the hot water flows back through the purifying means, so that the adsorbing ability of the purifying means is restored and the attached impurities are removed. The warm water that has cleaned the purification means is then discharged from the inflow port of the water purifier, passes through the switching valve, and is discharged from the second discharge port.

According to the second aspect of the invention, since the switching valve can be manually switched, it can be easily operated regardless of a power failure or the like. According to the invention of claim 3, since the first discharge port and the second discharge port are supported by the common support, the installation space of the unit can be reduced and the construction can be performed easily. Out.

According to the fourth aspect of the present invention, when the purified water is obtained, the water supply stop valve is closed while the switching valve is held at the first holding position, and the inlet port of the water purifier and the switching valve are closed. Not in communication. From this state, the water supply valve is opened to connect the inflow port of the water purifier and the switching valve. As a result, the water from the water supply source flows in through the inflow port of the water purifier, passes through the purifying means and the discharge port, and then flows into the first
Is discharged to the outside from the discharge port. In this way, by closing the water supply stop valve, the water supply to the water purifier is shut off. As a result, high water pressure is not applied to the water purifier, and the load on the water purifier is reduced.

[0016]

【Example】

(First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the mixing stopper 1 is attached and fixed to a top plate 2 of a sink. A water inlet pipe 3 of the mixing tap 1 and a water supply source (a water storage tank or the like) 4 are connected via a water supply pipe line 5. On the other hand, the hot water inflow pipe 6 of the mixing tap 1 and the hot water supply source (gas water heater, etc.) 7 are connected via a hot water supply pipe line 8. By operating the handle 9 of the mixing tap 1, water from the water supply source 4 or hot water from the hot water supply source 8 is discharged from the discharge port 10.

A water purifier plug 11 as a support is attached and fixed to the upper surface of a top plate 2 so as to face the mixing plug 1. The water purifying nozzle 12 as the first outlet and the backwash nozzle 13 as the second outlet are provided in the water purifier plug 11. The purified water nozzle 12 communicates with the purified water inflow pipe 14. An on-off valve 16 is provided between the water purification nozzle 12 and the water purification inflow pipe 14, and the on-off valve 16 is the water purifier plug 11
The handle 17 is opened and closed. Further, the backwash nozzle 13 communicates with the backwash inflow pipe 18. Water purifier 20
Is composed of a filter 21 and a case 22 that houses the filter 21. Inflow port 23 is case 22
Is formed at the bottom of. Further, the discharge port 24 is formed on the upper part of the case 22. The inflow port 23 and the discharge port 24 are communicated with each other via the filter 21.
The filter 21 as a purifying means is composed of well-known activated carbon, hollow fiber membrane and the like. The water purifier discharge pipe line 2 is provided between the discharge port 24 of the water purifier 20 and the purified water inflow pipe 14.
5 are communicated with each other.

As shown in FIGS. 1 and 2, the switching valve 2
6 is attached and fixed to the top plate 2 via a hollow attachment shaft 27. A body 28 constituting the switching valve 26 is connected to the lower portion of the mounting shaft 27. In the body 28, a hot water supply inflow port 29, a hot water supply inflow port 30, a hot water supply discharge port 3
Five ports are formed: 1, dual-purpose port 32 and drain port 33.

A spool 35 is inserted through and supported by the mounting shaft 27 via a sleeve 34 so as to be vertically movable. Four large diameter portions 36A to 36D are formed on the lower portion of the spool 35. The sleeve 34 projects from the top surface of the top plate 2, and a threaded portion 37 is formed on the outer peripheral surface thereof. The water purification / washing switching handle 38 is connected to the spool 35. Further, the water purification / washing switching handle 38 is screwed into the threaded portion 37 of the sleeve 34. When the water purification / washing switching handle 38 is rotated, the handle 38 is moved up and down by the action of the screw portion 37 of the sleeve 34, and the spool 35 is moved up and down accordingly. As the spool 35 moves up and down, the large diameter portion 36A of the spool 35
~ 36D and the contact position of the inner wall of the body 28 changes,
The communication state of each of the ports 29 to 33 is shown in FIG.
3) and the cleaning position (second holding position) in FIG. 3.

The water supply inlet port 29 and the water supply pipe 5 are communicated with each other via a water supply branch pipe 39. Further, the hot water supply inflow port 30 and the hot water supply pipe 8 are communicated with each other via a hot water supply branch pipe 40. Dual-purpose port 32
And the inflow port 23 of the water purifier 20 are connected to each other via a water purifier inflow conduit 41. The backwash inflow pipe 18 of the water purifier plug 11 and the drain port 33 are communicated with each other through a backwash discharge pipe line 42. Hot water discharge port 3
1 and the water purifier discharge pipe line 25 communicate with each other through a hot water supply discharge pipe line 43. A check valve 44 that allows only the flow of hot water from the hot water discharge port 31 side to the water purifier discharge pipe 25 side is provided in the middle of the hot water discharge pipe line 43.

Next, the operation of the water purification unit constructed as above will be described. First, the action during the discharge of purified water will be described. Water and hot water are constantly supplied from the water supply source 4 and the hot water supply source 7. Rotate the clean / wash handle 38 to hold the spool 35 in the position of FIG. As a result, the water from the water supply source 4 passes through the water supply pipe 5 and the water supply branch pipe 39 and flows into the body 28 from the water supply inflow port 29 of the switching valve 26. And
The water is discharged from the combined port 32 to the water purifier inflow conduit 41, and flows into the water purifier 20 from the inflow port 23.
After the water is purified by the filter 21, the discharge port 24
To the water purifier discharge line 25. Further, the purified water passes through the purified water inflow pipe 14 and reaches the opening / closing valve 16.
Here, by rotating the handle 17 of the water purifier plug 11, the opening / closing valve 16 is opened, and purified water is discharged from the water purification nozzle 12. In addition, water purifier discharge line 2
The water flowing in 5 does not flow to the switching valve 26 side due to the action of the check valve 44.

Next, the operation of cleaning the water purifier 20 will be described. When cleaning the water purifier 20, the opening / closing valve 16 of the water purifier plug 11 is held in a closed state. In this state, the purified water / cleaning handle 38 is rotated in the opposite direction to that of the purified water to switch the spool 35 from the position shown in FIG. 2 to the position shown in FIG. As a result, hot water from the hot water supply source 5 passes through the hot water supply pipe line 8 and the hot water supply branch pipe line 40 and flows into the body 28 from the hot water supply inflow port 30 of the switching valve 26. Then, the hot water flows from the hot water supply discharge port 31 to the hot water supply discharge pipe line 43,
The water passes through the water purifier discharge pipe 25 and flows into the water purifier 20 from the discharge port 24.

Further, the hot water flows back through the filter 21 and then flows from the inflow port 23 to the water purifier inflow conduit 41. At this time, the hot water flows backward through the filter 21, so that the filter 21 is washed and the adsorption capacity of the activated carbon constituting the filter 21 is regenerated.
The filtration function of is improved. The hot water that has washed the filter 21 passes through the water purifier inflow conduit 41 and then flows into the body 28 from the dual-purpose port 32. After that, the hot water passes through the backwash discharge pipe line 42 from the drain port 33 and is discharged from the backwash nozzle 13.

By constructing the water purification unit as described above, the following effects can be obtained in this embodiment. (1) The switching valve 26 that can be manually switched is used as a valve for switching between the normal water purification operation and the filter cleaning operation. As a result, unlike the prior art, in this embodiment, it is possible to reliably switch between the water purification operation and the filter cleaning operation even during a power failure.

(2) Since only one switching valve 26 can switch between the normal water purifying operation and the filter cleaning operation, the unit installation space can be reduced, and the number of parts and construction can be simplified. The cost can be reduced.

(3) Clean water nozzle 12 for discharging purified water and filter 21 Backwash nozzle 13 for discharging warm water after cleaning
And were provided on the same water purifier plug 11. This makes it possible to effectively use the warm water after washing, and it is not necessary to individually attach the water purification nozzle 12 and the backwash nozzle 13 to the top plate 2, and the installation space for the unit can be reduced and the construction is facilitated.

(Second Embodiment) Next, a second embodiment of the present invention will be described. In this embodiment, the first
The same members as those in the embodiment will be described with the same member numbers, and detailed description of the members will be omitted.

As shown in FIG. 4, in addition to the purified water inflow pipe 14 and the backwash inflow pipe 18, the first relay pipe 51 is provided in the water purifier plug 11.
And a second relay pipe 52. Therefore, the water purifier plug 1
1 is provided with four tubes 14, 18, 51, 52. An open / close valve 16 is provided between the purified water nozzle 12 and the purified water inflow pipe 14, and the first relay pipe 51 and the second relay pipe 51 are connected to each other.
An open / close valve 55 is provided between the relay pipe 52 and the relay pipe 52. Double open / close valve 1
6, 55 are opened and closed in conjunction with the operation of the handle 17.

Further, the first relay pipe 51 and the switching valve 26
The communication port 32 and the dual-purpose port 32 are communicated with each other via the relay conduit 53. Then, the second relay conduit 52 and the inflow port 23 of the water purifier 21 are connected by the water purifier inflow conduit 41.
Water (warm water) from the water purifier inflow pipe 41 to the first relay pipe 52 between the water purifier inflow pipe 41 and the relay pipe 53.
Communication via a check valve 54 that allows only the flow of.

As shown in FIG. 4, when the switching valve 26 is held at the water purification position (first holding position) and the opening / closing valves 16 and 55 are closed, the water from the water supply source 4 is supplied. Is stopped by the on-off valve 16. And the handle 17
When the on-off valve 16 is opened by the operation of, the water flows toward the second relay pipe 52 side, flows into the water purifier 20 from the water purifier inflow conduit 41, and is purified. The purified water is discharged from the purified water nozzle 12 through the purified water discharge pipe line 25 and the purified water inflow pipe 14.

Further, as shown in FIG. 5, the switching valve 26
Is held at the cleaning position (second holding position) and the open / close valve 16 is closed, hot water from the hot water supply source 7 passes through the hot water supply pipe line 8 and the hot water supply branch pipe line 40. Through the hot water supply inflow port 30 of the switching valve 26 into the body 28. Then, the hot water flows from the hot water supply discharge port 31 to the hot water supply discharge pipe line 43, passes through the water purifier discharge pipe line 25, and flows into the water purifier 20 from the discharge port 24.

Further, the hot water flows back through the filter 21, and then flows from the inflow port 23 to the water purifier inflow conduit 41. Then, the hot water passes through the check valve 54 and flows into the relay conduit 53. Thereafter, the hot water flows from the dual-purpose port 32 of the switching valve 26 to the backwash discharge pipe line 42, and the backwash inflow pipe 18
And is discharged from the backwash nozzle 13.

As described above, in this embodiment, the water from the water supply source 4 can be prevented from flowing to the downstream side of the on-off valve 16 by closing the on-off valve 16 during the water purification. When the purified water is discharged, the handle 17
By opening the on-off valve 16 by the operation of, the purified water can be discharged from the purified water nozzle 12.

That is, in the first embodiment, the on-off valve 1 is operated when the switching valve 26 is held at the water purification position.
Regardless of the open / closed state of 6, the water purifier 20 is always connected to the water source 4
Water pressure is added. On the other hand, in this embodiment, by closing the open / close valve 16, the water pressure of the water supply source 4 is not applied to the water purifier 20. As a result, in this embodiment, in addition to the effects of the first embodiment, the case 22 of the water purifier 20
Also, the pressure resistance of the connection portion of each pipeline can be set low, the degree of freedom in designing can be expanded, and the cost can be reduced.

[0036]

As described above in detail, according to the first aspect of the invention, one switching valve can reliably switch between the water purifying operation and the cleaning operation of the purifying means. Can be converted. In addition, the construction can be facilitated without increasing the installation space, and the hot water after cleaning the purifying means can be effectively used.

According to the second aspect of the present invention, since the switching valve can be manually switched, it is possible to easily and surely obtain purified water regardless of a power failure and to wash the purifying means.

According to the third aspect of the invention, since the first discharge port and the second discharge port are supported by the common support, the installation space for the unit can be reduced and the construction can be simplified. You can do it.

According to the invention of claim 4, a high water pressure is not applied to the water purifier, and the load on the water purifier is reduced. As a result, an inexpensive case having a low pressure resistance can be used as the case or the like constituting the water purifier, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic circuit diagram of a water purification unit of a first embodiment embodying the present invention.

FIG. 2 is a cross-sectional view of the switching valve in a state where the spool is held in the first holding position in the first embodiment.

FIG. 3 is a cross-sectional view of the switching valve in a state where the spool according to the first embodiment is held at a second holding position.

FIG. 4 is a cross-sectional view of the switching valve showing the water purification unit of the second embodiment and in a state in which the spool is held at the first holding position.

FIG. 5 is a cross-sectional view of the switching valve of the water purification unit of the second embodiment, in which the spool is held at the second holding position.

[Explanation of symbols]

4 ... Water supply source, 8 ... Hot water supply source, 23 ... Inflow port 24 ... Discharge port, 21 ... Filter as purification means, 24 ... Discharge port, 20 ... Water purifier, 12 ... Water purification nozzle as first discharge port, 13 ... Backwash nozzle as second discharge port, 2
6 ... switching valve, 27 ... mounting shaft that constitutes the switching valve,
28 ... Body that constitutes the switching valve, 34 ... Sleeve that constitutes the switching valve, 35 ... Spool that constitutes the switching valve, 11 ... Plug for water purifier as a support

Claims (4)

[Claims] 1. After water supplied from a water supply source flows in from an inflow port and the water is purified by passing through a purification means,
A water purifier that discharges from a discharge port, a first discharge port that communicates with the discharge port of the water purifier, a second discharge port that communicates with an inflow port of the water purifier, a water supply source and an inflow port of the water purifier. A first holding position for communicating and holding between the water supply source and the discharge port of the water purifier, and a communication for holding between the inflow port of the water purifier and the second discharge port. A water purification unit including a switching valve that is switched to a holding position of 2. 2. The water purification unit according to claim 1, wherein the switching operation of the switching valve is performed manually. 3. The water purification unit according to claim 1, wherein the first discharge port and the second discharge port are supported by a common support. 4. The water purification unit according to claim 1, further comprising a water supply stop valve provided between the inflow port of the water purifier and the switching valve to connect and disconnect the two.