JPH10192621A - Water purifying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the solution of a problem due to the clogging of filtration parts, in a circulatory water purifying device for cooling tower water and a fountain installed in a park. SOLUTION: Circulatory paths are installed in parallel at spots where filtration parts 5 intervene structurally, and three-way valves 53a, 53b which selectively connect either of a water intake pipe or a water discharge pipe for a circulatory tubular path to the filtration parts 5 are installed on the water intake side of each of the filtration parts 5. In addition, the water discharge side of each of the filtration tanks 51a, 51b is connected together into a single circulatory tubular path. Further, the ON/OFF operation of the three-way valves enables the selective use of the filtration tanks 51a, 51b and the back-flow through the filtration tanks 51a, 51b solves a problem due to the clogging of the tanks 51a, 51b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cold water as a cooling medium for a building cooling and heating device, hot water as a heating medium, water for a cooling tower for cooling a cooling medium, fountains installed in parks, etc. The present invention relates to a water purification device for purifying circulating water while performing a certain forced circulation such as a type of bath water.

[0002]

2. Description of the Related Art Circulation purification of used water is performed from a predetermined water tank.
A circulation line returning to the water tank is formed, and each mechanism necessary for purifying the water is interposed in the circulation line. Specifically, from the outflow side of the water tank, a dust removal unit having a coarse primary filter, a pump unit for forced circulation, a filtration unit for removing minute solids,
A sterilization unit equipped with a sterilization device and a sterilization device is provided in the circulation pipe to realize the purification of the water by circulating the water.

[0003]

However, if the filter is used in the circulation line for a suitable period of time, the filter may be clogged. Therefore, it is necessary to eliminate the clogging. The dust removal section that uses a coarse filter can be easily clogged by removing dust, but the removal of clogging in the filtration section that removes fine solids can be accomplished by removing the filter section. Cleaning was being performed. However, the operation of removing the filtration unit is complicated. Also, during this cleaning, the circulation in the circulation line stops during the cleaning, and especially in the case of bath water, the circulation of water is stopped because the bath water is also heated in the circulation line. Can not. For this reason, it has been proposed to provide a bypass line in the filtration unit, and to pass water through the bypass line and clean only the water when cleaning the filtration unit (JP-A-3-32708).

Accordingly, the present invention proposes a water purification apparatus having a filtering section configuration that does not require removal of the filtering section, and a water purification apparatus that enables cleaning of the filtering section while circulating water.

[0005]

A water purifier according to the present invention forcibly circulates water in a water tank through a predetermined circulation line.
In a purification device in which a filtration unit and a sterilization unit are provided in the middle of the circulation line, only the location where the filtration unit is provided is a parallel circulation path,
A filter tank equipped with a filter is interposed in each of the parallel circulation pipes, and a switching valve for selecting a circulation pipe inlet pipe and a drain pipe and connecting to the filtration tank is provided on the water inlet side of each filter tank. The outlet side of the filtration tank is connected to form one circulation pipe.

Further, in the above-mentioned water purification apparatus, an on-off valve is provided in each of the parallel circulation pipes on the outlet side of the filtration unit and the single circulation pipe after the connection of the parallel circulation pipes. is there.

Therefore, when the switching valve on the water inlet side of each filtration tank is connected to the water inlet pipe, the service water flows in the forward direction, and filtration of the service water is performed. When only one of the filtration sections is connected to the drain pipe, the filtration is performed. The flow is in the opposite direction, the clogging of the filter in the filtration tank is eliminated, and the dust of the filter is discharged out of the circulation pipe through the drain pipe.

In particular, by opening and closing the on-off valve on the water discharge side of the filtration tank, it is possible to clean the unused filtration tank by selectively using the filtration tank, and by utilizing the flowing water pressure of the circulation line. Cleaning of the filter of the filtration tank and supply of cleaning water (purification of water) at the same time as described above can be selectively performed.

[0009]

Next, an embodiment of the present invention will be described. The water purification apparatus shown in the embodiment includes a water tank 1, a circulation pipe 2 for circulating water a in the water tank 1, a dust removal section 3, a pump section 4, and a filtration section 5 provided in the circulation pipe 2. And a sterilizing section 6.

The water tank unit 1 corresponds to, for example, a water storage tank of a cooling tower or a fountain pond.
Is provided with a coarse primary filter that removes large dust that is a hindrance to circulation, the pump unit 4 forcibly circulates the water a, and the filtration unit 5 filters fine solids. The sterilization unit 6 is provided with a fine filter to be removed. The sterilization unit 6 performs ultraviolet sterilization and ozone sterilization, and uses an active tank or the like having a sterilizing action such as tourmaline ore (a type of tourmaline). And sterilizes the filtered water ba. Each of the constituent pipelines (21 to 2) of the circulation pipeline described below is used.
5).

The present invention is characterized in particular by the configuration of the filtration unit 5, and the filtration unit 5 includes two filtration tanks (first filtration tank 51a and second filtration tank 51b) each containing a filter.
Branching the circulation pipeline (intake side pipeline 11) into parallel circulation channels (first water inlet pipe 22a, second water inlet pipe 22b), and connecting and connecting each water inlet pipe 22a, 22b and each filtration tank 51a, 51b. However, as a switching valve in the connection connection of both,
A three-way valve (first three-way valve 52a, second three-way valve 52b) is adopted and interposed at the relevant location. Each three-way valve 52a,
52b selects the connection with each filtration tank 51a, 52b, each water inlet pipe 22a, 22b, the 1st drain pipe 53a, and the 2nd drain pipe 53b. And each filtration tank 51
Each of the outflow pipes 13a and 13b of the first and second filtration tanks 13a and 13b has a filtration tank on-off valve (a first filtration tank on-off valve 54a, a second filtration tank on-off valve 54
b), each of the intake pipes 23a and 23b is a single circulation pipe (filtration section water pipe 14), and a filtration section opening / closing valve 55 is interposed in the filtration section water pipe 54 to connect with the next sterilization section 6. Connecting. The water pipe from the sterilizing section 6 (the sterilizing section water pipe 25) supplies the sterilized water c to the water tank section 1.

In the above-mentioned water purifier, the circulation and purification of the water a in the water tank 1 is performed by operating the pump unit 3 to forcibly circulate the water a. Is performed. In the filtration unit 5, the first filtration tank opening / closing valve 54a on the side of the first filtration tank 51a to be used is opened, and the first three-way valve 53a is connected to the first water inlet pipe 22a and the first filtration tank 51a, The filtration part opening / closing valve 55 is opened. The other second three-way valve 53b is connected to the second drain pipe 53b, and the second filtration tank opening / closing valve 54b is closed. Then,
As illustrated in FIG. 2, the service water a becomes the filtered water b by passing through the first water inlet pipe 22a, the first three-way valve 52a, and the first filtration tank 51a, and the first filtration tank opening / closing valve 54a, the filtration unit opening / closing valve. After passing through 55, the water enters the sterilizing section 6, the water b is sterilized, and the sterilized water c is returned to the water tank section 1. When switching the opening and closing direction of each valve between the first and second,
Filtration by the second filtration tank 51b is performed.

Therefore, the first filtration tank 51a and the second filtration tank 51b can be selectively used, and both can be used simultaneously.

Next, as means for eliminating clogging of the filtration tanks 51a and 52b, when one of the filtration tanks 51 is used, the other filtration tank 51 is independent of the circulating cleaning of the water. Therefore, the filter portion may be removed as it is to perform cleaning. In addition, it is possible to eliminate the clogging of the filter in the filtration tank 51 without removing the filter. Specifically, as illustrated in FIG. 3, for example, the clogging of the second filtration tank 51 b is eliminated by performing the filtration of the water a using the first filtration tank 51 a illustrated in FIG. 2. When the filtration tank on-off valve 54b is opened and the filtration unit on-off valve 55 is closed, the water forcibly circulated from the water tank 1 becomes filtered water b by passing through the first filtration tank 51a, and flows back through the second drain pipe 23b. Then, it enters the second filtration tank 51b, flows backward through the filter, and is discharged out of the circulation pipe 1 from the second drain pipe 53b. At this time, the filter of the second filtration tank 51b is cleaned. The same applies to the first filtration tank 51a.
Can also be done for

Therefore, without removing the filter in the filtration tank 51. This can eliminate clogging of the filter.

Further, if it is inconvenient that clean water cannot be supplied to the water tank section 1 during the cleaning operation of the filtration tank 51, as shown in FIG. A part of the used water b is used for the above-mentioned filter cleaning of the filtration tank 51, a part is supplied to the sterilizing unit 6, and the supply of the used water c is also realized at the same time.

The present invention is not limited to the above-described embodiment. The present invention is not limited to the above-described embodiment, provided that filtration units are provided in parallel so that backflow drainage to each filtration unit is possible. The specific configuration of each part interposed in the middle, for example, in the case of bath water, the interposition of a heating device and the like is completely arbitrarily determined, and the switching valve is not limited to a three-way valve,
A four-way valve or the like can be employed as long as it exhibits the same switching function. Further, each opening / closing valve may employ a flow control valve to determine the shared flow rate of the filtration tanks installed in parallel, or to adjust the amount of filter cleaning water and the amount of purified water supplied to the water tank.

[0018]

As described above, the present invention relates to a water purification apparatus for forcibly circulating water in a water tank to purify water in a filtration section and a sterilization section provided in a circulation line. Only the interposed part of the filtration unit is used as a parallel circulation path, and a switching valve for selecting a circulation pipe inlet pipe and a drain pipe and connecting to the filtration tank is provided on the water inlet side of each filtration unit, and the water outlet side of each filtration tank Is
It is connected to form a single circulation line, and it is possible to selectively use the filtration tank by opening and closing the switching valve, and it is possible to eliminate clogging of the filtration tank without stopping water purification work, and furthermore, filtration tank If an on-off valve is provided in each of the parallel circulation pipelines on the water discharge side and the single circulation pipeline after the connection of the parallel circulation pipelines, the filtration tank is left as it is, and the filtration tank is cleaned and the cleaning water is simultaneously cleaned. Supply can also be realized.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

FIG. 2 is an explanatory view of a flow of water in the filtration section (when a single filtration tank is used).

FIG. 3 is an explanatory diagram of the flow of water in the filtration unit (in the case where one of the filtration tanks is dedicated to washing).

FIG. 4 is an explanatory view of a flow of water in the filtration unit (when cleaning of a filtration tank and supply of purified water are performed simultaneously).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water tank part 2 Circulation line 21 Intake side line 22a First water inlet pipe 22b Second water inlet pipe 23a First water outlet pipe 23b Second water outlet 24 Filtration part water outlet 25 Sterilization part water outlet 3 Dust removal part 4 Pump part 5 Filtration unit 51a First filtration tank 51b Second filtration tank 52a First three-way valve (switching valve) 52b Second three-way valve (switching valve) 53a First discharge pipe 53b Second discharge pipe 54a First filtration tank opening / closing valve 54b Second Filtration tank on-off valve 55 Filtration section on-off valve 6 Sterilization section

Claims (2)

[Claims] 1. A purifying apparatus in which water in a water tank section is forcibly circulated through a predetermined circulation line, and a filtration unit and a sterilization unit are provided in the middle of the circulation line. A parallel circulation path, a filter tank with a filter installed in each of the parallel circulation pipes, and a circulation pipe inlet pipe and a drain pipe are selected on the water inlet side of each filter tank to switch to the filtration tank. A water purification apparatus comprising a valve, and a water outlet side of each filtration tank being connected to form one circulation pipe. 2. The water purification apparatus according to claim 1, wherein an on-off valve is interposed in each of the parallel circulation pipes on the outlet side of the filtration unit and the single circulation pipe after the connection of the parallel circulation pipes. And water purification equipment.